Merge branch 'master' into compatibility

Conflicts:
	src/Magnum.h
	src/Shaders/DistanceFieldVector.cpp
	src/Shaders/Flat.cpp
	src/Shaders/Vector.cpp

Doxyfile

@@ -204,6 +204,7 @@ ALIASES                = \
     "configurationvalueref{1}=@see @ref configurationvalues \"Corrade::Utility::ConfigurationValue<\1>\"" \
     "configurationvalue{1}=@brief %Configuration value parser and writer @xrefitem configurationvalues \"Configuration value parser and writer\" \"Configuration value parsers and writers for custom types\" Allows parsing and writing \1 from and to Corrade::Utility::Configuration." \
     "collisionoccurenceoperator{2}=@relates \1\n@brief %Collision occurence of %\1 and %\2\n@see \2::operator%(const \1&) const" \
+    "collisionoperator{2}=@relates \1\n@brief %Collision of %\1 and %\2\n@see \2::operator/(const \1&) const" \
     "todoc=@xrefitem todoc \"Documentation todo\" \"Documentation-related todo list\"" \
     "fn_gl{1}=<a href=\"http://www.opengl.org/sdk/docs/man4/xhtml/gl\1.xml\">gl\1()</a>" \
     "fn_gl_extension{3}=<a href=\"http://www.opengl.org/registry/specs/\2/\3.txt\">gl\1<b></b>\2()</a>" \

doc/building.dox

@@ -128,6 +128,10 @@ plan to use them with shared libraries later, enable also position-independent
 code with `BUILD_STATIC_PIC`. If you want to build with another compiler (e.g.
 Clang), pass `-DCMAKE_CXX_COMPILER=clang++` to CMake.
 
+%Magnum by default does not install `FindMagnum.cmake`, as you should bundle
+the module with your code instead of depending on it being in system location.
+You can install it by enabling `WITH_FIND_MODULE`.
+
 By default the engine is built for desktop OpenGL. Using `TARGET_*` CMake
 parameters you can target other platforms. Note that some features are
 available for desktop OpenGL only, see @ref requires-gl.

doc/coding-style.dox

@@ -102,11 +102,15 @@ Additionally to @c \@todoc, @c \@debugoperator @c \@configurationvalue and
 
 @subsubsection documentation-commands-collisionoperator Shape collision operators
 
-Out-of-class operators for collision occurence in Shapes namespace should be
-marked with @c \@collisionoccurenceoperator, e.g.:
+Out-of-class operators for collision and collision occurence in Shapes
+namespace should be marked with @c \@collisionoperator and @c \@collisionoccurenceoperator,
+e.g.:
 @code
 // @collisionoccurenceoperator{Point,Sphere}
 inline bool operator%(const Point& a, const Sphere& b) { return b % a; }
+
+// @collisionoperator{Point,Sphere}
+inline Collision operator/(const Point& a, const Sphere& b) { return (b/a).reverted(); }
 @endcode
 They will appear as related functions within documentation of class for which
 the operator is implemented (not of class in which the operator is

doc/getting-started.dox

@@ -53,7 +53,7 @@ polluted.
 
 @section getting-started-review Review project structure
 
-The base project consists of just seven files in two subfolders. %Magnum uses
+The base project consists of just six files in two subfolders. %Magnum uses
 CMake build system, see @ref cmake for more information.
 
     modules/FindCorrade.cmake
@@ -154,6 +154,9 @@ just build and run the application. If CMake isn't able to find the
 dependencies or the building fails for some reason, you might want to look at
 @ref building-windows-troubleshooting.
 
+If CMake complains about `GlutApplication` missing, you forgot to enable
+`WITH_GLUTAPPLICATION` when building %Magnum, @ref getting-started-download "go back and fix it".
+
 @image html getting-started.png
 @image latex getting-started.png
 

doc/portability.dox

@@ -37,7 +37,7 @@ make porting easier -- it is better to fail at compile time on e.g. undefined
 enum value than fail at runtime in some corner case because given texture
 format is not supported.
 
-If you include Magnum.h, you get these predefined macros:
+If you include @ref Magnum.h, you get these predefined macros:
 
 - @ref MAGNUM_TARGET_GLES if targeting OpenGL ES
 - @ref MAGNUM_TARGET_GLES2 if targeting OpenGL ES 2.0
@@ -109,7 +109,7 @@ available, but also have proper fallback when it's not, see for example
 @ref AbstractTexture-performance-optimization "AbstractTexture" or
 @ref Mesh-performance-optimization "Mesh". See also @ref required-extensions.
 
-@section portability-shaders Portable shaders
+@section portability-shaders Writing portable shaders
 
 %Shaders are probably the most painful thing to port. There are many issues to
 address - different shader syntax (`in`/`out` vs. `attribute` and `varying`
@@ -121,6 +121,11 @@ you can decide on the syntax in your shader code. You can also use
 @ref Context::supportedVersion() to conveniently select highest supported
 version from a list:
 @code
+// MyShader.cpp
+Version version = Context::instance()->supportedVersion({Version::GL430, Version::GL330, Version::GL210});
+attachShader(Shader::fromFile(version, "MyShader.vert"));
+@endcode
+@code
 // MyShader.vert
 #if __VERSION__ < 130
 #define in attribute
@@ -136,12 +141,23 @@ void main() {
     // ...
 }
 @endcode
+
+It is often desirable to query extension presence based on actually used GLSL
+version -- while the extension might be supported in the driver, it might not
+be available in given GLSL version (e.g. causing compilation errors). You can
+use @ref Context::isExtensionSupported(Version) to check that the extension
+is present in given version:
 @code
-// MyShader.cpp
-Version version = Context::instance()->supportedVersion({Version::GL430, Version::GL330, Version::GL210});
-attachShader(Shader::fromFile(version, "MyShader.vert"));
+if(!Context::instance()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>(version)) {
+    bindAttributeLocation(Position::Location, "position");
+    // ...
+}
 @endcode
 
+See also @ref AbstractShaderProgram class documentation for information about
+specifying attribute location, uniform location and texture layer in various
+OpenGL versions.
+
 All shaders in @ref Shaders namespace support desktop OpenGL starting from
 version 2.1 and also OpenGL ES 2.0 and 3.0. Feel free to look into their
 sources to see how portability is handled there.

doc/shapes.dox

@@ -35,6 +35,12 @@ together using various operations.
 
 @section shapes-collection Available shapes
 
+%Magnum provides a set of simple shapes for collision detection, similarly to
+what is found in many other collision detection libraries. Additionally some
+shapes are provided in inverted form -- e.g. inverted box detects collisions on
+outside instead of inside, which might be useful for example to create bounds
+around platformer game level.
+
 @subsection shapes-1D One-dimensional shapes
 
 - @ref Shapes::Point "Shapes::Point*D" -- @copybrief Shapes::Point
@@ -42,7 +48,7 @@ together using various operations.
 - @ref Shapes::LineSegment "Shapes::LineSegment*D" -- @copybrief Shapes::LineSegment
 
 Because of numerical instability it's not possible to detect collisions of
-line and point. Collision of two lines can be detected only in 2D.
+line and point. %Collision of two lines can be detected only in 2D.
 
 @subsection shapes-2D Two-dimensional shapes
 
@@ -51,6 +57,7 @@ line and point. Collision of two lines can be detected only in 2D.
 @subsection shapes-3D Three-dimensional shapes
 
 - @ref Shapes::Sphere "Shapes::Sphere*D" -- @copybrief Shapes::Sphere
+- @ref Shapes::InvertedSphere "Shapes::InvertedSphere*D" -- @copybrief Shapes::InvertedSphere
 - @ref Shapes::Cylinder "Shapes::Cylinder*D" -- @copybrief Shapes::Cylinder
 - @ref Shapes::Capsule "Shapes::Capsule*D" -- @copybrief Shapes::Capsule
 - @ref Shapes::AxisAlignedBox "Shapes::AxisAlignedBox*D" -- @copybrief Shapes::AxisAlignedBox
@@ -96,8 +103,9 @@ Shapes::Composition3D composition = simplified && (sphere || box);
 
 @section shapes-collisions Detecting shape collisions
 
-%Shape pairs which have collision detection implemented can be tested for
-collision using operator%(), for example:
+%Shape pairs which have collision occurence detection implemented can be tested
+for collision using operator%(). The operator returns boolean describing
+whether the collision happened or not. Example:
 @code
 Shapes::Point3D point;
 Shapes::Sphere3D sphere;
@@ -105,6 +113,21 @@ Shapes::Sphere3D sphere;
 bool collide = point % sphere;
 @endcode
 
+As this is useful for e.g. menu handling and simple particle systems, for
+serious physics you often need more information like contact point, separation
+normal and penetration depth. For shape pairs which have implemented this
+detailed collision detection you can use `operator/()`, which returns @ref Collision
+object. Note that unlike with `operator%()` mentioned above, this operation is
+not commutative. See @ref Collision class documentation for more information
+about the returned data. Example:
+@code
+Shapes::Collision3D c = point/sphere;
+if(c) {
+    Vector3 translation = c.separationNormal()*c.separationDistance();
+    // translate point by translation...
+}
+@endcode
+
 @section shapes-scenegraph Integration with scene graph
 
 %Shape can be attached to object in the scene using Shapes::Shape feature and

doc/unsupported.dox

@@ -29,9 +29,15 @@ add any performance gains, is not supported in %Magnum.
 
 @section unsupported-features Unsupported features
 
-- Fixed precision data types (OpenGL ES) are not supported, as they occupy the
-  same memory as floats and they aren't faster than floats on current hardware
-  anymore.
+-   Line and polygon smoothing (`GL_LINE_SMOOTH`, `GL_POLYGON_SMOOTH`) and
+    related functions are not supported, as the driver might do it in software
+    with serious performance drops. Multisampling is far superior solution.
+-   Fixed precision data types (`GL_FIXED` in OpenGL ES) are not supported, as
+    they occupy the same memory as floats and they aren't faster than floats on
+    current hardware anymore.
+-   Shader compiler is assumed to be present (`GL_SHADER_COMPILER` returning
+    true), as all desktop GL implementations and also ES3 are required to
+    support it.
 
 @section unsupported-extensions Unsupported extensions
 

modules/FindCorrade.cmake

@@ -128,6 +128,7 @@ find_path(CORRADE_INCLUDE_DIR
 # CMake module dir
 find_path(_CORRADE_MODULE_DIR
     NAMES UseCorrade.cmake CorradeLibSuffix.cmake
+    PATHS ${CMAKE_ROOT}/Modules
     PATH_SUFFIXES share/cmake/Corrade)
 
 include(FindPackageHandleStandardArgs)
@@ -201,6 +202,10 @@ mark_as_advanced(CORRADE_UTILITY_LIBRARY
     CORRADE_TESTSUITE_LIBRARY
     _CORRADE_MODULE_DIR)
 
-# Include file with macros from our module dir
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${_CORRADE_MODULE_DIR}")
+# Include our module dir, if we have any
+if(NOT "${_CORRADE_MODULE_DIR}" STREQUAL "${CMAKE_ROOT}/Modules")
+    set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${_CORRADE_MODULE_DIR}")
+endif()
+
+# Finalize the finding process
 include(UseCorrade)

src/AbstractFramebuffer.cpp

@@ -47,6 +47,51 @@ FramebufferTarget AbstractFramebuffer::readTarget = FramebufferTarget::ReadDraw;
 FramebufferTarget AbstractFramebuffer::drawTarget = FramebufferTarget::ReadDraw;
 #endif
 
+Vector2i AbstractFramebuffer::maxViewportSize() {
+    Vector2i& value = Context::current()->state().framebuffer->maxViewportSize;
+
+    /* Get the value, if not already cached */
+    if(value == Vector2i())
+        glGetIntegerv(GL_MAX_VIEWPORT_DIMS, value.data());
+
+    return value;
+}
+
+Int AbstractFramebuffer::maxDrawBuffers() {
+    #ifdef MAGNUM_TARGET_GLES2
+    if(!Context::current()->isExtensionSupported<Extensions::GL::NV::draw_buffers>())
+        return 0;
+    #endif
+
+    GLint& value = Context::current()->state().framebuffer->maxDrawBuffers;
+
+    /* Get the value, if not already cached */
+    if(value == 0) {
+        #ifndef MAGNUM_TARGET_GLES2
+        glGetIntegerv(GL_MAX_DRAW_BUFFERS, &value);
+        #else
+        glGetIntegerv(GL_MAX_DRAW_BUFFERS_NV, &value);
+        #endif
+    }
+
+    return value;
+}
+
+#ifndef MAGNUM_TARGET_GLES
+Int AbstractFramebuffer::maxDualSourceDrawBuffers() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::blend_func_extended>())
+        return 0;
+
+    GLint& value = Context::current()->state().framebuffer->maxDualSourceDrawBuffers;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_DUAL_SOURCE_DRAW_BUFFERS, &value);
+
+    return value;
+}
+#endif
+
 void AbstractFramebuffer::bind(FramebufferTarget target) {
     bindInternal(target);
     setViewportInternal();
@@ -331,12 +376,12 @@ void AbstractFramebuffer::readBufferImplementationDSA(GLenum buffer) {
 }
 #endif
 
-void AbstractFramebuffer::readImplementationDefault(const Vector2i& offset, const Vector2i& size, const ImageFormat format, const ImageType type, const std::size_t, GLvoid* const data) {
+void AbstractFramebuffer::readImplementationDefault(const Vector2i& offset, const Vector2i& size, const ColorFormat format, const ColorType type, const std::size_t, GLvoid* const data) {
     glReadPixels(offset.x(), offset.y(), size.x(), size.y(), static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 
 #ifndef MAGNUM_TARGET_GLES3
-void AbstractFramebuffer::readImplementationRobustness(const Vector2i& offset, const Vector2i& size, const ImageFormat format, const ImageType type, const std::size_t dataSize, GLvoid* const data) {
+void AbstractFramebuffer::readImplementationRobustness(const Vector2i& offset, const Vector2i& size, const ColorFormat format, const ColorType type, const std::size_t dataSize, GLvoid* const data) {
     /** @todo Enable when extension wrangler for ES is available */
     #ifndef MAGNUM_TARGET_GLES
     glReadnPixelsARB(offset.x(), offset.y(), size.x(), size.y(), static_cast<GLenum>(format), static_cast<GLenum>(type), dataSize, data);

src/AbstractFramebuffer.h

@@ -137,11 +137,13 @@ See DefaultFramebuffer and Framebuffer for more information.
 
 The engine tracks currently bound framebuffer and current viewport to avoid
 unnecessary calls to @fn_gl{BindFramebuffer} and @fn_gl{Viewport} when
-switching framebuffers.
+switching framebuffers. %Framebuffer limits and implementation-defined values
+(such as @ref maxViewportSize()) are cached, so repeated queries don't result
+in repeated @fn_gl{Get} calls.
 
 If @extension{ARB,robustness} is available, read() operations are protected
 from buffer overflow.
-@todo @extension{ARB,viewport_array}
+@todo @extension{ARB,viewport_array} (and `GL_MAX_VIEWPORTS`)
 */
 class MAGNUM_EXPORT AbstractFramebuffer {
     friend class Context;
@@ -152,6 +154,43 @@ class MAGNUM_EXPORT AbstractFramebuffer {
     AbstractFramebuffer& operator=(AbstractFramebuffer&&) = delete;
 
     public:
+        /** @todo `GL_IMPLEMENTATION_COLOR_READ_FORMAT`, `GL_IMPLEMENTATION_COLOR_READ_TYPE`, seems to be depending on currently bound FB (aargh) (@extension{ARB,ES2_compatibility}). */
+
+        /**
+         * @brief Max supported viewport size
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls.
+         * @see @ref setViewport(), @fn_gl{Get} with @def_gl{MAX_VIEWPORT_DIMS}
+         */
+        static Vector2i maxViewportSize();
+
+        /**
+         * @brief Max supported draw buffer count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If ES extension @extension{NV,draw_buffers} is not
+         * available, returns `0`.
+         * @see @ref DefaultFramebuffer::mapForDraw(), @ref Framebuffer::mapForDraw(),
+         *      @fn_gl{Get} with @def_gl{MAX_DRAW_BUFFERS}
+         */
+        static Int maxDrawBuffers();
+
+        #ifndef MAGNUM_TARGET_GLES
+        /**
+         * @brief Max supported dual-source draw buffer count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,blend_func_extended} is
+         * not available, returns `0`.
+         * @see @ref DefaultFramebuffer::mapForDraw(), @ref Framebuffer::mapForDraw(),
+         *      @fn_gl{Get} with @def_gl{MAX_DUAL_SOURCE_DRAW_BUFFERS}
+         * @requires_gl Multiple blending inputs are not available in
+         *      OpenGL ES.
+         */
+        static Int maxDualSourceDrawBuffers();
+        #endif
+
         /**
          * @brief Copy block of pixels
          * @param source            Source framebuffer
@@ -215,7 +254,7 @@ class MAGNUM_EXPORT AbstractFramebuffer {
          * Saves the viewport to be used at later time in bind(). If the
          * framebuffer is currently bound, updates the viewport to given
          * rectangle.
-         * @see @fn_gl{Viewport}
+         * @see @ref maxViewportSize(), @fn_gl{Viewport}
          */
         AbstractFramebuffer& setViewport(const Rectanglei& rectangle);
 
@@ -322,10 +361,10 @@ class MAGNUM_EXPORT AbstractFramebuffer {
         void MAGNUM_LOCAL readBufferImplementationDSA(GLenum buffer);
         #endif
 
-        typedef void(*ReadImplementation)(const Vector2i&, const Vector2i&, ImageFormat, ImageType, std::size_t, GLvoid*);
-        static void MAGNUM_LOCAL readImplementationDefault(const Vector2i& offset, const Vector2i& size, ImageFormat format, ImageType type, std::size_t dataSize, GLvoid* data);
+        typedef void(*ReadImplementation)(const Vector2i&, const Vector2i&, ColorFormat, ColorType, std::size_t, GLvoid*);
+        static void MAGNUM_LOCAL readImplementationDefault(const Vector2i& offset, const Vector2i& size, ColorFormat format, ColorType type, std::size_t dataSize, GLvoid* data);
         #ifndef MAGNUM_TARGET_GLES3
-        static void MAGNUM_LOCAL readImplementationRobustness(const Vector2i& offset, const Vector2i& size, ImageFormat format, ImageType type, std::size_t dataSize, GLvoid* data);
+        static void MAGNUM_LOCAL readImplementationRobustness(const Vector2i& offset, const Vector2i& size, ColorFormat format, ColorType type, std::size_t dataSize, GLvoid* data);
         #endif
         static ReadImplementation MAGNUM_LOCAL readImplementation;
 };

src/AbstractImage.cpp

@@ -26,117 +26,117 @@
 
 #include <Utility/Assert.h>
 
-#include "ImageFormat.h"
+#include "ColorFormat.h"
 
 namespace Magnum {
 
-std::size_t AbstractImage::pixelSize(ImageFormat format, ImageType type) {
+std::size_t AbstractImage::pixelSize(ColorFormat format, ColorType type) {
     std::size_t size = 0;
     switch(type) {
-        case ImageType::UnsignedByte:
+        case ColorType::UnsignedByte:
         #ifndef MAGNUM_TARGET_GLES2
-        case ImageType::Byte:
+        case ColorType::Byte:
         #endif
             size = 1; break;
-        case ImageType::UnsignedShort:
+        case ColorType::UnsignedShort:
         #ifndef MAGNUM_TARGET_GLES2
-        case ImageType::Short:
+        case ColorType::Short:
         #endif
-        case ImageType::HalfFloat:
+        case ColorType::HalfFloat:
             size = 2; break;
-        case ImageType::UnsignedInt:
+        case ColorType::UnsignedInt:
         #ifndef MAGNUM_TARGET_GLES2
-        case ImageType::Int:
+        case ColorType::Int:
         #endif
-        case ImageType::Float:
+        case ColorType::Float:
             size = 4; break;
 
         #ifndef MAGNUM_TARGET_GLES
-        case ImageType::UnsignedByte332:
-        case ImageType::UnsignedByte233Rev:
+        case ColorType::UnsignedByte332:
+        case ColorType::UnsignedByte233Rev:
             return 1;
         #endif
-        case ImageType::UnsignedShort565:
+        case ColorType::UnsignedShort565:
         #ifndef MAGNUM_TARGET_GLES
-        case ImageType::UnsignedShort565Rev:
+        case ColorType::UnsignedShort565Rev:
         #endif
-        case ImageType::UnsignedShort4444:
+        case ColorType::UnsignedShort4444:
         #ifndef MAGNUM_TARGET_GLES3
-        case ImageType::UnsignedShort4444Rev:
+        case ColorType::UnsignedShort4444Rev:
         #endif
-        case ImageType::UnsignedShort5551:
+        case ColorType::UnsignedShort5551:
         #ifndef MAGNUM_TARGET_GLES3
-        case ImageType::UnsignedShort1555Rev:
+        case ColorType::UnsignedShort1555Rev:
         #endif
             return 2;
         #ifndef MAGNUM_TARGET_GLES
-        case ImageType::UnsignedInt8888:
-        case ImageType::UnsignedInt8888Rev:
-        case ImageType::UnsignedInt1010102:
+        case ColorType::UnsignedInt8888:
+        case ColorType::UnsignedInt8888Rev:
+        case ColorType::UnsignedInt1010102:
         #endif
-        case ImageType::UnsignedInt2101010Rev:
+        case ColorType::UnsignedInt2101010Rev:
         #ifndef MAGNUM_TARGET_GLES2
-        case ImageType::UnsignedInt10F11F11FRev:
-        case ImageType::UnsignedInt5999Rev:
+        case ColorType::UnsignedInt10F11F11FRev:
+        case ColorType::UnsignedInt5999Rev:
         #endif
-        case ImageType::UnsignedInt248:
+        case ColorType::UnsignedInt248:
             return 4;
         #ifndef MAGNUM_TARGET_GLES2
-        case ImageType::Float32UnsignedInt248Rev:
+        case ColorType::Float32UnsignedInt248Rev:
             return 8;
         #endif
     }
 
     switch(format) {
-        case ImageFormat::Red:
+        case ColorFormat::Red:
         #ifndef MAGNUM_TARGET_GLES2
-        case ImageFormat::RedInteger:
+        case ColorFormat::RedInteger:
         #endif
         #ifndef MAGNUM_TARGET_GLES
-        case ImageFormat::Green:
-        case ImageFormat::Blue:
-        case ImageFormat::GreenInteger:
-        case ImageFormat::BlueInteger:
+        case ColorFormat::Green:
+        case ColorFormat::Blue:
+        case ColorFormat::GreenInteger:
+        case ColorFormat::BlueInteger:
         #endif
         #ifdef MAGNUM_TARGET_GLES2
-        case ImageFormat::Luminance:
+        case ColorFormat::Luminance:
         #endif
             return 1*size;
-        case ImageFormat::RG:
+        case ColorFormat::RG:
         #ifndef MAGNUM_TARGET_GLES2
-        case ImageFormat::RGInteger:
+        case ColorFormat::RGInteger:
         #endif
         #ifdef MAGNUM_TARGET_GLES2
-        case ImageFormat::LuminanceAlpha:
+        case ColorFormat::LuminanceAlpha:
         #endif
             return 2*size;
-        case ImageFormat::RGB:
+        case ColorFormat::RGB:
         #ifndef MAGNUM_TARGET_GLES2
-        case ImageFormat::RGBInteger:
+        case ColorFormat::RGBInteger:
         #endif
         #ifndef MAGNUM_TARGET_GLES
-        case ImageFormat::BGR:
-        case ImageFormat::BGRInteger:
+        case ColorFormat::BGR:
+        case ColorFormat::BGRInteger:
         #endif
             return 3*size;
-        case ImageFormat::RGBA:
+        case ColorFormat::RGBA:
         #ifndef MAGNUM_TARGET_GLES2
-        case ImageFormat::RGBAInteger:
+        case ColorFormat::RGBAInteger:
         #endif
         #ifndef MAGNUM_TARGET_GLES3
-        case ImageFormat::BGRA:
+        case ColorFormat::BGRA:
         #endif
         #ifndef MAGNUM_TARGET_GLES
-        case ImageFormat::BGRAInteger:
+        case ColorFormat::BGRAInteger:
         #endif
             return 4*size;
 
         /* Handled above */
-        case ImageFormat::DepthComponent:
+        case ColorFormat::DepthComponent:
         #ifndef MAGNUM_TARGET_GLES3
-        case ImageFormat::StencilIndex:
+        case ColorFormat::StencilIndex:
         #endif
-        case ImageFormat::DepthStencil:
+        case ColorFormat::DepthStencil:
             CORRADE_ASSERT_UNREACHABLE();
     }
 

src/AbstractImage.h

@@ -58,13 +58,13 @@ class MAGNUM_EXPORT AbstractImage {
          *
          * @see pixelSize() const
          */
-        static std::size_t pixelSize(ImageFormat format, ImageType type);
+        static std::size_t pixelSize(ColorFormat format, ColorType type);
 
         /** @brief Format of pixel data */
-        constexpr ImageFormat format() const { return _format; }
+        constexpr ColorFormat format() const { return _format; }
 
         /** @brief Data type of pixel data */
-        constexpr ImageType type() const { return _type; }
+        constexpr ColorType type() const { return _type; }
 
         /**
          * @brief Pixel size (in bytes)
@@ -79,7 +79,7 @@ class MAGNUM_EXPORT AbstractImage {
          * @param format            Format of pixel data
          * @param type              Data type of pixel data
          */
-        constexpr explicit AbstractImage(ImageFormat format, ImageType type): _format(format), _type(type) {}
+        constexpr explicit AbstractImage(ColorFormat format, ColorType type): _format(format), _type(type) {}
 
         /* GCC > 4.5 needs to have `= default` in class body, otherwise can't
            use constexpr */
@@ -94,8 +94,8 @@ class MAGNUM_EXPORT AbstractImage {
     #else
     protected:
     #endif
-        ImageFormat _format;
-        ImageType _type;
+        ColorFormat _format;
+        ColorType _type;
 };
 
 #ifdef CORRADE_GCC45_COMPATIBILITY

src/AbstractShaderProgram.cpp

@@ -76,8 +76,8 @@ AbstractShaderProgram::UniformMatrix3x4dvImplementation AbstractShaderProgram::u
 AbstractShaderProgram::UniformMatrix4x3dvImplementation AbstractShaderProgram::uniformMatrix4x3dvImplementation = &AbstractShaderProgram::uniformImplementationDefault;
 #endif
 
-Int AbstractShaderProgram::maxSupportedVertexAttributeCount() {
-    GLint& value = Context::current()->state().shaderProgram->maxSupportedVertexAttributeCount;
+Int AbstractShaderProgram::maxVertexAttributes() {
+    GLint& value = Context::current()->state().shaderProgram->maxVertexAttributes;
 
     /* Get the value, if not already cached */
     if(value == 0)
@@ -86,6 +86,153 @@ Int AbstractShaderProgram::maxSupportedVertexAttributeCount() {
     return value;
 }
 
+#ifndef MAGNUM_TARGET_GLES
+Int AbstractShaderProgram::maxAtomicCounterBufferSize() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_atomic_counters>())
+        return 0;
+
+    GLint& value = Context::current()->state().shaderProgram->maxAtomicCounterBufferSize;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_ATOMIC_COUNTER_BUFFER_SIZE, &value);
+
+    return value;
+}
+
+Int AbstractShaderProgram::maxComputeSharedMemorySize() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::compute_shader>())
+        return 0;
+
+    GLint& value = Context::current()->state().shaderProgram->maxComputeSharedMemorySize;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_COMPUTE_SHARED_MEMORY_SIZE, &value);
+
+    return value;
+}
+
+Int AbstractShaderProgram::maxComputeWorkGroupInvocations() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::compute_shader>())
+        return 0;
+
+    GLint& value = Context::current()->state().shaderProgram->maxComputeWorkGroupInvocations;
+
+    /** @todo Fix when glLoadGen has `GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS` */
+    if(value == 0)
+        glGetIntegerv(/*GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS*/0x90EB, &value);
+
+    return value;
+}
+
+Int AbstractShaderProgram::maxImageUnits() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_image_load_store>())
+        return 0;
+
+    GLint& value = Context::current()->state().shaderProgram->maxImageUnits;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_IMAGE_UNITS, &value);
+
+    return value;
+}
+
+Int AbstractShaderProgram::maxImageSamples() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_image_load_store>())
+        return 0;
+
+    GLint& value = Context::current()->state().shaderProgram->maxImageSamples;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_IMAGE_SAMPLES, &value);
+
+    return value;
+}
+
+Int AbstractShaderProgram::maxCombinedShaderOutputResources() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_storage_buffer_object>() || !Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_image_load_store>())
+        return 0;
+
+    GLint& value = Context::current()->state().shaderProgram->maxCombinedShaderOutputResources;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_COMBINED_SHADER_OUTPUT_RESOURCES, &value);
+
+    return value;
+}
+
+Long AbstractShaderProgram::maxShaderStorageBlockSize() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_storage_buffer_object>())
+        return 0;
+
+    GLint64& value = Context::current()->state().shaderProgram->maxShaderStorageBlockSize;
+
+    if(value == 0)
+        glGetInteger64v(GL_MAX_SHADER_STORAGE_BLOCK_SIZE, &value);
+
+    return value;
+}
+#endif
+
+#ifndef MAGNUM_TARGET_GLES2
+Int AbstractShaderProgram::maxUniformBlockSize() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::uniform_buffer_object>())
+        return 0;
+    #endif
+
+    GLint& value = Context::current()->state().shaderProgram->maxUniformBlockSize;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_UNIFORM_BLOCK_SIZE, &value);
+
+    return value;
+}
+#endif
+
+#ifndef MAGNUM_TARGET_GLES
+Int AbstractShaderProgram::maxUniformLocations() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>())
+        return 0;
+
+    GLint& value = Context::current()->state().shaderProgram->maxUniformLocations;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_UNIFORM_LOCATIONS, &value);
+
+    return value;
+}
+#endif
+
+#ifndef MAGNUM_TARGET_GLES2
+Int AbstractShaderProgram::minTexelOffset() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::gpu_shader4>())
+        return 0;
+    #endif
+
+    GLint& value = Context::current()->state().shaderProgram->minTexelOffset;
+
+    if(value == 0)
+        glGetIntegerv(GL_MIN_PROGRAM_TEXEL_OFFSET, &value);
+
+    return value;
+}
+
+Int AbstractShaderProgram::maxTexelOffset() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::gpu_shader4>())
+        return 0;
+    #endif
+
+    GLint& value = Context::current()->state().shaderProgram->maxTexelOffset;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_PROGRAM_TEXEL_OFFSET, &value);
+
+    return value;
+}
+#endif
+
 AbstractShaderProgram::AbstractShaderProgram(): _id(glCreateProgram()) {}
 
 AbstractShaderProgram::AbstractShaderProgram(AbstractShaderProgram&& other) noexcept: _id(other._id) {

src/AbstractShaderProgram.h

@@ -149,6 +149,7 @@ bindFragmentDataLocationIndexed(NormalOutput, 1, "normal");
 // Link...
 @endcode
 
+@see @ref Mesh::maxVertexAttributes(), @ref AbstractFramebuffer::maxDrawBuffers()
 @requires_gl30 %Extension @extension{EXT,gpu_shader4} for using
     bindFragmentDataLocation().
 @requires_gl33 %Extension @extension{ARB,blend_func_extended} for using
@@ -180,6 +181,7 @@ Int transformationUniform = uniformLocation("transformation");
 Int projectionUniform = uniformLocation("projection");
 @endcode
 
+@see @ref maxUniformLocations()
 @requires_gl43 %Extension @extension{ARB,explicit_uniform_location} for
     explicit uniform location instead of using uniformLocation().
 @requires_gl Explicit uniform location is not supported in OpenGL ES. Use
@@ -203,6 +205,7 @@ setUniform(DiffuseTextureUniform, DiffuseTextureLayer);
 setUniform(SpecularTextureUniform, SpecularTextureLayer);
 @endcode
 
+@see @ref Shader::maxTextureImageUnits()
 @requires_gl42 %Extension @extension{ARB,shading_language_420pack} for explicit
     texture layer binding instead of using setUniform(Int, Int).
 @requires_gl Explicit texture layer binding is not supported in OpenGL ES. Use
@@ -272,7 +275,7 @@ See @ref types for more information, only types with GLSL equivalent can be used
 @section AbstractShaderProgram-performance-optimization Performance optimizations
 
 The engine tracks currently used shader program to avoid unnecessary calls to
-@fn_gl{UseProgram}. %Shader limits (such as maxSupportedVertexAttributeCount())
+@fn_gl{UseProgram}. %Shader limits (such as @ref maxVertexAttributes())
 are cached, so repeated queries don't result in repeated @fn_gl{Get} calls.
 
 If extension @extension{ARB,separate_shader_objects} or
@@ -283,8 +286,11 @@ setUniform() documentation for more information.
 To achieve least state changes, set all uniforms in one run -- method chaining
 comes in handy.
 
+@see @ref portability-shaders
+
 @todo Compiling and linking more than one shader in parallel, then checking
     status, should be faster -- https://twitter.com/g_truc/status/352778836657700866
+@todo `GL_NUM_{PROGRAM,SHADER}_BINARY_FORMATS` + `GL_{PROGRAM,SHADER}_BINARY_FORMATS` (vector), (@extension{ARB,ES2_compatibility})
  */
 class MAGNUM_EXPORT AbstractShaderProgram {
     friend class Context;
@@ -297,9 +303,152 @@ class MAGNUM_EXPORT AbstractShaderProgram {
          *
          * The result is cached, repeated queries don't result in repeated
          * OpenGL calls.
-         * @see Attribute, @fn_gl{Get} with @def_gl{MAX_VERTEX_ATTRIBS}
+         * @see @ref Mesh::maxVertexAttributes(),
+         *      @ref AbstractShaderProgram::Attribute, @fn_gl{Get} with
+         *      @def_gl{MAX_VERTEX_ATTRIBS}
+         */
+        static Int maxVertexAttributes();
+
+        /**
+         * @copydoc maxVertexAttributes()
+         * @deprecated Use @ref Magnum::AbstractShaderProgram::maxVertexAttributes() "maxVertexAttributes()"
+         *      instead.
+         */
+        static Int maxSupportedVertexAttributeCount() { return maxVertexAttributes(); }
+
+        #ifndef MAGNUM_TARGET_GLES
+        /**
+         * @brief Max supported atomic counter buffer size
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_atomic_counters} is
+         * not available, returns `0`.
+         * @requires_gl Atomic counters are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_ATOMIC_COUNTER_BUFFER_SIZE}
          */
-        static Int maxSupportedVertexAttributeCount();
+        static Int maxAtomicCounterBufferSize();
+
+        /**
+         * @brief Max supported compute shared memory size
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,compute_shader} is not
+         * available, returns `0`.
+         * @requires_gl Compute shaders are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_COMPUTE_SHARED_MEMORY_SIZE}
+         */
+        static Int maxComputeSharedMemorySize();
+
+        /**
+         * @brief Max supported compute work group invocation count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,compute_shader} is not
+         * available, returns `0`.
+         * @requires_gl Compute shaders are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_COMPUTE_WORK_GROUP_INVOCATIONS}
+         */
+        static Int maxComputeWorkGroupInvocations();
+
+        /** @todo MAX_COMPUTE_WORK_GROUP_COUNT, MAX_COMPUTE_WORK_GROUP_SIZE */
+
+        /**
+         * @brief Max supported image unit count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_image_load_store}
+         * is not available, returns `0`.
+         * @requires_gl Image load/store is not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_IMAGE_UNITS}
+         */
+        static Int maxImageUnits();
+
+        /**
+         * @brief Max supported image sample count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_image_load_store}
+         * is not available, returns `0`.
+         * @requires_gl Image load/store is not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_IMAGE_SAMPLES}
+         */
+        static Int maxImageSamples();
+
+        /**
+         * @brief Max supported combined shader output resource count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If neither @extension{ARB,shader_image_load_store}
+         * nor @extension{ARB,shader_storage_buffer_object} extension is
+         * available, returns `0`.
+         * @requires_gl Image load/store is not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_COMBINED_SHADER_OUTPUT_RESOURCES}
+         */
+        static Int maxCombinedShaderOutputResources();
+
+        /**
+         * @brief Max supported shader storage block size
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_storage_buffer_object}
+         * is not available, returns `0`.
+         * @requires_gl Shader storage is not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_SHADER_STORAGE_BLOCK_SIZE}
+         */
+        static Long maxShaderStorageBlockSize();
+        #endif
+
+        #ifndef MAGNUM_TARGET_GLES2
+        /**
+         * @brief Max supported uniform block size
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,uniform_buffer_object}
+         * is not available, returns `0`.
+         * @requires_gles30 Uniform blocks are not available in OpenGL ES 2.0.
+         * @see @fn_gl{Get} with @def_gl{MAX_UNIFORM_BLOCK_SIZE}
+         */
+        static Int maxUniformBlockSize();
+        #endif
+
+        #ifndef MAGNUM_TARGET_GLES
+        /**
+         * @brief Max supported explicit uniform location count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,explicit_uniform_location}
+         * is not available, returns `0`.
+         * @requires_gl Explicit uniform location is not supported in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_UNIFORM_LOCATIONS}
+         */
+        static Int maxUniformLocations();
+        #endif
+
+        #ifndef MAGNUM_TARGET_GLES2
+        /**
+         * @brief Min supported program texel offset
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{EXT,gpu_shader4} is not
+         * available, returns `0`.
+         * @requires_gles30 Texture lookup with offset is not available in
+         *      OpenGL ES 2.0.
+         * @see @fn_gl{Get} with @def_gl{MIN_PROGRAM_TEXEL_OFFSET}
+         */
+        static Int minTexelOffset();
+
+        /**
+         * @brief Max supported program texel offset
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{EXT,gpu_shader4} is not
+         * available, returns `0`.
+         * @requires_gles30 Texture lookup with offset is not available in
+         *      OpenGL ES 2.0.
+         * @see @fn_gl{Get} with @def_gl{MAX_PROGRAM_TEXEL_OFFSET}
+         */
+        static Int maxTexelOffset();
+        #endif
 
         /**
          * @brief Constructor
@@ -945,8 +1094,8 @@ class MAGNUM_EXPORT AbstractShaderProgram {
 @brief Base struct for attribute location and type
 
 Template parameter @p location is vertex attribute location, number between `0`
-and maxSupportedVertexAttributeCount(). To ensure compatibility, you should
-always have vertex attribute with location `0`.
+and @ref maxVertexAttributes(). To ensure compatibility, you should always have
+vertex attribute with location `0`.
 
