cc: Check for completed raster tasks at interval.

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 159 matching lines @@
   return state.PassAs<base::Value>();
 }
 
 TileManager::TileManager(
     TileManagerClient* client,
     ResourceProvider* resource_provider,
     size_t num_raster_threads,
     bool use_cheapness_estimator)
     : client_(client),
       resource_pool_(ResourcePool::Create(resource_provider)),
-      raster_worker_pool_(RasterWorkerPool::Create(num_raster_threads)),
+      raster_worker_pool_(RasterWorkerPool::Create(this, num_raster_threads)),
       manage_tiles_pending_(false),
       manage_tiles_call_count_(0),
       bytes_pending_set_pixels_(0),
+      has_performed_uploads_since_last_flush_(false),
       ever_exceeded_memory_budget_(false),
       record_rendering_stats_(false),
       use_cheapness_estimator_(use_cheapness_estimator) {
   for (int i = 0; i < NUM_STATES; ++i) {
     for (int j = 0; j < NUM_TREES; ++j) {
       for (int k = 0; k < NUM_BINS; ++k)
         raster_state_count_[i][j][k] = 0;
     }
   }
 }
@@ skipping 337 matching lines @@
       case IDLE_STATE:
         break;
       default:
         NOTREACHED();
     }
   }
 
   return false;
 }
 
+void TileManager::DidFinishDispatchingWorkerPoolCompletionCallbacks() {
+  // If a flush is needed, do it now before starting to dispatch more tasks.
+  if (has_performed_uploads_since_last_flush_) {
+    resource_pool_->resource_provider()->shallowFlushIfSupported();
+    has_performed_uploads_since_last_flush_ = false;
+  }
+
+  DispatchMoreTasks();
+}
+
 void TileManager::AssignGpuMemoryToTiles() {
   TRACE_EVENT0("cc", "TileManager::AssignGpuMemoryToTiles");
   size_t unreleasable_bytes = 0;
 
   // Now give memory out to the tiles until we're out, and build
   // the needs-to-be-rasterized queue.
   tiles_that_need_to_be_rasterized_.clear();
 
   // Reset the image decoding list so that we don't mess up with tile
   // priorities. Tiles will be added to the image decoding list again
@@ skipping 190 matching lines @@
     std::list<skia::LazyPixelRef*>& pixel_refs =
         (*it)->managed_state().pending_pixel_refs;
     for (std::list<skia::LazyPixelRef*>::iterator pixel_it =
         pixel_refs.begin(); pixel_it != pixel_refs.end(); ++pixel_it) {
       if (pixel_ref_id == (*pixel_it)->getGenerationID()) {
         pixel_refs.erase(pixel_it);
         break;
       }
     }
   }
-
-  DispatchMoreTasks();
 }
 
 scoped_ptr<ResourcePool::Resource> TileManager::PrepareTileForRaster(
     Tile* tile) {
   ManagedTileState& managed_tile_state = tile->managed_state();
   DCHECK(managed_tile_state.can_use_gpu_memory);
   scoped_ptr<ResourcePool::Resource> resource =
       resource_pool_->AcquireResource(tile->tile_size_.size(), tile->format_);
   resource_pool_->resource_provider()->acquirePixelBuffer(resource->id());
 
@@ skipping 67 matching lines @@
     // The component order may be bgra if we're uploading bgra pixels to rgba
     // texture. Mark contents as swizzled if image component order is
     // different than texture format.
     managed_tile_state.contents_swizzled =
         !PlatformColor::sameComponentOrder(tile->format_);
 
     // Tile resources can't be freed until upload has completed.
     managed_tile_state.can_be_freed = false;
 
     resource_pool_->resource_provider()->beginSetPixels(resource->id());
-    resource_pool_->resource_provider()->shallowFlushIfSupported();
+    has_performed_uploads_since_last_flush_ = true;
+
     managed_tile_state.resource = resource.Pass();
 
     bytes_pending_set_pixels_ += tile->bytes_consumed_if_allocated();
     DidTileRasterStateChange(tile, SET_PIXELS_STATE);
     tiles_with_pending_set_pixels_.push(tile);
   } else {
     resource_pool_->resource_provider()->releasePixelBuffer(resource->id());
     resource_pool_->ReleaseResource(resource.Pass());
     managed_tile_state.resource_is_being_initialized = false;
     DidTileRasterStateChange(tile, IDLE_STATE);
   }
 }
 
 void TileManager::OnRasterTaskCompleted(
     scoped_refptr<Tile> tile,
     scoped_ptr<ResourcePool::Resource> resource,
     int manage_tiles_call_count_when_dispatched) {
   OnRasterCompleted(tile, resource.Pass(),
                     manage_tiles_call_count_when_dispatched);
-  DispatchMoreTasks();
 }
 
 void TileManager::DidFinishTileInitialization(Tile* tile) {
   ManagedTileState& managed_tile_state = tile->managed_state();
   DCHECK(managed_tile_state.resource);
   managed_tile_state.resource_is_being_initialized = false;
   managed_tile_state.can_be_freed = true;
 }
 
 void TileManager::DidTileRasterStateChange(Tile* tile, TileRasterState state) {
@@ skipping 99 matching lines @@
     decode_begin_time = base::TimeTicks::Now();
   pixel_ref->Decode();
   if (stats) {
     stats->totalDeferredImageDecodeCount++;
     stats->totalDeferredImageDecodeTime +=
         base::TimeTicks::Now() - decode_begin_time;
   }
 }
 
 }  // namespace cc