1// Copyright 2012 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/image_layer_updater.h"
6#include "cc/resources/prioritized_resource.h"
7#include "cc/resources/resource_update_queue.h"
8
9namespace cc {
10
11ImageLayerUpdater::Resource::Resource(ImageLayerUpdater* updater,
12                                      scoped_ptr<PrioritizedResource> texture)
13    : LayerUpdater::Resource(texture.Pass()), updater_(updater) {}
14
15ImageLayerUpdater::Resource::~Resource() {}
16
17void ImageLayerUpdater::Resource::Update(ResourceUpdateQueue* queue,
18                                         const gfx::Rect& source_rect,
19                                         const gfx::Vector2d& dest_offset,
20                                         bool partial_update) {
21  updater_->UpdateTexture(
22      queue, texture(), source_rect, dest_offset, partial_update);
23}
24
25// static
26scoped_refptr<ImageLayerUpdater> ImageLayerUpdater::Create() {
27  return make_scoped_refptr(new ImageLayerUpdater());
28}
29
30scoped_ptr<LayerUpdater::Resource> ImageLayerUpdater::CreateResource(
31    PrioritizedResourceManager* manager) {
32  return scoped_ptr<LayerUpdater::Resource>(
33      new Resource(this, PrioritizedResource::Create(manager)));
34}
35
36void ImageLayerUpdater::UpdateTexture(ResourceUpdateQueue* queue,
37                                      PrioritizedResource* texture,
38                                      const gfx::Rect& source_rect,
39                                      const gfx::Vector2d& dest_offset,
40                                      bool partial_update) {
41  // Source rect should never go outside the image pixels, even if this
42  // is requested because the texture extends outside the image.
43  gfx::Rect clipped_source_rect = source_rect;
44  gfx::Rect image_rect = gfx::Rect(0, 0, bitmap_.width(), bitmap_.height());
45  clipped_source_rect.Intersect(image_rect);
46
47  gfx::Vector2d clipped_dest_offset =
48      dest_offset +
49      gfx::Vector2d(clipped_source_rect.origin() - source_rect.origin());
50
51  ResourceUpdate upload = ResourceUpdate::Create(
52      texture, &bitmap_, image_rect, clipped_source_rect, clipped_dest_offset);
53  if (partial_update)
54    queue->AppendPartialUpload(upload);
55  else
56    queue->AppendFullUpload(upload);
57}
58
59void ImageLayerUpdater::SetBitmap(const SkBitmap& bitmap) {
60  DCHECK(bitmap.pixelRef());
61  bitmap_ = bitmap;
62}
63
64bool ImageLayerUpdater::UsingBitmap(const SkBitmap& bitmap) const {
65  return bitmap.pixelRef() == bitmap_.pixelRef();
66}
67
68}  // namespace cc
69