 Template parameter @p T is the type which is used for shader attribute, e.g.
 @ref Vector4i for `ivec4`. DataType is type of passed data when adding vertex

src/AbstractTexture.cpp

@@ -26,10 +26,11 @@
 
 #include "Buffer.h"
 #include "BufferImage.h"
+#include "ColorFormat.h"
 #include "Context.h"
 #include "Extensions.h"
 #include "Image.h"
-#include "ImageFormat.h"
+#include "Shader.h"
 #include "TextureFormat.h"
 #include "Implementation/State.h"
 #include "Implementation/TextureState.h"
@@ -80,10 +81,49 @@ AbstractTexture::SubImage3DImplementation AbstractTexture::subImage3DImplementat
 AbstractTexture::InvalidateImageImplementation AbstractTexture::invalidateImageImplementation = &AbstractTexture::invalidateImageImplementationNoOp;
 AbstractTexture::InvalidateSubImageImplementation AbstractTexture::invalidateSubImageImplementation = &AbstractTexture::invalidateSubImageImplementationNoOp;
 
-Int AbstractTexture::maxSupportedLayerCount() {
-    return Context::current()->state().texture->maxSupportedLayerCount;
+Int AbstractTexture::maxLayers() { return Shader::maxCombinedTextureImageUnits(); }
+
+#ifndef MAGNUM_TARGET_GLES
+Int AbstractTexture::maxColorSamples() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::texture_multisample>())
+        return 0;
+
+    GLint& value = Context::current()->state().texture->maxColorSamples;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_COLOR_TEXTURE_SAMPLES, &value);
+
+    return value;
+}
+
+Int AbstractTexture::maxDepthSamples() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::texture_multisample>())
+        return 0;
+
+    GLint& value = Context::current()->state().texture->maxDepthSamples;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_DEPTH_TEXTURE_SAMPLES, &value);
+
+    return value;
 }
 
+Int AbstractTexture::maxIntegerSamples() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::texture_multisample>())
+        return 0;
+
+    GLint& value = Context::current()->state().texture->maxIntegerSamples;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_INTEGER_SAMPLES, &value);
+
+    return value;
+}
+#endif
+
 void AbstractTexture::destroy() {
     /* Moved out */
     if(!_id) return;
@@ -184,7 +224,7 @@ void AbstractTexture::bindInternal() {
         return;
 
     /* Set internal layer as active if not already */
-    const GLint internalLayer = textureState->maxSupportedLayerCount-1;
+    const GLint internalLayer = maxLayers()-1;
     if(textureState->currentLayer != internalLayer)
         glActiveTexture(GL_TEXTURE0 + (textureState->currentLayer = internalLayer));
 
@@ -194,13 +234,6 @@ void AbstractTexture::bindInternal() {
 }
 
 void AbstractTexture::initializeContextBasedFunctionality(Context& context) {
-    Implementation::TextureState* const textureState = context.state().texture;
-    GLint& value = textureState->maxSupportedLayerCount;
-
-    /* Get the value and resize bindings array */
-    glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &value);
-    textureState->bindings.resize(value);
-
     #ifndef MAGNUM_TARGET_GLES
     if(context.isExtensionSupported<Extensions::GL::EXT::direct_state_access>()) {
         Debug() << "AbstractTexture: using" << Extensions::GL::EXT::direct_state_access::string() << "features";
@@ -247,10 +280,12 @@ void AbstractTexture::initializeContextBasedFunctionality(Context& context) {
             storage3DImplementation = &AbstractTexture::storageImplementationDefault;
         }
     }
+    #else
+    static_cast<void>(context);
     #endif
 }
 
-ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat internalFormat) {
+ColorFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat internalFormat) {
     switch(internalFormat) {
         case TextureFormat::Red:
         #ifndef MAGNUM_TARGET_GLES2
@@ -270,7 +305,7 @@ ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         case TextureFormat::CompressedRedRtgc1:
         case TextureFormat::CompressedSignedRedRgtc1:
         #endif
-            return ImageFormat::Red;
+            return ColorFormat::Red;
 
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::R8UI:
@@ -279,7 +314,7 @@ ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         case TextureFormat::R16I:
         case TextureFormat::R32UI:
         case TextureFormat::R32I:
-            return ImageFormat::RedInteger;
+            return ColorFormat::RedInteger;
         #endif
 
         case TextureFormat::RG:
@@ -300,7 +335,7 @@ ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         case TextureFormat::CompressedRGRgtc2:
         case TextureFormat::CompressedSignedRGRgtc2:
         #endif
-            return ImageFormat::RG;
+            return ColorFormat::RG;
 
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::RG8UI:
@@ -309,7 +344,7 @@ ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         case TextureFormat::RG16I:
         case TextureFormat::RG32UI:
         case TextureFormat::RG32I:
-            return ImageFormat::RGInteger;
+            return ColorFormat::RGInteger;
         #endif
 
         case TextureFormat::RGB:
@@ -352,7 +387,7 @@ ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         case TextureFormat::CompressedRGBBptcUnsignedFloat:
         case TextureFormat::CompressedRGBBptcSignedFloat:
         #endif
-            return ImageFormat::RGB;
+            return ColorFormat::RGB;
 
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::RGB8UI:
@@ -361,7 +396,7 @@ ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         case TextureFormat::RGB16I:
         case TextureFormat::RGB32UI:
         case TextureFormat::RGB32I:
-            return ImageFormat::RGBInteger;
+            return ColorFormat::RGBInteger;
         #endif
 
         case TextureFormat::RGBA:
@@ -397,7 +432,7 @@ ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         case TextureFormat::CompressedRGBABptcUnorm:
         case TextureFormat::CompressedSRGBAlphaBptcUnorm:
         #endif
-            return ImageFormat::RGBA;
+            return ColorFormat::RGBA;
 
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::RGBA8UI:
@@ -407,14 +442,14 @@ ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         case TextureFormat::RGBA32UI:
         case TextureFormat::RGBA32I:
         case TextureFormat::RGB10A2UI:
-            return ImageFormat::RGBAInteger;
+            return ColorFormat::RGBAInteger;
         #endif
 
         #ifdef MAGNUM_TARGET_GLES2
         case TextureFormat::Luminance:
-            return ImageFormat::Luminance;
+            return ColorFormat::Luminance;
         case TextureFormat::LuminanceAlpha:
-            return ImageFormat::LuminanceAlpha;
+            return ColorFormat::LuminanceAlpha;
         #endif
 
         case TextureFormat::DepthComponent:
@@ -426,11 +461,11 @@ ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::DepthComponent32F:
         #endif
-            return ImageFormat::DepthComponent;
+            return ColorFormat::DepthComponent;
 
         #ifndef MAGNUM_TARGET_GLES
         case TextureFormat::StencilIndex8:
-            return ImageFormat::StencilIndex;
+            return ColorFormat::StencilIndex;
         #endif
 
         case TextureFormat::DepthStencil:
@@ -438,13 +473,13 @@ ImageFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::Depth32FStencil8:
         #endif
-            return ImageFormat::DepthStencil;
+            return ColorFormat::DepthStencil;
     }
 
     CORRADE_ASSERT_UNREACHABLE();
 }
 
-ImageType AbstractTexture::imageTypeForInternalFormat(const TextureFormat internalFormat) {
+ColorType AbstractTexture::imageTypeForInternalFormat(const TextureFormat internalFormat) {
     switch(internalFormat) {
         case TextureFormat::Red:
         case TextureFormat::RG:
@@ -485,7 +520,7 @@ ImageType AbstractTexture::imageTypeForInternalFormat(const TextureFormat intern
         case TextureFormat::CompressedRGBABptcUnorm:
         case TextureFormat::CompressedSRGBAlphaBptcUnorm:
         #endif
-            return ImageType::UnsignedByte;
+            return ColorType::UnsignedByte;
 
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::R8Snorm:
@@ -500,7 +535,7 @@ ImageType AbstractTexture::imageTypeForInternalFormat(const TextureFormat intern
         case TextureFormat::CompressedSignedRedRgtc1:
         case TextureFormat::CompressedSignedRGRgtc2:
         #endif
-            return ImageType::Byte;
+            return ColorType::Byte;
         #endif
 
         #ifndef MAGNUM_TARGET_GLES
@@ -522,7 +557,7 @@ ImageType AbstractTexture::imageTypeForInternalFormat(const TextureFormat intern
         #ifndef MAGNUM_TARGET_GLES
         case TextureFormat::RGBA12: /**< @todo really? */
         #endif
-            return ImageType::UnsignedShort;
+            return ColorType::UnsignedShort;
 
         #ifndef MAGNUM_TARGET_GLES2
         #ifndef MAGNUM_TARGET_GLES
@@ -535,7 +570,7 @@ ImageType AbstractTexture::imageTypeForInternalFormat(const TextureFormat intern
         case TextureFormat::RG16I:
         case TextureFormat::RGB16I:
         case TextureFormat::RGBA16I:
-            return ImageType::Short;
+            return ColorType::Short;
         #endif
 
         #ifndef MAGNUM_TARGET_GLES2
@@ -543,19 +578,19 @@ ImageType AbstractTexture::imageTypeForInternalFormat(const TextureFormat intern
         case TextureFormat::RG16F:
         case TextureFormat::RGB16F:
         case TextureFormat::RGBA16F:
-            return ImageType::HalfFloat;
+            return ColorType::HalfFloat;
 
         case TextureFormat::R32UI:
         case TextureFormat::RG32UI:
         case TextureFormat::RGB32UI:
         case TextureFormat::RGBA32UI:
-            return ImageType::UnsignedInt;
+            return ColorType::UnsignedInt;
 
         case TextureFormat::R32I:
         case TextureFormat::RG32I:
         case TextureFormat::RGB32I:
         case TextureFormat::RGBA32I:
-            return ImageType::Int;
+            return ColorType::Int;
 
         case TextureFormat::R32F:
         case TextureFormat::RG32F:
@@ -565,24 +600,24 @@ ImageType AbstractTexture::imageTypeForInternalFormat(const TextureFormat intern
         case TextureFormat::CompressedRGBBptcUnsignedFloat:
         case TextureFormat::CompressedRGBBptcSignedFloat:
         #endif
-            return ImageType::Float;
+            return ColorType::Float;
         #endif
 
         #ifndef MAGNUM_TARGET_GLES
         case TextureFormat::R3B3G2:
-            return ImageType::UnsignedByte332;
+            return ColorType::UnsignedByte332;
         case TextureFormat::RGB4:
-            return ImageType::UnsignedShort4444;
+            return ColorType::UnsignedShort4444;
         #endif
 
         #ifndef MAGNUM_TARGET_GLES
         case TextureFormat::RGB5:
         #endif
         case TextureFormat::RGB5A1:
-            return ImageType::UnsignedShort5551;
+            return ColorType::UnsignedShort5551;
 
         case TextureFormat::RGB565:
-            return ImageType::UnsignedShort565;
+            return ColorType::UnsignedShort565;
 
         #ifndef MAGNUM_TARGET_GLES3
         case TextureFormat::RGB10:
@@ -591,42 +626,42 @@ ImageType AbstractTexture::imageTypeForInternalFormat(const TextureFormat intern
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::RGB10A2UI:
         #endif
-            return ImageType::UnsignedInt2101010Rev; /**< @todo Rev for all? */
+            return ColorType::UnsignedInt2101010Rev; /**< @todo Rev for all? */
 
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::R11FG11FB10F:
-            return ImageType::UnsignedInt10F11F11FRev;
+            return ColorType::UnsignedInt10F11F11FRev;
         case TextureFormat::RGB9E5:
-            return ImageType::UnsignedInt5999Rev;
+            return ColorType::UnsignedInt5999Rev;
         #endif
 
         case TextureFormat::DepthComponent16:
-            return ImageType::UnsignedShort;
+            return ColorType::UnsignedShort;
 
         case TextureFormat::DepthComponent:
         case TextureFormat::DepthComponent24:
         #ifndef MAGNUM_TARGET_GLES3
         case TextureFormat::DepthComponent32:
         #endif
-            return ImageType::UnsignedInt;
+            return ColorType::UnsignedInt;
 
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::DepthComponent32F:
-            return ImageType::Float;
+            return ColorType::Float;
         #endif
 
         #ifndef MAGNUM_TARGET_GLES
         case TextureFormat::StencilIndex8:
-            return ImageType::UnsignedByte;
+            return ColorType::UnsignedByte;
         #endif
 
         case TextureFormat::DepthStencil:
         case TextureFormat::Depth24Stencil8:
-            return ImageType::UnsignedInt248;
+            return ColorType::UnsignedInt248;
 
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::Depth32FStencil8:
-            return ImageType::Float32UnsignedInt248Rev;
+            return ColorType::Float32UnsignedInt248Rev;
         #endif
     }
 
@@ -681,8 +716,8 @@ void AbstractTexture::getLevelParameterImplementationDSA(GLenum target, GLint le
 void AbstractTexture::storageImplementationFallback(const GLenum target, const GLsizei levels, const TextureFormat internalFormat, const Math::Vector<1, GLsizei>& size) {
     CORRADE_INTERNAL_ASSERT(target == GL_TEXTURE_1D);
 
-    const ImageFormat format = imageFormatForInternalFormat(internalFormat);
-    const ImageType type = imageTypeForInternalFormat(internalFormat);
+    const ColorFormat format = imageFormatForInternalFormat(internalFormat);
+    const ColorType type = imageTypeForInternalFormat(internalFormat);
 
     for(GLsizei level = 0; level != levels; ++level) {
         (this->*image1DImplementation)(target, level, internalFormat, Math::max(Math::Vector<1, GLsizei>(1), size >> level), format, type, nullptr);
@@ -709,8 +744,8 @@ void AbstractTexture::storageImplementationDSA(GLenum target, GLsizei levels, Te
 #endif
 
 void AbstractTexture::storageImplementationFallback(const GLenum target, const GLsizei levels, const TextureFormat internalFormat, const Vector2i& size) {
-    const ImageFormat format = imageFormatForInternalFormat(internalFormat);
-    const ImageType type = imageTypeForInternalFormat(internalFormat);
+    const ColorFormat format = imageFormatForInternalFormat(internalFormat);
+    const ColorType type = imageTypeForInternalFormat(internalFormat);
 
     /* Common code for classic types */
     #ifndef MAGNUM_TARGET_GLES
@@ -771,8 +806,8 @@ void AbstractTexture::storageImplementationDSA(GLenum target, GLsizei levels, Te
 #endif
 
 void AbstractTexture::storageImplementationFallback(GLenum target, GLsizei levels, TextureFormat internalFormat, const Vector3i& size) {
-    const ImageFormat format = imageFormatForInternalFormat(internalFormat);
-    const ImageType type = imageTypeForInternalFormat(internalFormat);
+    const ColorFormat format = imageFormatForInternalFormat(internalFormat);
+    const ColorType type = imageTypeForInternalFormat(internalFormat);
 
     /* Common code for classic type */
     #ifndef MAGNUM_TARGET_GLES2
@@ -824,16 +859,16 @@ void AbstractTexture::storageImplementationDSA(GLenum target, GLsizei levels, Te
 #endif
 
 #ifndef MAGNUM_TARGET_GLES
-void AbstractTexture::getImageImplementationDefault(const GLenum target, const GLint level, const ImageFormat format, const ImageType type, const std::size_t, GLvoid* const data) {
+void AbstractTexture::getImageImplementationDefault(const GLenum target, const GLint level, const ColorFormat format, const ColorType type, const std::size_t, GLvoid* const data) {
     bindInternal();
     glGetTexImage(target, level, GLenum(format), GLenum(type), data);
 }
 
-void AbstractTexture::getImageImplementationDSA(const GLenum target, const GLint level, const ImageFormat format, const ImageType type, const std::size_t, GLvoid* const data) {
+void AbstractTexture::getImageImplementationDSA(const GLenum target, const GLint level, const ColorFormat format, const ColorType type, const std::size_t, GLvoid* const data) {
     glGetTextureImageEXT(_id, target, level, GLenum(format), GLenum(type), data);
 }
 
-void AbstractTexture::getImageImplementationRobustness(const GLenum target, const GLint level, const ImageFormat format, const ImageType type, const std::size_t dataSize, GLvoid* const data) {
+void AbstractTexture::getImageImplementationRobustness(const GLenum target, const GLint level, const ColorFormat format, const ColorType type, const std::size_t dataSize, GLvoid* const data) {
     #ifndef MAGNUM_TARGET_GLES
     bindInternal();
     glGetnTexImageARB(target, level, GLenum(format), GLenum(type), dataSize, data);
@@ -850,28 +885,28 @@ void AbstractTexture::getImageImplementationRobustness(const GLenum target, cons
 #endif
 
 #ifndef MAGNUM_TARGET_GLES
-void AbstractTexture::imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Math::Vector<1, GLsizei>& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Math::Vector<1, GLsizei>& size, ColorFormat format, ColorType type, const GLvoid* data) {
     bindInternal();
     glTexImage1D(target, level, static_cast<GLint>(internalFormat), size[0], 0, static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 
-void AbstractTexture::imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Math::Vector<1, GLsizei>& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Math::Vector<1, GLsizei>& size, ColorFormat format, ColorType type, const GLvoid* data) {
     glTextureImage1DEXT(_id, target, level, GLint(internalFormat), size[0], 0, static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 #endif
 
-void AbstractTexture::imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Vector2i& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Vector2i& size, ColorFormat format, ColorType type, const GLvoid* data) {
     bindInternal();
     glTexImage2D(target, level, GLint(internalFormat), size.x(), size.y(), 0, static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 
 #ifndef MAGNUM_TARGET_GLES
-void AbstractTexture::imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Vector2i& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Vector2i& size, ColorFormat format, ColorType type, const GLvoid* data) {
     glTextureImage2DEXT(_id, target, level, GLint(internalFormat), size.x(), size.y(), 0, static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 #endif
 
-void AbstractTexture::imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Vector3i& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Vector3i& size, ColorFormat format, ColorType type, const GLvoid* data) {
     bindInternal();
     /** @todo Get some extension wrangler instead to avoid linker errors to glTexImage3D() on ES2 */
     #ifndef MAGNUM_TARGET_GLES2
@@ -888,34 +923,34 @@ void AbstractTexture::imageImplementationDefault(GLenum target, GLint level, Tex
 }
 
 #ifndef MAGNUM_TARGET_GLES
-void AbstractTexture::imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Vector3i& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Vector3i& size, ColorFormat format, ColorType type, const GLvoid* data) {
     glTextureImage3DEXT(_id, target, level, GLint(internalFormat), size.x(), size.y(), size.z(), 0, static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 #endif
 
 #ifndef MAGNUM_TARGET_GLES
-void AbstractTexture::subImageImplementationDefault(GLenum target, GLint level, const Math::Vector<1, GLint>& offset, const Math::Vector<1, GLsizei>& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::subImageImplementationDefault(GLenum target, GLint level, const Math::Vector<1, GLint>& offset, const Math::Vector<1, GLsizei>& size, ColorFormat format, ColorType type, const GLvoid* data) {
     bindInternal();
     glTexSubImage1D(target, level, offset[0], size[0], static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 
-void AbstractTexture::subImageImplementationDSA(GLenum target, GLint level, const Math::Vector<1, GLint>& offset, const Math::Vector<1, GLsizei>& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::subImageImplementationDSA(GLenum target, GLint level, const Math::Vector<1, GLint>& offset, const Math::Vector<1, GLsizei>& size, ColorFormat format, ColorType type, const GLvoid* data) {
     glTextureSubImage1DEXT(_id, target, level, offset[0], size[0], static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 #endif
 
-void AbstractTexture::subImageImplementationDefault(GLenum target, GLint level, const Vector2i& offset, const Vector2i& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::subImageImplementationDefault(GLenum target, GLint level, const Vector2i& offset, const Vector2i& size, ColorFormat format, ColorType type, const GLvoid* data) {
     bindInternal();
     glTexSubImage2D(target, level, offset.x(), offset.y(), size.x(), size.y(), static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 
 #ifndef MAGNUM_TARGET_GLES
-void AbstractTexture::subImageImplementationDSA(GLenum target, GLint level, const Vector2i& offset, const Vector2i& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::subImageImplementationDSA(GLenum target, GLint level, const Vector2i& offset, const Vector2i& size, ColorFormat format, ColorType type, const GLvoid* data) {
     glTextureSubImage2DEXT(_id, target, level, offset.x(), offset.y(), size.x(), size.y(), static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 #endif
 
-void AbstractTexture::subImageImplementationDefault(GLenum target, GLint level, const Vector3i& offset, const Vector3i& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::subImageImplementationDefault(GLenum target, GLint level, const Vector3i& offset, const Vector3i& size, ColorFormat format, ColorType type, const GLvoid* data) {
     bindInternal();
     /** @todo Get some extension wrangler instead to avoid linker errors to glTexSubImage3D() on ES2 */
     #ifndef MAGNUM_TARGET_GLES2
@@ -932,7 +967,7 @@ void AbstractTexture::subImageImplementationDefault(GLenum target, GLint level,
 }
 
 #ifndef MAGNUM_TARGET_GLES
-void AbstractTexture::subImageImplementationDSA(GLenum target, GLint level, const Vector3i& offset, const Vector3i& size, ImageFormat format, ImageType type, const GLvoid* data) {
+void AbstractTexture::subImageImplementationDSA(GLenum target, GLint level, const Vector3i& offset, const Vector3i& size, ColorFormat format, ColorType type, const GLvoid* data) {
     glTextureSubImage3DEXT(_id, target, level, offset.x(), offset.y(), offset.z(), size.x(), size.y(), size.z(), static_cast<GLenum>(format), static_cast<GLenum>(type), data);
 }
 #endif

src/AbstractTexture.h

@@ -53,9 +53,9 @@ information and usage examples.
 The engine tracks currently bound textures in all available layers to avoid
 unnecessary calls to @fn_gl{ActiveTexture} and @fn_gl{BindTexture}. %Texture
 configuration functions use dedicated highest available texture layer to not
-affect active bindings in user layers. %Texture limits (such as
-maxSupportedLayerCount()) are cached, so repeated queries don't result in
-repeated @fn_gl{Get} calls.
+affect active bindings in user layers. %Texture limits and
+implementation-defined values (such as @ref maxColorSamples()) are cached, so
+repeated queries don't result in repeated @fn_gl{Get} calls.
 
 If extension @extension{EXT,direct_state_access} is available, bind() uses DSA
 function to avoid unnecessary calls to @fn_gl{ActiveTexture}. Also all texture
@@ -96,6 +96,10 @@ do nothing.
 @todo Move constructor/assignment - how to avoid creation of empty texture and
     then deleting it immediately?
 @todo ES2 - proper support for pixel unpack buffer when extension is in headers
+@todo `GL_MAX_3D_TEXTURE_SIZE`, `GL_MAX_ARRAY_TEXTURE_LAYERS`, `GL_MAX_CUBE_MAP_TEXTURE_SIZE`, `GL_MAX_RECTANGLE_TEXTURE_SIZE`, `GL_MAX_TEXTURE_SIZE`, `GL_MAX_TEXTURE_BUFFER_SIZE` enable them only where it makes sense?
+@todo `GL_MAX_TEXTURE_LOD_BIAS` when `TEXTURE_LOD_BIAS` is implemented
+@todo `GL_NUM_COMPRESSED_TEXTURE_FORMATS` when compressed textures are implemented
+@todo `GL_MAX_SAMPLE_MASK_WORDS` when @extension{ARB,texture_multisample} is done
 */
 class MAGNUM_EXPORT AbstractTexture {
     friend class Context;
@@ -105,12 +109,53 @@ class MAGNUM_EXPORT AbstractTexture {
          * @brief Max supported layer count
          *
          * The result is cached, repeated queries don't result in repeated
-         * OpenGL calls.
-         * @see @ref AbstractShaderProgram-subclassing, bind(Int),
-         *      @fn_gl{Get} with @def_gl{MAX_COMBINED_TEXTURE_IMAGE_UNITS},
-         *      @fn_gl{ActiveTexture}
+         * OpenGL calls. This function is in fact alias to
+         * @ref Shader::maxCombinedTextureImageUnits().
+         * @see @ref bind(Int)
          */
-        static Int maxSupportedLayerCount();
+        static Int maxLayers();
+
+        /**
+         * @copybrief maxLayers()
+         * @deprecated Use @ref Magnum::AbstractTexture::maxLayers() "maxLayers()"
+         *      instead.
+         */
+        static Int maxSupportedLayerCount() { return maxLayers(); }
+
+        #ifndef MAGNUM_TARGET_GLES
+        /**
+         * @brief Max supported color sample count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,texture_multisample} is
+         * not available, returns `0`.
+         * @see @fn_gl{Get} with @def_gl{MAX_COLOR_TEXTURE_SAMPLES}
+         * @requires_gl Multisample textures are not available in OpenGL ES.
+         */
+        static Int maxColorSamples();
+
+        /**
+         * @brief Max supported depth sample count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,texture_multisample} is
+         * not available, returns `0`.
+         * @see @fn_gl{Get} with @def_gl{MAX_DEPTH_TEXTURE_SAMPLES}
+         * @requires_gl Multisample textures are not available in OpenGL ES.
+         */
+        static Int maxDepthSamples();
+
+        /**
+         * @brief Max supported integer sample count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,texture_multisample} is
+         * not available, returns `0`.
+         * @see @fn_gl{Get} with @def_gl{MAX_INTEGER_SAMPLES}
+         * @requires_gl Multisample textures are not available in OpenGL ES.
+         */
+        static Int maxIntegerSamples();
+        #endif
 
         /** @brief Copying is not allowed */
         AbstractTexture(const AbstractTexture&) = delete;
@@ -131,11 +176,10 @@ class MAGNUM_EXPORT AbstractTexture {
          * @brief Bind texture for rendering
          *
          * Sets current texture as active in given layer. The layer must be
-         * between 0 and maxSupportedLayerCount(). Note that only one texture
-         * can be bound to given layer. If @extension{EXT,direct_state_access}
-         * is not available, the layer is made active before binding the
-         * texture.
-         * @see @fn_gl{ActiveTexture}, @fn_gl{BindTexture} or
+         * between 0 and @ref maxLayers(). Note that only one texture can be
+         * bound to given layer. If @extension{EXT,direct_state_access} is not
+         * available, the layer is made active before binding the texture.
+         * @see @ref maxLayers(), @fn_gl{ActiveTexture}, @fn_gl{BindTexture} or
          *      @fn_gl_extension{BindMultiTexture,EXT,direct_state_access}
          */
         void bind(Int layer);
@@ -210,7 +254,7 @@ class MAGNUM_EXPORT AbstractTexture {
          * greater than `1.0f` for anisotropic filtering. If
          * @extension{EXT,direct_state_access} is not available, the texture
          * is bound to some layer before the operation.
-         * @see maxSupportedAnisotropy(), @fn_gl{ActiveTexture},
+         * @see @ref Sampler::maxAnisotropy(), @fn_gl{ActiveTexture},
          *      @fn_gl{BindTexture} and @fn_gl{TexParameter} or
          *      @fn_gl_extension{TextureParameter,EXT,direct_state_access} with
          *      @def_gl{TEXTURE_MAX_ANISOTROPY_EXT}
@@ -354,52 +398,52 @@ class MAGNUM_EXPORT AbstractTexture {
         static Storage3DImplementation storage3DImplementation;
 
         #ifndef MAGNUM_TARGET_GLES
-        typedef void(AbstractTexture::*GetImageImplementation)(GLenum, GLint, ImageFormat, ImageType, std::size_t, GLvoid*);
-        void MAGNUM_LOCAL getImageImplementationDefault(GLenum target, GLint level, ImageFormat format, ImageType type, std::size_t dataSize, GLvoid* data);
-        void MAGNUM_LOCAL getImageImplementationDSA(GLenum target, GLint level, ImageFormat format, ImageType type, std::size_t dataSize, GLvoid* data);
-        void MAGNUM_LOCAL getImageImplementationRobustness(GLenum target, GLint level, ImageFormat format, ImageType type, std::size_t dataSize, GLvoid* data);
+        typedef void(AbstractTexture::*GetImageImplementation)(GLenum, GLint, ColorFormat, ColorType, std::size_t, GLvoid*);
+        void MAGNUM_LOCAL getImageImplementationDefault(GLenum target, GLint level, ColorFormat format, ColorType type, std::size_t dataSize, GLvoid* data);
+        void MAGNUM_LOCAL getImageImplementationDSA(GLenum target, GLint level, ColorFormat format, ColorType type, std::size_t dataSize, GLvoid* data);
+        void MAGNUM_LOCAL getImageImplementationRobustness(GLenum target, GLint level, ColorFormat format, ColorType type, std::size_t dataSize, GLvoid* data);
         static MAGNUM_LOCAL GetImageImplementation getImageImplementation;
         #endif
 
         #ifndef MAGNUM_TARGET_GLES
-        typedef void(AbstractTexture::*Image1DImplementation)(GLenum, GLint, TextureFormat, const Math::Vector<1, GLsizei>&, ImageFormat, ImageType, const GLvoid*);
-        void MAGNUM_LOCAL imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Math::Vector<1, GLsizei>& size, ImageFormat format, ImageType type, const GLvoid* data);
-        void MAGNUM_LOCAL imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Math::Vector<1, GLsizei>& size, ImageFormat format, ImageType type, const GLvoid* data);
+        typedef void(AbstractTexture::*Image1DImplementation)(GLenum, GLint, TextureFormat, const Math::Vector<1, GLsizei>&, ColorFormat, ColorType, const GLvoid*);
+        void MAGNUM_LOCAL imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Math::Vector<1, GLsizei>& size, ColorFormat format, ColorType type, const GLvoid* data);
+        void MAGNUM_LOCAL imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Math::Vector<1, GLsizei>& size, ColorFormat format, ColorType type, const GLvoid* data);
         static Image1DImplementation image1DImplementation;
         #endif
 
-        typedef void(AbstractTexture::*Image2DImplementation)(GLenum, GLint, TextureFormat, const Vector2i&, ImageFormat, ImageType, const GLvoid*);
-        void MAGNUM_LOCAL imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Vector2i& size, ImageFormat format, ImageType type, const GLvoid* data);
+        typedef void(AbstractTexture::*Image2DImplementation)(GLenum, GLint, TextureFormat, const Vector2i&, ColorFormat, ColorType, const GLvoid*);
+        void MAGNUM_LOCAL imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Vector2i& size, ColorFormat format, ColorType type, const GLvoid* data);
         #ifndef MAGNUM_TARGET_GLES
-        void MAGNUM_LOCAL imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Vector2i& size, ImageFormat format, ImageType type, const GLvoid* data);
+        void MAGNUM_LOCAL imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Vector2i& size, ColorFormat format, ColorType type, const GLvoid* data);
         #endif
         static Image2DImplementation image2DImplementation;
 
-        typedef void(AbstractTexture::*Image3DImplementation)(GLenum, GLint, TextureFormat, const Vector3i&, ImageFormat, ImageType, const GLvoid*);
-        void MAGNUM_LOCAL imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Vector3i& size, ImageFormat format, ImageType type, const GLvoid* data);
+        typedef void(AbstractTexture::*Image3DImplementation)(GLenum, GLint, TextureFormat, const Vector3i&, ColorFormat, ColorType, const GLvoid*);
+        void MAGNUM_LOCAL imageImplementationDefault(GLenum target, GLint level, TextureFormat internalFormat, const Vector3i& size, ColorFormat format, ColorType type, const GLvoid* data);
         #ifndef MAGNUM_TARGET_GLES
-        void MAGNUM_LOCAL imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Vector3i& size, ImageFormat format, ImageType type, const GLvoid* data);
+        void MAGNUM_LOCAL imageImplementationDSA(GLenum target, GLint level, TextureFormat internalFormat, const Vector3i& size, ColorFormat format, ColorType type, const GLvoid* data);
         #endif
         static Image3DImplementation image3DImplementation;
 
         #ifndef MAGNUM_TARGET_GLES
-        typedef void(AbstractTexture::*SubImage1DImplementation)(GLenum, GLint, const Math::Vector<1, GLint>&, const Math::Vector<1, GLsizei>&, ImageFormat, ImageType, const GLvoid*);
-        void MAGNUM_LOCAL subImageImplementationDefault(GLenum target, GLint level, const Math::Vector<1, GLint>& offset, const Math::Vector<1, GLsizei>& size, ImageFormat format, ImageType type, const GLvoid* data);
-        void MAGNUM_LOCAL subImageImplementationDSA(GLenum target, GLint level, const Math::Vector<1, GLint>& offset, const Math::Vector<1, GLsizei>& size, ImageFormat format, ImageType type, const GLvoid* data);
+        typedef void(AbstractTexture::*SubImage1DImplementation)(GLenum, GLint, const Math::Vector<1, GLint>&, const Math::Vector<1, GLsizei>&, ColorFormat, ColorType, const GLvoid*);
+        void MAGNUM_LOCAL subImageImplementationDefault(GLenum target, GLint level, const Math::Vector<1, GLint>& offset, const Math::Vector<1, GLsizei>& size, ColorFormat format, ColorType type, const GLvoid* data);
+        void MAGNUM_LOCAL subImageImplementationDSA(GLenum target, GLint level, const Math::Vector<1, GLint>& offset, const Math::Vector<1, GLsizei>& size, ColorFormat format, ColorType type, const GLvoid* data);
         static SubImage1DImplementation subImage1DImplementation;
         #endif
 
