Allow the renderer process to map textures from one context into another.

gpu/command_buffer/service/texture_manager.cc

 // Copyright (c) 2011 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 "base/bits.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/GLES2/gles2_command_buffer.h"
@@ skipping 50 matching lines @@
 }
 
 TextureManager::~TextureManager() {
   DCHECK(texture_infos_.empty());
 }
 
 void TextureManager::Destroy(bool have_context) {
   while (!texture_infos_.empty()) {
     if (have_context) {
       TextureInfo* info = texture_infos_.begin()->second;
-      if (!info->IsDeleted() && info->owned_) {
+      if (!info->IsDeleted() && info->owner_.get() == this) {
         GLuint service_id = info->service_id();
         glDeleteTextures(1, &service_id);
         info->MarkAsDeleted();
       }
     }
     texture_infos_.erase(texture_infos_.begin());
   }
   if (have_context) {
     GLuint ids[] = {
       black_2d_texture_id_,
@@ skipping 467 matching lines @@
   bool result = info->MarkMipmapsGenerated(feature_info);
   if (!info->CanRender(feature_info)) {
     ++num_unrenderable_textures_;
   }
   return result;
 }
 
 TextureManager::TextureInfo* TextureManager::CreateTextureInfo(
     const FeatureInfo* feature_info,
     GLuint client_id, GLuint service_id) {
-  TextureInfo::Ref info(new TextureInfo(service_id));
-  std::pair<TextureInfoMap::iterator, bool> result =
-      texture_infos_.insert(std::make_pair(client_id, info));
-  DCHECK(result.second);
-  if (!info->CanRender(feature_info)) {
-    ++num_unrenderable_textures_;
-  }
-  return info.get();
+  TextureInfo* texture_info = new TextureInfo(service_id);
+  texture_info->owner_ = AsWeakPtr();
+  AddTextureInfo(feature_info, client_id, texture_info);
+  return texture_info;
 }
 
 TextureManager::TextureInfo* TextureManager::GetTextureInfo(
     GLuint client_id) {
   TextureInfoMap::iterator it = texture_infos_.find(client_id);
   return it != texture_infos_.end() ? it->second : NULL;
 }
 
+void TextureManager::AddTextureInfo(
+    const FeatureInfo* feature_info,
+    GLuint client_id, TextureInfo* texture_info) {
+  std::pair<TextureInfoMap::iterator, bool> result =
+      texture_infos_.insert(std::make_pair(client_id, texture_info));
+  DCHECK(result.second);
+  if (!texture_info->CanRender(feature_info)) {
+    ++num_unrenderable_textures_;
+  }
+}
+
 void TextureManager::RemoveTextureInfo(
     const FeatureInfo* feature_info, GLuint client_id) {
   TextureInfoMap::iterator it = texture_infos_.find(client_id);
   if (it != texture_infos_.end()) {
     TextureInfo* info = it->second;
-    if (!info->CanRender(feature_info)) {
+    if (!info->CanRender(feature_info))
       --num_unrenderable_textures_;
-    }
-    info->MarkAsDeleted();
+    if (info->owner_.get() == this)
+      info->MarkAsDeleted();
     texture_infos_.erase(it);
   }
 }
 
 bool TextureManager::GetClientId(GLuint service_id, GLuint* client_id) const {
   // This doesn't need to be fast. It's only used during slow queries.
   for (TextureInfoMap::const_iterator it = texture_infos_.begin();
        it != texture_infos_.end(); ++it) {
     if (it->second->service_id() == service_id) {
       *client_id = it->first;
       return true;
     }
   }
   return false;
 }
 
 }  // namespace gles2
 }  // namespace gpu