auto_ptr<ImageBuffer> ImageBuffer::create(const IntSize& size, bool grayScale)
{
if (size.width() < 0 || size.height() < 0)
return auto_ptr<ImageBuffer>();
unsigned int bytesPerRow = size.width();
if (!grayScale) {
// Protect against overflow
if (bytesPerRow > 0x3FFFFFFF)
return auto_ptr<ImageBuffer>();
bytesPerRow *= 4;
}
void* imageBuffer = tryFastCalloc(size.height(), bytesPerRow);
if (!imageBuffer)
return auto_ptr<ImageBuffer>();
CGColorSpaceRef colorSpace = grayScale ? CGColorSpaceCreateDeviceGray() : CGColorSpaceCreateDeviceRGB();
CGContextRef cgContext = CGBitmapContextCreate(imageBuffer, size.width(), size.height(), 8, bytesPerRow,
colorSpace, grayScale ? kCGImageAlphaNone : kCGImageAlphaPremultipliedLast);
CGColorSpaceRelease(colorSpace);
if (!cgContext) {
fastFree(imageBuffer);
return auto_ptr<ImageBuffer>();
}
auto_ptr<GraphicsContext> context(new GraphicsContext(cgContext));
context->scale(FloatSize(1, -1));
context->translate(0, -size.height());
CGContextRelease(cgContext);
return auto_ptr<ImageBuffer>(new ImageBuffer(imageBuffer, size, context));
}
ImageBuffer::ImageBuffer(const IntSize& size, bool grayScale, bool& success)
: m_data(size)
, m_size(size)
{
success = false; // Make early return mean failure.
unsigned bytesPerRow;
if (size.width() < 0 || size.height() < 0)
return;
bytesPerRow = size.width();
if (!grayScale) {
// Protect against overflow
if (bytesPerRow > 0x3FFFFFFF)
return;
bytesPerRow *= 4;
}
m_data.m_data = tryFastCalloc(size.height(), bytesPerRow);
ASSERT((reinterpret_cast<size_t>(m_data.m_data) & 2) == 0);
CGColorSpaceRef colorSpace = grayScale ? CGColorSpaceCreateDeviceGray() : CGColorSpaceCreateDeviceRGB();
CGContextRef cgContext = CGBitmapContextCreate(m_data.m_data, size.width(), size.height(), 8, bytesPerRow,
colorSpace, grayScale ? kCGImageAlphaNone : kCGImageAlphaPremultipliedLast);
CGColorSpaceRelease(colorSpace);
if (!cgContext)
return;
m_context.set(new GraphicsContext(cgContext));
m_context->scale(FloatSize(1, -1));
m_context->translate(0, -size.height());
CGContextRelease(cgContext);
success = true;
}
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;
}
Signature* Signature::create(SignatureArgCount argumentCount)
{
// Hashing relies on allocation zero-initializing trailing elements.
auto allocated = tryFastCalloc(allocatedSize(argumentCount), 1);
Signature* signature;
if (!allocated.getValue(signature))
return nullptr;
new (signature) Signature(argumentCount);
return signature;
}
JSArrayBufferView::ConstructionContext::ConstructionContext(
VM& vm, Structure* structure, uint32_t length, uint32_t elementSize,
InitializationMode mode)
: m_structure(0)
, m_length(length)
, m_butterfly(0)
{
if (length <= fastSizeLimit) {
// Attempt GC allocation.
void* temp = 0;
size_t size = sizeOf(length, elementSize);
// CopiedSpace only allows non-zero size allocations.
if (size && !vm.heap.tryAllocateStorage(0, size, &temp))
return;
m_structure = structure;
m_vector = temp;
m_mode = FastTypedArray;
#if USE(JSVALUE32_64)
if (mode == ZeroFill) {
uint64_t* asWords = static_cast<uint64_t*>(m_vector);
for (unsigned i = size / sizeof(uint64_t); i--;)
asWords[i] = 0;
}
#endif // USE(JSVALUE32_64)
return;
}
// Don't allow a typed array to use more than 2GB.
