alpha_sum 2479 ext/gd/libgd/gd.c double alpha_factor, alpha_sum = 0.0, contrib_sum = 0.0; alpha_sum 2520 ext/gd/libgd/gd.c alpha_sum += alpha_factor; alpha_sum 2539 ext/gd/libgd/gd.c if ( alpha_sum != 0.0f) { alpha_sum 2541 ext/gd/libgd/gd.c alpha_sum /= contrib_sum; alpha_sum 2543 ext/gd/libgd/gd.c red /= alpha_sum; alpha_sum 2544 ext/gd/libgd/gd.c green /= alpha_sum; alpha_sum 2545 ext/gd/libgd/gd.c blue /= alpha_sum;