michael@0: 
michael@0: /*
michael@0:  * Copyright 2011 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "gl/GrGLInterface.h"
michael@0: #include "../GrGLUtil.h"
michael@0: 
michael@0: #include <GL/glx.h>
michael@0: #include <GL/gl.h>
michael@0: #include <GL/glext.h>
michael@0: #include <GL/glu.h>
michael@0: 
michael@0: #define GR_GL_GET_PROC(F) interface->fFunctions.f ## F = (GrGL ## F ## Proc) \
michael@0:         glXGetProcAddress(reinterpret_cast<const GLubyte*>("gl" #F));
michael@0: #define GR_GL_GET_PROC_SUFFIX(F, S) interface->fFunctions.f ## F = (GrGL ## F ## Proc) \
michael@0:         glXGetProcAddress(reinterpret_cast<const GLubyte*>("gl" #F #S));
michael@0: 
michael@0: const GrGLInterface* GrGLCreateNativeInterface() {
michael@0:     if (NULL != glXGetCurrentContext()) {
michael@0: 
michael@0:         const char* versionString = (const char*) glGetString(GL_VERSION);
michael@0:         GrGLVersion glVer = GrGLGetVersionFromString(versionString);
michael@0: 
michael@0:         // This may or may not succeed depending on the gl version.
michael@0:         GrGLGetStringiProc glGetStringi =
michael@0:             (GrGLGetStringiProc) glXGetProcAddress(reinterpret_cast<const GLubyte*>("glGetStringi"));
michael@0: 
michael@0:         GrGLExtensions extensions;
michael@0:         if (!extensions.init(kGL_GrGLStandard, glGetString, glGetStringi, glGetIntegerv)) {
michael@0:             return NULL;
michael@0:         }
michael@0: 
michael@0:         if (glVer < GR_GL_VER(1,5)) {
michael@0:             // We must have array and element_array buffer objects.
michael@0:             return NULL;
michael@0:         }
michael@0: 
michael@0:         GrGLInterface* interface = SkNEW(GrGLInterface());
michael@0:         GrGLInterface::Functions* functions = &interface->fFunctions;
michael@0: 
michael@0:         functions->fActiveTexture = glActiveTexture;
michael@0:         GR_GL_GET_PROC(AttachShader);
michael@0:         GR_GL_GET_PROC(BindAttribLocation);
michael@0:         GR_GL_GET_PROC(BindBuffer);
michael@0:         GR_GL_GET_PROC(BindFragDataLocation);
michael@0:         GR_GL_GET_PROC(BeginQuery);
michael@0:         functions->fBindTexture = glBindTexture;
michael@0:         functions->fBlendFunc = glBlendFunc;
michael@0: 
michael@0:         if (glVer >= GR_GL_VER(1,4) ||
michael@0:             extensions.has("GL_ARB_imaging") ||
michael@0:             extensions.has("GL_EXT_blend_color")) {
michael@0:             GR_GL_GET_PROC(BlendColor);
michael@0:         }
michael@0: 
michael@0:         GR_GL_GET_PROC(BufferData);
michael@0:         GR_GL_GET_PROC(BufferSubData);
michael@0:         functions->fClear = glClear;
michael@0:         functions->fClearColor = glClearColor;
michael@0:         functions->fClearStencil = glClearStencil;
michael@0:         functions->fColorMask = glColorMask;
michael@0:         GR_GL_GET_PROC(CompileShader);
michael@0:         functions->fCompressedTexImage2D = glCompressedTexImage2D;
michael@0:         functions->fCopyTexSubImage2D = glCopyTexSubImage2D;
michael@0:         GR_GL_GET_PROC(CreateProgram);
michael@0:         GR_GL_GET_PROC(CreateShader);
michael@0:         functions->fCullFace = glCullFace;
michael@0:         GR_GL_GET_PROC(DeleteBuffers);
michael@0:         GR_GL_GET_PROC(DeleteProgram);
michael@0:         GR_GL_GET_PROC(DeleteQueries);
michael@0:         GR_GL_GET_PROC(DeleteShader);
michael@0:         functions->fDeleteTextures = glDeleteTextures;
michael@0:         functions->fDepthMask = glDepthMask;
michael@0:         functions->fDisable = glDisable;
michael@0:         GR_GL_GET_PROC(DisableVertexAttribArray);
michael@0:         functions->fDrawArrays = glDrawArrays;
michael@0:         functions->fDrawBuffer = glDrawBuffer;
michael@0:         GR_GL_GET_PROC(DrawBuffers);
michael@0:         functions->fDrawElements = glDrawElements;
michael@0:         functions->fEnable = glEnable;
michael@0:         GR_GL_GET_PROC(EnableVertexAttribArray);
michael@0:         GR_GL_GET_PROC(EndQuery);
michael@0:         functions->fFinish = glFinish;
michael@0:         functions->fFlush = glFlush;
michael@0:         functions->fFrontFace = glFrontFace;
michael@0:         GR_GL_GET_PROC(GenBuffers);
michael@0:         GR_GL_GET_PROC(GenerateMipmap);
michael@0:         GR_GL_GET_PROC(GetBufferParameteriv);
michael@0:         functions->fGetError = glGetError;
michael@0:         functions->fGetIntegerv = glGetIntegerv;
