1 /* 2 * Copyright (C) 2006, 2009, 2011 Apple Inc. All rights reserved. 3 * Copyright (C) 2007-2008 Torch Mobile Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 15 * its contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef GlyphBuffer_h 31 #define GlyphBuffer_h 32 33 #include "platform/fonts/Glyph.h" 34 #include "platform/geometry/FloatSize.h" 35 #include "platform/heap/Heap.h" 36 #include "wtf/Vector.h" 37 38 namespace blink { 39 40 class SimpleFontData; 41 42 class GlyphBuffer { 43 STACK_ALLOCATED(); 44 public: GlyphBuffer()45 GlyphBuffer() : m_hasVerticalAdvances(false) { } 46 isEmpty()47 bool isEmpty() const { return m_fontData.isEmpty(); } size()48 unsigned size() const { return m_fontData.size(); } hasVerticalAdvances()49 bool hasVerticalAdvances() const { return m_hasVerticalAdvances; } 50 clear()51 void clear() 52 { 53 m_fontData.clear(); 54 m_glyphs.clear(); 55 m_advances.clear(); 56 m_hasVerticalAdvances = false; 57 } 58 glyphs(unsigned from)59 const Glyph* glyphs(unsigned from) const { return m_glyphs.data() + from; } advances(unsigned from)60 const FloatSize* advances(unsigned from) const { return m_advances.data() + from; } 61 fontDataAt(unsigned index)62 const SimpleFontData* fontDataAt(unsigned index) const { return m_fontData[index]; } 63 glyphAt(unsigned index)64 Glyph glyphAt(unsigned index) const 65 { 66 return m_glyphs[index]; 67 } 68 advanceAt(unsigned index)69 FloatSize advanceAt(unsigned index) const 70 { 71 return m_advances[index]; 72 } 73 add(Glyph glyph,const SimpleFontData * font,float width)74 void add(Glyph glyph, const SimpleFontData* font, float width) 75 { 76 m_fontData.append(font); 77 m_glyphs.append(glyph); 78 m_advances.append(FloatSize(width, 0)); 79 } 80 add(Glyph glyph,const SimpleFontData * font,const FloatSize & advance)81 void add(Glyph glyph, const SimpleFontData* font, const FloatSize& advance) 82 { 83 m_fontData.append(font); 84 m_glyphs.append(glyph); 85 m_advances.append(advance); 86 if (advance.height()) 87 m_hasVerticalAdvances = true; 88 } 89 reverse()90 void reverse() 91 { 92 m_fontData.reverse(); 93 m_glyphs.reverse(); 94 m_advances.reverse(); 95 } 96 setAdvanceWidth(unsigned index,float newWidth)97 void setAdvanceWidth(unsigned index, float newWidth) 98 { 99 m_advances[index].setWidth(newWidth); 100 } 101 expandLastAdvance(float width)102 void expandLastAdvance(float width) 103 { 104 ASSERT(!isEmpty()); 105 FloatSize& lastAdvance = m_advances.last(); 106 lastAdvance.setWidth(lastAdvance.width() + width); 107 } 108 109 private: 110 Vector<const SimpleFontData*, 2048> m_fontData; 111 Vector<Glyph, 2048> m_glyphs; 112 Vector<FloatSize, 2048> m_advances; 113 bool m_hasVerticalAdvances; 114 }; 115 116 } // namespace blink 117 118 #endif 119