cc: Add tiling raster tile iterators.

cc/resources/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/resources/tile_manager.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 
@@ skipping 577 matching lines @@
                  &memory_allocated_bytes,
                  &memory_used_bytes);
   requirements->SetInteger("memory_required_bytes", memory_required_bytes);
   requirements->SetInteger("memory_nice_to_have_bytes",
                            memory_nice_to_have_bytes);
   requirements->SetInteger("memory_allocated_bytes", memory_allocated_bytes);
   requirements->SetInteger("memory_used_bytes", memory_used_bytes);
   return requirements.PassAs<base::Value>();
 }
 
-RasterMode TileManager::DetermineRasterMode(const Tile* tile) const {
-  DCHECK(tile);
-  DCHECK(tile->picture_pile());
-
-  const ManagedTileState& mts = tile->managed_state();
-  RasterMode current_mode = mts.raster_mode;
-
-  RasterMode raster_mode = HIGH_QUALITY_RASTER_MODE;
-  if (tile->managed_state().resolution == LOW_RESOLUTION)
-    raster_mode = LOW_QUALITY_RASTER_MODE;
-  else if (tile->can_use_lcd_text())
-    raster_mode = HIGH_QUALITY_RASTER_MODE;
-  else if (mts.tile_versions[current_mode].has_text_ ||
-           !mts.tile_versions[current_mode].IsReadyToDraw())
-    raster_mode = HIGH_QUALITY_NO_LCD_RASTER_MODE;
-
-  return std::min(raster_mode, current_mode);
-}
-
 void TileManager::AssignGpuMemoryToTiles(
     PrioritizedTileSet* tiles,
     TileVector* tiles_that_need_to_be_rasterized) {
   TRACE_EVENT0("cc", "TileManager::AssignGpuMemoryToTiles");
 
   // Maintain the list of released resources that can potentially be re-used
   // or deleted.
   // If this operation becomes expensive too, only do this after some
   // resource(s) was returned. Note that in that case, one also need to
   // invalidate when releasing some resource from the pool.
@@ skipping 39 matching lines @@
   size_t max_raster_bytes = max_raster_usage_bytes_ / 2;
   size_t raster_bytes = 0;
 
   unsigned schedule_priority = 1u;
   for (PrioritizedTileSet::Iterator it(tiles, true); it; ++it) {
     Tile* tile = *it;
     ManagedTileState& mts = tile->managed_state();
 
     mts.scheduled_priority = schedule_priority++;
 
-    mts.raster_mode = DetermineRasterMode(tile);
+    mts.raster_mode = tile->DetermineOverallRasterMode();
 
     ManagedTileState::TileVersion& tile_version =
         mts.tile_versions[mts.raster_mode];
 
     // If this tile doesn't need a resource, then nothing to do.
     if (!tile_version.requires_resource())
       continue;
 
     // If the tile is not needed, free it up.
     if (mts.bin == NEVER_BIN) {
@@ skipping 354 matching lines @@
                                                          flags));
   DCHECK(tiles_.find(tile->id()) == tiles_.end());
 
   tiles_[tile->id()] = tile;
   used_layer_counts_[tile->layer_id()]++;
   prioritized_tiles_dirty_ = true;
   return tile;
 }
 
 }  // namespace cc