157 #define alpha_composite(composite, fg, alpha, bg) {               \  argument
159                 (ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128);  \
242 } bg[] = {  variable
260 static int num_bgpat = sizeof(bg) / sizeof(struct background_pattern);
841     int invert_gradient2 = (bg[pat].type & 0x08);  in rpng2_win_load_bg_image()
864     if ((bg[pat].type & 0x07) == 0) {  in rpng2_win_load_bg_image()
865         uch r1_min  = rgb[bg[pat].rgb1_min].r;  in rpng2_win_load_bg_image()
866         uch g1_min  = rgb[bg[pat].rgb1_min].g;  in rpng2_win_load_bg_image()
867         uch b1_min  = rgb[bg[pat].rgb1_min].b;  in rpng2_win_load_bg_image()
868         uch r2_min  = rgb[bg[pat].rgb2_min].r;  in rpng2_win_load_bg_image()
869         uch g2_min  = rgb[bg[pat].rgb2_min].g;  in rpng2_win_load_bg_image()
870         uch b2_min  = rgb[bg[pat].rgb2_min].b;  in rpng2_win_load_bg_image()
871         int r1_diff = rgb[bg[pat].rgb1_max].r - r1_min;  in rpng2_win_load_bg_image()
872         int g1_diff = rgb[bg[pat].rgb1_max].g - g1_min;  in rpng2_win_load_bg_image()
873         int b1_diff = rgb[bg[pat].rgb1_max].b - b1_min;  in rpng2_win_load_bg_image()
874         int r2_diff = rgb[bg[pat].rgb2_max].r - r2_min;  in rpng2_win_load_bg_image()
875         int g2_diff = rgb[bg[pat].rgb2_max].g - g2_min;  in rpng2_win_load_bg_image()
876         int b2_diff = rgb[bg[pat].rgb2_max].b - b2_min;  in rpng2_win_load_bg_image()
901                   (even_odd_horiz && (bg[pat].type & 0x10));  in rpng2_win_load_bg_image()
933     } else if ((bg[pat].type & 0x07) == 1) {  in rpng2_win_load_bg_image()
938         r1 = rgb[bg[pat].rgb1_max].r;  in rpng2_win_load_bg_image()
939         g1 = rgb[bg[pat].rgb1_max].g;  in rpng2_win_load_bg_image()
940         b1 = rgb[bg[pat].rgb1_max].b;  in rpng2_win_load_bg_image()
941         r2 = rgb[bg[pat].rgb2_max].r;  in rpng2_win_load_bg_image()
942         g2 = rgb[bg[pat].rgb2_max].g;  in rpng2_win_load_bg_image()
943         b2 = rgb[bg[pat].rgb2_max].b;  in rpng2_win_load_bg_image()
967     } else if ((bg[pat].type & 0x07) == 2) {  in rpng2_win_load_bg_image()
989         grayspot = CLIP(bg[pat].bg_gray, 1, (hh + hw));  in rpng2_win_load_bg_image()
990         freq = MAX((double)bg[pat].bg_freq, 0.0);  in rpng2_win_load_bg_image()
991         saturate = (double)bg[pat].bg_bsat * 0.1;  in rpng2_win_load_bg_image()
992         rotate = (double)bg[pat].bg_brot * 0.1;  in rpng2_win_load_bg_image()