-        typedef void(AbstractTexture::*SubImage2DImplementation)(GLenum, GLint, const Vector2i&, const Vector2i&, ImageFormat, ImageType, const GLvoid*);
-        void MAGNUM_LOCAL subImageImplementationDefault(GLenum target, GLint level, const Vector2i& offset, const Vector2i& size, ImageFormat format, ImageType type, const GLvoid* data);
+        typedef void(AbstractTexture::*SubImage2DImplementation)(GLenum, GLint, const Vector2i&, const Vector2i&, ColorFormat, ColorType, const GLvoid*);
+        void MAGNUM_LOCAL subImageImplementationDefault(GLenum target, GLint level, const Vector2i& offset, const Vector2i& size, ColorFormat format, ColorType type, const GLvoid* data);
         #ifndef MAGNUM_TARGET_GLES
-        void MAGNUM_LOCAL subImageImplementationDSA(GLenum target, GLint level, const Vector2i& offset, const Vector2i& size, ImageFormat format, ImageType type, const GLvoid* data);
+        void MAGNUM_LOCAL subImageImplementationDSA(GLenum target, GLint level, const Vector2i& offset, const Vector2i& size, ColorFormat format, ColorType type, const GLvoid* data);
         #endif
         static SubImage2DImplementation subImage2DImplementation;
 
-        typedef void(AbstractTexture::*SubImage3DImplementation)(GLenum, GLint, const Vector3i&, const Vector3i&, ImageFormat, ImageType, const GLvoid*);
-        void MAGNUM_LOCAL subImageImplementationDefault(GLenum target, GLint level, const Vector3i& offset, const Vector3i& size, ImageFormat format, ImageType type, const GLvoid* data);
+        typedef void(AbstractTexture::*SubImage3DImplementation)(GLenum, GLint, const Vector3i&, const Vector3i&, ColorFormat, ColorType, const GLvoid*);
+        void MAGNUM_LOCAL subImageImplementationDefault(GLenum target, GLint level, const Vector3i& offset, const Vector3i& size, ColorFormat format, ColorType type, const GLvoid* data);
         #ifndef MAGNUM_TARGET_GLES
-        void MAGNUM_LOCAL subImageImplementationDSA(GLenum target, GLint level, const Vector3i& offset, const Vector3i& size, ImageFormat format, ImageType type, const GLvoid* data);
+        void MAGNUM_LOCAL subImageImplementationDSA(GLenum target, GLint level, const Vector3i& offset, const Vector3i& size, ColorFormat format, ColorType type, const GLvoid* data);
         #endif
         static SubImage3DImplementation subImage3DImplementation;
 
@@ -419,8 +463,8 @@ class MAGNUM_EXPORT AbstractTexture {
 
         void MAGNUM_LOCAL destroy();
         void MAGNUM_LOCAL move();
-        ImageFormat MAGNUM_LOCAL imageFormatForInternalFormat(TextureFormat internalFormat);
-        ImageType MAGNUM_LOCAL imageTypeForInternalFormat(TextureFormat internalFormat);
+        ColorFormat MAGNUM_LOCAL imageFormatForInternalFormat(TextureFormat internalFormat);
+        ColorType MAGNUM_LOCAL imageTypeForInternalFormat(TextureFormat internalFormat);
 
         GLuint _id;
 };

src/Buffer.cpp

@@ -78,6 +78,69 @@ void Buffer::initializeContextBasedFunctionality(Context& context) {
     #endif
 }
 
+#ifndef MAGNUM_TARGET_GLES
+Int Buffer::minMapAlignment() {
+    GLint& value = Context::current()->state().buffer->minMapAlignment;
+
+    if(value == 0)
+        glGetIntegerv(GL_MIN_MAP_BUFFER_ALIGNMENT, &value);
+
+    return value;
+}
+
+Int Buffer::maxAtomicCounterBindings() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_atomic_counters>())
+        return 0;
+
+    GLint& value = Context::current()->state().buffer->maxAtomicCounterBindings;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_ATOMIC_COUNTER_BUFFER_BINDINGS, &value);
+
+    return value;
+}
+
+Int Buffer::maxShaderStorageBindings() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_storage_buffer_object>())
+        return 0;
+
+    GLint& value = Context::current()->state().buffer->maxShaderStorageBindings;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS, &value);
+
+    return value;
+}
+
+Int Buffer::shaderStorageOffsetAlignment() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_storage_buffer_object>())
+        return 0;
+
+    GLint& value = Context::current()->state().buffer->shaderStorageOffsetAlignment;
+
+    if(value == 0)
+        glGetIntegerv(GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT, &value);
+
+    return value;
+}
+#endif
+
+#ifndef MAGNUM_TARGET_GLES2
+Int Buffer::maxUniformBindings() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::uniform_buffer_object>())
+        return 0;
+    #endif
+
+    GLint& value = Context::current()->state().buffer->maxUniformBindings;
+
+    if(value == 0)
+        glGetIntegerv(GL_MAX_UNIFORM_BUFFER_BINDINGS, &value);
+
+    return value;
+}
+#endif
+
 Buffer::Buffer(Buffer::Target targetHint): _targetHint(targetHint)
     #ifdef CORRADE_TARGET_NACL
     , _mappedBuffer(nullptr)

src/Buffer.h

@@ -106,7 +106,9 @@ The engine tracks currently bound buffers to avoid unnecessary calls to
 @fn_gl{BindBuffer}. If the buffer is already bound to some target, functions
 copy(), setData(), setSubData(), map(), flushMappedRange() and unmap() use
 that target instead of binding the buffer to some specific target. You can
-also use setTargetHint() to possibly reduce unnecessary rebinding.
+also use setTargetHint() to possibly reduce unnecessary rebinding. %Buffer
+limits and implementation-defined values (such as @ref maxVertexAttributeBindings())
+are cached, so repeated queries don't result in repeated @fn_gl{Get} calls.
 
 If extension @extension{EXT,direct_state_access} is available, functions
 copy(), setData(), setSubData(), map(), flushMappedRange() and unmap() use DSA
@@ -428,6 +430,73 @@ class MAGNUM_EXPORT Buffer {
          */
         typedef Containers::EnumSet<MapFlag, GLbitfield> MapFlags;
 
+        #ifndef MAGNUM_TARGET_GLES
+        /**
+         * @brief Minimal supported mapping alignment
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls.
+         * @see @ref map(), @fn_gl{Get} with @def_gl{MIN_MAP_BUFFER_ALIGNMENT}
+         * @requires_gl No minimal value is specified for OpenGL ES.
+         */
+        static Int minMapAlignment();
+
+        /**
+         * @brief Max supported atomic counter buffer binding count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_atomic_counters} is
+         * not available, returns `0`.
+         * @see @fn_gl{Get} with @def_gl{MAX_ATOMIC_COUNTER_BUFFER_BINDINGS}
+         * @requires_gl Atomic counters are not available in OpenGL ES.
+         */
+        static Int maxAtomicCounterBindings();
+
+        /**
+         * @brief Max supported shader storage buffer binding count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_storage_buffer_object}
+         * is not available, returns `0`.
+         * @see @fn_gl{Get} with @def_gl{MAX_SHADER_STORAGE_BUFFER_BINDINGS}
+         * @requires_gl Atomic counters are not available in OpenGL ES.
+         */
+        static Int maxShaderStorageBindings();
+
+        /**
+         * @brief Alignment of shader storage buffer binding offset
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_storage_buffer_object}
+         * is not available, returns `0`.
+         * @see @fn_gl{Get} with @def_gl{SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT}
+         * @requires_gl Atomic counters are not available in OpenGL ES.
+         */
+        static Int shaderStorageOffsetAlignment();
+        #endif
+
+        #ifndef MAGNUM_TARGET_GLES2
+        /**
+         * @brief Max supported uniform buffer binding count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,uniform_buffer_object}
+         * is not available, returns `0`.
+         * @see @fn_gl{Get} with @def_gl{MAX_UNIFORM_BUFFER_BINDINGS}
+         * @requires_gles30 Uniform blocks are not available in OpenGL ES 2.0.
+         */
+        static Int maxUniformBindings();
+        #endif
+
+        /**
+         * @brief Max supported vertex buffer binding count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls.
+         * @see @fn_gl{Get} with @def_gl{MAX_VERTEX_ATTRIB_BINDINGS}
+         */
+        static Int maxVertexAttributeBindings();
+
         /**
          * @brief Unbind any buffer from given target
          * @param target    %Target
@@ -724,8 +793,9 @@ class MAGNUM_EXPORT Buffer {
          * before the operation.
          * @deprecated Prefer to use @ref Magnum::Buffer::map(GLintptr, GLsizeiptr, MapFlags) "map(GLintptr, GLsizeiptr, MapFlags)"
          *      instead, as it has more complete set of features.
-         * @see unmap(), setTargetHint(), @fn_gl{BindBuffer} and @fn_gl{MapBuffer}
-         *      or @fn_gl_extension{MapNamedBuffer,EXT,direct_state_access}
+         * @see @ref minMapAlignment(), @ref unmap(), @ref setTargetHint(),
+         *      @fn_gl{BindBuffer} and @fn_gl{MapBuffer} or
+         *      @fn_gl_extension{MapNamedBuffer,EXT,direct_state_access}
          * @requires_es_extension %Extension @es_extension{OES,mapbuffer} in
          *      OpenGL ES 2.0, use @ref Magnum::Buffer::map(GLintptr, GLsizeiptr, MapFlags) "map(GLintptr, GLsizeiptr, MapFlags)"
          *      in OpenGL ES 3.0 instead.
@@ -767,7 +837,8 @@ class MAGNUM_EXPORT Buffer {
          * If @extension{EXT,direct_state_access} is not available and the
          * buffer is not already bound somewhere, it is bound to hinted target
          * before the operation.
-         * @see flushMappedRange(), unmap(), map(MapAccess), setTargetHint(), @fn_gl{BindBuffer}
+         * @see @ref minMapAlignment(), @ref flushMappedRange(), @ref unmap(),
+         *      @ref map(MapAccess), @ref setTargetHint(), @fn_gl{BindBuffer}
          *      and @fn_gl{MapBufferRange} or @fn_gl_extension{MapNamedBufferRange,EXT,direct_state_access}
          * @requires_gl30 %Extension @extension{ARB,map_buffer_range}
          * @requires_gles30 %Extension @es_extension{EXT,map_buffer_range}

src/BufferImage.cpp

@@ -27,7 +27,7 @@
 namespace Magnum {
 
 #ifndef MAGNUM_TARGET_GLES2
-template<UnsignedInt dimensions> void BufferImage<dimensions>::setData(const typename DimensionTraits<Dimensions, Int>::VectorType& size, ImageFormat format, ImageType type, const void* data, Buffer::Usage usage) {
+template<UnsignedInt dimensions> void BufferImage<dimensions>::setData(const typename DimensionTraits<Dimensions, Int>::VectorType& size, ColorFormat format, ColorType type, const void* data, Buffer::Usage usage) {
     _format = format;
     _type = type;
     _size = size;

src/BufferImage.h

@@ -58,7 +58,7 @@ template<UnsignedInt dimensions> class MAGNUM_EXPORT BufferImage: public Abstrac
          * Dimensions and buffer are empty, call setData() to fill the image
          * with data.
          */
-        explicit BufferImage(ImageFormat format, ImageType type): AbstractImage(format, type) {
+        explicit BufferImage(ColorFormat format, ColorType type): AbstractImage(format, type) {
             _buffer.setTargetHint(Buffer::Target::PixelPack);
         }
 
@@ -81,7 +81,7 @@ template<UnsignedInt dimensions> class MAGNUM_EXPORT BufferImage: public Abstrac
          *
          * @see Buffer::setData()
          */
-        void setData(const typename DimensionTraits<Dimensions, Int>::VectorType& size, ImageFormat format, ImageType type, const void* data, Buffer::Usage usage);
+        void setData(const typename DimensionTraits<Dimensions, Int>::VectorType& size, ColorFormat format, ColorType type, const void* data, Buffer::Usage usage);
 
     private:
         Math::Vector<Dimensions, Int> _size;

src/CMakeLists.txt

@@ -57,12 +57,12 @@ set(Magnum_SRCS
     AbstractTexture.cpp
     AbstractShaderProgram.cpp
     Buffer.cpp
+    ColorFormat.cpp
     Context.cpp
     DebugMarker.cpp
     DefaultFramebuffer.cpp
     Framebuffer.cpp
     Image.cpp
-    ImageFormat.cpp
     Mesh.cpp
     MeshView.cpp
     OpenGL.cpp
@@ -113,6 +113,7 @@ set(Magnum_HEADERS
     Array.h
     Buffer.h
     Color.h
+    ColorFormat.h
     Context.h
     CubeMapTexture.h
     DebugMarker.h
@@ -143,18 +144,18 @@ set(Magnum_HEADERS
 
     magnumVisibility.h)
 
-# Desktop-only headers
+# Desktop-only headers and libraries
 if(NOT TARGET_GLES)
     set(Magnum_HEADERS ${Magnum_HEADERS}
         BufferTexture.h
         CubeMapTextureArray.h)
+    set(Magnum_OBJECTS ${Magnum_OBJECTS} $<TARGET_OBJECTS:MagnumGLLoadGenObjects>)
 endif()
 
 # Not-ES2 headers
 if(NOT TARGET_GLES2)
     set(Magnum_HEADERS ${Magnum_HEADERS}
         BufferImage.h)
-    set(Magnum_OBJECTS ${Magnum_OBJECTS} $<TARGET_OBJECTS:MagnumGLLoadGenObjects>)
 endif()
 
 # Files shared between main library and math unit test library

src/ColorFormat.cpp

@@ -22,16 +22,16 @@
     DEALINGS IN THE SOFTWARE.
 */
 
-#include "ImageFormat.h"
+#include "ColorFormat.h"
 
 #include <Utility/Debug.h>
 
 namespace Magnum {
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
-Debug operator<<(Debug debug, ImageFormat value) {
+Debug operator<<(Debug debug, const ColorFormat value) {
     switch(value) {
-        #define _c(value) case ImageFormat::value: return debug << "ImageFormat::" #value;
+        #define _c(value) case ColorFormat::value: return debug << "ColorFormat::" #value;
         _c(Red)
         #ifndef MAGNUM_TARGET_GLES
         _c(Green)
@@ -74,12 +74,12 @@ Debug operator<<(Debug debug, ImageFormat value) {
         #undef _c
     }
 
-    return debug << "ImageFormat::(invalid)";
+    return debug << "ColorFormat::(invalid)";
 }
 
-Debug operator<<(Debug debug, ImageType value) {
+Debug operator<<(Debug debug, const ColorType value) {
     switch(value) {
-        #define _c(value) case ImageType::value: return debug << "ImageType::" #value;
+        #define _c(value) case ColorType::value: return debug << "ColorType::" #value;
         _c(UnsignedByte)
         #ifndef MAGNUM_TARGET_GLES2
         _c(Byte)
@@ -127,7 +127,7 @@ Debug operator<<(Debug debug, ImageType value) {
         #undef _c
     }
 
-    return debug << "ImageType::(invalid)";
+    return debug << "ColorType::(invalid)";
 }
 #endif
 

src/ColorFormat.h

@@ -0,0 +1,481 @@
+#ifndef Magnum_ColorFormat_h
+#define Magnum_ColorFormat_h
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+/** @file
+ * @brief Enum Magnum::ColorFormat, Magnum::ColorType
+ */
+
+#include "Magnum.h"
+#include "OpenGL.h"
+#include "magnumVisibility.h"
+
+namespace Magnum {
+
+/**
+@brief Format of image data
+
+Note that some formats can be used only for framebuffer reading (using
+AbstractFramebuffer::read()) and some only for texture data (using Texture::setImage()
+and others).
+@see Image, ImageReference, BufferImage, Trade::ImageData
+*/
+enum class ColorFormat: GLenum {
+    /**
+     * Floating-point red channel.
+     * @requires_gles30 For texture data only, extension @es_extension{EXT,texture_rg}.
+     * @requires_es_extension For framebuffer reading, extension @es_extension{EXT,texture_rg}.
+     */
+    #ifndef MAGNUM_TARGET_GLES2
+    Red = GL_RED,
+    #else
+    Red = GL_RED_EXT,
+    #endif
+
+    #ifndef MAGNUM_TARGET_GLES
+    /**
+     * Floating-point green channel.
+     * @requires_gl Only @ref Magnum::ColorFormat "ColorFormat::Red" is
+     *      available in OpenGL ES.
+     */
+    Green = GL_GREEN,
+
+    /**
+     * Floating-point blue channel.
+     * @requires_gl Only @ref Magnum::ColorFormat "ColorFormat::Red" is
+     *      available in OpenGL ES.
+     */
+    Blue = GL_BLUE,
+    #endif
+
+    #if defined(MAGNUM_TARGET_GLES2) || defined(DOXYGEN_GENERATING_OUTPUT)
+    /**
+     * Floating-point luminance channel. The value is used for all RGB
+     * channels.
+     * @deprecated Included for compatibility reasons only, use
+     *      @ref Magnum::ColorFormat "ColorFormat::Red" instead.
+     * @requires_gles20 Not available in ES 3.0 or desktop OpenGL. Use
+     *      @ref Magnum::ColorFormat "ColorFormat::Red" instead.
+     */
+    Luminance = GL_LUMINANCE,
+    #endif
+
+    /**
+     * Floating-point red and green channel.
+     * @requires_gl30 %Extension @extension{ARB,texture_rg} and @extension{EXT,texture_integer}
+     * @requires_gles30 For texture data only, extension @es_extension{EXT,texture_rg}.
+     * @requires_es_extension For framebuffer reading, extension @es_extension{EXT,texture_rg}.
+     */
+    #ifndef MAGNUM_TARGET_GLES2
+    RG = GL_RG,
+    #else
+    RG = GL_RG_EXT,
+    #endif
+
+    #if defined(MAGNUM_TARGET_GLES2) || defined(DOXYGEN_GENERATING_OUTPUT)
+    /**
+     * Floating-point luminance and alpha channel. First value is used for all
+     * RGB channels, second value is used for alpha channel.
+     * @deprecated Included for compatibility reasons only, use
+     *      @ref Magnum::ColorFormat "ColorFormat::RG" instead.
+     * @requires_gles20 Not available in ES 3.0 or desktop OpenGL. Use
+     *      @ref Magnum::ColorFormat "ColorFormat::RG" instead.
+     */
+    LuminanceAlpha = GL_LUMINANCE_ALPHA,
+    #endif
+
+    /**
+     * Floating-point RGB.
+     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
+     */
+    RGB = GL_RGB,
+
+    /** Floating-point RGBA. */
+    RGBA = GL_RGBA,
+
+    #ifndef MAGNUM_TARGET_GLES
+    /**
+     * Floating-point BGR.
+     * @requires_gl Only RGB component ordering is available in OpenGL ES.
+     */
+    BGR = GL_BGR,
+    #endif
+
+    #ifndef MAGNUM_TARGET_GLES3
+    /**
+     * Floating-point BGRA.
+     * @requires_es_extension %Extension @es_extension{EXT,read_format_bgra}
+     *      for framebuffer reading, extension @es_extension{APPLE,texture_format_BGRA8888}
+     *      or @es_extension{EXT,texture_format_BGRA8888} for texture data.
+     */
+    #ifndef MAGNUM_TARGET_GLES
+    BGRA = GL_BGRA,
+    #else
+    BGRA = GL_BGRA_EXT,
+    #endif
+    #endif
+
+    #ifndef MAGNUM_TARGET_GLES2
+    /**
+     * Integer red channel.
+     * @requires_gl30 %Extension @extension{EXT,texture_integer}
+     * @requires_gles30 Only floating-point image data are available in OpenGL
+     *      ES 2.0.
+     */
+    RedInteger = GL_RED_INTEGER,
+
+    #ifndef MAGNUM_TARGET_GLES
+    /**
+     * Integer green channel.
+     * @requires_gl30 %Extension @extension{EXT,texture_integer}
+     * @requires_gl Only @ref Magnum::ColorFormat "ColorFormat::RedInteger"
+     *      is available in OpenGL ES 3.0, only floating-point image data are
+     *      available in OpenGL ES 2.0.
+     */
+    GreenInteger = GL_GREEN_INTEGER,
+
+    /**
+     * Integer blue channel.
+     * @requires_gl30 %Extension @extension{EXT,texture_integer}
+     * @requires_gl Only @ref Magnum::ColorFormat "ColorFormat::RedInteger" is
+     *      available in OpenGL ES 3.0, only floating-point image data are
+     *      available in OpenGL ES 2.0.
+     */
+    BlueInteger = GL_BLUE_INTEGER,
+    #endif
+
+    /**
+     * Integer red and green channel.
+     * @requires_gl30 %Extension @extension{ARB,texture_rg} and @extension{EXT,texture_integer}
+     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
+     * @requires_gles30 For texture data only, only floating-point image data
+     *      are available in OpenGL ES 2.0.
+     */
+    RGInteger = GL_RG_INTEGER,
+
+    /**
+     * Integer RGB.
+     * @requires_gl30 %Extension @extension{EXT,texture_integer}
+     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
+     * @requires_gles30 For texture data only, only floating-point image data
+     *      are available in OpenGL ES 2.0.
+     */
+    RGBInteger = GL_RGB_INTEGER,
+
+    /**
+     * Integer RGBA.
+     * @requires_gl30 %Extension @extension{EXT,texture_integer}
+     * @requires_gles30 Only floating-point image data are available in OpenGL
+     *      ES 2.0.
+     */
+    RGBAInteger = GL_RGBA_INTEGER,
+
+    #ifndef MAGNUM_TARGET_GLES
+    /**
+     * Integer BGR.
+     * @requires_gl30 %Extension @extension{EXT,texture_integer}
+     * @requires_gl Only @ref Magnum::ColorFormat "ColorFormat::RGBInteger" is
+     *      available in OpenGL ES 3.0, only floating-point image data are
+     *      available in OpenGL ES 2.0.
+     */
+    BGRInteger = GL_BGR_INTEGER,
+
+    /**
+     * Integer BGRA.
+     * @requires_gl30 %Extension @extension{EXT,texture_integer}
+     * @requires_gl Only @ref Magnum::ColorFormat "ColorFormat::RGBAInteger" is
+     *      available in OpenGL ES 3.0, only floating-point image data are
+     *      available in OpenGL ES 2.0.
+     */
+    BGRAInteger = GL_BGRA_INTEGER,
+    #endif
+    #endif
+
+    /**
+     * Depth component.
+     * @requires_gles30 For texture data only, extension @es_extension{ANGLE,depth_texture}.
+     * @requires_es_extension For framebuffer reading only, extension
+     *      @es_extension2{NV,read_depth,GL_NV_read_depth_stencil}.
+     */
+    DepthComponent = GL_DEPTH_COMPONENT,
+
+    #ifndef MAGNUM_TARGET_GLES3
+    /**
+     * Stencil index.
+     * @requires_gl44 %Extension @extension{ARB,texture_stencil8} for texture
+     *      data, otherwise for framebuffer reading only.
+     * @requires_es_extension %Extension @es_extension2{NV,read_stencil,GL_NV_read_depth_stencil},
+     *      for framebuffer reading only.
+     * @todo Where to get GL_STENCIL_INDEX in ES?
+     */
+    #ifndef MAGNUM_TARGET_GLES
+    StencilIndex = GL_STENCIL_INDEX,
+    #else
+    StencilIndex = 0x1901,
+    #endif
+    #endif
+
+    /**
+     * Depth and stencil.
+     * @requires_gl30 %Extension @extension{ARB,framebuffer_object}
+     * @requires_gles30 For texture data only, extension @es_extension{OES,packed_depth_stencil}.
+     * @requires_es_extension For framebuffer reading only, extension
+     *      @es_extension2{NV,read_depth_stencil,GL_NV_read_depth_stencil}.
+     */
+    #ifndef MAGNUM_TARGET_GLES2
+    DepthStencil = GL_DEPTH_STENCIL
+    #else
+    DepthStencil = GL_DEPTH_STENCIL_OES
+    #endif
+};
+
+/**
+@brief Type of image data
+
+Note that some formats can be used only for framebuffer reading (using
+AbstractFramebuffer::read()) and some only for texture data (using Texture::setImage()
+and others).
+@see Image, ImageReference, BufferImage, Trade::ImageData
+*/
+enum class ColorType: GLenum {
+    /** Each component unsigned byte. */
+    UnsignedByte = GL_UNSIGNED_BYTE,
+
+    #ifndef MAGNUM_TARGET_GLES2
+    /**
+     * Each component signed byte.
+     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
+     * @requires_gles30 For texture data only, only @ref Magnum::ColorType "ColorType::UnsignedByte"
+     *      is available in OpenGL ES 2.0.
+     */
+    Byte = GL_BYTE,
+    #endif
+
+    /**
+     * Each component unsigned short.
+     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
+     * @requires_gles30 For texture data only, extension @es_extension{OES,depth_texture}
+     *      or @es_extension{ANGLE,depth_texture}.
+     */
+    UnsignedShort = GL_UNSIGNED_SHORT,
+
+    #ifndef MAGNUM_TARGET_GLES2
+    /**
+     * Each component signed short.
+     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
+     * @requires_gles30 For texture data only, only @ref Magnum::ColorType "ColorType::UnsignedShort"
+     *      is available in OpenGL ES 2.0.
+     */
+    Short = GL_SHORT,
+    #endif
+
+    /**
+     * Each component unsigned int.
+     * @requires_gles30 Can't be used for framebuffer reading in OpenGL ES 2.0.
+     * @requires_gles30 For texture data only, extension @es_extension{OES,depth_texture}
+     *      or @es_extension{ANGLE,depth_texture}.
+     */
+    UnsignedInt = GL_UNSIGNED_INT,
+
+    #ifndef MAGNUM_TARGET_GLES2
+    /**
+     * Each component signed int.
+     * @requires_gles30 Only @ref Magnum::ColorType "ColorType::UnsignedInt"
+     *      is available in OpenGL ES 2.0.
+     */
+    Int = GL_INT,
+    #endif
+
+    /**
+     * Each component half float.
+     * @requires_gl30 %Extension @extension{NV,half_float} / @extension{ARB,half_float_pixel}
+     * @requires_gles30 For texture data only, extension
+     *      @es_extension2{OES,texture_half_float,OES_texture_float}.
+     */
+    #ifndef MAGNUM_TARGET_GLES2
+    HalfFloat = GL_HALF_FLOAT,
+    #else
+    HalfFloat = GL_HALF_FLOAT_OES,
+    #endif
+
+    /**
+     * Each component float.
+     * @requires_gles30 For texture data only, extension @es_extension{OES,texture_float}.
+     */
+    Float = GL_FLOAT,
+
+    #ifndef MAGNUM_TARGET_GLES
+    /**
+     * RGB, unsigned byte, red and green component 3bit, blue component 2bit.
+     * @requires_gl Packed 12bit types are not available in OpenGL ES.
+     */
+    UnsignedByte332 = GL_UNSIGNED_BYTE_3_3_2,
+
+    /**
+     * BGR, unsigned byte, red and green component 3bit, blue component 2bit.
+     * @requires_gl Packed 12bit types are not available in OpenGL ES.
+     */
+    UnsignedByte233Rev = GL_UNSIGNED_BYTE_2_3_3_REV,
+    #endif
+
+    /**
+     * RGB, unsigned byte, red and blue component 5bit, green 6bit.
+     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
+     */
+    UnsignedShort565 = GL_UNSIGNED_SHORT_5_6_5,
+
+    #ifndef MAGNUM_TARGET_GLES
+    /**
+     * BGR, unsigned short, red and blue 5bit, green 6bit.
+     * @requires_gl Only @ref Magnum::ColorType "ColorType::RGB565" is
+     *      available in OpenGL ES.
+     */
+    UnsignedShort565Rev = GL_UNSIGNED_SHORT_5_6_5_REV,
+    #endif
+
+    /**
+     * RGBA, unsigned short, each component 4bit.
+     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
+     */
+    UnsignedShort4444 = GL_UNSIGNED_SHORT_4_4_4_4,
+
+    #ifndef MAGNUM_TARGET_GLES3
+    /**
+     * ABGR, unsigned short, each component 4bit.
+     * @requires_es_extension For framebuffer reading only, extension
+     *      @es_extension{EXT,read_format_bgra}.
+     */
+    #ifndef MAGNUM_TARGET_GLES
+    UnsignedShort4444Rev = GL_UNSIGNED_SHORT_4_4_4_4_REV,
+    #else
+    UnsignedShort4444Rev = GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT,
+    #endif
+    #endif
+
+    /**
+     * RGBA, unsigned short, each RGB component 5bit, alpha component 1bit.
+     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
+     */
+    UnsignedShort5551 = GL_UNSIGNED_SHORT_5_5_5_1,
+
+    #ifndef MAGNUM_TARGET_GLES3
+    /**
+     * ABGR, unsigned short, each RGB component 5bit, alpha component 1bit.
+     * @requires_es_extension For framebuffer reading only, extension
+     *      @es_extension{EXT,read_format_bgra}.
+     */
+    #ifndef MAGNUM_TARGET_GLES
+    UnsignedShort1555Rev = GL_UNSIGNED_SHORT_1_5_5_5_REV,
+    #else
+    UnsignedShort1555Rev = GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT,
+    #endif
+    #endif
+
+    #ifndef MAGNUM_TARGET_GLES
+    /**
+     * RGBA, unsigned int, each component 8bit.
+     * @requires_gl Use @ref Magnum::ColorType "ColorType::UnsignedByte" in
+     *      OpenGL ES instead.
+     */
+    UnsignedInt8888 = GL_UNSIGNED_INT_8_8_8_8,
+
+    /**
+     * ABGR, unsigned int, each component 8bit.
+     * @requires_gl Only RGBA component ordering is available in OpenGL ES, see
+     *      @ref Magnum::ColorType "ColorType::UnsignedInt8888" for more
+     *      information.
+     */
+    UnsignedInt8888Rev = GL_UNSIGNED_INT_8_8_8_8_REV,
+
+    /**
+     * RGBA, unsigned int, each RGB component 10bit, alpha component 2bit.
+     * @requires_gl Only @ref Magnum::ColorType "ColorType::UnsignedInt2101010Rev"
+     *      is available in OpenGL ES.
+     */
+    UnsignedInt1010102 = GL_UNSIGNED_INT_10_10_10_2,
+    #endif
+
+    /**
+     * ABGR, unsigned int, each RGB component 10bit, alpha component 2bit.
+     * @requires_gles30 Can't be used for framebuffer reading in OpenGL ES 2.0.
+     * @requires_gles30 For texture data only, extension
+     *      @es_extension{EXT,texture_type_2_10_10_10_REV}.
+     */
+    #ifndef MAGNUM_TARGET_GLES2
+    UnsignedInt2101010Rev = GL_UNSIGNED_INT_2_10_10_10_REV,
+    #else
+    UnsignedInt2101010Rev = GL_UNSIGNED_INT_2_10_10_10_REV_EXT,
+    #endif
+
+    #ifndef MAGNUM_TARGET_GLES2
+    /**
+     * BGR, unsigned int, red and green 11bit float, blue 10bit float.
+     * @requires_gl30 %Extension @extension{EXT,packed_float}
+     * @requires_gles30 Floating-point types are not available in OpenGL ES
+     *      2.0.
+     */
+    UnsignedInt10F11F11FRev = GL_UNSIGNED_INT_10F_11F_11F_REV,
+
+    /**
+     * BGR, unsigned int, each component 9bit + 5bit exponent.
+     * @requires_gl30 %Extension @extension{EXT,texture_shared_exponent}
+     * @requires_gles30 Only 8bit and 16bit types are available in OpenGL ES
+     *      2.0.
+     */
+    UnsignedInt5999Rev = GL_UNSIGNED_INT_5_9_9_9_REV,
+    #endif
+
+    /**
+     * Unsigned int, depth component 24bit, stencil index 8bit.
+     * @requires_gl30 %Extension @extension{ARB,framebuffer_object}
+     * @requires_gles30 For texture data only, extension @es_extension{OES,packed_depth_stencil}.
+     */
+    #ifndef MAGNUM_TARGET_GLES2
+    UnsignedInt248 = GL_UNSIGNED_INT_24_8,
+    #else
+    UnsignedInt248 = GL_UNSIGNED_INT_24_8_OES,
+    #endif
+
+    #ifndef MAGNUM_TARGET_GLES2
+    /**
+     * Float + unsigned int, depth component 32bit float, 24bit gap, stencil
+     * index 8bit.
+     * @requires_gl30 %Extension @extension{ARB,depth_buffer_float}
+     * @requires_gles30 For texture data only, only @ref Magnum::ColorType "ColorType::UnsignedInt248"
+     *      is available in OpenGL ES 2.0.
+     */
+    Float32UnsignedInt248Rev = GL_FLOAT_32_UNSIGNED_INT_24_8_REV
+    #endif
+};
+
+/** @debugoperator{ColorFormat} */
+Debug MAGNUM_EXPORT operator<<(Debug debug, ColorFormat value);
+
+/** @debugoperator{ColorFormat} */
+Debug MAGNUM_EXPORT operator<<(Debug debug, ColorType value);
+
+}
+
+#endif

src/Context.cpp

@@ -250,6 +250,7 @@ const std::vector<Extension>& Extension::extensions(Version version) {
         _extension(GL,EXT,texture_storage),
         _extension(GL,EXT,map_buffer_range),
         _extension(GL,NV,draw_buffers),
+        _extension(GL,NV,fbo_color_attachments),
         _extension(GL,NV,read_buffer),
         _extension(GL,NV,read_depth),
         _extension(GL,NV,read_depth_stencil),

src/Context.h

@@ -321,8 +321,9 @@ class MAGNUM_EXPORT Context {
          * @endcode
          *
          * If no version from the list is supported, returns lowest available
-         * OpenGL version (@ref Version::GL210 for desktop OpenGL, @ref Version::GLES200
-         * for OpenGL ES).
+         * OpenGL version (@ref Version::GL210 for desktop OpenGL,
+         * @ref Version::GLES200 for OpenGL ES).
+         * @see @ref isExtensionSupported(Version)
          */
         Version supportedVersion(std::initializer_list<Version> versions) const;
 
@@ -346,6 +347,25 @@ class MAGNUM_EXPORT Context {
             return isVersionSupported(T::coreVersion()) || (isVersionSupported(T::requiredVersion()) && extensionStatus[T::Index]);
         }
 
+        /**
+         * @brief Whether given extension is supported in given version
+         *
+         * Similar to @ref isExtensionSupported(), but checks also that the
+         * minimal required version of the extension is larger or equal to
+         * @p version. Useful mainly in shader compilation when the decisions
+         * depend on selected GLSL version, for example:
+         * @code
+         * const Version version = Context::current()->supportedVersion({Version::GL320, Version::GL300, Version::GL210});
+         * if(Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>(version)) {
+         *     // Called only if ARB_explicit_attrib_location is supported
+         *     // *and* version is higher than GL 3.1
+         * }
+         * @endcode
+         */
+        template<class T> bool isExtensionSupported(Version version) const {
+            return T::coreVersion() <= version || (T::requiredVersion() <= version && extensionStatus[T::Index]);
+        }
+
         /**
          * @brief Whether given extension is supported
          *

src/CubeMapTexture.h

@@ -54,7 +54,7 @@ See Texture documentation for introduction.
 Common usage is to fully configure all texture parameters and then set the
 data from e.g. set of Image objects:
 @code
-Image2D positiveX({256, 256}, ImageFormat::RGBA, ImageType::UnsignedByte, dataPositiveX);
+Image2D positiveX({256, 256}, ColorFormat::RGBA, ColorType::UnsignedByte, dataPositiveX);
 // ...
 
