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/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* (C) 2000 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef StyleImage_h
#define StyleImage_h
#include "core/CoreExport.h"
#include "platform/graphics/Image.h"
#include "wtf/Forward.h"
namespace blink {
class CSSValue;
class ImageResourceContent;
class IntSize;
class LayoutObject;
class LayoutSize;
class SVGImage;
typedef void* WrappedImagePtr;
class CORE_EXPORT StyleImage : public GarbageCollectedFinalized<StyleImage> {
public:
virtual ~StyleImage() {}
bool operator==(const StyleImage& other) const {
return data() == other.data();
}
virtual CSSValue* cssValue() const = 0;
virtual CSSValue* computedCSSValue() const = 0;
virtual bool canRender() const { return true; }
virtual bool isLoaded() const { return true; }
virtual bool errorOccurred() const { return false; }
// Note that the defaultObjectSize is assumed to be in the
// effective zoom level given by multiplier, i.e. if multiplier is
// the constant 1 the defaultObjectSize should be unzoomed.
virtual LayoutSize imageSize(const LayoutObject&,
float multiplier,
const LayoutSize& defaultObjectSize) const = 0;
virtual bool imageHasRelativeSize() const = 0;
virtual bool usesImageContainerSize() const = 0;
virtual void addClient(LayoutObject*) = 0;
virtual void removeClient(LayoutObject*) = 0;
// Note that the containerSize is assumed to be in the effective
// zoom level given by multiplier, i.e if the multiplier is the
// constant 1 the containerSize should be unzoomed.
virtual PassRefPtr<Image> image(const LayoutObject&,
const IntSize& containerSize,
float multiplier) const = 0;
virtual WrappedImagePtr data() const = 0;
virtual float imageScaleFactor() const { return 1; }
virtual bool knownToBeOpaque(const LayoutObject&) const = 0;
virtual ImageResourceContent* cachedImage() const { return 0; }
ALWAYS_INLINE bool isImageResource() const { return m_isImageResource; }
ALWAYS_INLINE bool isPendingImage() const { return m_isPendingImage; }
ALWAYS_INLINE bool isGeneratedImage() const { return m_isGeneratedImage; }
ALWAYS_INLINE bool isImageResourceSet() const { return m_isImageResourceSet; }
ALWAYS_INLINE bool isInvalidImage() const { return m_isInvalidImage; }
ALWAYS_INLINE bool isPaintImage() const { return m_isPaintImage; }
DEFINE_INLINE_VIRTUAL_TRACE() {}
protected:
StyleImage()
: m_isImageResource(false),
m_isPendingImage(false),
m_isGeneratedImage(false),
m_isImageResourceSet(false),
m_isInvalidImage(false),
m_isPaintImage(false) {}
bool m_isImageResource : 1;
bool m_isPendingImage : 1;
bool m_isGeneratedImage : 1;
bool m_isImageResourceSet : 1;
bool m_isInvalidImage : 1;
bool m_isPaintImage : 1;
static LayoutSize applyZoom(const LayoutSize&, float multiplier);
LayoutSize imageSizeForSVGImage(SVGImage*,
float multiplier,
const LayoutSize& defaultObjectSize) const;
};
#define DEFINE_STYLE_IMAGE_TYPE_CASTS(thisType, function) \
DEFINE_TYPE_CASTS(thisType, StyleImage, styleImage, styleImage->function, \
styleImage.function); \
inline thisType* to##thisType(const Member<StyleImage>& styleImage) { \
return to##thisType(styleImage.get()); \
} \
typedef int NeedsSemiColonAfterDefineStyleImageTypeCasts
} // namespace blink
#endif
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