dlls/gdi32/tests/clipping.c

   1 /*
   2  * Unit test suite for clipping
   3  *
   4  * Copyright 2005 Huw Davies
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "wine/test.h"
  22 #include "winbase.h"
  23 #include "wingdi.h"
  24 #include "winuser.h"
  25
  26 static void test_GetRandomRgn(void)
  27 {
  28     HWND hwnd = CreateWindowExA(0,"BUTTON","test",WS_VISIBLE|WS_POPUP,0,0,100,100,GetDesktopWindow(),0,0,0);
  29     HDC hdc;
  30     HRGN hrgn = CreateRectRgn(0, 0, 0, 0);
  31     int ret;
  32     RECT rc, rc2;
  33     RECT ret_rc, window_rc;
  34
  35     ok( hwnd != 0, "CreateWindow failed\n" );
  36
  37     SetRect(&window_rc, 400, 300, 500, 400);
  38     SetWindowPos(hwnd, HWND_TOPMOST, window_rc.left, window_rc.top,
  39                  window_rc.right - window_rc.left, window_rc.bottom - window_rc.top, 0 );
  40     hdc = GetDC(hwnd);
  41
  42     ret = GetRandomRgn(hdc, hrgn, 1);
  43     ok(ret == 0, "GetRandomRgn rets %d\n", ret);
  44     ret = GetRandomRgn(hdc, hrgn, 2);
  45     ok(ret == 0, "GetRandomRgn rets %d\n", ret);
  46     ret = GetRandomRgn(hdc, hrgn, 3);
  47     ok(ret == 0, "GetRandomRgn rets %d\n", ret);
  48
  49     /* Set a clip region */
  50     SetRect(&rc, 20, 20, 80, 80);
  51     IntersectClipRect(hdc, rc.left, rc.top, rc.right, rc.bottom);
  52
  53     ret = GetRandomRgn(hdc, hrgn, 1);
  54     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  55     GetRgnBox(hrgn, &ret_rc);
  56     ok(EqualRect(&rc, &ret_rc), "GetRandomRgn %d,%d - %d,%d\n",
  57        ret_rc.left, ret_rc.top, ret_rc.right, ret_rc.bottom);
  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 %d,%d - %d,%d\n",
  66        ret_rc.left, ret_rc.top, ret_rc.right, ret_rc.bottom);
  67
  68     /* Move the clip to the meta and clear the clip */
  69     SetMetaRgn(hdc);
  70
  71     ret = GetRandomRgn(hdc, hrgn, 1);
  72     ok(ret == 0, "GetRandomRgn rets %d\n", ret);
  73     ret = GetRandomRgn(hdc, hrgn, 2);
  74     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  75     GetRgnBox(hrgn, &ret_rc);
  76     ok(EqualRect(&rc, &ret_rc), "GetRandomRgn %d,%d - %d,%d\n",
  77        ret_rc.left, ret_rc.top, ret_rc.right, ret_rc.bottom);
  78
  79     ret = GetRandomRgn(hdc, hrgn, 3);
  80     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  81     GetRgnBox(hrgn, &ret_rc);
  82     ok(EqualRect(&rc, &ret_rc), "GetRandomRgn %d,%d - %d,%d\n",
  83        ret_rc.left, ret_rc.top, ret_rc.right, ret_rc.bottom);
  84
  85     /* Set a new clip (still got the meta) */
  86     SetRect(&rc2, 10, 30, 70, 90);
  87     IntersectClipRect(hdc, rc2.left, rc2.top, rc2.right, rc2.bottom);
  88
  89     ret = GetRandomRgn(hdc, hrgn, 1);
  90     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  91     GetRgnBox(hrgn, &ret_rc);
  92     ok(EqualRect(&rc2, &ret_rc), "GetRandomRgn %d,%d - %d,%d\n",
  93        ret_rc.left, ret_rc.top, ret_rc.right, ret_rc.bottom);
  94
  95     ret = GetRandomRgn(hdc, hrgn, 2);
