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 #include "third_party/skia/include/core/SkPictureRecorder.h"
  14
  15 namespace cc {
  16
  17 SkPictureContentLayerUpdater::SkPictureContentLayerUpdater(
  18     scoped_ptr<LayerPainter> painter,
  19     RenderingStatsInstrumentation* stats_instrumentation,
  20     int layer_id)
  21     : ContentLayerUpdater(painter.Pass(), stats_instrumentation, layer_id) {}
  22
  23 SkPictureContentLayerUpdater::~SkPictureContentLayerUpdater() {}
  24
  25 void SkPictureContentLayerUpdater::PrepareToUpdate(
  26     const gfx::Rect& content_rect,
  27     const gfx::Size&,
  28     float contents_width_scale,
  29     float contents_height_scale,
  30     gfx::Rect* resulting_opaque_rect) {
  31   SkPictureRecorder recorder;
  32   SkCanvas* canvas = recorder.beginRecording(
  33       content_rect.width(), content_rect.height(), NULL, 0);
  34   DCHECK_EQ(content_rect.width(), canvas->getBaseLayerSize().width());
  35   DCHECK_EQ(content_rect.height(), canvas->getBaseLayerSize().height());
  36   base::TimeTicks start_time =
  37       rendering_stats_instrumentation_->StartRecording();
  38   PaintContents(canvas,
  39                 content_rect,
  40                 contents_width_scale,
  41                 contents_height_scale,
  42                 resulting_opaque_rect);
  43   base::TimeDelta duration =
  44       rendering_stats_instrumentation_->EndRecording(start_time);
  45   rendering_stats_instrumentation_->AddRecord(
  46       duration, content_rect.width() * content_rect.height());
  47   picture_ = skia::AdoptRef(recorder.endRecording());
  48 }
  49
  50 void SkPictureContentLayerUpdater::DrawPicture(SkCanvas* canvas) {
  51   TRACE_EVENT0("cc", "SkPictureContentLayerUpdater::DrawPicture");
  52   if (picture_)
  53     canvas->drawPicture(picture_.get());
  54 }
  55
  56 }  // namespace cc