static inline CGColorSpaceRef cachedCGColorSpace(ColorSpace colorSpace)
{
switch (colorSpace) {
case DeviceColorSpace:
return deviceRGBColorSpaceRef();
case sRGBColorSpace:
return sRGBColorSpaceRef();
}
ASSERT_NOT_REACHED();
return deviceRGBColorSpaceRef();
}
static CGColorRef createCGColorWithDeviceRGBA(CGColorRef sourceColor)
{
if (!sourceColor || CFEqual(CGColorGetColorSpace(sourceColor), deviceRGBColorSpaceRef()))
return CGColorRetain(sourceColor);
RetainPtr<CGColorTransformRef> colorTransform = adoptCF(CGColorTransformCreate(deviceRGBColorSpaceRef(), nullptr));
if (!colorTransform)
return CGColorRetain(sourceColor);
// CGColorTransformConvertColor() returns a +1 retained object.
return CGColorTransformConvertColor(colorTransform.get(), sourceColor, kCGRenderingIntentDefault);
}
// FIXME: Is it possible to merge getWindowsContext and createWindowsBitmap into a single API
// suitable for all clients?
void GraphicsContext::releaseWindowsContext(HDC hdc, const IntRect& dstRect, bool supportAlphaBlend, bool mayCreateBitmap)
{
bool createdBitmap = mayCreateBitmap && (!m_data->m_hdc || isInTransparencyLayer());
if (!createdBitmap) {
m_data->restore();
return;
}
if (dstRect.isEmpty())
return;
OwnPtr<HBITMAP> bitmap = adoptPtr(static_cast<HBITMAP>(GetCurrentObject(hdc, OBJ_BITMAP)));
DIBPixelData pixelData(bitmap.get());
ASSERT(pixelData.bitsPerPixel() == 32);
CGContextRef bitmapContext = CGBitmapContextCreate(pixelData.buffer(), pixelData.size().width(), pixelData.size().height(), 8,
pixelData.bytesPerRow(), deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Little |
(supportAlphaBlend ? kCGImageAlphaPremultipliedFirst : kCGImageAlphaNoneSkipFirst));
CGImageRef image = CGBitmapContextCreateImage(bitmapContext);
CGContextDrawImage(m_data->m_cgContext.get(), dstRect, image);
// Delete all our junk.
CGImageRelease(image);
CGContextRelease(bitmapContext);
::DeleteDC(hdc);
}
static CGContextRef CGContextWithHDC(HDC hdc, bool hasAlpha)
{
HBITMAP bitmap = static_cast<HBITMAP>(GetCurrentObject(hdc, OBJ_BITMAP));
DIBPixelData pixelData(bitmap);
// FIXME: We can get here because we asked for a bitmap that is too big
// when we have a tiled layer and we're compositing. In that case
// bmBitsPixel will be 0. This seems to be benign, so for now we will
// exit gracefully and look at it later:
// https://bugs.webkit.org/show_bug.cgi?id=52041
// ASSERT(bitmapBits.bitsPerPixel() == 32);
if (pixelData.bitsPerPixel() != 32)
return 0;
CGBitmapInfo bitmapInfo = kCGBitmapByteOrder32Little | (hasAlpha ? kCGImageAlphaPremultipliedFirst : kCGImageAlphaNoneSkipFirst);
CGContextRef context = CGBitmapContextCreate(pixelData.buffer(), pixelData.size().width(), pixelData.size().height(), 8,
pixelData.bytesPerRow(), deviceRGBColorSpaceRef(), bitmapInfo);
// Flip coords
CGContextTranslateCTM(context, 0, pixelData.size().height());
CGContextScaleCTM(context, 1, -1);
// Put the HDC In advanced mode so it will honor affine transforms.
