RGB_FRAC          138 gd/libgd/webpimg.c     kVToR[i] = (89858 * (i - 128) + RGB_HALF) >> RGB_FRAC;
RGB_FRAC          141 gd/libgd/webpimg.c     kUToB[i] = (113618 * (i - 128) + RGB_HALF) >> RGB_FRAC;
RGB_FRAC          144 gd/libgd/webpimg.c     const int j = ((i - 16) * 76283 + RGB_HALF) >> RGB_FRAC;
RGB_FRAC          153 gd/libgd/webpimg.c   const int g_off = (kVToG[v] + kUToG[u]) >> RGB_FRAC;