modules/rostests/winetests/gdi32/clipping.c

   1 /*
   2  * Unit test suite for clipping
   3  *
   4  * Copyright 2005 Huw Davies
   5  * Copyright 2008,2011,2013 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 "wine/test.h"
  23 #include "winbase.h"
  24 #include "wingdi.h"
  25 #include "winuser.h"
  26
  27 static void test_GetRandomRgn(void)
  28 {
  29     HWND hwnd = CreateWindowExA(0,"BUTTON","test",WS_VISIBLE|WS_POPUP,0,0,100,100,GetDesktopWindow(),0,0,0);
  30     HDC hdc;
  31     HRGN hrgn = CreateRectRgn(0, 0, 0, 0);
  32     int ret;
  33     RECT rc, rc2;
  34     RECT ret_rc, window_rc;
  35
  36     ok( hwnd != 0, "CreateWindow failed\n" );
  37
  38     SetRect(&window_rc, 400, 300, 500, 400);
  39     SetWindowPos(hwnd, HWND_TOPMOST, window_rc.left, window_rc.top,
  40                  window_rc.right - window_rc.left, window_rc.bottom - window_rc.top, 0 );
  41     hdc = GetDC(hwnd);
  42
  43     ret = GetRandomRgn(hdc, hrgn, 1);
  44     ok(ret == 0, "GetRandomRgn rets %d\n", ret);
  45     ret = GetRandomRgn(hdc, hrgn, 2);
  46     ok(ret == 0, "GetRandomRgn rets %d\n", ret);
  47     ret = GetRandomRgn(hdc, hrgn, 3);
  48     ok(ret == 0, "GetRandomRgn rets %d\n", ret);
  49
  50     /* Set a clip region */
  51     SetRect(&rc, 20, 20, 80, 80);
  52     IntersectClipRect(hdc, rc.left, rc.top, rc.right, rc.bottom);
  53
  54     ret = GetRandomRgn(hdc, hrgn, 1);
  55     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  56     GetRgnBox(hrgn, &ret_rc);
  57     ok(EqualRect(&rc, &ret_rc), "GetRandomRgn %s\n", wine_dbgstr_rect(&ret_rc));
  58
  59     ret = GetRandomRgn(hdc, hrgn, 2);
  60     ok(ret == 0, "GetRandomRgn rets %d\n", ret);
  61
  62     ret = GetRandomRgn(hdc, hrgn, 3);
  63     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  64     GetRgnBox(hrgn, &ret_rc);
  65     ok(EqualRect(&rc, &ret_rc), "GetRandomRgn %s\n", wine_dbgstr_rect(&ret_rc));
  66
  67     /* Move the clip to the meta and clear the clip */
  68     SetMetaRgn(hdc);
  69
  70     ret = GetRandomRgn(hdc, hrgn, 1);
  71     ok(ret == 0, "GetRandomRgn rets %d\n", ret);
  72     ret = GetRandomRgn(hdc, hrgn, 2);
  73     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  74     GetRgnBox(hrgn, &ret_rc);
  75     ok(EqualRect(&rc, &ret_rc), "GetRandomRgn %s\n", wine_dbgstr_rect(&ret_rc));
  76
  77     ret = GetRandomRgn(hdc, hrgn, 3);
  78     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  79     GetRgnBox(hrgn, &ret_rc);
  80     ok(EqualRect(&rc, &ret_rc), "GetRandomRgn %s\n", wine_dbgstr_rect(&ret_rc));
  81
  82     /* Set a new clip (still got the meta) */
  83     SetRect(&rc2, 10, 30, 70, 90);
  84     IntersectClipRect(hdc, rc2.left, rc2.top, rc2.right, rc2.bottom);
  85
  86     ret = GetRandomRgn(hdc, hrgn, 1);
  87     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  88     GetRgnBox(hrgn, &ret_rc);
  89     ok(EqualRect(&rc2, &ret_rc), "GetRandomRgn %s\n", wine_dbgstr_rect(&ret_rc));
