public unsafe bool Apply(
IOpenTypeFont Font,
FontTable Table,
int CharCount,
UshortList Charmap, // Character to glyph map
GlyphInfoList GlyphInfo, // List of GlyphInfo
ushort LookupFlags, // Lookup flags for glyph lookups
int FirstGlyph, // where to apply it
int AfterLastGlyph, // how long is a context we can use
out int NextGlyph // Next glyph to process
)
{
NextGlyph = FirstGlyph + 1; // in case we don't match
if (Format(Table) != 1) return false; //unknown format
int oldGlyphCount=GlyphInfo.Length;
ushort glyphId = GlyphInfo.Glyphs[FirstGlyph];
int coverageIndex = Coverage(Table).GetGlyphIndex(Table,glyphId);
if (coverageIndex==-1) return false;
MultipleSubstitutionSequenceTable sequence = Sequence(Table,coverageIndex);
ushort sequenceLength = sequence.GlyphCount(Table);
int lengthDelta = sequenceLength - 1;
if (sequenceLength==0)
{
// This is illegal, because mapping will be broken -
// corresponding char will be lost. Just leave it as it is.
// (char will be attached to the following glyph).
GlyphInfo.Remove(FirstGlyph,1);
}
else
{
ushort firstChar = GlyphInfo.FirstChars[FirstGlyph];
ushort ligatureCount = GlyphInfo.LigatureCounts[FirstGlyph];
if (lengthDelta > 0)
{
GlyphInfo.Insert(FirstGlyph,lengthDelta);
}
//put glyphs in place
for(ushort gl=0; gl<sequenceLength; gl++)
{
GlyphInfo.Glyphs[FirstGlyph + gl] = sequence.Glyph(Table,gl);
GlyphInfo.GlyphFlags[FirstGlyph + gl] =
(ushort)(GlyphFlags.Unresolved | GlyphFlags.Substituted);
GlyphInfo.FirstChars[FirstGlyph + gl] = firstChar;
GlyphInfo.LigatureCounts[FirstGlyph + gl] = ligatureCount;
}
}
//Fix char mapping - very simple for now.
// Works only for arabic base+mark -> base and marks decomposition
//
for(int ch=0;ch<CharCount;ch++)
{
if (Charmap[ch]>FirstGlyph) Charmap[ch] = (ushort)(Charmap[ch]+lengthDelta);
}
NextGlyph = FirstGlyph + lengthDelta + 1;
return true;
}
public unsafe bool Apply(
IOpenTypeFont Font,
FontTable Table,
int CharCount,
UshortList Charmap, // Character to glyph map
GlyphInfoList GlyphInfo, // List of GlyphInfo
ushort LookupFlags, // Lookup flags for glyph lookups
int FirstGlyph, // where to apply it
int AfterLastGlyph, // how long is a context we can use
out int NextGlyph // Next glyph to process
)
{
NextGlyph = FirstGlyph + 1; // in case we don't match
if (Format(Table) != 1)
{
return(false); //unknown format
}
int oldGlyphCount = GlyphInfo.Length;
ushort glyphId = GlyphInfo.Glyphs[FirstGlyph];
int coverageIndex = Coverage(Table).GetGlyphIndex(Table, glyphId);
if (coverageIndex == -1)
{
return(false);
}
MultipleSubstitutionSequenceTable sequence = Sequence(Table, coverageIndex);
ushort sequenceLength = sequence.GlyphCount(Table);
int lengthDelta = sequenceLength - 1;
if (sequenceLength == 0)
{
// This is illegal, because mapping will be broken -
// corresponding char will be lost. Just leave it as it is.
// (char will be attached to the following glyph).
