Implement the logic to kick off image decoding jobs for TileManager

cc/picture.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 "base/debug/trace_event.h"
 #include "cc/content_layer_client.h"
 #include "cc/picture.h"
 #include "cc/rendering_stats.h"
 #include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkData.h"
+#include "third_party/skia/include/utils/SkPictureUtils.h"
 #include "ui/gfx/rect_conversions.h"
 
 namespace cc {
 
 scoped_refptr<Picture> Picture::Create(gfx::Rect layer_rect) {
   return make_scoped_refptr(new Picture(layer_rect));
 }
 
 Picture::Picture(gfx::Rect layer_rect)
     : layer_rect_(layer_rect) {
@@ skipping 61 matching lines @@
 
 void Picture::Raster(SkCanvas* canvas) {
   TRACE_EVENT0("cc", "Picture::Raster");
   DCHECK(picture_);
   canvas->save();
   canvas->translate(layer_rect_.x(), layer_rect_.y());
   canvas->drawPicture(*picture_);
   canvas->restore();
 }
 
+std::vector<SkPixelRef*> Picture::GatherPixelRefs(const gfx::Rect& rect) {
+  DCHECK(picture_);
+  SkAutoDataUnref pixel_refs(SkPictureUtils::GatherPixelRefs(

[Alpha Left Google, 2012/12/05 20:24:28]

Not all pixelrefs are sklazypixelref. You might have to check for the url of
these pixelrefs, those are lazy have urls of "lazy".

Example:
https://code.google.com/searchframe#OAMlx_jo-ck/src/third_party/WebKit/Source...

[qinmin, 2012/12/07 05:06:28]

Good catch, fixed.

On 2012/12/05 20:24:28, Alpha wrote:

+      picture_.get(), SkRect::MakeXYWH(rect.x(),
+                                       rect.y(),
+                                       rect.width(),
+                                       rect.height())));
+  void* data = const_cast<void*>(pixel_refs->data());
+  SkPixelRef** refs = reinterpret_cast<SkPixelRef**>(data);
+  std::vector<SkPixelRef*> result(
+      refs, refs + pixel_refs->size() / sizeof(SkPixelRef*));
+  return result;
+}
+
 }  // namespace cc