dlls/gdi/tests/dc.c

   1 /*
   2  * Unit tests for dc functions
   3  *
   4  * Copyright (c) 2005 Huw Davies
   5  * Copyright (c) 2005 Dmitry Timoshkov
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <assert.h>
  23 #include <stdio.h>
  24
  25 #include "wine/test.h"
  26 #include "winbase.h"
  27 #include "wingdi.h"
  28 #include "winuser.h"
  29 #include "winerror.h"
  30
  31 static void dump_region(HRGN hrgn)
  32 {
  33     DWORD i, size;
  34     RGNDATA *data = NULL;
  35     RECT *rect;
  36
  37     if (!hrgn)
  38     {
  39         printf( "(null) region\n" );
  40         return;
  41     }
  42     if (!(size = GetRegionData( hrgn, 0, NULL ))) return;
  43     if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return;
  44     GetRegionData( hrgn, size, data );
  45     printf( "%d rects:", data->rdh.nCount );
  46     for (i = 0, rect = (RECT *)data->Buffer; i < data->rdh.nCount; i++, rect++)
  47         printf( " (%d,%d)-(%d,%d)", rect->left, rect->top, rect->right, rect->bottom );
  48     printf( "\n" );
  49     HeapFree( GetProcessHeap(), 0, data );
  50 }
  51
  52 static void test_savedc_2(void)
  53 {
  54     HWND hwnd;
  55     HDC hdc;
  56     HRGN hrgn;
  57     RECT rc, rc_clip;
  58     int ret;
  59
  60     hwnd = CreateWindowExA(0, "static", "", WS_POPUP, 0,0,100,100,
  61                            0, 0, 0, NULL);
  62     assert(hwnd != 0);
  63     ShowWindow(hwnd, SW_SHOW);
  64     UpdateWindow(hwnd);
  65
  66     hrgn = CreateRectRgn(0, 0, 0, 0);
  67     assert(hrgn != 0);
  68
  69     hdc = GetDC(hwnd);
  70     ok(hdc != NULL, "CreateDC rets %p\n", hdc);
  71
  72     ret = GetClipBox(hdc, &rc_clip);
  73     ok(ret == SIMPLEREGION, "GetClipBox returned %d instead of SIMPLEREGION\n", ret);
  74     ret = GetClipRgn(hdc, hrgn);
  75     ok(ret == 0, "GetClipRgn returned %d instead of 0\n", ret);
  76     ret = GetRgnBox(hrgn, &rc);
  77     ok(ret == NULLREGION, "GetRgnBox returned %d (%d,%d-%d,%d) instead of NULLREGION\n",
  78        ret, rc.left, rc.top, rc.right, rc.bottom);
  79     /*dump_region(hrgn);*/
  80     SetRect(&rc, 0, 0, 100, 100);
  81     ok(EqualRect(&rc, &rc_clip),
  82        "rects are not equal: (%d,%d-%d,%d) - (%d,%d-%d,%d)\n",
  83        rc.left, rc.top, rc.right, rc.bottom,
  84        rc_clip.left, rc_clip.top, rc_clip.right, rc_clip.bottom);
  85
  86     ret = SaveDC(hdc);
  87 todo_wine
  88 {
  89     ok(ret == 1, "ret = %d\n", ret);
  90 }
  91
  92     ret = IntersectClipRect(hdc, 0, 0, 50, 50);
  93 #if 0  /* XP returns COMPLEXREGION although dump_region reports only 1 rect */
  94     ok(ret == SIMPLEREGION, "IntersectClipRect returned %d instead of SIMPLEREGION\n", ret);
  95 #endif
  96     if (ret != SIMPLEREGION)
  97     {
  98         trace("Windows BUG: IntersectClipRect returned %d instead of SIMPLEREGION\n", ret);
  99         /* let's make sure that it's a simple region */
 100         ret = GetClipRgn(hdc, hrgn);
 101         ok(ret == 1, "GetClipRgn returned %d instead of 1\n", ret);
 102         dump_region(hrgn);
 103     }
 104
 105     ret = GetClipBox(hdc, &rc_clip);
 106     ok(ret == SIMPLEREGION, "GetClipBox returned %d instead of SIMPLEREGION\n", ret);
 107     SetRect(&rc, 0, 0, 50, 50);
 108     ok(EqualRect(&rc, &rc_clip), "rects are not equal\n");
 109
 110     ret = RestoreDC(hdc, 1);
 111     ok(ret, "ret = %d\n", ret);
 112
 113     ret = GetClipBox(hdc, &rc_clip);
 114     ok(ret == SIMPLEREGION, "GetClipBox returned %d instead of SIMPLEREGION\n", ret);
 115     SetRect(&rc, 0, 0, 100, 100);
 116     ok(EqualRect(&rc, &rc_clip), "rects are not equal\n");
 117
 118     DeleteObject(hrgn);
 119     ReleaseDC(hwnd, hdc);
 120     DestroyWindow(hwnd);
 121 }
 122
 123 static void test_savedc(void)
 124 {
 125     HDC hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
 126     int ret;
 127
 128     ok(hdc != NULL, "CreateDC rets %p\n", hdc);
 129
 130     ret = SaveDC(hdc);
 131     ok(ret == 1, "ret = %d\n", ret);
 132     ret = SaveDC(hdc);
 133     ok(ret == 2, "ret = %d\n", ret);
 134     ret = SaveDC(hdc);
 135     ok(ret == 3, "ret = %d\n", ret);
 136     ret = RestoreDC(hdc, -1);
 137     ok(ret, "ret = %d\n", ret);
 138     ret = SaveDC(hdc);
 139     ok(ret == 3, "ret = %d\n", ret);
 140     ret = RestoreDC(hdc, 1);
 141     ok(ret, "ret = %d\n", ret);
 142     ret = SaveDC(hdc);
 143     ok(ret == 1, "ret = %d\n", ret);
 144     ret = SaveDC(hdc);
 145     ok(ret == 2, "ret = %d\n", ret);
 146     ret = SaveDC(hdc);
 147     ok(ret == 3, "ret = %d\n", ret);
 148     ret = RestoreDC(hdc, -2);
 149     ok(ret, "ret = %d\n", ret);
 150     ret = SaveDC(hdc);
 151     ok(ret == 2, "ret = %d\n", ret);
 152     ret = RestoreDC(hdc, -2);
 153     ok(ret, "ret = %d\n", ret);
 154     ret = SaveDC(hdc);
 155     ok(ret == 1, "ret = %d\n", ret);
 156     ret = SaveDC(hdc);
 157     ok(ret == 2, "ret = %d\n", ret);
 158     ret = RestoreDC(hdc, -4);
 159     ok(!ret, "ret = %d\n", ret);
 160     ret = RestoreDC(hdc, 3);
 161     ok(!ret, "ret = %d\n", ret);
 162
 163     /* Under win98 the following two succeed and both clear the save stack
 164     ret = RestoreDC(hdc, -3);
 165     ok(!ret, "ret = %d\n", ret);
 166     ret = RestoreDC(hdc, 0);
 167     ok(!ret, "ret = %d\n", ret);
 168     */
 169
 170     ret = RestoreDC(hdc, 1);
 171     ok(ret, "ret = %d\n", ret);
 172
 173     DeleteDC(hdc);
 174 }
 175
 176 START_TEST(dc)
 177 {
 178     test_savedc();
 179     test_savedc_2();
 180 }