doc: compiled code snippets for the Shaders namespace.

Also not really without errors.

doc/shaders.dox

@@ -58,23 +58,7 @@ buffer into the mesh, you need to specify which shader attributes are on which
 position in the buffer. See @ref Mesh::addVertexBuffer() for details and usage
 examples. Example mesh configuration for @ref Shaders::Phong shader:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp shaders-setup
-struct Vertex {
-    Vector3 position;
-    Vector3 normal;
-    Vector2 textureCoordinates;
-};
-Vertex data[] = { ... };
-
-Buffer vertices;
-vertices.setData(data, BufferUsage::StaticDraw);
-
-Mesh mesh;
-mesh.addVertexBuffer(vertices, 0,
-    Shaders::Phong::Position{},
-    Shaders::Phong::Normal{},
-    Shaders::Phong::TextureCoordinates{});
-@endcode
 
 Each shader then has its own set of configuration functions. Some configuration
 is static, specified commonly as flags in constructor, directly affecting
@@ -82,19 +66,7 @@ compiled shader code. Other configuration is specified through uniforms and
 various binding points, commonly exposed through various setters. Example
 configuration and rendering using @ref Shaders::Phong :
 
-@code{.cpp}
+@snippet MagnumShaders.cpp shaders-rendering
-Matrix4 transformationMatrix, projectionMatrix;
-Texture2D diffuseTexture, specularTexture;
-
-Shaders::Phong shader{Shaders::Phong::DiffuseTexture};
-shader.setDiffuseTexture(diffuseTexture)
-    .setLightPosition({5.0f, 5.0f, 7.0f})
-    .setTransformationMatrix(transformationMatrix)
-    .setNormalMatrix(transformationMatrix.rotation())
-    .setProjectionMatrix(projectionMatrix);
-
-mesh.draw(shader);
-@endcode
 
 @section shaders-generic Generic vertex attributes
 
@@ -105,12 +77,7 @@ of generic attributes is available in @ref Shaders::Generic class.
 Configuration of the above mesh using generic attributes could then look like
 this:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp shaders-generic
-mesh.addVertexBuffer(vertices, 0,
-    Shaders::Generic3D::Position{},
-    Shaders::Generic3D::Normal{},
-    Shaders::Generic3D::TextureCoordinates{});
-@endcode
 
 Note that in this particular case both configurations are equivalent, because
 @ref Shaders::Phong also uses generic vertex attribute definitions.
@@ -119,15 +86,7 @@ Then you can render the mesh using @ref Shaders::Phong shader like above, or
 use for example @ref Shaders::Flat3D or even @ref Shaders::MeshVisualizer with
 the same mesh reconfiguration. The unused attributes will be simply ignored.
 
-@code{.cpp}
+@snippet MagnumShaders.cpp shaders-meshvisualizer
-Shaders::MeshVisualizer visualizerShader{Shaders::MeshVisualizer::Wireframe};
-visualizerShader.setColor(Color3::fromHSV(216.0_degf, 0.85f, 1.0f))
-    .setWireframeColor(Color3{0.95f})
-    .setViewportSize(defaultFramebuffer.viewport().size())
-    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
-
-mesh.draw(visualizerShader);
-@endcode
 
 The @ref MeshTools::compile() utility configures meshes using generic vertex
 attribute definitions to make them usable with any shader.

doc/snippets/CMakeLists.txt

@@ -34,7 +34,8 @@ if(CORRADE_TARGET_EMSCRIPTEN AND NOT TARGET_GLES2)
 endif()
 
 add_library(snippets STATIC
-    Magnum.cpp)
+    Magnum.cpp
+    MagnumShaders.cpp)
 target_link_libraries(snippets PRIVATE Magnum)
 set_target_properties(snippets PROPERTIES FOLDER "Magnum/doc/snippets")
 