  96     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
  97     GetRgnBox(hrgn, &ret_rc);
  98     ok(EqualRect(&rc, &ret_rc), "GetRandomRgn %d,%d - %d,%d\n",
  99        ret_rc.left, ret_rc.top, ret_rc.right, ret_rc.bottom);
 100
 101     IntersectRect(&rc2, &rc, &rc2);
 102
 103     ret = GetRandomRgn(hdc, hrgn, 3);
 104     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
 105     GetRgnBox(hrgn, &ret_rc);
 106     ok(EqualRect(&rc2, &ret_rc), "GetRandomRgn %d,%d - %d,%d\n",
 107        ret_rc.left, ret_rc.top, ret_rc.right, ret_rc.bottom);
 108
 109
 110     ret = GetRandomRgn(hdc, hrgn, SYSRGN);
 111     ok(ret != 0, "GetRandomRgn rets %d\n", ret);
 112     GetRgnBox(hrgn, &ret_rc);
 113     if(GetVersion() & 0x80000000)
 114         OffsetRect(&window_rc, -window_rc.left, -window_rc.top);
 115     ok(EqualRect(&window_rc, &ret_rc) ||
 116        broken(IsRectEmpty(&ret_rc)), /* win95 */
 117        "GetRandomRgn %d,%d - %d,%d\n",
 118        ret_rc.left, ret_rc.top, ret_rc.right, ret_rc.bottom);
 119
 120     DeleteObject(hrgn);
 121     ReleaseDC(hwnd, hdc);
 122     DestroyWindow(hwnd);
 123 }
 124
 125 static void verify_region(HRGN hrgn, const RECT *rc)
 126 {
 127     union
 128     {
 129         RGNDATA data;
 130         char buf[sizeof(RGNDATAHEADER) + sizeof(RECT)];
 131     } rgn;
 132     const RECT *rect;
 133     DWORD ret;
 134
 135     ret = GetRegionData(hrgn, 0, NULL);
 136     if (IsRectEmpty(rc))
 137         ok(ret == sizeof(rgn.data.rdh), "expected sizeof(rdh), got %u\n", ret);
 138     else
 139         ok(ret == sizeof(rgn.data.rdh) + sizeof(RECT), "expected sizeof(rgn), got %u\n", ret);
 140
 141     if (!ret) return;
 142
 143     ret = GetRegionData(hrgn, sizeof(rgn), &rgn.data);
 144     if (IsRectEmpty(rc))
 145         ok(ret == sizeof(rgn.data.rdh), "expected sizeof(rdh), got %u\n", ret);
 146     else
 147         ok(ret == sizeof(rgn.data.rdh) + sizeof(RECT), "expected sizeof(rgn), got %u\n", ret);
 148
 149     trace("size %u, type %u, count %u, rgn size %u, bound (%d,%d-%d,%d)\n",
 150           rgn.data.rdh.dwSize, rgn.data.rdh.iType,
 151           rgn.data.rdh.nCount, rgn.data.rdh.nRgnSize,
 152           rgn.data.rdh.rcBound.left, rgn.data.rdh.rcBound.top,
 153           rgn.data.rdh.rcBound.right, rgn.data.rdh.rcBound.bottom);
 154     if (rgn.data.rdh.nCount != 0)
 155     {
 156         rect = (const RECT *)rgn.data.Buffer;
 157         trace("rect (%d,%d-%d,%d)\n", rect->left, rect->top, rect->right, rect->bottom);
 158         ok(EqualRect(rect, rc), "rects don't match\n");
 159     }
 160
 161     ok(rgn.data.rdh.dwSize == sizeof(rgn.data.rdh), "expected sizeof(rdh), got %u\n", rgn.data.rdh.dwSize);
 162     ok(rgn.data.rdh.iType == RDH_RECTANGLES, "expected RDH_RECTANGLES, got %u\n", rgn.data.rdh.iType);
 163     if (IsRectEmpty(rc))
 164     {
 165         ok(rgn.data.rdh.nCount == 0, "expected 0, got %u\n", rgn.data.rdh.nCount);
 166         ok(rgn.data.rdh.nRgnSize == 0 ||