 CubeMapTexture texture;

src/CubeMapTextureArray.h

@@ -48,7 +48,7 @@ calling setStorage() or by passing properly sized empty Image to setImage().
 Example: array with 16 layers of cube map faces, each face consisting of six
 64x64 images:
 @code
-Image3D dummy({64, 64, 16*6}, ImageFormat::RGBA, ImageType::UnsignedByte, nullptr);
+Image3D dummy({64, 64, 16*6}, ColorFormat::RGBA, ColorType::UnsignedByte, nullptr);
 
 CubeMapTextureArray texture;
 texture.setMagnificationFilter(Sampler::Filter::Linear)
@@ -57,7 +57,7 @@ texture.setMagnificationFilter(Sampler::Filter::Linear)
 
 for(std::size_t i = 0; i != 16; ++i) {
     void* dataPositiveX = ...;
-    Image2D imagePositiveX({64, 64}, ImageFormat::RGBA, ImageType::UnsignedByte, imagePositiveX);
+    Image2D imagePositiveX({64, 64}, ColorFormat::RGBA, ColorType::UnsignedByte, imagePositiveX);
     // ...
     texture.setSubImage(i, CubeMapTextureArray::Coordinate::PositiveX, 0, {}, imagePositiveX);
     texture.setSubImage(i, CubeMapTextureArray::Coordinate::NegativeX, 0, {}, imageNegativeX);

src/DebugTools/ForceRenderer.h

@@ -40,7 +40,7 @@ namespace Magnum { namespace DebugTools {
 /**
 @brief Force renderer options
 
-See ForceRenderer documentation for more information.
+See @ref ForceRenderer documentation for more information.
 */
 class ForceRendererOptions {
     public:
@@ -99,7 +99,7 @@ Vector3 force;
 new DebugTools::ForceRenderer2D(object, {0.3f, 1.5f, -0.7f}, &force, "my", debugDrawables);
 @endcode
 
-@see ForceRenderer2D, ForceRenderer3D
+@see @ref ForceRenderer2D, @ref ForceRenderer3D, @ref ForceRendererOptions
 */
 template<UnsignedInt dimensions> class MAGNUM_DEBUGTOOLS_EXPORT ForceRenderer: public SceneGraph::Drawable<dimensions, Float> {
     public:

src/DebugTools/ObjectRenderer.h

@@ -39,7 +39,7 @@ namespace Magnum { namespace DebugTools {
 /**
 @brief Object renderer options
 
-See ObjectRenderer documentation for more information.
+See @ref ObjectRenderer documentation for more information.
 */
 class ObjectRendererOptions {
     public:
@@ -81,7 +81,7 @@ Object3D* object;
 new DebugTools::ObjectRenderer2D(object, "my", debugDrawables);
 @endcode
 
-@see ObjectRenderer2D, ObjectRenderer3D
+@see @ref ObjectRenderer2D, @ref ObjectRenderer3D, @ref ObjectRendererOptions
 */
 template<UnsignedInt dimensions> class MAGNUM_DEBUGTOOLS_EXPORT ObjectRenderer: public SceneGraph::Drawable<dimensions, Float> {
     public:

src/DebugTools/ShapeRenderer.cpp

@@ -56,6 +56,7 @@ template<> void createDebugMesh(ShapeRenderer<2>& renderer, const Shapes::Implem
             renderer.renderers.push_back(new Implementation::PointRenderer<2>(shape));
             break;
         case Shapes::AbstractShape2D::Type::Sphere:
+        case Shapes::AbstractShape2D::Type::InvertedSphere: /* Isn't publicly subclassed, but shouldn't matter */
             renderer.renderers.push_back(new Implementation::SphereRenderer<2>(shape));
             break;
         case Shapes::AbstractShape2D::Type::Capsule:
@@ -90,6 +91,7 @@ template<> void createDebugMesh(ShapeRenderer<3>& renderer, const Shapes::Implem
             renderer.renderers.push_back(new Implementation::PointRenderer<3>(shape));
             break;
         case Shapes::AbstractShape3D::Type::Sphere:
+        case Shapes::AbstractShape3D::Type::InvertedSphere: /* Isn't publicly subclassed, but shouldn't matter */
             renderer.renderers.push_back(new Implementation::SphereRenderer<3>(shape));
             break;
         case Shapes::AbstractShape3D::Type::Capsule:

src/DebugTools/ShapeRenderer.h

@@ -49,7 +49,7 @@ namespace Implementation {
 /**
 @brief Shape renderer options
 
-See ShapeRenderer documentation for more information.
+See @ref ShapeRenderer documentation for more information.
 */
 class ShapeRendererOptions {
     public:
@@ -133,7 +133,9 @@ Shapes::AbstractShape2D* shape;
 new DebugTools::ShapeRenderer2D(shape, "red", debugDrawables);
 @endcode
 
-@see ShapeRenderer2D, ShapeRenderer3D
+@see @ref ShapeRenderer2D, @ref ShapeRenderer3D, @ref ShapeRendererOptions
+
+@todo Different drawing style for inverted shapes? (marking the "inside" somehow)
 */
 template<UnsignedInt dimensions> class MAGNUM_DEBUGTOOLS_EXPORT ShapeRenderer: public SceneGraph::Drawable<dimensions, Float> {
     friend void Implementation::createDebugMesh<>(ShapeRenderer<dimensions>&, const Shapes::Implementation::AbstractShape<dimensions>&);

src/DefaultFramebuffer.h

@@ -323,8 +323,9 @@ class MAGNUM_EXPORT DefaultFramebuffer: public AbstractFramebuffer {
          * If @extension{EXT,direct_state_access} is not available and the
          * framebuffer is not currently bound, it is bound before the
          * operation.
-         * @see mapForRead(), @fn_gl{BindFramebuffer}, @fn_gl{DrawBuffers} or
-         *      @fn_gl_extension{FramebufferDrawBuffers,EXT,direct_state_access}
+         * @see @ref maxDrawBuffers(), @ref maxDualSourceDrawBuffers(),
+         *      @ref mapForRead(), @fn_gl{BindFramebuffer}, @fn_gl{DrawBuffers}
+         *      or @fn_gl_extension{FramebufferDrawBuffers,EXT,direct_state_access}
          * @requires_gles30 Draw attachments for default framebuffer are
          *      available only in OpenGL ES 3.0.
          */

src/Extensions.h

@@ -99,7 +99,7 @@ namespace GL {
         _extension(GL,ARB,texture_query_lod,            GL210, GL400) // #73
         _extension(GL,ARB,texture_compression_bptc,     GL310, GL420) // #77
         _extension(GL,ARB,blend_func_extended,          GL210, GL330) // #78
-        _extension(GL,ARB,explicit_attrib_location,     GL210, GL330) // #79
+        _extension(GL,ARB,explicit_attrib_location, /*!*/ GL310, GL330) // #79
         _extension(GL,ARB,occlusion_query2,             GL210, GL330) // #80
         _extension(GL,ARB,sampler_objects,              GL210, GL330) // #81
         _extension(GL,ARB,shader_bit_encoding,    /*?*/ GL210, GL330) // #82
@@ -123,7 +123,7 @@ namespace GL {
         _extension(GL,ARB,viewport_array,               GL210, GL410) // #100
         _extension(GL,ARB,robustness,                   GL210,  None) // #105
         _extension(GL,ARB,base_instance,                GL210, GL420) // #107
-        _extension(GL,ARB,shading_language_420pack,     GL300, GL420) // #108
+        _extension(GL,ARB,shading_language_420pack, /*!*/ GL310, GL420) // #108
         _extension(GL,ARB,transform_feedback_instanced, GL210, GL420) // #109
         _extension(GL,ARB,compressed_texture_pixel_storage, GL210, GL420) // #110
         _extension(GL,ARB,conservative_depth,           GL300, GL420) // #111
@@ -140,7 +140,7 @@ namespace GL {
         _extension(GL,ARB,texture_view,                 GL210, GL430) // #124
         _extension(GL,ARB,vertex_attrib_binding,        GL210, GL430) // #125
         _extension(GL,ARB,ES3_compatibility,            GL330, GL430) // #127
-        _extension(GL,ARB,explicit_uniform_location,    GL210, GL430) // #128
+        _extension(GL,ARB,explicit_uniform_location, /*!*/ GL310, GL430) // #128
         _extension(GL,ARB,fragment_layer_viewport,      GL300, GL430) // #129
         _extension(GL,ARB,framebuffer_no_attachments,   GL210, GL430) // #130
         _extension(GL,ARB,internalformat_query2,        GL210, GL430) // #131
@@ -228,6 +228,7 @@ namespace GL {
         _extension(GL,KHR,debug,                    GLES200,    None) // #118
     } namespace NV {
         _extension(GL,NV,draw_buffers,              GLES200, GLES300) // #91
+        _extension(GL,NV,fbo_color_attachments,     GLES200, GLES300) // #92
         _extension(GL,NV,read_buffer,               GLES200, GLES300) // #93
         _extension(GL,NV,read_buffer_front,         GLES200,    None) // #93
         _extension(GL,NV,read_depth,                GLES200, GLES300) // #94
@@ -262,6 +263,20 @@ namespace GL {
 #undef _extension
 #endif
 
+/*
+    Notes (marked with ! above)
+
+    ARB_explicit_attrib_location, ARB_explicit_uniform_location don't work
+    with GLSL 1.20 (compiler error related to layout qualifier on Mesa) or 1.30
+    (compiler error related to layout qualifier on NVidia), bumping minimal
+    required version to GL 3.1 even if both have *2.1* as minimal.
+
+    ARB_shading_language_420pack (particularly sampler bindings) doesn't work
+    with GLSL 1.30 (compiler error related to layout qualifier, similar to the
+    above), bumping minimal required version to GL 3.1 even if it has *3.0* as
+    minimal.
+*/
+
 }
 
 }

src/Framebuffer.cpp

@@ -52,6 +52,25 @@ const Framebuffer::BufferAttachment Framebuffer::BufferAttachment::DepthStencil
 const Framebuffer::InvalidationAttachment Framebuffer::InvalidationAttachment::Depth = Framebuffer::InvalidationAttachment(GL_DEPTH_ATTACHMENT);
 const Framebuffer::InvalidationAttachment Framebuffer::InvalidationAttachment::Stencil = Framebuffer::InvalidationAttachment(GL_STENCIL_ATTACHMENT);
 
+Int Framebuffer::maxColorAttachments() {
+    #ifdef MAGNUM_TARGET_GLES2
+    if(!Context::current()->isExtensionSupported<Extensions::GL::NV::fbo_color_attachments>())
+        return 0;
+    #endif
+
+    GLint& value = Context::current()->state().framebuffer->maxColorAttachments;
+
+    if(value == 0) {
+        #ifndef MAGNUM_TARGET_GLES2
+        glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS, &value);
+        #else
+        glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS_NV, &value);
+        #endif
+    }
+
+    return value;
+}
+
 Framebuffer::Framebuffer(const Rectanglei& viewport) {
     _viewport = viewport;
 

src/Framebuffer.h

@@ -288,6 +288,18 @@ class MAGNUM_EXPORT Framebuffer: public AbstractFramebuffer {
             #endif
         };
 
+        /** @todo `GL_MAX_FRAMEBUFFER_WIDTH` etc. when @extension{ARB,framebuffer_no_attachments} is done */
+
+        /**
+         * @brief Max supported color attachment count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If ES extension @extension{NV,fbo_color_attachments}
+         * is not available, returns `0`.
+         * @see @ref mapForDraw(), @fn_gl{Get} with @def_gl{MAX_COLOR_ATTACHMENTS}
+         */
+        static Int maxColorAttachments();
+
         /**
          * @brief Constructor
          *
@@ -334,7 +346,9 @@ class MAGNUM_EXPORT Framebuffer: public AbstractFramebuffer {
          * If @extension{EXT,direct_state_access} is not available and the
          * framebufferbuffer is not currently bound, it is bound before the
          * operation.
-         * @see mapForRead(), @fn_gl{BindFramebuffer}, @fn_gl{DrawBuffers} or
+         * @see @ref maxDrawBuffers(), @ref maxDualSourceDrawBuffers(),
+         *      @ref maxColorAttachments(), @ref mapForRead(),
+         *      @fn_gl{BindFramebuffer}, @fn_gl{DrawBuffers} or
          *      @fn_gl_extension{FramebufferDrawBuffers,EXT,direct_state_access}
          * @requires_gles30 %Extension @es_extension2{NV,draw_buffers,GL_NV_draw_buffers}
          */
@@ -351,7 +365,8 @@ class MAGNUM_EXPORT Framebuffer: public AbstractFramebuffer {
          * If @extension{EXT,direct_state_access} is not available and the
          * framebufferbuffer is not currently bound, it is bound before the
          * operation.
-         * @see mapForRead(), @fn_gl{BindFramebuffer}, @fn_gl{DrawBuffer} or
+         * @see @ref maxColorAttachments(), @ref mapForRead(),
+         *      @fn_gl{BindFramebuffer}, @fn_gl{DrawBuffer} or
          *      @fn_gl_extension{FramebufferDrawBuffer,EXT,direct_state_access},
          *      @fn_gl{DrawBuffers} in OpenGL ES 3.0
          * @requires_gles30 %Extension @es_extension2{NV,draw_buffers,GL_NV_draw_buffers}

src/Image.cpp

@@ -26,7 +26,7 @@
 
 namespace Magnum {
 
-template<UnsignedInt dimensions> void Image<dimensions>::setData(ImageFormat format, ImageType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, void* data) {
+template<UnsignedInt dimensions> void Image<dimensions>::setData(ColorFormat format, ColorType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, void* data) {
     delete[] _data;
     _format = format;
     _type = type;

src/Image.h

@@ -53,7 +53,7 @@ template<UnsignedInt dimensions> class Image: public AbstractImage {
          * Note that the image data are not copied on construction, but they
          * are deleted on class destruction.
          */
-        explicit Image(ImageFormat format, ImageType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, void* data): AbstractImage(format, type), _size(size), _data(reinterpret_cast<unsigned char*>(data)) {}
+        explicit Image(ColorFormat format, ColorType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, void* data): AbstractImage(format, type), _size(size), _data(reinterpret_cast<unsigned char*>(data)) {}
 
         /**
          * @brief Constructor
@@ -63,7 +63,7 @@ template<UnsignedInt dimensions> class Image: public AbstractImage {
          * Dimensions and data pointer are set to zero, call setData() to fill
          * the image with data.
          */
-        explicit Image(ImageFormat format, ImageType type): AbstractImage(format, type), _data(nullptr) {}
+        explicit Image(ColorFormat format, ColorType type): AbstractImage(format, type), _data(nullptr) {}
 
         /** @brief Copying is not allowed */
         Image(const Image<dimensions>&& other) = delete;
@@ -104,7 +104,7 @@ template<UnsignedInt dimensions> class Image: public AbstractImage {
          * Deletes previous data and replaces them with new. Note that the
          * data are not copied, but they are deleted on destruction.
          */
-        void setData(ImageFormat format, ImageType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, void* data);
+        void setData(ColorFormat format, ColorType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, void* data);
 
     private:
         Math::Vector<Dimensions, Int> _size;

src/ImageFormat.h

@@ -25,456 +25,25 @@
 */
 
 /** @file
- * @brief Enum Magnum::ImageFormat, Magnum::ImageType
+ * @brief Enum @ref Magnum::ImageFormat, @ref Magnum::ImageType
+ * @deprecated Use @ref ColorFormat.h instead.
  */
 
-#include "Magnum.h"
-#include "OpenGL.h"
-#include "magnumVisibility.h"
+#include "ColorFormat.h"
 
 namespace Magnum {
 
 /**
-@brief Format of image data
-
-Note that some formats can be used only for framebuffer reading (using
-AbstractFramebuffer::read()) and some only for texture data (using Texture::setImage()
-and others).
-@see Image, ImageReference, BufferImage, Trade::ImageData
+@copybrief ColorFormat
+@deprecated Use @ref ColorFormat instead.
 */
-enum class ImageFormat: GLenum {
-    /**
-     * Floating-point red channel.
-     * @requires_gles30 For texture data only, extension @es_extension{EXT,texture_rg}.
-     * @requires_es_extension For framebuffer reading, extension @es_extension{EXT,texture_rg}.
-     */
-    #ifndef MAGNUM_TARGET_GLES2
-    Red = GL_RED,
-    #else
-    Red = GL_RED_EXT,
-    #endif
-
-    #ifndef MAGNUM_TARGET_GLES
-    /**
-     * Floating-point green channel.
-     * @requires_gl Only @ref Magnum::ImageFormat "ImageFormat::Red" is
-     *      available in OpenGL ES.
-     */
-    Green = GL_GREEN,
-
-    /**
-     * Floating-point blue channel.
-     * @requires_gl Only @ref Magnum::ImageFormat "ImageFormat::Red" is
-     *      available in OpenGL ES.
-     */
-    Blue = GL_BLUE,
-    #endif
-
-    #if defined(MAGNUM_TARGET_GLES2) || defined(DOXYGEN_GENERATING_OUTPUT)
-    /**
-     * Floating-point luminance channel. The value is used for all RGB
-     * channels.
-     * @deprecated Included for compatibility reasons only, use
-     *      @ref Magnum::ImageFormat "ImageFormat::Red" instead.
-     * @requires_gles20 Not available in ES 3.0 or desktop OpenGL. Use
-     *      @ref Magnum::ImageFormat "ImageFormat::Red" instead.
-     */
-    Luminance = GL_LUMINANCE,
-    #endif
-
-    /**
-     * Floating-point red and green channel.
-     * @requires_gl30 %Extension @extension{ARB,texture_rg} and @extension{EXT,texture_integer}
-     * @requires_gles30 For texture data only, extension @es_extension{EXT,texture_rg}.
-     * @requires_es_extension For framebuffer reading, extension @es_extension{EXT,texture_rg}.
-     */
-    #ifndef MAGNUM_TARGET_GLES2
-    RG = GL_RG,
-    #else
-    RG = GL_RG_EXT,
-    #endif
-
-    #if defined(MAGNUM_TARGET_GLES2) || defined(DOXYGEN_GENERATING_OUTPUT)
-    /**
-     * Floating-point luminance and alpha channel. First value is used for all
-     * RGB channels, second value is used for alpha channel.
-     * @deprecated Included for compatibility reasons only, use
-     *      @ref Magnum::ImageFormat "ImageFormat::RG" instead.
-     * @requires_gles20 Not available in ES 3.0 or desktop OpenGL. Use
-     *      @ref Magnum::ImageFormat "ImageFormat::RG" instead.
-     */
-    LuminanceAlpha = GL_LUMINANCE_ALPHA,
-    #endif
-
-    /**
-     * Floating-point RGB.
-     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
-     */
-    RGB = GL_RGB,
-
-    /** Floating-point RGBA. */
-    RGBA = GL_RGBA,
-
-    #ifndef MAGNUM_TARGET_GLES
-    /**
-     * Floating-point BGR.
-     * @requires_gl Only RGB component ordering is available in OpenGL ES.
-     */
-    BGR = GL_BGR,
-    #endif
-
-    #ifndef MAGNUM_TARGET_GLES3
-    /**
-     * Floating-point BGRA.
-     * @requires_es_extension %Extension @es_extension{EXT,read_format_bgra}
-     *      for framebuffer reading, extension @es_extension{APPLE,texture_format_BGRA8888}
-     *      or @es_extension{EXT,texture_format_BGRA8888} for texture data.
-     */
-    #ifndef MAGNUM_TARGET_GLES
-    BGRA = GL_BGRA,
-    #else
-    BGRA = GL_BGRA_EXT,
-    #endif
-    #endif
-
-    #ifndef MAGNUM_TARGET_GLES2
-    /**
-     * Integer red channel.
-     * @requires_gl30 %Extension @extension{EXT,texture_integer}
-     * @requires_gles30 Only floating-point image data are available in OpenGL
-     *      ES 2.0.
-     */
-    RedInteger = GL_RED_INTEGER,
-
-    #ifndef MAGNUM_TARGET_GLES
-    /**
-     * Integer green channel.
-     * @requires_gl30 %Extension @extension{EXT,texture_integer}
-     * @requires_gl Only @ref Magnum::ImageFormat "ImageFormat::RedInteger"
-     *      is available in OpenGL ES 3.0, only floating-point image data are
-     *      available in OpenGL ES 2.0.
-     */
-    GreenInteger = GL_GREEN_INTEGER,
-
-    /**
-     * Integer blue channel.
-     * @requires_gl30 %Extension @extension{EXT,texture_integer}
-     * @requires_gl Only @ref Magnum::ImageFormat "ImageFormat::RedInteger" is
-     *      available in OpenGL ES 3.0, only floating-point image data are
-     *      available in OpenGL ES 2.0.
-     */
-    BlueInteger = GL_BLUE_INTEGER,
-    #endif
-
-    /**
-     * Integer red and green channel.
-     * @requires_gl30 %Extension @extension{ARB,texture_rg} and @extension{EXT,texture_integer}
-     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
-     * @requires_gles30 For texture data only, only floating-point image data
-     *      are available in OpenGL ES 2.0.
-     */
-    RGInteger = GL_RG_INTEGER,
-
-    /**
-     * Integer RGB.
-     * @requires_gl30 %Extension @extension{EXT,texture_integer}
-     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
-     * @requires_gles30 For texture data only, only floating-point image data
-     *      are available in OpenGL ES 2.0.
-     */
-    RGBInteger = GL_RGB_INTEGER,
-
-    /**
-     * Integer RGBA.
-     * @requires_gl30 %Extension @extension{EXT,texture_integer}
-     * @requires_gles30 Only floating-point image data are available in OpenGL
-     *      ES 2.0.
-     */
-    RGBAInteger = GL_RGBA_INTEGER,
-
-    #ifndef MAGNUM_TARGET_GLES
-    /**
-     * Integer BGR.
-     * @requires_gl30 %Extension @extension{EXT,texture_integer}
-     * @requires_gl Only @ref Magnum::ImageFormat "ImageFormat::RGBInteger" is
-     *      available in OpenGL ES 3.0, only floating-point image data are
-     *      available in OpenGL ES 2.0.
-     */
-    BGRInteger = GL_BGR_INTEGER,
-
-    /**
-     * Integer BGRA.
-     * @requires_gl30 %Extension @extension{EXT,texture_integer}
-     * @requires_gl Only @ref Magnum::ImageFormat "ImageFormat::RGBAInteger" is
-     *      available in OpenGL ES 3.0, only floating-point image data are
-     *      available in OpenGL ES 2.0.
-     */
-    BGRAInteger = GL_BGRA_INTEGER,
-    #endif
-    #endif
-
-    /**
-     * Depth component.
-     * @requires_gles30 For texture data only, extension @es_extension{ANGLE,depth_texture}.
-     * @requires_es_extension For framebuffer reading only, extension
-     *      @es_extension2{NV,read_depth,GL_NV_read_depth_stencil}.
-     */
-    DepthComponent = GL_DEPTH_COMPONENT,
-
-    #ifndef MAGNUM_TARGET_GLES3
-    /**
-     * Stencil index.
-     * @requires_gl44 %Extension @extension{ARB,texture_stencil8} for texture
-     *      data, otherwise for framebuffer reading only.
-     * @requires_es_extension %Extension @es_extension2{NV,read_stencil,GL_NV_read_depth_stencil},
-     *      for framebuffer reading only.
-     * @todo Where to get GL_STENCIL_INDEX in ES?
-     */
-    #ifndef MAGNUM_TARGET_GLES
-    StencilIndex = GL_STENCIL_INDEX,
-    #else
-    StencilIndex = 0x1901,
-    #endif
-    #endif
-
-    /**
-     * Depth and stencil.
-     * @requires_gl30 %Extension @extension{ARB,framebuffer_object}
-     * @requires_gles30 For texture data only, extension @es_extension{OES,packed_depth_stencil}.
-     * @requires_es_extension For framebuffer reading only, extension
-     *      @es_extension2{NV,read_depth_stencil,GL_NV_read_depth_stencil}.
-     */
-    #ifndef MAGNUM_TARGET_GLES2
-    DepthStencil = GL_DEPTH_STENCIL
-    #else
-    DepthStencil = GL_DEPTH_STENCIL_OES
-    #endif
-};
+typedef ColorFormat ImageFormat;
 
 /**
-@brief Type of image data
-
-Note that some formats can be used only for framebuffer reading (using
-AbstractFramebuffer::read()) and some only for texture data (using Texture::setImage()
-and others).
-@see Image, ImageReference, BufferImage, Trade::ImageData
- */
-enum class ImageType: GLenum {
-    /** Each component unsigned byte. */
-    UnsignedByte = GL_UNSIGNED_BYTE,
-
-    #ifndef MAGNUM_TARGET_GLES2
-    /**
-     * Each component signed byte.
-     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
-     * @requires_gles30 For texture data only, only @ref Magnum::ImageType "ImageType::UnsignedByte"
-     *      is available in OpenGL ES 2.0.
-     */
-    Byte = GL_BYTE,
-    #endif
-
-    /**
-     * Each component unsigned short.
-     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
-     * @requires_gles30 For texture data only, extension @es_extension{OES,depth_texture}
-     *      or @es_extension{ANGLE,depth_texture}.
-     */
-    UnsignedShort = GL_UNSIGNED_SHORT,
-
-    #ifndef MAGNUM_TARGET_GLES2
-    /**
-     * Each component signed short.
-     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
-     * @requires_gles30 For texture data only, only @ref Magnum::ImageType "ImageType::UnsignedShort"
-     *      is available in OpenGL ES 2.0.
-     */
-    Short = GL_SHORT,
-    #endif
-
-    /**
-     * Each component unsigned int.
-     * @requires_gles30 Can't be used for framebuffer reading in OpenGL ES 2.0.
-     * @requires_gles30 For texture data only, extension @es_extension{OES,depth_texture}
-     *      or @es_extension{ANGLE,depth_texture}.
-     */
-    UnsignedInt = GL_UNSIGNED_INT,
-
-    #ifndef MAGNUM_TARGET_GLES2
-    /**
-     * Each component signed int.
-     * @requires_gles30 Only @ref Magnum::ImageType "ImageType::UnsignedInt"
-     *      is available in OpenGL ES 2.0.
-     */
-    Int = GL_INT,
-    #endif
-
-    /**
-     * Each component half float.
-     * @requires_gl30 %Extension @extension{NV,half_float} / @extension{ARB,half_float_pixel}
-     * @requires_gles30 For texture data only, extension
-     *      @es_extension2{OES,texture_half_float,OES_texture_float}.
-     */
-    #ifndef MAGNUM_TARGET_GLES2
-    HalfFloat = GL_HALF_FLOAT,
-    #else
-    HalfFloat = GL_HALF_FLOAT_OES,
-    #endif
-
-    /**
-     * Each component float.
-     * @requires_gles30 For texture data only, extension @es_extension{OES,texture_float}.
-     */
-    Float = GL_FLOAT,
-
-    #ifndef MAGNUM_TARGET_GLES
-    /**
-     * RGB, unsigned byte, red and green component 3bit, blue component 2bit.
-     * @requires_gl Packed 12bit types are not available in OpenGL ES.
-     */
-    UnsignedByte332 = GL_UNSIGNED_BYTE_3_3_2,
-
-    /**
-     * BGR, unsigned byte, red and green component 3bit, blue component 2bit.
-     * @requires_gl Packed 12bit types are not available in OpenGL ES.
-     */
-    UnsignedByte233Rev = GL_UNSIGNED_BYTE_2_3_3_REV,
-    #endif
-
-    /**
-     * RGB, unsigned byte, red and blue component 5bit, green 6bit.
-     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
-     */
-    UnsignedShort565 = GL_UNSIGNED_SHORT_5_6_5,
-
-    #ifndef MAGNUM_TARGET_GLES
-    /**
-     * BGR, unsigned short, red and blue 5bit, green 6bit.
-     * @requires_gl Only @ref Magnum::ImageType "ImageType::RGB565" is
-     *      available in OpenGL ES.
-     */
-    UnsignedShort565Rev = GL_UNSIGNED_SHORT_5_6_5_REV,
-    #endif
-
-    /**
-     * RGBA, unsigned short, each component 4bit.
-     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
-     */
-    UnsignedShort4444 = GL_UNSIGNED_SHORT_4_4_4_4,
-
-    #ifndef MAGNUM_TARGET_GLES3
-    /**
-     * ABGR, unsigned short, each component 4bit.
-     * @requires_es_extension For framebuffer reading only, extension
-     *      @es_extension{EXT,read_format_bgra}.
-     */
-    #ifndef MAGNUM_TARGET_GLES
-    UnsignedShort4444Rev = GL_UNSIGNED_SHORT_4_4_4_4_REV,
-    #else
-    UnsignedShort4444Rev = GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT,
-    #endif
-    #endif
-
-    /**
-     * RGBA, unsigned short, each RGB component 5bit, alpha component 1bit.
-     * @requires_gl Can't be used for framebuffer reading in OpenGL ES.
-     */
-    UnsignedShort5551 = GL_UNSIGNED_SHORT_5_5_5_1,
-
-    #ifndef MAGNUM_TARGET_GLES3
-    /**
-     * ABGR, unsigned short, each RGB component 5bit, alpha component 1bit.
-     * @requires_es_extension For framebuffer reading only, extension
-     *      @es_extension{EXT,read_format_bgra}.
-     */
-    #ifndef MAGNUM_TARGET_GLES
-    UnsignedShort1555Rev = GL_UNSIGNED_SHORT_1_5_5_5_REV,
-    #else
-    UnsignedShort1555Rev = GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT,
-    #endif
-    #endif
-
-    #ifndef MAGNUM_TARGET_GLES
-    /**
-     * RGBA, unsigned int, each component 8bit.
-     * @requires_gl Use @ref Magnum::ImageType "ImageType::UnsignedByte" in
-     *      OpenGL ES instead.
-     */
-    UnsignedInt8888 = GL_UNSIGNED_INT_8_8_8_8,
-
-    /**
-     * ABGR, unsigned int, each component 8bit.
-     * @requires_gl Only RGBA component ordering is available in OpenGL ES, see
-     *      @ref Magnum::ImageType "ImageType::UnsignedInt8888" for more
-     *      information.
-     */
-    UnsignedInt8888Rev = GL_UNSIGNED_INT_8_8_8_8_REV,
-
-    /**
-     * RGBA, unsigned int, each RGB component 10bit, alpha component 2bit.
-     * @requires_gl Only @ref Magnum::ImageType "ImageType::UnsignedInt2101010Rev"
-     *      is available in OpenGL ES.
-     */
-    UnsignedInt1010102 = GL_UNSIGNED_INT_10_10_10_2,
-    #endif
-
-    /**
-     * ABGR, unsigned int, each RGB component 10bit, alpha component 2bit.
-     * @requires_gles30 Can't be used for framebuffer reading in OpenGL ES 2.0.
-     * @requires_gles30 For texture data only, extension
-     *      @es_extension{EXT,texture_type_2_10_10_10_REV}.
-     */
-    #ifndef MAGNUM_TARGET_GLES2
-    UnsignedInt2101010Rev = GL_UNSIGNED_INT_2_10_10_10_REV,
-    #else
-    UnsignedInt2101010Rev = GL_UNSIGNED_INT_2_10_10_10_REV_EXT,
-    #endif
-
-    #ifndef MAGNUM_TARGET_GLES2
-    /**
-     * BGR, unsigned int, red and green 11bit float, blue 10bit float.
-     * @requires_gl30 %Extension @extension{EXT,packed_float}
-     * @requires_gles30 Floating-point types are not available in OpenGL ES
-     *      2.0.
-     */
-    UnsignedInt10F11F11FRev = GL_UNSIGNED_INT_10F_11F_11F_REV,
-
-    /**
-     * BGR, unsigned int, each component 9bit + 5bit exponent.
-     * @requires_gl30 %Extension @extension{EXT,texture_shared_exponent}
-     * @requires_gles30 Only 8bit and 16bit types are available in OpenGL ES
-     *      2.0.
-     */
-    UnsignedInt5999Rev = GL_UNSIGNED_INT_5_9_9_9_REV,
-    #endif
-
-    /**
-     * Unsigned int, depth component 24bit, stencil index 8bit.
-     * @requires_gl30 %Extension @extension{ARB,framebuffer_object}
-     * @requires_gles30 For texture data only, extension @es_extension{OES,packed_depth_stencil}.
-     */
-    #ifndef MAGNUM_TARGET_GLES2
-    UnsignedInt248 = GL_UNSIGNED_INT_24_8,
-    #else
-    UnsignedInt248 = GL_UNSIGNED_INT_24_8_OES,
-    #endif
-
-    #ifndef MAGNUM_TARGET_GLES2
-    /**
-     * Float + unsigned int, depth component 32bit float, 24bit gap, stencil
-     * index 8bit.
-     * @requires_gl30 %Extension @extension{ARB,depth_buffer_float}
-     * @requires_gles30 For texture data only, only @ref Magnum::ImageType "ImageType::UnsignedInt248"
-     *      is available in OpenGL ES 2.0.
-     */
-    Float32UnsignedInt248Rev = GL_FLOAT_32_UNSIGNED_INT_24_8_REV
-    #endif
-};
-
-/** @debugoperator{ImageFormat} */
-Debug MAGNUM_EXPORT operator<<(Debug debug, ImageFormat value);
-
-/** @debugoperator{ImageFormat} */
-Debug MAGNUM_EXPORT operator<<(Debug debug, ImageType value);
+@copybrief ColorType
+@deprecated Use @ref ColorType instead.
+*/
+typedef ColorType ImageType;
 
 }
 

src/ImageReference.h

@@ -63,7 +63,7 @@ template<UnsignedInt dimensions> class ImageReference: public AbstractImage {
          * Note that the image data are not copied on construction, but they
          * are deleted on class destruction.
          */
-        constexpr explicit ImageReference(ImageFormat format, ImageType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, void* data): AbstractImage(format, type), _size(size), _data(reinterpret_cast<unsigned char*>(data)) {}
+        constexpr explicit ImageReference(ColorFormat format, ColorType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, void* data): AbstractImage(format, type), _size(size), _data(reinterpret_cast<unsigned char*>(data)) {}
 
         /**
          * @brief Constructor
@@ -74,7 +74,7 @@ template<UnsignedInt dimensions> class ImageReference: public AbstractImage {
          * Data pointer is set to zero, call setData() to fill the image with
          * data.
          */
-        constexpr explicit ImageReference(ImageFormat format, ImageType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size): AbstractImage(format, type), _size(size), _data(nullptr) {}
+        constexpr explicit ImageReference(ColorFormat format, ColorType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size): AbstractImage(format, type), _size(size), _data(nullptr) {}
 
         /** @brief %Image size */
         constexpr typename DimensionTraits<Dimensions, Int>::VectorType size() const { return _size; }

src/Implementation/BufferState.h

@@ -43,10 +43,29 @@ struct BufferState {
     static std::size_t indexForTarget(Buffer::Target target);
     static const Buffer::Target targetForIndex[TargetCount-1];
 
-    constexpr BufferState(): bindings() {}
+    constexpr BufferState(): bindings()
+        #ifndef MAGNUM_TARGET_GLES2
+        #ifndef MAGNUM_TARGET_GLES
+        , minMapAlignment(0), maxAtomicCounterBindings(0), maxShaderStorageBindings(0), shaderStorageOffsetAlignment(0)
+        #endif
+        , maxUniformBindings(0)
+        #endif
+        {}
 
     /* Currently bound buffer for all targets */
     GLuint bindings[TargetCount];
+
+    /* Limits */
+    #ifndef MAGNUM_TARGET_GLES2
+    GLint
+        #ifndef MAGNUM_TARGET_GLES
+        minMapAlignment,
+        maxAtomicCounterBindings,
+        maxShaderStorageBindings,
+        shaderStorageOffsetAlignment,
+        #endif
+        maxUniformBindings;
+    #endif
 };
 
