bool GetFace(uint codepoint, out uint index, out IntPtr face)
{
//use our font!
index = FT.FT_Get_Char_Index(facePtr, codepoint);
if (index != 0)
{
face = facePtr;
return(true);
}
//try fallback font
if (context.Fallback == IntPtr.Zero)
{
face = IntPtr.Zero;
return(false);
}
FT.FT_Set_Char_Size(context.Fallback,
FTMath.To26Dot6(0),
size26d6,
0,
96
);
index = FT.FT_Get_Char_Index(context.Fallback, codepoint);
if (index != 0)
{
face = context.Fallback;
return(true);
}
//none of the fonts have this mysterious character
face = IntPtr.Zero;
return(false);
}
public Font(FontContext ctx, string filename, float size)
{
context = ctx;
size26d6 = FTMath.To26Dot6(size);
if (!File.Exists(filename))
{
throw new FileNotFoundException("Font not found " + filename, filename);
}
var err = FT.FT_New_Face(context.Library, filename, 0, out facePtr);
if (err != 0)
{
throw new Exception("Freetype Error");
}
FT.FT_Set_Char_Size(facePtr,
FTMath.To26Dot6(0),
size26d6,
0,
96
);
//get metrics
var faceRec = Marshal.PtrToStructure <FT.FaceRec> (facePtr);
var szRec = Marshal.PtrToStructure <FT.SizeRec> (faceRec.size);
lineHeight = (int)FTMath.From26Dot6(szRec.metrics.height);
pages.Add(new Texture(
PAGE_SIZE, PAGE_SIZE
));
//Rasterize standard ASCII
for (int i = 32; i < 127; i++)
{
AddCharacter((uint)i);
}
}
