Mixture of a and b by fraction n/d.
The definition is: a*n/d+b*(d-n)/d
Syntax
mix(a,b,n,d)
Original Machine Code (in OPER resource) of Filter Factory 3.0 and 3.0.4 for Photoshop/Win32
| 5B | pop ebx (param_d) | . |
| 59 | pop ecx (param_n) | . |
| 5A | pop edx (param_b) | . |
| 5E | pop esi (param_a) | . |
| 0B DB | or ebx,ebx | . |
| B8 00 00 00 00 | mov eax,$00000000 (0) | res = 0; |
| 74 12 | jz +$12 (@@1) | if (param_d == 0) goto @@1; // return 0 |
| 8B C3 | mov eax,ebx | res = param_d; |
| 2B C1 | sub eax,ecx | res -= param_n; |
| F7 EA | imul edx | res *= param_b; |
| F7 FB | idiv ebx | res /= param_d; |
| 8B E8 | mov ebp,eax | ebp = res; |
| 8B C1 | mov eax,ecx | res = param_n; |
| F7 EE | imul esi | res *= param_a; |
| F7 FB | idiv ebx | res /= param_d; |
| 03 C5 | add eax,ebp | res += ebp; // res = param_n * param_a / param_d + (param_d - param_n) * param_b / param_d |
| @@1: | @@1: | |
| 50 | push eax | return res; |