FloatImg/lib/t.c

/*
 *		programme de test pour
 *		les fonctions de base.
 */

#include  <stdio.h>
#include  <stdlib.h>
#include  <unistd.h>
#include  <string.h>
#include  <math.h>

#include  "../floatimg.h"

int		verbosity;

/* ---------------------------------------------------------------- */
int petit_dessin(FloatImg *img)
{
int		x, y;
float		r, g, b;

for (y=0; y<img->height; y++) {

	r = (float)y / (float)img->height;

	for (x=0; x<img->width; x++) {

		g = (float)x / (float)img->width;
		b = 0.0;;

		fimg_plot_rgb(img, x, y, r, g, b);

		}

	}

return -1;
}
/* ---------------------------------------------------------------- */

int essai_2gray(FloatImg *picz, char *outname)
{
int		foo;
FloatImg	gray;

fprintf(stderr, ">>> %s ( %p '%s' )\n", __func__, picz, outname);

foo = fimg_create(&gray, picz->width, picz->height, FIMG_TYPE_GRAY);
if (foo) {
	fprintf(stderr, "%s : err %d on fimg create\n", __func__, foo);
	exit(1);
	}
foo = fimg_mk_gray_from(picz, &gray, 0);
if (foo) {
	fprintf(stderr, "%s : err %d on fimg mk_gray_from\n", __func__, foo);
	exit(1);
	}

foo = fimg_save_as_pnm(&gray, outname, 0);
if (foo) {
	fprintf(stderr, "%s : err %d on save_as_pnm\n", __func__, foo);
	exit(1);
	}

fimg_destroy(&gray);

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

int fimg_square_root(FloatImg *s, FloatImg *d, double maxval);
int fimg_power_2(FloatImg *s, FloatImg *d, double maxval);

int essai_contraste(char *fname)
{
int		foo;
FloatImg 	dessin;
double		maxi;

foo = fimg_create_from_dump(fname, &dessin);

maxi = (double)fimg_get_maxvalue(&dessin);
fprintf(stderr, "avant    valeur maxi = %f\n", maxi);

fimg_power_2(&dessin, NULL, maxi);

maxi = (double)fimg_get_maxvalue(&dessin);
fprintf(stderr, "apres    valeur maxi = %f\n", maxi);

fimg_dump_to_file(&dessin, "dst.fimg", 0);

fimg_destroy(&dessin);

return -1;
}
/* ---------------------------------------------------------------- */
#define W 320
#define H 240
int main(int argc, char *argv[])
{
int		foo, idx, opt;
// char		outname[100];
int		gray = 0;

while ((opt = getopt(argc, argv, "gn:v")) != -1) {
	switch(opt) {
		case 'g':	gray++;			break;
		case 'n':	foo=atoi(optarg);	break;
		case 'v':	verbosity++;		break;
		}
	}

if (verbosity) fimg_print_version(0);

foo = essai_contraste("src.fimg");


return 0;
}