  90
  91     ret = GetRandomRgn(hdc, hrgn, 2);
  92     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  93     GetRgnBox(hrgn, &ret_rc);
  94     ok(EqualRect(&rc, &ret_rc), "GetRandomRgn %s\n", wine_dbgstr_rect(&ret_rc));
  95
  96     IntersectRect(&rc2, &rc, &rc2);
  97
  98     ret = GetRandomRgn(hdc, hrgn, 3);
  99     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
 100     GetRgnBox(hrgn, &ret_rc);
 101     ok(EqualRect(&rc2, &ret_rc), "GetRandomRgn %s\n", wine_dbgstr_rect(&ret_rc));
 102
 103
 104     ret = GetRandomRgn(hdc, hrgn, SYSRGN);
 105     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
 106     GetRgnBox(hrgn, &ret_rc);
 107     if(GetVersion() & 0x80000000)
 108         OffsetRect(&window_rc, -window_rc.left, -window_rc.top);
 109     /* the window may be partially obscured so the region may be smaller */
 110     IntersectRect( &window_rc, &ret_rc, &ret_rc );
 111     ok(EqualRect(&window_rc, &ret_rc), "GetRandomRgn %s\n", wine_dbgstr_rect(&ret_rc));
 112
 113     DeleteObject(hrgn);
 114     ReleaseDC(hwnd, hdc);
 115     DestroyWindow(hwnd);
 116 }
 117
 118 static void verify_region(HRGN hrgn, const RECT *rc)
 119 {
 120     union
 121     {
 122         RGNDATA data;
 123         char buf[sizeof(RGNDATAHEADER) + sizeof(RECT)];
 124     } rgn;
 125     const RECT *rect;
 126     DWORD ret;
 127
 128     ret = GetRegionData(hrgn, 0, NULL);
 129     if (IsRectEmpty(rc))
 130         ok(ret == sizeof(rgn.data.rdh), "expected sizeof(rdh), got %u\n", ret);
 131     else
 132         ok(ret == sizeof(rgn.data.rdh) + sizeof(RECT), "expected sizeof(rgn), got %u\n", ret);
 133
 134     if (!ret) return;
 135
 136     ret = GetRegionData(hrgn, sizeof(rgn), &rgn.data);
 137     if (IsRectEmpty(rc))
 138         ok(ret == sizeof(rgn.data.rdh), "expected sizeof(rdh), got %u\n", ret);
 139     else
 140         ok(ret == sizeof(rgn.data.rdh) + sizeof(RECT), "expected sizeof(rgn), got %u\n", ret);
 141
 142     trace("size %u, type %u, count %u, rgn size %u, bound %s\n",
 143           rgn.data.rdh.dwSize, rgn.data.rdh.iType, rgn.data.rdh.nCount, rgn.data.rdh.nRgnSize,
 144           wine_dbgstr_rect(&rgn.data.rdh.rcBound));
 145     if (rgn.data.rdh.nCount != 0)
 146     {
 147         rect = (const RECT *)rgn.data.Buffer;
 148         trace("rect %s\n", wine_dbgstr_rect(rect));
 149         ok(EqualRect(rect, rc), "rects don't match\n");
 150     }
 151
 152     ok(rgn.data.rdh.dwSize == sizeof(rgn.data.rdh), "expected sizeof(rdh), got %u\n", rgn.data.rdh.dwSize);
 153     ok(rgn.data.rdh.iType == RDH_RECTANGLES, "expected RDH_RECTANGLES, got %u\n", rgn.data.rdh.iType);
 154     if (IsRectEmpty(rc))
 155     {
 156         ok(rgn.data.rdh.nCount == 0, "expected 0, got %u\n", rgn.data.rdh.nCount);
 157         ok(rgn.data.rdh.nRgnSize == 0 ||
 158            broken(rgn.data.rdh.nRgnSize == 168), /* NT4 */
 159            "expected 0, got %u\n", rgn.data.rdh.nRgnSize);
 160     }
 161     else
 162     {
