/* This file is part of Magnum. Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš 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 #include #include #include #include "AbstractFramebuffer.h" #include "AbstractShaderProgram.h" #include "AbstractTexture.h" #include "Buffer.h" #include "BufferTexture.h" #include "DebugMarker.h" #include "DefaultFramebuffer.h" #include "Extensions.h" #include "Framebuffer.h" #include "Mesh.h" #include "Renderbuffer.h" #include "Renderer.h" #include "Implementation/State.h" namespace Magnum { #ifndef DOXYGEN_GENERATING_OUTPUT Debug operator<<(Debug debug, Version value) { switch(value) { #define _c(value, string) case Version::value: return debug << string; _c(None, "None") #ifndef MAGNUM_TARGET_GLES _c(GL210, "OpenGL 2.1") _c(GL300, "OpenGL 3.0") _c(GL310, "OpenGL 3.1") _c(GL320, "OpenGL 3.2") _c(GL330, "OpenGL 3.3") _c(GL400, "OpenGL 4.0") _c(GL410, "OpenGL 4.1") _c(GL420, "OpenGL 4.2") _c(GL430, "OpenGL 4.3") #else _c(GLES200, "OpenGL ES 2.0") _c(GLES300, "OpenGL ES 3.0") #endif #undef _c } return debug << "Invalid"; } #endif const std::vector& Extension::extensions(Version version) { #define _extension(prefix, vendor, extension) \ {Extensions::prefix::vendor::extension::Index, Extensions::prefix::vendor::extension::requiredVersion(), Extensions::prefix::vendor::extension::coreVersion(), Extensions::prefix::vendor::extension::string()} static const std::vector empty; #ifndef MAGNUM_TARGET_GLES static const std::vector extensions{ _extension(GL,AMD,vertex_shader_layer), // done _extension(GL,AMD,shader_trinary_minmax), // done _extension(GL,ARB,robustness), // done _extension(GL,EXT,texture_filter_anisotropic), // done _extension(GL,EXT,direct_state_access), _extension(GL,GREMEDY,string_marker)}; // done static const std::vector extensions300{ /** * @todo Remove as it doesn't have all functionality present in GL 3.0 * and leave only ARB_map_buffer_range? */ _extension(GL,APPLE,flush_buffer_range), // done _extension(GL,APPLE,vertex_array_object), // done _extension(GL,ARB,map_buffer_range), // done, replaces APPLE_flush_buffer_range _extension(GL,ARB,color_buffer_float), _extension(GL,ARB,half_float_pixel), // done _extension(GL,ARB,texture_float), // done _extension(GL,ARB,depth_buffer_float), // done _extension(GL,ARB,texture_rg), // done _extension(GL,ARB,framebuffer_object), _extension(GL,EXT,gpu_shader4), _extension(GL,EXT,packed_float), // done _extension(GL,EXT,texture_array), _extension(GL,EXT,texture_compression_rgtc), // done _extension(GL,EXT,texture_shared_exponent), // done _extension(GL,EXT,framebuffer_sRGB), _extension(GL,EXT,draw_buffers2), _extension(GL,EXT,texture_integer), _extension(GL,EXT,transform_feedback), _extension(GL,NV,half_float), // done _extension(GL,NV,depth_buffer_float), _extension(GL,NV,conditional_render)}; // done static const std::vector extensions310{ _extension(GL,ARB,texture_rectangle), _extension(GL,ARB,draw_instanced), _extension(GL,ARB,texture_buffer_object), _extension(GL,ARB,uniform_buffer_object), _extension(GL,ARB,copy_buffer), // done _extension(GL,EXT,texture_snorm), // done _extension(GL,NV,primitive_restart)}; static const std::vector extensions320{ _extension(GL,ARB,geometry_shader4), _extension(GL,ARB,depth_clamp), // done _extension(GL,ARB,draw_elements_base_vertex), _extension(GL,ARB,fragment_coord_conventions), // done _extension(GL,ARB,provoking_vertex), // done _extension(GL,ARB,seamless_cube_map), // done _extension(GL,ARB,sync), _extension(GL,ARB,texture_multisample), _extension(GL,ARB,vertex_array_bgra)}; // done