55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/*
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* incrustator experimental
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*/
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#include <stdio.h>
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#include <string.h>
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#include "../floatimg.h"
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#include "incrustator.h"
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extern int verbosity;
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/* ---------------------------------------------------------------- */
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int incrustator_0(FloatImg *psrc, FloatImg *pdst,
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int xpos, int ypos, int flags)
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{
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int y, srcpos, dstpos, szl;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %p %d %d 0x%04X\n", __func__, psrc, pdst,
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xpos, ypos, flags);
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#endif
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if (verbosity > 1) {
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fimg_describe(psrc, "source");
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fimg_describe(pdst, "destination");
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}
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/* check boudaries */
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if ( (xpos < 0) || (xpos > pdst->width - psrc->width) ||
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(ypos < 0) || (ypos > pdst->height - psrc->height) ) {
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fprintf(stderr, "%s: boudary error\n", __func__);
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return -2;
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}
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/* move all the data by looping over lines */
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srcpos = 0;
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dstpos = (ypos * pdst->width) + xpos;
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szl = psrc->width * sizeof(float);
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for (y=0; y<psrc->height; y++) {
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// fprintf(stderr, " %7d %7d %7d\n", y, srcpos, dstpos);
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memcpy(pdst->R + dstpos, psrc->R + srcpos, szl);
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memcpy(pdst->G + dstpos, psrc->G + srcpos, szl);
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memcpy(pdst->B + dstpos, psrc->B + srcpos, szl);
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srcpos += psrc->width;
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dstpos += pdst->width;
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}
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return 0;
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}
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/* ---------------------------------------------------------------- */
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