| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "GrTypes.h" |
| #include "gl/GrGLInterface.h" |
| #include "gl/GrGLDefines.h" |
| |
| #include <stdio.h> |
| |
| #if GR_GL_PER_GL_FUNC_CALLBACK |
| namespace { |
| void GrGLDefaultInterfaceCallback(const GrGLInterface*) {} |
| } |
| #endif |
| |
| GrGLBinding GrGLGetBindingInUseFromString(const char* versionString) { |
| if (NULL == versionString) { |
| GrAssert(!"NULL GL version string."); |
| return kNone_GrGLBinding; |
| } |
| |
| int major, minor; |
| |
| // check for desktop |
| int n = sscanf(versionString, "%d.%d", &major, &minor); |
| if (2 == n) { |
| return kDesktop_GrGLBinding; |
| } |
| |
| // check for ES 1 |
| char profile[2]; |
| n = sscanf(versionString, "OpenGL ES-%c%c %d.%d", profile, profile+1, |
| &major, &minor); |
| if (4 == n) { |
| // we no longer support ES1. |
| return kNone_GrGLBinding; |
| } |
| |
| // check for ES2 |
| n = sscanf(versionString, "OpenGL ES %d.%d", &major, &minor); |
| if (2 == n) { |
| return kES2_GrGLBinding; |
| } |
| return kNone_GrGLBinding; |
| } |
| |
| GrGLVersion GrGLGetVersionFromString(const char* versionString) { |
| if (NULL == versionString) { |
| GrAssert(!"NULL GL version string."); |
| return 0; |
| } |
| |
| int major, minor; |
| |
| int n = sscanf(versionString, "%d.%d", &major, &minor); |
| if (2 == n) { |
| return GR_GL_VER(major, minor); |
| } |
| |
| char profile[2]; |
| n = sscanf(versionString, "OpenGL ES-%c%c %d.%d", profile, profile+1, |
| &major, &minor); |
| if (4 == n) { |
| return GR_GL_VER(major, minor); |
| } |
| |
| n = sscanf(versionString, "OpenGL ES %d.%d", &major, &minor); |
| if (2 == n) { |
| return GR_GL_VER(major, minor); |
| } |
| |
| return 0; |
| } |
| |
| GrGLSLVersion GrGLGetGLSLVersionFromString(const char* versionString) { |
| if (NULL == versionString) { |
| GrAssert(!"NULL GLSL version string."); |
| return 0; |
| } |
| |
| int major, minor; |
| |
| int n = sscanf(versionString, "%d.%d", &major, &minor); |
| if (2 == n) { |
| return GR_GLSL_VER(major, minor); |
| } |
| |
| n = sscanf(versionString, "OpenGL ES GLSL ES %d.%d", &major, &minor); |
| if (2 == n) { |
| return GR_GLSL_VER(major, minor); |
| } |
| |
| // android hack |
| n = sscanf(versionString, "OpenGL ES GLSL %d.%d", &major, &minor); |
| if (2 == n) { |
| return GR_GLSL_VER(major, minor); |
| } |
| |
| return 0; |
| } |
| |
| bool GrGLHasExtensionFromString(const char* ext, const char* extensionString) { |
| int extLength = strlen(ext); |
| |
| while (true) { |
| int n = strcspn(extensionString, " "); |
| if (n == extLength && 0 == strncmp(ext, extensionString, n)) { |
| return true; |
| } |
| if (0 == extensionString[n]) { |
| return false; |
| } |
| extensionString += n+1; |
| } |
| |
| return false; |
| } |
| |
| bool GrGLHasExtension(const GrGLInterface* gl, const char* ext) { |
| const GrGLubyte* glstr; |
| GR_GL_CALL_RET(gl, glstr, GetString(GR_GL_EXTENSIONS)); |
