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/bitmap_content_layer_updater.h"
6
7#include "cc/debug/devtools_instrumentation.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.h"
12#include "cc/resources/resource_update_queue.h"
13#include "skia/ext/platform_canvas.h"
14
15namespace cc {
16
17BitmapContentLayerUpdater::Resource::Resource(
18    BitmapContentLayerUpdater* updater,
19    scoped_ptr<PrioritizedResource> texture)
20    : LayerUpdater::Resource(texture.Pass()), updater_(updater) {}
21
22BitmapContentLayerUpdater::Resource::~Resource() {}
23
24void BitmapContentLayerUpdater::Resource::Update(
25    ResourceUpdateQueue* queue,
26    const gfx::Rect& source_rect,
27    const gfx::Vector2d& dest_offset,
28    bool partial_update) {
29  updater_->UpdateTexture(
30      queue, texture(), source_rect, dest_offset, partial_update);
31}
32
33scoped_refptr<BitmapContentLayerUpdater> BitmapContentLayerUpdater::Create(
34    scoped_ptr<LayerPainter> painter,
35    RenderingStatsInstrumentation* stats_instrumentation,
36    int layer_id) {
37  return make_scoped_refptr(
38      new BitmapContentLayerUpdater(painter.Pass(),
39                                    stats_instrumentation,
40                                    layer_id));
41}
42
43BitmapContentLayerUpdater::BitmapContentLayerUpdater(
44    scoped_ptr<LayerPainter> painter,
45    RenderingStatsInstrumentation* stats_instrumentation,
46    int layer_id)
47    : ContentLayerUpdater(painter.Pass(), stats_instrumentation, layer_id) {}
48
49BitmapContentLayerUpdater::~BitmapContentLayerUpdater() {}
50
51scoped_ptr<LayerUpdater::Resource> BitmapContentLayerUpdater::CreateResource(
52    PrioritizedResourceManager* manager) {
53  return scoped_ptr<LayerUpdater::Resource>(
54      new Resource(this, PrioritizedResource::Create(manager)));
55}
56
57void BitmapContentLayerUpdater::PrepareToUpdate(const gfx::Size& content_size,
58                                                const gfx::Rect& paint_rect,
59                                                const gfx::Size& tile_size,
60                                                float contents_width_scale,
61                                                float contents_height_scale) {
62  if (canvas_size_ != paint_rect.size()) {
63    devtools_instrumentation::ScopedLayerTask paint_setup(
64        devtools_instrumentation::kPaintSetup, layer_id_);
65    canvas_size_ = paint_rect.size();
66    bitmap_backing_.allocN32Pixels(
67        canvas_size_.width(), canvas_size_.height(), layer_is_opaque_);
68    // TODO(danak): Remove when skia does the check for us: crbug.com/360384
69    canvas_ = skia::AdoptRef(new SkCanvas(bitmap_backing_));
70    DCHECK_EQ(paint_rect.width(), canvas_->getBaseLayerSize().width());
71    DCHECK_EQ(paint_rect.height(), canvas_->getBaseLayerSize().height());
72  }
73
74  base::TimeTicks start_time =
75      rendering_stats_instrumentation_->StartRecording();
76  PaintContents(canvas_.get(),
77                content_size,
78                paint_rect,
79                contents_width_scale,
80                contents_height_scale);
81  base::TimeDelta duration =
82      rendering_stats_instrumentation_->EndRecording(start_time);
83  rendering_stats_instrumentation_->AddPaint(
84      duration, paint_rect.width() * paint_rect.height());
85}
86
87void BitmapContentLayerUpdater::UpdateTexture(ResourceUpdateQueue* queue,
88                                              PrioritizedResource* texture,
89                                              const gfx::Rect& source_rect,
90                                              const gfx::Vector2d& dest_offset,
91                                              bool partial_update) {
92  CHECK(canvas_);
93  ResourceUpdate upload = ResourceUpdate::Create(
94      texture, &bitmap_backing_, paint_rect(), source_rect, dest_offset);
95  if (partial_update)
96    queue->AppendPartialUpload(upload);
97  else
98    queue->AppendFullUpload(upload);
99}
100
101void BitmapContentLayerUpdater::ReduceMemoryUsage() {
102  canvas_.clear();
103  canvas_size_ = gfx::Size();
104}
105
106void BitmapContentLayerUpdater::SetOpaque(bool opaque) {
107  if (opaque != layer_is_opaque_) {
108    canvas_.clear();
109    canvas_size_ = gfx::Size();
110  }
111
112  ContentLayerUpdater::SetOpaque(opaque);
113}
114
115}  // namespace cc
116