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ClassDef

This commit is contained in:
Behdad Esfahbod 2006-12-26 20:00:33 -05:00
parent 53502c6723
commit eb32e374f4
1 changed files with 97 additions and 24 deletions
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109
src/harfbuzz-ng.cc
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@ -244,8 +244,7 @@ struct TTCHeader {
* 0x00010000 or 0x00020000 */ * 0x00010000 or 0x00020000 */
ULONG numFonts; /* Number of fonts in TTC */ ULONG numFonts; /* Number of fonts in TTC */
ULONG offsetTable[]; /* Array of offsets to the OffsetTable for each font ULONG offsetTable[]; /* Array of offsets to the OffsetTable for each font
* from the beginning of the file. * from the beginning of the file */
* numFonts entries long. */
}; };
@ -328,7 +327,7 @@ struct ScriptList {
USHORT scriptCount; /* Number of ScriptRecords */ USHORT scriptCount; /* Number of ScriptRecords */
ScriptRecord scriptRecord[]; /* Array of ScriptRecords--listed alphabetically ScriptRecord scriptRecord[]; /* Array of ScriptRecords--listed alphabetically
* by ScriptTag. scriptCount entries long */ * by ScriptTag */
}; };
struct Script { struct Script {
@ -385,8 +384,7 @@ struct FeatureList {
USHORT featureCount; /* Number of FeatureRecords in this table */ USHORT featureCount; /* Number of FeatureRecords in this table */
FeatureRecord featureRecord[];/* Array of FeatureRecords--zero-based (first FeatureRecord featureRecord[];/* Array of FeatureRecords--zero-based (first
* feature has FeatureIndex = 0)--listed * feature has FeatureIndex = 0)--listed
* alphabetically by FeatureTag. featureCount * alphabetically by FeatureTag */
* entries long */
}; };
struct Feature { struct Feature {
@ -403,8 +401,7 @@ struct Feature {
* feature */ * feature */
USHORT lookupIndex[]; /* Array of LookupList indices for this USHORT lookupIndex[]; /* Array of LookupList indices for this
* feature--zero-based (first lookup is * feature--zero-based (first lookup is
* LookupListIndex = 0). lookupCount * LookupListIndex = 0) */
* entries long */
}; };
struct LookupList { struct LookupList {
@ -414,8 +411,7 @@ struct LookupList {
USHORT lookupCount; /* Number of lookups in this table */ USHORT lookupCount; /* Number of lookups in this table */
Offset lookupOffset[]; /* Array of offsets to Lookup tables--from Offset lookupOffset[]; /* Array of offsets to Lookup tables--from
* beginning of LookupList--zero based (first * beginning of LookupList--zero based (first
* lookup is Lookup index = 0). lookupCount * lookup is Lookup index = 0) */
* entries long */
}; };
struct LookupFlag : USHORT { struct LookupFlag : USHORT {
@ -441,8 +437,7 @@ struct Lookup {
USHORT lookupFlag; /* Lookup qualifiers */ USHORT lookupFlag; /* Lookup qualifiers */
USHORT subTableCount; /* Number of SubTables for this lookup */ USHORT subTableCount; /* Number of SubTables for this lookup */
Offset subTableOffset[];/* Array of offsets to SubTables-from Offset subTableOffset[];/* Array of offsets to SubTables-from
* beginning of Lookup table. subTableCount * beginning of Lookup table */
* entries long. */
}; };
/* /*
@ -453,7 +448,7 @@ struct CoverageFormat1 {
/* GlyphIDs, in sorted numerical order */ /* GlyphIDs, in sorted numerical order */
DEFINE_ARRAY_TYPE (GlyphID, glyphArray, glyphCount); DEFINE_ARRAY_TYPE (GlyphID, glyphArray, glyphCount);
inline unsigned int get_coverage (uint16_t glyph_id) const { inline int get_coverage (uint16_t glyph_id) const {
GlyphID gid (glyph_id); GlyphID gid (glyph_id);
// TODO: bsearch // TODO: bsearch
for (int i = 0; i < glyphCount; i++) for (int i = 0; i < glyphCount; i++)
@ -464,12 +459,12 @@ struct CoverageFormat1 {
USHORT coverageFormat; /* Format identifier--format = 1 */ USHORT coverageFormat; /* Format identifier--format = 1 */
USHORT glyphCount; /* Number of glyphs in the GlyphArray */ USHORT glyphCount; /* Number of glyphs in the GlyphArray */
GlyphID glyphArray[]; /* Array of GlyphIDs--in numerical GlyphID glyphArray[]; /* Array of GlyphIDs--in numerical order */
* order. glyphCount entries long */
}; };
struct CoverageRangeRecord { struct CoverageRangeRecord {
