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
15namespace cc {
16
17SkPictureContentLayerUpdater::SkPictureContentLayerUpdater(
18    scoped_ptr<LayerPainter> painter,
19    RenderingStatsInstrumentation* stats_instrumentation,
20    int layer_id)
21    : ContentLayerUpdater(painter.Pass(), stats_instrumentation, layer_id) {}
22
23SkPictureContentLayerUpdater::~SkPictureContentLayerUpdater() {}
24
25void SkPictureContentLayerUpdater::PrepareToUpdate(
26    const gfx::Size& content_size,
27    const gfx::Rect& paint_rect,
28    const gfx::Size& tile_size,
29    float contents_width_scale,
30    float contents_height_scale) {
31  SkPictureRecorder recorder;
32  SkCanvas* canvas =
33      recorder.beginRecording(paint_rect.width(), paint_rect.height(), NULL, 0);
34  DCHECK_EQ(paint_rect.width(), canvas->getBaseLayerSize().width());
35  DCHECK_EQ(paint_rect.height(), canvas->getBaseLayerSize().height());
36  base::TimeTicks start_time =
37      rendering_stats_instrumentation_->StartRecording();
38  PaintContents(canvas,
39                content_size,
40                paint_rect,
41                contents_width_scale,
42                contents_height_scale);
43  base::TimeDelta duration =
44      rendering_stats_instrumentation_->EndRecording(start_time);
45  rendering_stats_instrumentation_->AddRecord(
46      duration, paint_rect.width() * paint_rect.height());
47  picture_ = skia::AdoptRef(recorder.endRecording());
48}
49
50void SkPictureContentLayerUpdater::DrawPicture(SkCanvas* canvas) {
51  TRACE_EVENT0("cc", "SkPictureContentLayerUpdater::DrawPicture");
52  if (picture_)
53    canvas->drawPicture(picture_.get());
54}
55
56}  // namespace cc
57