#include "config.h"
#include "ImageSource.h"
#if ENABLE(RESPECT_EXIF_ORIENTATION)
#include "BitmapImage.h"
#endif
#if USE(CG)
#include "ImageSourceCG.h"
#include "IntPoint.h"
#include "IntSize.h"
#include "MIMETypeRegistry.h"
#include "SharedBuffer.h"
#include <CoreGraphics/CoreGraphics.h>
#include <CoreGraphics/CGImagePrivate.h>
#include <ImageIO/ImageIO.h>
#include <ImageIO/CGImageSourcePrivate.h>
#include <wtf/UnusedParam.h>
using namespace std;
namespace WebCore {
const CFStringRef kCGImageSourceShouldPreferRGB32 = CFSTR("kCGImageSourceShouldPreferRGB32");
const CFStringRef WebCoreCGImagePropertyGIFUnclampedDelayTime = CFSTR("UnclampedDelayTime");
#if !PLATFORM(MAC)
size_t sharedBufferGetBytesAtPosition(void* info, void* buffer, off_t position, size_t count)
{
SharedBuffer* sharedBuffer = static_cast<SharedBuffer*>(info);
size_t sourceSize = sharedBuffer->size();
if (position >= sourceSize)
return 0;
const char* source = sharedBuffer->data() + position;
size_t amount = min<size_t>(count, sourceSize - position);
memcpy(buffer, source, amount);
return amount;
}
void sharedBufferRelease(void* info)
{
SharedBuffer* sharedBuffer = static_cast<SharedBuffer*>(info);
sharedBuffer->deref();
}
#endif
#if ENABLE(RESPECT_EXIF_ORIENTATION)
bool orientationRequiresWidthAndHeightSwapped(int orientation)
{
return orientation > 4;
}
#endif
ImageSource::ImageSource(ImageSource::AlphaOption alphaOption, ImageSource::GammaAndColorProfileOption gammaAndColorProfileOption)
: m_decoder(0)
, m_alphaOption(alphaOption)
, m_gammaAndColorProfileOption(gammaAndColorProfileOption)
, m_baseSubsampling(0)
, m_isProgressive(false)
{
}
ImageSource::~ImageSource()
{
clear(true);
}
void ImageSource::clear(bool destroyAllFrames, size_t, SharedBuffer* data, bool allDataReceived)
{
#if !defined(BUILDING_ON_LEOPARD)
if (!destroyAllFrames)
return;
#else
UNUSED_PARAM(destroyAllFrames);
#endif
if (m_decoder) {
CFRelease(m_decoder);
m_decoder = 0;
}
if (data)
setData(data, allDataReceived);
}
CFDictionaryRef ImageSource::imageSourceOptions(int requestedSubsampling) const
{
static CFDictionaryRef options[4] = {NULL, NULL, NULL, NULL};
int subsampling = std::min(3, m_isProgressive || requestedSubsampling < 0 ? 0 : (requestedSubsampling + m_baseSubsampling));
if (!options[subsampling]) {
int subsampleInt = 1 << subsampling; CFNumberRef subsampleNumber = CFNumberCreate(NULL, kCFNumberIntType, &subsampleInt);
const void *keys[3] = { kCGImageSourceShouldCache, kCGImageSourceShouldPreferRGB32, kCGImageSourceSubsampleFactor };
const void *values[3] = { kCFBooleanTrue, kCFBooleanTrue, subsampleNumber };
options[subsampling] = CFDictionaryCreate(NULL, keys, values, 3,
&kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
CFRelease(subsampleNumber);
}
return options[subsampling];
}
bool ImageSource::initialized() const
{
return m_decoder;
}
void ImageSource::setData(SharedBuffer* data, bool allDataReceived)
{
#if PLATFORM(MAC)
if (!m_decoder)
m_decoder = CGImageSourceCreateIncremental(0);
RetainPtr<CFDataRef> cfData(AdoptCF, data->createCFData());
CGImageSourceUpdateData(m_decoder, cfData.get(), allDataReceived);
#else
if (!m_decoder) {
m_decoder = CGImageSourceCreateIncremental(0);
} else if (allDataReceived) {
#if !PLATFORM(WIN)
CFRelease(m_decoder);
m_decoder = CGImageSourceCreateIncremental(0);
#endif
}
data->ref();
CGDataProviderDirectCallbacks providerCallbacks = { 0, 0, 0, sharedBufferGetBytesAtPosition, sharedBufferRelease };
RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateDirect(data, data->size(), &providerCallbacks));
CGImageSourceUpdateDataProvider(m_decoder, dataProvider.get(), allDataReceived);
#endif
}
String ImageSource::filenameExtension() const
{
if (!m_decoder)
return String();
CFStringRef imageSourceType = CGImageSourceGetType(m_decoder);
return WebCore::preferredExtensionForImageSourceType(imageSourceType);
}
bool ImageSource::isSizeAvailable()
{
bool result = false;
CGImageSourceStatus imageSourceStatus = CGImageSourceGetStatus(m_decoder);
if (imageSourceStatus >= kCGImageStatusIncomplete) {
RetainPtr<CFDictionaryRef> image0Properties(AdoptCF, CGImageSourceCopyPropertiesAtIndex(m_decoder, 0, imageSourceOptions()));
if (image0Properties) {
CFNumberRef widthNumber = (CFNumberRef)CFDictionaryGetValue(image0Properties.get(), kCGImagePropertyPixelWidth);
CFNumberRef heightNumber = (CFNumberRef)CFDictionaryGetValue(image0Properties.get(), kCGImagePropertyPixelHeight);
result = widthNumber && heightNumber;
}
}
return result;
}
IntSize ImageSource::frameSizeAtIndex(size_t index) const
{
IntSize result;
RetainPtr<CFDictionaryRef> properties(AdoptCF, CGImageSourceCopyPropertiesAtIndex(m_decoder, index, imageSourceOptions()));
if (properties) {
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 ENABLE(RESPECT_EXIF_ORIENTATION)
if (!orientationRequiresWidthAndHeightSwapped(orientationAtIndex(index)))
result = IntSize(w, h);
else
result = IntSize(h, w);
#else
result = IntSize(w, h);
#endif
if (!m_isProgressive) {
CFDictionaryRef jfifProperties = (CFDictionaryRef)CFDictionaryGetValue(properties.get(), kCGImagePropertyJFIFDictionary);
if (jfifProperties) {
CFBooleanRef isProgCFBool = (CFBooleanRef)CFDictionaryGetValue(jfifProperties, kCGImagePropertyJFIFIsProgressive);
if (isProgCFBool)
m_isProgressive = CFBooleanGetValue(isProgCFBool);
}
}
if ((m_baseSubsampling == 0) && !m_isProgressive) {
unsigned maximumImageSizeBeforeSubsampling = ImageSource::maximumImageSizeBeforeSubsampling();
while ((m_baseSubsampling < 3) && (static_cast<unsigned>(result.width() * result.height()) > maximumImageSizeBeforeSubsampling)) {
m_baseSubsampling++;
result = size();
}
}
}
return result;
}
#if ENABLE(RESPECT_EXIF_ORIENTATION)
int ImageSource::orientationAtIndex(size_t index) const
{
int orientation = BitmapImage::ImageEXIFOrientationTopLeft;
CFDictionaryRef properties = CGImageSourceCopyPropertiesAtIndex(m_decoder, index, imageSourceOptions());
if (properties) {
CFNumberRef orientationProperty = (CFNumberRef)CFDictionaryGetValue(properties, kCGImagePropertyOrientation);
if (orientationProperty != NULL)
CFNumberGetValue(orientationProperty, kCFNumberIntType, &orientation);
CFRelease(properties);
if (orientation < BitmapImage::ImageEXIFOrientationTopLeft || orientation > BitmapImage::ImageEXIFOrientationLeftBottom)
orientation = BitmapImage::ImageEXIFOrientationTopLeft;
}
return orientation;
}
#endif
IntSize ImageSource::size() const
{
return frameSizeAtIndex(0);
}
bool ImageSource::getHotSpot(IntPoint& hotSpot) const
{
RetainPtr<CFDictionaryRef> properties(AdoptCF, CGImageSourceCopyPropertiesAtIndex(m_decoder, 0, imageSourceOptions()));
if (!properties)
return false;
int x = -1, y = -1;
CFNumberRef num = (CFNumberRef)CFDictionaryGetValue(properties.get(), CFSTR("hotspotX"));
if (!num || !CFNumberGetValue(num, kCFNumberIntType, &x))
return false;
num = (CFNumberRef)CFDictionaryGetValue(properties.get(), CFSTR("hotspotY"));
if (!num || !CFNumberGetValue(num, kCFNumberIntType, &y))