 163         ok(rgn.data.rdh.nCount == 1, "expected 1, got %u\n", rgn.data.rdh.nCount);
 164         ok(rgn.data.rdh.nRgnSize == sizeof(RECT) ||
 165            broken(rgn.data.rdh.nRgnSize == 168), /* NT4 */
 166            "expected sizeof(RECT), got %u\n", rgn.data.rdh.nRgnSize);
 167     }
 168     ok(EqualRect(&rgn.data.rdh.rcBound, rc), "rects don't match\n");
 169 }
 170
 171 static void test_ExtCreateRegion(void)
 172 {
 173     static const RECT empty_rect;
 174     static const RECT rc = { 111, 222, 333, 444 };
 175     static const RECT arc[2] = { {0, 0, 10, 10}, {10, 10, 20, 20}};
 176     static const RECT rc_xformed = { 76, 151, 187, 262 };
 177     union
 178     {
 179         RGNDATA data;
 180         char buf[sizeof(RGNDATAHEADER) + 2 * sizeof(RECT)];
 181     } rgn;
 182     HRGN hrgn;
 183     XFORM xform;
 184
 185     if (0) /* crashes under Win9x */
 186     {
 187         SetLastError(0xdeadbeef);
 188         hrgn = ExtCreateRegion(NULL, 0, NULL);
 189         ok(!hrgn, "ExtCreateRegion should fail\n");
 190         ok(GetLastError() == ERROR_INVALID_PARAMETER, "ERROR_INVALID_PARAMETER, got %u\n", GetLastError());
 191     }
 192
 193     rgn.data.rdh.dwSize = 0;
 194     rgn.data.rdh.iType = 0;
 195     rgn.data.rdh.nCount = 0;
 196     rgn.data.rdh.nRgnSize = 0;
 197     SetRectEmpty(&rgn.data.rdh.rcBound);
 198     memcpy(rgn.data.Buffer, &rc, sizeof(rc));
 199
 200     SetLastError(0xdeadbeef);
 201     hrgn = ExtCreateRegion(NULL, sizeof(rgn), &rgn.data);
 202     ok(!hrgn, "ExtCreateRegion should fail\n");
 203     ok(GetLastError() == 0xdeadbeef, "0xdeadbeef, got %u\n", GetLastError());
 204
 205     rgn.data.rdh.dwSize = sizeof(rgn.data.rdh) - 1;
 206
 207     SetLastError(0xdeadbeef);
 208     hrgn = ExtCreateRegion(NULL, sizeof(rgn), &rgn.data);
 209     ok(!hrgn, "ExtCreateRegion should fail\n");
 210     ok(GetLastError() == 0xdeadbeef, "0xdeadbeef, got %u\n", GetLastError());
 211
 212     /* although XP doesn't care about the type Win9x does */
 213     rgn.data.rdh.iType = RDH_RECTANGLES;
 214     rgn.data.rdh.dwSize = sizeof(rgn.data.rdh);
 215
 216     /* sizeof(RGNDATAHEADER) is large enough */
 217     SetLastError(0xdeadbeef);
 218     hrgn = ExtCreateRegion(NULL, sizeof(RGNDATAHEADER), &rgn.data);
 219     ok(hrgn != 0, "ExtCreateRegion error %u\n", GetLastError());
 220     verify_region(hrgn, &empty_rect);
 221     DeleteObject(hrgn);
 222
 223     /* Cannot be smaller than sizeof(RGNDATAHEADER) */
 224     SetLastError(0xdeadbeef);
 225     hrgn = ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) - 1, &rgn.data);
 226     todo_wine
 227     ok(!hrgn, "ExtCreateRegion should fail\n");
 228     ok(GetLastError() == 0xdeadbeef, "0xdeadbeef, got %u\n", GetLastError());
 229
 230     SetLastError(0xdeadbeef);
 231     hrgn = ExtCreateRegion(NULL, sizeof(rgn), &rgn.data);
 232     ok(hrgn != 0, "ExtCreateRegion error %u\n", GetLastError());
 233     verify_region(hrgn, &empty_rect);
