public void DoSubstitution(IGlyphIndexList glyphIndexList)
{
// Rebuild tables if configuration changed
if (_mustRebuildTables)
{
RebuildTables();
_mustRebuildTables = false;
}
// Iterate over lookups, then over glyphs, as explained in the spec:
// "During text processing, a client applies a lookup to each glyph
// in the string before moving to the next lookup."
// https://www.microsoft.com/typography/otspec/gsub.htm
foreach (GSubLkContext lookupCtx in _lookupTables)
{
GSUB.LookupTable lookupTable = lookupCtx.lookup;
lookupCtx.SetGlyphCount(glyphIndexList.Count);
for (int pos = 0; pos < glyphIndexList.Count; ++pos)
{
if (!lookupCtx.WillCheckThisGlyph(pos))
{
continue;
}
lookupTable.DoSubstitutionAt(glyphIndexList, pos, glyphIndexList.Count - pos);
}
}
}
public void DoSubstitution(IGlyphIndexList outputCodePoints)
{
if (lookupTables == null)
{
return;
} //early exit if no lookup tables
//
//load
for (int pos = 0; pos < outputCodePoints.Count; ++pos)
{
bool hasChanged = false;
foreach (GSUB.LookupTable lookupTable in lookupTables)
{
if (!EnableLigation &&
lookupTable.ForUseWithFeatureId == Features.liga.shortname)
{
//skip this feature
continue;
}
if (lookupTable.DoSubstitutionAt(outputCodePoints, pos, outputCodePoints.Count - pos))
{
hasChanged = true;
}
}
if (!hasChanged)
{
++pos;
}
}
}
public void DoSubstitution(IGlyphIndexList outputCodePoints)
{
if (lookupTables == null)
{
return;
} //early exit if no lookup tables
//
//load
int j = lookupTables.Count;
for (int i = 0; i < j; ++i)
{
GSUB.LookupTable lookupTable = lookupTables[i];
//
if (!EnableLigation &&
lookupTable.ForUseWithFeatureId == Features.liga.shortname)
{
//skip this feature
continue;
}
lookupTable.DoSubstitution(outputCodePoints, 0, outputCodePoints.Count);
}
}
public void DoSubstitution(IGlyphIndexList codePoints)
{
// Rebuild tables if configuration changed
if (_mustRebuildTables)
{
RebuildTables();
_mustRebuildTables = false;
}
// Iterate over lookups, then over glyphs, as explained in the spec:
// "During text processing, a client applies a lookup to each glyph
// in the string before moving to the next lookup."
// https://www.microsoft.com/typography/otspec/gsub.htm
foreach (GSUB.LookupTable lookupTable in _lookupTables)
{
for (int pos = 0; pos < codePoints.Count; ++pos)
{
lookupTable.DoSubstitutionAt(codePoints, pos, codePoints.Count - pos);
}
}
}
public abstract bool DoSubstitutionAt(IGlyphIndexList glyphIndices, int pos, int len);
public override bool DoSubstitutionAt(IGlyphIndexList glyphIndices, int pos, int len)
{
return(false);
}
public abstract void DoSubtitution(IGlyphIndexList glyphIndices, int startAt, int len);