GlyphInfo.Remove(FirstGlyph, 1);
}
else
{
ushort firstChar = GlyphInfo.FirstChars[FirstGlyph];
ushort ligatureCount = GlyphInfo.LigatureCounts[FirstGlyph];
if (lengthDelta > 0)
{
GlyphInfo.Insert(FirstGlyph, lengthDelta);
}
//put glyphs in place
for (ushort gl = 0; gl < sequenceLength; gl++)
{
GlyphInfo.Glyphs[FirstGlyph + gl] = sequence.Glyph(Table, gl);
GlyphInfo.GlyphFlags[FirstGlyph + gl] =
(ushort)(GlyphFlags.Unresolved | GlyphFlags.Substituted);
GlyphInfo.FirstChars[FirstGlyph + gl] = firstChar;
GlyphInfo.LigatureCounts[FirstGlyph + gl] = ligatureCount;
}
}
// Fix char mapping - very simple for now.
// Works only for arabic base+mark -> base and marks decomposition
// Needs work for full mapping
for (int ch = 0; ch < CharCount; ch++)
{
if (Charmap[ch] > FirstGlyph)
{
Charmap[ch] = (ushort)(Charmap[ch] + lengthDelta);
}
}
NextGlyph = FirstGlyph + lengthDelta + 1;
return(true);
}
public unsafe bool Apply(
IOpenTypeFont Font,
FontTable Table,
int CharCount,
UshortList Charmap, // Character to glyph map
GlyphInfoList GlyphInfo, // List of GlyphInfo
ushort LookupFlags, // Lookup flags for glyph lookups
int FirstGlyph, // where to apply it
int AfterLastGlyph, // how long is a context we can use
out int NextGlyph // Next glyph to process
)
{
Invariant.Assert(FirstGlyph>=0);
Invariant.Assert(AfterLastGlyph<=GlyphInfo.Length);
NextGlyph = FirstGlyph + 1; //In case we don't match;
if (Format(Table) != 1) return false; // Unknown format
int glyphCount=GlyphInfo.Length;
ushort glyphId = GlyphInfo.Glyphs[FirstGlyph];
int CoverageIndex = Coverage(Table).GetGlyphIndex(Table,glyphId);
if (CoverageIndex==-1) return false;
int curGlyph;
ushort ligatureGlyph=0;
bool match = false;
ushort compCount=0;
LigatureSetTable ligatureSet = LigatureSet(Table,(ushort)CoverageIndex);
ushort ligaCount = ligatureSet.LigatureCount(Table);
for(ushort liga=0; liga<ligaCount; liga++)
{
LigatureTable ligature = ligatureSet.Ligature(Table,liga);
compCount = ligature.ComponentCount(Table);
if (compCount == 0)
{
throw new FileFormatException();
}
curGlyph=FirstGlyph;
ushort comp=1;
for(comp=1;comp<compCount;comp++)
{
curGlyph = LayoutEngine.GetNextGlyphInLookup(Font,GlyphInfo,curGlyph+1,LookupFlags,LayoutEngine.LookForward);
if (curGlyph>=AfterLastGlyph) break;
if (GlyphInfo.Glyphs[curGlyph]!=ligature.Component(Table,comp)) break;
}
if (comp==compCount) //liga matched
{
match=true;
ligatureGlyph = ligature.LigatureGlyph(Table);
break; //Liga found
}
}
//If no ligature found, match will remain false after last iteration
if (match)
{
//Fix character and glyph Mapping
//PERF: localize ligature character range
//Calculate Ligature CharCount
int totalLigaCharCount=0;
int firstLigaChar=int.MaxValue;
curGlyph=FirstGlyph;
for(ushort comp=0;comp<compCount;comp++)
{
Invariant.Assert(curGlyph<AfterLastGlyph);
int curFirstChar = GlyphInfo.FirstChars[curGlyph];
int curLigaCount = GlyphInfo.LigatureCounts[curGlyph];
totalLigaCharCount += curLigaCount;
if (curFirstChar<firstLigaChar) firstLigaChar=curFirstChar;
curGlyph = LayoutEngine.GetNextGlyphInLookup(Font,GlyphInfo,curGlyph+1,LookupFlags,LayoutEngine.LookForward);
}
curGlyph=FirstGlyph;
int prevGlyph=FirstGlyph;
ushort shift=0;
for(ushort comp=1;comp<=compCount;comp++)
{
prevGlyph=curGlyph;
if (comp<compCount)
{
curGlyph = LayoutEngine.
