http://codereview.appspot.com/4373057/
git-svn-id: http://skia.googlecode.com/svn/trunk@1135 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/unix/GrGLDefaultInterface_unix.cpp b/gpu/src/unix/GrGLDefaultInterface_unix.cpp
new file mode 100644
index 0000000..6d6873d
--- /dev/null
+++ b/gpu/src/unix/GrGLDefaultInterface_unix.cpp
@@ -0,0 +1,170 @@
+/*
+ Copyright 2011 Google Inc.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+#include "GrGLInterface.h"
+
+#include <GL/glx.h>
+#include <GL/gl.h>
+#include <GL/glext.h>
+#include <GL/glu.h>
+
+#define GR_GL_GET_PROC(F) gDefaultInterface.f ## F = (GrGLInterface::GrGL ## F ## Proc) \
+ glXGetProcAddress(reinterpret_cast<const GLubyte*>("gl" #F));
+#define GR_GL_GET_PROC_SUFFIX(F, S) gDefaultInterface.f ## F = (GrGLInterface::GrGL ## F ## Proc) \
+ glXGetProcAddress(reinterpret_cast<const GLubyte*>("gl" #F #S));
+
+void GrGLSetDefaultGLInterface() {
+ static GrGLInterface gDefaultInterface;
+ static bool gDefaultInterfaceInit;
+ if (!gDefaultInterfaceInit && NULL != glXGetCurrentContext()) {
+ int major, minor;
+ const char* versionString = (const char*) glGetString(GL_VERSION);
+ const char* extString = (const char*) glGetString(GL_EXTENSIONS);
+ gl_version_from_string(&major, &minor, versionString);
+
+ if (major == 1 && minor < 5) {
+ // We must have array and element_array buffer objects.
+ return;
+ }
+
+ gDefaultInterface.fActiveTexture = glActiveTexture;
+ GR_GL_GET_PROC(AttachShader);
+ GR_GL_GET_PROC(BindAttribLocation);
+ GR_GL_GET_PROC(BindBuffer);
+ gDefaultInterface.fBindTexture = glBindTexture;
+ gDefaultInterface.fBlendColor = glBlendColor;
+ gDefaultInterface.fBlendFunc = glBlendFunc;
+ GR_GL_GET_PROC(BufferData);
+ GR_GL_GET_PROC(BufferSubData);
+ gDefaultInterface.fClear = glClear;
+ gDefaultInterface.fClearColor = glClearColor;
+ gDefaultInterface.fClearStencil = glClearStencil;
+ gDefaultInterface.fClientActiveTexture = glClientActiveTexture;
+ gDefaultInterface.fColorMask = glColorMask;
+ gDefaultInterface.fColorPointer = glColorPointer;
+ gDefaultInterface.fColor4ub = glColor4ub;
+ GR_GL_GET_PROC(CompileShader);
+ gDefaultInterface.fCompressedTexImage2D = glCompressedTexImage2D;
+ GR_GL_GET_PROC(CreateProgram);
+ GR_GL_GET_PROC(CreateShader);
+ gDefaultInterface.fCullFace = glCullFace;
+ GR_GL_GET_PROC(DeleteBuffers);
+ GR_GL_GET_PROC(DeleteProgram);
+ GR_GL_GET_PROC(DeleteShader);
+ gDefaultInterface.fDeleteTextures = glDeleteTextures;
+ gDefaultInterface.fDepthMask = glDepthMask;
+ gDefaultInterface.fDisable = glDisable;
+ gDefaultInterface.fDisableClientState = glDisableClientState;
+ GR_GL_GET_PROC(DisableVertexAttribArray);
+ gDefaultInterface.fDrawArrays = glDrawArrays;
+ gDefaultInterface.fDrawElements = glDrawElements;
+ gDefaultInterface.fEnable = glEnable;
+ gDefaultInterface.fEnableClientState = glEnableClientState;
+ GR_GL_GET_PROC(EnableVertexAttribArray);
+ gDefaultInterface.fFrontFace = glFrontFace;
+ GR_GL_GET_PROC(GenBuffers);
+ GR_GL_GET_PROC(GetBufferParameteriv);
+ gDefaultInterface.fGetError = glGetError;
+ gDefaultInterface.fGetIntegerv = glGetIntegerv;
+ GR_GL_GET_PROC(GetProgramInfoLog);
+ GR_GL_GET_PROC(GetProgramiv);
+ GR_GL_GET_PROC(GetShaderInfoLog);
+ GR_GL_GET_PROC(GetShaderiv);
+ gDefaultInterface.fGetString = glGetString;
+ gDefaultInterface.fGenTextures = glGenTextures;
+ GR_GL_GET_PROC(GetUniformLocation);
+ gDefaultInterface.fLineWidth = glLineWidth;
+ GR_GL_GET_PROC(LinkProgram);
+ gDefaultInterface.fLoadMatrixf = glLoadMatrixf;
+ GR_GL_GET_PROC(MapBuffer);
+ gDefaultInterface.fMatrixMode = glMatrixMode;
+ gDefaultInterface.fPointSize = glPointSize;
+ gDefaultInterface.fPixelStorei = glPixelStorei;
+ gDefaultInterface.fReadPixels = glReadPixels;
+ gDefaultInterface.fScissor = glScissor;
+ gDefaultInterface.fShadeModel = glShadeModel;
+ GR_GL_GET_PROC(ShaderSource);
+ gDefaultInterface.fStencilFunc = glStencilFunc;
+ GR_GL_GET_PROC(StencilFuncSeparate);
+ gDefaultInterface.fStencilMask = glStencilMask;
+ GR_GL_GET_PROC(StencilMaskSeparate);
+ gDefaultInterface.fStencilOp = glStencilOp;
+ GR_GL_GET_PROC(StencilOpSeparate);
+ gDefaultInterface.fTexCoordPointer = glTexCoordPointer;
+ gDefaultInterface.fTexEnvi = glTexEnvi;
+ // mac uses GLenum for internalFormat param (non-standard)
+ // amounts to int vs. uint.