 234     DeleteObject(hrgn);
 235
 236     rgn.data.rdh.nCount = 1;
 237     SetRectEmpty(&rgn.data.rdh.rcBound);
 238     memcpy(rgn.data.Buffer, &rc, sizeof(rc));
 239
 240     /* With a single rect this seems to work... */
 241     SetLastError(0xdeadbeef);
 242     hrgn = ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) + sizeof(RECT) - 1, &rgn.data);
 243     ok(hrgn != 0, "ExtCreateRegion error %u\n", GetLastError());
 244     verify_region(hrgn, &rc);
 245     DeleteObject(hrgn);
 246
 247     SetLastError(0xdeadbeef);
 248     hrgn = ExtCreateRegion(NULL, sizeof(rgn), &rgn.data);
 249     ok(hrgn != 0, "ExtCreateRegion error %u\n", GetLastError());
 250     verify_region(hrgn, &rc);
 251     DeleteObject(hrgn);
 252
 253     rgn.data.rdh.dwSize = sizeof(rgn.data.rdh) + 1;
 254
 255     SetLastError(0xdeadbeef);
 256     hrgn = ExtCreateRegion(NULL, 1, &rgn.data);
 257     ok(hrgn != 0 ||
 258        broken(GetLastError() == 0xdeadbeef), /* NT4 */
 259        "ExtCreateRegion error %u\n", GetLastError());
 260     if(hrgn)
 261     {
 262         verify_region(hrgn, &rc);
 263         DeleteObject(hrgn);
 264     }
 265
 266     xform.eM11 = 0.5; /* 50% width */
 267     xform.eM12 = 0.0;
 268     xform.eM21 = 0.0;
 269     xform.eM22 = 0.5; /* 50% height */
 270     xform.eDx = 20.0;
 271     xform.eDy = 40.0;
 272
 273     rgn.data.rdh.dwSize = sizeof(rgn.data.rdh);
 274
 275     SetLastError(0xdeadbeef);
 276     hrgn = ExtCreateRegion(&xform, sizeof(rgn), &rgn.data);
 277     ok(hrgn != 0, "ExtCreateRegion error %u/%x\n", GetLastError(), GetLastError());
 278     verify_region(hrgn, &rc_xformed);
 279     DeleteObject(hrgn);
 280
 281     rgn.data.rdh.nCount = 2;
 282     SetRectEmpty(&rgn.data.rdh.rcBound);
 283     memcpy(rgn.data.Buffer, arc, sizeof(arc));
 284
 285     /* Buffer cannot be smaller than sizeof(RGNDATAHEADER) + 2 * sizeof(RECT) */
 286     SetLastError(0xdeadbeef);
 287     hrgn = ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) + 2 * sizeof(RECT) - 1, &rgn.data);
 288     todo_wine
 289     ok(!hrgn, "ExtCreateRegion should fail\n");
 290     ok(GetLastError() == 0xdeadbeef, "0xdeadbeef, got %u\n", GetLastError());
 291
 292 }
 293
 294 static void test_GetClipRgn(void)
 295 {
 296     HDC hdc;
 297     HRGN hrgn, hrgn2, hrgn3, hrgn4;
 298     int ret;
 299
 300     /* Test calling GetClipRgn with NULL device context and region handles. */
 301     ret = GetClipRgn(NULL, NULL);
 302     ok(ret == -1, "Expected GetClipRgn to return -1, got %d\n", ret);
 303
 304     hdc = GetDC(NULL);
 305     ok(hdc != NULL, "Expected GetDC to return a valid device context handle\n");
 306
 307     /* Test calling GetClipRgn with a valid device context and NULL region. */
 308     ret = GetClipRgn(hdc, NULL);
 309     ok(ret == 0 ||
 310        ret == -1 /* Win9x */,
 311        "Expected GetClipRgn to return 0, got %d\n", ret);
 312
 313     /* Initialize the test regions. */
