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
34namespace WebCore {
35
36static ImageFrame::PixelData* getPtrAsPixelData(CFMutableDataRef data)
37{
38    return data ? reinterpret_cast<ImageFrame::PixelData*>(CFDataGetMutableBytePtr(data)) : 0;
39}
40
41void 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
51bool 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
63bool 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
79static 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#if !defined(TARGETING_TIGER) && !defined(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
94NativeImagePtr 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