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/*
* Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2007-2020 Apple Inc. All rights reserved.
* Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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. ``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
* 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.
*/
#pragma once
#include "DisplayListFlushIdentifier.h"
#include "ImageBufferBackend.h"
#include "RenderingMode.h"
#include "RenderingResourceIdentifier.h"
#include <wtf/RefCounted.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
namespace DisplayList {
class DisplayList;
class DrawingContext;
struct ItemBufferHandle;
}
class ImageBuffer : public ThreadSafeRefCounted<ImageBuffer>, public CanMakeWeakPtr<ImageBuffer> {
public:
// Will return a null pointer on allocation failure.
WEBCORE_EXPORT static RefPtr<ImageBuffer> create(const FloatSize&, RenderingMode, ShouldUseDisplayList, RenderingPurpose, float resolutionScale, const DestinationColorSpace&, PixelFormat, const HostWindow* = nullptr);
WEBCORE_EXPORT static RefPtr<ImageBuffer> create(const FloatSize&, RenderingMode, float resolutionScale, const DestinationColorSpace&, PixelFormat, const HostWindow* = nullptr);
// Create an image buffer compatible with the context, with suitable resolution for drawing into the buffer and then into this context.
static RefPtr<ImageBuffer> createCompatibleBuffer(const FloatSize&, const GraphicsContext&);
static RefPtr<ImageBuffer> createCompatibleBuffer(const FloatSize&, const DestinationColorSpace&, const GraphicsContext&);
static RefPtr<ImageBuffer> createCompatibleBuffer(const FloatSize&, float resolutionScale, const DestinationColorSpace&, const GraphicsContext&);
// These functions are used when clamping the ImageBuffer which is created for filter, masker or clipper.
static bool sizeNeedsClamping(const FloatSize&);
static bool sizeNeedsClamping(const FloatSize&, FloatSize& scale);
static FloatSize clampedSize(const FloatSize&);
static FloatSize clampedSize(const FloatSize&, FloatSize& scale);
static FloatRect clampedRect(const FloatRect&);
static IntSize compatibleBufferSize(const FloatSize&, const GraphicsContext&);
WEBCORE_EXPORT virtual ~ImageBuffer() = default;
virtual void setBackend(std::unique_ptr<ImageBufferBackend>&&) = 0;
virtual void clearBackend() = 0;
virtual ImageBufferBackend* backend() const = 0;
virtual ImageBufferBackend* ensureBackendCreated() const = 0;
virtual RenderingMode renderingMode() const = 0;
virtual bool canMapBackingStore() const = 0;
virtual RenderingResourceIdentifier renderingResourceIdentifier() const { return { }; }
virtual GraphicsContext& context() const = 0;
virtual void flushContext() = 0;
virtual DisplayList::DrawingContext* drawingContext() { return nullptr; }
virtual bool prefersPreparationForDisplay() { return false; }
virtual void flushDrawingContext() { }
virtual void flushDrawingContextAsync() { }
virtual void didFlush(DisplayList::FlushIdentifier) { }
virtual void changeDestinationImageBuffer(RenderingResourceIdentifier) { }
virtual void prepareToAppendDisplayListItems(DisplayList::ItemBufferHandle&&) { }
virtual IntSize logicalSize() const = 0;
virtual float resolutionScale() const = 0;
virtual DestinationColorSpace colorSpace() const = 0;
virtual PixelFormat pixelFormat() const = 0;
virtual const ImageBufferBackend::Parameters& parameters() const = 0;
virtual IntSize backendSize() const = 0;
virtual AffineTransform baseTransform() const = 0;
virtual size_t memoryCost() const = 0;
virtual size_t externalMemoryCost() const = 0;
virtual bool isInUse() const = 0;
virtual void releaseGraphicsContext() = 0;
virtual VolatilityState setVolatile(bool) = 0;
virtual void releaseBufferToPool() = 0;
virtual std::unique_ptr<ThreadSafeImageBufferFlusher> createFlusher() = 0;
virtual RefPtr<NativeImage> copyNativeImage(BackingStoreCopy = CopyBackingStore) const = 0;
virtual RefPtr<Image> copyImage(BackingStoreCopy = CopyBackingStore, PreserveResolution = PreserveResolution::No) const = 0;
// Create an image buffer compatible with the context and copy rect from this buffer into this new one.
RefPtr<ImageBuffer> copyRectToBuffer(const FloatRect&, const DestinationColorSpace&, const GraphicsContext&);
virtual void draw(GraphicsContext&, const FloatRect& destRect, const FloatRect& srcRect = FloatRect(0, 0, -1, -1), const ImagePaintingOptions& = { }) = 0;
virtual void drawPattern(GraphicsContext&, const FloatRect& destRect, const FloatRect& srcRect, const AffineTransform& patternTransform, const FloatPoint& phase, const FloatSize& spacing, const ImagePaintingOptions& = { }) = 0;
static RefPtr<NativeImage> sinkIntoNativeImage(RefPtr<ImageBuffer>);
WEBCORE_EXPORT static RefPtr<Image> sinkIntoImage(RefPtr<ImageBuffer>, PreserveResolution = PreserveResolution::No);
static void drawConsuming(RefPtr<ImageBuffer>, GraphicsContext&, const FloatRect& destRect, const FloatRect& srcRect = FloatRect(0, 0, -1, -1), const ImagePaintingOptions& = { });
virtual void clipToMask(GraphicsContext&, const FloatRect& destRect) = 0;
virtual void convertToLuminanceMask() = 0;
virtual void transformToColorSpace(const DestinationColorSpace&) = 0;
virtual String toDataURL(const String& mimeType, std::optional<double> quality = std::nullopt, PreserveResolution = PreserveResolution::No) const = 0;
virtual Vector<uint8_t> toData(const String& mimeType, std::optional<double> quality = std::nullopt) const = 0;
virtual std::optional<PixelBuffer> getPixelBuffer(const PixelBufferFormat& outputFormat, const IntRect& srcRect) const = 0;
virtual void putPixelBuffer(const PixelBuffer&, const IntRect& srcRect, const IntPoint& destPoint = { }, AlphaPremultiplication destFormat = AlphaPremultiplication::Premultiplied) = 0;
// FIXME: current implementations of this method have the restriction that they only work
// with textures that are RGB or RGBA format, and UNSIGNED_BYTE type.
virtual bool copyToPlatformTexture(GraphicsContextGL&, GCGLenum, PlatformGLObject, GCGLenum, bool, bool) const = 0;
virtual PlatformLayer* platformLayer() const = 0;
protected:
ImageBuffer() = default;
virtual RefPtr<NativeImage> sinkIntoNativeImage() = 0;
virtual RefPtr<Image> sinkIntoImage(PreserveResolution = PreserveResolution::No) = 0;
virtual void drawConsuming(GraphicsContext&, const FloatRect& destRect, const FloatRect& srcRect, const ImagePaintingOptions&) = 0;
};
using ImageBufferHashMap = HashMap<RenderingResourceIdentifier, Ref<ImageBuffer>>;
} // namespace WebCore
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