kUToG             132 ext/gd/libgd/webpimg.c static int32_t kVToG[256], kUToG[256];
kUToG             139 ext/gd/libgd/webpimg.c     kUToG[i] = -22014 * (i - 128) + RGB_HALF;
kUToG             153 ext/gd/libgd/webpimg.c   const int g_off = (kVToG[v] + kUToG[u]) >> RGB_FRAC;