michael@0:         GR_GL_GET_PROC(GetQueryObjectiv);
michael@0:         GR_GL_GET_PROC(GetQueryObjectuiv);
michael@0:         if (glVer >= GR_GL_VER(3,3) || extensions.has("GL_ARB_timer_query")) {
michael@0:             GR_GL_GET_PROC(GetQueryObjecti64v);
michael@0:             GR_GL_GET_PROC(GetQueryObjectui64v);
michael@0:             GR_GL_GET_PROC(QueryCounter);
michael@0:         } else if (extensions.has("GL_EXT_timer_query")) {
michael@0:             GR_GL_GET_PROC_SUFFIX(GetQueryObjecti64v, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetQueryObjectui64v, EXT);
michael@0:         }
michael@0:         GR_GL_GET_PROC(GetQueryiv);
michael@0:         GR_GL_GET_PROC(GetProgramInfoLog);
michael@0:         GR_GL_GET_PROC(GetProgramiv);
michael@0:         GR_GL_GET_PROC(GetShaderInfoLog);
michael@0:         GR_GL_GET_PROC(GetShaderiv);
michael@0:         functions->fGetString = glGetString;
michael@0:         GR_GL_GET_PROC(GetStringi);
michael@0:         functions->fGetTexLevelParameteriv = glGetTexLevelParameteriv;
michael@0:         GR_GL_GET_PROC(GenQueries);
michael@0:         functions->fGenTextures = glGenTextures;
michael@0:         GR_GL_GET_PROC(GetUniformLocation);
michael@0:         functions->fLineWidth = glLineWidth;
michael@0:         GR_GL_GET_PROC(LinkProgram);
michael@0:         GR_GL_GET_PROC(MapBuffer);
michael@0:         functions->fPixelStorei = glPixelStorei;
michael@0:         functions->fReadBuffer = glReadBuffer;
michael@0:         functions->fReadPixels = glReadPixels;
michael@0:         functions->fScissor = glScissor;
michael@0:         GR_GL_GET_PROC(ShaderSource);
michael@0:         functions->fStencilFunc = glStencilFunc;
michael@0:         GR_GL_GET_PROC(StencilFuncSeparate);
michael@0:         functions->fStencilMask = glStencilMask;
michael@0:         GR_GL_GET_PROC(StencilMaskSeparate);
michael@0:         functions->fStencilOp = glStencilOp;
michael@0:         GR_GL_GET_PROC(StencilOpSeparate);
michael@0:         functions->fTexImage2D = glTexImage2D;
michael@0:         functions->fTexGenfv = glTexGenfv;
michael@0:         functions->fTexGeni = glTexGeni;
michael@0:         functions->fTexParameteri = glTexParameteri;
michael@0:         functions->fTexParameteriv = glTexParameteriv;
michael@0:         if (glVer >= GR_GL_VER(4,2) || extensions.has("GL_ARB_texture_storage")) {
michael@0:             GR_GL_GET_PROC(TexStorage2D);
michael@0:         } else if (extensions.has("GL_EXT_texture_storage")) {
michael@0:             GR_GL_GET_PROC_SUFFIX(TexStorage2D, EXT);
michael@0:         }
michael@0:         functions->fTexSubImage2D = glTexSubImage2D;
michael@0:         GR_GL_GET_PROC(Uniform1f);
michael@0:         GR_GL_GET_PROC(Uniform1i);
michael@0:         GR_GL_GET_PROC(Uniform1fv);
michael@0:         GR_GL_GET_PROC(Uniform1iv);
michael@0:         GR_GL_GET_PROC(Uniform2f);
michael@0:         GR_GL_GET_PROC(Uniform2i);
michael@0:         GR_GL_GET_PROC(Uniform2fv);
michael@0:         GR_GL_GET_PROC(Uniform2iv);
michael@0:         GR_GL_GET_PROC(Uniform3f);
michael@0:         GR_GL_GET_PROC(Uniform3i);
michael@0:         GR_GL_GET_PROC(Uniform3fv);
michael@0:         GR_GL_GET_PROC(Uniform3iv);
michael@0:         GR_GL_GET_PROC(Uniform4f);
michael@0:         GR_GL_GET_PROC(Uniform4i);
michael@0:         GR_GL_GET_PROC(Uniform4fv);
michael@0:         GR_GL_GET_PROC(Uniform4iv);
michael@0:         GR_GL_GET_PROC(UniformMatrix2fv);
michael@0:         GR_GL_GET_PROC(UniformMatrix3fv);
michael@0:         GR_GL_GET_PROC(UniformMatrix4fv);
michael@0:         GR_GL_GET_PROC(UnmapBuffer);
michael@0:         GR_GL_GET_PROC(UseProgram);
michael@0:         GR_GL_GET_PROC(VertexAttrib4fv);
michael@0:         GR_GL_GET_PROC(VertexAttribPointer);
michael@0:         functions->fViewport = glViewport;
michael@0:         GR_GL_GET_PROC(BindFragDataLocationIndexed);
michael@0: 
michael@0:         if (glVer >= GR_GL_VER(3,0) || extensions.has("GL_ARB_vertex_array_object")) {
michael@0:             // no ARB suffix for GL_ARB_vertex_array_object
michael@0:             GR_GL_GET_PROC(BindVertexArray);
michael@0:             GR_GL_GET_PROC(GenVertexArrays);
michael@0:             GR_GL_GET_PROC(DeleteVertexArrays);
michael@0:         }
michael@0: 
michael@0:         // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since
michael@0:         // GL_ARB_framebuffer_object doesn't use ARB suffix.)
