Gpu Image Decode Controller

cc/raster/tile_task_runner.cc

 // Copyright 2014 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/raster/tile_task_runner.h"
 #include "cc/resources/platform_color.h"
 
 namespace cc {
 
 TileTask::TileTask() : did_schedule_(false), did_complete_(false) {
@@ skipping 28 matching lines @@
   did_complete_ = true;
 }
 
 bool TileTask::HasCompleted() const {
   return did_complete_;
 }
 
 ImageDecodeTask::ImageDecodeTask() {
 }
 
+ImageDecodeTask::ImageDecodeTask(scoped_refptr<ImageDecodeTask> dependency)
+    : dependency_(std::move(dependency)) {}
+
 ImageDecodeTask::~ImageDecodeTask() {
 }
 
+bool ImageDecodeTask::SupportsConcurrentExecution() const {
+  return true;
+}
+
 RasterTask::RasterTask(ImageDecodeTask::Vector* dependencies) {
   dependencies_.swap(*dependencies);
 }
 
 RasterTask::~RasterTask() {
 }
 
 bool TileTaskRunner::ResourceFormatRequiresSwizzle(ResourceFormat format) {
   switch (format) {
     case RGBA_8888:
     case BGRA_8888:
       // Initialize resource using the preferred PlatformColor component
       // order and swizzle in the shader instead of in software.
       return !PlatformColor::SameComponentOrder(format);
     case RGBA_4444:
     case ETC1:
     case ALPHA_8:
     case LUMINANCE_8:
     case RGB_565:
     case RED_8:
     case LUMINANCE_F16:
       return false;
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace cc