1 /* 2 * Copyright (C) Research In Motion Limited 2011. All rights reserved. 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 SVGTextRunRenderingContext_h 22 #define SVGTextRunRenderingContext_h 23 24 #include "platform/fonts/Font.h" 25 #include "platform/text/TextRun.h" 26 27 namespace blink { 28 29 class RenderObject; 30 class RenderSVGResource; 31 32 class SVGTextRunRenderingContext FINAL : public TextRun::RenderingContext { 33 public: 34 static PassRefPtr<SVGTextRunRenderingContext> create(RenderObject* renderer) 35 { 36 return adoptRef(new SVGTextRunRenderingContext(renderer)); 37 } 38 39 RenderObject* renderer() const { return m_renderer; } 40 41 #if ENABLE(SVG_FONTS) 42 virtual GlyphData glyphDataForCharacter(const Font&, const TextRun&, WidthIterator&, UChar32 character, bool mirror, int currentCharacter, unsigned& advanceLength) OVERRIDE; 43 virtual void drawSVGGlyphs(GraphicsContext*, const TextRun&, const SimpleFontData*, const GlyphBuffer&, int from, int to, const FloatPoint&) const OVERRIDE; 44 virtual float floatWidthUsingSVGFont(const Font&, const TextRun&, int& charsConsumed, Glyph& glyphId) const OVERRIDE; 45 #else 46 virtual GlyphData glyphDataForCharacter(const Font&, const TextRun&, WidthIterator&, UChar32 character, bool mirror, int currentCharacter, unsigned& advanceLength) OVERRIDE { return 0; } 47 virtual void drawSVGGlyphs(GraphicsContext*, const TextRun&, const SimpleFontData*, const GlyphBuffer&, int from, int to, const FloatPoint&) const OVERRIDE { } 48 virtual float floatWidthUsingSVGFont(const Font&, const TextRun&, int& charsConsumed, Glyph& glyphId) const OVERRIDE { return 0; } 49 #endif 50 51 private: 52 SVGTextRunRenderingContext(RenderObject* renderer) 53 : m_renderer(renderer) 54 { 55 } 56 57 virtual ~SVGTextRunRenderingContext() { } 58 59 RenderObject* m_renderer; 60 }; 61 62 inline bool textRunNeedsRenderingContext(const Font& font) 63 { 64 // Only save the extra data if SVG Fonts are used, which depend on them. 65 // FIXME: SVG Fonts won't work as segmented fonts at the moment, if that's fixed, we need to check for them as well below. 66 ASSERT(font.primaryFont()); 67 return font.primaryFont()->isSVGFont(); 68 } 69 70 } // namespace blink 71 72 #endif // SVGTextRunRenderingContext_h 73
