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/*
* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
* Copyright (C) 2004-2023 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. ``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 "Color.h"
#include "DecodingOptions.h"
#include "FloatRect.h"
#include "FloatSize.h"
#include "GraphicsTypes.h"
#include "ImageAdapter.h"
#include "ImageOrientation.h"
#include "ImagePaintingOptions.h"
#include "ImageTypes.h"
#include "NativeImage.h"
#include "Timer.h"
#include <wtf/RefCountedAndCanMakeWeakPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/RetainPtr.h>
#include <wtf/TypeCasts.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class AffineTransform;
class FloatPoint;
class FloatSize;
class GraphicsContext;
class FragmentedSharedBuffer;
class ShareableBitmap;
struct Length;
// This class gets notified when an image creates or destroys decoded frames and when it advances animation frames.
class ImageObserver;
class Image : public RefCountedAndCanMakeWeakPtr<Image> {
friend class CachedSubimage;
friend class GraphicsContext;
public:
virtual ~Image();
WEBCORE_EXPORT static RefPtr<Image> create(ImageObserver&);
WEBCORE_EXPORT static std::optional<Ref<Image>> create(RefPtr<ShareableBitmap>&&);
WEBCORE_EXPORT static bool supportsType(const String&);
virtual bool isBitmapImage() const { return false; }
virtual bool isGeneratedImage() const { return false; }
virtual bool isCrossfadeGeneratedImage() const { return false; }
virtual bool isNamedImageGeneratedImage() const { return false; }
virtual bool isGradientImage() const { return false; }
virtual bool isSVGImage() const { return false; }
virtual bool isSVGImageForContainer() const { return false; }
virtual bool isSVGResourceImage() const { return false; }
virtual bool isPDFDocumentImage() const { return false; }
virtual bool isCustomPaintImage() const { return false; }
bool drawsSVGImage() const { return isSVGImage() || isSVGImageForContainer(); }
virtual unsigned frameCount() const { return 1; }
virtual bool currentFrameKnownToBeOpaque() const = 0;
virtual bool isAnimated() const { return false; }
// Derived classes should override this if their rendering could leak
// cross-origin data (outside of the resource itself, which undergoes
// a CORS cross-origin check).
virtual bool renderingTaintsOrigin() const { return false; }
WEBCORE_EXPORT static Image& nullImage();
bool isNull() const { return size().isEmpty(); }
virtual void setContainerSize(const FloatSize&) { }
virtual bool usesContainerSize() const { return false; }
virtual bool hasRelativeWidth() const { return false; }
virtual bool hasRelativeHeight() const { return false; }
virtual void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio);
virtual FloatSize size(ImageOrientation = ImageOrientation::Orientation::FromImage) const = 0;
virtual FloatSize sourceSize(ImageOrientation orientation = ImageOrientation::Orientation::FromImage) const { return size(orientation); }
virtual bool hasDensityCorrectedSize() const { return false; }
FloatRect rect() const { return FloatRect(FloatPoint(), size()); }
float width() const { return size().width(); }
float height() const { return size().height(); }
virtual std::optional<IntPoint> hotSpot() const { return std::nullopt; }
virtual ImageOrientation orientation() const { return ImageOrientation::Orientation::FromImage; }
WEBCORE_EXPORT EncodedDataStatus setData(RefPtr<FragmentedSharedBuffer>&& data, bool allDataReceived);
virtual EncodedDataStatus dataChanged(bool /*allDataReceived*/) { return EncodedDataStatus::Unknown; }
virtual String uti() const { return String(); } // null string if unknown
virtual String filenameExtension() const { return String(); } // null string if unknown
virtual String accessibilityDescription() const { return String(); } // null string if unknown
virtual void destroyDecodedData(bool /*destroyAll*/ = true) { }
FragmentedSharedBuffer* data() { return m_encodedImageData.get(); }
const FragmentedSharedBuffer* data() const { return m_encodedImageData.get(); }
virtual DestinationColorSpace colorSpace();
virtual Headroom headroom() const { return Headroom::None; }
// Animation begins whenever someone draws the image, so startAnimation() is not normally called.
