2 * Copyright (C) 2008 Apple Inc. All rights reserved.
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29 #include "platform/PlatformExport.h"
30 #include "wtf/FastAllocBase.h"
31 #include "wtf/Forward.h"
32 #include "wtf/Noncopyable.h"
33 #include "wtf/PassRefPtr.h"
34 #include "wtf/RefCounted.h"
35 #include "wtf/unicode/Unicode.h"
41 class PLATFORM_EXPORT FontData : public RefCounted<FontData> {
42 WTF_MAKE_NONCOPYABLE(FontData); WTF_MAKE_FAST_ALLOCATED;
45 : m_maxGlyphPageTreeLevel(0)
51 virtual const SimpleFontData* fontDataForCharacter(UChar32) const = 0;
52 virtual bool isCustomFont() const = 0;
53 virtual bool isLoading() const = 0;
54 // Returns whether this is a temporary font data for a custom font which is not yet loaded.
55 virtual bool isLoadingFallback() const = 0;
56 virtual bool isSegmented() const = 0;
57 virtual bool shouldSkipDrawing() const = 0;
59 void setMaxGlyphPageTreeLevel(unsigned level) const { m_maxGlyphPageTreeLevel = level; }
60 unsigned maxGlyphPageTreeLevel() const { return m_maxGlyphPageTreeLevel; }
63 virtual String description() const = 0;
67 mutable unsigned m_maxGlyphPageTreeLevel;
70 #define DEFINE_FONT_DATA_TYPE_CASTS(thisType, predicate) \
71 template<typename T> inline thisType* to##thisType(const RefPtr<T>& fontData) { return to##thisType(fontData.get()); } \
72 DEFINE_TYPE_CASTS(thisType, FontData, fontData, fontData->isSegmented() == predicate, fontData.isSegmented() == predicate)