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