RepetitionCount ImageDecoder::repetitionCount() const
{
RetainPtr<CFDictionaryRef> properties = adoptCF(CGImageSourceCopyProperties(m_nativeDecoder.get(), imageSourceOptions().get()));
if (!properties)
return RepetitionCountOnce;
CFDictionaryRef gifProperties = (CFDictionaryRef)CFDictionaryGetValue(properties.get(), kCGImagePropertyGIFDictionary);
if (gifProperties) {
CFNumberRef num = (CFNumberRef)CFDictionaryGetValue(gifProperties, kCGImagePropertyGIFLoopCount);
// No property means loop once.
if (!num)
return RepetitionCountOnce;
RepetitionCount loopCount;
CFNumberGetValue(num, kCFNumberIntType, &loopCount);
// A property with value 0 means loop forever.
return loopCount ? loopCount : RepetitionCountInfinite;
}
CFDictionaryRef pngProperties = (CFDictionaryRef)CFDictionaryGetValue(properties.get(), kCGImagePropertyPNGDictionary);
if (pngProperties) {
CFNumberRef num = (CFNumberRef)CFDictionaryGetValue(pngProperties, WebCoreCGImagePropertyAPNGLoopCount);
if (!num)
return RepetitionCountOnce;
RepetitionCount loopCount;
CFNumberGetValue(num, kCFNumberIntType, &loopCount);
return loopCount ? loopCount : RepetitionCountInfinite;
}
// Turns out we're not an animated image after all, so we don't animate.
return RepetitionCountNone;
}
err_t MacCGDecoder::readHeader()
{
// Do not read header more than once.
if (_headerResult)
return _headerResult;
CFDictionaryRef cgDict = CGImageSourceCopyProperties(_cgImageSource, NULL);
if (cgDict == NULL)
return (_headerResult = ERR_IMAGEIO_INTERNAL_ERROR);
// TODO: How to get width/height/depth and other information from the
// cgDict?
CFRelease(cgDict);
return ERR_OK;
}
int ImageSource::repetitionCount()
{
int result = cAnimationLoopOnce; // No property means loop once.
if (!initialized())
return result;
// A property with value 0 means loop forever.
RetainPtr<CFDictionaryRef> properties(AdoptCF, CGImageSourceCopyProperties(m_decoder, imageSourceOptions()));
if (properties) {
CFDictionaryRef gifProperties = (CFDictionaryRef)CFDictionaryGetValue(properties.get(), kCGImagePropertyGIFDictionary);
if (gifProperties) {
CFNumberRef num = (CFNumberRef)CFDictionaryGetValue(gifProperties, kCGImagePropertyGIFLoopCount);
if (num)
CFNumberGetValue(num, kCFNumberIntType, &result);
} else
result = cAnimationNone; // Turns out we're not a GIF after all, so we don't animate.
}
return result;
}
