/// <summary>
/// Renders the Unicode character to a buffer at the Font Size, and returns true on success
/// </summary>
public unsafe bool Render(char unicode, Span <Color> buffer, out int width, out int height)
{
if (Charset.TryGetValue(unicode, out var ch) && ch.HasGlyph)
{
if (buffer.Length < ch.Width * ch.Height)
{
throw new Exception("Buffer provided isn't large enough to store rendered data");
}
if (Font.Disposed)
throw new Exception("Cannot get Font data as it is disposed");
fixed(Color *ptr = buffer)
{
// we actually use the bitmap buffer as our temporary buffer, and fill the pixels out backwards after
// kinda weird but it works & saves creating more memory
var input = (byte *)ptr;
StbTrueType.stbtt_MakeGlyphBitmap(Font.fontInfo, input, ch.Width, ch.Height, ch.Width, Scale, Scale, ch.Glyph);
for (int i = ch.Width * ch.Height - 1; i >= 0; i--)
{
ptr[i] = new Color(input[i], input[i], input[i], input[i]);
}
}
width = ch.Width;
height = ch.Height;
return(true);
}
width = height = 0;
return(false);
}
public static void __tt_renderGlyphBitmap(this StbTrueType.stbtt_fontinfo font, byte *output, int outWidth, int outHeight, int outStride, float scaleX, float scaleY, int glyph)
{
StbTrueType.stbtt_MakeGlyphBitmap(font, output, (int)(outWidth), (int)(outHeight), (int)(outStride), (float)(scaleX), (float)(scaleY), (int)(glyph));
}
