1 /*
2 * Copyright (C) 2010 Google, Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "ImageDecoder.h"
28
29 #include "GraphicsContextCG.h"
30
31 #include <CoreGraphics/CGColorSpace.h>
32 #include <CoreGraphics/CGImage.h>
33
34 namespace WebCore {
35
getPtrAsPixelData(CFMutableDataRef data)36 static ImageFrame::PixelData* getPtrAsPixelData(CFMutableDataRef data)
37 {
38 return data ? reinterpret_cast<ImageFrame::PixelData*>(CFDataGetMutableBytePtr(data)) : 0;
39 }
40
copyReferenceToBitmapData(const ImageFrame & other)41 void ImageFrame::copyReferenceToBitmapData(const ImageFrame& other)
42 {
43 ASSERT(this != &other);
44 m_backingStore = other.m_backingStore;
45 m_bytes = getPtrAsPixelData(m_backingStore.get());
46 // FIXME: The rest of this function seems redundant with ImageFrame::copyBitmapData.
47 m_size = other.m_size;
48 setHasAlpha(other.m_hasAlpha);
49 }
50
copyBitmapData(const ImageFrame & other)51 bool ImageFrame::copyBitmapData(const ImageFrame& other)
52 {
53 if (this == &other)
54 return true;
55
56 m_backingStore.adoptCF(CFDataCreateMutableCopy(kCFAllocatorDefault, 0, other.m_backingStore.get()));
57 m_bytes = getPtrAsPixelData(m_backingStore.get());
58 m_size = other.m_size;
59 setHasAlpha(other.m_hasAlpha);
60 return true;
61 }
62
setSize(int newWidth,int newHeight)63 bool ImageFrame::setSize(int newWidth, int newHeight)
64 {
65 ASSERT(!m_backingStore);
66 size_t backingStoreSize = newWidth * newHeight * sizeof(PixelData);
67 CFMutableDataRef backingStoreRef = CFDataCreateMutable(kCFAllocatorDefault, backingStoreSize);
68 if (!backingStoreRef)
69 return false;
70 m_backingStore.adoptCF(backingStoreRef);
71 CFDataSetLength(backingStoreRef, backingStoreSize);
72 m_bytes = reinterpret_cast<PixelData*>(CFDataGetMutableBytePtr(m_backingStore.get()));
73 m_size = IntSize(newWidth, newHeight);
74
75 zeroFillPixelData();
76 return true;
77 }
78
createColorSpace(const ColorProfile & colorProfile)79 static CGColorSpaceRef createColorSpace(const ColorProfile& colorProfile)
80 {
81 if (colorProfile.isEmpty())
82 return CGColorSpaceCreateDeviceRGB();
83
84 RetainPtr<CFDataRef> data(AdoptCF, CFDataCreate(kCFAllocatorDefault, reinterpret_cast<const UInt8*>(colorProfile.data()), colorProfile.size()));
85 #ifndef TARGETING_LEOPARD
86 return CGColorSpaceCreateWithICCProfile(data.get());
87 #else
88 RetainPtr<CGDataProviderRef> profileDataProvider(AdoptCF, CGDataProviderCreateWithCFData(data.get()));
89 CGFloat ranges[] = {0.0, 255.0, 0.0, 255.0, 0.0, 255.0};
90 return CGColorSpaceCreateICCBased(3, ranges, profileDataProvider.get(), deviceRGBColorSpaceRef());
91 #endif
92 }
93
asNewNativeImage() const94 NativeImagePtr ImageFrame::asNewNativeImage() const
95 {
96 RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, createColorSpace(m_colorProfile));
97 RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateWithCFData(m_backingStore.get()));
98
99 CGImageAlphaInfo alphaInfo = m_premultiplyAlpha ? kCGImageAlphaPremultipliedFirst : kCGImageAlphaFirst;
100
101 return CGImageCreate(width(), height(), 8, 32, width() * sizeof(PixelData), colorSpace.get(),
102 alphaInfo | kCGBitmapByteOrder32Host, dataProvider.get(), 0, /*shouldInterpolate=*/true, kCGRenderingIntentDefault);
103 }
104
105 } // namespace WebCore
106