static const std::vector extensions330{ _extension(GL,ARB,instanced_arrays), _extension(GL,ARB,blend_func_extended), _extension(GL,ARB,explicit_attrib_location), // done _extension(GL,ARB,occlusion_query2), // done _extension(GL,ARB,sampler_objects), _extension(GL,ARB,shader_bit_encoding), // done _extension(GL,ARB,texture_rgb10_a2ui), // done _extension(GL,ARB,texture_swizzle), _extension(GL,ARB,timer_query), _extension(GL,ARB,vertex_type_2_10_10_10_rev)}; // done static const std::vector extensions400{ _extension(GL,ARB,draw_buffers_blend), _extension(GL,ARB,sample_shading), _extension(GL,ARB,texture_cube_map_array), // done _extension(GL,ARB,texture_gather), _extension(GL,ARB,texture_query_lod), // done _extension(GL,ARB,draw_indirect), _extension(GL,ARB,gpu_shader5), _extension(GL,ARB,gpu_shader_fp64), // done _extension(GL,ARB,shader_subroutine), _extension(GL,ARB,tessellation_shader), _extension(GL,ARB,texture_buffer_object_rgb32), // done _extension(GL,ARB,transform_feedback2), _extension(GL,ARB,transform_feedback3)}; static const std::vector extensions410{ _extension(GL,ARB,ES2_compatibility), _extension(GL,ARB,get_program_binary), _extension(GL,ARB,separate_shader_objects), _extension(GL,ARB,shader_precision), // done _extension(GL,ARB,vertex_attrib_64bit), // done _extension(GL,ARB,viewport_array)}; static const std::vector extensions420{ _extension(GL,ARB,texture_compression_bptc), // done _extension(GL,ARB,base_instance), _extension(GL,ARB,shading_language_420pack), // done _extension(GL,ARB,transform_feedback_instanced), _extension(GL,ARB,compressed_texture_pixel_storage), _extension(GL,ARB,conservative_depth), // done _extension(GL,ARB,internalformat_query), _extension(GL,ARB,map_buffer_alignment), _extension(GL,ARB,shader_atomic_counters), _extension(GL,ARB,shader_image_load_store), _extension(GL,ARB,texture_storage)}; static const std::vector extensions430{ _extension(GL,ARB,arrays_of_arrays), // done _extension(GL,ARB,ES3_compatibility), _extension(GL,ARB,clear_buffer_object), _extension(GL,ARB,compute_shader), _extension(GL,ARB,copy_image), _extension(GL,KHR,debug), _extension(GL,ARB,explicit_uniform_location), _extension(GL,ARB,fragment_layer_viewport), // done _extension(GL,ARB,framebuffer_no_attachments), _extension(GL,ARB,internalformat_query2), _extension(GL,ARB,invalidate_subdata), // done _extension(GL,ARB,multi_draw_indirect), _extension(GL,ARB,program_interface_query), _extension(GL,ARB,robust_buffer_access_behavior), // done _extension(GL,ARB,shader_image_size), // done _extension(GL,ARB,shader_storage_buffer_object), _extension(GL,ARB,stencil_texturing), _extension(GL,ARB,texture_buffer_range), // done _extension(GL,ARB,texture_query_levels), // done _extension(GL,ARB,texture_storage_multisample), _extension(GL,ARB,texture_view), _extension(GL,ARB,vertex_attrib_binding)}; #undef _extension #else static const std::vector extensions{ _extension(GL,APPLE,texture_format_BGRA8888), _extension(GL,EXT,texture_filter_anisotropic), _extension(GL,EXT,texture_format_BGRA8888), _extension(GL,EXT,read_format_bgra), _extension(GL,EXT,debug_marker), _extension(GL,EXT,disjoint_timer_query), _extension(GL,EXT,separate_shader_objects), _extension(GL,EXT,sRGB), /** * @todo Support also IMG_multisampled_render_to_texture? It has * different enum values (!) */ _extension(GL,EXT,multisampled_render_to_texture), _extension(GL,EXT,robustness), _extension(GL,KHR,debug), _extension(GL,NV,read_buffer_front), _extension(GL,NV,read_stencil), _extension(GL,NV,texture_border_clamp), // done _extension(GL,OES,depth32), _extension(GL,OES,mapbuffer), _extension(GL,OES,stencil1), _extension(GL,OES,stencil4), _extension(GL,OES,texture_3D)}; static const std::vector extensionsES300{ _extension(GL,ANGLE,framebuffer_blit), _extension(GL,ANGLE,framebuffer_multisample), _extension(GL,ANGLE,depth_texture), // done _extension(GL,APPLE,framebuffer_multisample), _extension(GL,ARM,rgba8), _extension(GL,EXT,texture_type_2_10_10_10_REV), _extension(GL,EXT,discard_framebuffer), _extension(GL,EXT,blend_minmax), _extension(GL,EXT,occlusion_query_boolean), _extension(GL,EXT,texture_rg), _extension(GL,EXT,texture_storage), _extension(GL,EXT,map_buffer_range), _extension(GL,NV,draw_buffers), _extension(GL,NV,read_buffer), _extension(GL,NV,read_depth), _extension(GL,NV,read_depth_stencil), _extension(GL,NV,framebuffer_blit), // done _extension(GL,NV,framebuffer_multisample), _extension(GL,OES,depth24), _extension(GL,OES,element_index_uint), _extension(GL,OES,rgb8_rgba8), _extension(GL,OES,texture_half_float_linear), _extension(GL,OES,texture_float_linear), _extension(GL,OES,texture_half_float), _extension(GL,OES,texture_float), _extension(GL,OES,vertex_half_float), _extension(GL,OES,packed_depth_stencil), _extension(GL,OES,depth_texture), _extension(GL,OES,standard_derivatives), // done _extension(GL,OES,vertex_array_object), _extension(GL,OES,required_internalformat), _extension(GL,OES,surfaceless_context)}; // done #endif switch(version) { case Version::None: return extensions; #ifndef MAGNUM_TARGET_GLES case Version::GL210: return empty; case Version::GL300: return extensions300; case Version::GL310: return extensions310; case Version::GL320: return extensions320; case Version::GL330: return extensions330; case Version::GL400: return extensions400; /* case Version::GLES200: */ case Version::GL410: return extensions410; case Version::GL420: return extensions420; /* case Version::GLES300: */ case Version::GL430: return extensions430; #else case Version::GLES200: return empty; case Version::GLES300: return extensionsES300; #endif } return empty; } Context* Context::_current = nullptr; Context::Context() { /* Version */ #ifndef MAGNUM_TARGET_GLES2 glGetIntegerv(GL_MAJOR_VERSION, &_majorVersion); glGetIntegerv(GL_MINOR_VERSION, &_minorVersion); #else _majorVersion = 2; _minorVersion = 0; #endif _version = static_cast(_majorVersion*100+_minorVersion*10); #ifndef MAGNUM_TARGET_GLES CORRADE_ASSERT(isVersionSupported(Version::GL210), "Context: unsupported OpenGL version" << Int(_version), ); #elif defined(MAGNUM_TARGET_GLES2) CORRADE_ASSERT(isVersionSupported(Version::GLES200), "Context: unsupported OpenGL ES version" << Int(_version), ); #else CORRADE_ASSERT(isVersionSupported(Version::GLES300), "Context: unsupported OpenGL ES version" << Int(_version), ); #endif /* Context flags are supported since GL 3.0 */ #ifndef MAGNUM_TARGET_GLES /** * @todo According to KHR_debug specs this should be also present in ES2 * if KHR_debug is available, but in headers it is nowhere to be found */ if(isVersionSupported(Version::GL300)) glGetIntegerv(GL_CONTEXT_FLAGS, reinterpret_cast(&_flags)); #endif /* Get first future (not supported) version */ std::vector versions{ #ifndef MAGNUM_TARGET_GLES Version::GL300, Version::GL310, Version::GL320, Version::GL330, Version::GL400, Version::GL410, Version::GL420, Version::GL430, #else Version::GLES200, Version::GLES300, #endif Version::None }; std::size_t future = 0; while(versions[future] != Version::None && isVersionSupported(versions[future])) ++future; /* List of extensions