public Gdi32Font(string faceName, FontSizeUnit fontSizeUnit, float size, int weight, byte italic, byte underline, byte strikeOut, byte charSet, Gdi32FontQuality fontQuality)
: this(ToFontCacheKey(faceName, fontSizeUnit, size, new Gdi32FontStyleInfo(weight, italic, underline, strikeOut), charSet, fontQuality))
{
}
public Gdi32Font(string faceName, FontSizeUnit fontSizeUnit, float size, Gdi32FontStyleInfo fontStyle, byte charSet, Gdi32FontQuality fontQuality)
: this(ToFontCacheKey(faceName, fontSizeUnit, size, fontStyle, charSet, fontQuality))
{
}
public static Gdi32Font GetPoolingFont(string faceName, FontSizeUnit fontSizeUnit, float size, Gdi32FontStyleInfo fontStyle, byte charSet, Gdi32FontQuality fontQuality)
{
lock (FontCache)
{
var key = Gdi32Font.ToFontCacheKey(faceName, fontSizeUnit, size, fontStyle, charSet, fontQuality);
var font = new Gdi32Font(key);
for (var node = FontCache.First; node != null; node = node.Next)
{
if (node.Value.Key == key)
{
if (FontCache.First != node)
{
FontCache.Remove(node);
FontCache.AddFirst(node);
}
return(font);
}
}
FontCache.AddFirst(new FontCacheEntry(key, font));
while (FontCache.Count > 20)
{
var lastNode = FontCache.Last;
lastNode.Value.Font.Dispose();
FontCache.Remove(lastNode);
}
return(font);
}
}
internal static FontCacheKey ToFontCacheKey(string faceName, FontSizeUnit fontSizeUnit, float size, Gdi32FontStyleInfo fontStyle, byte charSet, Gdi32FontQuality fontQuality)
{
int height;
switch (fontSizeUnit)
{
case FontSizeUnit.Pixel:
height = (int)Math.Ceiling(size);
break;
case FontSizeUnit.DpiScaledPoint:
throw new NotSupportedException();
//height = (int)Math.Ceiling((double)((float)WindowsGraphicsCacheManager.MeasurementGraphics.DeviceContext.DpiY * size / 72f));
//break;
case FontSizeUnit.NonDpiScaledPoint:
height = (int)Math.Ceiling(96.0 * size / 72.0);
break;
default:
throw new ArgumentException(nameof(FontSizeUnit));
}
return(new FontCacheKey(faceName, height, fontStyle, charSet, fontQuality));
}
public static Gdi32Font GetPoolingFont(string faceName, FontSizeUnit fontSizeUnit, float size, int weight, byte italic, byte underline, byte strikeOut, byte charSet, Gdi32FontQuality fontQuality)
{
return(GetPoolingFont(faceName, fontSizeUnit, size, new Gdi32FontStyleInfo(weight, italic, underline, strikeOut), charSet, fontQuality));
}
