1// Copyright 2010 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/layers/picture_image_layer.h"
6
7#include "cc/layers/picture_image_layer_impl.h"
8#include "third_party/skia/include/core/SkCanvas.h"
9
10namespace cc {
11
12scoped_refptr<PictureImageLayer> PictureImageLayer::Create() {
13  return make_scoped_refptr(new PictureImageLayer());
14}
15
16PictureImageLayer::PictureImageLayer() : PictureLayer(this) {}
17
18PictureImageLayer::~PictureImageLayer() {
19  ClearClient();
20}
21
22scoped_ptr<LayerImpl> PictureImageLayer::CreateLayerImpl(
23    LayerTreeImpl* tree_impl) {
24  return PictureImageLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
25}
26
27bool PictureImageLayer::HasDrawableContent() const {
28  return !bitmap_.isNull() && PictureLayer::HasDrawableContent();
29}
30
31void PictureImageLayer::SetBitmap(const SkBitmap& bitmap) {
32  // SetBitmap() currently gets called whenever there is any
33  // style change that affects the layer even if that change doesn't
34  // affect the actual contents of the image (e.g. a CSS animation).
35  // With this check in place we avoid unecessary texture uploads.
36  if (bitmap.pixelRef() && bitmap.pixelRef() == bitmap_.pixelRef())
37    return;
38
39  bitmap_ = bitmap;
40  UpdateDrawsContent(HasDrawableContent());
41  SetNeedsDisplay();
42}
43
44void PictureImageLayer::PaintContents(
45    SkCanvas* canvas,
46    const gfx::Rect& clip,
47    ContentLayerClient::GraphicsContextStatus gc_status) {
48  if (!bitmap_.width() || !bitmap_.height())
49    return;
50
51  SkScalar content_to_layer_scale_x =
52      SkFloatToScalar(static_cast<float>(bounds().width()) / bitmap_.width());
53  SkScalar content_to_layer_scale_y =
54      SkFloatToScalar(static_cast<float>(bounds().height()) / bitmap_.height());
55  canvas->scale(content_to_layer_scale_x, content_to_layer_scale_y);
56
57  // Because Android WebView resourceless software draw mode rasters directly
58  // to the root canvas, this draw must use the kSrcOver_Mode so that
59  // transparent images blend correctly.
60  canvas->drawBitmap(bitmap_, 0, 0);
61}
62
63bool PictureImageLayer::FillsBoundsCompletely() const {
64  return false;
65}
66
67}  // namespace cc
68