FloatImg4PythonBinding/experiment/incrustator.c

/*
 *		incrustator experimental
 */

#include  <stdio.h>
#include  <string.h>

#include  "../floatimg.h"

#include  "incrustator.h"

extern int 		verbosity;

/* ---------------------------------------------------------------- */
int incrustator_0(FloatImg *psrc, FloatImg *pdst,
				int xpos, int ypos, int flags)
{
int	y, srcpos, dstpos, szl;

#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %d %d 0x%04X\n", __func__, psrc, pdst,
							xpos, ypos, flags);
#endif

if (verbosity > 1) {
	fimg_describe(psrc, "source");
	fimg_describe(pdst, "destination");
	}

/* check boudaries */
if (	(xpos < 0)  || (xpos > pdst->width  - psrc->width)  ||
	(ypos < 0)  || (ypos > pdst->height - psrc->height) ) {
	fprintf(stderr, "%s: boudary error\n", __func__);
	return -2;
	}

/* move all the data by looping over lines */
srcpos = 0;
dstpos = (ypos * pdst->width) + xpos;
szl = psrc->width * sizeof(float);
for (y=0; y<psrc->height; y++) {
	// fprintf(stderr, " %7d   %7d   %7d\n", y, srcpos, dstpos);

	memcpy(pdst->R + dstpos, psrc->R + srcpos, szl);
	memcpy(pdst->G + dstpos, psrc->G + srcpos, szl);
	memcpy(pdst->B + dstpos, psrc->B + srcpos, szl);

	srcpos += psrc->width;
	dstpos += pdst->width;
	}

return 0;
}
/* ---------------------------------------------------------------- */