1 /* 2 * Copyright (C) 2007 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef UniscribeController_h 30 #define UniscribeController_h 31 32 #include <usp10.h> 33 #include "Font.h" 34 #include "GlyphBuffer.h" 35 #include "Vector.h" 36 37 namespace WebCore { 38 39 class UniscribeController { 40 public: 41 UniscribeController(const Font*, const TextRun&, HashSet<const SimpleFontData*>* fallbackFonts = 0); 42 43 // Advance and measure/place up to the specified character. 44 void advance(unsigned to, GlyphBuffer* = 0); 45 46 // Compute the character offset for a given x coordinate. 47 int offsetForPosition(int x, bool includePartialGlyphs); 48 49 // Returns the width of everything we've consumed so far. runWidthSoFar()50 float runWidthSoFar() const { return m_runWidthSoFar; } 51 52 private: 53 void resetControlAndState(); 54 55 void itemizeShapeAndPlace(const UChar*, unsigned length, const SimpleFontData*, GlyphBuffer*); 56 bool shapeAndPlaceItem(const UChar*, unsigned index, const SimpleFontData*, GlyphBuffer*); 57 bool shape(const UChar* str, int len, SCRIPT_ITEM item, const SimpleFontData* fontData, 58 Vector<WORD>& glyphs, Vector<WORD>& clusters, 59 Vector<SCRIPT_VISATTR>& visualAttributes); 60 61 const Font& m_font; 62 const TextRun& m_run; 63 HashSet<const SimpleFontData*>* m_fallbackFonts; 64 65 SCRIPT_CONTROL m_control; 66 SCRIPT_STATE m_state; 67 Vector<SCRIPT_ITEM> m_items; 68 69 unsigned m_currentCharacter; 70 int m_end; 71 72 float m_runWidthSoFar; 73 float m_padding; 74 float m_padPerSpace; 75 76 bool m_computingOffsetPosition; 77 bool m_includePartialGlyphs; 78 float m_offsetX; 79 int m_offsetPosition; 80 }; 81 82 } 83 #endif 84