this repo has no description
Added support for non-core FBOs (EXT for GL 2- and OES for GLES 1.1). Thanks Vitaly!
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include/SDL_gpu.h
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include/SDL_gpu.h
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static const GPU_FeatureEnum GPU_FEATURE_PIXEL_SHADER = 0x200;
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static const GPU_FeatureEnum GPU_FEATURE_GEOMETRY_SHADER = 0x400;
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static const GPU_FeatureEnum GPU_FEATURE_WRAP_REPEAT_MIRRORED = 0x800;
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static const GPU_FeatureEnum GPU_FEATURE_CORE_FRAMEBUFFER_OBJECTS = 0x1000;
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/*! Combined feature flags */
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#define GPU_FEATURE_ALL_BASE GPU_FEATURE_RENDER_TARGETS
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src/renderer_GLES_2.c
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src/renderer_GLES_2.c
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src/renderer_GLES_3.c
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src/renderer_GLES_3.c
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src/renderer_GL_common.inl
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src/renderer_GL_common.inl
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#endif
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}
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// Define intermediates for FBO functions in case we only have EXT or OES FBO support.
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#if defined(SDL_GPU_ASSUME_CORE_FBO)
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#define glBindFramebufferPROC glBindFramebuffer
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#define glCheckFramebufferStatusPROC glCheckFramebufferStatus
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#define glDeleteFramebuffersPROC glDeleteFramebuffers
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#define glFramebufferTexture2DPROC glFramebufferTexture2D
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#define glGenFramebuffersPROC glGenFramebuffers
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#define glGenerateMipmapPROC glGenerateMipmap
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#else
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static void GLAPIENTRY glBindFramebufferNOOP(GLenum target, GLuint framebuffer)
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{
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GPU_LogError("%s: Unsupported operation\n", __func__);
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}
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static GLenum GLAPIENTRY glCheckFramebufferStatusNOOP(GLenum target)
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{
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GPU_LogError("%s: Unsupported operation\n", __func__);
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return 0;
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}
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static void GLAPIENTRY glDeleteFramebuffersNOOP(GLsizei n, const GLuint* framebuffers)
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{
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GPU_LogError("%s: Unsupported operation\n", __func__);
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}
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static void GLAPIENTRY glFramebufferTexture2DNOOP(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level)
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{
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GPU_LogError("%s: Unsupported operation\n", __func__);
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}
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static void GLAPIENTRY glGenFramebuffersNOOP(GLsizei n, GLuint *ids)
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{
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GPU_LogError("%s: Unsupported operation\n", __func__);
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}
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static void GLAPIENTRY glGenerateMipmapNOOP(GLenum target)
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{
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GPU_LogError("%s: Unsupported operation\n", __func__);
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}
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static void (GLAPIENTRY *glBindFramebufferPROC)(GLenum target, GLuint framebuffer) = glBindFramebufferNOOP;
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static GLenum (GLAPIENTRY *glCheckFramebufferStatusPROC)(GLenum target) = glCheckFramebufferStatusNOOP;
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static void (GLAPIENTRY *glDeleteFramebuffersPROC)(GLsizei n, const GLuint* framebuffers) = glDeleteFramebuffersNOOP;
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static void (GLAPIENTRY *glFramebufferTexture2DPROC)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level) = glFramebufferTexture2DNOOP;
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static void (GLAPIENTRY *glGenFramebuffersPROC)(GLsizei n, GLuint *ids) = glGenFramebuffersNOOP;
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static void (GLAPIENTRY *glGenerateMipmapPROC)(GLenum target) = glGenerateMipmapNOOP;
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#endif
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static void init_features(GPU_Renderer* renderer)
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{
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#endif
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#endif
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// FBO
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#ifdef SDL_GPU_USE_OPENGL
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#if SDL_GPU_GL_MAJOR_VERSION >= 3
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// Core in GL 3+
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// FBO support
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#ifdef SDL_GPU_ASSUME_CORE_FBO
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renderer->enabled_features |= GPU_FEATURE_RENDER_TARGETS;
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renderer->enabled_features |= GPU_FEATURE_CORE_FRAMEBUFFER_OBJECTS;
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#elif defined(SDL_GPU_USE_OPENGL)
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if(isExtensionSupported("GL_ARB_framebuffer_object"))
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{
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renderer->enabled_features |= GPU_FEATURE_RENDER_TARGETS;
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#else
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if(isExtensionSupported("GL_EXT_framebuffer_object"))
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renderer->enabled_features |= GPU_FEATURE_RENDER_TARGETS;
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else
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renderer->enabled_features &= ~GPU_FEATURE_RENDER_TARGETS;
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#endif
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renderer->enabled_features |= GPU_FEATURE_CORE_FRAMEBUFFER_OBJECTS;
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glBindFramebufferPROC = glBindFramebuffer;
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glCheckFramebufferStatusPROC = glCheckFramebufferStatus;
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glDeleteFramebuffersPROC = glDeleteFramebuffers;
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glFramebufferTexture2DPROC = glFramebufferTexture2D;
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glGenFramebuffersPROC = glGenFramebuffers;
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glGenerateMipmapPROC = glGenerateMipmap;
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}
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else if(isExtensionSupported("GL_EXT_framebuffer_object"))
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{
