Bibliothèque de traitements d'images en virgule flottante. http://la.buvette.org/photos/cumul/
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/*
* 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;
szl = psrc->width * sizeof(float);
for (y=0; y<psrc->height; y++) {
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dstpos = ((y + ypos) * pdst->width) + xpos;
// 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);
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srcpos += psrc->width;
}
return 0;
}
/* ---------------------------------------------------------------- */