 compiled with FT_RASTER_OPTION_ANTI_ALIASING (providing a 5-levels anti-aliasing mode; this option must be set directly in &lsquo;ftraster.c&rsquo; and is undefined by default) accepts a single tag &lsquo;pal5&rsquo; to set its gray palette as a character string with 5&nbsp;elements. Consequently, the third and fourth argument are zero normally.</p>
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