1 /*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 * Copyright (C) 2010 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28
29 #if ENABLE(WEBGL)
30
31 #include "GraphicsContext3D.h"
32
33 #include "BitmapImage.h"
34 #include "Image.h"
35 #include "ImageSource.h"
36 #include "NativeImageSkia.h"
37 #include <wtf/OwnPtr.h>
38 #include <wtf/PassOwnPtr.h>
39
40 #include <algorithm>
41
42 namespace WebCore {
43
getImageData(Image * image,GC3Denum format,GC3Denum type,bool premultiplyAlpha,bool ignoreGammaAndColorProfile,Vector<uint8_t> & outputVector)44 bool GraphicsContext3D::getImageData(Image* image,
45 GC3Denum format,
46 GC3Denum type,
47 bool premultiplyAlpha,
48 bool ignoreGammaAndColorProfile,
49 Vector<uint8_t>& outputVector)
50 {
51 if (!image)
52 return false;
53 OwnPtr<NativeImageSkia> pixels;
54 NativeImageSkia* skiaImage = image->nativeImageForCurrentFrame();
55 AlphaOp neededAlphaOp = AlphaDoNothing;
56 bool hasAlpha = skiaImage ? !skiaImage->isOpaque() : true;
57 if ((!skiaImage || ignoreGammaAndColorProfile || (hasAlpha && !premultiplyAlpha)) && image->data()) {
58 ImageSource decoder(ImageSource::AlphaNotPremultiplied,
59 ignoreGammaAndColorProfile ? ImageSource::GammaAndColorProfileIgnored : ImageSource::GammaAndColorProfileApplied);
60 // Attempt to get raw unpremultiplied image data
61 decoder.setData(image->data(), true);
62 if (!decoder.frameCount() || !decoder.frameIsCompleteAtIndex(0))
63 return false;
64 hasAlpha = decoder.frameHasAlphaAtIndex(0);
65 pixels = adoptPtr(decoder.createFrameAtIndex(0));
66 if (!pixels.get() || !pixels->isDataComplete() || !pixels->width() || !pixels->height())
67 return false;
68 SkBitmap::Config skiaConfig = pixels->config();
69 if (skiaConfig != SkBitmap::kARGB_8888_Config)
70 return false;
71 skiaImage = pixels.get();
72 if (hasAlpha && premultiplyAlpha)
73 neededAlphaOp = AlphaDoPremultiply;
74 } else if (!premultiplyAlpha && hasAlpha)
75 neededAlphaOp = AlphaDoUnmultiply;
76 if (!skiaImage)
77 return false;
78 SkBitmap& skiaImageRef = *skiaImage;
79 SkAutoLockPixels lock(skiaImageRef);
80 ASSERT(skiaImage->rowBytes() == skiaImage->width() * 4);
81 outputVector.resize(skiaImage->rowBytes() * skiaImage->height());
82 return packPixels(reinterpret_cast<const uint8_t*>(skiaImage->getPixels()),
83 SourceFormatBGRA8, skiaImage->width(), skiaImage->height(), 0,
84 format, type, neededAlphaOp, outputVector.data());
85 }
86
87 } // namespace WebCore
88
89 #endif // ENABLE(WEBGL)
90