forked from tTh/FloatImg
93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/*
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* displacement.c
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "../floatimg.h"
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extern int verbosity;
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/* --------------------------------------------------------------------- */
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/* nouveau 24 octobre 2020, pendant le masque-flamme coronavidique */
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int fimg_displacement_0(FloatImg *psrc, FloatImg *pdst, int flags)
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{
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int x, y, foo;
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float minmax[6];
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float rgb[3];
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float dltr, dltg, dltb; /* delta des minmax */
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float dispx, dispy;
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int dstx, dsty;
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int in, out;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %p 0x%04x )\n", __func__, psrc, pdst, flags);
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#endif
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if (FIMG_TYPE_RGB != psrc->type) {
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fprintf(stderr, "%s: bad src type %d\n", __func__, psrc->type);
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return -7;
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}
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if (fimg_images_not_compatible(psrc, pdst)) {
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fprintf(stderr, "%s: bad dst type %d\n", __func__, pdst->type);
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return -8;
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}
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foo = fimg_get_minmax_rgb(psrc, minmax);
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if (verbosity) {
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fimg_print_minmax(minmax, (char *)__func__);
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}
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dltr = minmax[1] - minmax[0];
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dltg = minmax[3] - minmax[2];
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dltb = minmax[5] - minmax[4];
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in = out = 0;
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/*
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* BE WARNED !
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* This code doesn't work as expected, so I have to
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* rewrite it, maybe when the pandemic is closed...
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*/
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for (y=0; y<psrc->height; y++) {
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for (x=0; x<psrc->width; x++) {
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fimg_get_rgb(psrc, x, y, rgb);
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dispx = (float)x + (rgb[1]/dltg * 20.0);
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dispy = (float)y + (rgb[2]/dltb * 10.0);
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dstx = (int)roundf(dispx - 10.0);
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dsty = (int)roundf(dispy - 10.0);
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if ( (dstx < 0) || (dsty < 0) ||
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(dstx >= psrc->width) ||
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(dsty >= psrc->height) )
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{
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/* OUT OF DESTINATION PICTURE */
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out++;
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}
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else {
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if (flags & 1) {
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/* going monochrome */
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rgb[1] = rgb[2] = rgb[0];
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}
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fimg_put_rgb(pdst, dstx, dsty, rgb);
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in++;
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}
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}
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}
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if (verbosity) fprintf(stderr, "%s -> in %d out %d\n", __func__, in, out);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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