Bibliothèque de traitements d'images en virgule flottante. http://la.buvette.org/photos/cumul/
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/*
* MOVEPIXELS
*
* This is experimental, do not use in production !
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <floatimg.h>
int verbosity;
/* ------------------------------------------------------------------- */
int displace(FloatImg *psrc, FloatImg *pshift, FloatImg *pdst, float k)
{
int xd, yd, xs, ys;
float rgb[3], disp[3], maxv;
float minmax[6];
int foo, inside, outside;
float dltr, dltg, dltb; /* delta des minmax */
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %p %g )\n", __func__,
psrc, pshift, pdst, k);
#endif
if (FIMG_TYPE_RGB != psrc->type) {
fprintf(stderr, "%s: bad src type %d\n", __func__, psrc->type);
return -7;
}
if (fimg_images_not_compatible(psrc, pshift)) {
fprintf(stderr, "%s: bad shift image %d\n", __func__, pshift->type);
return -8;
}
if (fimg_images_not_compatible(psrc, pdst)) {
fprintf(stderr, "%s: bad dst image %d\n", __func__, pdst->type);
return -8;
}
foo = fimg_get_minmax_rgb(pshift, minmax);
if (verbosity) {
fimg_print_minmax(minmax, (char *)__func__);
}
dltr = minmax[1] - minmax[0];
dltg = minmax[3] - minmax[2];
dltb = minmax[5] - minmax[4];
if (verbosity) fprintf(stderr, "delta shift %f %f %f\n", dltr, dltg, dltb);
maxv = fimg_get_maxvalue(psrc);
inside = outside = 0;
/* hardcoded parameters. this is very dirty :) */
#define MULT (140.0)
#define OFFS (70.0)
/* loop over all the pixels of the DESTINATION picture */
for (yd=0; yd<pdst->height; yd++) {
for (xd=0; xd<pdst->width; xd++) {
fimg_get_rgb(pshift, xd, yd, disp);
xs = xd + ((disp[0]/dltr*MULT) - OFFS);
ys = yd + ((disp[2]/dltb*MULT) - OFFS);
if ( xs<0 || xs>psrc->width ||
ys<0 || ys>psrc->height ) {
rgb[0] = maxv; /* fucking bug XXX */
rgb[1] = rgb[2] = 0.0;
outside++;
}
else {
fimg_get_rgb(psrc, xs, ys, rgb);
inside++;
}
fimg_put_rgb(pdst, xd, yd, rgb);
}
}
// fprintf(stderr, "%s: inside %d outside %d\n", __func__, inside, outside);
return 0;
}
/* ------------------------------------------------------------------- */
int move_the_pixels(char *infile, char *statfile, char *outfile, int k)
{
int foo;
FloatImg src, shift, dst;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %s %s 0x%04x )\n", __func__,
infile, outfile, k);
#endif
/* 'infile' contains the shifting values */
foo = fimg_create_from_dump(infile, &shift);
if (foo) {
fprintf(stderr, "%s: error loading '%s'\n", __func__, infile);
return foo;
}
fimg_clone(&shift, &dst, 0);
foo = fimg_create_from_dump(statfile, &src);
if (foo) {
fprintf(stderr, "%s: error loading 'cumul.fimg'\n", __func__);
return foo;
}
foo = displace(&src, &shift, &dst, 42.42);
if (foo) {
fprintf(stderr, "%s: err %d in disp map 0\n", __func__, foo);
return foo;
}
foo = fimg_export_picture(&dst, outfile, 0);
if (foo) {
fprintf(stderr, "%s: err %d saving result\n", __func__, foo);
return foo;
}
return 0;
}
/* ------------------------------------------------------------------- */
int main(int argc, char *argv[])
{
int foo;
char *srcfile, *dstfile;
if (3 != argc) {
fprintf(stderr, "usage:\n\t%s src.fimg dst.fimg\n", argv[0]);
exit(1);
}
srcfile = argv[1];
dstfile = argv[2];
verbosity = 0;
foo = move_the_pixels(srcfile, "cumul.fimg", dstfile, 3);
// fprintf(stderr, "move pixels %s -> %s = %d\n", srcfile, dstfile, foo);
return 0;
}
/* ------------------------------------------------------------------- */