/// <summary>
/// Evaluates how complex the GlyphMapping is.
/// </summary>
GlyphIndicesComplexity CalcGlyphIndicesComplexity()
{
GlyphIndicesComplexity result = GlyphIndicesComplexity.None;
int count = this.glyphMapping != null ? this.glyphMapping.Length : 0;
for (int idx = 0; idx < count; idx++)
{
GlyphMapping gm = this.glyphMapping[idx];
if (gm.ClusterCodeUnitCount > 1 || gm.ClusterGlyphCount > 1)
{
// Max. complexity -> break
result = GlyphIndicesComplexity.ClusterMapping;
break;
}
if (gm.GlyphIndex != -1 && (int)result < (int)GlyphIndicesComplexity.GlyphIndicesAndDistanceOnly)
{
result = GlyphIndicesComplexity.GlyphIndicesAndDistanceOnly;
continue;
}
if ((int)result < (int)GlyphIndicesComplexity.GlyphIndicesAndDistanceOnly)
{
if (!DoubleUtil.IsNaN(gm.AdvanceWidth) || !DoubleUtil.IsNaN(gm.UOffset) || !DoubleUtil.IsNaN(gm.VOffset))
{
result = GlyphIndicesComplexity.DistanceOnly;
continue;
}
}
}
return(result);
}
// ...on the way to handle Indices...
private void WriteGlyphsInternal(Glyphs glyphs, string text)
{
GlyphIndicesComplexity complexity = GlyphIndicesComplexity.None;
if (glyphs.Indices != null)
{
complexity = glyphs.Indices.Complexity;
}
complexity = GlyphIndicesComplexity.ClusterMapping;
switch (complexity)
{
case GlyphIndicesComplexity.None:
break;
case GlyphIndicesComplexity.DistanceOnly:
WriteGlyphs_DistanceOnly(glyphs);
break;
case GlyphIndicesComplexity.GlyphIndicesAndDistanceOnly:
break;
case GlyphIndicesComplexity.ClusterMapping:
WriteGlyphs_ClusterMapping(glyphs);
break;
}
}
