1 /* 2 * Copyright (C) 2008 Nikolas Zimmermann <zimmermann (at) kde.org> 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 #ifndef SVGFontData_h 21 #define SVGFontData_h 22 23 #if ENABLE(SVG_FONTS) 24 #include "platform/fonts/CustomFontData.h" 25 #include "wtf/WeakPtr.h" 26 #include "wtf/text/WTFString.h" 27 28 namespace blink { 29 30 class SimpleFontData; 31 class SVGFontElement; 32 class SVGFontFaceElement; 33 34 class SVGFontData FINAL : public CustomFontData { 35 public: 36 static PassRefPtr<SVGFontData> create(SVGFontFaceElement* element) 37 { 38 return adoptRef(new SVGFontData(element)); 39 } 40 41 virtual ~SVGFontData(); 42 43 virtual bool isSVGFont() const OVERRIDE { return true; }; 44 virtual bool shouldSkipDrawing() const OVERRIDE; 45 virtual void initializeFontData(SimpleFontData*, float fontSize) OVERRIDE; 46 virtual float widthForSVGGlyph(Glyph, float fontSize) const OVERRIDE; 47 virtual bool fillSVGGlyphPage(GlyphPage*, unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData*) const OVERRIDE; 48 virtual bool applySVGGlyphSelection(WidthIterator&, GlyphData&, bool mirror, int currentCharacter, unsigned& advanceLength) const OVERRIDE; 49 50 SVGFontFaceElement* svgFontFaceElement() const; 51 52 float horizontalOriginX() const { return m_horizontalOriginX; } 53 float horizontalOriginY() const { return m_horizontalOriginY; } 54 float horizontalAdvanceX() const { return m_horizontalAdvanceX; } 55 56 float verticalOriginX() const { return m_verticalOriginX; } 57 float verticalOriginY() const { return m_verticalOriginY; } 58 float verticalAdvanceY() const { return m_verticalAdvanceY; } 59 60 private: 61 SVGFontData(SVGFontFaceElement*); 62 63 bool fillBMPGlyphs(SVGFontElement*, GlyphPage* , unsigned offset, unsigned length, UChar* buffer, const SimpleFontData*) const; 64 bool fillNonBMPGlyphs(SVGFontElement*, GlyphPage* , unsigned offset, unsigned length, UChar* buffer, const SimpleFontData*) const; 65 66 String createStringWithMirroredCharacters(const String&) const; 67 68 // Ths SVGFontFaceElement is kept alive -- 69 // 1) in the external font case: by the CSSFontFaceSource, which holds a reference to the external SVG document 70 // containing the element; 71 // 2) in the in-document font case: by virtue of being in the document tree and making sure that when it is removed 72 // from the document, it removes the @font-face rule it owns from the document's mapped element sheet and forces 73 // a style update. 74 WeakPtr<SVGFontFaceElement> m_svgFontFaceElement; 75 76 float m_horizontalOriginX; 77 float m_horizontalOriginY; 78 float m_horizontalAdvanceX; 79 80 float m_verticalOriginX; 81 float m_verticalOriginY; 82 float m_verticalAdvanceY; 83 }; 84 85 DEFINE_CUSTOM_FONT_DATA_TYPE_CASTS(SVGFontData, isSVGFont()); 86 87 } // namespace blink 88 89 #endif 90 #endif // SVGFontData_h 91