doc/snippets/MagnumShaders.cpp

@@ -0,0 +1,426 @@
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
+              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 <numeric>
+
+#include "Magnum/Buffer.h"
+#include "Magnum/DefaultFramebuffer.h"
+#include "Magnum/Mesh.h"
+#include "Magnum/Texture.h"
+#include "Magnum/Math/Color.h"
+#include "Magnum/MeshTools/Duplicate.h"
+#include "Magnum/Shaders/DistanceFieldVector.h"
+#include "Magnum/Shaders/Flat.h"
+#include "Magnum/Shaders/MeshVisualizer.h"
+#include "Magnum/Shaders/Phong.h"
+#include "Magnum/Shaders/Vector.h"
+#include "Magnum/Shaders/VertexColor.h"
+
+using namespace Magnum;
+using namespace Magnum::Math::Literals;
+
+int main() {
+
+{
+/* [shaders-setup] */
+struct Vertex {
+    Vector3 position;
+    Vector3 normal;
+    Vector2 textureCoordinates;
+};
+Vertex data[60]{
+    // ...
+};
+
+Buffer vertices;
+vertices.setData(data, BufferUsage::StaticDraw);
+
+Mesh mesh;
+mesh.addVertexBuffer(vertices, 0,
+    Shaders::Phong::Position{},
+    Shaders::Phong::Normal{},
+    Shaders::Phong::TextureCoordinates{})
+     //...
+     ;
+/* [shaders-setup] */
+
+/* [shaders-rendering] */
+Matrix4 transformationMatrix, projectionMatrix;
+Texture2D diffuseTexture, specularTexture;
+
+Shaders::Phong shader{Shaders::Phong::Flag::DiffuseTexture};
+shader.setDiffuseTexture(diffuseTexture)
+    .setLightPosition({5.0f, 5.0f, 7.0f})
+    .setTransformationMatrix(transformationMatrix)
+    .setNormalMatrix(transformationMatrix.rotation())
+    .setProjectionMatrix(projectionMatrix);
+
+mesh.draw(shader);
+/* [shaders-rendering] */
+
+/* [shaders-generic] */
+mesh.addVertexBuffer(vertices, 0,
+    Shaders::Generic3D::Position{},
+    Shaders::Generic3D::Normal{},
+    Shaders::Generic3D::TextureCoordinates{});
+/* [shaders-generic] */
+
+/* [shaders-meshvisualizer] */
+Shaders::MeshVisualizer visualizerShader{Shaders::MeshVisualizer::Flag::Wireframe};
+visualizerShader
+    .setColor(0x2f83cc_rgbf)
+    .setWireframeColor(0xdcdcdc_rgbf)
+    .setViewportSize(Vector2{defaultFramebuffer.viewport().size()})
+    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
+
+mesh.draw(visualizerShader);
+/* [shaders-meshvisualizer] */
+}
+
+{
+/* [DistanceFieldVector-usage1] */
+struct Vertex {
+    Vector2 position;
+    Vector2 textureCoordinates;
+};
+Vertex data[60]{
+    // ...
+};
+
+Buffer vertices;
+vertices.setData(data, BufferUsage::StaticDraw);
+
+Mesh mesh;
+mesh.addVertexBuffer(vertices, 0,
+    Shaders::DistanceFieldVector2D::Position{},
+    Shaders::DistanceFieldVector2D::TextureCoordinates{})
+    // ...
+    ;
+/* [DistanceFieldVector-usage1] */
+}
+
+{
+Mesh mesh;
+/* [DistanceFieldVector-usage2] */
+Matrix3 transformationMatrix, projectionMatrix;
+Texture2D texture;
+
+Shaders::DistanceFieldVector2D shader;
+shader.setColor(0x2f83cc_rgbf)
+    .setOutlineColor(0xdcdcdc_rgbf)
+    .setOutlineRange(0.6f, 0.4f)
+    .setVectorTexture(texture)
+    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
+
+mesh.draw(shader);
+/* [DistanceFieldVector-usage2] */
+}
+
+{
+/* [Flat-usage-colored1] */
+struct Vertex {
+    Vector3 position;
+};
+Vertex data[60]{
+    //...
+};
+
+Buffer vertices;
+vertices.setData(data, BufferUsage::StaticDraw);
+
+Mesh mesh;
+mesh.addVertexBuffer(vertices, 0, Shaders::Flat3D::Position{})
+    // ...
+    ;
+/* [Flat-usage-colored1] */
+
+/* [Flat-usage-colored2] */
+Matrix4 transformationMatrix = Matrix4::translation(Vector3::zAxis(-5.0f));