SetGraphicsMode(hdc, GM_ADVANCED);
return context;
}
CGGradientRef Gradient::platformGradient()
{
if (m_gradient)
return m_gradient;
sortStopsIfNecessary();
const int cReservedStops = 3;
Vector<CGFloat, 4 * cReservedStops> colorComponents;
colorComponents.reserveInitialCapacity(m_stops.size() * 4); // RGBA components per stop
Vector<CGFloat, cReservedStops> locations;
locations.reserveInitialCapacity(m_stops.size());
for (size_t i = 0; i < m_stops.size(); ++i) {
colorComponents.uncheckedAppend(m_stops[i].red);
colorComponents.uncheckedAppend(m_stops[i].green);
colorComponents.uncheckedAppend(m_stops[i].blue);
colorComponents.uncheckedAppend(m_stops[i].alpha);
locations.uncheckedAppend(m_stops[i].stop);
}
m_gradient = CGGradientCreateWithColorComponents(deviceRGBColorSpaceRef(), colorComponents.data(), locations.data(), m_stops.size());
return m_gradient;
}
bool BitmapImage::getHBITMAPOfSize(HBITMAP bmp, LPSIZE size)
{
ASSERT(bmp);
BITMAP bmpInfo;
GetObject(bmp, sizeof(BITMAP), &bmpInfo);
ASSERT(bmpInfo.bmBitsPixel == 32);
int bufferSize = bmpInfo.bmWidthBytes * bmpInfo.bmHeight;
CGContextRef cgContext = CGBitmapContextCreate(bmpInfo.bmBits, bmpInfo.bmWidth, bmpInfo.bmHeight,
8, bmpInfo.bmWidthBytes, deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst);
GraphicsContext gc(cgContext);
IntSize imageSize = BitmapImage::size();
if (size)
drawFrameMatchingSourceSize(&gc, FloatRect(0.0f, 0.0f, bmpInfo.bmWidth, bmpInfo.bmHeight), IntSize(*size), ColorSpaceDeviceRGB, CompositeCopy);
else
draw(&gc, FloatRect(0.0f, 0.0f, bmpInfo.bmWidth, bmpInfo.bmHeight), FloatRect(0.0f, 0.0f, imageSize.width(), imageSize.height()), ColorSpaceDeviceRGB, CompositeCopy);
// Do cleanup
CGContextRelease(cgContext);
return true;
}
static HBITMAP imageFromRect(const Frame* frame, IntRect& ir)
{
PaintBehavior oldPaintBehavior = frame->view()->paintBehavior();
frame->view()->setPaintBehavior(oldPaintBehavior | PaintBehaviorFlattenCompositingLayers);
void* bits;
HDC hdc = CreateCompatibleDC(0);
int w = ir.width();
int h = ir.height();
BitmapInfo bmp = BitmapInfo::create(IntSize(w, h));
HBITMAP hbmp = CreateDIBSection(0, &bmp, DIB_RGB_COLORS, static_cast<void**>(&bits), 0, 0);
HBITMAP hbmpOld = static_cast<HBITMAP>(SelectObject(hdc, hbmp));
CGContextRef context = CGBitmapContextCreate(static_cast<void*>(bits), w, h,
8, w * sizeof(RGBQUAD), deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst);
CGContextSaveGState(context);
GraphicsContext gc(context);
drawRectIntoContext(ir, frame->view(), &gc);
CGContextRelease(context);
SelectObject(hdc, hbmpOld);
DeleteDC(hdc);
frame->view()->setPaintBehavior(oldPaintBehavior);
return hbmp;
}
ImageBuffer::ImageBuffer(const IntSize& size, ColorSpace imageColorSpace, RenderingMode renderingMode, bool& success)
: m_data(size)
, m_size(size)
, m_accelerateRendering(renderingMode == Accelerated)
{
#if !USE(IOSURFACE_CANVAS_BACKING_STORE)
ASSERT(renderingMode == Unaccelerated);
#endif
success = false; // Make early return mean failure.
if (size.width() < 0 || size.height() < 0)
return;
unsigned bytesPerRow = size.width();
if (bytesPerRow > 0x3FFFFFFF) // Protect against overflow
return;
bytesPerRow *= 4;
m_data.m_bytesPerRow = bytesPerRow;
size_t dataSize = size.height() * bytesPerRow;
switch (imageColorSpace) {
case ColorSpaceDeviceRGB:
m_data.m_colorSpace = deviceRGBColorSpaceRef();
break;
case ColorSpaceSRGB:
m_data.m_colorSpace = sRGBColorSpaceRef();
break;
case ColorSpaceLinearRGB:
m_data.m_colorSpace = linearRGBColorSpaceRef();
break;
}
RetainPtr<CGContextRef> cgContext;
if (!m_accelerateRendering) {
if (!tryFastCalloc(size.height(), bytesPerRow).getValue(m_data.m_data))
return;
ASSERT(!(reinterpret_cast<size_t>(m_data.m_data) & 2));
m_data.m_bitmapInfo = kCGImageAlphaPremultipliedLast;
cgContext.adoptCF(CGBitmapContextCreate(m_data.m_data, size.width(), size.height(), 8, bytesPerRow, m_data.m_colorSpace, m_data.m_bitmapInfo));
// Create a live image that wraps the data.
