x displacement of the pixel m units away, at an angle of d, from an arbitrary center
Syntax
r2x(d,m)
Original Machine Code (in OPER resource) of Filter Factory 3.0 and 3.0.4 for Photoshop/Win32
| 58 | pop eax (param_m) | . |
| 5B | pop ebx (param_d) | . |
| 81 E3 FF 03 00 00 | and ebx,$000003ff (1023) | param_m %= 1024; // param_m &= 0x3FF; |
| 0F BF 9C 5F 78 05 00 00 | movsx ebx,[edi+ebx*2+$00000578] (COS_LOOKUP) | param_d = COS_LOOKUP[param_d]; |
| F7 EB | imul ebx | edx:eax = param_b * param_d |
| 05 FF 1F 00 00 | add eax,$00001fff (8191) | param_m += 0x1FFF; |
| 83 D2 00 | adc edx,$00 (0) | if (cf is set) edx++ |
| 0F AC D0 0E | shrd eax,edx,$0e (14) | Shift EAX right by 14 bits Store lower 14 bits of EDX into the upper 14 bits of EAX |
| 50 | push eax | return param_m; |
int factory_r2x(int d, int m) {
int eax = m;
int ebx = d;
ebx &= 1023;
ebx = COS_LOOKUP[ebx];
eax = (((int64_t)eax * (int64_t)ebx) + 8191) >> 14;
return eax;
}