FilterFactory - Function "rad"

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Channel z in the source image, which is m units away, at an angle of d, from the center of the image

Syntax

rad(d,m,z)

Synonyms

rad0
rad1

Original Machine Code (in OPER resource) of Filter Factory 3.0 and 3.0.4 for Photoshop/Win32

C++ code

int x = 999; // var['x'];
int X = 999; // var['X'];
int xmin = 0;
int y = 999; // var['y'];
int Y = 999; // var['Y'];
int ymin = 0;
int Z = 999; // var['Z'];
int zmin = 0;
int rowSize = 999;
uint8_t canvas[99999]; // RGBARGBARGBA...

int factory_rad(int d, int m, int z) {
	int esi, eax, ebx, ecx, edx;

	esi = z;
	eax = m;
	ebx = d;
	ebx &= 1023;
	ebx = COS_LOOKUP[ebx];
	eax = (((int64_t)eax * (int64_t)ebx) + 8191) >> 14;
	ecx = X;
	ecx -= xmin;
	ecx = ecx >> 1;
	ecx += eax;
	if (ecx < 0) {
		ecx = 0;
	}
	else {
		eax = X;
		if (ecx >= eax) {
			ecx = eax - 1;
		}
	}

	eax = m;
	ebx = d;
	ebx -= 256;
	ebx &= 1023;
	ebx = COS_LOOKUP[ebx];
	eax = (((int64_t)eax * (int64_t)ebx) + 8191) >> 14;
	ebx = Y;
	ebx -= ymin;
	ebx = ebx >> 1;
	ebx += eax;
	if (ebx < 0) {
		ebx = 0;
	}
	else {
		eax = Y;
		if (ebx >= eax) {
			ebx = eax - 1;
		}
	}

	// Now return pixel [x=ecx,y=ebx,z=esi] from the source image!
	edx = Z;
	edx -= zmin;
	ebx *= rowSize;
	ecx *= edx;
	ebx += ecx;
	eax = canvas[esi + ebx];
	return eax;
}