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os/textandloc/fontservices/textshaperplugin/IcuSource/layout/GlyphIterator.h
author sl
Tue, 10 Jun 2014 14:32:02 +0200
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib. 
     1 /*

     2  *

     3  * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved

     4  *

     5  */

     6 

     7 #ifndef __GLYPHITERATOR_H

     8 #define __GLYPHITERATOR_H

     9 

    10 /**

    11  * \file

    12  * \internal

    13  */

    14 

    15 #include "LETypes.h"

    16 #include "OpenTypeTables.h"

    17 #include "GlyphDefinitionTables.h"

    18 

    19 U_NAMESPACE_BEGIN

    20 

    21 class LEGlyphStorage;

    22 class GlyphPositionAdjustments;

    23 

    24 class GlyphIterator : public UMemory {

    25 public:

    26     GlyphIterator(LEGlyphStorage &theGlyphStorage, GlyphPositionAdjustments *theGlyphPositionAdjustments, le_bool rightToLeft, le_uint16 theLookupFlags, LETag theFeatureTag,

    27         const GlyphDefinitionTableHeader *theGlyphDefinitionTableHeader);

    28 

    29     GlyphIterator(GlyphIterator &that);

    30 

    31     GlyphIterator(GlyphIterator &that, LETag newFeatureTag);

    32 

    33     GlyphIterator(GlyphIterator &that, le_uint16 newLookupFlags);

    34 

    35     virtual ~GlyphIterator();

    36 

    37     void reset(le_uint16 newLookupFlags, LETag newFeatureTag);

    38 

    39     le_bool next(le_uint32 delta = 1);

    40     le_bool prev(le_uint32 delta = 1);

    41     le_bool findFeatureTag();

    42 

    43     le_bool isRightToLeft() const;

    44     le_bool ignoresMarks() const;

    45 

    46     le_bool baselineIsLogicalEnd() const;

    47 

    48     LEGlyphID getCurrGlyphID() const;

    49     le_int32  getCurrStreamPosition() const;

    50 

    51     le_int32  getMarkComponent(le_int32 markPosition) const;

    52     le_bool   findMark2Glyph();

    53 

    54     void getCursiveEntryPoint(LEPoint &entryPoint) const;

    55     void getCursiveExitPoint(LEPoint &exitPoint) const;

    56 

    57     void setCurrGlyphID(TTGlyphID glyphID);

    58     void setCurrStreamPosition(le_int32 position);

    59     void setCurrGlyphBaseOffset(le_int32 baseOffset);

    60     void adjustCurrGlyphPositionAdjustment(float xPlacementAdjust, float yPlacementAdjust,

    61                                            float xAdvanceAdjust,   float yAdvanceAdjust);

    62 

    63     void setCurrGlyphPositionAdjustment(float xPlacementAdjust, float yPlacementAdjust,

    64                                         float xAdvanceAdjust,   float yAdvanceAdjust);

    65 

    66     void setCursiveEntryPoint(LEPoint &entryPoint);

    67     void setCursiveExitPoint(LEPoint &exitPoint);

    68     void setCursiveGlyph();

    69 

    70     LEGlyphID *insertGlyphs(le_int32 count, LEErrorCode& success);

    71     le_int32 applyInsertions();

    72 

    73 private:

    74     le_bool filterGlyph(le_uint32 index) const;

    75     le_bool hasFeatureTag() const;

    76     le_bool nextInternal(le_uint32 delta = 1);

    77     le_bool prevInternal(le_uint32 delta = 1);

    78 

    79     le_int32  direction;

    80     le_int32  position;

    81     le_int32  nextLimit;

    82     le_int32  prevLimit;

    83 

    84     LEGlyphStorage &glyphStorage;

    85     GlyphPositionAdjustments *glyphPositionAdjustments;

    86     le_int32 srcIndex;

    87     le_int32 destIndex;

    88     le_uint16 lookupFlags;

    89     LETag    featureTag;

    90     const GlyphClassDefinitionTable *glyphClassDefinitionTable;

    91     const MarkAttachClassDefinitionTable *markAttachClassDefinitionTable;

    92 

    93     GlyphIterator &operator=(const GlyphIterator &other); // forbid copying of this class

    94 };

    95 

    96 U_NAMESPACE_END

    97 #endif
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