 314     hrgn = CreateRectRgn(100, 100, 100, 100);
 315     ok(hrgn != NULL,
 316        "Expected CreateRectRgn to return a handle to a new rectangular region\n");
 317
 318     hrgn2 = CreateRectRgn(1, 2, 3, 4);
 319     ok(hrgn2 != NULL,
 320        "Expected CreateRectRgn to return a handle to a new rectangular region\n");
 321
 322     hrgn3 = CreateRectRgn(1, 2, 3, 4);
 323     ok(hrgn3 != NULL,
 324        "Expected CreateRectRgn to return a handle to a new rectangular region\n");
 325
 326     hrgn4 = CreateRectRgn(1, 2, 3, 4);
 327     ok(hrgn4 != NULL,
 328        "Expected CreateRectRgn to return a handle to a new rectangular region\n");
 329
 330     /* Try getting a clipping region from the device context
 331      * when the device context's clipping region isn't set. */
 332     ret = GetClipRgn(hdc, hrgn2);
 333     ok(ret == 0, "Expected GetClipRgn to return 0, got %d\n", ret);
 334
 335     /* The region passed to GetClipRgn should be unchanged. */
 336     ret = EqualRgn(hrgn2, hrgn3);
 337     ok(ret == 1,
 338        "Expected EqualRgn to compare the two regions as equal, got %d\n", ret);
 339
 340     /* Try setting and getting back a clipping region. */
 341     ret = SelectClipRgn(hdc, hrgn);
 342     ok(ret == NULLREGION,
 343        "Expected SelectClipRgn to return NULLREGION, got %d\n", ret);
 344
 345     /* Passing a NULL region handle when the device context
 346      * has a clipping region results in an error. */
 347     ret = GetClipRgn(hdc, NULL);
 348     ok(ret == -1, "Expected GetClipRgn to return -1, got %d\n", ret);
 349
 350     ret = GetClipRgn(hdc, hrgn2);
 351     ok(ret == 1, "Expected GetClipRgn to return 1, got %d\n", ret);
 352
 353     ret = EqualRgn(hrgn, hrgn2);
 354     ok(ret == 1,
 355        "Expected EqualRgn to compare the two regions as equal, got %d\n", ret);
 356
 357     /* Try unsetting and then query the clipping region. */
 358     ret = SelectClipRgn(hdc, NULL);
 359     ok(ret == SIMPLEREGION || (ret == COMPLEXREGION && GetSystemMetrics(SM_CMONITORS) > 1),
 360        "Expected SelectClipRgn to return SIMPLEREGION, got %d\n", ret);
 361
 362     ret = GetClipRgn(hdc, NULL);
 363     ok(ret == 0 ||
 364        ret == -1 /* Win9x */,
 365        "Expected GetClipRgn to return 0, got %d\n", ret);
 366
 367     ret = GetClipRgn(hdc, hrgn3);
 368     ok(ret == 0, "Expected GetClipRgn to return 0, got %d\n", ret);
 369
 370     ret = EqualRgn(hrgn3, hrgn4);
 371     ok(ret == 1,
 372        "Expected EqualRgn to compare the two regions as equal, got %d\n", ret);
 373
 374     DeleteObject(hrgn4);
 375     DeleteObject(hrgn3);
 376     DeleteObject(hrgn2);
 377     DeleteObject(hrgn);
 378     ReleaseDC(NULL, hdc);
 379 }
 380
 381 static void test_memory_dc_clipping(void)
 382 {
 383     HDC hdc;
 384     HRGN hrgn, hrgn_empty;
 385     HBITMAP hbmp;
 386     RECT rc;
 387     int ret;
 388
 389     hdc = CreateCompatibleDC(0);
 390     hrgn_empty = CreateRectRgn(0, 0, 0, 0);
