sum_b             495 ext/gd/libgd/webpimg.c     const int sum_b =
sum_b             504 ext/gd/libgd/webpimg.c     *u_dst++ = GetChromaU(sum_r, sum_g, sum_b);
sum_b             505 ext/gd/libgd/webpimg.c     *v_dst++ = GetChromaV(sum_r, sum_g, sum_b);
sum_b             516 ext/gd/libgd/webpimg.c     const int sum_b = GetBlue(rgb_line1) + GetBlue(rgb_line2);
sum_b             520 ext/gd/libgd/webpimg.c     *u_dst = GetChromaU(2 * sum_r, 2 * sum_g, 2 * sum_b);
sum_b             521 ext/gd/libgd/webpimg.c     *v_dst = GetChromaV(2 * sum_r, 2 * sum_g, 2 * sum_b);