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/*
* Copyright (C) 2020-2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ImageBufferShareableBitmapBackend.h"
#include <WebCore/GraphicsContext.h>
#include <WebCore/PixelBuffer.h>
#include <WebCore/ShareableBitmap.h>
#include <wtf/StdLibExtras.h>
#include <wtf/TZoneMallocInlines.h>
#if PLATFORM(COCOA)
#include <WebCore/GraphicsContextCG.h>
#endif
namespace WebKit {
using namespace WebCore;
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(ImageBufferShareableBitmapBackend);
IntSize ImageBufferShareableBitmapBackend::calculateSafeBackendSize(const Parameters& parameters)
{
IntSize backendSize = parameters.backendSize;
if (backendSize.isEmpty())
return { };
CheckedUint32 numBytes = ShareableBitmapConfiguration::calculateSizeInBytes(backendSize, parameters.colorSpace);
if (numBytes.hasOverflowed())
return { };
return backendSize;
}
unsigned ImageBufferShareableBitmapBackend::calculateBytesPerRow(const Parameters& parameters, const IntSize& backendSize)
{
ASSERT(!backendSize.isEmpty());
return ShareableBitmapConfiguration::calculateBytesPerRow(backendSize, parameters.colorSpace);
}
size_t ImageBufferShareableBitmapBackend::calculateMemoryCost(const Parameters& parameters)
{
return ImageBufferBackend::calculateMemoryCost(parameters.backendSize, calculateBytesPerRow(parameters, parameters.backendSize));
}
std::unique_ptr<ImageBufferShareableBitmapBackend> ImageBufferShareableBitmapBackend::create(const Parameters& parameters, const ImageBufferCreationContext& creationContext)
{
ASSERT(parameters.pixelFormat == ImageBufferPixelFormat::BGRA8 || parameters.pixelFormat == ImageBufferPixelFormat::BGRX8);
IntSize backendSize = calculateSafeBackendSize(parameters);
if (backendSize.isEmpty())
return nullptr;
auto bitmap = ShareableBitmap::create({ backendSize, parameters.colorSpace });
if (!bitmap)
return nullptr;
if (creationContext.resourceOwner)
bitmap->setOwnershipOfMemory(creationContext.resourceOwner);
auto context = bitmap->createGraphicsContext();
if (!context)
return nullptr;
return makeUnique<ImageBufferShareableBitmapBackend>(parameters, bitmap.releaseNonNull(), WTFMove(context));
}
std::unique_ptr<ImageBufferShareableBitmapBackend> ImageBufferShareableBitmapBackend::create(const Parameters& parameters, ShareableBitmap::Handle handle)
{
auto bitmap = ShareableBitmap::create(WTFMove(handle));
if (!bitmap)
return nullptr;
auto context = bitmap->createGraphicsContext();
if (!context)
return nullptr;
return makeUnique<ImageBufferShareableBitmapBackend>(parameters, bitmap.releaseNonNull(), WTFMove(context));
}
ImageBufferShareableBitmapBackend::ImageBufferShareableBitmapBackend(const Parameters& parameters, Ref<ShareableBitmap>&& bitmap, std::unique_ptr<GraphicsContext>&& context)
: ImageBufferShareableBitmapBackendBase(parameters)
, m_bitmap(WTFMove(bitmap))
, m_context(WTFMove(context))
{
// ShareableBitmap ensures that the coordinate space in the context that we're adopting
// has a top-left origin, so we don't ever need to flip here, so we don't call setupContext().
// However, ShareableBitmap does not have a notion of scale, so we must apply the device
// scale factor to the context ourselves.
m_context->applyDeviceScaleFactor(resolutionScale());
}
ImageBufferShareableBitmapBackend::~ImageBufferShareableBitmapBackend() = default;
bool ImageBufferShareableBitmapBackend::canMapBackingStore() const
{
return true;
}
std::optional<ImageBufferBackendHandle> ImageBufferShareableBitmapBackend::createBackendHandle(SharedMemory::Protection protection) const
{
if (auto handle = m_bitmap->createHandle(protection))
return ImageBufferBackendHandle(WTFMove(*handle));
return { };
}
void ImageBufferShareableBitmapBackend::transferToNewContext(const ImageBufferCreationContext& creationContext)
{
if (creationContext.resourceOwner)
m_bitmap->setOwnershipOfMemory(creationContext.resourceOwner);
}
unsigned ImageBufferShareableBitmapBackend::bytesPerRow() const
{
return m_bitmap->bytesPerRow();
}
#if USE(CAIRO)
RefPtr<cairo_surface_t> ImageBufferShareableBitmapBackend::createCairoSurface()
{
return m_bitmap->createPersistentCairoSurface();
}
#endif
RefPtr<NativeImage> ImageBufferShareableBitmapBackend::copyNativeImage()
{
return NativeImage::create(m_bitmap->createPlatformImage(CopyBackingStore));
}
RefPtr<NativeImage> ImageBufferShareableBitmapBackend::createNativeImageReference()
{
return NativeImage::create(m_bitmap->createPlatformImage(DontCopyBackingStore));
}
void ImageBufferShareableBitmapBackend::getPixelBuffer(const IntRect& srcRect, PixelBuffer& destination)
{
ImageBufferBackend::getPixelBuffer(srcRect, m_bitmap->span(), destination);
}
void ImageBufferShareableBitmapBackend::putPixelBuffer(const PixelBuffer& pixelBuffer, const IntRect& srcRect, const IntPoint& destPoint, AlphaPremultiplication destFormat)
{
ImageBufferBackend::putPixelBuffer(pixelBuffer, srcRect, destPoint, destFormat, m_bitmap->mutableSpan());
}
String ImageBufferShareableBitmapBackend::debugDescription() const
{
TextStream stream;
stream << "ImageBufferShareableBitmapBackend " << this;
return stream.release();
}
} // namespace WebKit
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