1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "caching_bitmap_canvas_layer_texture_updater.h"
#include "LayerPainterChromium.h"
#include "skia/ext/platform_canvas.h"
namespace cc {
PassRefPtr<CachingBitmapCanvasLayerTextureUpdater>
CachingBitmapCanvasLayerTextureUpdater::Create(
PassOwnPtr<LayerPainterChromium> painter) {
return adoptRef(new CachingBitmapCanvasLayerTextureUpdater(painter));
}
CachingBitmapCanvasLayerTextureUpdater::CachingBitmapCanvasLayerTextureUpdater(
PassOwnPtr<LayerPainterChromium> painter)
: BitmapCanvasLayerTextureUpdater(painter),
pixels_did_change_(false) {
}
void CachingBitmapCanvasLayerTextureUpdater::prepareToUpdate(
const IntRect& content_rect,
const IntSize& tile_size,
float contents_width_scale,
float contents_height_scale,
IntRect& resulting_opaque_rect,
CCRenderingStats& stats) {
BitmapCanvasLayerTextureUpdater::prepareToUpdate(content_rect,
tile_size,
contents_width_scale,
contents_height_scale,
resulting_opaque_rect,
stats);
const SkBitmap& new_bitmap = m_canvas->getDevice()->accessBitmap(false);
SkAutoLockPixels lock(new_bitmap);
ASSERT(new_bitmap.bytesPerPixel() > 0);
pixels_did_change_ = new_bitmap.config() != cached_bitmap_.config() ||
new_bitmap.height() != cached_bitmap_.height() ||
new_bitmap.width() != cached_bitmap_.width() ||
memcmp(new_bitmap.getPixels(),
cached_bitmap_.getPixels(),
new_bitmap.getSafeSize());
if (pixels_did_change_)
new_bitmap.deepCopyTo(&cached_bitmap_, new_bitmap.config());
}
bool CachingBitmapCanvasLayerTextureUpdater::pixelsDidChange() const
{
return pixels_did_change_;
}
} // namespace cc
|
