icuSources/layout/ValueRecords.h

   1 /*
   2  *
   3  * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
   4  *
   5  */
   6
   7 #ifndef __VALUERECORDS_H
   8 #define __VALUERECORDS_H
   9
  10 /**
  11  * \file
  12  * \internal
  13  */
  14
  15 #include "LETypes.h"
  16 #include "LEFontInstance.h"
  17 #include "OpenTypeTables.h"
  18 #include "GlyphIterator.h"
  19 #include "GlyphPositionAdjustments.h"
  20
  21 U_NAMESPACE_BEGIN
  22
  23 typedef le_uint16 ValueFormat;
  24 typedef le_int16 ValueRecordField;
  25
  26 struct ValueRecord
  27 {
  28     le_int16   values[ANY_NUMBER];
  29
  30     le_int16   getFieldValue(ValueFormat valueFormat, ValueRecordField field) const;
  31     le_int16   getFieldValue(le_int16 index, ValueFormat valueFormat, ValueRecordField field) const;
  32     void    adjustPosition(ValueFormat valueFormat, const char *base, GlyphPositionAdjustment &positionAdjustment,
  33                 const LEFontInstance *fontInstance) const;
  34     void    adjustPosition(le_int16 index, ValueFormat valueFormat, const char *base, GlyphPositionAdjustment &positionAdjustment,
  35                 const LEFontInstance *fontInstance) const;
  36
  37     static le_int16    getSize(ValueFormat valueFormat);
  38
  39 private:
  40     static le_int16    getFieldCount(ValueFormat valueFormat);
  41     static le_int16    getFieldIndex(ValueFormat valueFormat, ValueRecordField field);
  42 };
  43
  44 enum ValueRecordFields
  45 {
  46     vrfXPlacement   = 0,
  47     vrfYPlacement   = 1,
  48     vrfXAdvance     = 2,
  49     vrfYAdvance     = 3,
  50     vrfXPlaDevice   = 4,
  51     vrfYPlaDevice   = 5,
  52     vrfXAdvDevice   = 6,
  53     vrfYAdvDevice   = 7
  54 };
  55
  56 enum ValueFormatBits
  57 {
  58     vfbXPlacement   = 0x0001,
  59     vfbYPlacement   = 0x0002,
  60     vfbXAdvance     = 0x0004,
  61     vfbYAdvance     = 0x0008,
  62     vfbXPlaDevice   = 0x0010,
  63     vfbYPlaDevice   = 0x0020,
  64     vfbXAdvDevice   = 0x0040,
  65     vfbYAdvDevice   = 0x0080,
  66     vfbReserved     = 0xFF00,
  67     vfbAnyDevice    = vfbXPlaDevice + vfbYPlaDevice + vfbXAdvDevice + vfbYAdvDevice
  68 };
  69
  70 U_NAMESPACE_END
  71 #endif
  72
  73