IntSize ImageSource::frameSizeAtIndex(size_t index, ImageOrientationDescription description) const
{
RetainPtr<CFDictionaryRef> properties = adoptCF(CGImageSourceCopyPropertiesAtIndex(m_decoder, index, imageSourceOptions(SkipMetadata)));
if (!properties)
return IntSize();
int w = 0, h = 0;
CFNumberRef num = (CFNumberRef)CFDictionaryGetValue(properties.get(), kCGImagePropertyPixelWidth);
if (num)
CFNumberGetValue(num, kCFNumberIntType, &w);
num = (CFNumberRef)CFDictionaryGetValue(properties.get(), kCGImagePropertyPixelHeight);
if (num)
CFNumberGetValue(num, kCFNumberIntType, &h);
#if PLATFORM(IOS)
if (!m_isProgressive) {
CFDictionaryRef jfifProperties = static_cast<CFDictionaryRef>(CFDictionaryGetValue(properties.get(), kCGImagePropertyJFIFDictionary));
if (jfifProperties) {
CFBooleanRef isProgCFBool = static_cast<CFBooleanRef>(CFDictionaryGetValue(jfifProperties, kCGImagePropertyJFIFIsProgressive));
if (isProgCFBool)
m_isProgressive = CFBooleanGetValue(isProgCFBool);
// Workaround for <rdar://problem/5184655> - Hang rendering very large progressive JPEG. Decoding progressive
// images hangs for a very long time right now. Until this is fixed, don't sub-sample progressive images. This
// will cause them to fail our large image check and they won't be decoded.
// FIXME: Remove once underlying issue is fixed (<rdar://problem/5191418>)
}
}
if ((m_baseSubsampling == 0) && !m_isProgressive) {
IntSize subsampledSize(w, h);
const int cMaximumImageSizeBeforeSubsampling = 5 * 1024 * 1024;
while ((m_baseSubsampling < 3) && subsampledSize.width() * subsampledSize.height() > cMaximumImageSizeBeforeSubsampling) {
// We know the size, but the actual image is very large and should be sub-sampled.
// Increase the base subsampling and ask for the size again. If the image can be subsampled, the size will be
// greatly reduced. 4x sub-sampling will make us support up to 320MP (5MP * 4^3) images, which should be plenty.
// There's no callback from ImageIO when the size is available, so we do the check when we happen
// to check the size and its non - zero.
// Note: Some clients of this class don't call isSizeAvailable() so we can't rely on that.
++m_baseSubsampling;
subsampledSize = frameSizeAtIndex(index, description.respectImageOrientation());
}
w = subsampledSize.width();
h = subsampledSize.height();
}
#endif
if ((description.respectImageOrientation() == RespectImageOrientation) && orientationFromProperties(properties.get()).usesWidthAsHeight())
return IntSize(h, w);
return IntSize(w, h);
}
void BitmapImage::draw(GraphicsContext& context, const FloatRect& dst, const FloatRect& src, CompositeOperator op,
BlendMode blendMode, ImageOrientationDescription description)
{
if (!dst.width() || !dst.height() || !src.width() || !src.height())
return;
startAnimation();
auto surface = frameImageAtIndex(m_currentFrame);
if (!surface) // If it's too early we won't have an image yet.
return;
Color color = singlePixelSolidColor();
if (color.isValid()) {
fillWithSolidColor(context, dst, color, op);
return;
}
context.save();
// Set the compositing operation.
if (op == CompositeSourceOver && blendMode == BlendModeNormal && !frameHasAlphaAtIndex(m_currentFrame))
context.setCompositeOperation(CompositeCopy);
else
context.setCompositeOperation(op, blendMode);
#if ENABLE(IMAGE_DECODER_DOWN_SAMPLING)
IntSize scaledSize = cairoSurfaceSize(surface.get());
FloatRect adjustedSrcRect = adjustSourceRectForDownSampling(src, scaledSize);
#else
FloatRect adjustedSrcRect(src);
#endif
ImageOrientation frameOrientation(description.imageOrientation());
if (description.respectImageOrientation() == RespectImageOrientation)
frameOrientation = frameOrientationAtIndex(m_currentFrame);
FloatRect dstRect = dst;
if (frameOrientation != DefaultImageOrientation) {
// ImageOrientation expects the origin to be at (0, 0).
context.translate(dstRect.x(), dstRect.y());
dstRect.setLocation(FloatPoint());
context.concatCTM(frameOrientation.transformFromDefault(dstRect.size()));
if (frameOrientation.usesWidthAsHeight()) {
// The destination rectangle will have it's width and height already reversed for the orientation of
// the image, as it was needed for page layout, so we need to reverse it back here.