 }}

src/Implementation/FramebufferState.h

@@ -31,10 +31,19 @@
 namespace Magnum { namespace Implementation {
 
 struct FramebufferState {
-    constexpr FramebufferState(): readBinding(0), drawBinding(0), renderbufferBinding(0) {}
+    constexpr FramebufferState(): readBinding(0), drawBinding(0), renderbufferBinding(0), maxDrawBuffers(0), maxColorAttachments(0), maxRenderbufferSize(0), maxSamples(0)
+        #ifndef MAGNUM_TARGET_GLES
+        , maxDualSourceDrawBuffers(0)
+        #endif
+        {}
 
     GLuint readBinding, drawBinding, renderbufferBinding;
+    GLint maxDrawBuffers, maxColorAttachments, maxRenderbufferSize, maxSamples;
+    #ifndef MAGNUM_TARGET_GLES
+    GLint maxDualSourceDrawBuffers;
+    #endif
     Rectanglei viewport;
+    Vector2i maxViewportSize;
 };
 
 }}

src/Implementation/MeshState.h

@@ -29,9 +29,16 @@
 namespace Magnum { namespace Implementation {
 
 struct MeshState {
-    constexpr MeshState(): currentVAO(0) {}
+    constexpr MeshState(): currentVAO(0)
+        #ifndef MAGNUM_TARGET_GLES2
+        , maxElementsIndices(0), maxElementsVertices(0)
+        #endif
+        {}
 
     GLuint currentVAO;
+    #ifndef MAGNUM_TARGET_GLES2
+    GLint maxElementsIndices, maxElementsVertices;
+    #endif
 };
 
 }}

src/Implementation/ShaderProgramState.h

@@ -29,11 +29,33 @@
 namespace Magnum { namespace Implementation {
 
 struct ShaderProgramState {
-    constexpr ShaderProgramState(): current(0), maxSupportedVertexAttributeCount(0) {}
+    constexpr ShaderProgramState(): current(0), maxVertexAttributes(0)
+        #ifndef MAGNUM_TARGET_GLES
+        , maxAtomicCounterBufferSize(0), maxComputeSharedMemorySize(0), maxComputeWorkGroupInvocations(0), maxImageUnits(0), maxImageSamples(0), maxCombinedShaderOutputResources(0), maxUniformLocations(0), maxShaderStorageBlockSize(0)
+        #endif
+        #ifndef MAGNUM_TARGET_GLES2
+        , minTexelOffset(0), maxTexelOffset(0), maxUniformBlockSize(0)
+        #endif
+        {}
 
     /* Currently used program */
     GLuint current;
-    GLint maxSupportedVertexAttributeCount;
+
+    GLint maxVertexAttributes;
+    #ifndef MAGNUM_TARGET_GLES
+    GLint maxAtomicCounterBufferSize,
+        maxComputeSharedMemorySize,
+        maxComputeWorkGroupInvocations,
+        maxImageUnits,
+        maxImageSamples,
+        maxCombinedShaderOutputResources,
+        maxUniformLocations;
+    GLint64 maxShaderStorageBlockSize;
+    #endif
+
+    #ifndef MAGNUM_TARGET_GLES2
+    GLint minTexelOffset, maxTexelOffset, maxUniformBlockSize;
+    #endif
 };
 
 }}

src/Implementation/ShaderState.h

@@ -0,0 +1,92 @@
+#ifndef Magnum_Implementation_ShaderState_h
+#define Magnum_Implementation_ShaderState_h
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include "OpenGL.h"
+#include "Types.h"
+#include "magnumConfigure.h"
+
+namespace Magnum { namespace Implementation {
+
+struct ShaderState {
+    explicit ShaderState():
+        maxVertexOutputComponents{}, maxFragmentInputComponents{},
+        #ifndef MAGNUM_TARGET_GLES
+        maxTessellationControlInputComponents{}, maxTessellationControlOutputComponents{}, maxTessellationControlTotalOutputComponents{}, maxTessellationEvaluationInputComponents{}, maxTessellationEvaluationOutputComponents{}, maxGeometryInputComponents{}, maxGeometryOutputComponents{}, maxGeometryTotalOutputComponents{}, maxAtomicCounterBuffers{}, maxCombinedAtomicCounterBuffers{}, maxAtomicCounters{}, maxCombinedAtomicCounters{}, maxImageUniforms{}, maxCombinedImageUniforms{}, maxShaderStorageBlocks{}, maxCombinedShaderStorageBlocks{},
+        #endif
+        maxTextureImageUnits{}, maxTextureImageUnitsCombined{},
+        #ifndef MAGNUM_TARGET_GLES2
+        maxUniformBlocks{}, maxCombinedUniformBlocks{},
+        #endif
+        maxUniformComponents{}, maxUniformComponentsCombined{}
+        #ifndef MAGNUM_TARGET_GLES2
+        , maxCombinedUniformComponents{}
+        #endif
+        {}
+
+    enum: std::size_t {
+        #ifndef MAGNUM_TARGET_GLES
+        StageCount = 5
+        #else
+        StageCount = 2
+        #endif
+    };
+
+    GLint maxVertexOutputComponents,
+        maxFragmentInputComponents;
+    #ifndef MAGNUM_TARGET_GLES
+    GLint maxTessellationControlInputComponents,
+        maxTessellationControlOutputComponents,
+        maxTessellationControlTotalOutputComponents,
+        maxTessellationEvaluationInputComponents,
+        maxTessellationEvaluationOutputComponents,
+        maxGeometryInputComponents,
+        maxGeometryOutputComponents,
+        maxGeometryTotalOutputComponents;
+    GLint maxAtomicCounterBuffers[StageCount];
+    GLint maxCombinedAtomicCounterBuffers;
+    GLint maxAtomicCounters[StageCount];
+    GLint maxCombinedAtomicCounters;
+    GLint maxImageUniforms[StageCount];
+    GLint maxCombinedImageUniforms;
+    GLint maxShaderStorageBlocks[StageCount];
+    GLint maxCombinedShaderStorageBlocks;
+    #endif
+    GLint maxTextureImageUnits[StageCount];
+    GLint maxTextureImageUnitsCombined;
+    #ifndef MAGNUM_TARGET_GLES2
+    GLint maxUniformBlocks[StageCount];
+    GLint maxCombinedUniformBlocks;
+    #endif
+    GLint maxUniformComponents[StageCount];
+    GLint maxUniformComponentsCombined;
+    #ifndef MAGNUM_TARGET_GLES2
+    GLint maxCombinedUniformComponents[StageCount];
+    #endif
+};
+
+}}
+
+#endif

src/Implementation/State.cpp

@@ -24,12 +24,13 @@
 
 #include "State.h"
 
-#include "BufferState.h"
-#include "FramebufferState.h"
-#include "MeshState.h"
-#include "RendererState.h"
-#include "ShaderProgramState.h"
-#include "TextureState.h"
+#include "Implementation/BufferState.h"
+#include "Implementation/FramebufferState.h"
+#include "Implementation/MeshState.h"
+#include "Implementation/RendererState.h"
+#include "Implementation/ShaderState.h"
+#include "Implementation/ShaderProgramState.h"
+#include "Implementation/TextureState.h"
 
 namespace Magnum { namespace Implementation {
 
@@ -38,12 +39,14 @@ State::State():
     framebuffer(new FramebufferState),
     mesh(new MeshState),
     renderer(new RendererState),
+    shader(new ShaderState),
     shaderProgram(new ShaderProgramState),
     texture(new TextureState) {}
 
 State::~State() {
     delete texture;
     delete shaderProgram;
+    delete shader;
     delete renderer;
     delete mesh;
     delete framebuffer;

src/Implementation/State.h

@@ -30,6 +30,7 @@ struct BufferState;
 struct FramebufferState;
 struct MeshState;
 struct RendererState;
+struct ShaderState;
 struct ShaderProgramState;
 struct TextureState;
 
@@ -41,6 +42,7 @@ struct State {
     FramebufferState* const framebuffer;
     MeshState* const mesh;
     RendererState* const renderer;
+    ShaderState* const shader;
     ShaderProgramState* const shaderProgram;
     TextureState* const texture;
 };

src/Implementation/TextureState.cpp

@@ -26,7 +26,11 @@
 
 namespace Magnum { namespace Implementation {
 
-TextureState::TextureState(): maxSupportedLayerCount(0), maxSupportedAnisotropy(0.0f), currentLayer(0) {}
+TextureState::TextureState(): maxAnisotropy(0.0f), currentLayer(0)
+    #ifndef MAGNUM_TARGET_GLES
+    , maxColorSamples(0), maxDepthSamples(0), maxIntegerSamples(0)
+    #endif
+    {}
 
 TextureState::~TextureState() = default;
 

src/Implementation/TextureState.h

@@ -34,9 +34,13 @@ struct TextureState {
     explicit TextureState();
     ~TextureState();
 
-    GLint maxSupportedLayerCount;
-    GLfloat maxSupportedAnisotropy;
+    GLfloat maxAnisotropy;
     GLint currentLayer;
+    #ifndef MAGNUM_TARGET_GLES
+    GLint maxColorSamples,
+        maxDepthSamples,
+        maxIntegerSamples;
+    #endif
 
     std::vector<GLuint> bindings;
 };

src/Magnum.h

@@ -350,8 +350,15 @@ typedef BasicColor3<Float> Color3;
 typedef BasicColor4<Float> Color4;
 
 #ifndef CORRADE_GCC45_COMPATIBILITY
+enum class ColorFormat: GLenum;
+enum class ColorType: GLenum;
+/** @todo Remove this when dropping backward compatibility */
+typedef ColorFormat ImageFormat;
+typedef ColorType ColorType;
+
 enum class Version: Int;
 #endif
+
 class Context;
 class CubeMapTexture;
 
@@ -371,11 +378,6 @@ typedef Image<1> Image1D;
 typedef Image<2> Image2D;
 typedef Image<3> Image3D;
 
-#ifndef CORRADE_GCC45_COMPATIBILITY
-enum class ImageFormat: GLenum;
-enum class ImageType: GLenum;
-#endif
-
 template<UnsignedInt> class ImageReference;
 typedef ImageReference<1> ImageReference1D;
 typedef ImageReference<2> ImageReference2D;

src/Mesh.cpp

@@ -48,6 +48,30 @@ Mesh::BindIndexBufferImplementation Mesh::bindIndexBufferImplementation = &Mesh:
 Mesh::BindImplementation Mesh::bindImplementation = &Mesh::bindImplementationDefault;
 Mesh::UnbindImplementation Mesh::unbindImplementation = &Mesh::unbindImplementationDefault;
 
+Int Mesh::maxVertexAttributes() { return AbstractShaderProgram::maxVertexAttributes(); }
+
+#ifndef MAGNUM_TARGET_GLES2
+Int Mesh::maxElementsIndices() {
+    GLint& value = Context::current()->state().mesh->maxElementsIndices;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_ELEMENTS_INDICES, &value);
+
+    return value;
+}
+
+Int Mesh::maxElementsVertices() {
+    GLint& value = Context::current()->state().mesh->maxElementsVertices;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &value);
+
+    return value;
+}
+#endif
+
 std::size_t Mesh::indexSize(IndexType type) {
     switch(type) {
         case IndexType::UnsignedByte: return 1;

src/Mesh.h

@@ -215,7 +215,9 @@ If @extension{APPLE,vertex_array_object}, OpenGL ES 3.0 or
 @es_extension{OES,vertex_array_object} on OpenGL ES 2.0 is supported, VAOs are
 used instead of binding the buffers and specifying vertex attribute pointers
 in each draw() call. The engine tracks currently bound VAO to avoid
-unnecessary calls to @fn_gl{BindVertexArray}.
+unnecessary calls to @fn_gl{BindVertexArray}. %Mesh limits and
+implementation-defined values (such as @ref maxVertexAttributes()) are cached,
+so repeated queries don't result in repeated @fn_gl{Get} calls.
 
 If extension @extension{EXT,direct_state_access} and VAOs are available,
 DSA functions are used for specifying attribute locations to avoid unnecessary
@@ -326,6 +328,40 @@ class MAGNUM_EXPORT Mesh {
             UnsignedInt = GL_UNSIGNED_INT
         };
 
+        /**
+         * @brief Max supported vertex attribute count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. This function is in fact alias to
+         * @ref AbstractShaderProgram::maxVertexAttributes().
+         * @see @ref addVertexBuffer()
+         */
+        static Int maxVertexAttributes();
+
+        #ifndef MAGNUM_TARGET_GLES2
+        /**
+         * @brief Max recommended index count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls.
+         * @see @ref setIndexBuffer(), @fn_gl{Get} with @def_gl{MAX_ELEMENTS_INDICES}
+         * @requires_gles30 Ranged element draw is not supported in OpenGL ES
+         *      2.0.
+         */
+        static Int maxElementsIndices();
+
+        /**
+         * @brief Max recommended vertex count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls.
+         * @see @ref setIndexBuffer(), @fn_gl{Get} with @def_gl{MAX_ELEMENTS_VERTICES}
+         * @requires_gles30 Ranged element draw is not supported in OpenGL ES
+         *      2.0.
+         */
+        static Int maxElementsVertices();
+        #endif
+
         /**
          * @brief Size of given index type
          *
@@ -466,7 +502,8 @@ class MAGNUM_EXPORT Mesh {
          *      mesh, you must ensure it will exist for whole lifetime of the
          *      mesh and delete it afterwards.
          *
-         * @see setPrimitive(), setVertexCount(), @fn_gl{BindVertexArray},
+         * @see @ref maxVertexAttributes(), @ref setPrimitive(),
+         *      @ref setVertexCount(), @fn_gl{BindVertexArray},
          *      @fn_gl{EnableVertexAttribArray}, @fn_gl{BindBuffer},
          *      @fn_gl{VertexAttribPointer} or
          *      @fn_gl_extension{EnableVertexArrayAttrib,EXT,direct_state_access},
@@ -495,7 +532,8 @@ class MAGNUM_EXPORT Mesh {
          * On OpenGL ES 2.0 this function behaves always as
          * setIndexBuffer(Buffer*, GLintptr, IndexType), as this functionality
          * is not available there.
-         * @see setIndexCount(), MeshTools::compressIndices(),
+         * @see @ref maxElementsIndices(), @ref maxElementsVertices(),
+         *      @ref setIndexCount(), @ref MeshTools::compressIndices(),
          *      @fn_gl{BindVertexArray}, @fn_gl{BindBuffer} (if
          *      @extension{APPLE,vertex_array_object} is available)
          */

src/Platform/magnum-info.cpp

@@ -29,7 +29,14 @@
 #include <Utility/NaClStreamBuffer.h>
 #endif
 
+#include "AbstractShaderProgram.h"
+#include "Buffer.h"
 #include "Context.h"
+#include "Extensions.h"
+#include "Framebuffer.h"
+#include "Mesh.h"
+#include "Renderbuffer.h"
+#include "Shader.h"
 #ifndef CORRADE_TARGET_NACL
 #include "Platform/WindowlessGlxApplication.h"
 #else
@@ -49,6 +56,8 @@ MagnumInfo::MagnumInfo(const Arguments& arguments): Platform::WindowlessApplicat
     Utility::Arguments args;
     args.addBooleanOption("all-extensions")
         .setHelp("all-extensions", "show extensions also for fully supported versions")
+        .addBooleanOption("no-limits")
+        .setHelp("no-limits", "don't display limits and implementation-defined values")
         .setHelp("Displays information about Magnum engine and OpenGL capabilities.");
 
     /**
@@ -179,6 +188,176 @@ MagnumInfo::MagnumInfo(const Arguments& arguments): Platform::WindowlessApplicat
 
         Debug() << "";
     }
+
+    if(args.isSet("no-limits")) return;
+
+    /* Limits and implementation-defined values */
+    #define _h(val) Debug() << "\n " << Extensions::GL::val::string() + std::string(":");
+    #define _l(val) Debug() << "   " << #val << (sizeof(#val) > 64 ? "\n" + std::string(68, ' ') : std::string(64 - sizeof(#val), ' ')) << val;
+
+    Debug() << "Limits and implementation-defined values:";
+    _l(AbstractFramebuffer::maxViewportSize())
+    _l(AbstractFramebuffer::maxDrawBuffers())
+    _l(Framebuffer::maxColorAttachments())
+    #ifndef MAGNUM_TARGET_GLES2
+    _l(Mesh::maxElementsIndices())
+    _l(Mesh::maxElementsVertices())
+    #endif
+    _l(Renderbuffer::maxSize())
+    _l(Renderbuffer::maxSamples())
+    _l(Shader::maxVertexOutputComponents())
+    _l(Shader::maxFragmentInputComponents())
+    _l(Shader::maxTextureImageUnits(Shader::Type::Vertex))
+    #ifndef MAGNUM_TARGET_GLES
+    _l(Shader::maxTextureImageUnits(Shader::Type::TessellationControl))
+    _l(Shader::maxTextureImageUnits(Shader::Type::TessellationEvaluation))
+    _l(Shader::maxTextureImageUnits(Shader::Type::Geometry))
+    _l(Shader::maxTextureImageUnits(Shader::Type::Compute))
+    #endif
+    _l(Shader::maxTextureImageUnits(Shader::Type::Fragment))
+    _l(Shader::maxCombinedTextureImageUnits())
+    _l(Shader::maxUniformComponents(Shader::Type::Vertex))
+    #ifndef MAGNUM_TARGET_GLES
+    _l(Shader::maxUniformComponents(Shader::Type::TessellationControl))
+    _l(Shader::maxUniformComponents(Shader::Type::TessellationEvaluation))
+    _l(Shader::maxUniformComponents(Shader::Type::Geometry))
+    _l(Shader::maxUniformComponents(Shader::Type::Compute))
+    #endif
+    _l(Shader::maxUniformComponents(Shader::Type::Fragment))
+    #ifndef MAGNUM_TARGET_GLES
+    _l(AbstractShaderProgram::maxUniformLocations())
+    #endif
+    _l(AbstractShaderProgram::maxVertexAttributes())
+    #ifndef MAGNUM_TARGET_GLES
+    _l(AbstractTexture::maxColorSamples())
+    _l(AbstractTexture::maxDepthSamples())
+    _l(AbstractTexture::maxIntegerSamples())
+    #endif
+
+    #ifndef MAGNUM_TARGET_GLES
+    if(c->isExtensionSupported<Extensions::GL::ARB::blend_func_extended>()) {
+        _h(ARB::blend_func_extended)
+
+        _l(AbstractFramebuffer::maxDualSourceDrawBuffers())
+    }
+
+    if(c->isExtensionSupported<Extensions::GL::ARB::compute_shader>()) {
+        _h(ARB::compute_shader)
+
+        _l(AbstractShaderProgram::maxComputeSharedMemorySize())
+        _l(AbstractShaderProgram::maxComputeWorkGroupInvocations())
+    }
+
+    if(c->isExtensionSupported<Extensions::GL::ARB::geometry_shader4>()) {
+        _h(ARB::geometry_shader4)
+
+        _l(Shader::maxGeometryInputComponents())
+        _l(Shader::maxGeometryOutputComponents())
+        _l(Shader::maxGeometryTotalOutputComponents())
+    }
+
+    if(c->isExtensionSupported<Extensions::GL::ARB::shader_atomic_counters>()) {
+        _h(ARB::shader_atomic_counters)
+
+        _l(Buffer::maxAtomicCounterBindings())
+        _l(Shader::maxAtomicCounterBuffers(Shader::Type::Vertex))
+        _l(Shader::maxAtomicCounterBuffers(Shader::Type::TessellationControl))
+        _l(Shader::maxAtomicCounterBuffers(Shader::Type::TessellationEvaluation))
+        _l(Shader::maxAtomicCounterBuffers(Shader::Type::Geometry))
+        _l(Shader::maxAtomicCounterBuffers(Shader::Type::Compute))
+        _l(Shader::maxAtomicCounterBuffers(Shader::Type::Fragment))
+        _l(Shader::maxCombinedAtomicCounterBuffers())
+        _l(Shader::maxAtomicCounters(Shader::Type::Vertex))
+        _l(Shader::maxAtomicCounters(Shader::Type::TessellationControl))
+        _l(Shader::maxAtomicCounters(Shader::Type::TessellationEvaluation))
+        _l(Shader::maxAtomicCounters(Shader::Type::Geometry))
+        _l(Shader::maxAtomicCounters(Shader::Type::Compute))
+        _l(Shader::maxAtomicCounters(Shader::Type::Fragment))
+        _l(Shader::maxCombinedAtomicCounters())
+        _l(AbstractShaderProgram::maxAtomicCounterBufferSize())
+    }
+
+    if(c->isExtensionSupported<Extensions::GL::ARB::shader_image_load_store>()) {
+        _h(ARB::shader_image_load_store)
+
+        _l(Shader::maxImageUniforms(Shader::Type::Vertex))
+        _l(Shader::maxImageUniforms(Shader::Type::TessellationControl))
+        _l(Shader::maxImageUniforms(Shader::Type::TessellationEvaluation))
+        _l(Shader::maxImageUniforms(Shader::Type::Geometry))
+        _l(Shader::maxImageUniforms(Shader::Type::Compute))
+        _l(Shader::maxImageUniforms(Shader::Type::Fragment))
+        _l(Shader::maxCombinedImageUniforms())
+        _l(AbstractShaderProgram::maxCombinedShaderOutputResources())
+        _l(AbstractShaderProgram::maxImageUnits())
+        _l(AbstractShaderProgram::maxImageSamples())
+    }
+
+    if(c->isExtensionSupported<Extensions::GL::ARB::shader_storage_buffer_object>()) {
+        _h(ARB::shader_storage_buffer_object)
+
+        _l(Shader::maxShaderStorageBlocks(Shader::Type::Vertex))
+        _l(Shader::maxShaderStorageBlocks(Shader::Type::TessellationControl))
+        _l(Shader::maxShaderStorageBlocks(Shader::Type::TessellationEvaluation))
+        _l(Shader::maxShaderStorageBlocks(Shader::Type::Geometry))
+        _l(Shader::maxShaderStorageBlocks(Shader::Type::Compute))
+        _l(Shader::maxShaderStorageBlocks(Shader::Type::Fragment))
+        _l(Shader::maxCombinedShaderStorageBlocks())
+        /* AbstractShaderProgram::maxCombinedShaderOutputResources() already in shader_image_load_store */
+        _l(AbstractShaderProgram::maxShaderStorageBlockSize())
+    }
+
+    if(c->isExtensionSupported<Extensions::GL::ARB::tessellation_shader>()) {
+        _h(ARB::tessellation_shader)
+
+        _l(Buffer::shaderStorageOffsetAlignment())
+        _l(Buffer::maxShaderStorageBindings())
+        _l(Shader::maxTessellationControlInputComponents())
+        _l(Shader::maxTessellationControlOutputComponents())
+        _l(Shader::maxTessellationControlTotalOutputComponents())
+        _l(Shader::maxTessellationEvaluationInputComponents())
+        _l(Shader::maxTessellationEvaluationOutputComponents())
+    }
+    #endif
+
+    #ifndef MAGNUM_TARGET_GLES2
+    if(c->isExtensionSupported<Extensions::GL::ARB::uniform_buffer_object>()) {
+        _h(ARB::uniform_buffer_object)
+
+        _l(Shader::maxUniformBlocks(Shader::Type::Vertex))
+        _l(Shader::maxUniformBlocks(Shader::Type::TessellationControl))
+        _l(Shader::maxUniformBlocks(Shader::Type::TessellationEvaluation))
+        _l(Shader::maxUniformBlocks(Shader::Type::Geometry))
+        _l(Shader::maxUniformBlocks(Shader::Type::Compute))
+        _l(Shader::maxUniformBlocks(Shader::Type::Fragment))
+        _l(Shader::maxCombinedUniformBlocks())
+        _l(Shader::maxCombinedUniformComponents(Shader::Type::Vertex))
+        _l(Shader::maxCombinedUniformComponents(Shader::Type::TessellationControl))
+        _l(Shader::maxCombinedUniformComponents(Shader::Type::TessellationEvaluation))
+        _l(Shader::maxCombinedUniformComponents(Shader::Type::Geometry))
+        _l(Shader::maxCombinedUniformComponents(Shader::Type::Compute))
+        _l(Shader::maxCombinedUniformComponents(Shader::Type::Fragment))
+        _l(AbstractShaderProgram::maxUniformBlockSize())
+    }
+
+    if(c->isExtensionSupported<Extensions::GL::EXT::gpu_shader4>()) {
+        _h(EXT::gpu_shader4)
+
+        _l(Buffer::maxUniformBindings())
+        _l(AbstractShaderProgram::minTexelOffset())
+        _l(AbstractShaderProgram::maxTexelOffset())
+    }
+    #endif
+
+    #ifndef MAGNUM_TARGET_GLES3
+    if(c->isExtensionSupported<Extensions::GL::EXT::texture_filter_anisotropic>()) {
+        _h(EXT::texture_filter_anisotropic)
+
+        _l(Sampler::maxAnisotropy())
+    }
+    #endif
+
+    #undef _l
+    #undef _h
 }
 
 }

src/Renderbuffer.cpp

@@ -40,6 +40,36 @@ Renderbuffer::StorageMultisampleImplementation Renderbuffer::storageMultisampleI
     nullptr;
     #endif
 
+Int Renderbuffer::maxSize() {
+    GLint& value = Context::current()->state().framebuffer->maxRenderbufferSize;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_RENDERBUFFER_SIZE, &value);
+
+    return value;
+}
+
+Int Renderbuffer::maxSamples() {
+    #ifdef MAGNUM_TARGET_GLES2
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ANGLE::framebuffer_multisample>() && !Context::current()->isExtensionSupported<Extensions::GL::NV::framebuffer_multisample>())
+        return 0;
+    #endif
+
+    GLint& value = Context::current()->state().framebuffer->maxSamples;
+
+    /* Get the value, if not already cached */
+    if(value == 0) {
+        #ifndef MAGNUM_TARGET_GLES2
+        glGetIntegerv(GL_MAX_SAMPLES, &value);
+        #else
+        glGetIntegerv(GL_MAX_SAMPLES_NV, &value);
+        #endif
+    }
+
+    return value;
+}
+
 Renderbuffer::~Renderbuffer() {
     /* If bound, remove itself from state */
     GLuint& binding = Context::current()->state().framebuffer->renderbufferBinding;

src/Renderbuffer.h

@@ -47,10 +47,12 @@ for more information.
 @section Renderbuffer-performance-optimization Performance optimizations
 
 The engine tracks currently bound renderbuffer to avoid unnecessary calls to
-@fn_gl{BindRenderbuffer} in setStorage().
+@fn_gl{BindRenderbuffer} in setStorage(). %Renderbuffer limits and
+implementation-defined values (such as @ref maxSize()) are cached, so repeated
+queries don't result in repeated @fn_gl{Get} calls.
 
 If extension @extension{EXT,direct_state_access} is available, function
-setStorage() uses DSA to avoid unnecessary calls to @fn_gl{BindFramebuffer}.
+setStorage() uses DSA to avoid unnecessary calls to @fn_gl{BindRenderbuffer}.
 See its documentation for more information.
 
 @requires_gl30 %Extension @extension{ARB,framebuffer_object}
@@ -64,6 +66,27 @@ class MAGNUM_EXPORT Renderbuffer {
     Renderbuffer& operator=(Renderbuffer&&) = delete;
 
     public:
+        /**
+         * @brief Max supported renderbuffer size
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls.
+         * @see @ref setStorage(), @ref setStorageMultisample(), @fn_gl{Get}
+         *      with @def_gl{MAX_RENDERBUFFER_SIZE}
+         */
+        static Int maxSize();
+
+        /**
+         * @brief Max supported sample count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If ES extension @es_extension{ANGLE,framebuffer_multisample}
+         * or @es_extension{NV,framebuffer_multisample} is not available,
+         * returns `0`.
+         * @see @ref setStorageMultisample(), @fn_gl{Get} with @def_gl{MAX_SAMPLES}
+         */
+        static Int maxSamples();
+
         /**
          * @brief Constructor
          *
@@ -91,8 +114,8 @@ class MAGNUM_EXPORT Renderbuffer {
          * If @extension{EXT,direct_state_access} is not available and the
          * framebufferbuffer is not currently bound, it is bound before the
          * operation.
-         * @see @fn_gl{BindRenderbuffer}, @fn_gl{RenderbufferStorage} or
-         *      @fn_gl_extension{NamedRenderbufferStorage,EXT,direct_state_access}
+         * @see @ref maxSize(), @fn_gl{BindRenderbuffer}, @fn_gl{RenderbufferStorage}
+         *      or @fn_gl_extension{NamedRenderbufferStorage,EXT,direct_state_access}
          */
         void setStorage(RenderbufferFormat internalFormat, const Vector2i& size) {
             (this->*storageImplementation)(internalFormat, size);
@@ -107,8 +130,8 @@ class MAGNUM_EXPORT Renderbuffer {
          * If @extension{EXT,direct_state_access} is not available and the
          * framebufferbuffer is not currently bound, it is bound before the
          * operation.
-         * @see @fn_gl{BindRenderbuffer}, @fn_gl{RenderbufferStorage} or
-         *      @fn_gl_extension{NamedRenderbufferStorage,EXT,direct_state_access}
+         * @see @ref maxSize(), @ref maxSamples(), @fn_gl{BindRenderbuffer},
+         *      @fn_gl{RenderbufferStorage} or @fn_gl_extension{NamedRenderbufferStorage,EXT,direct_state_access}
          * @requires_gles30 %Extension @es_extension{ANGLE,framebuffer_multisample}
          *      or @es_extension{NV,framebuffer_multisample}
          * @todo How about @es_extension{APPLE,framebuffer_multisample}?

src/Renderer.h

@@ -40,6 +40,9 @@ namespace Magnum {
 @brief Global renderer configuration.
 
 @todo @extension{ARB,viewport_array}
+@todo `GL_POINT_SIZE_GRANULARITY`, `GL_POINT_SIZE_RANGE` (?)
+@todo `GL_STEREO`, `GL_DOUBLEBUFFER` (?)
+@todo `GL_MAX_CLIP_DISTANCES`...
 */
 class MAGNUM_EXPORT Renderer {
     friend class Context;

src/Sampler.cpp

@@ -46,8 +46,8 @@ static_assert((filter_or(Nearest, Base) == GL_NEAREST) &&
 #undef filter_or
 
 #ifndef MAGNUM_TARGET_GLES3
-Float Sampler::maxSupportedAnisotropy() {
-    GLfloat& value = Context::current()->state().texture->maxSupportedAnisotropy;
+Float Sampler::maxAnisotropy() {
+    GLfloat& value = Context::current()->state().texture->maxAnisotropy;
 
     /** @todo Re-enable when extension header is available */
     #ifndef MAGNUM_TARGET_GLES

src/Sampler.h

@@ -39,7 +39,7 @@ namespace Magnum {
 
 @see Texture, CubeMapTexture, CubeMapTextureArray
 */
-class Sampler {
+class MAGNUM_EXPORT Sampler {
     public:
         /**
          * @brief %Texture filtering
@@ -144,7 +144,14 @@ class Sampler {
          * @requires_extension %Extension @extension{EXT,texture_filter_anisotropic}
          * @requires_es_extension %Extension @es_extension2{EXT,texture_filter_anisotropic,texture_filter_anisotropic}
          */
-        static Float maxSupportedAnisotropy();
+        static Float maxAnisotropy();
+
+        /**
+         * @copybrief maxAnisotropy()
+         * @deprecated Use @ref Magnum::Shader::maxAnisotropy() "maxAnisotropy()"
+         *      instead.
+         */
+        static Float maxSupportedAnisotropy() { return maxAnisotropy(); }
         #endif
 };
 

src/SceneGraph/Test/CMakeLists.txt

@@ -24,17 +24,17 @@
 
 corrade_add_test(SceneGraphAnimableTest AnimableTest.cpp LIBRARIES MagnumSceneGraph)
 corrade_add_test(SceneGraphCameraTest CameraTest.cpp LIBRARIES MagnumSceneGraph)
-corrade_add_test(SceneGraphDualComplexTransforma___Test DualComplexTransformationTest.cpp LIBRARIES MagnumSceneGraph)
-corrade_add_test(SceneGraphDualQuaternionTransfo___Test DualQuaternionTransformationTest.cpp LIBRARIES MagnumSceneGraph)
-corrade_add_test(SceneGraphMatrixTransformation2DTest MatrixTransformation2DTest.cpp LIBRARIES MagnumSceneGraph)
-corrade_add_test(SceneGraphMatrixTransformation3DTest MatrixTransformation3DTest.cpp LIBRARIES MagnumSceneGraph)
+corrade_add_test(SceneGraphDualComplexTransfo___Test DualComplexTransformationTest.cpp LIBRARIES MagnumSceneGraph)
+corrade_add_test(SceneGraphDualQuaternionTran___Test DualQuaternionTransformationTest.cpp LIBRARIES MagnumSceneGraph)
+corrade_add_test(SceneGraphMatrixTransforma___2DTest MatrixTransformation2DTest.cpp LIBRARIES MagnumSceneGraph)
+corrade_add_test(SceneGraphMatrixTransforma___3DTest MatrixTransformation3DTest.cpp LIBRARIES MagnumSceneGraph)
 corrade_add_test(SceneGraphObjectTest ObjectTest.cpp LIBRARIES MagnumSceneGraphTestLib)
-corrade_add_test(SceneGraphRigidMatrixTransfor___2DTest RigidMatrixTransformation2DTest.cpp LIBRARIES MagnumSceneGraph)
-corrade_add_test(SceneGraphRigidMatrixTransfor___3DTest RigidMatrixTransformation3DTest.cpp LIBRARIES MagnumSceneGraph)
+corrade_add_test(SceneGraphRigidMatrixTrans___2DTest RigidMatrixTransformation2DTest.cpp LIBRARIES MagnumSceneGraph)
+corrade_add_test(SceneGraphRigidMatrixTrans___3DTest RigidMatrixTransformation3DTest.cpp LIBRARIES MagnumSceneGraph)
 corrade_add_test(SceneGraphSceneTest SceneTest.cpp LIBRARIES MagnumSceneGraph)
 
-set_target_properties(SceneGraphDualComplexTransforma___Test
-    SceneGraphDualQuaternionTransfo___Test
-    SceneGraphRigidMatrixTransfor___2DTest
-    SceneGraphRigidMatrixTransfor___3DTest
+set_target_properties(SceneGraphDualComplexTransfo___Test
+    SceneGraphDualQuaternionTran___Test
+    SceneGraphRigidMatrixTrans___2DTest
+    SceneGraphRigidMatrixTrans___3DTest
     PROPERTIES COMPILE_FLAGS "-DCORRADE_GRACEFUL_ASSERT")

src/Shader.cpp

@@ -27,6 +27,10 @@
 #include <fstream>
 #include <Utility/Assert.h>
 
+#include "Extensions.h"
+#include "Implementation/State.h"
+#include "Implementation/ShaderState.h"
+
 #if defined(CORRADE_TARGET_NACL_NEWLIB) || defined(_WIN32)
 #include <sstream>
 #endif
@@ -55,7 +59,479 @@ std::string shaderName(const Shader::Type type) {
     CORRADE_ASSERT_UNREACHABLE();
 }
 