| return GrGLHasExtensionFromString(ext, (const char*) glstr); |
| } |
| |
| GrGLBinding GrGLGetBindingInUse(const GrGLInterface* gl) { |
| const GrGLubyte* v; |
| GR_GL_CALL_RET(gl, v, GetString(GR_GL_VERSION)); |
| return GrGLGetBindingInUseFromString((const char*) v); |
| } |
| |
| GrGLVersion GrGLGetVersion(const GrGLInterface* gl) { |
| const GrGLubyte* v; |
| GR_GL_CALL_RET(gl, v, GetString(GR_GL_VERSION)); |
| return GrGLGetVersionFromString((const char*) v); |
| } |
| |
| GrGLSLVersion GrGLGetGLSLVersion(const GrGLInterface* gl) { |
| const GrGLubyte* v; |
| GR_GL_CALL_RET(gl, v, GetString(GR_GL_SHADING_LANGUAGE_VERSION)); |
| return GrGLGetGLSLVersionFromString((const char*) v); |
| } |
| |
| GrGLInterface::GrGLInterface() { |
| fBindingsExported = kNone_GrGLBinding; |
| |
| fActiveTexture = NULL; |
| fAttachShader = NULL; |
| fBeginQuery = NULL; |
| fBindAttribLocation = NULL; |
| fBindBuffer = NULL; |
| fBindFragDataLocation = NULL; |
| fBindTexture = NULL; |
| fBlendColor = NULL; |
| fBlendFunc = NULL; |
| fBufferData = NULL; |
| fBufferSubData = NULL; |
| fClear = NULL; |
| fClearColor = NULL; |
| fClearStencil = NULL; |
| fColorMask = NULL; |
| fColorPointer = NULL; |
| fCompileShader = NULL; |
| fCompressedTexImage2D = NULL; |
| fCreateProgram = NULL; |
| fCreateShader = NULL; |
| fCullFace = NULL; |
| fDeleteBuffers = NULL; |
| fDeleteProgram = NULL; |
| fDeleteQueries = NULL; |
| fDeleteShader = NULL; |
| fDeleteTextures = NULL; |
| fDepthMask = NULL; |
| fDisable = NULL; |
| fDisableVertexAttribArray = NULL; |
| fDrawArrays = NULL; |
| fDrawBuffer = NULL; |
| fDrawBuffers = NULL; |
| fDrawElements = NULL; |
| fEndQuery = NULL; |
| fFinish = NULL; |
| fFlush = NULL; |
| fEnable = NULL; |
| fEnableVertexAttribArray = NULL; |
| fFrontFace = NULL; |
| fGenBuffers = NULL; |
| fGenQueries = NULL; |
| fGenTextures = NULL; |
| fGetBufferParameteriv = NULL; |
| fGetError = NULL; |
| fGetIntegerv = NULL; |
| fGetQueryiv = NULL; |
| fGetQueryObjecti64v = NULL; |
| fGetQueryObjectiv = NULL; |
| fGetQueryObjectui64v = NULL; |
| fGetQueryObjectuiv = NULL; |
| fGetProgramInfoLog = NULL; |
| fGetProgramiv = NULL; |
| fGetShaderInfoLog = NULL; |
| fGetShaderiv = NULL; |
| fGetString = NULL; |
| fGetTexLevelParameteriv = NULL; |
| fGetUniformLocation = NULL; |
| fLineWidth = NULL; |
| fLinkProgram = NULL; |
| fPixelStorei = NULL; |
| fQueryCounter = NULL; |
| fReadBuffer = NULL; |
| fReadPixels = NULL; |
| fScissor = NULL; |
| fShaderSource = NULL; |
| fStencilFunc = NULL; |
| fStencilFuncSeparate = NULL; |
| fStencilMask = NULL; |
| fStencilMaskSeparate = NULL; |
| fStencilOp = NULL; |
| fStencilOpSeparate = NULL; |
| fTexImage2D = NULL; |
| fTexParameteri = NULL; |
| fTexStorage2D = NULL; |
| fTexSubImage2D = NULL; |
| fUniform1f = NULL; |
| fUniform1i = NULL; |
| fUniform1fv = NULL; |
| fUniform1iv = NULL; |
| fUniform2f = NULL; |
| fUniform2i = NULL; |
| fUniform2fv = NULL; |
| fUniform2iv = NULL; |
