27 XFERMODE(SrcOut)  { return     s.approxMulDiv255(d.alphas().inv()); }  in XFERMODE()
28 XFERMODE(SrcOver) { return s + d.approxMulDiv255(s.alphas().inv()); }  in XFERMODE()
34 XFERMODE(SrcATop) { return (s * d.alphas() + d * s.alphas().inv()).div255(); }  in XFERMODE()
37 XFERMODE(Xor) { return (s * d.alphas().inv() + d * s.alphas().inv()).div255(); }  in XFERMODE()
46     return s + d.approxMulDiv255(s.inv());  in XFERMODE()
48 XFERMODE(Multiply) { return (s * d.alphas().inv() + d * s.alphas().inv() + s*d).div255(); }  in XFERMODE()
73     auto srcover = s + (d * sa.inv()).div255();  in XFERMODE()
79          both = s*da.inv() + d*sa.inv();  in XFERMODE()
94     auto srcover = s + (d * sa.inv()).div255(),  in XFERMODE()
95          dstover = d + (s * da.inv()).div255();  in XFERMODE()
107     auto srcover = s + (d * sa.inv()).div255(),  in XFERMODE()
108          dstover = d + (s * da.inv()).div255();  in XFERMODE()
192     return (bw * aa + d * aa.inv()).div255();  in xfer_aa()