+UnsignedInt typeToIndex(const Shader::Type type) {
+    switch(type) {
+        case Shader::Type::Vertex:                  return 0;
+        case Shader::Type::Fragment:                return 1;
+        #ifndef MAGNUM_TARGET_GLES
+        case Shader::Type::Geometry:                return 2;
+        case Shader::Type::TessellationControl:     return 3;
+        case Shader::Type::TessellationEvaluation:  return 4;
+        case Shader::Type::Compute:                 return 5;
+        #endif
+    }
+
+    CORRADE_ASSERT_UNREACHABLE();
+}
+
+#ifndef MAGNUM_TARGET_GLES
+bool isTypeSupported(const Shader::Type type) {
+    if(type == Shader::Type::Geometry && !Context::current()->isExtensionSupported<Extensions::GL::ARB::geometry_shader4>())
+        return false;
+
+    if((type == Shader::Type::TessellationControl || type == Shader::Type::TessellationEvaluation) && !Context::current()->isExtensionSupported<Extensions::GL::ARB::tessellation_shader>())
+        return false;
+
+    if(type == Shader::Type::Compute && !Context::current()->isExtensionSupported<Extensions::GL::ARB::compute_shader>())
+        return false;
+
+    return true;
 }
+#else
+constexpr bool isTypeSupported(Shader::Type) { return true; }
+#endif
+
+}
+
+Int Shader::maxVertexOutputComponents() {
+    GLint& value = Context::current()->state().shader->maxVertexOutputComponents;
+
+    /* Get the value, if not already cached */
+    if(value == 0) {
+        #ifndef MAGNUM_TARGET_GLES
+        if(Context::current()->isVersionSupported(Version::GL320))
+            glGetIntegerv(GL_MAX_VERTEX_OUTPUT_COMPONENTS, &value);
+        else
+            glGetIntegerv(GL_MAX_VARYING_COMPONENTS, &value);
+        #elif defined(MAGNUM_TARGET_GLES2)
+        glGetIntegerv(GL_MAX_VARYING_VECTORS, &value);
+        value *= 4;
+        #else
+        glGetIntegerv(GL_MAX_VERTEX_OUTPUT_COMPONENTS, &value);
+        #endif
+    }
+
+    return value;
+}
+
+#ifndef MAGNUM_TARGET_GLES
+Int Shader::maxTessellationControlInputComponents() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::tessellation_shader>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxTessellationControlInputComponents;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_TESS_CONTROL_INPUT_COMPONENTS, &value);
+
+    return value;
+}
+
+Int Shader::maxTessellationControlOutputComponents() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::tessellation_shader>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxTessellationControlOutputComponents;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_TESS_CONTROL_OUTPUT_COMPONENTS, &value);
+
+    return value;
+}
+
+Int Shader::maxTessellationControlTotalOutputComponents() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::tessellation_shader>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxTessellationControlTotalOutputComponents;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS, &value);
+
+    return value;
+}
+
+Int Shader::maxTessellationEvaluationInputComponents() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::tessellation_shader>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxTessellationEvaluationInputComponents;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_TESS_EVALUATION_INPUT_COMPONENTS, &value);
+
+    return value;
+}
+
+Int Shader::maxTessellationEvaluationOutputComponents() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::tessellation_shader>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxTessellationEvaluationOutputComponents;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_TESS_EVALUATION_OUTPUT_COMPONENTS, &value);
+
+    return value;
+}
+
+Int Shader::maxGeometryInputComponents() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::geometry_shader4>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxGeometryInputComponents;
+
+    /* Get the value, if not already cached */
+    /** @todo The extension has only `GL_MAX_GEOMETRY_VARYING_COMPONENTS_ARB`, this is supported since GL 3.2 (wtf?) */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_GEOMETRY_INPUT_COMPONENTS, &value);
+
+    return value;
+}
+
+Int Shader::maxGeometryOutputComponents() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::geometry_shader4>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxGeometryOutputComponents;
+
+    /* Get the value, if not already cached */
+    /** @todo The extension has only `GL_MAX_GEOMETRY_OUTPUT_VERTICES_ARB`, this is supported since GL 3.2 (wtf?) */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_GEOMETRY_OUTPUT_COMPONENTS, &value);
+
+    return value;
+}
+
+Int Shader::maxGeometryTotalOutputComponents() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::geometry_shader4>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxGeometryTotalOutputComponents;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS, &value);
+
+    return value;
+}
+#endif
+
+Int Shader::maxFragmentInputComponents() {
+    GLint& value = Context::current()->state().shader->maxFragmentInputComponents;
+
+    /* Get the value, if not already cached */
+    if(value == 0) {
+        #ifndef MAGNUM_TARGET_GLES
+        if(Context::current()->isVersionSupported(Version::GL320))
+            glGetIntegerv(GL_MAX_FRAGMENT_INPUT_COMPONENTS, &value);
+        else
+            glGetIntegerv(GL_MAX_VARYING_COMPONENTS, &value);
+        #elif defined(MAGNUM_TARGET_GLES2)
+        glGetIntegerv(GL_MAX_VARYING_VECTORS, &value);
+        value *= 4;
+        #else
+        glGetIntegerv(GL_MAX_FRAGMENT_INPUT_COMPONENTS, &value);
+        #endif
+    }
+
+    return value;
+}
+
+#ifndef MAGNUM_TARGET_GLES
+Int Shader::maxAtomicCounterBuffers(const Type type) {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_atomic_counters>() || !isTypeSupported(type))
+        return 0;
+
+    const UnsignedInt index = typeToIndex(type);
+    GLint& value = Context::current()->state().shader->maxAtomicCounterBuffers[index];
+
+    /* Get the value, if not already cached */
+    constexpr static const GLenum what[] = {
+        GL_MAX_VERTEX_ATOMIC_COUNTER_BUFFERS,
+        GL_MAX_FRAGMENT_ATOMIC_COUNTER_BUFFERS,
+        GL_MAX_GEOMETRY_ATOMIC_COUNTER_BUFFERS,
+        GL_MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS,
+        GL_MAX_TESS_EVALUATION_ATOMIC_COUNTER_BUFFERS,
+        GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS
+    };
+    if(value == 0)
+        glGetIntegerv(what[index], &value);
+
+    return value;
+}
+
+Int Shader::maxCombinedAtomicCounterBuffers() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_atomic_counters>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxCombinedAtomicCounterBuffers;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_COMBINED_ATOMIC_COUNTER_BUFFERS, &value);
+
+    return value;
+}
+
+Int Shader::maxAtomicCounters(const Type type) {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_atomic_counters>() || !isTypeSupported(type))
+        return 0;
+
+    const UnsignedInt index = typeToIndex(type);
+    GLint& value = Context::current()->state().shader->maxAtomicCounters[index];
+
+    /* Get the value, if not already cached */
+    constexpr static const GLenum what[] = {
+        GL_MAX_VERTEX_ATOMIC_COUNTERS,
+        GL_MAX_FRAGMENT_ATOMIC_COUNTERS,
+        GL_MAX_GEOMETRY_ATOMIC_COUNTERS,
+        GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS,
+        GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS,
+        GL_MAX_COMPUTE_ATOMIC_COUNTERS
+    };
+    if(value == 0)
+        glGetIntegerv(what[index], &value);
+
+    return value;
+}
+
+Int Shader::maxCombinedAtomicCounters() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_atomic_counters>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxCombinedAtomicCounters;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_COMBINED_ATOMIC_COUNTERS, &value);
+
+    return value;
+}
+
+Int Shader::maxImageUniforms(const Type type) {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_image_load_store>() || !isTypeSupported(type))
+        return 0;
+
+    const UnsignedInt index = typeToIndex(type);
+    GLint& value = Context::current()->state().shader->maxImageUniforms[index];
+
+    /* Get the value, if not already cached */
+    constexpr static const GLenum what[] = {
+        GL_MAX_VERTEX_IMAGE_UNIFORMS,
+        GL_MAX_FRAGMENT_IMAGE_UNIFORMS,
+        GL_MAX_GEOMETRY_IMAGE_UNIFORMS,
+        GL_MAX_TESS_CONTROL_IMAGE_UNIFORMS,
+        GL_MAX_TESS_EVALUATION_IMAGE_UNIFORMS,
+        GL_MAX_COMPUTE_IMAGE_UNIFORMS
+    };
+    if(value == 0)
+        glGetIntegerv(what[index], &value);
+
+    return value;
+}
+
+Int Shader::maxCombinedImageUniforms() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_image_load_store>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxCombinedImageUniforms;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_COMBINED_IMAGE_UNIFORMS, &value);
+
+    return value;
+}
+
+Int Shader::maxShaderStorageBlocks(const Type type) {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_storage_buffer_object>() || !isTypeSupported(type))
+        return 0;
+
+    const UnsignedInt index = typeToIndex(type);
+    GLint& value = Context::current()->state().shader->maxShaderStorageBlocks[index];
+
+    /* Get the value, if not already cached */
+    constexpr static const GLenum what[] = {
+        GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS,
+        GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS,
+        GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS,
+        GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS,
+        GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS,
+        GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS
+    };
+    if(value == 0)
+        glGetIntegerv(what[index], &value);
+
+    return value;
+}
+
+Int Shader::maxCombinedShaderStorageBlocks() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shader_atomic_counters>())
+        return 0;
+
+    GLint& value = Context::current()->state().shader->maxCombinedShaderStorageBlocks;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS, &value);
+
+    return value;
+}
+#endif
+
+Int Shader::maxTextureImageUnits(const Type type) {
+    if(!isTypeSupported(type))
+        return 0;
+
+    const UnsignedInt index = typeToIndex(type);
+    GLint& value = Context::current()->state().shader->maxTextureImageUnits[index];
+
+    /* Get the value, if not already cached */
+    constexpr static const GLenum what[] = {
+        GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS,
+        GL_MAX_TEXTURE_IMAGE_UNITS,
+        #ifndef MAGNUM_TARGET_GLES
+        GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS,
+        GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS,
+        GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS,
+        GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS
+        #endif
+    };
+    if(value == 0)
+        glGetIntegerv(what[index], &value);
+
+    return value;
+}
+
+Int Shader::maxCombinedTextureImageUnits() {
+    GLint& value = Context::current()->state().shader->maxTextureImageUnitsCombined;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &value);
+
+    return value;
+}
+
+#ifndef MAGNUM_TARGET_GLES2
+Int Shader::maxUniformBlocks(const Type type) {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::uniform_buffer_object>() || !isTypeSupported(type))
+    #else
+    if(!isTypeSupported(type))
+    #endif
+        return 0;
+
+    const UnsignedInt index = typeToIndex(type);
+    GLint& value = Context::current()->state().shader->maxUniformBlocks[index];
+
+    /* Get the value, if not already cached */
+    constexpr static const GLenum what[] = {
+        GL_MAX_VERTEX_UNIFORM_BLOCKS,
+        GL_MAX_FRAGMENT_UNIFORM_BLOCKS,
+        #ifndef MAGNUM_TARGET_GLES
+        /** @todo Fix this when glLoadGen has GL_MAX_GEOMETRY_UNIFORM_BLOCKS enum */
+        0x8A2C /*GL_MAX_GEOMETRY_UNIFORM_BLOCKS*/,
+        GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS,
+        GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS,
+        GL_MAX_COMPUTE_UNIFORM_BLOCKS
+        #endif
+    };
+    if(value == 0)
+        glGetIntegerv(what[index], &value);
+
+    return value;
+}
+
+Int Shader::maxCombinedUniformBlocks() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::uniform_buffer_object>())
+        return 0;
+    #endif
+
+    GLint& value = Context::current()->state().shader->maxCombinedUniformBlocks;
+
+    /* Get the value, if not already cached */
+    if(value == 0)
+        glGetIntegerv(GL_MAX_COMBINED_UNIFORM_BLOCKS, &value);
+
+    return value;
+}
+#endif
+
+Int Shader::maxUniformComponents(const Type type) {
+    if(!isTypeSupported(type))
+        return 0;
+
+    const UnsignedInt index = typeToIndex(type);
+    GLint& value = Context::current()->state().shader->maxUniformComponents[index];
+
+    /* Get the value, if not already cached */
+    #ifndef MAGNUM_TARGET_GLES2
+    constexpr static const GLenum what[] = {
+        GL_MAX_VERTEX_UNIFORM_COMPONENTS,
+        GL_MAX_FRAGMENT_UNIFORM_COMPONENTS,
+        #ifndef MAGNUM_TARGET_GLES
+        GL_MAX_GEOMETRY_UNIFORM_COMPONENTS,
+        GL_MAX_TESS_CONTROL_UNIFORM_COMPONENTS,
+        GL_MAX_TESS_EVALUATION_UNIFORM_COMPONENTS,
+        GL_MAX_COMPUTE_UNIFORM_COMPONENTS
+        #endif
+    };
+    if(value == 0)
+        glGetIntegerv(what[index], &value);
+    #else
+    /* For ES2 we need to multiply _VECTORS by 4 */
+    constexpr static const GLenum what[] = {
+        GL_MAX_VERTEX_UNIFORM_VECTORS,
+        GL_MAX_FRAGMENT_UNIFORM_VECTORS
+    };
+    if(value == 0) {
+        GLint vectors;
+        glGetIntegerv(what[index], &vectors);
+        value = vectors*4;
+    }
+    #endif
+
+    return value;
+}
+
+#ifndef MAGNUM_TARGET_GLES2
+Int Shader::maxCombinedUniformComponents(const Type type) {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::uniform_buffer_object>() || !isTypeSupported(type))
+    #else
+    if(!isTypeSupported(type))
+    #endif
+        return 0;
+
+    const UnsignedInt index = typeToIndex(type);
+    GLint& value = Context::current()->state().shader->maxCombinedUniformComponents[index];
+
+    /* Get the value, if not already cached */
+    constexpr static const GLenum what[] = {
+        GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS,
+        GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS,
+        #ifndef MAGNUM_TARGET_GLES
+        /** @todo Fix this when glLoadGen has GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS enum */
+        0x8A32 /*GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS*/,
+        GL_MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS,
+        GL_MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS,
+        GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS
+        #endif
+    };
+    if(value == 0)
+        glGetIntegerv(what[index], &value);
+
+    return value;
+}
+#endif
 
 Shader::Shader(const Version version, const Type type): _type(type), _id(0) {
     _id = glCreateShader(static_cast<GLenum>(_type));

src/Shader.h

@@ -48,7 +48,19 @@ class MAGNUM_EXPORT Shader {
     Shader& operator=(const Shader&) = delete;
 
     public:
-        /** @brief %Shader type */
+        /**
+         * @brief %Shader type
+         *
+         * @see @ref Shader(Version, Type),
+         *      @ref maxAtomicCounterBuffers(),
+         *      @ref maxAtomicCounters(),
+         *      @ref maxImageUniforms()
+         *      @ref maxShaderStorageBlocks(),
+         *      @ref maxTextureImageUnits(),
+         *      @ref maxUniformBlocks(),
+         *      @ref maxUniformComponents(),
+         *      @ref maxCombinedUniformComponents()
+         */
         enum class Type: GLenum {
             Vertex = GL_VERTEX_SHADER,      /**< Vertex shader */
 
@@ -85,6 +97,337 @@ class MAGNUM_EXPORT Shader {
             Fragment = GL_FRAGMENT_SHADER   /**< Fragment shader */
         };
 
+        /**
+         * @brief Max supported component count on vertex shader output
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. In OpenGL ES 2.0 the four-component vector count is
+         * queried and multiplied with 4.
+         * @see @fn_gl{Get} with @def_gl{MAX_VERTEX_OUTPUT_COMPONENTS},
+         *      @def_gl{MAX_VARYING_COMPONENTS} in OpenGL <3.2 or
+         *      @def_gl{MAX_VARYING_VECTORS} in OpenGL ES 2.0
+         */
+        static Int maxVertexOutputComponents();
+
+        /** @todo `GL_MAX_PATCH_VERTICES`, `GL_MAX_TESS_GEN_LEVEL`, `GL_MAX_TESS_PATCH_COMPONENTS` when @extension{ARB,tessellation_shader} is done */
+
+        #ifndef MAGNUM_TARGET_GLES
+        /**
+         * @brief Max supported component count of tessellation control shader input vertex
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,tessellation_shader}
+         * is not available, returns `0`.
+         * @requires_gl Tessellation shaders are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_TESS_CONTROL_INPUT_COMPONENTS}
+         */
+        static Int maxTessellationControlInputComponents();
+
+        /**
+         * @brief Max supported component count of tessellation control shader output vertex
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,tessellation_shader}
+         * is not available, returns `0`.
+         * @requires_gl Tessellation shaders are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_TESS_CONTROL_OUTPUT_COMPONENTS}
+         */
+        static Int maxTessellationControlOutputComponents();
+
+        /**
+         * @brief Max supported component count of all tessellation control shader output vertices combined
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,tessellation_shader}
+         * is not available, returns `0`.
+         * @requires_gl Tessellation shaders are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS}
+         */
+        static Int maxTessellationControlTotalOutputComponents();
+
+        /**
+         * @brief Max supported component count of tessellation evaluation shader input vertex
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,tessellation_shader}
+         * is not available, returns `0`.
+         * @requires_gl Tessellation shaders are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_TESS_EVALUATION_INPUT_COMPONENTS}
+         */
+        static Int maxTessellationEvaluationInputComponents();
+
+        /**
+         * @brief Max supported component count of tessellation evaluation shader output vertex
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,tessellation_shader}
+         * is not available, returns `0`.
+         * @requires_gl Tessellation shaders are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_TESS_EVALUATION_OUTPUT_COMPONENTS}
+         */
+        static Int maxTessellationEvaluationOutputComponents();
+
+        /**
+         * @brief Max supported component count of geometry shader input vertex
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,geometry_shader4}
+         * is not available, returns `0`.
+         * @requires_gl Geometry shaders are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_GEOMETRY_INPUT_COMPONENTS}
+         */
+        static Int maxGeometryInputComponents();
+
+        /**
+         * @brief Max supported component count of geometry shader output vertex
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,geometry_shader4}
+         * is not available, returns `0`.
+         * @requires_gl Geometry shaders are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_GEOMETRY_OUTPUT_COMPONENTS}
+         */
+        static Int maxGeometryOutputComponents();
+
+        /**
+         * @brief Max supported component count of all geometry shader output vertices combined
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,geometry_shader4}
+         * is not available, returns `0`.
+         * @requires_gl Geometry shaders are not available in OpenGL ES.
+         * @see @fn_gl{Get} with @def_gl{MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS}
+         */
+        static Int maxGeometryTotalOutputComponents();
+        #endif
+
+        /**
+         * @brief Max supported component count on fragment shader input
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. In OpenGL ES 2.0 the four-component vector count is
+         * queried and multiplied with 4.
+         * @see @fn_gl{Get} with @def_gl{MAX_FRAGMENT_INPUT_COMPONENTS},
+         *      @def_gl{MAX_VARYING_COMPONENTS} in OpenGL <3.2 or
+         *      @def_gl{MAX_VARYING_VECTORS} in OpenGL ES 2.0
+         */
+        static Int maxFragmentInputComponents();
+
+        /**
+         * @brief Max supported uniform component count in default block
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If particular shader stage is not available, returns
+         * `0`. In OpenGL ES 2.0 the four-component vector count is queried and
+         * multiplied with 4.
+         * @see @ref maxCombinedUniformComponents(),
+         *      @fn_gl{Get} with @def_gl{MAX_VERTEX_UNIFORM_COMPONENTS},
+         *      @def_gl{MAX_TESS_CONTROL_UNIFORM_COMPOENTS},
+         *      @def_gl{MAX_TESS_EVALUATION_UNIFORM_COMPONENTS},
+         *      @def_gl{MAX_GEOMETRY_UNIFORM_COMPONENTS},
+         *      @def_gl{MAX_COMPUTE_UNIFORM_COMPONENTS},
+         *      @def_gl{MAX_FRAGMENT_UNIFORM_COMPONENTS} or
+         *      @def_gl{MAX_VERTEX_UNIFORM_VECTORS},
+         *      @def_gl{MAX_FRAGMENT_UNIFORM_VECTORS} in OpenGL ES 2.0
+         */
+        static Int maxUniformComponents(Type type);
+
+        #ifndef MAGNUM_TARGET_GLES
+        /**
+         * @brief Max supported atomic counter buffer count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_atomic_counters} or
+         * particular shader stage is not available, returns `0`.
+         * @requires_gl Atomic counters are not available in OpenGL ES.
+         * @see @ref maxCombinedAtomicCounterBuffers(), @ref maxAtomicCounters(),
+         *      @fn_gl{Get} with @def_gl{MAX_VERTEX_ATOMIC_COUNTER_BUFFERS},
+         *      @def_gl{MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS},
+         *      @def_gl{MAX_TESS_EVALUATION_ATOMIC_COUNTER_BUFFERS},
+         *      @def_gl{MAX_GEOMETRY_ATOMIC_COUNTER_BUFFERS},
+         *      @def_gl{MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS} or
+         *      @def_gl{MAX_FRAGMENT_ATOMIC_COUNTER_BUFFERS}
+         */
+        static Int maxAtomicCounterBuffers(Type type);
+
+        /**
+         * @brief Max supported atomic counter buffer count for all stages combined
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_atomic_counters} is
+         * not available, returns `0`.
+         * @requires_gl Atomic counters are not available in OpenGL ES.
+         * @see @ref maxAtomicCounterBuffers(), @ref maxCombinedAtomicCounters(),
+         *      @fn_gl{Get} with @def_gl{MAX_COMBINED_ATOMIC_COUNTER_BUFFERS}
+         */
+        static Int maxCombinedAtomicCounterBuffers();
+
+        /**
+         * @brief Max supported atomic counter count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_atomic_counters} or
+         * particular shader stage is not available, returns `0`.
+         * @requires_gl Atomic counters are not available in OpenGL ES.
+         * @see @ref maxCombinedAtomicCounters(), @ref maxAtomicCounterBuffers(),
+         *      @fn_gl{Get} with @def_gl{MAX_VERTEX_ATOMIC_COUNTERS},
+         *      @def_gl{MAX_TESS_CONTROL_ATOMIC_COUNTERS},
+         *      @def_gl{MAX_TESS_EVALUATION_ATOMIC_COUNTERS},
+         *      @def_gl{MAX_GEOMETRY_ATOMIC_COUNTERS},
+         *      @def_gl{MAX_COMPUTE_ATOMIC_COUNTERS} or
+         *      @def_gl{MAX_FRAGMENT_ATOMIC_COUNTERS}
+         */
+        static Int maxAtomicCounters(Type type);
+
+        /**
+         * @brief Max supported atomic counter count for all stages combined
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_atomic_counters} is
+         * not available, returns `0`.
+         * @requires_gl Atomic counters are not available in OpenGL ES.
+         * @see @ref maxAtomicCounters(), @ref maxCombinedAtomicCounterBuffers(),
+         *      @fn_gl{Get} with @def_gl{MAX_COMBINED_ATOMIC_COUNTERS}
+         */
+        static Int maxCombinedAtomicCounters();
+
+        /**
+         * @brief Max supported image uniform count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_image_load_store}
+         * or particular shader stage is not available, returns `0`.
+         * @requires_gl Image load/store is not available in OpenGL ES.
+         * @see @ref maxCombinedImageUniforms(),
+         *      @fn_gl{Get} with @def_gl{MAX_VERTEX_IMAGE_UNIFORMS},
+         *      @def_gl{MAX_TESS_CONTROL_IMAGE_UNIFORMS},
+         *      @def_gl{MAX_TESS_EVALUATION_IMAGE_UNIFORMS},
+         *      @def_gl{MAX_GEOMETRY_IMAGE_UNIFORMS},
+         *      @def_gl{MAX_COMPUTE_IMAGE_UNIFORMS} or
+         *      @def_gl{MAX_FRAGMENT_IMAGE_UNIFORMS}
+         */
+        static Int maxImageUniforms(Type type);
+
+        /**
+         * @brief Max supported image uniform count for all stages combined
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_image_load_store}
+         * is not available, returns `0`.
+         * @requires_gl Image load/store is not available in OpenGL ES.
+         * @see @ref maxImageUniforms(),
+         *      @fn_gl{Get} with @def_gl{MAX_COMBINED_IMAGE_UNIFORMS}
+         */
+        static Int maxCombinedImageUniforms();
+
+        /**
+         * @brief Max supported shader storage block count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_storage_buffer_object}
+         * or particular shader stage is not available, returns `0`.
+         * @requires_gl Shader storage is not available in OpenGL ES.
+         * @see @ref maxCombinedShaderStorageBlocks(),
+         *      @fn_gl{Get} with @def_gl{MAX_VERTEX_SHADER_STORAGE_BLOCKS},
+         *      @def_gl{MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS},
+         *      @def_gl{MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS},
+         *      @def_gl{MAX_GEOMETRY_SHADER_STORAGE_BLOCKS},
+         *      @def_gl{MAX_COMPUTE_SHADER_STORAGE_BLOCKS} or
+         *      @def_gl{MAX_FRAGMENT_SHADER_STORAGE_BLOCKS}
+         */
+        static Int maxShaderStorageBlocks(Type type);
+
+        /**
+         * @brief Max supported shader storage block count for all stages combined
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,shader_storage_buffer_object}
+         * is not available, returns `0`.
+         * @requires_gl Shader storage is not available in OpenGL ES.
+         * @see @ref maxShaderStorageBlocks(),
+         *      @fn_gl{Get} with @def_gl{MAX_COMBINED_SHADER_STORAGE_BLOCKS}
+         */
+        static Int maxCombinedShaderStorageBlocks();
+        #endif
+
+        /**
+         * @brief Max supported texture image unit count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If particular shader stage is not available, returns
+         * `0`.
+         * @see @ref maxCombinedTextureImageUnits(),
+         *      @fn_gl{Get} with @def_gl{MAX_VERTEX_TEXTURE_IMAGE_UNITS},
+         *      @fn_gl{MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS},
+         *      @fn_gl{MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS},
+         *      @fn_gl{MAX_GEOMETRY_TEXTURE_IMAGE_UNITS},
+         *      @fn_gl{MAX_COMPUTE_TEXTURE_IMAGE_UNITS},
+         *      @fn_gl{MAX_TEXTURE_IMAGE_UNITS}
+         */
+        static Int maxTextureImageUnits(Type type);
+
+        /**
+         * @brief Max supported texture image unit count for all stages combined
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls.
+         * @see @ref AbstractTexture::maxLayers(), @ref maxTextureImageUnits(),
+         *      @fn_gl{Get} with @def_gl{MAX_COMBINED_TEXTURE_IMAGE_UNITS}
+         */
+        static Int maxCombinedTextureImageUnits();
+
+        #ifndef MAGNUM_TARGET_GLES2
+        /**
+         * @brief Max supported uniform block count
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,uniform_buffer_objects} or
+         * particular shader stage is not available, returns `0`.
+         * @requires_gles30 Uniform blocks are not available in OpenGL ES 2.0.
+         * @see @ref maxCombinedUniformBlocks(), @ref maxUniformComponents(),
+         *      @ref maxCombinedUniformComponents(),
+         *      @fn_gl{Get} with @def_gl{MAX_VERTEX_UNIFORM_BLOCKS},
+         *      @def_gl{MAX_TESS_CONTROL_UNIFORM_BLOCKS},
+         *      @def_gl{MAX_TESS_EVALUATION_UNIFORM_BLOCKS},
+         *      @def_gl{MAX_GEOMETRY_UNIFORM_BLOCKS},
+         *      @def_gl{MAX_COMPUTE_UNIFORM_BLOCKS} or
+         *      @def_gl{MAX_FRAGMENT_UNIFORM_BLOCKS}
+         */
+        static Int maxUniformBlocks(Type type);
+
+        /**
+         * @brief Max supported uniform block count for all stages combined
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,uniform_buffer_objects} is
+         * not available, returns `0`.
+         * @requires_gles30 Uniform blocks are not available in OpenGL ES 2.0.
+         * @see @ref maxUniformBlocks(), @ref maxUniformComponents(),
+         *      @ref maxCombinedUniformComponents(),
+         *      @fn_gl{Get} with @def_gl{MAX_COMBINED_UNIFORM_BLOCKS}
+         */
+        static Int maxCombinedUniformBlocks();
+        #endif
+
+        #ifndef MAGNUM_TARGET_GLES2
+        /**
+         * @brief Max supported uniform component count in all blocks combined
+         *
+         * The result is cached, repeated queries don't result in repeated
+         * OpenGL calls. If extension @extension{ARB,uniform_buffer_objects}
+         * or particular shader stage is not available, returns `0`.
+         * @requires_gles30 Uniform blocks are not available in OpenGL ES 2.0.
+         * @see @ref maxUniformComponents(), @ref maxUniformBlocks(),
+         *      @fn_gl{Get} with @def_gl{MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS},
+         *      @def_gl{MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS},
+         *      @def_gl{MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS},
+         *      @def_gl{MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS},
+         *      @def_gl{MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS} or
+         *      @def_gl{MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS}
+         */
+        static Int maxCombinedUniformComponents(Type type);
+        #endif
+
         /**
          * @brief Constructor
          * @param version   Target version

src/Shaders/CMakeLists.txt

@@ -58,3 +58,7 @@ target_link_libraries(MagnumShaders Magnum)
 
 install(TARGETS MagnumShaders DESTINATION ${MAGNUM_LIBRARY_INSTALL_DIR})
 install(FILES ${MagnumShaders_HEADERS} DESTINATION ${MAGNUM_INCLUDE_INSTALL_DIR}/Shaders)
+
+if(BUILD_TESTS)
+    add_subdirectory(Test)
+endif()

src/Shaders/DistanceFieldVector.cpp

@@ -44,27 +44,26 @@ template<UnsignedInt dimensions> DistanceFieldVector<dimensions>::DistanceFieldV
     /* Weird bug in GCC 4.5 - cannot use initializer list here, although the
        same thing works in PhongShader flawlessly */
     #ifndef MAGNUM_TARGET_GLES
-    std::initializer_list<Version> vs{Version::GL320, Version::GL210};
+    std::initializer_list<Version> vs{Version::GL310, Version::GL300, Version::GL210};
     #else
     std::initializer_list<Version> vs{Version::GLES300, Version::GLES200};
     #endif
-    Version v = Context::current()->supportedVersion(vs);
+    Version version = Context::current()->supportedVersion(vs);
 
-    Shader frag(v, Shader::Type::Vertex);
+    Shader frag(version, Shader::Type::Vertex);
     frag.addSource(rs.get("compatibility.glsl"))
         .addSource(rs.get(vertexShaderName<dimensions>()));
     CORRADE_INTERNAL_ASSERT_OUTPUT(frag.compile());
     AbstractShaderProgram::attachShader(frag);
 
-    Shader vert(v, Shader::Type::Fragment);
+    Shader vert(version, Shader::Type::Fragment);
     vert.addSource(rs.get("compatibility.glsl"))
         .addSource(rs.get("DistanceFieldVector.frag"));
     CORRADE_INTERNAL_ASSERT_OUTPUT(vert.compile());
     AbstractShaderProgram::attachShader(vert);
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>() ||
-        Context::current()->version() == Version::GL210)
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>(version))
     #else
     if(!Context::current()->isVersionSupported(Version::GLES300))
     #endif
@@ -76,7 +75,7 @@ template<UnsignedInt dimensions> DistanceFieldVector<dimensions>::DistanceFieldV
     CORRADE_INTERNAL_ASSERT_OUTPUT(AbstractShaderProgram::link());
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>())
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>(version))
     #endif
     {
         transformationProjectionMatrixUniform = AbstractShaderProgram::uniformLocation("transformationProjectionMatrix");
@@ -87,7 +86,7 @@ template<UnsignedInt dimensions> DistanceFieldVector<dimensions>::DistanceFieldV
     }
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shading_language_420pack>())
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shading_language_420pack>(version))
     #endif
     {
         AbstractShaderProgram::setUniform(AbstractShaderProgram::uniformLocation("vectorTexture"),

src/Shaders/Flat.cpp

@@ -43,27 +43,26 @@ template<UnsignedInt dimensions> Flat<dimensions>::Flat(): transformationProject
     /* Weird bug in GCC 4.5 - cannot use initializer list here, although the
        same thing works in PhongShader flawlessly */
     #ifndef MAGNUM_TARGET_GLES
-    std::initializer_list<Version> vs{Version::GL320, Version::GL210};
+    std::initializer_list<Version> vs{Version::GL310, Version::GL300, Version::GL210};
     #else
     std::initializer_list<Version> vs{Version::GLES300, Version::GLES200};
     #endif
-    Version v = Context::current()->supportedVersion(vs);
+    Version version = Context::current()->supportedVersion(vs);
 
-    Shader frag(v, Shader::Type::Vertex);
+    Shader frag(version, Shader::Type::Vertex);
     frag.addSource(rs.get("compatibility.glsl"))
         .addSource(rs.get(vertexShaderName<dimensions>()));
     CORRADE_INTERNAL_ASSERT_OUTPUT(frag.compile());
     attachShader(frag);
 
-    Shader vert(v, Shader::Type::Fragment);
+    Shader vert(version, Shader::Type::Fragment);
     vert.addSource(rs.get("compatibility.glsl"))
         .addSource(rs.get("Flat.frag"));
     CORRADE_INTERNAL_ASSERT_OUTPUT(vert.compile());
     attachShader(vert);
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>() ||
-        Context::current()->version() == Version::GL210)
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>(version))
     #else
     if(!Context::current()->isVersionSupported(Version::GLES300))
     #endif
@@ -74,7 +73,7 @@ template<UnsignedInt dimensions> Flat<dimensions>::Flat(): transformationProject
     CORRADE_INTERNAL_ASSERT_OUTPUT(link());
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>())
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>(version))
     #endif
     {
         transformationProjectionMatrixUniform = uniformLocation("transformationProjectionMatrix");

src/Shaders/MeshVisualizer.cpp

@@ -34,8 +34,10 @@ namespace Magnum { namespace Shaders {
 
 MeshVisualizer::MeshVisualizer(const Flags flags): flags(flags), transformationProjectionMatrixUniform(0), viewportSizeUniform(1), colorUniform(2), wireframeColorUniform(3), wireframeWidthUniform(4), smoothnessUniform(5) {
     #ifndef MAGNUM_TARGET_GLES
-    if(flags & Flag::Wireframe && !(flags & Flag::NoGeometryShader))
+    if(flags & Flag::Wireframe && !(flags & Flag::NoGeometryShader)) {
+        MAGNUM_ASSERT_VERSION_SUPPORTED(Version::GL320);
         MAGNUM_ASSERT_EXTENSION_SUPPORTED(Extensions::GL::ARB::geometry_shader4);
+    }
     #elif defined(MAGNUM_TARGET_GLES2)
     if(flags & Flag::Wireframe)
         MAGNUM_ASSERT_EXTENSION_SUPPORTED(Extensions::GL::OES::standard_derivatives);
@@ -44,12 +46,13 @@ MeshVisualizer::MeshVisualizer(const Flags flags): flags(flags), transformationP
     Utility::Resource rs("MagnumShaders");
 
     #ifndef MAGNUM_TARGET_GLES
-    const Version v = Context::current()->supportedVersion({Version::GL320, Version::GL310, Version::GL210});
+    const Version version = Context::current()->supportedVersion({Version::GL320, Version::GL310, Version::GL300, Version::GL210});
+    CORRADE_INTERNAL_ASSERT_OUTPUT(flags & Flag::NoGeometryShader || version >= Version::GL320);
     #else
-    const Version v = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
+    const Version version = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
     #endif
 
-    Shader vert(v, Shader::Type::Vertex);
+    Shader vert(version, Shader::Type::Vertex);
     vert.addSource(flags & Flag::Wireframe ? "#define WIREFRAME_RENDERING\n" : "")
         .addSource(flags & Flag::NoGeometryShader ? "#define NO_GEOMETRY_SHADER\n" : "")
         .addSource(rs.get("compatibility.glsl"))
@@ -60,7 +63,7 @@ MeshVisualizer::MeshVisualizer(const Flags flags): flags(flags), transformationP
 
     #ifndef MAGNUM_TARGET_GLES
     if(flags & Flag::Wireframe && !(flags & Flag::NoGeometryShader)) {
-        Shader geom(v, Shader::Type::Geometry);
+        Shader geom(version, Shader::Type::Geometry);
         geom.addSource(rs.get("compatibility.glsl"))
             .addSource(rs.get("MeshVisualizer.geom"));
         CORRADE_INTERNAL_ASSERT_OUTPUT(geom.compile());
@@ -69,7 +72,7 @@ MeshVisualizer::MeshVisualizer(const Flags flags): flags(flags), transformationP
     }
     #endif
 
