protected override UIntPtr CreateFont(string faceName, int size, int weight, font_style italic, font_decoration decoration, ref font_metrics fm)
{
var fontId = new UIntPtr(++lastFontId);
var fontHolder = FontHolder.Create(faceName, size, weight, italic, decoration, ref fm);
fontCache.Add(fontId, fontHolder);
return(fontId);
}
public static FontHolder Create(string faceName, int size, int weight, font_style italic, font_decoration decoration, ref font_metrics fm)
{
var possibleFonts = faceName.Split(',').ToList();
possibleFonts.Add("Helvetica"); // Make sure there's a font in the list.
CTFont font = null;
foreach (var fontName in possibleFonts)
{
// faceName = faceName; // normalize between WPF and Mac for ways to reference custom fonts.
font = new CTFont(fontName.TrimEnd().Replace("./#", ""), size);
// Bold & italic are properties of the CTFont
var traits = CTFontSymbolicTraits.None;
if (italic == font_style.fontStyleItalic)
{
traits |= CTFontSymbolicTraits.Italic;
}
if (weight > 400)
{
traits |= CTFontSymbolicTraits.Bold;
}
font = font.WithSymbolicTraits(font.Size, traits, traits);
if (font != null)
{
break;
}
}
var strAttrs = new CTStringAttributes {
Font = font
};
// initial size must be unscaled when getting these metrics
fm.ascent = (int)Math.Round(font.AscentMetric);
fm.descent = (int)Math.Round(font.DescentMetric);
fm.height = (int)Math.Round(font.AscentMetric + font.DescentMetric);
fm.x_height = (int)Math.Round(font.XHeightMetric);
fm.draw_spaces = decoration.HasFlag(font_decoration.font_decoration_underline) || decoration.HasFlag(font_decoration.font_decoration_linethrough);
var fontHolder = new FontHolder
{
FaceName = faceName,
Size = size,
Attributes = strAttrs,
Decoration = decoration,
Weight = weight
};
return(fontHolder);
}