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GlyphIterator.h

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00001 /*
00002  * @(#)GlyphIterator.h  1.9 00/03/15
00003  *
00004  * (C) Copyright IBM Corp. 1998, 1999, 2000 - All Rights Reserved
00005  *
00006  */
00007 
00008 #ifndef __GLYPHITERATOR_H
00009 #define __GLYPHITERATOR_H
00010 
00011 #include "LETypes.h"
00012 #include "OpenTypeTables.h"
00013 #include "GlyphDefinitionTables.h"
00014 #include "GlyphPositionAdjustments.h"
00015 
00016 class GlyphIterator
00017 {
00018 public:
00019     GlyphIterator(LEGlyphID *theGlyphs, GlyphPositionAdjustment *theGlyphPositionAdjustments, le_int32 theGlyphCount,
00020         le_bool rightToLeft, le_uint16 theLookupFlags, LETag theFeatureTag, const LETag *theGlyphTags[],
00021         GlyphDefinitionTableHeader *theGlyphDefinitionTableHeader);
00022 
00023     GlyphIterator(GlyphIterator &that);
00024 
00025     GlyphIterator(GlyphIterator &that, le_uint16 newLookupFlags);
00026 
00027     ~GlyphIterator();
00028 
00029     le_bool next(le_uint32 delta = 1);
00030     le_bool prev(le_uint32 delta = 1);
00031     le_bool findFeatureTag();
00032 
00033     le_bool isRightToLeft();
00034 
00035     LEGlyphID getCurrGlyphID();
00036     le_int32  getCurrStreamPosition();
00037     void   getCurrGlyphPositionAdjustment(GlyphPositionAdjustment& adjustment);
00038 
00039     le_int32  getMarkComponent(le_int32 markPosition);
00040 
00041     void setCurrGlyphID(LEGlyphID glyphID);
00042     void setCurrStreamPosition(le_int32 position);
00043     void setCurrGlyphPositionAdjustment(const GlyphPositionAdjustment *adjustment);
00044     void adjustCurrGlyphPositionAdjustment(float xPlacmentAdjust, float yPlacementAdjust,
00045                                            float xAdvanceAdjust, float yAdvanceAdjust);
00046 
00047 private:
00048     GlyphIterator();
00049     le_bool filterGlyph(le_uint32 index);
00050     le_bool hasFeatureTag();
00051     le_bool nextInternal(le_uint32 delta = 1);
00052     le_bool prevInternal(le_uint32 delta = 1);
00053 
00054     le_int32  direction;
00055     le_int32  position;
00056     le_int32  nextLimit;
00057     le_int32  prevLimit;
00058     LEGlyphID *glyphs;
00059     GlyphPositionAdjustment *glyphPositionAdjustments;
00060     le_uint16 lookupFlags;
00061     LETag    featureTag;
00062     const LETag **glyphTags;
00063     GlyphClassDefinitionTable *glyphClassDefinitionTable;
00064     MarkAttachClassDefinitionTable *markAttachClassDefinitionTable;
00065 };
00066 
00067 #endif

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