Implement on demand quad rasterization for PicturePiles.

cc/tile_manager.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/tile_manager.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
@@ skipping 697 matching lines @@
         use_color_estimator_;
     managed_tile_state.picture_pile_analysis.is_transparent &=
         use_color_estimator_;
     managed_tile_state.picture_pile_analyzed = true;
 
     if (managed_tile_state.picture_pile_analysis.is_solid_color)
       tile->drawing_info().set_solid_color(
         managed_tile_state.picture_pile_analysis.solid_color);
     else if (managed_tile_state.picture_pile_analysis.is_transparent)
       tile->drawing_info().set_transparent();
+    else if (!managed_tile_state.can_use_gpu_memory)

[vmpstr, 2013/03/13 21:03:08]

I think the only way to get to this code path is if can_use_gpu_memory is true
(hence this else if will never be true). I think the more appropriate spot for
this check would be in AssignGpuMemory. One of the conditions there says
something along the lines of "if we want to raster, but we're out of memory"

[Leandro Graciá Gil, 2013/03/19 17:30:07]

Done.

+      tile->drawing_info().set_picture_pile();
   }
 }
 
 void TileManager::GatherPixelRefsForTile(Tile* tile) {
   TRACE_EVENT0("cc", "TileManager::GatherPixelRefsForTile");
   ManagedTileState& managed_tile_state = tile->managed_state();
   if (managed_tile_state.need_to_gather_pixel_refs) {
     base::TimeTicks gather_begin_time;
     if (record_rendering_stats_)
       gather_begin_time = base::TimeTicks::HighResNow();
@@ skipping 362 matching lines @@
     decode_begin_time = base::TimeTicks::HighResNow();
   pixel_ref->Decode();
   if (stats) {
     stats->totalDeferredImageDecodeCount++;
     stats->totalDeferredImageDecodeTime +=
         base::TimeTicks::HighResNow() - decode_begin_time;
   }
 }
 
 }  // namespace cc