Raster display item lists via a visual rect RTree.

cc/playback/raster_source.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/playback/raster_source.h"
 
 #include <stddef.h>
 
 #include "base/trace_event/trace_event.h"
 #include "cc/base/region.h"
@@ skipping 179 matching lines @@
                                 const gfx::Rect& canvas_playback_rect,
                                 float contents_scale) const {
   canvas->translate(-canvas_bitmap_rect.x(), -canvas_bitmap_rect.y());
   gfx::Rect content_rect =
       gfx::ScaleToEnclosingRect(gfx::Rect(size_), contents_scale);
   content_rect.Intersect(canvas_playback_rect);
 
   canvas->clipRect(gfx::RectToSkRect(content_rect), SkRegion::kIntersect_Op);
 
   DCHECK(display_list_.get());
-  gfx::Rect canvas_target_playback_rect =
-      canvas_playback_rect - canvas_bitmap_rect.OffsetFromOrigin();
   int repeat_count = std::max(1, slow_down_raster_scale_factor_for_debug_);
   for (int i = 0; i < repeat_count; ++i) {
-    display_list_->Raster(canvas, callback, canvas_target_playback_rect,
+    display_list_->Raster(canvas, callback, canvas_playback_rect,
                           contents_scale);
   }
 }
 
 sk_sp<SkPicture> RasterSource::GetFlattenedPicture() {
   TRACE_EVENT0("cc", "RasterSource::GetFlattenedPicture");
 
   gfx::Rect display_list_rect(size_);
   SkPictureRecorder recorder;
   SkCanvas* canvas = recorder.beginRecording(display_list_rect.width(),
@@ skipping 97 matching lines @@
   DCHECK(image_decode_controller);
   image_decode_controller_ = image_decode_controller;
 }
 
 RasterSource::PlaybackSettings::PlaybackSettings()
     : playback_to_shared_canvas(false),
       skip_images(false),
       use_image_hijack_canvas(true) {}
 
 }  // namespace cc