+Matrix4 projectionMatrix = Matrix4::perspectiveProjection(35.0_degf, 1.0f, 0.001f, 100.0f);
+
+Shaders::Flat3D shader;
+shader.setColor(0x2f83cc_rgbf)
+    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
+
+mesh.draw(shader);
+/* [Flat-usage-colored2] */
+}
+
+{
+/* [Flat-usage-textured1] */
+struct Vertex {
+    Vector3 position;
+    Vector2 textureCoordinates;
+};
+Vertex data[60]{
+    // ...
+};
+
+Buffer vertices;
+vertices.setData(data, BufferUsage::StaticDraw);
+
+Mesh mesh;
+mesh.addVertexBuffer(vertices, 0,
+    Shaders::Flat3D::Position{},
+    Shaders::Flat3D::TextureCoordinates{})
+    // ...
+    ;
+/* [Flat-usage-textured1] */
+
+/* [Flat-usage-textured2] */
+Matrix4 transformationMatrix, projectionMatrix;
+Texture2D texture;
+
+Shaders::Flat3D shader{Shaders::Flat3D::Flag::Textured};
+shader.setTransformationProjectionMatrix(projectionMatrix*transformationMatrix)
+    .setTexture(texture);
+
+mesh.draw(shader);
+/* [Flat-usage-textured2] */
+}
+
+{
+/* [MeshVisualizer-usage-geom1] */
+struct Vertex {
+    Vector3 position;
+};
+Vertex data[60]{
+    // ...
+};
+
+Buffer vertices;
+vertices.setData(data, BufferUsage::StaticDraw);
+
+Mesh mesh;
+mesh.addVertexBuffer(vertices, 0, Shaders::MeshVisualizer::Position{});
+/* [MeshVisualizer-usage-geom1] */
+
+/* [MeshVisualizer-usage-geom2] */
+Matrix4 transformationMatrix = Matrix4::translation(Vector3::zAxis(-5.0f));
+Matrix4 projectionMatrix = Matrix4::perspectiveProjection(35.0_degf, 1.0f, 0.001f, 100.0f);
+
+Shaders::MeshVisualizer shader{Shaders::MeshVisualizer::Flag::Wireframe};
+shader.setColor(0x2f83cc_rgbf)
+    .setWireframeColor(0xdcdcdc_rgbf)
+    .setViewportSize(Vector2{defaultFramebuffer.viewport().size()})
+    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
+
+mesh.draw(shader);
+/* [MeshVisualizer-usage-geom2] */
+
+/* [MeshVisualizer-usage-no-geom-old1] */
+constexpr std::size_t vertexCount = Containers::arraySize(data);
+Float vertexIndex[vertexCount];
+std::iota(vertexIndex, vertexIndex + vertexCount, 0.0f);
+
+Buffer vertexIndices;
+vertexIndices.setData(vertexIndex, BufferUsage::StaticDraw);
+
+mesh.addVertexBuffer(vertexIndices, 0, Shaders::MeshVisualizer::VertexIndex{});
+/* [MeshVisualizer-usage-no-geom-old1] */
+}
+
+{
+Mesh mesh;
+/* [MeshVisualizer-usage-no-geom-old2] */
+Matrix4 transformationMatrix, projectionMatrix;
+
+Shaders::MeshVisualizer shader{Shaders::MeshVisualizer::Flag::Wireframe|
+                               Shaders::MeshVisualizer::Flag::NoGeometryShader};
+shader.setColor(0x2f83cc_rgbf)
+    .setWireframeColor(0xdcdcdc_rgbf)
+    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
+
+mesh.draw(shader);
+/* [MeshVisualizer-usage-no-geom-old2] */
+}
+
+{
+/* [MeshVisualizer-usage-no-geom] */
+std::vector<UnsignedInt> indices{
+    // ...
+};
+std::vector<Vector3> indexedPositions{
+    // ...
+};
+
+/* De-indexing the position array */
+Buffer vertices;
+vertices.setData(MeshTools::duplicate(indices, indexedPositions),
+                 BufferUsage::StaticDraw);
+
+Mesh mesh;
+mesh.addVertexBuffer(vertices, 0, Shaders::MeshVisualizer::Position{});
+/* [MeshVisualizer-usage-no-geom] */
+}
+
+{
+/* [Phong-usage-colored1] */
+struct Vertex {
+    Vector3 position;
+    Vector3 normal;
+};
+Vertex data[60]{
+    // ...
+};
+
+Buffer vertices;
+vertices.setData(data, BufferUsage::StaticDraw);
+
+Mesh mesh;
+mesh.addVertexBuffer(vertices, 0,
+    Shaders::Phong::Position{},
+    Shaders::Phong::Normal{});
