1 /*

     2  *

     3  * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved

     4  *

     5  */

     6 

     7 #ifndef __MORPHTABLES_H

     8 #define __MORPHTABLES_H

     9 

    10 /**

    11  * \file

    12  * \internal

    13  */

    14 

    15 #include "LETypes.h"

    16 #include "LayoutTables.h"

    17 

    18 U_NAMESPACE_BEGIN

    19 

    20 class LEGlyphStorage;

    21 

    22 typedef le_uint32 FeatureFlags;

    23 

    24 typedef le_int16 FeatureType;

    25 typedef le_int16 FeatureSetting;

    26 

    27 struct FeatureTableEntry

    28 {

    29     FeatureType     featureType;

    30     FeatureSetting  featureSetting;

    31     FeatureFlags    enableFlags;

    32     FeatureFlags    disableFlags;

    33 };

    34 

    35 struct ChainHeader

    36 {

    37     FeatureFlags        defaultFlags;

    38     le_uint32           chainLength;

    39     le_int16           nFeatureEntries;

    40     le_int16           nSubtables;

    41     FeatureTableEntry   featureTable[ANY_NUMBER];

    42 };

    43 

    44 struct MorphTableHeader

    45 {

    46     le_int32    version;

    47     le_uint32   nChains;

    48     ChainHeader chains[ANY_NUMBER];

    49 

    50     void process(LEGlyphStorage &glyphStorage) const;

    51 };

    52 

    53 typedef le_int16 SubtableCoverage;

    54 

    55 enum SubtableCoverageFlags

    56 {

    57     scfVertical = 0x8000,

    58     scfReverse  = 0x4000,

    59     scfIgnoreVt = 0x2000,

    60     scfReserved = 0x1FF8,

    61     scfTypeMask = 0x0007

    62 };

    63 

    64 enum MorphSubtableType

    65 {

    66     mstIndicRearrangement               = 0,

    67     mstContextualGlyphSubstitution      = 1,

    68     mstLigatureSubstitution             = 2,

    69     mstReservedUnused                   = 3,

    70     mstNonContextualGlyphSubstitution   = 4,

    71     mstContextualGlyphInsertion         = 5

    72 };

    73 

    74 struct MorphSubtableHeader

    75 {

    76     le_int16           length;

    77     SubtableCoverage    coverage;

    78     FeatureFlags        subtableFeatures;

    79 

    80     void process(LEGlyphStorage &glyphStorage) const;

    81 };

    82 

    83 U_NAMESPACE_END

    84 #endif

    85