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35 #include "ImageSource.h"
36 #include "SharedBuffer.h"
41 #include <CoreGraphics/CGImage.h>
43 #include <wtf/PassRefPtr.h>
44 #include <wtf/RetainPtr.h>
46 using namespace WebCore;
50 WebImage WebImage::fromData(const WebData& data, const WebSize& desiredSize)
53 source.setData(PassRefPtr<SharedBuffer>(data).get(), true);
54 if (!source.isSizeAvailable())
57 // Frames are arranged by decreasing size, then decreasing bit depth.
58 // Pick the frame closest to |desiredSize|'s area without being smaller,
59 // which has the highest bit depth.
60 const size_t frameCount = source.frameCount();
61 size_t index = 0; // Default to first frame if none are large enough.
62 int frameAreaAtIndex = 0;
63 for (size_t i = 0; i < frameCount; ++i) {
64 const IntSize frameSize = source.frameSizeAtIndex(i);
65 if (WebSize(frameSize) == desiredSize) {
67 break; // Perfect match.
69 const int frameArea = frameSize.width() * frameSize.height();
70 if (frameArea < (desiredSize.width * desiredSize.height))
71 break; // No more frames that are large enough.
73 if (!i || (frameArea < frameAreaAtIndex)) {
74 index = i; // Closer to desired area than previous best match.
75 frameAreaAtIndex = frameArea;
79 RetainPtr<CGImageRef> frame(AdoptCF, source.createFrameAtIndex(index));
83 return WebImage(frame.get());
86 void WebImage::reset()
88 CGImageRelease(m_imageRef);
92 void WebImage::assign(const WebImage& image)
94 assign(image.m_imageRef);
97 bool WebImage::isNull() const
102 WebSize WebImage::size() const
104 return WebSize(CGImageGetWidth(m_imageRef), CGImageGetHeight(m_imageRef));
107 WebImage::WebImage(const PassRefPtr<Image>& image)
111 if (image.get() && (p = image->nativeImageForCurrentFrame()))
115 WebImage& WebImage::operator=(const PassRefPtr<Image>& image)
118 if (image.get() && (p = image->nativeImageForCurrentFrame()))
125 void WebImage::assign(CGImageRef imageRef)
127 // Make sure to retain the imageRef first incase m_imageRef == imageRef.
128 CGImageRetain(imageRef);
129 CGImageRelease(m_imageRef);
130 m_imageRef = imageRef;
133 } // namespace WebKit