 391     hrgn = CreateRectRgn(0, 0, 0, 0);
 392     hbmp = CreateCompatibleBitmap(hdc, 100, 100);
 393
 394     ret = GetClipRgn(hdc, hrgn);
 395     ok(ret == 0, "expected 0, got %d\n", ret);
 396
 397     ret = ExtSelectClipRgn(hdc, hrgn_empty, RGN_DIFF);
 398     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 399
 400     ret = GetClipRgn(hdc, hrgn);
 401     ok(ret == 1, "expected 1, got %d\n", ret);
 402
 403     ret = GetRgnBox(hrgn, &rc);
 404     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 405     ok(rc.left == 0 && rc.top == 0 && rc.right == 1 && rc.bottom == 1,
 406        "expected 0,0-1,1, got %s\n", wine_dbgstr_rect(&rc));
 407
 408     ret = ExtSelectClipRgn(hdc, 0, RGN_COPY);
 409     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 410
 411     ret = GetClipRgn(hdc, hrgn);
 412     ok(ret == 0, "expected 0, got %d\n", ret);
 413
 414     ret = ExtSelectClipRgn(hdc, 0, RGN_DIFF);
 415     ok(ret == 0, "expected 0, got %d\n", ret);
 416
 417     ret = GetClipRgn(hdc, hrgn);
 418     ok(ret == 0, "expected 0, got %d\n", ret);
 419
 420     SelectObject(hdc, hbmp);
 421
 422     ret = ExtSelectClipRgn(hdc, hrgn_empty, RGN_DIFF);
 423     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 424
 425     ret = GetClipRgn(hdc, hrgn);
 426     ok(ret == 1, "expected 1, got %d\n", ret);
 427
 428     ret = GetRgnBox(hrgn, &rc);
 429     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 430     ok(rc.left == 0 && rc.top == 0 && rc.right == 100 && rc.bottom == 100,
 431        "expected 0,0-100,100, got %s\n", wine_dbgstr_rect(&rc));
 432
 433     SetRect( &rc, 10, 10, 20, 20 );
 434     ret = RectVisible( hdc, &rc );
 435     ok(ret, "RectVisible failed for %s\n", wine_dbgstr_rect(&rc));
 436
 437     SetRect( &rc, 20, 20, 10, 10 );
 438     ret = RectVisible( hdc, &rc );
 439     ok(ret, "RectVisible failed for %s\n", wine_dbgstr_rect(&rc));
 440
 441     ret = ExtSelectClipRgn(hdc, 0, RGN_DIFF);
 442     ok(ret == 0, "expected 0, got %d\n", ret);
 443
 444     ret = GetClipRgn(hdc, hrgn);
 445     ok(ret == 1, "expected 1, got %d\n", ret);
 446
 447     ret = GetRgnBox(hrgn, &rc);
 448     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 449     ok(rc.left == 0 && rc.top == 0 && rc.right == 100 && rc.bottom == 100,
 450        "expected 0,0-100,100, got %s\n", wine_dbgstr_rect(&rc));
 451
 452     DeleteDC(hdc);
 453     DeleteObject(hrgn);
 454     DeleteObject(hrgn_empty);
 455     DeleteObject(hbmp);
 456 }
 457
 458 static void test_window_dc_clipping(void)
 459 {
 460     HDC hdc;
 461     HRGN hrgn, hrgn_empty;
 462     HWND hwnd;
 463     RECT rc, virtual_rect;
 464     int ret, screen_width, screen_height;
 465
 466     /* Windows versions earlier than Win2k do not support the virtual screen metrics,
 467      * so we fall back to the primary screen metrics. */
 468     screen_width = GetSystemMetrics(SM_CXVIRTUALSCREEN);
 469     if(!screen_width) screen_width = GetSystemMetrics(SM_CXSCREEN);
