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| 1 /* | |
| 2 * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@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(SimpleShaper&, 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 l
ength, UChar* buffer, const SimpleFontData*) const; | |
| 64 bool fillNonBMPGlyphs(SVGFontElement*, GlyphPage* , unsigned offset, unsigne
d 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 ref
erence 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 doc
ument'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 | |
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