-    Shader frag(v, Shader::Type::Fragment);
+    Shader frag(version, Shader::Type::Fragment);
     frag.addSource(flags & Flag::Wireframe ? "#define WIREFRAME_RENDERING\n" : "")
         .addSource(flags & Flag::NoGeometryShader ? "#define NO_GEOMETRY_SHADER\n" : "")
         .addSource(rs.get("compatibility.glsl"))
@@ -79,8 +82,7 @@ MeshVisualizer::MeshVisualizer(const Flags flags): flags(flags), transformationP
     attachShader(frag);
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>() ||
-        Context::current()->version() == Version::GL210)
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>(version))
     #else
     if(!Context::current()->isVersionSupported(Version::GLES300))
     #endif
@@ -99,7 +101,7 @@ MeshVisualizer::MeshVisualizer(const Flags flags): flags(flags), transformationP
     link();
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>())
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>(version))
     #endif
     {
         transformationProjectionMatrixUniform = uniformLocation("transformationProjectionMatrix");

src/Shaders/Phong.cpp

@@ -35,19 +35,19 @@ Phong::Phong(const Flags flags): transformationMatrixUniform(0), projectionMatri
     Utility::Resource rs("MagnumShaders");
 
     #ifndef MAGNUM_TARGET_GLES
-    Version v = Context::current()->supportedVersion({Version::GL320, Version::GL210});
+    const Version version = Context::current()->supportedVersion({Version::GL310, Version::GL300, Version::GL210});
     #else
-    Version v = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
+    const Version version = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
     #endif
 
-    Shader vert(v, Shader::Type::Vertex);
+    Shader vert(version, Shader::Type::Vertex);
     vert.addSource(flags ? "#define TEXTURED\n" : "")
         .addSource(rs.get("compatibility.glsl"))
         .addSource(rs.get("Phong.vert"));
     CORRADE_INTERNAL_ASSERT_OUTPUT(vert.compile());
     attachShader(vert);
 
-    Shader frag(v, Shader::Type::Fragment);
+    Shader frag(version, Shader::Type::Fragment);
     frag.addSource(flags & Flag::AmbientTexture ? "#define AMBIENT_TEXTURE\n" : "")
         .addSource(flags & Flag::DiffuseTexture ? "#define DIFFUSE_TEXTURE\n" : "")
         .addSource(flags & Flag::SpecularTexture ? "#define SPECULAR_TEXTURE\n" : "")
@@ -57,8 +57,7 @@ Phong::Phong(const Flags flags): transformationMatrixUniform(0), projectionMatri
     attachShader(frag);
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>() ||
-        Context::current()->version() == Version::GL210)
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>(version))
     #else
     if(!Context::current()->isVersionSupported(Version::GLES300))
     #endif
@@ -71,7 +70,7 @@ Phong::Phong(const Flags flags): transformationMatrixUniform(0), projectionMatri
     CORRADE_INTERNAL_ASSERT_OUTPUT(link());
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>())
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>(version))
     #endif
     {
         transformationMatrixUniform = uniformLocation("transformationMatrix");
@@ -86,7 +85,7 @@ Phong::Phong(const Flags flags): transformationMatrixUniform(0), projectionMatri
     }
 
     #ifndef MAGNUM_TARGET_GLES
-    if(flags && !Context::current()->isExtensionSupported<Extensions::GL::ARB::shading_language_420pack>())
+    if(flags && !Context::current()->isExtensionSupported<Extensions::GL::ARB::shading_language_420pack>(version))
     #endif
     {
         if(flags & Flag::AmbientTexture) setUniform(uniformLocation("ambientTexture"), AmbientTextureLayer);

src/Shaders/Phong.frag

@@ -109,11 +109,13 @@ out lowp vec4 color;
 
 void main() {
     #ifdef AMBIENT_TEXTURE
-    const vec3 ambientColor = texture(ambientTexture, interpolatedTextureCoords).xyz;
-    #elif defined(DIFFUSE_TEXTURE)
-    const vec3 diffuseColor = texture(diffuseTexture, interpolatedTextureCoords).xyz;
-    #elif defined(SPECULAR_TEXTURE)
-    const vec3 specularColor = texture(specularTexture, interpolatedTextureCoords).xyz;
+    lowp const vec3 ambientColor = texture(ambientTexture, interpolatedTextureCoords).xyz;
+    #endif
+    #ifdef DIFFUSE_TEXTURE
+    lowp const vec3 diffuseColor = texture(diffuseTexture, interpolatedTextureCoords).xyz;
+    #endif
+    #ifdef SPECULAR_TEXTURE
+    lowp const vec3 specularColor = texture(specularTexture, interpolatedTextureCoords).xyz;
     #endif
 
     /* Ambient color */

src/Shaders/Test/CMakeLists.txt

@@ -0,0 +1,32 @@
+#
+#   This file is part of Magnum.
+#
+#   Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+#
+#   Permission is hereby granted, free of charge, to any person obtaining a
+#   copy of this software and associated documentation files (the "Software"),
+#   to deal in the Software without restriction, including without limitation
+#   the rights to use, copy, modify, merge, publish, distribute, sublicense,
+#   and/or sell copies of the Software, and to permit persons to whom the
+#   Software is furnished to do so, subject to the following conditions:
+#
+#   The above copyright notice and this permission notice shall be included
+#   in all copies or substantial portions of the Software.
+#
+#   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+#   THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+#   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+#   DEALINGS IN THE SOFTWARE.
+#
+
+if(BUILD_GL_TESTS)
+    corrade_add_test(ShadersDistanceFieldVectorTest DistanceFieldVectorTest.cpp LIBRARIES MagnumShaders ${GL_TEST_LIBRARIES})
+    corrade_add_test(ShadersFlatTest FlatTest.cpp LIBRARIES MagnumShaders ${GL_TEST_LIBRARIES})
+    corrade_add_test(ShadersMeshVisualizerTest MeshVisualizerTest.cpp LIBRARIES MagnumShaders ${GL_TEST_LIBRARIES})
+    corrade_add_test(ShadersPhongTest PhongTest.cpp LIBRARIES MagnumShaders ${GL_TEST_LIBRARIES})
+    corrade_add_test(ShadersVectorTest VectorTest.cpp LIBRARIES MagnumShaders ${GL_TEST_LIBRARIES})
+    corrade_add_test(ShadersVertexColorTest VertexColorTest.cpp LIBRARIES MagnumShaders ${GL_TEST_LIBRARIES})
+endif()

src/Shaders/Test/DistanceFieldVectorTest.cpp

@@ -0,0 +1,55 @@
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include "Shaders/DistanceFieldVector.h"
+#include "Test/AbstractOpenGLTester.h"
+
+namespace Magnum { namespace Shaders { namespace Test {
+
+class DistanceFieldVectorTest: public Magnum::Test::AbstractOpenGLTester {
+    public:
+        explicit DistanceFieldVectorTest();
+
+        void compile2D();
+        void compile3D();
+};
+
+DistanceFieldVectorTest::DistanceFieldVectorTest() {
+    addTests({&DistanceFieldVectorTest::compile2D,
+              &DistanceFieldVectorTest::compile3D});
+}
+
+void DistanceFieldVectorTest::compile2D() {
+    Shaders::DistanceFieldVector2D shader;
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void DistanceFieldVectorTest::compile3D() {
+    Shaders::DistanceFieldVector3D shader;
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+}}}
+
+CORRADE_TEST_MAIN(Magnum::Shaders::Test::DistanceFieldVectorTest)

src/Shaders/Test/FlatTest.cpp

@@ -0,0 +1,55 @@
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include "Shaders/Flat.h"
+#include "Test/AbstractOpenGLTester.h"
+
+namespace Magnum { namespace Shaders { namespace Test {
+
+class FlatTest: public Magnum::Test::AbstractOpenGLTester {
+    public:
+        explicit FlatTest();
+
+        void compile2D();
+        void compile3D();
+};
+
+FlatTest::FlatTest() {
+    addTests({&FlatTest::compile2D,
+              &FlatTest::compile3D});
+}
+
+void FlatTest::compile2D() {
+    Shaders::Flat2D shader;
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void FlatTest::compile3D() {
+    Shaders::Flat3D shader;
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+}}}
+
+CORRADE_TEST_MAIN(Magnum::Shaders::Test::FlatTest)

src/Shaders/Test/MeshVisualizerTest.cpp

@@ -0,0 +1,71 @@
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include "Context.h"
+#include "Extensions.h"
+#include "Shaders/MeshVisualizer.h"
+#include "Test/AbstractOpenGLTester.h"
+
+namespace Magnum { namespace Shaders { namespace Test {
+
+class MeshVisualizerTest: public Magnum::Test::AbstractOpenGLTester {
+    public:
+        explicit MeshVisualizerTest();
+
+        void compile();
+        void compileWireframeGeometryShader();
+        void compileWireframeNoGeometryShader();
+};
+
+MeshVisualizerTest::MeshVisualizerTest() {
+    addTests({&MeshVisualizerTest::compile,
+              &MeshVisualizerTest::compileWireframeGeometryShader,
+              &MeshVisualizerTest::compileWireframeNoGeometryShader});
+}
+
+void MeshVisualizerTest::compile() {
+    Shaders::MeshVisualizer shader;
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void MeshVisualizerTest::compileWireframeGeometryShader() {
+    #ifdef MAGNUM_TARGET_GLES
+    CORRADE_SKIP("Geometry shader is not available in OpenGL ES");
+    #else
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::geometry_shader4>())
+        CORRADE_SKIP(Extensions::GL::ARB::geometry_shader4::string() + std::string(" is not supported"));
+
+    Shaders::MeshVisualizer shader(Shaders::MeshVisualizer::Flag::Wireframe);
+    CORRADE_VERIFY(shader.validate().first);
+    #endif
+}
+
+void MeshVisualizerTest::compileWireframeNoGeometryShader() {
+    Shaders::MeshVisualizer shader(Shaders::MeshVisualizer::Flag::Wireframe|Shaders::MeshVisualizer::Flag::NoGeometryShader);
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+}}}
+
+CORRADE_TEST_MAIN(Magnum::Shaders::Test::MeshVisualizerTest)

src/Shaders/Test/PhongTest.cpp

@@ -0,0 +1,97 @@
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include "Shaders/Phong.h"
+#include "Test/AbstractOpenGLTester.h"
+
+namespace Magnum { namespace Shaders { namespace Test {
+
+class PhongTest: public Magnum::Test::AbstractOpenGLTester {
+    public:
+        explicit PhongTest();
+
+        void compile();
+        void compileAmbientTexture();
+        void compileDiffuseTexture();
+        void compileSpecularTexture();
+        void compileAmbientDiffuseTexture();
+        void compileAmbientSpecularTexture();
+        void compileDiffuseSpecularTexture();
+        void compileAmbientDiffuseSpecularTexture();
+};
+
+PhongTest::PhongTest() {
+    addTests({&PhongTest::compile,
+              &PhongTest::compileAmbientTexture,
+              &PhongTest::compileDiffuseTexture,
+              &PhongTest::compileSpecularTexture,
+              &PhongTest::compileAmbientDiffuseTexture,
+              &PhongTest::compileAmbientSpecularTexture,
+              &PhongTest::compileDiffuseSpecularTexture,
+              &PhongTest::compileAmbientDiffuseSpecularTexture});
+}
+
+void PhongTest::compile() {
+    Shaders::Phong shader;
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void PhongTest::compileAmbientTexture() {
+    Shaders::Phong shader(Shaders::Phong::Flag::AmbientTexture);
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void PhongTest::compileDiffuseTexture() {
+    Shaders::Phong shader(Shaders::Phong::Flag::DiffuseTexture);
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void PhongTest::compileSpecularTexture() {
+    Shaders::Phong shader(Shaders::Phong::Flag::SpecularTexture);
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void PhongTest::compileAmbientDiffuseTexture() {
+    Shaders::Phong shader(Shaders::Phong::Flag::AmbientTexture|Shaders::Phong::Flag::DiffuseTexture);
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void PhongTest::compileAmbientSpecularTexture() {
+    Shaders::Phong shader(Shaders::Phong::Flag::AmbientTexture|Shaders::Phong::Flag::SpecularTexture);
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void PhongTest::compileDiffuseSpecularTexture() {
+    Shaders::Phong shader(Shaders::Phong::Flag::DiffuseTexture|Shaders::Phong::Flag::SpecularTexture);
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void PhongTest::compileAmbientDiffuseSpecularTexture() {
+    Shaders::Phong shader(Shaders::Phong::Flag::AmbientTexture|Shaders::Phong::Flag::DiffuseTexture|Shaders::Phong::Flag::SpecularTexture);
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+}}}
+
+CORRADE_TEST_MAIN(Magnum::Shaders::Test::PhongTest)

src/Shaders/Test/VectorTest.cpp

@@ -0,0 +1,55 @@
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include "Shaders/Vector.h"
+#include "Test/AbstractOpenGLTester.h"
+
+namespace Magnum { namespace Shaders { namespace Test {
+
+class VectorTest: public Magnum::Test::AbstractOpenGLTester {
+    public:
+        explicit VectorTest();
+
+        void compile2D();
+        void compile3D();
+};
+
+VectorTest::VectorTest() {
+    addTests({&VectorTest::compile2D,
+              &VectorTest::compile3D});
+}
+
+void VectorTest::compile2D() {
+    Shaders::Vector2D shader;
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void VectorTest::compile3D() {
+    Shaders::Vector3D shader;
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+}}}
+
+CORRADE_TEST_MAIN(Magnum::Shaders::Test::VectorTest)

src/Shaders/Test/VertexColorTest.cpp

@@ -0,0 +1,55 @@
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include "Shaders/VertexColor.h"
+#include "Test/AbstractOpenGLTester.h"
+
+namespace Magnum { namespace Shaders { namespace Test {
+
+class VertexColorTest: public Magnum::Test::AbstractOpenGLTester {
+    public:
+        explicit VertexColorTest();
+
+        void compile2D();
+        void compile3D();
+};
+
+VertexColorTest::VertexColorTest() {
+    addTests({&VertexColorTest::compile2D,
+              &VertexColorTest::compile3D});
+}
+
+void VertexColorTest::compile2D() {
+    Shaders::VertexColor2D shader;
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+void VertexColorTest::compile3D() {
+    Shaders::VertexColor3D shader;
+    CORRADE_VERIFY(shader.validate().first);
+}
+
+}}}
+
+CORRADE_TEST_MAIN(Magnum::Shaders::Test::VertexColorTest)

src/Shaders/Vector.cpp

@@ -44,27 +44,26 @@ template<UnsignedInt dimensions> Vector<dimensions>::Vector(): transformationPro
     /* Weird bug in GCC 4.5 - cannot use initializer list here, although the
        same thing works in PhongShader flawlessly */
     #ifndef MAGNUM_TARGET_GLES
-    std::initializer_list<Version> vs{Version::GL320, Version::GL210};
+    std::initializer_list<Version> vs{Version::GL310, Version::GL300, Version::GL210};
     #else
     std::initializer_list<Version> vs{Version::GLES300, Version::GLES200};
     #endif
-    Version v = Context::current()->supportedVersion(vs);
+    Version version = Context::current()->supportedVersion(vs);
 
-    Shader vert(v, Shader::Type::Vertex);
+    Shader vert(version, Shader::Type::Vertex);
     vert.addSource(rs.get("compatibility.glsl"))
         .addSource(rs.get(vertexShaderName<dimensions>()));
     CORRADE_INTERNAL_ASSERT_OUTPUT(vert.compile());
     AbstractShaderProgram::attachShader(vert);
 
-    Shader frag(v, Shader::Type::Fragment);
+    Shader frag(version, Shader::Type::Fragment);
     frag.addSource(rs.get("compatibility.glsl"))
         .addSource(rs.get("Vector.frag"));
     CORRADE_INTERNAL_ASSERT_OUTPUT(frag.compile());
     AbstractShaderProgram::attachShader(frag);
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>() ||
-        Context::current()->version() == Version::GL210)
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>(version))
     #else
     if(!Context::current()->isVersionSupported(Version::GLES300))
     #endif
@@ -76,7 +75,7 @@ template<UnsignedInt dimensions> Vector<dimensions>::Vector(): transformationPro
     CORRADE_INTERNAL_ASSERT_OUTPUT(AbstractShaderProgram::link());
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>())
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>(version))
     #endif
     {
         transformationProjectionMatrixUniform = AbstractShaderProgram::uniformLocation("transformationProjectionMatrix");
@@ -84,7 +83,7 @@ template<UnsignedInt dimensions> Vector<dimensions>::Vector(): transformationPro
     }
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shading_language_420pack>())
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::shading_language_420pack>(version))
     #endif
     {
         AbstractShaderProgram::setUniform(AbstractShaderProgram::uniformLocation("vectorTexture"), AbstractVector<dimensions>::VectorTextureLayer);

src/Shaders/VertexColor.cpp

@@ -44,9 +44,9 @@ template<UnsignedInt dimensions> VertexColor<dimensions>::VertexColor(): transfo
        same thing works in PhongShader flawlessly*/
     #ifndef CORRADE_GCC45_COMPATIBILITY
     #ifndef MAGNUM_TARGET_GLES
-    Version v = Context::current()->supportedVersion({Version::GL320, Version::GL210});
+    const Version version = Context::current()->supportedVersion({Version::GL310, Version::GL300, Version::GL210});
     #else
-    Version v = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
+    const Version version = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
     #endif
     #else
     #ifndef MAGNUM_TARGET_GLES
@@ -54,24 +54,23 @@ template<UnsignedInt dimensions> VertexColor<dimensions>::VertexColor(): transfo
     #else
     std::initializer_list<Version> vs{Version::GLES300, Version::GLES200};
     #endif
-    Version v = Context::current()->supportedVersion(vs);
+    Version version = Context::current()->supportedVersion(vs);
     #endif
 
-    Shader vert(v, Shader::Type::Vertex);
+    Shader vert(version, Shader::Type::Vertex);
     vert.addSource(rs.get("compatibility.glsl"))
         .addSource(rs.get(vertexShaderName<dimensions>()));
     CORRADE_INTERNAL_ASSERT_OUTPUT(vert.compile());
     attachShader(vert);
 
-    Shader frag(v, Shader::Type::Fragment);
+    Shader frag(version, Shader::Type::Fragment);
     frag.addSource(rs.get("compatibility.glsl"))
         .addSource(rs.get("VertexColor.frag"));
     CORRADE_INTERNAL_ASSERT_OUTPUT(frag.compile());
     attachShader(frag);
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>() ||
-        Context::current()->version() == Version::GL210)
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_attrib_location>(version))
     #else
     if(!Context::current()->isVersionSupported(Version::GLES300))
     #endif
@@ -83,7 +82,7 @@ template<UnsignedInt dimensions> VertexColor<dimensions>::VertexColor(): transfo
     CORRADE_INTERNAL_ASSERT_OUTPUT(link());
 
     #ifndef MAGNUM_TARGET_GLES
-    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>())
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::explicit_uniform_location>(version))
     #endif
     {
         transformationProjectionMatrixUniform = uniformLocation("transformationProjectionMatrix");

src/Shaders/compatibility.glsl

@@ -23,38 +23,40 @@
 */
 
 #if (!defined(GL_ES) && __VERSION__ >= 130) || (defined(GL_ES) && __VERSION__ >= 300)
-#define NEW_GLSL
+    #define NEW_GLSL
 #endif
 
-/* On NVidia and GLSL 1.20 layout qualifiers result in parsing error, even if
-   the extension is defined as supported */
-#if !defined(GL_ES) && __VERSION__ >= 130
-
-#ifdef GL_ARB_explicit_attrib_location
-    #extension GL_ARB_explicit_attrib_location: enable
-    #define EXPLICIT_ATTRIB_LOCATION
-#endif
-#if defined(GL_ARB_shading_language_420pack)
+#ifdef GL_ARB_shading_language_420pack
     #extension GL_ARB_shading_language_420pack: enable
-    #define EXPLICIT_TEXTURE_LAYER
     #define RUNTIME_CONST
 #endif
-#ifdef GL_ARB_explicit_uniform_location
-    #extension GL_ARB_explicit_uniform_location: enable
-    #define EXPLICIT_UNIFORM_LOCATION
-#endif
 
+/* On NVidia and GLSL 1.20 layout qualifiers result in parsing error, even if
+   the extension is defined as supported */
+#if !defined(GL_ES) && __VERSION__ >= 140
+    #ifdef GL_ARB_explicit_attrib_location
+        #extension GL_ARB_explicit_attrib_location: enable
+        #define EXPLICIT_ATTRIB_LOCATION
+    #endif
+    #ifdef GL_ARB_shading_language_420pack
+        /* Already enabled */
+        #define EXPLICIT_TEXTURE_LAYER
+    #endif
+    #ifdef GL_ARB_explicit_uniform_location
+        #extension GL_ARB_explicit_uniform_location: enable
+        #define EXPLICIT_UNIFORM_LOCATION
+    #endif
 #endif
 
 #if defined(GL_ES) && __VERSION__ >= 300
-#define EXPLICIT_ATTRIB_LOCATION
-/* EXPLICIT_TEXTURE_LAYER, EXPLICIT_UNIFORM_LOCATION and RUNTIME_CONST is not
-   available in OpenGL ES */
+    #define EXPLICIT_ATTRIB_LOCATION
+    /* EXPLICIT_TEXTURE_LAYER, EXPLICIT_UNIFORM_LOCATION and RUNTIME_CONST is not
+       available in OpenGL ES */
 #endif
 
 /* Precision qualifiers are not supported in GLSL 1.20 */
 #if !defined(GL_ES) && __VERSION__ == 120
-#define highp
-#define mediump
-#define lowp
+    #define highp
+    #define mediump
+    #define lowp
 #endif

src/Shapes/CMakeLists.txt

@@ -46,6 +46,7 @@ set(MagnumShapes_HEADERS
     Box.h
     Capsule.h
     Cylinder.h
+    Collision.h
     Composition.h
     Line.h
     LineSegment.h

src/Shapes/Collision.h

@@ -0,0 +1,131 @@
+#ifndef Magnum_Shapes_Collision_h
+#define Magnum_Shapes_Collision_h
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+/** @file
+ * @brief Class @ref Magnum::Shapes::Collision
+ */
+
+#include "Math/Vector2.h"
+#include "Math/Vector3.h"
+#include "DimensionTraits.h"
+
+namespace Magnum { namespace Shapes {
+
+/**
+@brief %Collision data
+
+Contains information about collision between objects A and B, described by
+contact position, separation normal and separation distance.
+
+If the collision occured, contact position is on object B surface, separation
+normal is *normalized* vector in which direction should object A be moved to
+separate the bodies, separation distance is positive and describes minimal
+movement of object A in direction of separation normal after which the contact
+position will no longer be colliding with object A.
+
+If the collision not occured, contact position and separation normal is
+undefined (i.e., *not* normalized) and separation distance is negative or zero.
+@see @ref Collision2D, @ref Collision3D
+*/
+template<UnsignedInt dimensions> class Collision {
+    public:
+        /**
+         * @brief Default constructor
+         *
+         * Sets position, normal and separation distance to zero, as if no
+         * collision happened.
+         */
+        /*implicit*/ Collision(): _separationDistance(0.0f) {}
+
+        /**
+         * @brief Constructor
+         *
+         * If separation distance is positive, the separation normal is
+         * expected to be normalized.
+         */
+        explicit Collision(typename DimensionTraits<dimensions, Float>::VectorType position, typename DimensionTraits<dimensions, Float>::VectorType separationNormal, Float separationDistance) noexcept: _position(position), _separationNormal(separationNormal), _separationDistance(separationDistance) {
+            CORRADE_ASSERT(_separationDistance < Math::TypeTraits<Float>::epsilon() || separationNormal.isNormalized(), "Shapes::Collision::Collision: separation normal is not normalized", );
+        }
+
+        /**
+         * @brief Whether the collision happened
+         *
+         * Negative or zero separation distance means that no collision
+         * happened.
+         * @see @ref separationDistance()
+         */
+        operator bool() const { return _separationDistance > 0.0f; }
+
+        /** @brief %Collision position */
+        typename DimensionTraits<dimensions, Float>::VectorType position() const {
+            return _position;
+        }
+
+        /**
+         * @brief Separation normal
+         *
+         * @see @ref separationDistance(), @ref flipped()
+         */
+        typename DimensionTraits<dimensions, Float>::VectorType separationNormal() const {
+            return _separationNormal;
+        }
+
+        /**
+         * @brief Separation distance
+         *
+         * @see @ref separationNormal(), operator bool()
+         */
+        Float separationDistance() const {
+            return _separationDistance;
+        }
+
+        /**
+         * @brief Flipped collision
+         *
+         * Returns new collision object as if the collision occured between
+         * flipped pair of objects, i.e. with flipped separation normal and
+         * contact position on surface of object A.
+         * @see @ref position(), @ref separationNormal()
+         */
+        Collision<dimensions> flipped() const {
+            return Collision<dimensions>(_position - _separationDistance*_separationNormal, -_separationNormal, _separationDistance);
+        }
+
+    private:
+        typename DimensionTraits<dimensions, Float>::VectorType _position;
+        typename DimensionTraits<dimensions, Float>::VectorType _separationNormal;
+        Float _separationDistance;
+};
+
+/** @brief Two-dimensional collision data */
+typedef Collision<2> Collision2D;
+
+/** @brief Three-dimensional collision data */
+typedef Collision<3> Collision3D;
+
+}}
+
+#endif

src/Shapes/Composition.h

@@ -79,6 +79,7 @@ template<UnsignedInt dimensions> class MAGNUM_SHAPES_EXPORT Composition {
             Line,           /**< Line */
             LineSegment,    /**< @ref LineSegment "Line segment" */
             Sphere,         /**< Sphere */
+            InvertedSphere, /**< @ref InvertedSphere "Inverted sphere" */
             Cylinder,       /**< @ref Cylinder */
             Capsule,        /**< Capsule */
             AxisAlignedBox, /**< @ref AxisAlignedBox "Axis aligned box" */

src/Shapes/Implementation/CollisionDispatch.cpp

@@ -49,6 +49,9 @@ template<> bool collides(const AbstractShape<2>& a, const AbstractShape<2>& b) {
         _c(Sphere, Sphere2D, LineSegment, LineSegment2D)
         _c(Sphere, Sphere2D, Sphere, Sphere2D)
 
+        _c(InvertedSphere, InvertedSphere2D, Point, Point2D)
+        _c(InvertedSphere, InvertedSphere2D, Sphere, Sphere2D)
+
         _c(Cylinder, Cylinder2D, Point, Point2D)
         _c(Cylinder, Cylinder2D, Sphere, Sphere2D)
 
@@ -75,6 +78,9 @@ template<> bool collides(const AbstractShape<3>& a, const AbstractShape<3>& b) {
         _c(Sphere, Sphere3D, LineSegment, LineSegment3D)
         _c(Sphere, Sphere3D, Sphere, Sphere3D)
 
+        _c(InvertedSphere, InvertedSphere3D, Point, Point3D)
+        _c(InvertedSphere, InvertedSphere3D, Sphere, Sphere3D)
+
         _c(Cylinder, Cylinder3D, Point, Point3D)
         _c(Cylinder, Cylinder3D, Sphere, Sphere3D)
 

src/Shapes/Shapes.h

@@ -48,6 +48,10 @@ template<UnsignedInt> class Capsule;
 typedef Capsule<2> Capsule2D;
 typedef Capsule<3> Capsule3D;
 
+template<UnsignedInt> class Collision;
+typedef Collision<2> Collision2D;
+typedef Collision<3> Collision3D;
+
 template<UnsignedInt> class Composition;
 typedef Composition<2> Composition2D;
 typedef Composition<3> Composition3D;
@@ -74,6 +78,10 @@ template<UnsignedInt> class Sphere;
 typedef Sphere<2> Sphere2D;
 typedef Sphere<3> Sphere3D;
 
+template<UnsignedInt> class InvertedSphere;
+typedef InvertedSphere<2> InvertedSphere2D;
+typedef InvertedSphere<3> InvertedSphere3D;
+
 class Plane;
 
 template<UnsignedInt> class Point;

src/Shapes/Sphere.cpp

@@ -41,7 +41,49 @@ template<UnsignedInt dimensions> Sphere<dimensions> Sphere<dimensions>::transfor
 }
 
 template<UnsignedInt dimensions> bool Sphere<dimensions>::operator%(const Point<dimensions>& other) const {
-    return (other.position()-_position).dot() < Math::pow<2>(_radius);
+    return (_position - other.position()).dot() < Math::pow<2>(_radius);
+}
+
+template<UnsignedInt dimensions> bool InvertedSphere<dimensions>::operator%(const Point<dimensions>& other) const {
+    return (other.position() - position()).dot() > Math::pow<2>(radius());
+}
+
+template<UnsignedInt dimensions> Collision<dimensions> Sphere<dimensions>::operator/(const Point<dimensions>& other) const {
+    const typename DimensionTraits<dimensions, Float>::VectorType separating = _position - other.position();
+    const Float dot = separating.dot();
+
+    /* No collision occured */
+    if(dot > Math::pow<2>(_radius)) return {};
+
+    /* Actual distance from the center */
+    const Float distance = Math::sqrt(dot);
+
+    /* Separating normal. If can't decide on direction, just move up. */
+    /** @todo How to handle this in a configurable way? */
+    const typename DimensionTraits<dimensions, Float>::VectorType separatingNormal =
+        Math::TypeTraits<Float>::equals(dot, 0.0f) ?
+        DimensionTraits<dimensions, Float>::VectorType::yAxis() :
+        separating/distance;
+
+    /* Collision position is on the point */
+    return Collision<dimensions>(other.position(), separatingNormal, _radius - distance);
+}
+
+template<UnsignedInt dimensions> Collision<dimensions> InvertedSphere<dimensions>::operator/(const Point<dimensions>& other) const {
+    const typename DimensionTraits<dimensions, Float>::VectorType separating = other.position() - position();
+    const Float dot = separating.dot();
+
+    /* No collision occured */
+    if(dot < Math::pow<2>(radius())) return {};
+
+    /* Actual distance from the center */
+    const Float distance = Math::sqrt(dot);
+
+    /* Separating normal */
+    const typename DimensionTraits<dimensions, Float>::VectorType separatingNormal = separating/distance;
+
+    /* Collision position is on the point */
+    return Collision<dimensions>(other.position(), separatingNormal, distance - radius());
 }
 
 template<UnsignedInt dimensions> bool Sphere<dimensions>::operator%(const Line<dimensions>& other) const {
@@ -53,12 +95,60 @@ template<UnsignedInt dimensions> bool Sphere<dimensions>::operator%(const LineSe
 }
 
 template<UnsignedInt dimensions> bool Sphere<dimensions>::operator%(const Sphere<dimensions>& other) const {
-    return (other._position-_position).dot() < Math::pow<2>(_radius+other._radius);
+    return (_position - other._position).dot() < Math::pow<2>(_radius + other._radius);
+}
+
+template<UnsignedInt dimensions> bool InvertedSphere<dimensions>::operator%(const Sphere<dimensions>& other) const {
+    return (position() - other.position()).dot() > Math::pow<2>(radius() - other.radius());
+}
+
+template<UnsignedInt dimensions> Collision<dimensions> Sphere<dimensions>::operator/(const Sphere<dimensions>& other) const {
+    const Float minDistance = _radius + other._radius;
+    const typename DimensionTraits<dimensions, Float>::VectorType separating = _position - other._position;
+    const Float dot = separating.dot();
+
+    /* No collision occured */
+    if(dot > Math::pow<2>(minDistance)) return {};
+
+    /* Actual distance */
+    const Float distance = Math::sqrt(dot);
+
+    /* Separating normal. If can't decide on direction, just move up. */
+    /** @todo How to handle this in a configurable way? */
+    const typename DimensionTraits<dimensions, Float>::VectorType separatingNormal =
+        Math::TypeTraits<Float>::equals(dot, 0.0f) ?
+        DimensionTraits<dimensions, Float>::VectorType::yAxis() :
+        separating/distance;
+
+    /* Contact position is on the surface of `other`, minDistace > distance */
+    return Collision<dimensions>(other._position + separatingNormal*other._radius, separatingNormal, minDistance - distance);
+}
+
+template<UnsignedInt dimensions> Collision<dimensions> InvertedSphere<dimensions>::operator/(const Sphere<dimensions>& other) const {
+    const Float maxDistance = radius() - other.radius();
+    /** @todo How to handle inseparable shapes or shapes which can't be separated by movement only (i.e. two half-spaces)? */
+    CORRADE_INTERNAL_ASSERT(maxDistance > 0.0f);
+    const typename DimensionTraits<dimensions, Float>::VectorType separating = other.position() - position();
+    const Float dot = separating.dot();
+
+    /* No collision occured */
+    if(dot < Math::pow<2>(maxDistance)) return {};
+
+    /* Actual distance */
+    const Float distance = Math::sqrt(dot);
+
+    /* Separating normal */
+    const typename DimensionTraits<dimensions, Float>::VectorType separatingNormal = separating/distance;
+
+    /* Contact position is on the surface of `other`, distance > maxDistance */
+    return Collision<dimensions>(other.position() + separatingNormal*other.radius(), separatingNormal, distance - maxDistance);
 }
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
 template class MAGNUM_SHAPES_EXPORT Sphere<2>;
 template class MAGNUM_SHAPES_EXPORT Sphere<3>;
+template class MAGNUM_SHAPES_EXPORT InvertedSphere<2>;
+template class MAGNUM_SHAPES_EXPORT InvertedSphere<3>;
 #endif
 
 }}

src/Shapes/Sphere.h

@@ -30,6 +30,7 @@
 
 #include "Math/Vector3.h"
 #include "DimensionTraits.h"
+#include "Shapes/Collision.h"
 #include "Shapes/Shapes.h"
 #include "Shapes/magnumShapesVisibility.h"
 
@@ -82,6 +83,9 @@ template<UnsignedInt dimensions> class MAGNUM_SHAPES_EXPORT Sphere {
         /** @brief %Collision occurence with point */
         bool operator%(const Point<dimensions>& other) const;
 
+        /** @brief %Collision with point */
+        Collision<dimensions> operator/(const Point<dimensions>& other) const;
+
         /** @brief %Collision occurence with line */
         bool operator%(const Line<dimensions>& other) const;
 
@@ -91,6 +95,9 @@ template<UnsignedInt dimensions> class MAGNUM_SHAPES_EXPORT Sphere {
         /** @brief %Collision occurence with sphere */
         bool operator%(const Sphere<dimensions>& other) const;
 
+        /** @brief %Collision with sphere */
+        Collision<dimensions> operator/(const Sphere<dimensions>& other) const;
+
     private:
         typename DimensionTraits<dimensions, Float>::VectorType _position;
         Float _radius;
@@ -102,15 +109,89 @@ typedef Sphere<2> Sphere2D;
 /** @brief Three-dimensional sphere */
 typedef Sphere<3> Sphere3D;
 
+/**
+@brief Inverted sphere defined by position and radius
+
+Inverted version of @ref Sphere, detecting collisions on the outside, not on
+the inside. See @ref shapes for brief introduction.
+@see @ref InvertedSphere2D, @ref InvertedSphere3D
+*/
+template<UnsignedInt dimensions> class MAGNUM_SHAPES_EXPORT InvertedSphere:
+    #ifdef DOXYGEN_GENERATING_OUTPUT
+    public Sphere<dimensions>
+    #else
+    private Sphere<dimensions>
+    #endif
+{
+    public:
+        /**
+         * @brief Default constructor
+         *
+         * Creates zero-sized sphere at origin.
+         */
+        constexpr /*implicit*/ InvertedSphere() = default;
+
+        /** @brief Constructor */
+        constexpr /*implicit*/ InvertedSphere(const typename DimensionTraits<dimensions, Float>::VectorType& position, Float radius): Sphere<dimensions>(position, radius) {}
+
+        using Sphere<dimensions>::Dimensions;
+
+        /** @brief Transformed shape */
+        InvertedSphere<dimensions> transformed(const typename DimensionTraits<dimensions, Float>::MatrixType& matrix) const {
+            return Sphere<dimensions>::transformed(matrix);
+        }
+
+        using Sphere<dimensions>::position;
+        using Sphere<dimensions>::setPosition;
+        using Sphere<dimensions>::radius;
+        using Sphere<dimensions>::setRadius;
+
+        /** @brief %Collision occurence with point */
+        bool operator%(const Point<dimensions>& other) const;
+
+        /** @brief %Collision with point */
+        Collision<dimensions> operator/(const Point<dimensions>& other) const;
+
+        /** @brief %Collision occurence with sphere */
+        bool operator%(const Sphere<dimensions>& other) const;
+
+        /** @brief %Collision with sphere */
+        Collision<dimensions> operator/(const Sphere<dimensions>& other) const;
+
+    private:
+        constexpr /*implicit*/ InvertedSphere(const Sphere<dimensions>& other): Sphere<dimensions>(other) {}
+};
+
+/** @brief Inverted two-dimensional sphere */
+typedef InvertedSphere<2> InvertedSphere2D;
+
+/** @brief Inverted three-dimensional sphere */
+typedef InvertedSphere<3> InvertedSphere3D;
+
 /** @collisionoccurenceoperator{Point,Sphere} */
 template<UnsignedInt dimensions> inline bool operator%(const Point<dimensions>& a, const Sphere<dimensions>& b) { return b % a; }
 
