ROUNDING
x = ((float)pattern_dh[k] + ROUNDING) - x0;
y = ((float)pattern_dv[k] + ROUNDING) - y0;
*color_offset++ = (uint8)(7.499 - 16.0 * (1.0 - delta) * (1.0 - delta) + ROUNDING);
color = (uint8)(32.0 * radius * radius + ROUNDING);
color = (uint8)(7.499 - 22.0 * (1.0 - delta) * (1.0 - delta) + ROUNDING);