 167            broken(rgn.data.rdh.nRgnSize == 168), /* NT4 */
 168            "expected 0, got %u\n", rgn.data.rdh.nRgnSize);
 169     }
 170     else
 171     {
 172         ok(rgn.data.rdh.nCount == 1, "expected 1, got %u\n", rgn.data.rdh.nCount);
 173         ok(rgn.data.rdh.nRgnSize == sizeof(RECT) ||
 174            broken(rgn.data.rdh.nRgnSize == 168), /* NT4 */
 175            "expected sizeof(RECT), got %u\n", rgn.data.rdh.nRgnSize);
 176     }
 177     ok(EqualRect(&rgn.data.rdh.rcBound, rc), "rects don't match\n");
 178 }
 179
 180 static void test_ExtCreateRegion(void)
 181 {
 182     static const RECT empty_rect;
 183     static const RECT rc = { 111, 222, 333, 444 };
 184     static const RECT rc_xformed = { 76, 151, 187, 262 };
 185     union
 186     {
 187         RGNDATA data;
 188         char buf[sizeof(RGNDATAHEADER) + sizeof(RECT)];
 189     } rgn;
 190     HRGN hrgn;
 191     XFORM xform;
 192
 193     if (0) /* crashes under Win9x */
 194     {
 195         SetLastError(0xdeadbeef);
 196         hrgn = ExtCreateRegion(NULL, 0, NULL);
 197         ok(!hrgn, "ExtCreateRegion should fail\n");
 198         ok(GetLastError() == ERROR_INVALID_PARAMETER, "ERROR_INVALID_PARAMETER, got %u\n", GetLastError());
 199     }
 200
 201     rgn.data.rdh.dwSize = 0;
 202     rgn.data.rdh.iType = 0;
 203     rgn.data.rdh.nCount = 0;
 204     rgn.data.rdh.nRgnSize = 0;
 205     SetRectEmpty(&rgn.data.rdh.rcBound);
 206     memcpy(rgn.data.Buffer, &rc, sizeof(rc));
 207
 208     SetLastError(0xdeadbeef);
 209     hrgn = ExtCreateRegion(NULL, sizeof(rgn), &rgn.data);
 210     ok(!hrgn, "ExtCreateRegion should fail\n");
 211     ok(GetLastError() == 0xdeadbeef, "0xdeadbeef, got %u\n", GetLastError());
 212
 213     rgn.data.rdh.dwSize = sizeof(rgn.data.rdh) - 1;
 214
 215     SetLastError(0xdeadbeef);
 216     hrgn = ExtCreateRegion(NULL, sizeof(rgn), &rgn.data);
 217     ok(!hrgn, "ExtCreateRegion should fail\n");
 218     ok(GetLastError() == 0xdeadbeef, "0xdeadbeef, got %u\n", GetLastError());
 219
 220     /* although XP doesn't care about the type Win9x does */
 221     rgn.data.rdh.iType = RDH_RECTANGLES;
 222     rgn.data.rdh.dwSize = sizeof(rgn.data.rdh);
 223
 224     SetLastError(0xdeadbeef);
 225     hrgn = ExtCreateRegion(NULL, sizeof(rgn), &rgn.data);
 226     ok(hrgn != 0, "ExtCreateRegion error %u\n", GetLastError());
 227     verify_region(hrgn, &empty_rect);
 228     DeleteObject(hrgn);
 229
 230     rgn.data.rdh.nCount = 1;
 231     SetRectEmpty(&rgn.data.rdh.rcBound);
 232     memcpy(rgn.data.Buffer, &rc, sizeof(rc));
 233
 234     SetLastError(0xdeadbeef);
 235     hrgn = ExtCreateRegion(NULL, sizeof(rgn), &rgn.data);
 236     ok(hrgn != 0, "ExtCreateRegion error %u\n", GetLastError());
 237     verify_region(hrgn, &rc);
 238     DeleteObject(hrgn);
 239
 240     rgn.data.rdh.dwSize = sizeof(rgn.data.rdh) + 1;
 241
 242     SetLastError(0xdeadbeef);
 243     hrgn = ExtCreateRegion(NULL, 1, &rgn.data);
 244     ok(hrgn != 0 ||