// It will automatically pause once all observers no longer want to render the image anywhere.
virtual void startAnimation() { }
void startAnimationAsynchronously();
virtual void stopAnimation() {}
virtual void resetAnimation() {}
virtual bool isAnimating() const { return false; }
bool animationPending() const { return m_animationStartTimer && m_animationStartTimer->isActive(); }
std::optional<bool> allowsAnimation() const { return m_allowsAnimation; }
void setAllowsAnimation(std::optional<bool> allowsAnimation) { m_allowsAnimation = allowsAnimation; }
static bool systemAllowsAnimationControls() { return gSystemAllowsAnimationControls; }
WEBCORE_EXPORT static void setSystemAllowsAnimationControls(bool allowsControls);
// Typically the CachedImage that owns us.
RefPtr<ImageObserver> imageObserver() const;
void setImageObserver(RefPtr<ImageObserver>&&);
WEBCORE_EXPORT ImageAdapter& adapter();
void invalidateAdapter();
URL sourceURL() const;
WEBCORE_EXPORT String mimeType() const;
long long expectedContentLength() const;
enum TileRule { StretchTile, RoundTile, SpaceTile, RepeatTile };
virtual RefPtr<NativeImage> nativeImage(const DestinationColorSpace& = DestinationColorSpace::SRGB()) { return nullptr; }
virtual RefPtr<NativeImage> nativeImageAtIndex(unsigned) { return nativeImage(); }
virtual RefPtr<NativeImage> currentNativeImage() { return nativeImage(); }
virtual RefPtr<NativeImage> currentPreTransformedNativeImage(ImageOrientation = ImageOrientation::Orientation::FromImage) { return currentNativeImage(); }
virtual void drawPattern(GraphicsContext&, const FloatRect& destRect, const FloatRect& srcRect, const AffineTransform& patternTransform, const FloatPoint& phase, const FloatSize& spacing, ImagePaintingOptions = { });
#if ASSERT_ENABLED
virtual bool hasSolidColor() { return false; }
#endif
#if ENABLE(QUICKLOOK_FULLSCREEN)
virtual bool shouldUseQuickLookForFullscreen() const { return false; }
#endif
#if ENABLE(SPATIAL_IMAGE_DETECTION)
virtual bool isSpatial() const { return false; }
#endif
virtual void dump(WTF::TextStream&) const;
WEBCORE_EXPORT RefPtr<ShareableBitmap> toShareableBitmap() const;
protected:
WEBCORE_EXPORT Image(ImageObserver* = nullptr);
static void fillWithSolidColor(GraphicsContext&, const FloatRect& dstRect, const Color&, CompositeOperator);
virtual bool shouldDrawFromCachedSubimage(GraphicsContext&) const { return false; }
virtual bool mustDrawFromCachedSubimage(GraphicsContext&) const { return false; }
virtual ImageDrawResult draw(GraphicsContext&, const FloatRect& dstRect, const FloatRect& srcRect, ImagePaintingOptions = { }) = 0;
ImageDrawResult drawTiled(GraphicsContext&, const FloatRect& dstRect, const FloatPoint& srcPoint, const FloatSize& tileSize, const FloatSize& spacing, ImagePaintingOptions = { });
ImageDrawResult drawTiled(GraphicsContext&, const FloatRect& dstRect, const FloatRect& srcRect, const FloatSize& tileScaleFactor, TileRule hRule, TileRule vRule, ImagePaintingOptions = { });
// Supporting tiled drawing
virtual std::optional<Color> singlePixelSolidColor() const { return std::nullopt; }
private:
RefPtr<FragmentedSharedBuffer> m_encodedImageData;
WeakPtr<ImageObserver> m_imageObserver;
std::unique_ptr<ImageAdapter> m_adapter;
// A value of true or false will override the default Page::imageAnimationEnabled state.
std::optional<bool> m_allowsAnimation { std::nullopt };
std::unique_ptr<Timer> m_animationStartTimer;
static bool gSystemAllowsAnimationControls;
};
WTF::TextStream& operator<<(WTF::TextStream&, const Image&);
} // namespace WebCore
#define SPECIALIZE_TYPE_TRAITS_IMAGE(ToClassName) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ToClassName) \
static bool isType(const WebCore::Image& image) { return image.is##ToClassName(); } \
SPECIALIZE_TYPE_TRAITS_END()
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