/*
 *		INTERPOLATOR 2070
 *
 *	Don't use that software in real life !
 *
 *	imported in FloatImg Mon Nov  9 19:08:57 CET 2020
 *
 */
#include  <stdio.h>
#include  <string.h>
#include  <stdlib.h>
#include  <unistd.h>
#include  <glob.h>

#include  "../floatimg.h"

// XXX #include  "fonctions.h"

int		verbosity;

/* -------------------------------------------------------------- */
int interpolator(char *pattern, char *outdir, int Nsteps)
{
FloatImg	A, B, Out, *pFirst, *pSecond, *pTmp;
glob_t		globbuf;
int		foo, idx, ipng, w, h, step;
int		iarray[3];
char		*cptr, line[200];
float		coef;

fprintf(stderr, "\nfrom %s to %s with %d steps.\n", pattern, outdir, Nsteps);

memset(&globbuf, 0, sizeof(glob_t));
foo = glob(pattern, 0, NULL, &globbuf);
fprintf(stderr, "globbing '%s' -> %d, %ld files found\n",
			pattern, foo, globbuf.gl_pathc);

if (0 == globbuf.gl_pathc) {
	fprintf(stderr, "%s : no file found, aborting\n", __func__);
	return -1;
	}

foo = fimg_fileinfos(globbuf.gl_pathv[0], iarray);
w = iarray[0], h = iarray[1];
fprintf(stderr, "\tfirst image size : %dx%d\n", w, h);

fimg_create(&A,   w, h, 3);	pFirst  = &A;
fimg_create(&B,   w, h, 3);	pSecond = &B;
fimg_create(&Out, w, h, 3);

pTmp = NULL;

ipng = 0;
for (idx=0; idx<globbuf.gl_pathc; idx++) {

	cptr = globbuf.gl_pathv[idx];

	/* read the next file in B */
	fprintf(stderr, "loading %s\n", cptr);
	foo = fimg_load_from_dump(cptr, &B);
	if (foo) {
		fprintf(stderr, "load #%d from dump -> %d\n", idx, foo);
		continue;
		}

	for (step=0; step<Nsteps; step++) {
		coef = (float)step / (float)Nsteps;
		fimg_interpolate(pSecond, pFirst, &Out, coef);

		sprintf(line, "%s/%05d.png", outdir, ipng);
		foo = fimg_save_as_png(&Out, line, 0);
		if (foo) {
			fprintf(stderr, "err saving %s\n", line);
			return -8;
			}
		ipng++;
		}

#if 1
	/* temporary hack : move datas */
	fimg_copy_data(&B, &A);
#else
	/* swap pointers to the two picz */
	pTmp = pSecond;
	pSecond = pFirst;
	pFirst = pTmp;
	/* THIS CODE DON'T WORK !!! */
#endif
	}

fprintf(stderr, "generated %d png files\n", ipng);

return 0;
}
/* -------------------------------------------------------------- */
int main (int argc, char *argv[])
{
int		foo;
int		nbrsteps = 9;

fprintf(stderr, "*** %s : compiled by tTh, %s %s\n", __FILE__,
			__DATE__, __TIME__);
fimg_print_version(2);

if (4 != argc) {
	fprintf(stderr, "args: <in globpattern> <out dir> <nbrsteep>\n");
	exit(1);
	}

nbrsteps = atoi(argv[3]);

foo = interpolator(argv[1], argv[2], nbrsteps);

fprintf(stderr, "interpolator -> %d\n", foo);

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