m_data.m_dataProvider.adoptCF(CGDataProviderCreateWithData(0, m_data.m_data, dataSize, releaseImageData));
} else {
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
m_data.m_surface = createIOSurface(size);
cgContext.adoptCF(wkIOSurfaceContextCreate(m_data.m_surface.get(), size.width(), size.height(), m_data.m_colorSpace));
#else
m_accelerateRendering = false; // Force to false on older platforms
#endif
}
if (!cgContext)
return;
m_context.set(new GraphicsContext(cgContext.get()));
m_context->scale(FloatSize(1, -1));
m_context->translate(0, -size.height());
success = true;
}
static CGContextRef createCgContextFromBitmap(HBITMAP bitmap)
{
BITMAP info;
GetObject(bitmap, sizeof(info), &info);
ASSERT(info.bmBitsPixel == 32);
CGContextRef bitmapContext = CGBitmapContextCreate(info.bmBits, info.bmWidth, info.bmHeight, 8,
info.bmWidthBytes, deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipFirst);
return bitmapContext;
}
CGColorSpaceRef linearRGBColorSpaceRef()
{
// FIXME: Windows should be able to use kCGColorSpaceGenericRGBLinear, this is tracked by http://webkit.org/b/31363.
#if PLATFORM(WIN) || defined(BUILDING_ON_TIGER)
return deviceRGBColorSpaceRef();
#else
static CGColorSpaceRef linearRGBSpace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGBLinear);
return linearRGBSpace;
#endif
}
static CGColorSpaceRef createColorSpace(const ColorProfile& colorProfile)
{
RetainPtr<CFDataRef> data(AdoptCF, CFDataCreate(kCFAllocatorDefault, reinterpret_cast<const UInt8*>(colorProfile.data()), colorProfile.size()));
#ifndef TARGETING_LEOPARD
return CGColorSpaceCreateWithICCProfile(data.get());
#else
RetainPtr<CGDataProviderRef> profileDataProvider(AdoptCF, CGDataProviderCreateWithCFData(data.get()));
CGFloat ranges[] = {0.0, 255.0, 0.0, 255.0, 0.0, 255.0};
return CGColorSpaceCreateICCBased(3, ranges, profileDataProvider.get(), deviceRGBColorSpaceRef());
#endif
}
String ImageDataToDataURL(const ImageData& source, const String& mimeType, const double* quality)
{
ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
RetainPtr<CFStringRef> uti = utiFromMIMEType(mimeType);
ASSERT(uti);
CGImageAlphaInfo dataAlphaInfo = kCGImageAlphaLast;
unsigned char* data = source.data()->data();
Vector<uint8_t> premultipliedData;
if (CFEqual(uti.get(), jpegUTI())) {
// JPEGs don't have an alpha channel, so we have to manually composite on top of black.
size_t size = 4 * source.width() * source.height();
if (!premultipliedData.tryReserveCapacity(size))
return "data:,";
premultipliedData.resize(size);
unsigned char *buffer = premultipliedData.data();
for (size_t i = 0; i < size; i += 4) {
unsigned alpha = data[i + 3];
if (alpha != 255) {
buffer[i + 0] = data[i + 0] * alpha / 255;
buffer[i + 1] = data[i + 1] * alpha / 255;
buffer[i + 2] = data[i + 2] * alpha / 255;
} else {
buffer[i + 0] = data[i + 0];
buffer[i + 1] = data[i + 1];
buffer[i + 2] = data[i + 2];
}
}
dataAlphaInfo = kCGImageAlphaNoneSkipLast; // Ignore the alpha channel.
data = premultipliedData.data();
}
RetainPtr<CGDataProviderRef> dataProvider;
dataProvider = adoptCF(CGDataProviderCreateWithData(0, data, 4 * source.width() * source.height(), 0));
if (!dataProvider)
return "data:,";
RetainPtr<CGImageRef> image;
image = adoptCF(CGImageCreate(source.width(), source.height(), 8, 32, 4 * source.width(),
deviceRGBColorSpaceRef(), kCGBitmapByteOrderDefault | dataAlphaInfo,
dataProvider.get(), 0, false, kCGRenderingIntentDefault));
return CGImageToDataURL(image.get(), mimeType, quality);
}
String ImageDataToDataURL(const ImageData& source, const String& mimeType, const double* quality)
{
ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
RetainPtr<CFStringRef> uti = utiFromMIMEType(mimeType);
ASSERT(uti);
unsigned char* data = source.data()->data();
Vector<uint8_t> dataVector;
if (CFEqual(uti.get(), jpegUTI())) {
// JPEGs don't have an alpha channel, so we have to manually composite on top of black.
