Add GL_CHROMIUM_screen_space_antialiasing to support alternative AA

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <algorithm>
 #include <cmath>
@@ skipping 1042 matching lines @@
   void DoProduceTextureCHROMIUM(GLenum target, const GLbyte* key);
   void DoProduceTextureDirectCHROMIUM(GLuint texture, GLenum target,
       const GLbyte* key);
   void ProduceTextureRef(std::string func_name, TextureRef* texture_ref,
       GLenum target, const GLbyte* data);
 
   void EnsureTextureForClientId(GLenum target, GLuint client_id);
   void DoConsumeTextureCHROMIUM(GLenum target, const GLbyte* key);
   void DoCreateAndConsumeTextureCHROMIUM(GLenum target, const GLbyte* key,
     GLuint client_id);
+  void DoApplyScreenSpaceAntialiasingCHROMIUM();
 
   bool DoIsValuebufferCHROMIUM(GLuint client_id);
   void DoBindValueBufferCHROMIUM(GLenum target, GLuint valuebuffer);
   void DoSubscribeValueCHROMIUM(GLenum target, GLenum subscription);
   void DoPopulateSubscribedValuesCHROMIUM(GLenum target);
   void DoUniformValueBufferCHROMIUM(GLint location,
                                     GLenum target,
                                     GLenum subscription);
 
   void DoBindTexImage2DCHROMIUM(
@@ skipping 12767 matching lines @@
     EnsureTextureForClientId(target, client_id);
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glCreateAndConsumeTextureCHROMIUM", "invalid target");
     return;
   }
 
   texture_ref = texture_manager()->Consume(client_id, texture);
 }
 
+void GLES2DecoderImpl::DoApplyScreenSpaceAntialiasingCHROMIUM() {
+  // Apply CMAA(Conservative Morphological Anti-Aliasing) algorithm to the
+  // color attachments of currently bound draw framebuffer.
+  // Reference GL_INTEL_framebuffer_CMAA for details.
+  glApplyFramebufferAttachmentCMAAINTEL();
+}
+
 bool GLES2DecoderImpl::DoIsValuebufferCHROMIUM(GLuint client_id) {
   const Valuebuffer* valuebuffer = GetValuebuffer(client_id);
   return valuebuffer && valuebuffer->IsValid();
 }
 
 void GLES2DecoderImpl::DoBindValueBufferCHROMIUM(GLenum target,
                                                  GLuint client_id) {
   Valuebuffer* valuebuffer = NULL;
   if (client_id != 0) {
     valuebuffer = GetValuebuffer(client_id);
@@ skipping 1001 matching lines @@
   return error::kNoError;
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu