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1 /*
2  * Copyright (c) 2013, 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 #include "platform/graphics/ImageBufferSurface.h"
34 
35 #include "platform/graphics/ImageBuffer.h"
36 #include "third_party/skia/include/core/SkCanvas.h"
37 #include "third_party/skia/include/core/SkDevice.h"
38 #include "third_party/skia/include/core/SkPicture.h"
39 
40 namespace blink {
41 
ImageBufferSurface(const IntSize & size,OpacityMode opacityMode)42 ImageBufferSurface::ImageBufferSurface(const IntSize& size, OpacityMode opacityMode)
43     : m_opacityMode(opacityMode)
44     , m_size(size)
45 {
46     setIsHidden(false);
47 }
48 
getPicture()49 PassRefPtr<SkPicture> ImageBufferSurface::getPicture()
50 {
51     return nullptr;
52 }
53 
clear()54 void ImageBufferSurface::clear()
55 {
56     // Clear the background transparent or opaque, as required. It would be nice if this wasn't
57     // required, but the canvas is currently filled with the magic transparency
58     // color. Can we have another way to manage this?
59     if (isValid()) {
60         if (m_opacityMode == Opaque)
61             canvas()->drawARGB(255, 0, 0, 0, SkXfermode::kSrc_Mode);
62         else
63             canvas()->drawARGB(0, 0, 0, 0, SkXfermode::kClear_Mode);
64         didClearCanvas();
65     }
66 }
67 
bitmap()68 const SkBitmap& ImageBufferSurface::bitmap()
69 {
70     ASSERT(canvas());
71     willAccessPixels();
72     return canvas()->getTopDevice()->accessBitmap(false);
73 }
74 
cachedBitmap() const75 const SkBitmap& ImageBufferSurface::cachedBitmap() const
76 {
77     DEFINE_STATIC_LOCAL(SkBitmap, nullBitmap, ());
78     return nullBitmap;
79 }
80 
81 } // namespace blink
82