protected override void GetGlyphPosImpl(ActualFont actualFont, char[] buffer,
int startAt, int len,
Fonts.ProperGlyph[] properGlyphs)
{
NativeFont nativeFont = actualFont as NativeFont;
if (nativeFont == null)
{
nativeFont = ResolveForNativeFont(actualFont);
}
unsafe
{
fixed (ProperGlyph* propGlyphH = &properGlyphs[0])
fixed (char* head = &buffer[0])
{
//we use font shaping engine here
NativeMyFontsLib.MyFtShaping(
nativeFont.NativeFontFace.HBFont,
head,
buffer.Length,
propGlyphH);
}
}
}
NativeFont ResolveForNativeFont(ActualFont actualFont)
{
NativeFont nativeFont;
FontFace fontface = actualFont.FontFace;
FontKey key = new FontKey(fontface.Name, actualFont.SizeInPoints, FontStyle.Regular);
if (specificFontSize.TryGetValue(key, out nativeFont))
{
return nativeFont;
}
//-----------------------------
//not native font
//if we need to use hardbuzz then
//create a native one for use
FontFace nativeFontFace;
if (!nativeFontFaces.TryGetValue(fontface.Name, out nativeFontFace))
{
//create new
nativeFontFace = FreeTypeFontLoader.LoadFont(fontface.FontPath, "en", HBDirection.HB_DIRECTION_LTR);
nativeFontFaces.Add(fontface.Name, nativeFontFace);
}
//check if we have native fontface for this font?
nativeFont = (NativeFont)nativeFontFace.GetFontAtPointsSize(actualFont.SizeInPoints);
specificFontSize.Add(key, nativeFont);
return nativeFont;
}
internal TextureFont(TextureFontFace typeface, float sizeInPoints)
{
this.typeface = typeface;
this.fontAtlas = typeface.FontAtlas;
actualFont = typeface.InnerFontFace.GetFontAtPointsSize(sizeInPoints);
}
public static void GetGlyphPos(ActualFont actualFont, char[] buffer, int startAt, int len, ProperGlyph[] properGlyphs)
{
defaultSharpingService.GetGlyphPosImpl(actualFont, buffer, startAt, len, properGlyphs);
}
protected abstract void GetGlyphPosImpl(ActualFont actualFont, char[] buffer, int startAt, int len, ProperGlyph[] properGlyphs);
protected static void SetCacheActualFont(RequestFont r, ActualFont a)
{
RequestFont.SetCacheActualFont(r, a);
}
public static void SetCacheActualFont(RequestFont r, ActualFont a)
{
s_actualFonts[r.FontKey] = a;
//throw new NotSupportedException();
//RequestFont.SetCacheActualFont(r, a);
}
protected static void SetCacheActualFont(RequestFont r, ActualFont a)
{
CacheFont.SetCacheActualFont(r, a);
//throw new NotSupportedException();
//RequestFont.SetCacheActualFont(r, a);
}
internal static void SetCacheActualFont(RequestFont r, ActualFont f)
{
r._actualFont = f;
}
internal TextureFont(TextureFontFace typeface, float sizeInPoints)
{
this.typeface = typeface;
this.fontAtlas = typeface.FontAtlas;
actualFont = typeface.InnerFontFace.GetFontAtPointsSize(sizeInPoints);
}
protected override void GetGlyphPosImpl(ActualFont actualFont, char[] buffer, int startAt, int len, ProperGlyph[] properGlyphs)
{
//do shaping and set text layout
}
protected static void SetCacheActualFont(RequestFont r, ActualFont a)
{
RequestFont.SetCacheActualFont(r, a);
}
public static void GetGlyphPos(ActualFont actualFont, char[] buffer, int startAt, int len, GlyphPlanList properGlyphs)
{
defaultSharpingService.GetGlyphPosImpl(actualFont, buffer, startAt, len, properGlyphs);
}
protected abstract void GetGlyphPosImpl(ActualFont actualFont, char[] buffer, int startAt, int len, GlyphPlanList properGlyphs);
