rf                131 ext/gd/libgd/gd_filter.c 	double rf,gf,bf;
rf                154 ext/gd/libgd/gd_filter.c 			rf = (double)r/255.0;
rf                155 ext/gd/libgd/gd_filter.c 			rf = rf-0.5;
rf                156 ext/gd/libgd/gd_filter.c 			rf = rf*contrast;
rf                157 ext/gd/libgd/gd_filter.c 			rf = rf+0.5;
rf                158 ext/gd/libgd/gd_filter.c 			rf = rf*255.0;
rf                172 ext/gd/libgd/gd_filter.c 			rf = (rf > 255.0)? 255.0 : ((rf < 0.0)? 0.0:rf);
rf                176 ext/gd/libgd/gd_filter.c 			new_pxl = gdImageColorAllocateAlpha(src, (int)rf, (int)gf, (int)bf, a);
rf                178 ext/gd/libgd/gd_filter.c 				new_pxl = gdImageColorClosestAlpha(src, (int)rf, (int)gf, (int)bf, a);