GetNextGlyphInLookup(Font,GlyphInfo,
curGlyph+1,
LookupFlags,
LayoutEngine.LookForward);
}
else curGlyph = GlyphInfo.Length; // to the end from last component
// Set charmap for ligature component
for(int curChar=0; curChar<CharCount; curChar++)
{
if (Charmap[curChar]==prevGlyph)
{
Charmap[curChar] = (ushort)FirstGlyph;
}
}
//Shift glyphInfo
if (shift>0)
{
for(int glyph=prevGlyph+1; glyph<curGlyph; glyph++)
{
GlyphInfo.Glyphs[glyph-shift] = GlyphInfo.Glyphs[glyph];
GlyphInfo.GlyphFlags[glyph-shift] = GlyphInfo.GlyphFlags[glyph];
GlyphInfo.FirstChars[glyph-shift] = GlyphInfo.FirstChars[glyph];
GlyphInfo.LigatureCounts[glyph-shift] = GlyphInfo.LigatureCounts[glyph];
}
if (curGlyph-prevGlyph>1) //do fixing only if have glyphs in between
{
for(int curChar=0; curChar<CharCount; curChar++)
{
ushort curCharmap = Charmap[curChar];
if (curCharmap>prevGlyph && curCharmap<curGlyph)
{
Charmap[curChar] -= shift;
}
}
}
}
++shift;
}
//Place new glyph into position of first ligature glyph
GlyphInfo.Glyphs[FirstGlyph] = ligatureGlyph;
GlyphInfo.GlyphFlags[FirstGlyph] = (ushort)(GlyphFlags.Unresolved | GlyphFlags.Substituted);
GlyphInfo.FirstChars[FirstGlyph] = (ushort)firstLigaChar;
GlyphInfo.LigatureCounts[FirstGlyph] = (ushort)totalLigaCharCount;
//remove empty space
if (compCount > 1)
{
GlyphInfo.Remove(GlyphInfo.Length-compCount+1,compCount-1);
}
NextGlyph=prevGlyph-(compCount-1)+1;
}
return match;
}
public unsafe bool Apply(
IOpenTypeFont Font,
FontTable Table,
int CharCount,
UshortList Charmap, // Character to glyph map
GlyphInfoList GlyphInfo, // List of GlyphInfo
ushort LookupFlags, // Lookup flags for glyph lookups
int FirstGlyph, // where to apply it
int AfterLastGlyph, // how long is a context we can use
out int NextGlyph // Next glyph to process
)
{
Invariant.Assert(FirstGlyph >= 0);
Invariant.Assert(AfterLastGlyph <= GlyphInfo.Length);
NextGlyph = FirstGlyph + 1; //In case we don't match;
if (Format(Table) != 1)
{
return(false); // Unknown format
}
int glyphCount = GlyphInfo.Length;
ushort glyphId = GlyphInfo.Glyphs[FirstGlyph];
int CoverageIndex = Coverage(Table).GetGlyphIndex(Table, glyphId);
if (CoverageIndex == -1)
{
return(false);
}
int curGlyph;
ushort ligatureGlyph = 0;
bool match = false;
ushort compCount = 0;
LigatureSetTable ligatureSet = LigatureSet(Table, (ushort)CoverageIndex);
ushort ligaCount = ligatureSet.LigatureCount(Table);
for (ushort liga = 0; liga < ligaCount; liga++)
{
LigatureTable ligature = ligatureSet.Ligature(Table, liga);
compCount = ligature.ComponentCount(Table);
if (compCount == 0)
{
throw new FileFormatException();
}
curGlyph = FirstGlyph;
ushort comp = 1;
for (comp = 1; comp < compCount; comp++)
{
curGlyph = LayoutEngine.GetNextGlyphInLookup(Font, GlyphInfo, curGlyph + 1, LookupFlags, LayoutEngine.LookForward);
if (curGlyph >= AfterLastGlyph)
{
break;
}
if (GlyphInfo.Glyphs[curGlyph] != ligature.Component(Table, comp))
{
break;
}
}
if (comp == compCount) //liga matched
{
match = true;
ligatureGlyph = ligature.LigatureGlyph(Table);
break; //Liga found
}
}
//If no ligature found, match will remain false after last iteration
if (match)
{
//Fix character and glyph Mapping
//PERF: localize ligature character range
//Calculate Ligature CharCount
int totalLigaCharCount = 0;
int firstLigaChar = int.MaxValue;
curGlyph = FirstGlyph;
for (ushort comp = 0; comp < compCount; comp++)
{
Invariant.Assert(curGlyph < AfterLastGlyph);
int curFirstChar = GlyphInfo.FirstChars[curGlyph];
int curLigaCount = GlyphInfo.LigatureCounts[curGlyph];
totalLigaCharCount += curLigaCount;
if (curFirstChar < firstLigaChar)
{
firstLigaChar = curFirstChar;
}
curGlyph = LayoutEngine.GetNextGlyphInLookup(Font, GlyphInfo, curGlyph + 1, LookupFlags, LayoutEngine.LookForward);
}
curGlyph = FirstGlyph;
int prevGlyph = FirstGlyph;
ushort shift = 0;
for (ushort comp = 1; comp <= compCount; comp++)
{
prevGlyph = curGlyph;
if (comp < compCount)
{
curGlyph = LayoutEngine.
GetNextGlyphInLookup(Font, GlyphInfo,
curGlyph + 1,
LookupFlags,
LayoutEngine.LookForward);
}
else
{
curGlyph = GlyphInfo.Length; // to the end from last component
}
// Set charmap for ligature component
for (int curChar = 0; curChar < CharCount; curChar++)
{
if (Charmap[curChar] == prevGlyph)
{
Charmap[curChar] = (ushort)FirstGlyph;
}
}
//Shift glyphInfo
if (shift > 0)
{
for (int glyph = prevGlyph + 1; glyph < curGlyph; glyph++)
{
GlyphInfo.Glyphs[glyph - shift] = GlyphInfo.Glyphs[glyph];
GlyphInfo.GlyphFlags[glyph - shift] = GlyphInfo.GlyphFlags[glyph];
GlyphInfo.FirstChars[glyph - shift] = GlyphInfo.FirstChars[glyph];
GlyphInfo.LigatureCounts[glyph - shift] = GlyphInfo.LigatureCounts[glyph];
}
if (curGlyph - prevGlyph > 1) //do fixing only if have glyphs in between
{
for (int curChar = 0; curChar < CharCount; curChar++)
{
ushort curCharmap = Charmap[curChar];
if (curCharmap > prevGlyph && curCharmap < curGlyph)
{
Charmap[curChar] -= shift;
}
}
}
}
++shift;
}
//Place new glyph into position of first ligature glyph
GlyphInfo.Glyphs[FirstGlyph] = ligatureGlyph;
GlyphInfo.GlyphFlags[FirstGlyph] = (ushort)(GlyphFlags.Unresolved | GlyphFlags.Substituted);
GlyphInfo.FirstChars[FirstGlyph] = (ushort)firstLigaChar;
GlyphInfo.LigatureCounts[FirstGlyph] = (ushort)totalLigaCharCount;
//remove empty space
if (compCount > 1)
{
GlyphInfo.Remove(GlyphInfo.Length - compCount + 1, compCount - 1);
}
NextGlyph = prevGlyph - (compCount - 1) + 1;
}
return(match);
}