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26 #ifndef CSSCrossfadeValue_h
27 #define CSSCrossfadeValue_h
29 #include "CachedImageClient.h"
30 #include "CachedResourceHandle.h"
31 #include "CSSImageGeneratorValue.h"
32 #include "CSSPrimitiveValue.h"
34 #include "ImageObserver.h"
39 class CrossfadeSubimageObserverProxy;
43 class CSSCrossfadeValue : public CSSImageGeneratorValue {
44 friend class CrossfadeSubimageObserverProxy;
46 static PassRef<CSSCrossfadeValue> create(PassRefPtr<CSSValue> fromValue, PassRefPtr<CSSValue> toValue)
48 return adoptRef(*new CSSCrossfadeValue(fromValue, toValue));
53 String customCSSText() const;
55 PassRefPtr<Image> image(RenderElement*, const IntSize&);
56 bool isFixedSize() const { return true; }
57 IntSize fixedSize(const RenderElement*);
59 bool isPending() const;
60 bool knownToBeOpaque(const RenderElement*) const;
62 void loadSubimages(CachedResourceLoader*);
64 void setPercentage(PassRefPtr<CSSPrimitiveValue> percentageValue) { m_percentageValue = percentageValue; }
66 bool hasFailedOrCanceledSubresources() const;
68 PassRefPtr<CSSCrossfadeValue> blend(const CSSCrossfadeValue&, double) const;
70 bool equals(const CSSCrossfadeValue&) const;
72 bool equalInputImages(const CSSCrossfadeValue&) const;
75 CSSCrossfadeValue(PassRefPtr<CSSValue> fromValue, PassRefPtr<CSSValue> toValue)
76 : CSSImageGeneratorValue(CrossfadeClass)
77 , m_fromValue(fromValue)
79 , m_crossfadeSubimageObserver(this)
83 class CrossfadeSubimageObserverProxy : public CachedImageClient {
85 CrossfadeSubimageObserverProxy(CSSCrossfadeValue* ownerValue)
86 : m_ownerValue(ownerValue)
91 virtual ~CrossfadeSubimageObserverProxy() { }
92 virtual void imageChanged(CachedImage*, const IntRect* = 0) override;
93 void setReady(bool ready) { m_ready = ready; }
95 CSSCrossfadeValue* m_ownerValue;
99 void crossfadeChanged(const IntRect&);
101 RefPtr<CSSValue> m_fromValue;
102 RefPtr<CSSValue> m_toValue;
103 RefPtr<CSSPrimitiveValue> m_percentageValue;
105 CachedResourceHandle<CachedImage> m_cachedFromImage;
106 CachedResourceHandle<CachedImage> m_cachedToImage;
108 RefPtr<Image> m_generatedImage;
110 CrossfadeSubimageObserverProxy m_crossfadeSubimageObserver;
113 CSS_VALUE_TYPE_CASTS(CSSCrossfadeValue, isCrossfadeValue())
115 } // namespace WebCore
117 #endif // CSSCrossfadeValue_h