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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/*
* Copyright (C) 2010 Apple Inc. All rights reserved.
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(3D_CANVAS)
#include "GraphicsContext3D.h"
#include "Image.h"
#include "NativeImageSkia.h"
namespace WebCore {
bool GraphicsContext3D::getImageData(Image* image,
Vector<uint8_t>& outputVector,
bool premultiplyAlpha,
bool* hasAlphaChannel,
AlphaOp* neededAlphaOp,
unsigned int* format)
{
if (!image)
return false;
NativeImageSkia* skiaImage = image->nativeImageForCurrentFrame();
if (!skiaImage)
return false;
SkBitmap::Config skiaConfig = skiaImage->config();
// FIXME: must support more image configurations.
if (skiaConfig != SkBitmap::kARGB_8888_Config)
return false;
SkBitmap& skiaImageRef = *skiaImage;
SkAutoLockPixels lock(skiaImageRef);
int width = skiaImage->width();
int height = skiaImage->height();
int rowBytes = skiaImage->rowBytes();
ASSERT(rowBytes == width * 4);
uint8_t* pixels = reinterpret_cast<uint8_t*>(skiaImage->getPixels());
outputVector.resize(rowBytes * height);
memcpy(outputVector.data(), pixels, rowBytes * height);
*hasAlphaChannel = true;
if (!premultiplyAlpha)
// FIXME: must fetch the image data before the premultiplication step
*neededAlphaOp = kAlphaDoUnmultiply;
// FIXME: remove this dependency on desktop OpenGL
*format = 0x80E1; // GL_BGRA
return true;
}
} // namespace WebCore
#endif // ENABLE(3D_CANVAS)
|
