Function pixcmapConvertTo8

deps/leptonica/src/colormap.c:1552–1574

! * \brief pixcmapConvertTo8() * * \param[in] cmaps colormap for 2 bpp or 4 bpp pix * \return cmapd (8 bpp) * * * Notes: * (1) This converts a 2 bpp or 4 bpp colormap to 8 bpp. The colors * are the same; the output colormap entry array has size 256. * */

 * </pre>
 */
PIXCMAP *
pixcmapConvertTo8(PIXCMAP  *cmaps)
{
l_int32   i, n, depth, rval, gval, bval;
PIXCMAP  *cmapd;

    PROCNAME("pixcmapConvertTo8");

    if (!cmaps)
        return (PIXCMAP *)ERROR_PTR("cmaps not defined", procName, NULL);
    depth = pixcmapGetDepth(cmaps);
    if (depth == 8) return pixcmapCopy(cmaps);
    if (depth != 2 && depth != 4)
        return (PIXCMAP *)ERROR_PTR("cmaps not 2 or 4 bpp", procName, NULL);

    cmapd = pixcmapCreate(8);
    n = pixcmapGetCount(cmaps);
    for (i = 0; i < n; i++) {
        pixcmapGetColor(cmaps, i, &rval, &gval, &bval);
        pixcmapAddColor(cmapd, rval, gval, bval);
    }
    return cmapd;
}


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