| fUniform3f = NULL; |
| fUniform3i = NULL; |
| fUniform3fv = NULL; |
| fUniform3iv = NULL; |
| fUniform4f = NULL; |
| fUniform4i = NULL; |
| fUniform4fv = NULL; |
| fUniform4iv = NULL; |
| fUniformMatrix2fv = NULL; |
| fUniformMatrix3fv = NULL; |
| fUniformMatrix4fv = NULL; |
| fUseProgram = NULL; |
| fVertexAttrib4fv = NULL; |
| fVertexAttribPointer = NULL; |
| fViewport = NULL; |
| fBindFramebuffer = NULL; |
| fBindRenderbuffer = NULL; |
| fCheckFramebufferStatus = NULL; |
| fDeleteFramebuffers = NULL; |
| fDeleteRenderbuffers = NULL; |
| fFramebufferRenderbuffer = NULL; |
| fFramebufferTexture2D = NULL; |
| fGenFramebuffers = NULL; |
| fGenRenderbuffers = NULL; |
| fGetFramebufferAttachmentParameteriv = NULL; |
| fGetRenderbufferParameteriv = NULL; |
| fRenderbufferStorage = NULL; |
| fRenderbufferStorageMultisample = NULL; |
| fBlitFramebuffer = NULL; |
| fResolveMultisampleFramebuffer = NULL; |
| fMapBuffer = NULL; |
| fUnmapBuffer = NULL; |
| fBindFragDataLocationIndexed = NULL; |
| |
| #if GR_GL_PER_GL_FUNC_CALLBACK |
| fCallback = GrGLDefaultInterfaceCallback; |
| fCallbackData = 0; |
| #endif |
| } |
| |
| bool GrGLInterface::validate(GrGLBinding binding) const { |
| |
| // kNone must be 0 so that the check we're about to do can never succeed if |
| // binding == kNone. |
| GR_STATIC_ASSERT(kNone_GrGLBinding == 0); |
| |
| if (0 == (binding & fBindingsExported)) { |
| return false; |
| } |
| |
| // functions that are always required |
| if (NULL == fActiveTexture || |
| NULL == fAttachShader || |
| NULL == fBindAttribLocation || |
| NULL == fBindBuffer || |
| NULL == fBindTexture || |
| NULL == fBlendFunc || |
| NULL == fBufferData || |
| NULL == fBufferSubData || |
| NULL == fClear || |
| NULL == fClearColor || |
| NULL == fClearStencil || |
| NULL == fColorMask || |
| NULL == fCompileShader || |
| NULL == fCreateProgram || |
| NULL == fCreateShader || |
| NULL == fCullFace || |
| NULL == fDeleteBuffers || |
| NULL == fDeleteProgram || |
| NULL == fDeleteShader || |
| NULL == fDeleteTextures || |
| NULL == fDepthMask || |
| NULL == fDisable || |
| NULL == fDisableVertexAttribArray || |
| NULL == fDrawArrays || |
| NULL == fDrawElements || |
| NULL == fEnable || |
| NULL == fEnableVertexAttribArray || |
| NULL == fFrontFace || |
| NULL == fGenBuffers || |
| NULL == fGenTextures || |
| NULL == fGetBufferParameteriv || |
| NULL == fGetError || |
| NULL == fGetIntegerv || |
| NULL == fGetProgramInfoLog || |
| NULL == fGetProgramiv || |
| NULL == fGetShaderInfoLog || |
| NULL == fGetShaderiv || |
| NULL == fGetString || |
| NULL == fGetUniformLocation || |
| NULL == fLinkProgram || |
| NULL == fPixelStorei || |
| NULL == fReadPixels || |
| NULL == fScissor || |
| NULL == fShaderSource || |
| NULL == fStencilFunc || |
| NULL == fStencilMask || |
| NULL == fStencilOp || |
| NULL == fTexImage2D || |
| NULL == fTexParameteri || |
| NULL == fTexSubImage2D || |
| NULL == fUniform1f || |