 245        broken(GetLastError() == 0xdeadbeef), /* NT4 */
 246        "ExtCreateRegion error %u\n", GetLastError());
 247     if(hrgn)
 248     {
 249         verify_region(hrgn, &rc);
 250         DeleteObject(hrgn);
 251     }
 252
 253     xform.eM11 = 0.5; /* 50% width */
 254     xform.eM12 = 0.0;
 255     xform.eM21 = 0.0;
 256     xform.eM22 = 0.5; /* 50% height */
 257     xform.eDx = 20.0;
 258     xform.eDy = 40.0;
 259
 260     rgn.data.rdh.dwSize = sizeof(rgn.data.rdh);
 261
 262     SetLastError(0xdeadbeef);
 263     hrgn = ExtCreateRegion(&xform, sizeof(rgn), &rgn.data);
 264     ok(hrgn != 0, "ExtCreateRegion error %u/%x\n", GetLastError(), GetLastError());
 265     verify_region(hrgn, &rc_xformed);
 266     DeleteObject(hrgn);
 267 }
 268
 269 static void test_GetClipRgn(void)
 270 {
 271     HDC hdc;
 272     HRGN hrgn, hrgn2, hrgn3, hrgn4;
 273     int ret;
 274
 275     /* Test calling GetClipRgn with NULL device context and region handles. */
 276     ret = GetClipRgn(NULL, NULL);
 277     ok(ret == -1, "Expected GetClipRgn to return -1, got %d\n", ret);
 278
 279     hdc = GetDC(NULL);
 280     ok(hdc != NULL, "Expected GetDC to return a valid device context handle\n");
 281
 282     /* Test calling GetClipRgn with a valid device context and NULL region. */
 283     ret = GetClipRgn(hdc, NULL);
 284     ok(ret == 0 ||
 285        ret == -1 /* Win9x */,
 286        "Expected GetClipRgn to return 0, got %d\n", ret);
 287
 288     /* Initialize the test regions. */
 289     hrgn = CreateRectRgn(100, 100, 100, 100);
 290     ok(hrgn != NULL,
 291        "Expected CreateRectRgn to return a handle to a new rectangular region\n");
 292
 293     hrgn2 = CreateRectRgn(1, 2, 3, 4);
 294     ok(hrgn2 != NULL,
 295        "Expected CreateRectRgn to return a handle to a new rectangular region\n");
 296
 297     hrgn3 = CreateRectRgn(1, 2, 3, 4);
 298     ok(hrgn3 != NULL,
 299        "Expected CreateRectRgn to return a handle to a new rectangular region\n");
 300
 301     hrgn4 = CreateRectRgn(1, 2, 3, 4);
 302     ok(hrgn4 != NULL,
 303        "Expected CreateRectRgn to return a handle to a new rectangular region\n");
 304
 305     /* Try getting a clipping region from the device context
 306      * when the device context's clipping region isn't set. */
 307     ret = GetClipRgn(hdc, hrgn2);
 308     ok(ret == 0, "Expected GetClipRgn to return 0, got %d\n", ret);
 309
 310     /* The region passed to GetClipRgn should be unchanged. */
 311     ret = EqualRgn(hrgn2, hrgn3);
 312     ok(ret == 1,
 313        "Expected EqualRgn to compare the two regions as equal, got %d\n", ret);
 314
 315     /* Try setting and getting back a clipping region. */
 316     ret = SelectClipRgn(hdc, hrgn);
 317     ok(ret == NULLREGION,
 318        "Expected SelectClipRgn to return NULLREGION, got %d\n", ret);
 319
 320     /* Passing a NULL region handle when the device context
 321      * has a clipping region results in an error. */
