/*
 *		SPECIAL EFFECTS
 *
 *	Du code bien cracra / tTh / Tetalab
 */
#include  <stdio.h>
#include  <string.h>
#include  <stdlib.h>
#include  <malloc.h>

#include  <floatimg.h>

#include  "fonctions.h"

/* -------------------------------------------------------------- */
/*	global vars from main
 */
extern	int	verbosity;

/* -------------------------------------------------------------- */

int brotche_rand48(FloatImg *fimg, float ratio, float mval) 
{
int		nbpix, todo, foo;
int		x, y;
float		fval;

nbpix = fimg->width * fimg->height;
todo = (int)((float)nbpix  * ratio);

if (verbosity > 1)
	fprintf(stderr, "ratio %f nbpix %d todo %d\n", ratio, nbpix, todo);

for (foo=0; foo<todo; foo++)
	{
	fval = (float)drand48() * mval;
	x = rand() % fimg->width;
	y = rand() % fimg->height;
	fimg_plot_rgb(fimg, x, y, fval, fval, fval);
	}

return 0;
}
/* -------------------------------------------------------------- */
int brotche_rand48_b(FloatImg *fimg, float ratio, float mval) 
{
int		nbpix, todo, foo;
int		x, y;
float		fval;

nbpix = fimg->width * fimg->height;
todo = (int)((float)nbpix  * ratio);

if (verbosity > 1) {
	fprintf(stderr, "ratio %f nbpix %d todo %d\n",
					ratio, nbpix, todo);
	}

for (foo=0; foo<todo; foo++)
	{
	fval = (float)drand48() * mval;
	x = 1 + (rand() % (fimg->width-2));
	y = rand() % fimg->height;
	fimg_plot_rgb(fimg, x-1, y, fval, 0.0, 0.0);
	fimg_plot_rgb(fimg, x  , y, 0.0, 0.0, fval);
	fimg_plot_rgb(fimg, x+1, y, 0.0, fval, 0.0);
	}

return 0;
}
/* -------------------------------------------------------------- */
/*
 *	OMG ! a Color Graphic Adaptor emulator :)
 */
int kill_colors_a(FloatImg *fimg, float fval)
{
int		nbpix, foo;

if (FIMG_TYPE_RGB != fimg->type) {
	fprintf(stderr, "%s: bad src type %d on %p\n", __func__,
					fimg->type, fimg);
	return -8;
	}

nbpix = fimg->width * fimg->height;

for (foo=0; foo<nbpix; foo++) {

	if (fimg->R[foo] > fimg->G[foo])
		fimg->B[foo] = fimg->R[foo];
	else
		fimg->B[foo] = fimg->G[foo];
	}

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