maxTextureWidth

If you don't specify a maxTextureWidth, then a heuristic will choose a reasonable value based on the font size. So you can safely ignore this!

The glyphs will be arranged in a row from left to right until the row exceeds maxTextureWidth, and the next row will start. If you set this to a very large number, then all glyphs will be in a single row.

Do NOT call this after includeGlyphs.