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renderer->enabled_features |= GPU_FEATURE_RENDER_TARGETS;
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glBindFramebufferPROC = glBindFramebufferEXT;
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glCheckFramebufferStatusPROC = glCheckFramebufferStatusEXT;
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glDeleteFramebuffersPROC = glDeleteFramebuffersEXT;
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glFramebufferTexture2DPROC = glFramebufferTexture2DEXT;
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glGenFramebuffersPROC = glGenFramebuffersEXT;
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glGenerateMipmapPROC = glGenerateMipmapEXT;
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}
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else
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renderer->enabled_features &= ~GPU_FEATURE_RENDER_TARGETS;
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#elif defined(SDL_GPU_USE_GLES)
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#if SDL_GPU_GLES_MAJOR_VERSION >= 2
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// Core in GLES 2+
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if(isExtensionSupported("GL_OES_framebuffer_object"))
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{
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renderer->enabled_features |= GPU_FEATURE_RENDER_TARGETS;
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#else
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if(isExtensionSupported("GL_OES_framebuffer_object"))
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renderer->enabled_features |= GPU_FEATURE_RENDER_TARGETS;
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else
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renderer->enabled_features &= ~GPU_FEATURE_RENDER_TARGETS;
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#endif
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glBindFramebufferPROC = glBindFramebufferOES;
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glCheckFramebufferStatusPROC = glCheckFramebufferStatusOES;
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glDeleteFramebuffersPROC = glDeleteFramebuffersOES;
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glFramebufferTexture2DPROC = glFramebufferTexture2DOES;
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glGenFramebuffersPROC = glGenFramebuffersOES;
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glGenerateMipmapPROC = glGenerateMipmapOES;
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}
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else
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renderer->enabled_features &= ~GPU_FEATURE_RENDER_TARGETS;
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#endif
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// Blending
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static void extBindFramebuffer(GPU_Renderer* renderer, GLuint handle)
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{
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if(renderer->enabled_features & GPU_FEATURE_RENDER_TARGETS)
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glBindFramebuffer(GL_FRAMEBUFFER, handle);
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glBindFramebufferPROC(GL_FRAMEBUFFER, handle);
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}
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if(renderer->current_context_target != NULL)
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flushAndClearBlitBufferIfCurrentFramebuffer(renderer, image->target);
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if(tdata->handle != 0)
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glDeleteFramebuffers(1, &tdata->handle);
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glDeleteFramebuffersPROC(1, &tdata->handle);
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tdata->handle = 0;
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}
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GPU_TARGET_DATA* tdata = (GPU_TARGET_DATA*)target->data;
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// Create framebuffer object
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glGenFramebuffers(1, &tdata->handle);
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glGenFramebuffersPROC(1, &tdata->handle);
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if(tdata->handle == 0)
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{
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GPU_PushErrorCode("GPU_ReplaceImage", GPU_ERROR_BACKEND_ERROR, "Failed to create new framebuffer target.");
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flushAndBindFramebuffer(renderer, tdata->handle);
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// Attach the texture to it
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, data->handle, 0);
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glFramebufferTexture2DPROC(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, data->handle, 0);
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status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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status = glCheckFramebufferStatusPROC(GL_FRAMEBUFFER);
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if(status != GL_FRAMEBUFFER_COMPLETE)
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{
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GPU_PushErrorCode("GPU_ReplaceImage", GPU_ERROR_BACKEND_ERROR, "Failed to recreate framebuffer target.");
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return NULL;
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// Create framebuffer object
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glGenFramebuffers(1, &handle);
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glGenFramebuffersPROC(1, &handle);
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flushAndBindFramebuffer(renderer, handle);
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// Attach the texture to it
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, ((GPU_IMAGE_DATA*)image->data)->handle, 0);
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glFramebufferTexture2DPROC(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, ((GPU_IMAGE_DATA*)image->data)->handle, 0);
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status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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status = glCheckFramebufferStatusPROC(GL_FRAMEBUFFER);
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if(status != GL_FRAMEBUFFER_COMPLETE)
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return NULL;
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···
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &default_framebuffer_handle);
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if(data->handle != default_framebuffer_handle)
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glDeleteFramebuffers(1, &data->handle);
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glDeleteFramebuffersPROC(1, &data->handle);
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}
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SDL_free(data);
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if(image->target != NULL && isCurrentTarget(renderer, image->target))
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renderer->impl->FlushBlitBuffer(renderer);
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bindTexture(renderer, image);
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glGenerateMipmap(GL_TEXTURE_2D);
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glGenerateMipmapPROC(GL_TEXTURE_2D);
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image->has_mipmaps = GPU_TRUE;
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glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, &filter);
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src/renderer_OpenGL_3.c
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src/renderer_OpenGL_3.c
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src/renderer_OpenGL_4.c
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src/renderer_OpenGL_4.c