public static GlyphFont GetFont(PortableFontDesc typeface)
{
lock (FontCache)
{
if (FontCache.ContainsKey(typeface))
{
return(FontCache[typeface]);
}
}
var fontFlags = System.Drawing.FontStyle.Regular;
if (typeface.IsItalic)
{
fontFlags |= System.Drawing.FontStyle.Italic;
}
if (typeface.IsBold)
{
fontFlags |= System.Drawing.FontStyle.Bold;
}
var font = new GlyphFont
{
Typeface = new Typeface(new FontFamily(typeface.FontName),
typeface.IsItalic ? FontStyles.Italic : FontStyles.Normal,
typeface.IsBold ? FontWeights.Bold : FontWeights.Normal,
FontStretches.Normal),
EmSize = typeface.EmSize,
Font = new Font(typeface.FontName, typeface.EmSize * 76.0f / 92.0f, fontFlags),
IsClearType = typeface.IsClearType,
};
font.Typeface.TryGetGlyphTypeface(out font.GlyphTypeface);
lock (FontCache)
{
FontCache[typeface] = font;
}
return(font);
}
public static int DrawString(this WriteableBitmap bmp, int x0, int y0, IntRect cliprect, Color fontColor, Color?bgColor, GlyphFont font, string text)
{
if (text == null)
{
return(0);
}
int dx = 0, dy = 0;
var textwi = 0;
using (var context = bmp.GetBitmapContext())
{
foreach (var ch in text)
{
if (ch == '\n')
{
if (dx > textwi)
{
textwi = dx;
}
dx = 0;
dy += font.TextHeight;
}
if (x0 + dx <= cliprect.Right)
{
if (font.IsClearType)
{
if (!bgColor.HasValue)
{
throw new Exception("Clear type fonts must have background specified");
}
var letter = font.GetClearTypeLetter(ch, fontColor, bgColor.Value);
if (letter == null)
{
continue;
}
context.DrawLetter(x0 + dx, y0 + dy, cliprect, letter);
dx += letter.Width;
}
else
{
var letter = font.GetGrayScaleLetter(ch);
if (letter == null)
{
continue;
}
context.DrawLetter(x0 + dx, y0 + dy, cliprect, fontColor, letter);
dx += letter.Width;
}
}
}
}
if (dx > textwi)
{
textwi = dx;
}
return(textwi);
}
public static int DrawString(this WriteableBitmap bmp, int x0, int y0, IntRect cliprect, Color fontColor, GlyphFont font, string text)
{
return(DrawString(bmp, x0, y0, cliprect, fontColor, null, font, text));
}
public static int DrawString(this WriteableBitmap bmp, int x0, int y0, IntRect cliprect, Color fontColor, Color?bgColor, GlyphFont font, string text, bool vertical = false)
{
if (vertical)
{
return(DrawStringVertical(bmp, x0, y0, cliprect, fontColor, null, font, text));
}
else
{
return(DrawString(bmp, x0, y0, cliprect, fontColor, null, font, text));
}
}
