/*
 * Unit tests for dc functions
 *
 * Copyright (c) 2005 Huw Davies
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <assert.h>
#include <stdio.h>
#include <math.h>

#include "wine/test.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winerror.h"


void test_savedc(void)
{
    HDC hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
    int ret;

    ok(hdc != NULL, "CreateDC rets %p\n", hdc);

    ret = SaveDC(hdc);
    ok(ret == 1, "ret = %d\n", ret);
    ret = SaveDC(hdc);
    ok(ret == 2, "ret = %d\n", ret);
    ret = SaveDC(hdc);
    ok(ret == 3, "ret = %d\n", ret);
    ret = RestoreDC(hdc, -1);
    ok(ret, "ret = %d\n", ret);
    ret = SaveDC(hdc);
    ok(ret == 3, "ret = %d\n", ret);
    ret = RestoreDC(hdc, 1);
    ok(ret, "ret = %d\n", ret);
    ret = SaveDC(hdc);
    ok(ret == 1, "ret = %d\n", ret);
    ret = SaveDC(hdc);
    ok(ret == 2, "ret = %d\n", ret);
    ret = SaveDC(hdc);
    ok(ret == 3, "ret = %d\n", ret);
    ret = RestoreDC(hdc, -2);
    ok(ret, "ret = %d\n", ret);
    ret = SaveDC(hdc);
    ok(ret == 2, "ret = %d\n", ret);
    ret = RestoreDC(hdc, -2);
    ok(ret, "ret = %d\n", ret);
    ret = SaveDC(hdc);
    ok(ret == 1, "ret = %d\n", ret);
    ret = SaveDC(hdc);
    ok(ret == 2, "ret = %d\n", ret); 
    ret = RestoreDC(hdc, -4);
    ok(!ret, "ret = %d\n", ret);
    ret = RestoreDC(hdc, 3);
    ok(!ret, "ret = %d\n", ret);

    /* Under win98 the following two succeed and both clear the save stack
    ret = RestoreDC(hdc, -3);
    ok(!ret, "ret = %d\n", ret);
    ret = RestoreDC(hdc, 0);
    ok(!ret, "ret = %d\n", ret);
    */

    ret = RestoreDC(hdc, 1);
    ok(ret, "ret = %d\n", ret);

    DeleteDC(hdc);
}

START_TEST(dc)
{
    test_savedc();
}