michael@0:         if (glVer >= GR_GL_VER(3,0) || extensions.has("GL_ARB_framebuffer_object")) {
michael@0:             GR_GL_GET_PROC(GenFramebuffers);
michael@0:             GR_GL_GET_PROC(GetFramebufferAttachmentParameteriv);
michael@0:             GR_GL_GET_PROC(GetRenderbufferParameteriv);
michael@0:             GR_GL_GET_PROC(BindFramebuffer);
michael@0:             GR_GL_GET_PROC(FramebufferTexture2D);
michael@0:             GR_GL_GET_PROC(CheckFramebufferStatus);
michael@0:             GR_GL_GET_PROC(DeleteFramebuffers);
michael@0:             GR_GL_GET_PROC(RenderbufferStorage);
michael@0:             GR_GL_GET_PROC(GenRenderbuffers);
michael@0:             GR_GL_GET_PROC(DeleteRenderbuffers);
michael@0:             GR_GL_GET_PROC(FramebufferRenderbuffer);
michael@0:             GR_GL_GET_PROC(BindRenderbuffer);
michael@0:             GR_GL_GET_PROC(RenderbufferStorageMultisample);
michael@0:             GR_GL_GET_PROC(BlitFramebuffer);
michael@0:         } else if (extensions.has("GL_EXT_framebuffer_object")) {
michael@0:             GR_GL_GET_PROC_SUFFIX(GenFramebuffers, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetFramebufferAttachmentParameteriv, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetRenderbufferParameteriv, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(BindFramebuffer, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(FramebufferTexture2D, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(CheckFramebufferStatus, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(DeleteFramebuffers, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(RenderbufferStorage, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(GenRenderbuffers, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(DeleteRenderbuffers, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(BindRenderbuffer, EXT);
michael@0:             if (extensions.has("GL_EXT_framebuffer_multisample")) {
michael@0:                 GR_GL_GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT);
michael@0:             }
michael@0:             if (extensions.has("GL_EXT_framebuffer_blit")) {
michael@0:                 GR_GL_GET_PROC_SUFFIX(BlitFramebuffer, EXT);
michael@0:             }
michael@0:         } else {
michael@0:             // we must have FBOs
michael@0:             delete interface;
michael@0:             return NULL;
michael@0:         }
michael@0: 
michael@0:         GR_GL_GET_PROC(LoadIdentity);
michael@0:         GR_GL_GET_PROC(LoadMatrixf);
michael@0:         GR_GL_GET_PROC(MatrixMode);
michael@0: 
michael@0:         if (extensions.has("GL_NV_path_rendering")) {
michael@0:             GR_GL_GET_PROC_SUFFIX(PathCommands, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathCoords, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathSubCommands, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathSubCoords, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathString, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathGlyphs, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathGlyphRange, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(WeightPaths, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(CopyPath, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(InterpolatePaths, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(TransformPath, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathParameteriv, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathParameteri, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathParameterfv, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathParameterf, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathDashArray, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GenPaths, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(DeletePaths, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(IsPath, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathStencilFunc, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathStencilDepthOffset, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(StencilFillPath, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(StencilStrokePath, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(StencilFillPathInstanced, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(StencilStrokePathInstanced, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathCoverDepthFunc, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathColorGen, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathTexGen, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PathFogGen, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(CoverFillPath, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(CoverStrokePath, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(CoverFillPathInstanced, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(CoverStrokePathInstanced, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathParameteriv, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathParameterfv, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathCommands, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathCoords, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathDashArray, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathMetrics, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathMetricRange, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathSpacing, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathColorGeniv, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathColorGenfv, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathTexGeniv, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathTexGenfv, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(IsPointInFillPath, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(IsPointInStrokePath, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(GetPathLength, NV);
michael@0:             GR_GL_GET_PROC_SUFFIX(PointAlongPath, NV);
michael@0:         }
michael@0: 
michael@0:         if (extensions.has("GL_EXT_debug_marker")) {
michael@0:             GR_GL_GET_PROC_SUFFIX(InsertEventMarker, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(PushGroupMarker, EXT);
michael@0:             GR_GL_GET_PROC_SUFFIX(PopGroupMarker, EXT);
michael@0:         }
michael@0: 
michael@0:         interface->fStandard = kGL_GrGLStandard;
michael@0:         interface->fExtensions.swap(&extensions);
michael@0: 
michael@0:         return interface;
michael@0:     } else {
michael@0:         return NULL;
michael@0:     }
michael@0: }