public static GlyphShapingClass GetGlyphShapingClass(FontMetrics fontMetrics, ushort glyphId, GlyphShapingData shapingData)
{
bool isMark;
bool isBase;
bool isLigature;
ushort markAttachmentType = 0;
if (fontMetrics.TryGetGlyphClass(glyphId, out GlyphClassDef? glyphClass))
{
isMark = glyphClass == GlyphClassDef.MarkGlyph;
isBase = glyphClass == GlyphClassDef.BaseGlyph;
isLigature = glyphClass == GlyphClassDef.LigatureGlyph;
if (fontMetrics.TryGetMarkAttachmentClass(glyphId, out GlyphClassDef? markAttachmentClass))
{
markAttachmentType = (ushort)markAttachmentClass;
}
}
else
{
// TODO: We may have to store each codepoint. FontKit checks all.
isMark = CodePoint.IsMark(shapingData.CodePoint);
isBase = !isMark;
isLigature = shapingData.CodePointCount > 1;
}
return(new GlyphShapingClass(isMark, isBase, isLigature, markAttachmentType));
}
public static bool IsMarkGlyph(FontMetrics fontMetrics, ushort glyphId, GlyphShapingData shapingData)
{
if (!fontMetrics.TryGetGlyphClass(glyphId, out GlyphClassDef? glyphClass) &&
!CodePoint.IsMark(shapingData.CodePoint))
{
return(false);
}
if (glyphClass != GlyphClassDef.MarkGlyph)
{
return(false);
}
return(true);
}