+/* [Phong-usage-colored1] */
+
+/* [Phong-usage-colored2] */
+Matrix4 transformationMatrix = Matrix4::translation(Vector3::zAxis(-5.0f));
+Matrix4 projectionMatrix = Matrix4::perspectiveProjection(35.0_degf, 1.0f, 0.001f, 100.0f);
+
+Shaders::Phong shader;
+shader.setDiffuseColor(0x2f83cc_rgbf)
+    .setShininess(200.0f)
+    .setLightPosition({5.0f, 5.0f, 7.0f})
+    .setTransformationMatrix(transformationMatrix)
+    .setNormalMatrix(transformationMatrix.rotation())
+    .setProjectionMatrix(projectionMatrix);
+
+mesh.draw(shader);
+/* [Phong-usage-colored2] */
+}
+
+{
+/* [Phong-usage-texture1] */
+struct Vertex {
+    Vector3 position;
+    Vector3 normal;
+    Vector2 textureCoordinates;
+};
+Vertex data[60]{
+    // ...
+};
+
+Buffer vertices;
+vertices.setData(data, BufferUsage::StaticDraw);
+
+Mesh mesh;
+mesh.addVertexBuffer(vertices, 0,
+    Shaders::Phong::Position{},
+    Shaders::Phong::Normal{},
+    Shaders::Phong::TextureCoordinates{});
+/* [Phong-usage-texture1] */
+
+/* [Phong-usage-texture2] */
+Matrix4 transformationMatrix, projectionMatrix;
+Texture2D diffuseTexture, specularTexture;
+
+Shaders::Phong shader{Shaders::Phong::Flag::DiffuseTexture|
+                      Shaders::Phong::Flag::SpecularTexture};
+shader.setTextures(nullptr, &diffuseTexture, &specularTexture)
+    .setLightPosition({5.0f, 5.0f, 7.0f})
+    .setTransformationMatrix(transformationMatrix)
+    .setNormalMatrix(transformationMatrix.rotation())
+    .setProjectionMatrix(projectionMatrix);
+
+mesh.draw(shader);
+/* [Phong-usage-texture2] */
+}
+
+{
+Texture2D ambientAlphaTexture, diffuseAlphaTexture;
+Color3 diffuseRgb, specularRgb;
+/* [Phong-usage-alpha] */
+Shaders::Phong shader{Shaders::Phong::Flag::AmbientTexture|
+                      Shaders::Phong::Flag::DiffuseTexture};
+shader.setTextures(&ambientAlphaTexture, &diffuseAlphaTexture, nullptr)
+    .setAmbientColor(0x000000ff_rgbf)
+    .setDiffuseColor(Color4{diffuseRgb, 0.0f})
+    .setSpecularColor(Color4{specularRgb, 0.0f});
+/* [Phong-usage-alpha] */
+}
+
+{
+/* [Vector-usage1] */
+struct Vertex {
+    Vector2 position;
+    Vector2 textureCoordinates;
+};
+Vertex data[60]{
+    // ...
+};
+
+Buffer vertices;
+vertices.setData(data, BufferUsage::StaticDraw);
+
+Mesh mesh;
+mesh.addVertexBuffer(vertices, 0,
+    Shaders::Vector2D::Position{},
+    Shaders::Vector2D::TextureCoordinates{});
+/* [Vector-usage1] */
+
+/* [Vector-usage2] */
+Matrix3 transformationMatrix, projectionMatrix;
+Texture2D texture;
+
+Shaders::Vector2D shader;
+shader.setColor(0x2f83cc_rgbf)
+    .setVectorTexture(texture)
+    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
+
+mesh.draw(shader);
+/* [Vector-usage2] */
+}
+
+{
+/* [VertexColor-usage1] */
+struct Vertex {
+    Vector3 position;
+    Color3 color;
+};
+Vertex data[60]{
+    // ...
+};
+
+Buffer vertices;
+vertices.setData(data, BufferUsage::StaticDraw);
+
+Mesh mesh;
+mesh.addVertexBuffer(vertices, 0,
+    Shaders::VertexColor3D::Position{},
+    Shaders::VertexColor3D::Color{Shaders::VertexColor3D::Color::Components::Three});
+/* [VertexColor-usage1] */
+
+/* [VertexColor-usage2] */
+Matrix4 transformationMatrix = Matrix4::translation(Vector3::zAxis(-5.0f));
+Matrix4 projectionMatrix = Matrix4::perspectiveProjection(35.0_degf, 1.0f, 0.001f, 100.0f);
+
+Shaders::VertexColor3D shader;
+shader.setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
+
+mesh.draw(shader);
+/* [VertexColor-usage2] */
+}
+
+}

