Use a singleton 1x1 offscreen surface for all TextureImageTransportSurface instances.

content/common/gpu/texture_image_transport_surface.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 "content/common/gpu/texture_image_transport_surface.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 70 matching lines @@
     texture_manager->SetParameter(
         texture.info, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     texture_manager->SetParameter(
         texture.info, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     texture_manager->SetParameter(
         texture.info, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     texture_manager->SetParameter(
         texture.info, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
   }
 
-  surface_ = gfx::GLSurface::CreateOffscreenGLSurface(false, gfx::Size(1, 1));
-  if (!surface_.get())
+  surface_ = manager->AllocMakeCurrentSurface();
+  if (!surface_)
     return false;
 
   if (!helper_->Initialize())
     return false;
 
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kUIPrioritizeInGpuProcess))
     helper_->SetPreemptByCounter(parent_channel->MessagesPendingCount());
 
   return true;
 }
 
 void TextureImageTransportSurface::Destroy() {
   if (parent_stub_) {
     parent_stub_->decoder()->MakeCurrent();
     ReleaseParentStub();
   }
 
-  if (surface_.get()) {
-    surface_->Destroy();
+  if (surface_) {
+    helper_->manager()->ReleaseMakeCurrentSurface();
     surface_ = NULL;
   }
 
   helper_->Destroy();
 }
 
 bool TextureImageTransportSurface::Resize(const gfx::Size&) {
   return true;
 }
 
@@ skipping 72 matching lines @@
       textures_[front()].sent_to_client = false;
     }
   }
 }
 
 void* TextureImageTransportSurface::GetShareHandle() {
   return GetHandle();
 }
 
 void* TextureImageTransportSurface::GetDisplay() {
-  return surface_.get() ? surface_->GetDisplay() : NULL;
+  return surface_ ? surface_->GetDisplay() : NULL;
 }
 
 void* TextureImageTransportSurface::GetConfig() {
-  return surface_.get() ? surface_->GetConfig() : NULL;
+  return surface_ ? surface_->GetConfig() : NULL;
 }
 
 void TextureImageTransportSurface::OnResize(gfx::Size size) {
   CreateBackTexture(size);
 }
 
 void TextureImageTransportSurface::OnWillDestroyStub(
     GpuCommandBufferStub* stub) {
   if (stub == parent_stub_) {
     ReleaseParentStub();
@@ skipping 117 matching lines @@
 
 gfx::Size TextureImageTransportSurface::GetSize() {
   gfx::Size size = textures_[back()].size;
 
   // OSMesa expects a non-zero size.
   return gfx::Size(size.width() == 0 ? 1 : size.width(),
                    size.height() == 0 ? 1 : size.height());
 }
 
 void* TextureImageTransportSurface::GetHandle() {
-  return surface_.get() ? surface_->GetHandle() : NULL;
+  return surface_ ? surface_->GetHandle() : NULL;
 }
 
 unsigned TextureImageTransportSurface::GetFormat() {
   return surface_ ? surface_->GetFormat() : 0;
 }
 
 void TextureImageTransportSurface::OnSetFrontSurfaceIsProtected(
     bool is_protected, uint32 protection_state_id) {
   protection_state_id_ = protection_state_id;
   if (frontbuffer_is_protected_ == is_protected)
@@ skipping 157 matching lines @@
     Texture& texture = textures_[i];
     texture.info = NULL;
     if (!texture.sent_to_client)
       continue;
     GpuHostMsg_AcceleratedSurfaceRelease_Params params;
     params.identifier = texture.client_id;
     helper_->SendAcceleratedSurfaceRelease(params);
   }
   parent_stub_ = NULL;
 }