dataVector.resize(4 * source.width() * source.height());
unsigned char *out = dataVector.data();
for (int i = 0; i < source.width() * source.height(); i++) {
// Multiply color data by alpha, and set alpha to 255.
int alpha = data[4 * i + 3];
if (alpha != 255) {
out[4 * i + 0] = data[4 * i + 0] * alpha / 255;
out[4 * i + 1] = data[4 * i + 1] * alpha / 255;
out[4 * i + 2] = data[4 * i + 2] * alpha / 255;
} else {
out[4 * i + 0] = data[4 * i + 0];
out[4 * i + 1] = data[4 * i + 1];
out[4 * i + 2] = data[4 * i + 2];
}
out[4 * i + 3] = 255;
}
data = out;
}
RetainPtr<CGDataProviderRef> dataProvider;
dataProvider.adoptCF(CGDataProviderCreateWithData(0, data, 4 * source.width() * source.height(), 0));
if (!dataProvider)
return "data:,";
RetainPtr<CGImageRef> image;
image.adoptCF(CGImageCreate(source.width(), source.height(), 8, 32, 4 * source.width(),
deviceRGBColorSpaceRef(), kCGBitmapByteOrderDefault | kCGImageAlphaLast,
dataProvider.get(), 0, false, kCGRenderingIntentDefault));
return CGImageToDataURL(image.get(), mimeType, quality);
}
CGShadingRef Gradient::platformGradient()
{
if (m_gradient)
return m_gradient;
const CGFloat intervalRanges[2] = { 0, 1 };
const CGFloat colorComponentRanges[4 * 2] = { 0, 1, 0, 1, 0, 1, 0, 1 };
const CGFunctionCallbacks gradientCallbacks = { 0, gradientCallback, 0 };
RetainPtr<CGFunctionRef> colorFunction(AdoptCF, CGFunctionCreate(this, 1, intervalRanges, 4, colorComponentRanges, &gradientCallbacks));
CGColorSpaceRef colorSpace = deviceRGBColorSpaceRef();
if (m_radial)
m_gradient = CGShadingCreateRadial(colorSpace, m_p0, m_r0, m_p1, m_r1, colorFunction.get(), true, true);
else
m_gradient = CGShadingCreateAxial(colorSpace, m_p0, m_p1, colorFunction.get(), true, true);
return m_gradient;
}
static RetainPtr<CGImageRef> imageWithColorSpace(CGImageRef originalImage, ColorSpace colorSpace)
{
CGColorSpaceRef originalColorSpace = CGImageGetColorSpace(originalImage);
// If the image already has a (non-device) color space, we don't want to
// override it, so return.
if (!originalColorSpace || !CFEqual(originalColorSpace, deviceRGBColorSpaceRef()))
return originalImage;
switch (colorSpace) {
case DeviceColorSpace:
return originalImage;
case sRGBColorSpace:
return RetainPtr<CGImageRef>(AdoptCF, CGImageCreateCopyWithColorSpace(originalImage, sRGBColorSpaceRef()));
}
ASSERT_NOT_REACHED();
return originalImage;
}
String ImageBuffer::toDataURL(const String& mimeType, const double* quality, CoordinateSystem) const
{
ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
if (context().isAcceleratedContext())
flushContext();
RetainPtr<CFStringRef> uti = utiFromMIMEType(mimeType);
ASSERT(uti);
RefPtr<Uint8ClampedArray> premultipliedData;
RetainPtr<CGImageRef> image;
if (CFEqual(uti.get(), jpegUTI())) {
// JPEGs don't have an alpha channel, so we have to manually composite on top of black.
