Add EXT_color_buffer_half_float extension support in GPU commandbuffer service.

gpu/command_buffer/common/gles2_cmd_utils.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.
 
 // This file is here so other GLES2 related files can have a common set of
 // includes where appropriate.
 
 #include <stdio.h>
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 214 matching lines @@
     case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
       return 1;
     case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL:
       return 1;
     case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE:
       return 1;
     // -- glGetFramebufferAttachmentParameteriv with
     //    GL_EXT_multisampled_render_to_texture
     case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_SAMPLES_EXT:
       return 1;
+    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE_EXT:
+      return 1;
 
     // -- glGetProgramiv
     case GL_DELETE_STATUS:
       return 1;
     case GL_LINK_STATUS:
       return 1;
     case GL_VALIDATE_STATUS:
       return 1;
     case GL_INFO_LOG_LENGTH:
       return 1;
@@ skipping 217 matching lines @@
     case GL_RGB5_A1:
     case GL_DEPTH_COMPONENT16:
       return 2;
     case GL_RGB:
     case GL_RGBA:
     case GL_DEPTH24_STENCIL8_OES:
     case GL_RGB8_OES:
     case GL_RGBA8_OES:
     case GL_DEPTH_COMPONENT24_OES:
       return 4;
+    case GL_RGB16F_EXT:
+      return 6;
+    case GL_RGBA16F_EXT:
+      return 8;
+    case GL_RGB32F_EXT:
+      return 12;
+    case GL_RGBA32F_EXT:
+      return 16;
     default:
       return 0;
   }
 }
 
 uint32 GLES2Util::GetGLDataTypeSizeForUniforms(int type) {
   switch (type) {
     case GL_FLOAT:
       return sizeof(GLfloat);              // NOLINT
     case GL_FLOAT_VEC2:
@@ skipping 322 matching lines @@
   }
 
   return true;
 }
 
 #include "gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu