public static Glyph[] ParseGlyf(ByteReader reader, int[] locaOffsets)
{
var glyphs = new Glyph[locaOffsets.Length - 1];
// Go through all glyphs and resolve them, leaving composite glyphs for later.
var compositeGlyphParse = new List <CompositeGlyphRequest>();
ParallelWork.FastLoops(glyphs.Length, (start, end) =>
{
for (int i = start; i < end; i++)
{
var current = new Glyph();
glyphs[i] = current;
if (i > locaOffsets.Length)
{
continue;
}
int glyphOffset = locaOffsets[i];
int nextOffset = locaOffsets[i + 1];
// No data for glyph.
if (glyphOffset == nextOffset || glyphOffset >= reader.Data.Length)
{
current.Vertices = new GlyphVertex[0];
continue;
}
ByteReader glyphData = reader.Branch(glyphOffset, true);
int numberOfContours = glyphData.ReadShortBE();
current.XMin = glyphData.ReadShortBE();
current.YMin = glyphData.ReadShortBE();
current.XMax = glyphData.ReadShortBE();
current.YMax = glyphData.ReadShortBE();
// Non-composite
if (numberOfContours > 0)
{
ResolveTtfGlyph(numberOfContours, glyphData, current);
}
// Composite
else if (numberOfContours == -1)
{
lock (compositeGlyphParse)
{
compositeGlyphParse.Add(new CompositeGlyphRequest(glyphData, current));
}
}
// 0 is an invalid value.
}
}).Wait();
// ReSharper disable once ImplicitlyCapturedClosure
ParallelWork.FastLoops(compositeGlyphParse.Count, (start, end) =>
{
for (int i = start; i < end; i++)
{
CompositeGlyphRequest request = compositeGlyphParse[i];
ResolveCompositeTtfGlyph(request.Reader, request.Glyph, glyphs);
}
});
Debug.Assert(glyphs.All(x => x != null));
return(glyphs);
}