1 /*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32
33 #if USE(ACCELERATED_COMPOSITING)
34
35 #include "ImageLayerChromium.h"
36
37 #include "cc/CCLayerImpl.h"
38 #include "Image.h"
39 #include "LayerRendererChromium.h"
40 #include "LayerTexture.h"
41
42 namespace WebCore {
43
create(GraphicsLayerChromium * owner)44 PassRefPtr<ImageLayerChromium> ImageLayerChromium::create(GraphicsLayerChromium* owner)
45 {
46 return adoptRef(new ImageLayerChromium(owner));
47 }
48
ImageLayerChromium(GraphicsLayerChromium * owner)49 ImageLayerChromium::ImageLayerChromium(GraphicsLayerChromium* owner)
50 : ContentLayerChromium(owner)
51 , m_imageForCurrentFrame(0)
52 , m_contents(0)
53 {
54 }
55
setContents(Image * contents)56 void ImageLayerChromium::setContents(Image* contents)
57 {
58 // setContents() currently gets called whenever there is any
59 // style change that affects the layer even if that change doesn't
60 // affect the actual contents of the image (e.g. a CSS animation).
61 // With this check in place we avoid unecessary texture uploads.
62 if ((m_contents == contents) && (m_contents->nativeImageForCurrentFrame() == m_imageForCurrentFrame))
63 return;
64
65 m_contents = contents;
66 m_imageForCurrentFrame = m_contents->nativeImageForCurrentFrame();
67 m_dirtyRect = IntRect(IntPoint(0, 0), bounds());
68 setNeedsDisplay();
69 }
70
paintContentsIfDirty(const IntRect &)71 void ImageLayerChromium::paintContentsIfDirty(const IntRect&)
72 {
73 ASSERT(layerRenderer());
74
75 if (!m_dirtyRect.isEmpty()) {
76 m_decodedImage.updateFromImage(m_contents->nativeImageForCurrentFrame());
77 updateLayerSize(m_decodedImage.size());
78 IntRect paintRect(IntPoint(0, 0), m_decodedImage.size());
79 if (!m_dirtyRect.isEmpty()) {
80 m_tiler->invalidateRect(paintRect);
81 m_dirtyRect = IntRect();
82 }
83 }
84 }
85
updateCompositorResources()86 void ImageLayerChromium::updateCompositorResources()
87 {
88 IntRect paintRect(IntPoint(0, 0), m_decodedImage.size());
89 m_tiler->updateFromPixels(paintRect, paintRect, m_decodedImage.pixels());
90 }
91
layerBounds() const92 IntRect ImageLayerChromium::layerBounds() const
93 {
94 return IntRect(IntPoint(0, 0), m_decodedImage.size());
95 }
96
tilingTransform()97 TransformationMatrix ImageLayerChromium::tilingTransform()
98 {
99 // Tiler draws from the upper left corner. The draw transform
100 // specifies the middle of the layer.
101 TransformationMatrix transform = ccLayerImpl()->drawTransform();
102 const IntRect sourceRect = layerBounds();
103 const IntSize destSize = bounds();
104
105 transform.translate(-destSize.width() / 2.0, -destSize.height() / 2.0);
106
107 // Tiler also draws at the original content size, so rescale the original
108 // image dimensions to the bounds that it is meant to be drawn at.
109 float scaleX = destSize.width() / static_cast<float>(sourceRect.size().width());
110 float scaleY = destSize.height() / static_cast<float>(sourceRect.size().height());
111 transform.scale3d(scaleX, scaleY, 1.0f);
112
113 return transform;
114 }
115
116 }
117 #endif // USE(ACCELERATED_COMPOSITING)
118