gf                131 ext/gd/libgd/gd_filter.c 	double rf,gf,bf;
gf                166 ext/gd/libgd/gd_filter.c 			gf = (double)g/255.0;
gf                167 ext/gd/libgd/gd_filter.c 			gf = gf-0.5;
gf                168 ext/gd/libgd/gd_filter.c 			gf = gf*contrast;
gf                169 ext/gd/libgd/gd_filter.c 			gf = gf+0.5;
gf                170 ext/gd/libgd/gd_filter.c 			gf = gf*255.0;
gf                173 ext/gd/libgd/gd_filter.c 			gf = (gf > 255.0)? 255.0 : ((gf < 0.0)? 0.0:gf);
gf                176 ext/gd/libgd/gd_filter.c 			new_pxl = gdImageColorAllocateAlpha(src, (int)rf, (int)gf, (int)bf, a);
gf                178 ext/gd/libgd/gd_filter.c 				new_pxl = gdImageColorClosestAlpha(src, (int)rf, (int)gf, (int)bf, a);