Add R_8 GPU memory buffers format.

gpu/command_buffer/service/feature_info.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/feature_info.h"
 
 #include <set>
 
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 1052 matching lines @@
   if ((gl_version_info_->is_es3 || gl_version_info_->is_desktop_core_profile ||
        extensions.Contains("GL_EXT_texture_rg") ||
        extensions.Contains("GL_ARB_texture_rg")) &&
       IsGL_REDSupportedOnFBOs()) {
     feature_flags_.ext_texture_rg = true;
     AddExtensionString("GL_EXT_texture_rg");
 
     validators_.texture_format.AddValue(GL_RED_EXT);
     validators_.texture_format.AddValue(GL_RG_EXT);
     validators_.texture_internal_format.AddValue(GL_RED_EXT);
+    validators_.texture_internal_format.AddValue(GL_R8_EXT);
     validators_.texture_internal_format.AddValue(GL_RG_EXT);
+    validators_.texture_internal_format.AddValue(GL_RG8_EXT);
     validators_.read_pixel_format.AddValue(GL_RED_EXT);
     validators_.read_pixel_format.AddValue(GL_RG_EXT);
     validators_.render_buffer_format.AddValue(GL_R8_EXT);
     validators_.render_buffer_format.AddValue(GL_RG8_EXT);
 
     texture_format_validators_[GL_RED_EXT].AddValue(GL_UNSIGNED_BYTE);
     texture_format_validators_[GL_RG_EXT].AddValue(GL_UNSIGNED_BYTE);
 
     if (enable_texture_float) {
       texture_format_validators_[GL_RED_EXT].AddValue(GL_FLOAT);
@@ skipping 45 matching lines @@
   if (pos == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu