shithub: qk1

ref: b36001c95a510ec4f6c8e8613ec09283135dc9fd
dir: /cmprocess.c/

#include "quakedef.h"
#include "colormatrix.h"

void
cmprocess(s16int cm[4*4], void *in_, void *out_, int n)
{
	pixel_t *in, *out;
	int i;

	in = in_;
	out = out_;
	for(i = 0; i < n; i++, in++){
		s32int x[4] = {
			(*in>>0)&0xff,
			(*in>>8)&0xff,
			(*in>>16)&0xff,
			0xff,
		};
		s32int y[4] = {
			(x[0]*cm[4*0+0] + x[1]*cm[4*0+1] + x[2]*cm[4*0+2] + x[3]*cm[4*0+3])/CM(1),
			(x[0]*cm[4*1+0] + x[1]*cm[4*1+1] + x[2]*cm[4*1+2] + x[3]*cm[4*1+3])/CM(1),
			(x[0]*cm[4*2+0] + x[1]*cm[4*2+1] + x[2]*cm[4*2+2] + x[3]*cm[4*2+3])/CM(1),
			0xff,
		};
		u8int z[4] = {
			clamp(y[0], 0, 255),
			clamp(y[1], 0, 255),
			clamp(y[2], 0, 255),
			0xff,
		};
		*out++ = z[0]<<0 | z[1]<<8 | z[2]<<16 | (pixel_t)z[3]<<24;
	}
}