premultipliedData = getPremultipliedImageData(IntRect(IntPoint(0, 0), logicalSize()));
if (!premultipliedData)
return "data:,";
RetainPtr<CGDataProviderRef> dataProvider;
dataProvider = adoptCF(CGDataProviderCreateWithData(0, premultipliedData->data(), 4 * logicalSize().width() * logicalSize().height(), 0));
if (!dataProvider)
return "data:,";
image = adoptCF(CGImageCreate(logicalSize().width(), logicalSize().height(), 8, 32, 4 * logicalSize().width(),
deviceRGBColorSpaceRef(), kCGBitmapByteOrderDefault | kCGImageAlphaNoneSkipLast,
dataProvider.get(), 0, false, kCGRenderingIntentDefault));
} else if (m_resolutionScale == 1) {
image = copyNativeImage(CopyBackingStore);
image = createCroppedImageIfNecessary(image.get(), internalSize());
} else {
image = copyNativeImage(DontCopyBackingStore);
RetainPtr<CGContextRef> context = adoptCF(CGBitmapContextCreate(0, logicalSize().width(), logicalSize().height(), 8, 4 * logicalSize().width(), deviceRGBColorSpaceRef(), kCGImageAlphaPremultipliedLast));
CGContextSetBlendMode(context.get(), kCGBlendModeCopy);
CGContextClipToRect(context.get(), CGRectMake(0, 0, logicalSize().width(), logicalSize().height()));
FloatSize imageSizeInUserSpace = scaleSizeToUserSpace(logicalSize(), m_data.backingStoreSize, internalSize());
CGContextDrawImage(context.get(), CGRectMake(0, 0, imageSizeInUserSpace.width(), imageSizeInUserSpace.height()), image.get());
image = adoptCF(CGBitmapContextCreateImage(context.get()));
}
return CGImageToDataURL(image.get(), mimeType, quality);
}
PassRefPtr<BitmapImage> BitmapImage::create(HBITMAP hBitmap)
{
DIBSECTION dibSection;
if (!GetObject(hBitmap, sizeof(DIBSECTION), &dibSection))
return 0;
ASSERT(dibSection.dsBm.bmBitsPixel == 32);
if (dibSection.dsBm.bmBitsPixel != 32)
return 0;
ASSERT(dibSection.dsBm.bmBits);
if (!dibSection.dsBm.bmBits)
return 0;
RetainPtr<CGContextRef> bitmapContext(AdoptCF, CGBitmapContextCreate(dibSection.dsBm.bmBits, dibSection.dsBm.bmWidth, dibSection.dsBm.bmHeight, 8,
dibSection.dsBm.bmWidthBytes, deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst));
// The BitmapImage takes ownership of this.
CGImageRef cgImage = CGBitmapContextCreateImage(bitmapContext.get());
return adoptRef(new BitmapImage(cgImage));
}
static void resolveColorSpace(const SkBitmap& bitmap, CGColorSpaceRef colorSpace)
{
int width = bitmap.width();
int height = bitmap.height();
CGImageRef srcImage = SkCreateCGImageRefWithColorspace(bitmap, colorSpace);
SkAutoLockPixels lock(bitmap);
void* pixels = bitmap.getPixels();
RetainPtr<CGContextRef> cgBitmap(AdoptCF, CGBitmapContextCreate(pixels, width, height, 8, width * 4, deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Host | kCGImageAlphaPremultipliedFirst));
if (!cgBitmap)
return;
CGContextSetBlendMode(cgBitmap.get(), kCGBlendModeCopy);
CGRect bounds = { {0, 0}, {width, height} };
CGContextDrawImage(cgBitmap.get(), bounds, srcImage);
}
RefPtr<Image> ImageBuffer::copyImage(BackingStoreCopy copyBehavior, ScaleBehavior scaleBehavior) const
{
RetainPtr<CGImageRef> image;
if (m_resolutionScale == 1 || scaleBehavior == Unscaled) {
image = copyNativeImage(copyBehavior);
image = createCroppedImageIfNecessary(image.get(), internalSize());
} else {
image = copyNativeImage(DontCopyBackingStore);
RetainPtr<CGContextRef> context = adoptCF(CGBitmapContextCreate(0, logicalSize().width(), logicalSize().height(), 8, 4 * logicalSize().width(), deviceRGBColorSpaceRef(), kCGImageAlphaPremultipliedLast));
CGContextSetBlendMode(context.get(), kCGBlendModeCopy);
CGContextClipToRect(context.get(), FloatRect(FloatPoint::zero(), logicalSize()));
FloatSize imageSizeInUserSpace = scaleSizeToUserSpace(logicalSize(), m_data.backingStoreSize, internalSize());
CGContextDrawImage(context.get(), FloatRect(FloatPoint::zero(), imageSizeInUserSpace), image.get());
image = adoptCF(CGBitmapContextCreateImage(context.get()));
}
if (!image)
return nullptr;
return BitmapImage::create(image.get());
}
void BitmapImage::checkForSolidColor()
{
m_checkedForSolidColor = true;
if (frameCount() > 1) {
m_isSolidColor = false;
return;
}
CGImageRef image = frameAtIndex(0);
// Currently we only check for solid color in the important special case of a 1x1 image.