src/Magnum/Shaders/DistanceFieldVector.h

@@ -56,37 +56,11 @@ value passed to @ref setSmoothness(). You need to provide @ref Position and
 
 Common mesh setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp DistanceFieldVector-usage1
-struct Vertex {
-    Vector2 position;
-    Vector2 textureCoordinates;
-};
-Vertex data[] = { ... };
-
-Buffer vertices;
-vertices.setData(data, BufferUsage::StaticDraw);
-
-Mesh mesh;
-mesh.addVertexBuffer(vertices, 0,
-    Shaders::DistanceFieldVector2D::Position{},
-    Shaders::DistanceFieldVector2D::TextureCoordinates{});
-@endcode
 
 Common rendering setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp DistanceFieldVector-usage2
-Matrix3 transformationMatrix, projectionMatrix;
-Texture2D texture;
-
-Shaders::DistanceFieldVector2D shader;
-shader.setColor(0x2f83cc_rgbf)
-    .setOutlineColor(0xdcdcdc_rgbf)
-    .setOutlineRange(0.6f, 0.4f)
-    .setVectorTexture(texture)
-    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
-
-mesh.draw(shader);
-@endcode
 
 @see @ref shaders, @ref DistanceFieldVector2D, @ref DistanceFieldVector3D
 @todo Use fragment shader derivations to have proper smoothness in perspective/

src/Magnum/Shaders/Flat.h

@@ -68,64 +68,21 @@ For coloring the texture based on intensity you can use the @ref Vector shader.
 
 Common mesh setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Flat-usage-colored1
-struct Vertex {
-    Vector3 position;
-};
-Vertex data[] = { ... };
-
-Buffer vertices;
-vertices.setData(data, BufferUsage::StaticDraw);
-
-Mesh mesh;
-mesh.addVertexBuffer(vertices, 0, Shaders::Flat3D::Position{});
-@endcode
 
 Common rendering setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Flat-usage-colored2
-Matrix4 transformationMatrix = Matrix4::translation(Vector3::zAxis(-5.0f));
-Matrix4 projectionMatrix = Matrix4::perspectiveProjection(35.0_degf, 1.0f, 0.001f, 100.0f);
-
-Shaders::Flat3D shader;
-shader.setColor(0x2f83cc_rgbf)
-    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
-
-mesh.draw(shader);
-@endcode
 
 @subsection Shaders-Flat-usage-textured Textured mesh
 
 Common mesh setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Flat-usage-textured1
-struct Vertex {
-    Vector3 position;
-    Vector2 textureCoordinates;
-};
-Vertex data[] = { ... };
-
-Buffer vertices;
-vertices.setData(data, BufferUsage::StaticDraw);
-
-Mesh mesh;
-mesh.addVertexBuffer(vertices, 0,
-    Shaders::Flat3D::Position{},
-    Shaders::Flat3D::TextureCoordinates{});
-@endcode
 
 Common rendering setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Flat-usage-textured2
-Matrix4 transformationMatrix, projectionMatrix;
-Texture2D texture;
-
-Shaders::Flat3D shader{Shaders::Flat3D::Textured};
-shader.setTransformationProjectionMatrix(projectionMatrix*transformationMatrix)
-    .setTexture(texture);
-
-mesh.draw(shader);
-@endcode
 
 @see @ref shaders, @ref Flat2D, @ref Flat3D
 */

src/Magnum/Shaders/MeshVisualizer.h

@@ -77,79 +77,28 @@ is optionally used for improving line appearance.
 
