protected override void ReadContentFrom(BinaryReader reader)
{
uint tableOffset = this.Header.Offset;
GlyphLocations locations = this.GlyphLocations;
int glyphCount = locations.GlyphCount;
_glyphs = new TtfGlyph[glyphCount];
List <int> compositeGlyphs = new List <int>();
for (int i = 0; i < glyphCount; i++)
{
reader.BaseStream.Seek(tableOffset + locations.Offsets[i], SeekOrigin.Begin);//reset
uint length = locations.Offsets[i + 1] - locations.Offsets[i];
if (length > 0)
{
//https://www.microsoft.com/typography/OTSPEC/glyf.htm
//header,
//Type Name Description
//SHORT numberOfContours If the number of contours is greater than or equal to zero, this is a single glyph; if negative, this is a composite glyph.
//SHORT xMin Minimum x for coordinate data.
//SHORT yMin Minimum y for coordinate data.
//SHORT xMax Maximum x for coordinate data.
//SHORT yMax Maximum y for coordinate data.
short contoursCount = reader.ReadInt16();
if (contoursCount >= 0)
{
Bounds bounds = Utils.ReadBounds(reader);
_glyphs[i] = ReadSimpleGlyph(reader, contoursCount, bounds);
}
else
{
//skip composite glyph,
//resolve later
compositeGlyphs.Add(i);
}
}
else
{
_glyphs[i] = TtfGlyph.Empty;
}
}
//--------------------------------
//resolve composte glyphs
//--------------------------------
foreach (int glyphIndex in compositeGlyphs)
{
#if DEBUG
if (glyphIndex == 7)
{
}
#endif
_glyphs[glyphIndex] = ReadCompositeGlyph(_glyphs, reader, tableOffset, glyphIndex);
}
}
public Glyf(GlyphLocations glyphLocations)
{
_glyphLocations = glyphLocations;
}
public Glyf(GlyphLocations glyphLocations)
{
this.GlyphLocations = glyphLocations;
}