if (image && CGImageGetWidth(image) == 1 && CGImageGetHeight(image) == 1) {
unsigned char pixel[4]; // RGBA
RetainPtr<CGContextRef> bmap(AdoptCF, CGBitmapContextCreate(pixel, 1, 1, 8, sizeof(pixel), deviceRGBColorSpaceRef(),
kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big));
if (!bmap)
return;
GraphicsContext(bmap.get()).setCompositeOperation(CompositeCopy);
CGRect dst = { {0, 0}, {1, 1} };
CGContextDrawImage(bmap.get(), dst, image);
if (pixel[3] == 0)
m_solidColor = Color(0, 0, 0, 0);
else
m_solidColor = Color(pixel[0] * 255 / pixel[3], pixel[1] * 255 / pixel[3], pixel[2] * 255 / pixel[3], pixel[3]);
m_isSolidColor = true;
}
}
ImageBuffer::ImageBuffer(const IntSize& size, ColorSpace imageColorSpace, RenderingMode renderingMode, bool& success)
: m_data(size)
, m_size(size)
, m_accelerateRendering(renderingMode == Accelerated)
{
success = false; // Make early return mean failure.
if (size.width() <= 0 || size.height() <= 0)
return;
Checked<int, RecordOverflow> width = size.width();
Checked<int, RecordOverflow> height = size.height();
// Prevent integer overflows
m_data.m_bytesPerRow = 4 * width;
Checked<size_t, RecordOverflow> dataSize = height * m_data.m_bytesPerRow;
if (dataSize.hasOverflowed())
return;
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
if (width.unsafeGet() >= maxIOSurfaceDimension || height.unsafeGet() >= maxIOSurfaceDimension || (width * height).unsafeGet() < minIOSurfaceArea)
m_accelerateRendering = false;
#else
ASSERT(renderingMode == Unaccelerated);
#endif
switch (imageColorSpace) {
case ColorSpaceDeviceRGB:
m_data.m_colorSpace = deviceRGBColorSpaceRef();
break;
case ColorSpaceSRGB:
m_data.m_colorSpace = sRGBColorSpaceRef();
break;
case ColorSpaceLinearRGB:
m_data.m_colorSpace = linearRGBColorSpaceRef();
break;
}
RetainPtr<CGContextRef> cgContext;
if (m_accelerateRendering) {
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
m_data.m_surface = createIOSurface(size);
cgContext.adoptCF(wkIOSurfaceContextCreate(m_data.m_surface.get(), width.unsafeGet(), height.unsafeGet(), m_data.m_colorSpace));
#endif
if (!cgContext)
m_accelerateRendering = false; // If allocation fails, fall back to non-accelerated path.
}
if (!m_accelerateRendering) {
if (!tryFastCalloc(height.unsafeGet(), m_data.m_bytesPerRow.unsafeGet()).getValue(m_data.m_data))
return;
ASSERT(!(reinterpret_cast<size_t>(m_data.m_data) & 2));
#if USE_ARGB32
m_data.m_bitmapInfo = kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host;
#else
m_data.m_bitmapInfo = kCGImageAlphaPremultipliedLast;
#endif
cgContext.adoptCF(CGBitmapContextCreate(m_data.m_data, width.unsafeGet(), height.unsafeGet(), 8, m_data.m_bytesPerRow.unsafeGet(), m_data.m_colorSpace, m_data.m_bitmapInfo));
// Create a live image that wraps the data.
