82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
// Copyright (C) 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*
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* (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
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*
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*/
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#ifndef __ARABICSHAPING_H
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#define __ARABICSHAPING_H
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/**
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* \file
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* \internal
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*/
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#include "LETypes.h"
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#include "OpenTypeTables.h"
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U_NAMESPACE_BEGIN
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class LEGlyphStorage;
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class ArabicShaping /* not : public UObject because all methods are static */ {
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public:
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// Joining types
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enum JoiningTypes
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{
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JT_NON_JOINING = 0,
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JT_JOIN_CAUSING = 1,
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JT_DUAL_JOINING = 2,
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JT_LEFT_JOINING = 3,
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JT_RIGHT_JOINING = 4,
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JT_TRANSPARENT = 5,
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JT_COUNT = 6
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};
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// shaping bit masks
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enum ShapingBitMasks
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{
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MASK_SHAPE_RIGHT = 1, // if this bit set, shapes to right
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MASK_SHAPE_LEFT = 2, // if this bit set, shapes to left
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MASK_TRANSPARENT = 4, // if this bit set, is transparent (ignore other bits)
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MASK_NOSHAPE = 8 // if this bit set, don't shape this char, i.e. tatweel
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};
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// shaping values
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enum ShapeTypeValues
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{
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ST_NONE = 0,
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ST_RIGHT = MASK_SHAPE_RIGHT,
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ST_LEFT = MASK_SHAPE_LEFT,
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ST_DUAL = MASK_SHAPE_RIGHT | MASK_SHAPE_LEFT,
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ST_TRANSPARENT = MASK_TRANSPARENT,
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ST_NOSHAPE_DUAL = MASK_NOSHAPE | ST_DUAL,
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ST_NOSHAPE_NONE = MASK_NOSHAPE
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};
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typedef le_int32 ShapeType;
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static void shape(const LEUnicode *chars, le_int32 offset, le_int32 charCount, le_int32 charMax,
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le_bool rightToLeft, LEGlyphStorage &glyphStorage);
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static const FeatureMap *getFeatureMap(le_int32 &count);
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private:
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// forbid instantiation
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ArabicShaping();
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static ShapeType getShapeType(LEUnicode c);
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static const le_uint8 shapingTypeTable[];
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static const size_t shapingTypeTableLen;
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static const ShapeType shapeTypes[];
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static void adjustTags(le_int32 outIndex, le_int32 shapeOffset, LEGlyphStorage &glyphStorage);
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};
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U_NAMESPACE_END
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#endif
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