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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
* Copyright (C) 2010, 2011 Apple 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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"
#include "ShareableBitmap.h"
#include <WebCore/GraphicsContext.h>
#include <wtf/RetainPtr.h>
#include "CGUtilities.h"
using namespace WebCore;
namespace WebKit {
static CGBitmapInfo bitmapInfo(ShareableBitmap::Flags flags)
{
CGBitmapInfo info = kCGBitmapByteOrder32Host;
if (flags & ShareableBitmap::SupportsAlpha)
info |= kCGImageAlphaPremultipliedFirst;
else
info |= kCGImageAlphaNoneSkipFirst;
return info;
}
PassOwnPtr<GraphicsContext> ShareableBitmap::createGraphicsContext()
{
RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, CGColorSpaceCreateDeviceRGB());
ref(); // Balanced by deref in releaseBitmapContextData.
RetainPtr<CGContextRef> bitmapContext(AdoptCF, CGBitmapContextCreateWithData(data(),
m_size.width(), m_size.height(), 8, m_size.width() * 4, colorSpace.get(),
bitmapInfo(m_flags), releaseBitmapContextData, this));
// We want the origin to be in the top left corner so we flip the backing store context.
CGContextTranslateCTM(bitmapContext.get(), 0, m_size.height());
CGContextScaleCTM(bitmapContext.get(), 1, -1);
return adoptPtr(new GraphicsContext(bitmapContext.get()));
}
void ShareableBitmap::paint(WebCore::GraphicsContext& context, const IntPoint& dstPoint, const IntRect& srcRect)
{
paintImage(context.platformContext(), makeCGImageCopy().get(), dstPoint, srcRect);
}
RetainPtr<CGImageRef> ShareableBitmap::makeCGImageCopy()
{
OwnPtr<GraphicsContext> graphicsContext = createGraphicsContext();
RetainPtr<CGImageRef> image(AdoptCF, CGBitmapContextCreateImage(graphicsContext->platformContext()));
return image;
}
RetainPtr<CGImageRef> ShareableBitmap::makeCGImage()
{
ref(); // Balanced by deref in releaseDataProviderData.
RetainPtr<CGDataProvider> dataProvider(AdoptCF, CGDataProviderCreateWithData(this, data(), sizeInBytes(), releaseDataProviderData));
RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, CGColorSpaceCreateDeviceRGB());
RetainPtr<CGImageRef> image(AdoptCF, CGImageCreate(m_size.width(), m_size.height(), 8, 32, m_size.width() * 4, colorSpace.get(), bitmapInfo(m_flags), dataProvider.get(), 0, false, kCGRenderingIntentDefault));
return image;
}
void ShareableBitmap::releaseBitmapContextData(void* typelessBitmap, void* typelessData)
{
ShareableBitmap* bitmap = static_cast<ShareableBitmap*>(typelessBitmap);
ASSERT_UNUSED(typelessData, bitmap->data() == typelessData);
bitmap->deref(); // Balanced by ref in createGraphicsContext.
}
void ShareableBitmap::releaseDataProviderData(void* typelessBitmap, const void* typelessData, size_t)
{
ShareableBitmap* bitmap = static_cast<ShareableBitmap*>(typelessBitmap);
ASSERT_UNUSED(typelessData, bitmap->data() == typelessData);
bitmap->deref(); // Balanced by ref in createCGImage.
}
} // namespace WebKit
|