m_data.m_dataProvider.adoptCF(CGDataProviderCreateWithData(0, m_data.m_data, dataSize.unsafeGet(), releaseImageData));
}
if (!cgContext)
return;
m_context= adoptPtr(new GraphicsContext(cgContext.get()));
m_context->scale(FloatSize(1, -1));
m_context->translate(0, -height.unsafeGet());
success = true;
}
void GraphicsContext::drawWindowsBitmap(WindowsBitmap* image, const IntPoint& point)
{
// FIXME: Creating CFData is non-optimal, but needed to avoid crashing when printing. Ideally we should
// make a custom CGDataProvider that controls the WindowsBitmap lifetime. see <rdar://6394455>
RetainPtr<CFDataRef> imageData = adoptCF(CFDataCreate(kCFAllocatorDefault, image->buffer(), image->bufferLength()));
RetainPtr<CGDataProviderRef> dataProvider = adoptCF(CGDataProviderCreateWithCFData(imageData.get()));
RetainPtr<CGImageRef> cgImage = adoptCF(CGImageCreate(image->size().width(), image->size().height(), 8, 32, image->bytesPerRow(), deviceRGBColorSpaceRef(),
kCGBitmapByteOrder32Little | kCGImageAlphaFirst, dataProvider.get(), 0, true, kCGRenderingIntentDefault));
CGContextDrawImage(m_data->m_cgContext.get(), CGRectMake(point.x(), point.y(), image->size().width(), image->size().height()), cgImage.get());
}
void BitmapImage::checkForSolidColor()
{
m_checkedForSolidColor = true;
if (frameCount() > 1) {
m_isSolidColor = false;
return;
}
#if !PLATFORM(IOS)
CGImageRef image = frameAtIndex(0);
#else
// Note, checkForSolidColor() may be called from frameAtIndex(). On iOS frameAtIndex() gets passed a scaleHint
// argument which it uses to tell CG to create a scaled down image. Since we don't know the scaleHint here, if
// we call frameAtIndex() again, we would pass it the default scale of 1 and would end up recreating the image.
// So we do a quick check and call frameAtIndex(0) only if we haven't yet created an image.
CGImageRef image = nullptr;
if (m_frames.size())
image = m_frames[0].m_frame;
if (!image)
image = frameAtIndex(0);
#endif
// Currently we only check for solid color in the important special case of a 1x1 image.
if (image && CGImageGetWidth(image) == 1 && CGImageGetHeight(image) == 1) {
unsigned char pixel[4]; // RGBA
RetainPtr<CGContextRef> bitmapContext = adoptCF(CGBitmapContextCreate(pixel, 1, 1, 8, sizeof(pixel), deviceRGBColorSpaceRef(),
kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big));
if (!bitmapContext)
return;
GraphicsContext(bitmapContext.get()).setCompositeOperation(CompositeCopy);
CGRect destinationRect = CGRectMake(0, 0, 1, 1);
CGContextDrawImage(bitmapContext.get(), destinationRect, image);
if (!pixel[3])
m_solidColor = Color(0, 0, 0, 0);
else
m_solidColor = Color(pixel[0] * 255 / pixel[3], pixel[1] * 255 / pixel[3], pixel[2] * 255 / pixel[3], pixel[3]);
m_isSolidColor = true;
}
}
void BitmapImage::checkForSolidColor()
{
m_checkedForSolidColor = true;
m_isSolidColor = false;
if (frameCount() > 1)
return;
if (!haveFrameAtIndex(0)) {
IntSize size = m_source.frameSizeAtIndex(0, 0);
if (size.width() != 1 || size.height() != 1)
return;
if (!ensureFrameIsCached(0))
return;
}
CGImageRef image = nullptr;
if (m_frames.size())
image = m_frames[0].m_frame;
if (!image)
return;
// Currently we only check for solid color in the important special case of a 1x1 image.
if (CGImageGetWidth(image) == 1 && CGImageGetHeight(image) == 1) {
unsigned char pixel[4]; // RGBA
RetainPtr<CGContextRef> bitmapContext = adoptCF(CGBitmapContextCreate(pixel, 1, 1, 8, sizeof(pixel), deviceRGBColorSpaceRef(),
kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big));
if (!bitmapContext)
return;
GraphicsContext(bitmapContext.get()).setCompositeOperation(CompositeCopy);
CGRect destinationRect = CGRectMake(0, 0, 1, 1);
CGContextDrawImage(bitmapContext.get(), destinationRect, image);
if (!pixel[3])
m_solidColor = Color(0, 0, 0, 0);
else
m_solidColor = Color(pixel[0] * 255 / pixel[3], pixel[1] * 255 / pixel[3], pixel[2] * 255 / pixel[3], pixel[3]);
m_isSolidColor = true;
}
}
PassRefPtr<Image> ImageBuffer::copyImage(BackingStoreCopy copyBehavior) const
{
RetainPtr<CGImageRef> image;
if (m_resolutionScale == 1)
image = copyNativeImage(copyBehavior);
else {
image.adoptCF(copyNativeImage(DontCopyBackingStore));
RetainPtr<CGContextRef> context(AdoptCF, CGBitmapContextCreate(0, logicalSize().width(), logicalSize().height(), 8, 4 * logicalSize().width(), deviceRGBColorSpaceRef(), kCGImageAlphaPremultipliedLast));
CGContextSetBlendMode(context.get(), kCGBlendModeCopy);
CGContextDrawImage(context.get(), CGRectMake(0, 0, logicalSize().width(), logicalSize().height()), image.get());
image = CGBitmapContextCreateImage(context.get());
}
if (!image)
return 0;
return BitmapImage::create(image.get());
}
ImageBuffer::ImageBuffer(const IntSize& size, ColorSpace imageColorSpace, RenderingMode renderingMode, DeferralMode, bool& success)
: m_data(size) // NOTE: The input here isn't important as ImageBufferDataCG's constructor just ignores it.
