/*
 *		filterstack.c
 */

#include  <stdio.h>
#include  <stdlib.h>

#include  "../floatimg.h"
#include  "filterstack.h"

#undef  DEBUG_LEVEL
#define DEBUG_LEVEL 1

/* -------------------------------------------------------------- */
static	FilterSlot 	*stack_slots;
static  int		nbre_filters, idx_slot;
/* -------------------------------------------------------------- */
int filterstack_init(int nbre)
{
FilterSlot	*fsptr;

#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %d )\n", __func__, nbre);
#endif

if (NULL != stack_slots) {
	fprintf(stderr, "ERR stack_slots = %p\n",stack_slots);
	return -1;
	} 
fsptr = calloc(nbre, sizeof(FilterSlot));
if (NULL == fsptr) {
	fprintf(stderr, "%s : no memory\n", __func__);
	exit(1);
	}

stack_slots = fsptr;
nbre_filters = nbre;
idx_slot = 0;

fprintf(stderr, "%s: stack at %p\n", __func__, stack_slots); 

return 0;
}
/* -------------------------------------------------------------- */
int filterstack_add(int code, int ival, float fval)
{
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %d %d %f )\n", __func__, code, ival, fval);
#endif

if (NULL==stack_slots) {
	fprintf(stderr, "%s: NULL statck !\n", __func__);
	exit(1);
	}
if (idx_slot == nbre_filters) {
	fprintf(stderr, "%s: stack is full\n", __func__);
	return -1;
	}

stack_slots[idx_slot].numero = code;
stack_slots[idx_slot].ival   = ival;
stack_slots[idx_slot].fval   = fval;

idx_slot++;

return 0;
}
/* -------------------------------------------------------------- */
int filterstack_list(void)
{
int		idx;

fprintf(stderr, "stack at %p, size %d, current %d\n",
			stack_slots, nbre_filters, idx_slot); 
for (idx=0; idx<idx_slot; idx++) {

	fprintf(stderr, "%3d    %3d    %3d    %f\n", idx,
			stack_slots[idx].numero,
			stack_slots[idx].ival,
			stack_slots[idx].fval);

	}

return 0;
}
/* -------------------------------------------------------------- */
int filterstack_run(FloatImg *target, int notused)
{
int		idx, foo;

#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %d)\n", __func__, target, notused);
#endif

for (idx=0; idx<idx_slot; idx++) {

	fprintf(stderr, "%d : effect %2d on %p\n",
			idx, stack_slots[idx].numero, target);

	foo = crapulator(target, stack_slots[idx].numero, 0.0);
	if (foo) {
		fprintf(stderr, "crapulator error %d\n", foo);
		return foo;
		}
	}

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