 Common mesh setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp MeshVisualizer-usage-geom1
-struct Vertex {
-    Vector3 position;
-};
-Vertex data[] = { ... };
-
-Buffer vertices;
-vertices.setData(data, BufferUsage::StaticDraw);
-
-Mesh mesh;
-mesh.addVertexBuffer(vertices, 0, Shaders::MeshVisualizer::Position{});
-@endcode
 
 Common rendering setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp MeshVisualizer-usage-geom2
-Matrix4 transformationMatrix = Matrix4::translation(Vector3::zAxis(-5.0f));
-Matrix4 projectionMatrix = Matrix4::perspectiveProjection(35.0_degf, 1.0f, 0.001f, 100.0f);
-
-Shaders::MeshVisualizer shader{Shaders::MeshVisualizer::Wireframe};
-shader.setColor(0x2f83cc_rgbf)
-    .setWireframeColor(0xdcdcdc_rgbf)
-    .setViewportSize(defaultFramebuffer.viewport().size())
-    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
-
-mesh.draw(shader);
-@endcode
 
 @subsection Shaders-MeshVisualizer-usage-wireframe-no-geom-old Wireframe visualization without geometry shader on older hardware
 
 You need to provide also the @ref VertexIndex attribute. Mesh setup *in
 addition to the above*:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp MeshVisualizer-usage-no-geom-old1
-constexpr std::size_t vertexCount = std::extent<decltype(data)>::value;
-Float vertexIndex[vertexCount];
-std::iota(vertexIndex, vertexIndex + vertexCount, 0.0f);
-
-Buffer vertexIndices;
-vertexIndices.setData(vertexIndex, BufferUsage::StaticDraw);
-
-mesh.addVertexBuffer(vertexIndices, 0, Shaders::MeshVisualizer::VertexIndex{});
-@endcode
 
 Rendering setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp MeshVisualizer-usage-no-geom-old2
-Matrix4 transformationMatrix, projectionMatrix;
-
-Shaders::MeshVisualizer shader{Shaders::MeshVisualizer::Wireframe|
-                               Shaders::MeshVisualizer::NoGeometryShader};
-shader.setColor(0x2f83cc_rgbf)
-    .setWireframeColor(0xdcdcdc_rgbf)
-    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
-
-mesh.draw(shader);
-@endcode
 
 @subsection Shaders-MeshVisualizer-usage-wireframe-no-geom Wireframe visualization of indexed meshes without geometry shader
 
 The vertices must be converted to non-indexed array. Mesh setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp MeshVisualizer-usage-no-geom
-std::vector<UnsignedInt> indices{ ... };
-std::vector<Vector3> indexedPositions{ ... };
-
-// De-indexing the position array
-Buffer vertices;
-vertices.setData(MeshTools::duplicate(indices, indexedPositions), BufferUsage::StaticDraw);
-
-Mesh mesh;
-mesh.addVertexBuffer(vertices, 0, Shaders::MeshVisualizer::Position{});
-@endcode
 
 Rendering setup the same as above.
 

src/Magnum/Shaders/Phong.h

@@ -61,77 +61,21 @@ enabled textures.
 
 Common mesh setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Phong-usage-colored1
-struct Vertex {
-    Vector3 position;
-    Vector3 normal;
-};
-Vertex data[] = { ... };
-
-Buffer vertices;
-vertices.setData(data, BufferUsage::StaticDraw);
-
-Mesh mesh;
-mesh.addVertexBuffer(vertices, 0,
-    Shaders::Phong::Position{},
-    Shaders::Phong::Normal{});
-@endcode
 
 Common rendering setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Phong-usage-colored2
-Matrix4 transformationMatrix = Matrix4::translation(Vector3::zAxis(-5.0f));
-Matrix4 projectionMatrix = Matrix4::perspectiveProjection(35.0_degf, 1.0f, 0.001f, 100.0f);
-
-Shaders::Phong shader;
-shader.setDiffuseColor(0x2f83cc_rgbf)
-    .setShininess(200.0f)
-    .setLightPosition({5.0f, 5.0f, 7.0f})
-    .setTransformationMatrix(transformationMatrix)
-    .setNormalMatrix(transformationMatrix.rotation())
-    .setProjectionMatrix(projectionMatrix);
-
-mesh.draw(shader);
-@endcode
 
