#include <nostub.h>
#include <gray.h>
#include <stdio.h>
#include <estack.h>
#include <vat.h>
#include <alloc.h>

void _grayscale_on(char **buffers)
{
        GrayMode(GRAY_ON);
        buffers[0] = GetPlane(0);
        buffers[1] = GetPlane(1);
}

void _grayscale_off()
{
        GrayMode(GRAY_OFF);
}

SYM_ENTRY *find_it()
{
        return DerefSym(SymFind($(platdata)));
}

void *_get_data_file()
{
        SYM_ENTRY *f;
        long x;

        f = find_it();

        if (f == NULL)
                return NULL;

        return HeapDeref(f->handle);
}

void *_create_save_file(int size)
{
        SYM_ENTRY *file;
        HANDLE data;

        EM_moveSymFromExtMem($(platdata), HS_NULL); 
        SymDel($(platdata));

        data = HeapAlloc(size);

        if (data == H_NULL)
                return NULL;

        file = DerefSym(SymAdd($(platdata)));

        if (file == NULL) {
                HeapFree(data);
                return NULL;
        }

        file->handle = data;

        return HeapDeref(data);
}