if (length > static_cast<unsigned>(INT_MAX) / elementSize)
return;
if (mode == ZeroFill) {
if (!tryFastCalloc(length, elementSize).getValue(m_vector))
return;
} else {
if (!tryFastMalloc(length * elementSize).getValue(m_vector))
return;
}
vm.heap.reportExtraMemoryCost(static_cast<size_t>(length) * elementSize);
m_structure = structure;
m_mode = OversizeTypedArray;
}
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;
}
ImageBuffer::ImageBuffer(const FloatSize& size, float resolutionScale, ColorSpace imageColorSpace, RenderingMode renderingMode, bool& success)
: m_logicalSize(size)
, m_resolutionScale(resolutionScale)
{
float scaledWidth = ceilf(resolutionScale * size.width());
float scaledHeight = ceilf(resolutionScale * size.height());
// FIXME: Should we automatically use a lower resolution?
if (!FloatSize(scaledWidth, scaledHeight).isExpressibleAsIntSize())
return;
m_size = IntSize(scaledWidth, scaledHeight);
m_data.backingStoreSize = m_size;
success = false; // Make early return mean failure.
bool accelerateRendering = renderingMode == Accelerated;
if (m_size.width() <= 0 || m_size.height() <= 0)
return;
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
Checked<int, RecordOverflow> width = m_size.width();
Checked<int, RecordOverflow> height = m_size.height();
#endif
// Prevent integer overflows
m_data.bytesPerRow = 4 * Checked<unsigned, RecordOverflow>(m_data.backingStoreSize.width());
Checked<size_t, RecordOverflow> numBytes = Checked<unsigned, RecordOverflow>(m_data.backingStoreSize.height()) * m_data.bytesPerRow;
if (numBytes.hasOverflowed())
return;
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
IntSize maxSize = IOSurface::maximumSize();
if (width.unsafeGet() > maxSize.width() || height.unsafeGet() > maxSize.height())
accelerateRendering = false;
#else
ASSERT(renderingMode == Unaccelerated);
#endif
m_data.colorSpace = cachedCGColorSpace(imageColorSpace);
RetainPtr<CGContextRef> cgContext;
if (accelerateRendering) {
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
FloatSize userBounds = scaleSizeToUserSpace(FloatSize(width.unsafeGet(), height.unsafeGet()), m_data.backingStoreSize, m_size);
m_data.surface = IOSurface::create(m_data.backingStoreSize, IntSize(userBounds), imageColorSpace);
cgContext = m_data.surface->ensurePlatformContext();
if (cgContext)
CGContextClearRect(cgContext.get(), FloatRect(FloatPoint(), userBounds));
#endif
if (!cgContext)
accelerateRendering = false; // If allocation fails, fall back to non-accelerated path.
}
if (!accelerateRendering) {
if (!tryFastCalloc(m_data.backingStoreSize.height(), m_data.bytesPerRow.unsafeGet()).getValue(m_data.data))
return;
ASSERT(!(reinterpret_cast<intptr_t>(m_data.data) & 3));
#if USE_ARGB32
m_data.bitmapInfo = kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host;
#else
m_data.bitmapInfo = kCGImageAlphaPremultipliedLast;
#endif
cgContext = adoptCF(CGBitmapContextCreate(m_data.data, m_data.backingStoreSize.width(), m_data.backingStoreSize.height(), 8, m_data.bytesPerRow.unsafeGet(), m_data.colorSpace, m_data.bitmapInfo));
// Create a live image that wraps the data.
m_data.dataProvider = adoptCF(CGDataProviderCreateWithData(0, m_data.data, numBytes.unsafeGet(), releaseImageData));
if (!cgContext)
return;
m_data.context = std::make_unique<GraphicsContext>(cgContext.get());
}
context().scale(FloatSize(1, -1));
context().translate(0, -m_data.backingStoreSize.height());
context().applyDeviceScaleFactor(m_resolutionScale);
success = 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;
}