 @subsection Shaders-Phong-usage-texture Diffuse and specular texture
 
 Common mesh setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Phong-usage-texture1
-struct Vertex {
-    Vector3 position;
-    Vector3 normal;
-    Vector2 textureCoordinates;
-};
-Vertex data[] = { ... };
-
-Buffer vertices;
-vertices.setData(data, BufferUsage::StaticDraw);
-
-Mesh mesh;
-mesh.addVertexBuffer(vertices, 0,
-    Shaders::Phong::Position{},
-    Shaders::Phong::Normal{},
-    Shaders::Phong::TextureCoordinates{});
-@endcode
 
 Common rendering setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Phong-usage-texture2
-Matrix4 transformationMatrix, projectionMatrix;
-Texture2D diffuseTexture, specularTexture;
-
-Shaders::Phong shader{Shaders::Phong::DiffuseTexture|
-                      Shaders::Phong::SpecularTexture};
-shader.setTextures(nullptr, &diffuseTexture, &specularTexture)
-    .setLightPosition({5.0f, 5.0f, 7.0f})
-    .setTransformationMatrix(transformationMatrix)
-    .setNormalMatrix(transformationMatrix.rotation())
-    .setProjectionMatrix(projectionMatrix);
-
-mesh.draw(shader);
-@endcode
 
 @subsection Shaders-Phong-usage-alpha Alpha-masked drawing
 
@@ -141,14 +85,7 @@ ambient alpha will be taken into account. If you have diffuse texture combined
 with the alpha mask, you can use that texture for both ambient and diffuse
 part and then separate the alpha like this:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Phong-usage-alpha
-Shaders::Phong shader{Shaders::Phong::AmbientTexture|
-                      Shaders::Phong::DiffuseTexture};
-shader.setTextures(&diffuseAlphaTexture, &diffuseAlphaTexture, nullptr)
-    .setAmbientColor({0.0f, 0.0f, 0.0f, 1.0f})
-    .setDiffuseColor(Color4{diffuseRgb, 0.0f})
-    .setSpecularColor(Color4{specularRgb, 0.0f});
-@endcode
 
 @see @ref shaders
 */

src/Magnum/Shaders/Vector.h

@@ -55,35 +55,11 @@ attributes in your triangle mesh and call at least
 
 Common mesh setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Vector-usage1
-struct Vertex {
-    Vector2 position;
-    Vector2 textureCoordinates;
-};
-Vertex data[] = { ... };
-
-Buffer vertices;
-vertices.setData(data, BufferUsage::StaticDraw);
-
-Mesh mesh;
-mesh.addVertexBuffer(vertices, 0,
-    Shaders::Vector2D::Position{},
-    Shaders::Vector2D::TextureCoordinates{});
-@endcode
 
 Common rendering setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp Vector-usage2
-Matrix3 transformationMatrix, projectionMatrix;
-Texture2D texture;
-
-Shaders::Vector2D shader;
-shader.setColor(0x2f83cc_rgbf)
-    .setVectorTexture(texture)
-    .setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
-
-mesh.draw(shader);
-@endcode
 
 @see @ref shaders, @ref Vector2D, @ref Vector3D
 */

src/Magnum/Shaders/VertexColor.h

@@ -56,33 +56,11 @@ attribute --- the shader accepts four-component color attribute but, similarly
 to all other attributes, it's possible to supply also three-component colors if
 alpha is not important.
 
-@code{.cpp}
+@snippet MagnumShaders.cpp VertexColor-usage1
-struct Vertex {
-    Vector3 position;
-    Color3 color;
-};
-Vertex data[] = { ... };
-
-Buffer vertices;
-vertices.setData(data, BufferUsage::StaticDraw);
-
-Mesh mesh;
-mesh.addVertexBuffer(vertices, 0,
-    Shaders::VertexColor3D::Position{},
-    Shaders::VertexColor3D::Color{Shaders::VertexColor3D::Color::Components::Three});
-@endcode
 
 Common rendering setup:
 
-@code{.cpp}
+@snippet MagnumShaders.cpp VertexColor-usage2
-Matrix4 transformationMatrix = Matrix4::translation(Vector3::zAxis(-5.0f));
-Matrix4 projectionMatrix = Matrix4::perspectiveProjection(35.0_degf, 1.0f, 0.001f, 100.0f);
-
-Shaders::VertexColor3D shader;
-shader.setTransformationProjectionMatrix(projectionMatrix*transformationMatrix);
-
-mesh.draw(shader);
-@endcode
 
 @see @ref shaders, @ref VertexColor2D, @ref VertexColor3D
 */