WebGL: GL_RGB emulation for IOSurface backed textures. [For reference only]

gpu/command_buffer/service/texture_manager.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/texture_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1603 matching lines @@
 
 void Texture::ApplyFormatWorkarounds(FeatureInfo* feature_info) {
   if (feature_info->gl_version_info().is_desktop_core_profile) {
     if (static_cast<size_t>(base_level_) >= face_infos_[0].level_infos.size())
       return;
     const Texture::LevelInfo& info = face_infos_[0].level_infos[base_level_];
     SetCompatibilitySwizzle(GetCompatibilitySwizzle(info.format));
   }
 }
 
+bool Texture::EmulatingRGB() {
+  for (const FaceInfo& face_info : face_infos_) {
+    for (const LevelInfo& level_info : face_info.level_infos) {
+      if (level_info.image && level_info.image->EmulatingRGB())
+        return true;
+    }
+  }
+  return false;
+}
+
 TextureRef::TextureRef(TextureManager* manager,
                        GLuint client_id,
                        Texture* texture)
     : manager_(manager),
       texture_(texture),
       client_id_(client_id),
       num_observers_(0) {
   DCHECK(manager_);
   DCHECK(texture_);
   texture_->AddTextureRef(this);
@@ skipping 1500 matching lines @@
 uint32_t TextureManager::GetServiceIdGeneration() const {
   return current_service_id_generation_;
 }
 
 void TextureManager::IncrementServiceIdGeneration() {
   current_service_id_generation_++;
 }
 
 }  // namespace gles2
 }  // namespace gpu