message: Don't try to draw transparent text, make it opaque
  issue
diff: @@ -380,6 +380,7 @@ export class WebGLRenderer {
  bgRGBA = tmp;
  }
  }
  + fgRGBA |= 0x000000ff;
  let coord: TextureCachedGlyph = null;
  if (normalizedCell.isLigature) {
  