| NULL == fUniform1i || |
| NULL == fUniform1fv || |
| NULL == fUniform1iv || |
| NULL == fUniform2f || |
| NULL == fUniform2i || |
| NULL == fUniform2fv || |
| NULL == fUniform2iv || |
| NULL == fUniform3f || |
| NULL == fUniform3i || |
| NULL == fUniform3fv || |
| NULL == fUniform3iv || |
| NULL == fUniform4f || |
| NULL == fUniform4i || |
| NULL == fUniform4fv || |
| NULL == fUniform4iv || |
| NULL == fUniformMatrix2fv || |
| NULL == fUniformMatrix3fv || |
| NULL == fUniformMatrix4fv || |
| NULL == fUseProgram || |
| NULL == fVertexAttrib4fv || |
| NULL == fVertexAttribPointer || |
| NULL == fViewport || |
| NULL == fBindFramebuffer || |
| NULL == fBindRenderbuffer || |
| NULL == fCheckFramebufferStatus || |
| NULL == fDeleteFramebuffers || |
| NULL == fDeleteRenderbuffers || |
| NULL == fFinish || |
| NULL == fFlush || |
| NULL == fFramebufferRenderbuffer || |
| NULL == fFramebufferTexture2D || |
| NULL == fGetFramebufferAttachmentParameteriv || |
| NULL == fGetRenderbufferParameteriv || |
| NULL == fGenFramebuffers || |
| NULL == fGenRenderbuffers || |
| NULL == fRenderbufferStorage) { |
| return false; |
| } |
| |
| const char* ext; |
| GrGLVersion glVer = GrGLGetVersion(this); |
| ext = (const char*)fGetString(GR_GL_EXTENSIONS); |
| |
| // Now check that baseline ES/Desktop fns not covered above are present |
| // and that we have fn pointers for any advertised extensions that we will |
| // try to use. |
| |
| // these functions are part of ES2, we assume they are available |
| // On the desktop we assume they are available if the extension |
| // is present or GL version is high enough. |
| if (kES2_GrGLBinding == binding) { |
| if (NULL == fBlendColor || |
| NULL == fStencilFuncSeparate || |
| NULL == fStencilMaskSeparate || |
| NULL == fStencilOpSeparate) { |
| return false; |
| } |
| } else if (kDesktop_GrGLBinding == binding) { |
| if (glVer >= GR_GL_VER(2,0)) { |
| if (NULL == fStencilFuncSeparate || |
| NULL == fStencilMaskSeparate || |
| NULL == fStencilOpSeparate) { |
| return false; |
| } |
| } |
| if (glVer >= GR_GL_VER(3,0) && NULL == fBindFragDataLocation) { |
| return false; |
| } |
| if (glVer >= GR_GL_VER(2,0) || |
| GrGLHasExtensionFromString("GL_ARB_draw_buffers", ext)) { |
| if (NULL == fDrawBuffers) { |
| return false; |
| } |
| } |
| if (glVer >= GR_GL_VER(1,4) || |
| GrGLHasExtensionFromString("GL_EXT_blend_color", ext)) { |
| if (NULL == fBlendColor) { |
| return false; |
| } |
| } |
| if (glVer >= GR_GL_VER(1,5) || |
| GrGLHasExtensionFromString("GL_ARB_occlusion_query", ext)) { |
| if (NULL == fGenQueries || |
| NULL == fDeleteQueries || |
| NULL == fBeginQuery || |
| NULL == fEndQuery || |
| NULL == fGetQueryiv || |
| NULL == fGetQueryObjectiv || |
| NULL == fGetQueryObjectuiv) { |
| return false; |
| } |
| } |
| if (glVer >= GR_GL_VER(3,3) || |
| GrGLHasExtensionFromString("GL_ARB_timer_query", ext) || |
| GrGLHasExtensionFromString("GL_EXT_timer_query", ext)) { |
