Implement on demand quad rasterization for PicturePiles.

cc/resources/managed_tile_state.cc

 // Copyright 2013 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/resources/managed_tile_state.h"
 
 #include "cc/base/math_util.h"
 
 namespace cc {
 
 ManagedTileState::ManagedTileState()
     : can_use_gpu_memory(false),
       need_to_gather_pixel_refs(true),
       raster_state(IDLE_STATE),
       picture_pile_analyzed(false),
       gpu_memmgr_stats_bin(NEVER_BIN),
       resolution(NON_IDEAL_RESOLUTION),
       time_to_needed_in_seconds(std::numeric_limits<float>::infinity()),
       distance_to_visible_in_pixels(std::numeric_limits<float>::infinity()) {
   for (int i = 0; i < NUM_TREES; ++i) {
     tree_bin[i] = NEVER_BIN;
     bin[i] = NEVER_BIN;
   }
 }
 
 ManagedTileState::DrawingInfo::DrawingInfo()
-    : mode_(TEXTURE_MODE),
+    : mode_(RESOURCE_MODE),
       resource_is_being_initialized_(false),
       can_be_freed_(true),
       contents_swizzled_(false) {
 }
 
 ManagedTileState::DrawingInfo::~DrawingInfo() {
 }
 
 bool ManagedTileState::DrawingInfo::IsReadyToDraw() const {
   switch (mode_) {
-    case TEXTURE_MODE:
+    case RESOURCE_MODE:
       return resource_ &&
              !resource_is_being_initialized_ &&
              resource_->id();
     case SOLID_COLOR_MODE:
     case TRANSPARENT_MODE:
     case PICTURE_PILE_MODE:
       return true;
     default:
       NOTREACHED();
       return false;
@@ skipping 25 matching lines @@
   state->SetBoolean("is_picture_pile_analyzed", picture_pile_analyzed);
   state->SetBoolean("is_cheap_to_raster",
       picture_pile_analysis.is_cheap_to_raster);
   state->SetBoolean("is_transparent", picture_pile_analysis.is_transparent);
   state->SetBoolean("is_solid_color", picture_pile_analysis.is_solid_color);
   return state.PassAs<base::Value>();
 }
 
 }  // namespace cc