+/** @collisionoccurenceoperator{Point,InvertedSphere} */
+template<UnsignedInt dimensions> inline bool operator%(const Point<dimensions>& a, const InvertedSphere<dimensions>& b) { return b % a; }
+
+/** @collisionoperator{Point,Sphere} */
+template<UnsignedInt dimensions> inline Collision<dimensions> operator/(const Point<dimensions>& a, const Sphere<dimensions>& b) { return (b/a).flipped(); }
+
+/** @collisionoperator{Point,InvertedSphere} */
+template<UnsignedInt dimensions> inline Collision<dimensions> operator/(const Point<dimensions>& a, const InvertedSphere<dimensions>& b) { return (b/a).flipped(); }
+
 /** @collisionoccurenceoperator{Line,Sphere} */
 template<UnsignedInt dimensions> inline bool operator%(const Line<dimensions>& a, const Sphere<dimensions>& b) { return b % a; }
 
 /** @collisionoccurenceoperator{LineSegment,Sphere} */
 template<UnsignedInt dimensions> inline bool operator%(const LineSegment<dimensions>& a, const Sphere<dimensions>& b) { return b % a; }
 
+/** @collisionoccurenceoperator{Sphere,InvertedSphere} */
+template<UnsignedInt dimensions> inline bool operator%(const Sphere<dimensions>& a, const InvertedSphere<dimensions>& b) { return b % a; }
+
+/** @collisionoperator{Sphere,InvertedSphere} */
+template<UnsignedInt dimensions> inline Collision<dimensions> operator/(const Sphere<dimensions>& a, const InvertedSphere<dimensions>& b) { return (b/a).flipped(); }
+
 }}
 
 #endif

src/Shapes/Test/CMakeLists.txt

@@ -26,6 +26,7 @@ corrade_add_test(ShapesShapeImplementationTest ShapeImplementationTest.cpp LIBRA
 corrade_add_test(ShapesAxisAlignedBoxTest AxisAlignedBoxTest.cpp LIBRARIES MagnumShapes)
 corrade_add_test(ShapesBoxTest BoxTest.cpp LIBRARIES MagnumShapes)
 corrade_add_test(ShapesCapsuleTest CapsuleTest.cpp LIBRARIES MagnumShapes)
+corrade_add_test(ShapesCollisionTest CollisionTest.cpp LIBRARIES MagnumShapes)
 corrade_add_test(ShapesCylinderTest CylinderTest.cpp LIBRARIES MagnumShapes)
 corrade_add_test(ShapesLineTest LineTest.cpp LIBRARIES MagnumShapes)
 corrade_add_test(ShapesPlaneTest PlaneTest.cpp LIBRARIES MagnumShapes)

src/Shapes/Test/CollisionTest.cpp

@@ -0,0 +1,61 @@
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include <TestSuite/Tester.h>
+
+#include "Shapes/Collision.h"
+#include "Magnum.h"
+
+namespace Magnum { namespace Shapes { namespace Test {
+
+class CollisionTest: public TestSuite::Tester {
+    public:
+        explicit CollisionTest();
+
+        void boolConversion();
+        void flipped();
+};
+
+CollisionTest::CollisionTest() {
+    addTests({&CollisionTest::boolConversion,
+              &CollisionTest::flipped});
+}
+
+void CollisionTest::boolConversion() {
+    CORRADE_VERIFY(!Collision3D());
+    CORRADE_VERIFY(!Collision3D({}, {2.0f, 0.0f, 0.0f}, 0.0f));
+    CORRADE_VERIFY(!Collision3D({}, {0.0f, 0.0f, 2.0f}, -0.1f));
+    CORRADE_VERIFY(Collision3D({}, {0.0f, 1.0f, 0.0f}, 0.1f));
+}
+
+void CollisionTest::flipped() {
+    const auto flipped = Collision3D({-1.0f, 0.5f, 3.0f}, {1.0f, 0.0f, 0.0f}, 0.5f).flipped();
+    CORRADE_COMPARE(flipped.position(), Vector3(-1.5f, 0.5f, 3.0f));
+    CORRADE_COMPARE(flipped.separationNormal(), Vector3(-1.0f, 0.0f, 0.0f));
+    CORRADE_COMPARE(flipped.separationDistance(), 0.5f);
+}
+
+}}}
+
+CORRADE_TEST_MAIN(Magnum::Shapes::Test::CollisionTest)

src/Shapes/Test/SphereTest.cpp

@@ -39,17 +39,21 @@ class SphereTest: public TestSuite::Tester {
 
         void transformed();
         void collisionPoint();
+        void collisionPointInverted();
         void collisionLine();
         void collisionLineSegment();
         void collisionSphere();
+        void collisionSphereInverted();
 };
 
 SphereTest::SphereTest() {
     addTests({&SphereTest::transformed,
               &SphereTest::collisionPoint,
+              &SphereTest::collisionPointInverted,
               &SphereTest::collisionLine,
               &SphereTest::collisionLineSegment,
-              &SphereTest::collisionSphere});
+              &SphereTest::collisionSphere,
+              &SphereTest::collisionSphereInverted});
 }
 
 void SphereTest::transformed() {
@@ -61,12 +65,48 @@ void SphereTest::transformed() {
 }
 
 void SphereTest::collisionPoint() {
-    Shapes::Sphere3D sphere({1.0f, 2.0f, 3.0f}, 2.0f);
-    Shapes::Point3D point({1.0f, 3.0f, 3.0f});
-    Shapes::Point3D point2({1.0f, 3.0f, 1.0f});
+    const Shapes::Sphere3D sphere({1.0f, 2.0f, 3.0f}, 2.0f);
+
+    /* Collision */
+    const Shapes::Point3D point({2.5f, 2.0f, 3.0f});
+    const Shapes::Collision3D collision = sphere/point;
+    CORRADE_VERIFY(sphere%point && point%sphere);
+    CORRADE_COMPARE(collision.position(), point.position());
+    CORRADE_COMPARE(collision.separationNormal(), -Vector3::xAxis());
+    CORRADE_COMPARE(collision.separationDistance(), 0.5f);
+
+    /* Collision, flipped */
+    CORRADE_COMPARE(collision.separationNormal(), -(point/sphere).separationNormal());
+
+    /* Collision with ambiguous separation vector */
+    const Shapes::Point3D point2(sphere.position());
+    const Shapes::Collision3D collision2 = sphere/point2;
+    CORRADE_COMPARE(collision2.position(), point2.position());
+    CORRADE_COMPARE(collision2.separationNormal(), Vector3::yAxis());
+    CORRADE_COMPARE(collision2.separationDistance(), 2.0f);
+
+    /* No collision */
+    const Shapes::Point3D point3({-1.5f, 2.0f, 3.0f});
+    CORRADE_VERIFY(!(sphere%point3) && !(sphere/point3));
+}
+
+void SphereTest::collisionPointInverted() {
+    const Shapes::InvertedSphere3D sphere({1.0f, 2.0f, 3.0f}, 2.0f);
+
+    /* Collision */
+    const Shapes::Point3D point({-1.5f, 2.0f, 3.0f});
+    const Shapes::Collision3D collision = sphere/point;
+    CORRADE_VERIFY(sphere%point && point%sphere);
+    CORRADE_COMPARE(collision.position(), point.position());
+    CORRADE_COMPARE(collision.separationNormal(), -Vector3::xAxis());
+    CORRADE_COMPARE(collision.separationDistance(), 0.5f);
+
+    /* Collision, flipped */
+    CORRADE_COMPARE(collision.separationNormal(), -(point/sphere).separationNormal());
 
-    VERIFY_COLLIDES(sphere, point);
-    VERIFY_NOT_COLLIDES(sphere, point2);
+    /* No collision */
+    const Shapes::Point3D point3({2.0f, 2.0f, 3.0f});
+    CORRADE_VERIFY(!(sphere%point3) && !(sphere/point3));
 }
 
 void SphereTest::collisionLine() {
@@ -88,12 +128,48 @@ void SphereTest::collisionLineSegment() {
 }
 
 void SphereTest::collisionSphere() {
-    Shapes::Sphere3D sphere({1.0f, 2.0f, 3.0f}, 2.0f);
-    Shapes::Sphere3D sphere1({1.0f, 3.0f, 5.0f}, 1.0f);
-    Shapes::Sphere3D sphere2({1.0f, 3.0f, 0.0f}, 1.0f);
+    const Shapes::Sphere3D sphere({1.0f, 2.0f, 3.0f}, 2.0f);
+
+    /* Collision */
+    const Shapes::Sphere3D sphere1({3.5f, 2.0f, 3.0f}, 1.0f);
+    const Shapes::Collision3D collision = sphere/sphere1;
+    CORRADE_VERIFY(sphere%sphere1 && sphere1%sphere);
+    CORRADE_COMPARE(collision.position(), sphere1.position() - Vector3::xAxis(sphere1.radius()));
+    CORRADE_COMPARE(collision.separationNormal(), -Vector3::xAxis());
+    CORRADE_COMPARE(collision.separationDistance(), 0.5f);
+
+    /* Collision, flipped */
+    CORRADE_COMPARE(collision.separationNormal(), -(sphere1/sphere).separationNormal());
+
+    /* Collision with ambiguous separation vector */
+    const Shapes::Sphere3D sphere2(sphere.position(), 0.5f);
+    const Shapes::Collision3D collision2 = sphere/sphere2;
+    CORRADE_COMPARE(collision2.position(), sphere2.position() + Vector3::yAxis(sphere2.radius()));
+    CORRADE_COMPARE(collision2.separationNormal(), Vector3::yAxis());
+    CORRADE_COMPARE(collision2.separationDistance(), 2.5f);
+
+    /* No collision */
+    const Shapes::Sphere3D sphere3({-2.5f, 2.0f, 3.0f}, 1.0f);
+    CORRADE_VERIFY(!(sphere%sphere3) && !(sphere/sphere3));
+}
+
+void SphereTest::collisionSphereInverted() {
+    const Shapes::InvertedSphere3D sphere({1.0f, 2.0f, 3.0f}, 2.0f);
+
+    /* Collision */
+    const Shapes::Sphere3D sphere1({-0.5f, 2.0f, 3.0f}, 1.0f);
+    const Shapes::Collision3D collision = sphere/sphere1;
+    CORRADE_VERIFY(sphere%sphere1 && sphere1%sphere);
+    CORRADE_COMPARE(collision.position(), sphere1.position() - Vector3::xAxis(sphere1.radius()));
+    CORRADE_COMPARE(collision.separationNormal(), -Vector3::xAxis());
+    CORRADE_COMPARE(collision.separationDistance(), 0.5f);
+
+    /* Collision, flipped */
+    CORRADE_COMPARE(collision.separationNormal(), -(sphere1/sphere).separationNormal());
 
-    VERIFY_COLLIDES(sphere, sphere1);
-    VERIFY_NOT_COLLIDES(sphere, sphere2);
+    /* No collision */
+    const Shapes::Sphere3D sphere3({1.5f, 2.0f, 3.0f}, 1.0f);
+    CORRADE_VERIFY(!(sphere%sphere3) && !(sphere/sphere3));
 }
 
 }}}

src/Shapes/shapeImplementation.cpp

@@ -35,6 +35,7 @@ Debug operator<<(Debug debug, ShapeDimensionTraits<2>::Type value) {
         _val(Line)
         _val(LineSegment)
         _val(Sphere)
+        _val(InvertedSphere)
         _val(Capsule)
         _val(Cylinder)
         _val(AxisAlignedBox)
@@ -53,6 +54,7 @@ Debug operator<<(Debug debug, ShapeDimensionTraits<3>::Type value) {
         _val(Line)
         _val(LineSegment)
         _val(Sphere)
+        _val(InvertedSphere)
         _val(Capsule)
         _val(Cylinder)
         _val(AxisAlignedBox)

src/Shapes/shapeImplementation.h

@@ -62,11 +62,12 @@ template<> struct ShapeDimensionTraits<2> {
         Line = 2,
         LineSegment = 3,
         Sphere = 5,
-        Cylinder = 7,
-        Capsule = 11,
-        AxisAlignedBox = 13,
-        Box = 17,
-        Composition = 19
+        InvertedSphere = 7,
+        Cylinder = 11,
+        Capsule = 13,
+        AxisAlignedBox = 17,
+        Box = 19,
+        Composition = 23
     };
 };
 
@@ -76,12 +77,13 @@ template<> struct ShapeDimensionTraits<3> {
         Line = 2,
         LineSegment = 3,
         Sphere = 5,
-        Cylinder = 7,
-        Capsule = 11,
-        AxisAlignedBox = 13,
-        Box = 17,
-        Plane = 19,
-        Composition = 23
+        InvertedSphere = 7,
+        Cylinder = 11,
+        Capsule = 13,
+        AxisAlignedBox = 17,
+        Box = 19,
+        Plane = 23,
+        Composition = 29
     };
 };
 
@@ -112,6 +114,11 @@ template<UnsignedInt dimensions> struct TypeOf<Shapes::Sphere<dimensions>> {
         return ShapeDimensionTraits<dimensions>::Type::Sphere;
     }
 };
+template<UnsignedInt dimensions> struct TypeOf<Shapes::InvertedSphere<dimensions>> {
+    constexpr static typename ShapeDimensionTraits<dimensions>::Type type() {
+        return ShapeDimensionTraits<dimensions>::Type::InvertedSphere;
+    }
+};
 template<UnsignedInt dimensions> struct TypeOf<Shapes::Cylinder<dimensions>> {
     constexpr static typename ShapeDimensionTraits<dimensions>::Type type() {
         return ShapeDimensionTraits<dimensions>::Type::Cylinder;

src/Test/AbstractImageTest.cpp

@@ -26,7 +26,7 @@
 #include <TestSuite/Tester.h>
 
 #include "AbstractImage.h"
-#include "ImageFormat.h"
+#include "ColorFormat.h"
 
 namespace Magnum { namespace Test {
 
@@ -45,14 +45,14 @@ AbstractImageTest::AbstractImageTest() {
 
 void AbstractImageTest::debugFormat() {
     std::ostringstream o;
-    Debug(&o) << ImageFormat::RGBA;
-    CORRADE_COMPARE(o.str(), "ImageFormat::RGBA\n");
+    Debug(&o) << ColorFormat::RGBA;
+    CORRADE_COMPARE(o.str(), "ColorFormat::RGBA\n");
 }
 
 void AbstractImageTest::debugType() {
     std::ostringstream o;
-    Debug(&o) << ImageType::UnsignedShort5551;
-    CORRADE_COMPARE(o.str(), "ImageType::UnsignedShort5551\n");
+    Debug(&o) << ColorType::UnsignedShort5551;
+    CORRADE_COMPARE(o.str(), "ColorType::UnsignedShort5551\n");
 }
 
 }}

src/Test/CMakeLists.txt

@@ -37,6 +37,7 @@ corrade_add_test(SwizzleTest SwizzleTest.cpp LIBRARIES MagnumMathTestLib)
 
 if(BUILD_GL_TESTS)
     corrade_add_test(BufferGLTest BufferGLTest.cpp LIBRARIES ${GL_TEST_LIBRARIES})
+    corrade_add_test(ContextTest ContextTest.cpp LIBRARIES ${GL_TEST_LIBRARIES})
 endif()
 
 set_target_properties(ResourceManagerTest PROPERTIES COMPILE_FLAGS -DCORRADE_GRACEFUL_ASSERT)

src/Test/ContextTest.cpp

@@ -0,0 +1,134 @@
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include "Test/AbstractOpenGLTester.h"
+#include "Context.h"
+#include <Extensions.h>
+
+namespace Magnum { namespace Test {
+
+class ContextTest: public AbstractOpenGLTester {
+    public:
+        explicit ContextTest();
+
+        void version();
+        void versionList();
+        void supportedExtension();
+        void unsupportedExtension();
+        void pastExtension();
+        void versionDependentExtension();
+};
+
+ContextTest::ContextTest() {
+    addTests({&ContextTest::version,
+              &ContextTest::versionList,
+              &ContextTest::supportedExtension,
+              &ContextTest::unsupportedExtension,
+              &ContextTest::pastExtension,
+              &ContextTest::versionDependentExtension});
+}
+
+void ContextTest::version() {
+    const Version v = Context::current()->version();
+    CORRADE_VERIFY(Context::current()->isVersionSupported(v));
+    CORRADE_VERIFY(Context::current()->isVersionSupported(Version(Int(v)-1)));
+    CORRADE_VERIFY(!Context::current()->isVersionSupported(Version(Int(v)+1)));
+
+    /* No assertions should be fired */
+    MAGNUM_ASSERT_VERSION_SUPPORTED(v);
+    MAGNUM_ASSERT_VERSION_SUPPORTED(Version(Int(v)-1));
+}
+
+void ContextTest::versionList() {
+    const Version v = Context::current()->version();
+
+    /* Selects first supported version (thus not necessarily the highest) */
+    CORRADE_VERIFY(Context::current()->supportedVersion({Version(Int(v)+1), v, Version(Int(v)-1)}) == v);
+    CORRADE_VERIFY(Context::current()->supportedVersion({Version(Int(v)+1), Version(Int(v)-1), v}) == Version(Int(v)-1));
+}
+
+void ContextTest::supportedExtension() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_filter_anisotropic>())
+        CORRADE_SKIP(Extensions::GL::EXT::texture_filter_anisotropic::string() + std::string(" extension should be supported, can't test"));
+
+    std::string extensions(reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS)));
+    CORRADE_VERIFY(extensions.find(Extensions::GL::EXT::texture_filter_anisotropic::string()) != std::string::npos);
+}
+
+void ContextTest::unsupportedExtension() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(Context::current()->isExtensionSupported<Extensions::GL::GREMEDY::string_marker>())
+        CORRADE_SKIP(Extensions::GL::GREMEDY::string_marker::string() + std::string(" extension shouldn't be supported, can't test"));
+
+    std::string extensions(reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS)));
+    CORRADE_VERIFY(extensions.find(Extensions::GL::GREMEDY::string_marker::string()) == std::string::npos);
+    #elif !defined(CORRADE_TARGET_NACL)
+    if(Context::current()->isExtensionSupported<Extensions::GL::CHROMIUM::map_sub>())
+        CORRADE_SKIP(Extensions::GL::CHROMIUM::map_sub::string() + std::string(" extension shouldn't be supported, can't test"));
+
+    std::string extensions(reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS)));
+    CORRADE_VERIFY(extensions.find(Extensions::GL::CHROMIUM::map_sub::string()) == std::string::npos);
+    #else
+    if(Context::current()->isExtensionSupported<Extensions::GL::NV::read_buffer_front>())
+        CORRADE_SKIP(Extensions::GL::NV::read_buffer_front::string() + std::string(" extension shouldn't be supported, can't test"));
+
+    std::string extensions(reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS)));
+    CORRADE_VERIFY(extensions.find(Extensions::GL::NV::read_buffer_front::string()) == std::string::npos);
+    #endif
+}
+
+void ContextTest::pastExtension() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current()->isVersionSupported(Version::GL300))
+        CORRADE_SKIP("No already supported extensions exist in OpenGL 2.1");
+
+    CORRADE_VERIFY(Context::current()->isExtensionSupported<Extensions::GL::APPLE::vertex_array_object>());
+    /* No assertion should be fired */
+    MAGNUM_ASSERT_EXTENSION_SUPPORTED(Extensions::GL::APPLE::vertex_array_object);
+    #else
+    if(!Context::current()->isVersionSupported(Version::GLES300))
+        CORRADE_SKIP("No already supported extensions exist in OpenGL ES 2.0");
+
+    CORRADE_VERIFY(Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_rg>());
+    /* No assertion should be fired */
+    MAGNUM_ASSERT_EXTENSION_SUPPORTED(Extensions::GL::EXT::texture_rg);
+    #endif
+}
+
+void ContextTest::versionDependentExtension() {
+    #ifndef MAGNUM_TARGET_GLES
+    CORRADE_COMPARE(Extensions::GL::ARB::get_program_binary::requiredVersion(), Version::GL300);
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_program_binary>())
+        CORRADE_SKIP(Extensions::GL::ARB::get_program_binary::string() + std::string("extension isn't supported, can't test"));
+
+    CORRADE_VERIFY(Context::current()->isExtensionSupported<Extensions::GL::ARB::get_program_binary>(Context::current()->version()));
+    CORRADE_VERIFY(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_program_binary>(Version::GL210));
+    #else
+    CORRADE_SKIP("No OpenGL ES 3.0-only extensions exist yet");
+    #endif
+}
+
+}}
+
+CORRADE_TEST_MAIN(Magnum::Test::ContextTest)

src/Test/ImageTest.cpp

@@ -24,8 +24,8 @@
 
 #include <TestSuite/Tester.h>
 
+#include "ColorFormat.h"
 #include "Image.h"
-#include "ImageFormat.h"
 
 namespace Magnum { namespace Test {
 
@@ -46,36 +46,36 @@ ImageTest::ImageTest() {
 
 void ImageTest::moveConstructor() {
     unsigned char* data = new unsigned char[3];
-    Image2D a(ImageFormat::Red, ImageType::UnsignedByte, {1, 3}, data);
+    Image2D a(ColorFormat::Red, ColorType::UnsignedByte, {1, 3}, data);
 
     Image2D b(std::move(a));
     CORRADE_VERIFY(!a.data());
-    CORRADE_COMPARE(b.format(), ImageFormat::Red);
-    CORRADE_COMPARE(b.type(), ImageType::UnsignedByte);
+    CORRADE_COMPARE(b.format(), ColorFormat::Red);
+    CORRADE_COMPARE(b.type(), ColorType::UnsignedByte);
     CORRADE_COMPARE(b.size(), Vector2i(1, 3));
     CORRADE_VERIFY(b.data() == data);
 }
 
 void ImageTest::moveAssignment() {
     unsigned char* data = new unsigned char[3];
-    Image2D a(ImageFormat::Red, ImageType::UnsignedByte, {1, 3}, data);
+    Image2D a(ColorFormat::Red, ColorType::UnsignedByte, {1, 3}, data);
 
-    Image2D b(ImageFormat::Red, ImageType::UnsignedByte);
+    Image2D b(ColorFormat::Red, ColorType::UnsignedByte);
     b = std::move(a);
     CORRADE_VERIFY(!a.data());
-    CORRADE_COMPARE(b.format(), ImageFormat::Red);
-    CORRADE_COMPARE(b.type(), ImageType::UnsignedByte);
+    CORRADE_COMPARE(b.format(), ColorFormat::Red);
+    CORRADE_COMPARE(b.type(), ColorType::UnsignedByte);
     CORRADE_COMPARE(b.size(), Vector2i(1, 3));
     CORRADE_VERIFY(b.data() == data);
 }
 
 void ImageTest::toReference() {
     unsigned char* data = new unsigned char[3];
-    Image2D a(ImageFormat::Red, ImageType::UnsignedByte, {1, 3}, data);
+    Image2D a(ColorFormat::Red, ColorType::UnsignedByte, {1, 3}, data);
 
     ImageReference2D b = a;
-    CORRADE_COMPARE(b.format(), ImageFormat::Red);
-    CORRADE_COMPARE(b.type(), ImageType::UnsignedByte);
+    CORRADE_COMPARE(b.format(), ColorFormat::Red);
+    CORRADE_COMPARE(b.type(), ColorType::UnsignedByte);
     CORRADE_COMPARE(b.size(), Vector2i(1, 3));
     CORRADE_VERIFY(b.data() == data);
 }

src/Text/DistanceFieldGlyphCache.cpp

@@ -24,10 +24,10 @@
 
 #include "DistanceFieldGlyphCache.h"
 
-#include "Extensions.h"
 #ifndef CORRADE_NO_ASSERT
-#include "ImageFormat.h"
+#include "ColorFormat.h"
 #endif
+#include "Extensions.h"
 #include "ImageReference.h"
 #include "TextureFormat.h"
 #include "TextureTools/DistanceField.h"
@@ -58,18 +58,18 @@ DistanceFieldGlyphCache::DistanceFieldGlyphCache(const Vector2i& originalSize, c
 void DistanceFieldGlyphCache::setImage(const Vector2i& offset, const ImageReference2D& image) {
     #if !defined(MAGNUM_TARGET_GLES) || defined(MAGNUM_TARGET_GLES3)
     const TextureFormat internalFormat = TextureFormat::R8;
-    CORRADE_ASSERT(image.format() == ImageFormat::Red,
-        "Text::DistanceFieldGlyphCache::setImage(): expected" << ImageFormat::Red << "but got" << image.format(), );
+    CORRADE_ASSERT(image.format() == ColorFormat::Red,
+        "Text::DistanceFieldGlyphCache::setImage(): expected" << ColorFormat::Red << "but got" << image.format(), );
     #else
     TextureFormat internalFormat;
     if(Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_rg>()) {
         internalFormat = TextureFormat::Red;
-        CORRADE_ASSERT(image.format() == ImageFormat::Red,
-            "Text::DistanceFieldGlyphCache::setImage(): expected" << ImageFormat::Red << "but got" << image.format(), );
+        CORRADE_ASSERT(image.format() == ColorFormat::Red,
+            "Text::DistanceFieldGlyphCache::setImage(): expected" << ColorFormat::Red << "but got" << image.format(), );
     } else {
         internalFormat = TextureFormat::Luminance;
-        CORRADE_ASSERT(image.format() == ImageFormat::Luminance,
-            "Text::DistanceFieldGlyphCache::setImage(): expected" << ImageFormat::Luminance << "but got" << image.format(), );
+        CORRADE_ASSERT(image.format() == ColorFormat::Luminance,
+            "Text::DistanceFieldGlyphCache::setImage(): expected" << ColorFormat::Luminance << "but got" << image.format(), );
     }
     #endif
 
@@ -85,16 +85,16 @@ void DistanceFieldGlyphCache::setImage(const Vector2i& offset, const ImageRefere
 
 void DistanceFieldGlyphCache::setDistanceFieldImage(const Vector2i& offset, const ImageReference2D& image) {
     #if !defined(MAGNUM_TARGET_GLES) || defined(MAGNUM_TARGET_GLES3)
-    CORRADE_ASSERT(image.format() == ImageFormat::Red,
-        "Text::DistanceFieldGlyphCache::setDistanceFieldImage(): expected" << ImageFormat::Red << "but got" << image.format(), );
+    CORRADE_ASSERT(image.format() == ColorFormat::Red,
+        "Text::DistanceFieldGlyphCache::setDistanceFieldImage(): expected" << ColorFormat::Red << "but got" << image.format(), );
     #else
     if(Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_rg>())
-        CORRADE_ASSERT(image.format() == ImageFormat::Red,
-            "Text::DistanceFieldGlyphCache::setDistanceFieldImage(): expected" << ImageFormat::Red << "but got" << image.format(), );
+        CORRADE_ASSERT(image.format() == ColorFormat::Red,
+            "Text::DistanceFieldGlyphCache::setDistanceFieldImage(): expected" << ColorFormat::Red << "but got" << image.format(), );
 
     /* Luminance is not renderable in most cases */
-    else CORRADE_ASSERT(image.format() == ImageFormat::RGB,
-            "Text::DistanceFieldGlyphCache::setDistanceFieldImage(): expected" << ImageFormat::RGB << "but got" << image.format(), );
+    else CORRADE_ASSERT(image.format() == ColorFormat::RGB,
+            "Text::DistanceFieldGlyphCache::setDistanceFieldImage(): expected" << ColorFormat::RGB << "but got" << image.format(), );
     #endif
 
     texture().setSubImage(0, offset, image);

src/Texture.h

@@ -46,13 +46,13 @@ data from e.g. Image. Example configuration of high quality texture with
 trilinear anisotropic filtering, i.e. the best you can ask for:
 @code
 void* data;
-Image2D image({4096, 4096}, ImageFormat::RGBA, ImageType::UnsignedByte, data);
+Image2D image({4096, 4096}, ColorFormat::RGBA, ColorType::UnsignedByte, data);
 
 Texture2D texture;
 texture.setMagnificationFilter(Sampler::Filter::Linear)
     .setMinificationFilter(Sampler::Filter::Linear, Sampler::Mipmap::Linear)
     .setWrapping(Sampler::Wrapping::ClampToEdge)
-    .setMaxAnisotropy(Sampler::maxSupportedAnisotropy())
+    .setMaxAnisotropy(Sampler::maxAnisotropy())
     .setStorage(Math::log2(4096)+1, TextureFormat::RGBA8, {4096, 4096})
     .setSubImage(0, {}, &image)
     .generateMipmap();
@@ -89,7 +89,7 @@ texture.setMagnificationFilter(Sampler::Filter::Linear)
 
 for(std::size_t i = 0; i != 16; ++i) {
     void* data = ...;
-    Image2D image({64, 64}, ImageFormat::RGBA, ImageType::UnsignedByte, image);
+    Image2D image({64, 64}, ColorFormat::RGBA, ColorType::UnsignedByte, image);
     texture.setSubImage(0, Vector3i::zAxis(i), image);
 }
 

src/TextureTools/distance-field.cpp

@@ -26,8 +26,8 @@
 #include <PluginManager/Manager.h>
 
 #include "Math/Geometry/Rectangle.h"
+#include "ColorFormat.h"
 #include "Image.h"
-#include "ImageFormat.h"
 #include "Renderer.h"
 #include "Texture.h"
 #include "TextureFormat.h"
@@ -90,7 +90,7 @@ int DistanceFieldConverter::exec() {
         return 1;
     }
 
-    if(image->format() != ImageFormat::Red) {
+    if(image->format() != ColorFormat::Red) {
         Error() << "Unsupported image format" << image->format();
         return 1;
     }
@@ -113,7 +113,7 @@ int DistanceFieldConverter::exec() {
     TextureTools::distanceField(input, output, {{}, args.value<Vector2i>("output-size")}, args.value<Int>("radius"), image->size());
 
     /* Save image */
-    Image2D result(ImageFormat::Red, ImageType::UnsignedByte);
+    Image2D result(ColorFormat::Red, ColorType::UnsignedByte);
     output.image(0, result);
     if(!converter->exportToFile(result, args.value("output"))) {
         Error() << "Cannot save file" << args.value("output");

src/Trade/ImageData.h

@@ -53,7 +53,7 @@ template<UnsignedInt dimensions> class ImageData: public AbstractImage {
          * Note that the image data are not copied on construction, but they
          * are deleted on class destruction.
          */
-        explicit ImageData(ImageFormat format, ImageType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, void* data): AbstractImage(format, type), _size(size), _data(reinterpret_cast<unsigned char*>(data)) {}
+        explicit ImageData(ColorFormat format, ColorType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, void* data): AbstractImage(format, type), _size(size), _data(reinterpret_cast<unsigned char*>(data)) {}
 
         /** @brief Copying is not allowed */
         ImageData(const ImageData<dimensions>&& other) = delete;

src/Trade/Test/AbstractImageConverterTest.cpp

@@ -27,7 +27,7 @@
 #include <TestSuite/Compare/FileToString.h>
 #include <Utility/Directory.h>
 
-#include "ImageFormat.h"
+#include "ColorFormat.h"
 #include "ImageReference.h"
 #include "Trade/AbstractImageConverter.h"
 
@@ -64,7 +64,7 @@ void AbstractImageConverterTest::exportToFile() {
 
     /* doExportToFile() should call doExportToData() */
     DataExporter exporter;
-    ImageReference2D image(ImageFormat::RGBA, ImageType::UnsignedByte, {0xfe, 0xed}, nullptr);
+    ImageReference2D image(ColorFormat::RGBA, ColorType::UnsignedByte, {0xfe, 0xed}, nullptr);
     CORRADE_VERIFY(exporter.exportToFile(image, Utility::Directory::join(TRADE_TEST_OUTPUT_DIR, "image.out")));
     CORRADE_COMPARE_AS(Utility::Directory::join(TRADE_TEST_OUTPUT_DIR, "image.out"),
         "\xFE\xED", TestSuite::Compare::FileToString);

src/Trade/Test/ImageDataTest.cpp

@@ -24,7 +24,7 @@
 
 #include <TestSuite/Tester.h>
 
-#include "ImageFormat.h"
+#include "ColorFormat.h"
 #include "Trade/ImageData.h"
 
 namespace Magnum { namespace Trade { namespace Test {
@@ -46,36 +46,36 @@ ImageDataTest::ImageDataTest() {
 
 void ImageDataTest::moveConstructor() {
     unsigned char* data = new unsigned char[3];
-    Trade::ImageData2D a(ImageFormat::Red, ImageType::UnsignedByte, {1, 3}, data);
+    Trade::ImageData2D a(ColorFormat::Red, ColorType::UnsignedByte, {1, 3}, data);
 
     Trade::ImageData2D b(std::move(a));
     CORRADE_VERIFY(!a.data());
-    CORRADE_COMPARE(b.format(), ImageFormat::Red);
-    CORRADE_COMPARE(b.type(), ImageType::UnsignedByte);
+    CORRADE_COMPARE(b.format(), ColorFormat::Red);
+    CORRADE_COMPARE(b.type(), ColorType::UnsignedByte);
     CORRADE_COMPARE(b.size(), Vector2i(1, 3));
     CORRADE_VERIFY(b.data() == data);
 }
 
 void ImageDataTest::moveAssignment() {
     unsigned char* data = new unsigned char[3];
-    Trade::ImageData2D a(ImageFormat::Red, ImageType::UnsignedByte, {1, 3}, data);
+    Trade::ImageData2D a(ColorFormat::Red, ColorType::UnsignedByte, {1, 3}, data);
 
-    Trade::ImageData2D b(ImageFormat::Red, ImageType::UnsignedByte, {}, nullptr);
+    Trade::ImageData2D b(ColorFormat::Red, ColorType::UnsignedByte, {}, nullptr);
     b = std::move(a);
     CORRADE_VERIFY(!a.data());
-    CORRADE_COMPARE(b.format(), ImageFormat::Red);
-    CORRADE_COMPARE(b.type(), ImageType::UnsignedByte);
+    CORRADE_COMPARE(b.format(), ColorFormat::Red);
+    CORRADE_COMPARE(b.type(), ColorType::UnsignedByte);
     CORRADE_COMPARE(b.size(), Vector2i(1, 3));
     CORRADE_VERIFY(b.data() == data);
 }
 
 void ImageDataTest::toReference() {
     unsigned char* data = new unsigned char[3];
-    Trade::ImageData2D a(ImageFormat::Red, ImageType::UnsignedByte, {1, 3}, data);
+    Trade::ImageData2D a(ColorFormat::Red, ColorType::UnsignedByte, {1, 3}, data);
 
     ImageReference2D b = a;
-    CORRADE_COMPARE(b.format(), ImageFormat::Red);
-    CORRADE_COMPARE(b.type(), ImageType::UnsignedByte);
+    CORRADE_COMPARE(b.format(), ColorFormat::Red);
+    CORRADE_COMPARE(b.type(), ColorType::UnsignedByte);
     CORRADE_COMPARE(b.size(), Vector2i(1, 3));
     CORRADE_COMPARE(b.data(), data);
 }