public void DrawText(Bitmap bitmap, string text, float x, float y)
{
if (UseInterpreter)
{
interpreter.ppem = FontSize;
InterpretPrep();
}
context.UseInterpreter = UseInterpreter;
context.UseBitmapGlyph = UseBitmapGlyph;
context.DX = x;
context.DY = y;
context.FontSize = FontSize;
context.Bitmap = bitmap;
context.Graphics = Graphics.FromImage(bitmap);
context.Graphics.SmoothingMode = SmoothingMode.HighQuality;
HmtxTable hmtx = font.Tables.hmtx;
GlyfTable glyf = font.Tables.glyf;
char highSurrogate = '\0';
int length = text.Length;
for (int i = 0; i < length; i++)
{
char charCode = text[i];
if (char.IsHighSurrogate(charCode))
{
highSurrogate = charCode;
continue;
}
int codePoint;
if (char.IsLowSurrogate(charCode))
{
codePoint = char.ConvertToUtf32(highSurrogate, charCode);
}
else
{
codePoint = charCode;
}
context.CodePoint = codePoint;
context.GlyphId = font.GetGlyphId(codePoint);
if (hmtx != null)
{
context.hMetric = hmtx.GetMetric(context.GlyphId);
}
if (glyf != null)
{
context.Glyph = glyf.GetGlyph(context.GlyphId);
if (context.Glyph == null)
{
//context.GlyphId = 0;
//context.Glyph = glyf.GetGlyph(0);
if (hmtx != null)
{
//context.hMetric = hmtx.GetMetric(0);
}
}
}
DrawGlyph(context);
}
context.Reset();
}
