this repo has no description
Factored out the code to get the GL and GLSL versions.
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src/renderer_GL_common.inl
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src/renderer_GL_common.inl
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return ((renderer->enabled_features & feature) == feature);
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}
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static Uint8 get_GL_version(int* major, int* minor)
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{
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const char* version_string;
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#ifdef SDL_GPU_USE_OPENGL
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// OpenGL < 3.0 doesn't have GL_MAJOR_VERSION. Check via version string instead.
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version_string = (const char*)glGetString(GL_VERSION);
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if(sscanf(version_string, "%d.%d", major, minor) <= 0)
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{
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// Failure
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*major = SDL_GPU_GL_MAJOR_VERSION;
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#if SDL_GPU_GL_MAJOR_VERSION != 3
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*minor = 1;
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#else
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*minor = 0;
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#endif
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GPU_PushErrorCode(__func__, GPU_ERROR_BACKEND_ERROR, "Failed to parse OpenGL version string: \"%s\"", version_string);
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return 0;
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}
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return 1;
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#else
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// GLES doesn't have GL_MAJOR_VERSION. Check via version string instead.
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version_string = (const char*)glGetString(GL_VERSION);
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// OpenGL ES 2.0?
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if(sscanf(version_string, "OpenGL ES %d.%d", major, minor) <= 0)
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{
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// OpenGL ES-CM 1.1? OpenGL ES-CL 1.1?
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if(sscanf(version_string, "OpenGL ES-C%*c %d.%d", major, minor) <= 0)
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{
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// Failure
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*major = SDL_GPU_GLES_MAJOR_VERSION;
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#if SDL_GPU_GLES_MAJOR_VERSION == 1
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*minor = 1;
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#else
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*minor = 0;
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#endif
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GPU_PushErrorCode(__func__, GPU_ERROR_BACKEND_ERROR, "Failed to parse OpenGL ES version string: \"%s\"", version_string);
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return 0;
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}
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}
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return 1;
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#endif
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}
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static Uint8 get_GLSL_version(int* version)
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{
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#ifndef SDL_GPU_DISABLE_SHADERS
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const char* version_string;
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int major, minor;
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#ifdef SDL_GPU_USE_OPENGL
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{
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version_string = (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
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if(version_string == NULL || sscanf(version_string, "%d.%d", &major, &minor) <= 0)
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{
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GPU_PushErrorCode(__func__, GPU_ERROR_BACKEND_ERROR, "Failed to parse GLSL version string: \"%s\"", version_string);
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*version = SDL_GPU_GLSL_VERSION;
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return 0;
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}
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else
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*version = major*100 + minor;
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}
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#else
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{
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version_string = (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
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if(version_string == NULL || sscanf(version_string, "OpenGL ES GLSL ES %d.%d", &major, &minor) <= 0)
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{
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GPU_PushErrorCode(__func__, GPU_ERROR_BACKEND_ERROR, "Failed to parse GLSL ES version string: \"%s\"", version_string);
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*version = SDL_GPU_GLSL_VERSION;
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return 0;
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}
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else
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*version = major*100 + minor;
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}
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#endif
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#endif
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return 1;
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}
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static Uint8 get_API_versions(GPU_Renderer* renderer)
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{
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return (get_GL_version(&renderer->id.major_version, &renderer->id.minor_version)
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&& get_GLSL_version(&renderer->max_shader_version));
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}
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static GPU_Target* CreateTargetFromWindow(GPU_Renderer* renderer, Uint32 windowID, GPU_Target* target)
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{
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#ifdef SDL_GPU_USE_OPENGL
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GLenum err;
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#endif
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const char* version_string;
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GPU_FeatureEnum required_features = GPU_GetRequiredFeatures();
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if(target == NULL)
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &framebuffer_handle);
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((GPU_TARGET_DATA*)target->data)->handle = framebuffer_handle;
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// Update our renderer info from the current GL context.
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#ifdef SDL_GPU_USE_OPENGL
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// OpenGL < 3.0 doesn't have GL_MAJOR_VERSION. Check via version string instead.
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version_string = (const char*)glGetString(GL_VERSION);
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if(sscanf(version_string, "%d.%d", &renderer->id.major_version, &renderer->id.minor_version) <= 0)
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{
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renderer->id.major_version = SDL_GPU_GL_MAJOR_VERSION;
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#if SDL_GPU_GL_MAJOR_VERSION != 3
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renderer->id.minor_version = 1;
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#else
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renderer->id.minor_version = 0;
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#endif
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GPU_PushErrorCode("GPU_CreateTargetFromWindow", GPU_ERROR_BACKEND_ERROR, "Failed to parse OpenGL version string: \"%s\"", version_string);
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}
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#ifndef SDL_GPU_DISABLE_SHADERS
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// Check max GLSL version
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{
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int major, minor;
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version_string = (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
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if(sscanf(version_string, "%d.%d", &major, &minor) <= 0)
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{
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GPU_PushErrorCode("GPU_CreateTargetFromWindow", GPU_ERROR_BACKEND_ERROR, "Failed to parse GLSL version string: \"%s\"", version_string);
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}
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else
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renderer->max_shader_version = major*100 + minor;
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}
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#endif
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#else
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// GLES doesn't have GL_MAJOR_VERSION. Check via version string instead.
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version_string = (const char*)glGetString(GL_VERSION);
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// OpenGL ES 2.0?
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if(sscanf(version_string, "OpenGL ES %d.%d", &renderer->id.major_version, &renderer->id.minor_version) <= 0)
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{
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// OpenGL ES-CM 1.1? OpenGL ES-CL 1.1?
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if(sscanf(version_string, "OpenGL ES-C%*c %d.%d", &renderer->id.major_version, &renderer->id.minor_version) <= 0)
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{
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renderer->id.major_version = SDL_GPU_GLES_MAJOR_VERSION;
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#if SDL_GPU_GLES_MAJOR_VERSION == 1
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renderer->id.minor_version = 1;
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#else
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renderer->id.minor_version = 0;
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#endif
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GPU_PushErrorCode("GPU_CreateTargetFromWindow", GPU_ERROR_BACKEND_ERROR, "Failed to parse OpenGL version string: \"%s\"", version_string);
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}
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}
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#ifndef SDL_GPU_DISABLE_SHADERS
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// Check max GLSL version
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{
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int major, minor;
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version_string = (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
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if(sscanf(version_string, "OpenGL ES GLSL ES %d.%d", &major, &minor) <= 0)
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{
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GPU_PushErrorCode("GPU_CreateTargetFromWindow", GPU_ERROR_BACKEND_ERROR, "Failed to parse GLSL version string: \"%s\"", version_string);
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}
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else
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renderer->max_shader_version = major*100 + minor;
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}
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#endif
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#endif
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// Update our renderer info from the current GL context.
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if(!get_API_versions(renderer))
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GPU_PushErrorCode("GPU_CreateTargetFromWindow", GPU_ERROR_BACKEND_ERROR, "Failed to get backend API versions.");
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// Did the wrong runtime library try to use a later versioned renderer?
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if(renderer->id.major_version < renderer->requested_id.major_version)
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target->context->failed = 1;
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return NULL;
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}
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init_features(renderer);
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