#include "aai86.h"
#include "aascreen.h"

Vscreen *
aa_alloc_mem_cel(int x, int y, int w, int h)
{
Vscreen *vs;

if ((vs = aa_malloc(sizeof(*vs))) != NULL)
	{
	i86_bzero(vs, sizeof(*vs) );
	vs->x = x;
	vs->y = y;
	vs->bpr = vs->w = w;
	vs->h = h;
	vs->psize = (long)w*h;
	if ((vs->allocedp = aa_malloc((unsigned)vs->psize+16)) == NULL)
		{
		aa_free(vs);
		return(NULL);
		}
	if ((vs->cmap = aa_malloc(AA_COLORS*3)) == NULL)
		{
		aa_free_mem_screen(vs);
		return(NULL);
		}
	/* force even paragraph allignment */
	vs->p = i86_make_ptr(0, i86_ptr_seg(vs->allocedp)+1);
	}
return(vs);
}

Vscreen *
aa_alloc_mem_screen()
{
return(aa_alloc_mem_cel(0, 0, AA_XMAX, AA_YMAX));
}

void aa_free_mem_screen(Vscreen *vs)
{
if (vs)
	{
	if (vs->cmap)
		aa_free(vs->cmap);
	if (vs->allocedp)
		aa_free(vs->allocedp);
	aa_free(vs);
	}
}