return false;
if (x < 0 || y < 0)
return false;
hotSpot = IntPoint(x, y);
return true;
}
size_t ImageSource::bytesDecodedToDetermineProperties() const
{
return 13088;
}
int ImageSource::repetitionCount()
{
int result = cAnimationLoopOnce; if (!initialized())
return result;
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);
if (!result)
result = cAnimationLoopInfinite;
}
} else
result = cAnimationNone; }
return result;
}
size_t ImageSource::frameCount() const
{
return m_decoder ? CGImageSourceGetCount(m_decoder) : 0;
}
CGImageRef ImageSource::createFrameAtIndex(size_t index, float scaleHint, float* actualScaleOut, ssize_t* bytesOut)
{
if (!initialized())
return 0;
int subsampling = scaleHint < std::numeric_limits<float>::infinity() ? (int)log2f(1.0f / std::max(0.1f, std::min(1.0f, scaleHint))) : -1;
RetainPtr<CGImageRef> image(AdoptCF, CGImageSourceCreateImageAtIndex(m_decoder, index, imageSourceOptions(subsampling)));
CGImageSetCachingFlags(image.get(), kCGImageCachingTemporary);
#if ENABLE(RESPECT_EXIF_ORIENTATION)
*actualScaleOut = static_cast<float>(CGImageGetWidth(image.get())) / (!orientationRequiresWidthAndHeightSwapped(orientationAtIndex(index)) ? size().width() : size().height());
#else
*actualScaleOut = static_cast<float>(CGImageGetWidth(image.get())) / static_cast<float>(size().width()); #endif
*bytesOut = CGImageGetBytesPerRow(image.get()) * CGImageGetHeight(image.get());
CFStringRef imageUTI = CGImageSourceGetType(m_decoder);
static const CFStringRef xbmUTI = CFSTR("public.xbitmap-image");
if (!imageUTI || !CFEqual(imageUTI, xbmUTI))
return image.releaseRef();
const CGFloat maskingColors[6] = {255, 255, 255, 255, 255, 255};
RetainPtr<CGImageRef> maskedImage(AdoptCF, CGImageCreateWithMaskingColors(image.get(), maskingColors));
if (!maskedImage)
return image.releaseRef();
return maskedImage.releaseRef();
}
bool ImageSource::frameIsCompleteAtIndex(size_t index)
{
ASSERT(frameCount());
CGImageSourceStatus frameStatus = CGImageSourceGetStatusAtIndex(m_decoder, index);
if (index < frameCount() - 1)
return frameStatus >= kCGImageStatusIncomplete;
return frameStatus == kCGImageStatusComplete;
}
float ImageSource::frameDurationAtIndex(size_t index)
{
if (!initialized())
return 0;
float duration = 0;
RetainPtr<CFDictionaryRef> properties(AdoptCF, CGImageSourceCopyPropertiesAtIndex(m_decoder, index, imageSourceOptions()));
if (properties) {
CFDictionaryRef typeProperties = (CFDictionaryRef)CFDictionaryGetValue(properties.get(), kCGImagePropertyGIFDictionary);
if (typeProperties) {
if (CFNumberRef num = (CFNumberRef)CFDictionaryGetValue(typeProperties, WebCoreCGImagePropertyGIFUnclampedDelayTime)) {
CFNumberGetValue(num, kCFNumberFloatType, &duration);
} else if (CFNumberRef num = (CFNumberRef)CFDictionaryGetValue(typeProperties, kCGImagePropertyGIFDelayTime)) {
CFNumberGetValue(num, kCFNumberFloatType, &duration);
}
}
}
if (duration < 0.011f)
return 0.100f;
return duration;
}
bool ImageSource::frameHasAlphaAtIndex(size_t)
{
if (!m_decoder)
return false;
CFStringRef imageType = CGImageSourceGetType(m_decoder);
if (!imageType || CFEqual(imageType, CFSTR("public.jpeg")))
return false;
return true;
}
unsigned ImageSource::s_maximumImageSizeBeforeSubsampling = 2 * 1024 * 1024;
unsigned ImageSource::maximumImageSizeBeforeSubsampling()
{
return s_maximumImageSizeBeforeSubsampling;
}
void ImageSource::setMaximumImageSizeBeforeSubsampling(unsigned maximum)
{
s_maximumImageSizeBeforeSubsampling = maximum;
}
}
#endif // USE(CG)