1 /* 2 * Copyright (C) 2013 Google, Inc. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 * 19 */ 20 21 #ifndef CustomFontData_h 22 #define CustomFontData_h 23 24 #include "platform/PlatformExport.h" 25 #include "platform/fonts/Glyph.h" 26 #include "wtf/PassRefPtr.h" 27 #include "wtf/RefCounted.h" 28 #include <unicode/uchar.h> 29 30 namespace WebCore { 31 32 class CSSFontFaceSource; 33 struct GlyphData; 34 class GlyphPage; 35 class SimpleFontData; 36 struct WidthIterator; 37 38 class PLATFORM_EXPORT CustomFontData : public RefCounted<CustomFontData> { 39 public: 40 static PassRefPtr<CustomFontData> create(bool isLoadingFallback = false) 41 { 42 return adoptRef(new CustomFontData(isLoadingFallback)); 43 } 44 45 virtual ~CustomFontData() { } 46 47 virtual void beginLoadIfNeeded() const { }; 48 bool isLoading() const { return m_isLoadingFallback && m_isUsed; } 49 bool isLoadingFallback() const { return m_isLoadingFallback; } 50 51 virtual bool isSVGFont() const { return false; } 52 virtual void initializeFontData(SimpleFontData*, float) { } 53 virtual float widthForSVGGlyph(Glyph, float) const { return 0.0f; } 54 virtual bool fillSVGGlyphPage(GlyphPage*, unsigned, unsigned, UChar*, unsigned, const SimpleFontData*) const { return false; } 55 virtual bool applySVGGlyphSelection(WidthIterator&, GlyphData&, bool, int, unsigned&) const { return false; } 56 57 virtual void setCSSFontFaceSource(CSSFontFaceSource* source) { ASSERT_NOT_REACHED(); } 58 virtual void clearCSSFontFaceSource() { } 59 60 protected: 61 CustomFontData(bool isLoadingFallback) 62 : m_isLoadingFallback(isLoadingFallback) 63 , m_isUsed(false) 64 { 65 } 66 67 bool m_isLoadingFallback; // Whether or not this is a temporary font data for a custom font which is not yet loaded. 68 mutable bool m_isUsed; 69 }; 70 71 } 72 73 #endif // CustomFontData_h 74
