Common GrGLInterface OpenGL setup function.

src/gpu/gl/GrGLAssembleInterface.cpp

 
 /*
- * Copyright 2011 Google Inc.
+ * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
-#include "gl/GrGLInterface.h"
-#include "../GrGLUtil.h"
+#include "GrGLAssembleInterface.h"
+#include "GrGLUtil.h"
 
-#include <GL/glx.h>
-#include <GL/gl.h>
-#include <GL/glext.h>
-#include <GL/glu.h>
+#define GET_PROC(F) functions->f ## F = (GrGL ## F ## Proc) get(ctx, "gl" #F)
+#define GET_PROC_SUFFIX(F, S) functions->f ## F = (GrGL ## F ## Proc) get(ctx, "gl" #F #S)
+#define GET_PROC_LOCAL(F) GrGL ## F ## Proc F = (GrGL ## F ## Proc) get(ctx, "gl" #F)
 
-#define GET_PROC(F) interface->fFunctions.f ## F = (GrGL ## F ## Proc) \
-        glXGetProcAddress(reinterpret_cast<const GLubyte*>("gl" #F));
-#define GET_PROC_SUFFIX(F, S) interface->fFunctions.f ## F = (GrGL ## F ## Proc) \
-        glXGetProcAddress(reinterpret_cast<const GLubyte*>("gl" #F #S));
+const GrGLInterface* GrGLAssembleGLInterface(void* ctx, GrGLGetProc get) {
+    GET_PROC_LOCAL(GetString);
+    GET_PROC_LOCAL(GetStringi);
+    GET_PROC_LOCAL(GetIntegerv);
 
-const GrGLInterface* GrGLCreateNativeInterface() {
-    if (NULL == glXGetCurrentContext()) {
+    // GetStringi may be NULL depending on the GL version.
+    if (NULL == GetString || NULL == GetIntegerv) {
         return NULL;
     }
 
-    const char* versionString = (const char*) glGetString(GL_VERSION);
+    const char* versionString = (const char*) GetString(GR_GL_VERSION);
     GrGLVersion glVer = GrGLGetVersionFromString(versionString);
 
-    // This may or may not succeed depending on the gl version.
-    GrGLGetStringiProc glGetStringi =
-        (GrGLGetStringiProc) glXGetProcAddress(reinterpret_cast<const GLubyte*>("glGetStringi"));
-
-    GrGLExtensions extensions;
-    if (!extensions.init(kGL_GrGLStandard, glGetString, glGetStringi, glGetIntegerv)) {
-        return NULL;
-    }
-
     if (glVer < GR_GL_VER(1,5)) {
         // We must have array and element_array buffer objects.
         return NULL;
     }
 
+    GrGLExtensions extensions;
+    if (!extensions.init(kGL_GrGLStandard, GetString, GetStringi, GetIntegerv)) {
+        return NULL;
+    }
+
     GrGLInterface* interface = SkNEW(GrGLInterface());
     GrGLInterface::Functions* functions = &interface->fFunctions;
 
-    functions->fActiveTexture = glActiveTexture;
+    GET_PROC(ActiveTexture);
     GET_PROC(AttachShader);
     GET_PROC(BindAttribLocation);
     GET_PROC(BindBuffer);
-    GET_PROC(BindFragDataLocation);
+    if (glVer >= GR_GL_VER(3,0)) {
+        GET_PROC(BindFragDataLocation);
+    }
     GET_PROC(BeginQuery);
-    functions->fBindTexture = glBindTexture;
-    functions->fBlendFunc = glBlendFunc;
+    GET_PROC(BindTexture);
+    GET_PROC(BlendFunc);
 
     if (glVer >= GR_GL_VER(1,4) ||
         extensions.has("GL_ARB_imaging") ||
         extensions.has("GL_EXT_blend_color")) {
         GET_PROC(BlendColor);
     }
 
