1 /* 2 * Copyright (C) 2007, 2008, 2009, 2010 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef UniscribeController_h 27 #define UniscribeController_h 28 29 #include <usp10.h> 30 #include "Font.h" 31 #include "GlyphBuffer.h" 32 #include "Vector.h" 33 34 namespace WebCore { 35 36 class UniscribeController { 37 public: 38 UniscribeController(const Font*, const TextRun&, HashSet<const SimpleFontData*>* fallbackFonts = 0); 39 40 // Advance and measure/place up to the specified character. 41 void advance(unsigned to, GlyphBuffer* = 0); 42 43 // Compute the character offset for a given x coordinate. 44 int offsetForPosition(int x, bool includePartialGlyphs); 45 46 // Returns the width of everything we've consumed so far. 47 float runWidthSoFar() const { return m_runWidthSoFar; } 48 49 float minGlyphBoundingBoxX() const { return m_minGlyphBoundingBoxX; } 50 float maxGlyphBoundingBoxX() const { return m_maxGlyphBoundingBoxX; } 51 float minGlyphBoundingBoxY() const { return m_minGlyphBoundingBoxY; } 52 float maxGlyphBoundingBoxY() const { return m_maxGlyphBoundingBoxY; } 53 54 private: 55 void resetControlAndState(); 56 57 void itemizeShapeAndPlace(const UChar*, unsigned length, const SimpleFontData*, GlyphBuffer*); 58 bool shapeAndPlaceItem(const UChar*, unsigned index, const SimpleFontData*, GlyphBuffer*); 59 bool shape(const UChar* str, int len, SCRIPT_ITEM item, const SimpleFontData* fontData, 60 Vector<WORD>& glyphs, Vector<WORD>& clusters, 61 Vector<SCRIPT_VISATTR>& visualAttributes); 62 63 const Font& m_font; 64 const TextRun& m_run; 65 HashSet<const SimpleFontData*>* m_fallbackFonts; 66 FloatPoint m_glyphOrigin; 67 float m_minGlyphBoundingBoxX; 68 float m_maxGlyphBoundingBoxX; 69 float m_minGlyphBoundingBoxY; 70 float m_maxGlyphBoundingBoxY; 71 72 SCRIPT_CONTROL m_control; 73 SCRIPT_STATE m_state; 74 Vector<SCRIPT_ITEM> m_items; 75 76 unsigned m_currentCharacter; 77 int m_end; 78 79 float m_runWidthSoFar; 80 float m_padding; 81 float m_padPerSpace; 82 83 bool m_computingOffsetPosition; 84 bool m_includePartialGlyphs; 85 float m_offsetX; 86 int m_offsetPosition; 87 }; 88 89 } 90 #endif 91
