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, Color fontColor, Color?bgColor, PortableFontDesc typeface, string text)
{
var font = GetFont(typeface);
return(bmp.DrawString(x0, y0, new IntRect(new IntPoint(0, 0), new IntSize(bmp.PixelWidth, bmp.PixelHeight)), fontColor, bgColor, font, text));
}
public static int DrawString(this WriteableBitmap bmp, int x0, int y0, IntRect cliprect, Color fontColor, PortableFontDesc typeface, string text)
{
var font = GetFont(typeface);
return(bmp.DrawString(x0, y0, cliprect, fontColor, font, text));
}
public static int DrawStringVertical(this WriteableBitmap bmp, int x0, int y0, Color fontColor, PortableFontDesc typeface, string text, Boolean topToBottom)
{
IntRect cliprect = new IntRect(new IntPoint(0, 0), new IntSize(bmp.PixelWidth, bmp.PixelHeight));
var font = GetFont(typeface);
if (text == null)
{
return(0);
}
int dx = 0;
int dy = 0;
int textwi = 0;
using (var context = bmp.GetBitmapContext())
{
int dyDirection = 1;
if (topToBottom == false)
{
dyDirection = -1;
}
foreach (char ch in text)
{
if (ch == '\n')
{
if (dy > textwi)
{
textwi = dy;
}
dy = 0;
dx += font.TextHeight * dyDirection;
}
if (y0 + dy <= cliprect.Bottom)
{
var letter = font.GetGrayScaleLetter(ch);
if (letter == null)
{
continue;
}
context.DrawLetterVertical(x0 + dx, y0 + dy, cliprect, fontColor, letter, topToBottom);
dy += letter.Width * dyDirection;
}
}
}
if (dx > textwi)
{
textwi = dx;
}
return(textwi);
}