inline unsigned int get_coverage (uint16_t glyph_id) const {
inline int get_coverage (uint16_t glyph_id) const {
if (glyph_id >= start && glyph_id <= end) if (glyph_id >= start && glyph_id <= end)
return startCoverageIndex + (glyph_id - start); return startCoverageIndex + (glyph_id - start);
return -1; return -1;
@ -485,7 +480,7 @@ struct CoverageFormat2 {
/* CoverageRangeRecords, in sorted numerical start order */ /* CoverageRangeRecords, in sorted numerical start order */
DEFINE_ARRAY_TYPE (CoverageRangeRecord, rangeRecord, rangeCount); DEFINE_ARRAY_TYPE (CoverageRangeRecord, rangeRecord, rangeCount);
inline unsigned int get_coverage (uint16_t glyph_id) const { inline int get_coverage (uint16_t glyph_id) const {
// TODO: bsearch // TODO: bsearch
for (int i = 0; i < rangeCount; i++) { for (int i = 0; i < rangeCount; i++) {
int coverage = rangeRecord[i].get_coverage (glyph_id); int coverage = rangeRecord[i].get_coverage (glyph_id);
@ -496,7 +491,7 @@ struct CoverageFormat2 {
} }
USHORT coverageFormat; /* Format identifier--format = 2 */ USHORT coverageFormat; /* Format identifier--format = 2 */
USHORT rangeCount; /* Number of CoverRangeRecords */ USHORT rangeCount; /* Number of CoverageRangeRecords */
CoverageRangeRecord rangeRecord[]; /* Array of glyph ranges--ordered by CoverageRangeRecord rangeRecord[]; /* Array of glyph ranges--ordered by
* Start GlyphID. rangeCount entries * Start GlyphID. rangeCount entries
* long */ * long */
@ -514,7 +509,7 @@ struct Coverage {
} }
/* Returns -1 if not covered. */ /* Returns -1 if not covered. */
inline unsigned int get_coverage (uint16_t glyph_id) const { inline int get_coverage (uint16_t glyph_id) const {
switch (coverageFormat) { switch (coverageFormat) {
case 1: return ((const CoverageFormat1&)*this).get_coverage(glyph_id); case 1: return ((const CoverageFormat1&)*this).get_coverage(glyph_id);
case 2: return ((const CoverageFormat2&)*this).get_coverage(glyph_id); case 2: return ((const CoverageFormat2&)*this).get_coverage(glyph_id);
@ -525,6 +520,84 @@ struct Coverage {
USHORT coverageFormat; /* Format identifier */ USHORT coverageFormat; /* Format identifier */
}; };
/*
* Class Definition
*/
struct ClassDefFormat1 {
/* GlyphIDs, in sorted numerical order */
DEFINE_ARRAY_TYPE (USHORT, classValueArray, glyphCount);
inline int get_class (uint16_t glyph_id) const {
if (glyph_id >= startGlyph && glyph_id < startGlyph + glyphCount)
return classValueArray[glyph_id - startGlyph];
return 0;
}
USHORT classFormat; /* Format identifier--format = 1 */
GlyphID startGlyph; /* First GlyphID of the classValueArray */
USHORT glyphCount; /* Size of the classValueArray */
USHORT classValueArray[]; /* Array of Class Values--one per GlyphID */
};
struct ClassRangeRecord {
inline int get_class (uint16_t glyph_id) const {
if (glyph_id >= start && glyph_id <= end)
return classValue;
return 0;
}
GlyphID start; /* First GlyphID in the range */
GlyphID end; /* Last GlyphID in the range */
USHORT classValue; /* Applied to all glyphs in the range
*/
};
struct ClassDefFormat2 {
/* ClassRangeRecords, in sorted numerical start order */
DEFINE_ARRAY_TYPE (ClassRangeRecord, rangeRecord, rangeCount);
inline int get_class (uint16_t glyph_id) const {
// TODO: bsearch
for (int i = 0; i < rangeCount; i++) {
int classValue = rangeRecord[i].get_class (glyph_id);
if (classValue > 0)
return classValue;
}
return 0;
}
USHORT classFormat; /* Format identifier--format = 2 */
USHORT rangeCount; /* Number of Number of ClassRangeRecords */
ClassRangeRecord rangeRecord[]; /* Array of glyph ranges--ordered by
* Start GlyphID */
};
struct ClassDef {
DEFINE_NON_INSTANTIABLE(ClassDef);
inline unsigned int get_size (void) const {
switch (classFormat) {
case 1: return ((const ClassDefFormat1&)*this).get_size ();
case 2: return ((const ClassDefFormat2&)*this).get_size ();
default:return sizeof (ClassDef);
}
}
/* Returns 0 if not found. */
inline int get_class (uint16_t glyph_id) const {
switch (classFormat) {
case 1: return ((const ClassDefFormat1&)*this).get_class(glyph_id);
case 2: return ((const ClassDefFormat2&)*this).get_class(glyph_id);
default:return 0;
}
}
USHORT classFormat; /* Format identifier */
};