| if (NULL == fGetQueryObjecti64v || |
| NULL == fGetQueryObjectui64v) { |
| return false; |
| } |
| } |
| if (glVer >= GR_GL_VER(3,3) || |
| GrGLHasExtensionFromString("GL_ARB_timer_query", ext)) { |
| if (NULL == fQueryCounter) { |
| return false; |
| } |
| } |
| } |
| |
| // optional function on desktop before 1.3 |
| if (kDesktop_GrGLBinding != binding || |
| (glVer >= GR_GL_VER(1,3) || |
| GrGLHasExtensionFromString("GL_ARB_texture_compression", ext))) { |
| if (NULL == fCompressedTexImage2D) { |
| return false; |
| } |
| } |
| |
| // part of desktop GL, but not ES |
| if (kDesktop_GrGLBinding == binding && |
| (NULL == fLineWidth || |
| NULL == fGetTexLevelParameteriv || |
| NULL == fDrawBuffer || |
| NULL == fReadBuffer)) { |
| return false; |
| } |
| |
| // GL_EXT_texture_storage is part of desktop 4.2 |
| // There is a desktop ARB extension and an ES+desktop EXT extension |
| if (kDesktop_GrGLBinding == binding) { |
| if (glVer >= GR_GL_VER(4,2) || |
| GrGLHasExtensionFromString("GL_ARB_texture_storage", ext) || |
| GrGLHasExtensionFromString("GL_EXT_texture_storage", ext)) { |
| if (NULL == fTexStorage2D) { |
| return false; |
| } |
| } |
| } else if (GrGLHasExtensionFromString("GL_EXT_texture_storage", ext)) { |
| if (NULL == fTexStorage2D) { |
| return false; |
| } |
| } |
| |
| // FBO MSAA |
| if (kDesktop_GrGLBinding == binding) { |
| // GL 3.0 and the ARB extension have multisample + blit |
| if (glVer >= GR_GL_VER(3,0) || GrGLHasExtensionFromString("GL_ARB_framebuffer_object", ext)) { |
| if (NULL == fRenderbufferStorageMultisample || |
| NULL == fBlitFramebuffer) { |
| return false; |
| } |
| } else { |
| if (GrGLHasExtensionFromString("GL_EXT_framebuffer_blit", ext) && |
| NULL == fBlitFramebuffer) { |
| return false; |
| } |
| if (GrGLHasExtensionFromString("GL_EXT_framebuffer_multisample", ext) && |
| NULL == fRenderbufferStorageMultisample) { |
| return false; |
| } |
| } |
| } else { |
| if (GrGLHasExtensionFromString("GL_CHROMIUM_framebuffer_multisample", ext)) { |
| if (NULL == fRenderbufferStorageMultisample || |
| NULL == fBlitFramebuffer) { |
| return false; |
| } |
| } |
| if (GrGLHasExtensionFromString("GL_APPLE_framebuffer_multisample", ext)) { |
| if (NULL == fRenderbufferStorageMultisample || |
| NULL == fResolveMultisampleFramebuffer) { |
| return false; |
| } |
| } |
| } |
| |
| // On ES buffer mapping is an extension. On Desktop |
| // buffer mapping was part of original VBO extension |
| // which we require. |
| if (kDesktop_GrGLBinding == binding || |
| GrGLHasExtensionFromString("GL_OES_mapbuffer", ext)) { |
| if (NULL == fMapBuffer || |
| NULL == fUnmapBuffer) { |
| return false; |
| } |
| } |
| |
| // Dual source blending |
| if (kDesktop_GrGLBinding == binding && |
| (glVer >= GR_GL_VER(3,3) || |
| GrGLHasExtensionFromString("GL_ARB_blend_func_extended", ext))) { |
| if (NULL == fBindFragDataLocationIndexed) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
