public SpriteFont(FontSize fontSize, TextureFilter filter = TextureFilter.Linear)
{
FamilyName = fontSize.Font.FamilyName;
StyleName = fontSize.Font.StyleName;
Size = fontSize.Size;
Ascent = fontSize.Ascent;
Descent = fontSize.Descent;
LineGap = fontSize.LineGap;
Height = fontSize.Height;
LineHeight = fontSize.LineHeight;
var packer = new Packer();
{
var bufferSize = (fontSize.Size * 2) * (fontSize.Size * 2);
var buffer = (bufferSize <= 16384 ? stackalloc Color[bufferSize] : new Color[bufferSize]);
foreach (var ch in fontSize.Charset.Values)
{
var name = ch.Unicode.ToString();
// pack bmp
if (fontSize.Render(ch.Unicode, buffer, out int w, out int h))
{
packer.AddPixels(name, w, h, buffer);
}
// create character
var sprChar = new Character(ch.Unicode, new Subtexture(), new Vector2(ch.OffsetX, ch.OffsetY), ch.Advance);
Charset.Add(ch.Unicode, sprChar);
// get all kerning
foreach (var ch2 in fontSize.Charset.Values)
{
var kerning = fontSize.GetKerning(ch.Unicode, ch2.Unicode);
if (Math.Abs(kerning) > 0.000001f)
{
sprChar.Kerning[ch2.Unicode] = kerning;
}
}
}
packer.Pack();
}
// link textures
var output = packer.Pack();
if (output != null)
{
for (int i = 0; i < output.Pages.Count; i++)
{
var texture = new Texture(output.Pages[i]);
texture.Filter = filter;
foreach (var entry in output.Entries.Values)
{
if (entry.Page != i)
{
continue;
}
if (Charset.TryGetValue(entry.Name[0], out var character))
{
character.Image.Reset(texture, entry.Source, entry.Frame);
}
}
}
}
}