/// <summary>
/// Get cached font if it exists in cache or null if it is not.
/// </summary>
PixelFarm.Drawing.FontInfo TryGetFont(string family, float size, System.Drawing.FontStyle style)
{
PixelFarm.Drawing.FontInfo fontInfo = null;
FontKey fontKey = new FontKey(family.ToLower(), size, style);
_fontInfoCacheByFontKey.TryGetValue(fontKey, out fontInfo);
return(fontInfo);
}
PixelFarm.Drawing.FontInfo RegisterFont(System.Drawing.Font newFont, FontKey fontKey)
{
//from ...
//1. http://msdn.microsoft.com/en-us/library/xwf9s90b%28v=vs.100%29.aspx
//3. Font metrics from http://msdn.microsoft.com/en-us/library/xwf9s90b(VS.71).aspx
//2. http://stackoverflow.com/questions/1006069/how-do-i-get-the-position-of-the-text-baseline-in-a-label-and-a-numericupdown
//cellHeight = font's ascent + descent
//linespacing = cellHeight + external leading
//em height (size)= cellHeight - internal leading
//-------------------
//evaluate this font, collect font matrix in pixel mode
PixelFarm.Drawing.FontInfo fontInfo;
if (!_fontInfoCache.TryGetValue(newFont, out fontInfo))
{
System.Drawing.FontFamily ff = newFont.FontFamily;
int lineSpacing = ff.GetLineSpacing(newFont.Style);
//font height is expensive call ****
int fontHeight = newFont.Height;
//convert descent
float fontSize = newFont.Size;
int fontEmHeight = newFont.FontFamily.GetEmHeight(newFont.Style);
int fontAscent = newFont.FontFamily.GetCellAscent(newFont.Style);
float descent = newFont.FontFamily.GetCellDescent(newFont.Style);
var myFont = new PixelFarm.Drawing.WinGdi.MyFont(newFont);
fontInfo = new PixelFarm.Drawing.WinGdi.MyFontInfo(
myFont,
fontHeight,
(fontAscent * fontSize / fontEmHeight),
(descent * fontSize / fontEmHeight),
fontHeight * fontAscent / lineSpacing,
gdiFontHelper);
myFont.SetFontInfo(fontInfo);
//lineSpacing * newFont.FontFamily.GetCellAscent(newFont.Style) / linespace);
//1. info
_fontInfoCache.Add(newFont, fontInfo);
_fontInfoCacheByFontKey.Add(fontKey, fontInfo);
_fontsUnmanagedCache[newFont] = newFont.ToHfont();
//2. line cache
_fontHeightCache[newFont] = fontHeight;
return(fontInfo);
}
return(fontInfo);
}
public static WinGdiFont GetWinGdiFont(RequestFont f)
{
if (f == null)
{
throw new NotSupportedException();
}
if (f == latestFont)
{
return(latestWinFont);
}
WinGdiFont actualFontInside = WinGdiFont.GetCacheFontAsWinGdiFont(f);
if (actualFontInside != null)
{
return(actualFontInside);
}
//-----
//need to create a new one
//get register font or create the new one
FontKey key = f.FontKey;
WinGdiFont found;
if (!registerFonts.TryGetValue(key, out found))
{
//create the new one and register
//create fontface
FontFaceKey fontfaceKey = new FontFaceKey(key);
WinGdiFontFace fontface;
if (!winGdiFonFaces.TryGetValue(fontfaceKey, out fontface))
{
//create new
fontface = new WinGdiFontFace(f);
winGdiFonFaces.Add(fontfaceKey, fontface);
}
found = (WinGdiFont)fontface.GetFontAtPointSize(f.SizeInPoints);
registerFonts.Add(key, found);//cache here
}
latestFont = f;
found.AssignToRequestFont(f);
return(latestWinFont = found);
}
public FontFaceKey(FontKey fontKey)
{
this.FontNameIndex = fontKey.FontNameIndex;
this.FontStyle = fontKey.FontStyle;
}