, m_size(size)
{
success = false; // Make early return mean failure.
bool accelerateRendering = renderingMode == Accelerated;
if (size.width() <= 0 || size.height() <= 0)
return;
Checked<int, RecordOverflow> width = size.width();
Checked<int, RecordOverflow> height = size.height();
// Prevent integer overflows
m_data.m_bytesPerRow = 4 * width;
Checked<size_t, RecordOverflow> numBytes = height * m_data.m_bytesPerRow;
if (numBytes.hasOverflowed())
return;
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
if (width.unsafeGet() >= maxIOSurfaceDimension || height.unsafeGet() >= maxIOSurfaceDimension || (width * height).unsafeGet() < minIOSurfaceArea)
accelerateRendering = false;
#else
ASSERT(renderingMode == Unaccelerated);
#endif
switch (imageColorSpace) {
case ColorSpaceDeviceRGB:
m_data.m_colorSpace = deviceRGBColorSpaceRef();
break;
case ColorSpaceSRGB:
m_data.m_colorSpace = sRGBColorSpaceRef();
break;
case ColorSpaceLinearRGB:
m_data.m_colorSpace = linearRGBColorSpaceRef();
break;
}
RetainPtr<CGContextRef> cgContext;
if (accelerateRendering) {
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
m_data.m_surface = createIOSurface(size);
cgContext.adoptCF(wkIOSurfaceContextCreate(m_data.m_surface.get(), width.unsafeGet(), height.unsafeGet(), m_data.m_colorSpace));
#endif
if (!cgContext)
accelerateRendering = false; // If allocation fails, fall back to non-accelerated path.
}
if (!accelerateRendering) {
if (!tryFastCalloc(height.unsafeGet(), m_data.m_bytesPerRow.unsafeGet()).getValue(m_data.m_data))
return;
ASSERT(!(reinterpret_cast<size_t>(m_data.m_data) & 2));
m_data.m_bitmapInfo = kCGImageAlphaPremultipliedLast;
cgContext.adoptCF(CGBitmapContextCreate(m_data.m_data, width.unsafeGet(), height.unsafeGet(), 8, m_data.m_bytesPerRow.unsafeGet(), m_data.m_colorSpace, m_data.m_bitmapInfo));
// Create a live image that wraps the data.
m_data.m_dataProvider.adoptCF(CGDataProviderCreateWithData(0, m_data.m_data, numBytes.unsafeGet(), releaseImageData));
}
if (!cgContext)
return;
m_context = adoptPtr(new GraphicsContext(cgContext.get()));
m_context->scale(FloatSize(1, -1));
m_context->translate(0, -height.unsafeGet());
m_context->setIsAcceleratedContext(accelerateRendering);
#if defined(BUILDING_ON_LION)
m_data.m_lastFlushTime = currentTimeMS();
#endif
success = true;
}
HBITMAP allocImage(HDC dc, IntSize size, CGContextRef *targetRef)
{
BitmapInfo bmpInfo = BitmapInfo::create(size);
LPVOID bits;
HBITMAP hbmp = CreateDIBSection(dc, &bmpInfo, DIB_RGB_COLORS, &bits, 0, 0);
if (!targetRef)
return hbmp;
CGContextRef bitmapContext = CGBitmapContextCreate(bits, bmpInfo.bmiHeader.biWidth, bmpInfo.bmiHeader.biHeight, 8,
bmpInfo.bmiHeader.biWidth * 4, deviceRGBColorSpaceRef(),
kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipFirst);
if (!bitmapContext) {
DeleteObject(hbmp);
return 0;
}
*targetRef = bitmapContext;
return hbmp;
}