dstRect = FloatRect(dstRect.x(), dstRect.y(), dstRect.height(), dstRect.width());
}
}
context.platformContext()->drawSurfaceToContext(surface.get(), dstRect, adjustedSrcRect, context);
context.restore();
if (imageObserver())
imageObserver()->didDraw(this);
}
void BitmapImage::updateSize(ImageOrientationDescription description) const
{
if (!m_sizeAvailable || m_haveSize)
return;
m_size = m_source.size(description);
m_sizeRespectingOrientation = m_source.size(ImageOrientationDescription(RespectImageOrientation, description.imageOrientation()));
m_imageOrientation = static_cast<unsigned>(description.imageOrientation());
m_shouldRespectImageOrientation = static_cast<unsigned>(description.respectImageOrientation());
m_haveSize = true;
determineMinimumSubsamplingLevel();
didDecodeProperties();
}
void BitmapImage::draw(GraphicsContext* ctxt, const FloatRect& destRect, const FloatRect& srcRect, ColorSpace styleColorSpace, CompositeOperator compositeOp, BlendMode blendMode, ImageOrientationDescription description)
{
#if PLATFORM(IOS)
startAnimation(DoNotCatchUp);
#else
startAnimation();
#endif
RetainPtr<CGImageRef> image;
// Never use subsampled images for drawing into PDF contexts.
if (wkCGContextIsPDFContext(ctxt->platformContext()))
image = adoptCF(copyUnscaledFrameAtIndex(m_currentFrame));
else {
CGRect transformedDestinationRect = CGRectApplyAffineTransform(destRect, CGContextGetCTM(ctxt->platformContext()));
float subsamplingScale = std::min<float>(1, std::max(transformedDestinationRect.size.width / srcRect.width(), transformedDestinationRect.size.height / srcRect.height()));
image = frameAtIndex(m_currentFrame, subsamplingScale);
}
if (!image) // If it's too early we won't have an image yet.
return;
if (mayFillWithSolidColor()) {
fillWithSolidColor(ctxt, destRect, solidColor(), styleColorSpace, compositeOp);
return;
}
// Subsampling may have given us an image that is smaller than size().
IntSize imageSize(CGImageGetWidth(image.get()), CGImageGetHeight(image.get()));
// srcRect is in the coordinates of the unsubsampled image, so we have to map it to the subsampled image.
FloatRect scaledSrcRect = srcRect;
if (imageSize != m_size) {
FloatRect originalImageBounds(FloatPoint(), m_size);
FloatRect subsampledImageBounds(FloatPoint(), imageSize);
scaledSrcRect = mapRect(srcRect, originalImageBounds, subsampledImageBounds);
}
ImageOrientation orientation;
if (description.respectImageOrientation() == RespectImageOrientation)
orientation = frameOrientationAtIndex(m_currentFrame);
ctxt->drawNativeImage(image.get(), imageSize, styleColorSpace, destRect, scaledSrcRect, compositeOp, blendMode, orientation);
if (imageObserver())
imageObserver()->didDraw(this);
}
void BitmapImage::draw(GraphicsContext* ctxt, const FloatRect& destRect, const FloatRect& srcRect, ColorSpace styleColorSpace, CompositeOperator compositeOp, BlendMode blendMode, ImageOrientationDescription description)
{
CGImageRef image;
#if !PLATFORM(IOS)
startAnimation();
image = frameAtIndex(m_currentFrame);
#else
startAnimation(DoNotCatchUp);
CGRect transformedDestinationRect = CGRectApplyAffineTransform(destRect, CGContextGetCTM(ctxt->platformContext()));
RetainPtr<CGImageRef> imagePossiblyCopied;
// Never use subsampled images for drawing into PDF contexts.
if (CGContextGetType(ctxt->platformContext()) == kCGContextTypePDF)
imagePossiblyCopied = adoptCF(copyUnscaledFrameAtIndex(m_currentFrame));
else
imagePossiblyCopied = frameAtIndex(m_currentFrame, std::min<float>(1.0f, std::max(transformedDestinationRect.size.width / srcRect.width(), transformedDestinationRect.size.height / srcRect.height())));
image = imagePossiblyCopied.get();
#endif
if (!image) // If it's too early we won't have an image yet.
return;
if (mayFillWithSolidColor()) {
fillWithSolidColor(ctxt, destRect, solidColor(), styleColorSpace, compositeOp);
return;
}
float scale = 1;
#if PLATFORM(IOS)
scale = m_frames[m_currentFrame].m_scale;
#endif
FloatSize selfSize = currentFrameSize();
ImageOrientation orientation;
if (description.respectImageOrientation() == RespectImageOrientation)
orientation = frameOrientationAtIndex(m_currentFrame);
ctxt->drawNativeImage(image, selfSize, styleColorSpace, destRect, srcRect, scale, compositeOp, blendMode, orientation);
if (imageObserver())
imageObserver()->didDraw(this);
}
IntSize ImageSource::frameSizeAtIndex(size_t index, SubsamplingLevel subsamplingLevel, ImageOrientationDescription description) const
{
RetainPtr<CFDictionaryRef> properties = adoptCF(CGImageSourceCopyPropertiesAtIndex(m_decoder, index, imageSourceOptions(subsamplingLevel).get()));
if (!properties)
return IntSize();
int width = 0;
int height = 0;
CFNumberRef num = (CFNumberRef)CFDictionaryGetValue(properties.get(), kCGImagePropertyPixelWidth);
if (num)
CFNumberGetValue(num, kCFNumberIntType, &width);
num = (CFNumberRef)CFDictionaryGetValue(properties.get(), kCGImagePropertyPixelHeight);
if (num)
CFNumberGetValue(num, kCFNumberIntType, &height);
if ((description.respectImageOrientation() == RespectImageOrientation) && orientationFromProperties(properties.get()).usesWidthAsHeight())
return IntSize(height, width);
return IntSize(width, height);
}