cc: Add readback and forced draw states to the Scheduler

cc/output/direct_renderer.cc

 // Copyright 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 "cc/output/direct_renderer.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
@@ skipping 117 matching lines @@
 
 DirectRenderer::DirectRenderer(RendererClient* client,
                                OutputSurface* output_surface,
                                ResourceProvider* resource_provider)
     : Renderer(client),
       output_surface_(output_surface),
       resource_provider_(resource_provider) {}
 
 DirectRenderer::~DirectRenderer() {}
 
-bool DirectRenderer::CanReadPixels() const { return true; }
+bool DirectRenderer::CanReadPixels() const {
+  return !output_surface_->IsLost();

[brianderson, 2013/09/06 21:43:15]

This hopefully fixes the mac_rel failure when losing the context in the middle
of a readback by just failing the readback.

[danakj, 2013/09/06 21:45:57]

This is kinda abuse of this method. It's really meant like "is this renderer
capable of reading pixels", not checking on states. Can this be done outside the
renderer?

+}
 
 void DirectRenderer::SetEnlargePassTextureAmountForTesting(
     gfx::Vector2d amount) {
   enlarge_pass_texture_amount_ = amount;
 }
 
 void DirectRenderer::DecideRenderPassAllocationsForFrame(
     const RenderPassList& render_passes_in_draw_order) {
   if (!resource_provider_)
     return;
@@ skipping 264 matching lines @@
 gfx::Size DirectRenderer::RenderPassTextureSize(const RenderPass* render_pass) {
   return render_pass->output_rect.size();
 }
 
 // static
 GLenum DirectRenderer::RenderPassTextureFormat(const RenderPass* render_pass) {
   return GL_RGBA;
 }
 
 }  // namespace cc