from future versions (extensions from current and previous versions should be supported automatically, so we don't need to check for them) */ std::unordered_map futureExtensions; for(std::size_t i = future; i != versions.size(); ++i) for(const Extension& extension: Extension::extensions(versions[i])) #ifndef CORRADE_GCC46_COMPATIBILITY futureExtensions.emplace(extension._string, extension); #else futureExtensions.insert({extension._string, extension}); #endif /* Check for presence of extensions in future versions */ #ifndef MAGNUM_TARGET_GLES2 GLint extensionCount = 0; glGetIntegerv(GL_NUM_EXTENSIONS, &extensionCount); #ifndef MAGNUM_TARGET_GLES3 if(extensionCount || isVersionSupported(Version::GL300)) #endif { _supportedExtensions.reserve(extensionCount); for(GLint i = 0; i != extensionCount; ++i) { const std::string extension(reinterpret_cast(glGetStringi(GL_EXTENSIONS, i))); auto found = futureExtensions.find(extension); if(found != futureExtensions.end()) { _supportedExtensions.push_back(found->second); extensionStatus.set(found->second._index); } } } #ifndef MAGNUM_TARGET_GLES3 else #endif #endif #ifndef MAGNUM_TARGET_GLES3 /* OpenGL 2.1 / OpenGL ES 2.0 doesn't have glGetStringi() */ { /* Don't crash when glGetString() returns nullptr */ const char* e = reinterpret_cast(glGetString(GL_EXTENSIONS)); if(e) { std::vector extensions = Utility::String::split(e, ' '); for(const std::string& extension: extensions) { auto found = futureExtensions.find(extension); if(found != futureExtensions.end()) { _supportedExtensions.push_back(found->second); extensionStatus.set(found->second._index); } } } } #endif /* Set this context as current */ CORRADE_ASSERT(!_current, "Context: Another context currently active", ); _current = this; /* Initialize state tracker */ _state = new Implementation::State; /* Initialize functionality based on current OpenGL version and extensions */ AbstractFramebuffer::initializeContextBasedFunctionality(this); AbstractShaderProgram::initializeContextBasedFunctionality(this); AbstractTexture::initializeContextBasedFunctionality(this); Buffer::initializeContextBasedFunctionality(this); #ifndef MAGNUM_TARGET_GLES BufferTexture::initializeContextBasedFunctionality(this); #endif DebugMarker::initializeContextBasedFunctionality(this); DefaultFramebuffer::initializeContextBasedFunctionality(this); Framebuffer::initializeContextBasedFunctionality(this); Mesh::initializeContextBasedFunctionality(this); Renderbuffer::initializeContextBasedFunctionality(this); Renderer::initializeContextBasedFunctionality(this); } Context::~Context() { CORRADE_ASSERT(_current == this, "Context: Cannot destroy context which is not currently active", ); delete _state; _current = nullptr; } std::vector Context::shadingLanguageVersionStrings() const { #ifndef MAGNUM_TARGET_GLES GLint versionCount = 0; glGetIntegerv(GL_NUM_SHADING_LANGUAGE_VERSIONS, &versionCount); /* The implementation doesn't yet support this query (< OpenGL 4.3) */ if(!versionCount) return {shadingLanguageVersionString()}; /* Get all of them */ std::vector versions; versions.reserve(versionCount); for(GLint i = 0; i != versionCount; ++i) versions.push_back(reinterpret_cast(glGetStringi(GL_SHADING_LANGUAGE_VERSION, i))); return std::move(versions); #else return {shadingLanguageVersionString()}; #endif } Version Context::supportedVersion(std::initializer_list versions) const { for(auto version: versions) if(isVersionSupported(version)) return version; #ifndef MAGNUM_TARGET_GLES return Version::GL210; #else return Version::GLES200; #endif } }