     GET_PROC(BufferData);
     GET_PROC(BufferSubData);
-    functions->fClear = glClear;
-    functions->fClearColor = glClearColor;
-    functions->fClearStencil = glClearStencil;
-    functions->fColorMask = glColorMask;
+    GET_PROC(Clear);
+    GET_PROC(ClearColor);
+    GET_PROC(ClearStencil);
+    GET_PROC(ColorMask);
     GET_PROC(CompileShader);
-    functions->fCompressedTexImage2D = glCompressedTexImage2D;
-    functions->fCopyTexSubImage2D = glCopyTexSubImage2D;
+    GET_PROC(CompressedTexImage2D);
+    GET_PROC(CopyTexSubImage2D);
     GET_PROC(CreateProgram);
     GET_PROC(CreateShader);
-    functions->fCullFace = glCullFace;
+    GET_PROC(CullFace);
     GET_PROC(DeleteBuffers);
     GET_PROC(DeleteProgram);
     GET_PROC(DeleteQueries);
     GET_PROC(DeleteShader);
-    functions->fDeleteTextures = glDeleteTextures;
-    functions->fDepthMask = glDepthMask;
-    functions->fDisable = glDisable;
+    GET_PROC(DeleteTextures);
+    GET_PROC(DepthMask);
+    GET_PROC(Disable);
     GET_PROC(DisableVertexAttribArray);
-    functions->fDrawArrays = glDrawArrays;
-    functions->fDrawBuffer = glDrawBuffer;
+    GET_PROC(DrawArrays);
+    GET_PROC(DrawBuffer);
     GET_PROC(DrawBuffers);
-    functions->fDrawElements = glDrawElements;
-    functions->fEnable = glEnable;
+    GET_PROC(DrawElements);
+    GET_PROC(Enable);
     GET_PROC(EnableVertexAttribArray);
     GET_PROC(EndQuery);
-    functions->fFinish = glFinish;
-    functions->fFlush = glFlush;
-    functions->fFrontFace = glFrontFace;
+    GET_PROC(Finish);
+    GET_PROC(Flush);
+    GET_PROC(FrontFace);
     GET_PROC(GenBuffers);
     GET_PROC(GenerateMipmap);
     GET_PROC(GetBufferParameteriv);
-    functions->fGetError = glGetError;
-    functions->fGetIntegerv = glGetIntegerv;
+    GET_PROC(GetError);
+    GET_PROC(GetIntegerv);
     GET_PROC(GetQueryObjectiv);
     GET_PROC(GetQueryObjectuiv);
     if (glVer >= GR_GL_VER(3,3) || extensions.has("GL_ARB_timer_query")) {
         GET_PROC(GetQueryObjecti64v);
         GET_PROC(GetQueryObjectui64v);
         GET_PROC(QueryCounter);
     } else if (extensions.has("GL_EXT_timer_query")) {
         GET_PROC_SUFFIX(GetQueryObjecti64v, EXT);
         GET_PROC_SUFFIX(GetQueryObjectui64v, EXT);
     }
     GET_PROC(GetQueryiv);
     GET_PROC(GetProgramInfoLog);
     GET_PROC(GetProgramiv);
     GET_PROC(GetShaderInfoLog);
     GET_PROC(GetShaderiv);
-    functions->fGetString = glGetString;
+    GET_PROC(GetString);
     GET_PROC(GetStringi);
-    functions->fGetTexLevelParameteriv = glGetTexLevelParameteriv;
+    GET_PROC(GetTexLevelParameteriv);
     GET_PROC(GenQueries);
-    functions->fGenTextures = glGenTextures;
+    GET_PROC(GenTextures);
     GET_PROC(GetUniformLocation);
-    functions->fLineWidth = glLineWidth;
+    GET_PROC(LineWidth);
     GET_PROC(LinkProgram);
     GET_PROC(MapBuffer);
     if (extensions.has("GL_EXT_direct_state_access")) {
         GET_PROC_SUFFIX(MatrixLoadf, EXT);
         GET_PROC_SUFFIX(MatrixLoadIdentity, EXT);
     }
-    functions->fPixelStorei = glPixelStorei;
-    functions->fReadBuffer = glReadBuffer;
-    functions->fReadPixels = glReadPixels;
-    functions->fScissor = glScissor;
+    GET_PROC(PixelStorei);
+    GET_PROC(ReadBuffer);
+    GET_PROC(ReadPixels);
+    GET_PROC(Scissor);
     GET_PROC(ShaderSource);
-    functions->fStencilFunc = glStencilFunc;
+    GET_PROC(StencilFunc);
     GET_PROC(StencilFuncSeparate);
-    functions->fStencilMask = glStencilMask;
+    GET_PROC(StencilMask);
     GET_PROC(StencilMaskSeparate);
-    functions->fStencilOp = glStencilOp;
+    GET_PROC(StencilOp);
     GET_PROC(StencilOpSeparate);
-    functions->fTexImage2D = glTexImage2D;
-    functions->fTexParameteri = glTexParameteri;
-    functions->fTexParameteriv = glTexParameteriv;
+    GET_PROC(TexImage2D);
+    GET_PROC(TexParameteri);
+    GET_PROC(TexParameteriv);
     if (glVer >= GR_GL_VER(4,2) || extensions.has("GL_ARB_texture_storage")) {
         GET_PROC(TexStorage2D);
     } else if (extensions.has("GL_EXT_texture_storage")) {
         GET_PROC_SUFFIX(TexStorage2D, EXT);
     }
-    functions->fTexSubImage2D = glTexSubImage2D;
+    GET_PROC(TexSubImage2D);
     GET_PROC(Uniform1f);
     GET_PROC(Uniform1i);
     GET_PROC(Uniform1fv);
     GET_PROC(Uniform1iv);
     GET_PROC(Uniform2f);
     GET_PROC(Uniform2i);
     GET_PROC(Uniform2fv);
     GET_PROC(Uniform2iv);
     GET_PROC(Uniform3f);
     GET_PROC(Uniform3i);
     GET_PROC(Uniform3fv);
     GET_PROC(Uniform3iv);
     GET_PROC(Uniform4f);
     GET_PROC(Uniform4i);
     GET_PROC(Uniform4fv);
     GET_PROC(Uniform4iv);
     GET_PROC(UniformMatrix2fv);
     GET_PROC(UniformMatrix3fv);
     GET_PROC(UniformMatrix4fv);
     GET_PROC(UnmapBuffer);
     GET_PROC(UseProgram);
     GET_PROC(VertexAttrib4fv);
     GET_PROC(VertexAttribPointer);
-    functions->fViewport = glViewport;
+    GET_PROC(Viewport);
     GET_PROC(BindFragDataLocationIndexed);
 
     if (glVer >= GR_GL_VER(3,0) || extensions.has("GL_ARB_vertex_array_object")) {
         // no ARB suffix for GL_ARB_vertex_array_object
         GET_PROC(BindVertexArray);
         GET_PROC(GenVertexArrays);
         GET_PROC(DeleteVertexArrays);
     }
 
     // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since
@@ skipping 103 matching lines @@
         GET_PROC(InvalidateSubFramebuffer);
         GET_PROC(InvalidateTexImage);
         GET_PROC(InvalidateTexSubImage);
     }
 
     interface->fStandard = kGL_GrGLStandard;
     interface->fExtensions.swap(&extensions);
 
     return interface;
 }