/* | |
* Copyright (C) 2007 Apple Inc. All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | |
* its contributors may be used to endorse or promote products derived | |
* from this software without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
#ifndef UniscribeController_h | |
#define UniscribeController_h | |
#include <usp10.h> | |
#include "Font.h" | |
#include "GlyphBuffer.h" | |
#include "Vector.h" | |
namespace WebCore { | |
class UniscribeController { | |
public: | |
UniscribeController(const Font*, const TextRun&, HashSet<const SimpleFontData*>* fallbackFonts = 0); | |
// Advance and measure/place up to the specified character. | |
void advance(unsigned to, GlyphBuffer* = 0); | |
// Compute the character offset for a given x coordinate. | |
int offsetForPosition(int x, bool includePartialGlyphs); | |
// Returns the width of everything we've consumed so far. | |
float runWidthSoFar() const { return m_runWidthSoFar; } | |
float minGlyphBoundingBoxX() const { return m_minGlyphBoundingBoxX; } | |
float maxGlyphBoundingBoxX() const { return m_maxGlyphBoundingBoxX; } | |
float minGlyphBoundingBoxY() const { return m_minGlyphBoundingBoxY; } | |
float maxGlyphBoundingBoxY() const { return m_maxGlyphBoundingBoxY; } | |
private: | |
void resetControlAndState(); | |
void itemizeShapeAndPlace(const UChar*, unsigned length, const SimpleFontData*, GlyphBuffer*); | |
bool shapeAndPlaceItem(const UChar*, unsigned index, const SimpleFontData*, GlyphBuffer*); | |
bool shape(const UChar* str, int len, SCRIPT_ITEM item, const SimpleFontData* fontData, | |
Vector<WORD>& glyphs, Vector<WORD>& clusters, | |
Vector<SCRIPT_VISATTR>& visualAttributes); | |
const Font& m_font; | |
const TextRun& m_run; | |
HashSet<const SimpleFontData*>* m_fallbackFonts; | |
FloatPoint m_glyphOrigin; | |
float m_minGlyphBoundingBoxX; | |
float m_maxGlyphBoundingBoxX; | |
float m_minGlyphBoundingBoxY; | |
float m_maxGlyphBoundingBoxY; | |
SCRIPT_CONTROL m_control; | |
SCRIPT_STATE m_state; | |
Vector<SCRIPT_ITEM> m_items; | |
unsigned m_currentCharacter; | |
int m_end; | |
float m_runWidthSoFar; | |
float m_padding; | |
float m_padPerSpace; | |
bool m_computingOffsetPosition; | |
bool m_includePartialGlyphs; | |
float m_offsetX; | |
int m_offsetPosition; | |
}; | |
} | |
#endif |