+ gDefaultInterface.fTexImage2D =
+ (GrGLInterface::GrGLTexImage2DProc)glTexImage2D;
+ gDefaultInterface.fTexParameteri = glTexParameteri;
+ gDefaultInterface.fTexSubImage2D = glTexSubImage2D;
+ GR_GL_GET_PROC(Uniform1fv);
+ GR_GL_GET_PROC(Uniform1i);
+ GR_GL_GET_PROC(Uniform4fv);
+ GR_GL_GET_PROC(UniformMatrix3fv);
+ GR_GL_GET_PROC(UnmapBuffer);
+ GR_GL_GET_PROC(UseProgram);
+ GR_GL_GET_PROC(VertexAttrib4fv);
+ GR_GL_GET_PROC(VertexAttribPointer);
+ gDefaultInterface.fVertexPointer = glVertexPointer;
+ gDefaultInterface.fViewport = glViewport;
+
+ // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since
+ // GL_ARB_framebuffer_object doesn't use ARB suffix.)
+ if (major >= 3 || has_gl_extension("GL_ARB_framebuffer_object")) {
+ GR_GL_GET_PROC(GenFramebuffers);
+ GR_GL_GET_PROC(BindFramebuffer);
+ GR_GL_GET_PROC(FramebufferTexture2D);
+ GR_GL_GET_PROC(CheckFramebufferStatus);
+ GR_GL_GET_PROC(DeleteFramebuffers);
+ GR_GL_GET_PROC(RenderbufferStorage);
+ GR_GL_GET_PROC(GenRenderbuffers);
+ GR_GL_GET_PROC(DeleteRenderbuffers);
+ GR_GL_GET_PROC(FramebufferRenderbuffer);
+ GR_GL_GET_PROC(BindRenderbuffer);
+ GR_GL_GET_PROC(RenderbufferStorageMultisample);
+ GR_GL_GET_PROC(BlitFramebuffer);
+ } else if (has_gl_extension_from_string("GL_EXT_framebuffer_object",
+ extString)) {
+ GR_GL_GET_PROC_SUFFIX(GenFramebuffers, EXT);
+ GR_GL_GET_PROC_SUFFIX(BindFramebuffer, EXT);
+ GR_GL_GET_PROC_SUFFIX(FramebufferTexture2D, EXT);
+ GR_GL_GET_PROC_SUFFIX(CheckFramebufferStatus, EXT);
+ GR_GL_GET_PROC_SUFFIX(DeleteFramebuffers, EXT);
+ GR_GL_GET_PROC_SUFFIX(RenderbufferStorage, EXT);
+ GR_GL_GET_PROC_SUFFIX(GenRenderbuffers, EXT);
+ GR_GL_GET_PROC_SUFFIX(DeleteRenderbuffers, EXT);
+ GR_GL_GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT);
+ GR_GL_GET_PROC_SUFFIX(BindRenderbuffer, EXT);
+ if (has_gl_extension_from_string("GL_EXT_framebuffer_multisample",
+ extString)) {
+ GR_GL_GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT);
+ }
+ if (has_gl_extension_from_string("GL_EXT_framebuffer_blit",
+ extString)) {
+ GR_GL_GET_PROC_SUFFIX(BlitFramebuffer, EXT);
+ }
+ } else {
+ // we must have FBOs
+ return;
+ }
+ gDefaultInterface.fBindingsExported = kDesktop_GrGLBinding;
+
+ gDefaultInterfaceInit = true;
+ }
+ if (gDefaultInterfaceInit)
+ GrGLSetGLInterface(&gDefaultInterface);
+}