 470     screen_height = GetSystemMetrics(SM_CYVIRTUALSCREEN);
 471     if(!screen_height) screen_height = GetSystemMetrics(SM_CYSCREEN);
 472     SetRect(&virtual_rect, GetSystemMetrics(SM_XVIRTUALSCREEN), GetSystemMetrics(SM_YVIRTUALSCREEN),
 473             GetSystemMetrics(SM_XVIRTUALSCREEN) + screen_width, GetSystemMetrics(SM_YVIRTUALSCREEN) + screen_height);
 474
 475     trace("screen resolution %d x %d\n", screen_width, screen_height);
 476
 477     hwnd = CreateWindowExA(0, "static", NULL, WS_POPUP,
 478                            -100, -100, screen_width * 2, screen_height * 2, 0, 0, 0, NULL);
 479     hdc = GetWindowDC(0);
 480     hrgn_empty = CreateRectRgn(0, 0, 0, 0);
 481     hrgn = CreateRectRgn(0, 0, 0, 0);
 482
 483     ret = GetClipRgn(hdc, hrgn);
 484     ok(ret == 0, "expected 0, got %d\n", ret);
 485
 486     ret = ExtSelectClipRgn(hdc, 0, RGN_DIFF);
 487     ok(ret == 0, "expected 0, got %d\n", ret);
 488
 489     ret = GetClipRgn(hdc, hrgn);
 490     ok(ret == 0, "expected 0, got %d\n", ret);
 491
 492     ret = ExtSelectClipRgn(hdc, hrgn_empty, RGN_DIFF);
 493     ok(ret == SIMPLEREGION || (ret == COMPLEXREGION && GetSystemMetrics(SM_CMONITORS) > 1),
 494        "expected SIMPLEREGION, got %d\n", ret);
 495
 496     ret = GetClipRgn(hdc, hrgn);
 497     ok(ret == 1, "expected 1, got %d\n", ret);
 498
 499     ret = GetRgnBox(hrgn, &rc);
 500     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 501     ok(EqualRect(&rc, &virtual_rect), "expected %s, got %s\n", wine_dbgstr_rect(&virtual_rect),
 502        wine_dbgstr_rect(&rc));
 503
 504     SetRect( &rc, 10, 10, 20, 20 );
 505     ret = RectVisible( hdc, &rc );
 506     ok( ret, "RectVisible failed for %s\n", wine_dbgstr_rect(&rc));
 507
 508     SetRect( &rc, 20, 20, 10, 10 );
 509     ret = RectVisible( hdc, &rc );
 510     ok( ret, "RectVisible failed for %s\n", wine_dbgstr_rect(&rc));
 511
 512     ret = ExtSelectClipRgn(hdc, 0, RGN_DIFF);
 513     ok(ret == 0, "expected 0, got %d\n", ret);
 514
 515     ret = GetClipRgn(hdc, hrgn);
 516     ok(ret == 1, "expected 1, got %d\n", ret);
 517
 518     ret = GetRgnBox(hrgn, &rc);
 519     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 520     ok(EqualRect(&rc, &virtual_rect), "expected %s, got %s\n", wine_dbgstr_rect(&virtual_rect),
 521        wine_dbgstr_rect(&rc));
 522
 523     ret = ExtSelectClipRgn(hdc, 0, RGN_COPY);
 524     ok(ret == SIMPLEREGION || (ret == COMPLEXREGION && GetSystemMetrics(SM_CMONITORS) > 1),
 525        "expected SIMPLEREGION, got %d\n", ret);
 526
 527     ret = GetClipRgn(hdc, hrgn);
 528     ok(ret == 0, "expected 0, got %d\n", ret);
 529
 530     DeleteDC(hdc);
 531     DeleteObject(hrgn);
 532     DeleteObject(hrgn_empty);
 533     DestroyWindow(hwnd);
 534 }
 535
 536
 537 START_TEST(clipping)
 538 {
 539     test_GetRandomRgn();
 540     test_ExtCreateRegion();
 541     test_GetClipRgn();
 542     test_memory_dc_clipping();
 543     test_window_dc_clipping();
 544 }