1038 #define mult_chan(src, dst, Fa, Fb) MIN ((src) * (Fa) + (dst) * (Fb), 1.0)  in calc_op()  argument
1040     double Fa, Fb;  in calc_op()  local
1092 	    Fa = 1.0;  in calc_op()
1094 	    Fa = MIN (1.0, (1.0 - dsta) / srca);  in calc_op()
1095 	return mult_chan (src, dst, Fa, 1.0);  in calc_op()
1106 	    Fa = 0.0;  in calc_op()
1108 	    Fa = MAX (0.0, 1.0 - (1.0 - dsta) / srca);  in calc_op()
1109 	return mult_chan (src, dst, Fa, 0.0);  in calc_op()
1120 	    Fa = 1.0;  in calc_op()
1122 	    Fa = MIN (1.0, (1.0 - dsta) / srca);  in calc_op()
1123 	return mult_chan (src, dst, Fa, 0.0);  in calc_op()
1134 	    Fa = 0.0;  in calc_op()
1136 	    Fa = MAX (0.0, 1.0 - (1.0 - dsta) / srca);  in calc_op()
1141 	return mult_chan (src, dst, Fa, Fb);  in calc_op()
1145 	    Fa = 1.0;  in calc_op()
1147 	    Fa = MIN (1.0, (1.0 - dsta) / srca);  in calc_op()
1152 	return mult_chan (src, dst, Fa, Fb);  in calc_op()
1156 	    Fa = 1.0;  in calc_op()
1158 	    Fa = MIN (1.0, (1.0 - dsta) / srca);  in calc_op()
1163 	return mult_chan (src, dst, Fa, Fb);  in calc_op()
1174 	    Fa = 0.0;  in calc_op()
1176 	    Fa = MAX (0.0, 1.0 - dsta / srca);  in calc_op()
1177 	return mult_chan (src, dst, Fa, 1.0);  in calc_op()
1181 	    Fa = 1.0;  in calc_op()
1183 	    Fa = MIN (1.0, dsta / srca);  in calc_op()
1184 	return mult_chan (src, dst, Fa, 0.0);  in calc_op()
1195 	    Fa = 0.0;  in calc_op()
1197 	    Fa = MAX (0.0, 1.0 - dsta / srca);  in calc_op()
1198 	return mult_chan (src, dst, Fa, 0.0);  in calc_op()
1209 	    Fa = 1.0;  in calc_op()
1211 	    Fa = MIN (1.0, dsta / srca);  in calc_op()
1216 	return mult_chan (src, dst, Fa, Fb);  in calc_op()
1220 	    Fa = 0.0;  in calc_op()
1222 	    Fa = MAX (0.0, 1.0 - dsta / srca);  in calc_op()
1227 	return mult_chan (src, dst, Fa, Fb);  in calc_op()
1231 	    Fa = 0.0;  in calc_op()
1233 	    Fa = MAX (0.0, 1.0 - dsta / srca);  in calc_op()
1238 	return mult_chan (src, dst, Fa, Fb);  in calc_op()