cc/resources/skpicture_content_layer_updater.cc

   1 // Copyright 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/resources/skpicture_content_layer_updater.h"
   6
   7 #include "base/debug/trace_event.h"
   8 #include "cc/debug/rendering_stats_instrumentation.h"
   9 #include "cc/resources/layer_painter.h"
  10 #include "cc/resources/prioritized_resource.h"
  11 #include "cc/resources/resource_update_queue.h"
  12 #include "third_party/skia/include/core/SkCanvas.h"
  13
  14 namespace cc {
  15
  16 SkPictureContentLayerUpdater::SkPictureContentLayerUpdater(
  17     scoped_ptr<LayerPainter> painter,
  18     RenderingStatsInstrumentation* stats_instrumentation,
  19     int layer_id)
  20     : ContentLayerUpdater(painter.Pass(), stats_instrumentation, layer_id) {}
  21
  22 SkPictureContentLayerUpdater::~SkPictureContentLayerUpdater() {}
  23
  24 void SkPictureContentLayerUpdater::PrepareToUpdate(
  25     gfx::Rect content_rect,
  26     gfx::Size,
  27     float contents_width_scale,
  28     float contents_height_scale,
  29     gfx::Rect* resulting_opaque_rect) {
  30   SkCanvas* canvas =
  31       picture_.beginRecording(content_rect.width(), content_rect.height());
  32   base::TimeTicks start_time =
  33       rendering_stats_instrumentation_->StartRecording();
  34   PaintContents(canvas,
  35                 content_rect,
  36                 contents_width_scale,
  37                 contents_height_scale,
  38                 resulting_opaque_rect);
  39   base::TimeDelta duration =
  40       rendering_stats_instrumentation_->EndRecording(start_time);
  41   rendering_stats_instrumentation_->AddRecord(
  42       duration, content_rect.width() * content_rect.height());
  43   picture_.endRecording();
  44 }
  45
  46 void SkPictureContentLayerUpdater::DrawPicture(SkCanvas* canvas) {
  47   TRACE_EVENT0("cc", "SkPictureContentLayerUpdater::DrawPicture");
  48   canvas->drawPicture(picture_);
  49 }
  50
  51 }  // namespace cc