1/* 2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org) 3 * (C) 2000 Antti Koivisto (koivisto@kde.org) 4 * (C) 2000 Dirk Mueller (mueller@kde.org) 5 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public License 18 * along with this library; see the file COPYING.LIB. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 * 22 */ 23 24#ifndef StyleImage_h 25#define StyleImage_h 26 27#include "CSSValue.h" 28#include "FloatSize.h" 29#include "Image.h" 30#include <wtf/PassRefPtr.h> 31#include <wtf/RefCounted.h> 32#include <wtf/RefPtr.h> 33 34namespace WebCore { 35 36class CachedImage; 37class CSSValue; 38class RenderElement; 39class RenderObject; 40 41typedef const void* WrappedImagePtr; 42 43class StyleImage : public RefCounted<StyleImage> { 44public: 45 virtual ~StyleImage() { } 46 47 bool operator==(const StyleImage& other) const 48 { 49 return data() == other.data(); 50 } 51 52 virtual PassRefPtr<CSSValue> cssValue() const = 0; 53 54 virtual bool canRender(const RenderObject*, float /*multiplier*/) const { return true; } 55 virtual bool isLoaded() const { return true; } 56 virtual bool errorOccurred() const { return false; } 57 virtual FloatSize imageSize(const RenderElement*, float multiplier) const = 0; 58 virtual void computeIntrinsicDimensions(const RenderElement*, Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) = 0; 59 virtual bool imageHasRelativeWidth() const = 0; 60 virtual bool imageHasRelativeHeight() const = 0; 61 virtual bool usesImageContainerSize() const = 0; 62 virtual void setContainerSizeForRenderer(const RenderElement*, const FloatSize&, float) = 0; 63 virtual void addClient(RenderElement*) = 0; 64 virtual void removeClient(RenderElement*) = 0; 65 virtual PassRefPtr<Image> image(RenderElement*, const FloatSize&) const = 0; 66 virtual WrappedImagePtr data() const = 0; 67 virtual float imageScaleFactor() const { return 1; } 68 virtual bool knownToBeOpaque(const RenderElement*) const = 0; 69 virtual CachedImage* cachedImage() const { return 0; } 70 71 ALWAYS_INLINE bool isCachedImage() const { return m_isCachedImage; } 72 ALWAYS_INLINE bool isPendingImage() const { return m_isPendingImage; } 73 ALWAYS_INLINE bool isGeneratedImage() const { return m_isGeneratedImage; } 74 ALWAYS_INLINE bool isCachedImageSet() const { return m_isCachedImageSet; } 75 76 static bool imagesEquivalent(StyleImage* image1, StyleImage* image2) 77 { 78 return image1 == image2 || (image1 && image2 && *image1 == *image2); 79 } 80 81protected: 82 StyleImage() 83 : m_isCachedImage(false) 84 , m_isPendingImage(false) 85 , m_isGeneratedImage(false) 86 , m_isCachedImageSet(false) 87 { 88 } 89 bool m_isCachedImage : 1; 90 bool m_isPendingImage : 1; 91 bool m_isGeneratedImage : 1; 92 bool m_isCachedImageSet : 1; 93}; 94 95#define STYLE_IMAGE_TYPE_CASTS(ToClassName, FromClassName, predicate) \ 96 TYPE_CASTS_BASE(ToClassName, FromClassName, styleImage, styleImage->predicate(), styleImage.predicate()) 97 98} 99#endif 100