 322     ret = GetClipRgn(hdc, NULL);
 323     ok(ret == -1, "Expected GetClipRgn to return -1, got %d\n", ret);
 324
 325     ret = GetClipRgn(hdc, hrgn2);
 326     ok(ret == 1, "Expected GetClipRgn to return 1, got %d\n", ret);
 327
 328     ret = EqualRgn(hrgn, hrgn2);
 329     ok(ret == 1,
 330        "Expected EqualRgn to compare the two regions as equal, got %d\n", ret);
 331
 332     /* Try unsetting and then query the clipping region. */
 333     ret = SelectClipRgn(hdc, NULL);
 334     ok(ret == SIMPLEREGION,
 335        "Expected SelectClipRgn to return SIMPLEREGION, got %d\n", ret);
 336
 337     ret = GetClipRgn(hdc, NULL);
 338     ok(ret == 0 ||
 339        ret == -1 /* Win9x */,
 340        "Expected GetClipRgn to return 0, got %d\n", ret);
 341
 342     ret = GetClipRgn(hdc, hrgn3);
 343     ok(ret == 0, "Expected GetClipRgn to return 0, got %d\n", ret);
 344
 345     ret = EqualRgn(hrgn3, hrgn4);
 346     ok(ret == 1,
 347        "Expected EqualRgn to compare the two regions as equal, got %d\n", ret);
 348
 349     DeleteObject(hrgn4);
 350     DeleteObject(hrgn3);
 351     DeleteObject(hrgn2);
 352     DeleteObject(hrgn);
 353     ReleaseDC(NULL, hdc);
 354 }
 355
 356 static void test_memory_dc_clipping(void)
 357 {
 358     HDC hdc;
 359     HRGN hrgn, hrgn_empty;
 360     HBITMAP hbmp;
 361     RECT rc;
 362     int ret;
 363
 364     hdc = CreateCompatibleDC(0);
 365     hrgn_empty = CreateRectRgn(0, 0, 0, 0);
 366     hrgn = CreateRectRgn(0, 0, 0, 0);
 367     hbmp = CreateCompatibleBitmap(hdc, 100, 100);
 368
 369     ret = GetClipRgn(hdc, hrgn);
 370     ok(ret == 0, "expected 0, got %d\n", ret);
 371
 372     ret = ExtSelectClipRgn(hdc, hrgn_empty, RGN_DIFF);
 373     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 374
 375     ret = GetClipRgn(hdc, hrgn);
 376     ok(ret == 1, "expected 1, got %d\n", ret);
 377
 378     ret = GetRgnBox(hrgn, &rc);
 379     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 380     ok(rc.left == 0 && rc.top == 0 && rc.right == 1 && rc.bottom == 1,
 381        "expected 0,0-1,1, got %d,%d-%d,%d\n", rc.left, rc.top, rc.right, rc.bottom);
 382
 383     ret = ExtSelectClipRgn(hdc, 0, RGN_COPY);
 384     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 385
 386     ret = GetClipRgn(hdc, hrgn);
 387     ok(ret == 0, "expected 0, got %d\n", ret);
 388
 389     SelectObject(hdc, hbmp);
 390
 391     ret = ExtSelectClipRgn(hdc, hrgn_empty, RGN_DIFF);
 392     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 393
 394     ret = GetClipRgn(hdc, hrgn);
 395     ok(ret == 1, "expected 1, got %d\n", ret);
 396
 397     ret = GetRgnBox(hrgn, &rc);
 398     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 399     ok(rc.left == 0 && rc.top == 0 && rc.right == 100 && rc.bottom == 100,
 400        "expected 0,0-100,100, got %d,%d-%d,%d\n", rc.left, rc.top, rc.right, rc.bottom);
 401
 402     DeleteDC(hdc);
 403     DeleteObject(hrgn);
 404     DeleteObject(hrgn_empty);
 405     DeleteObject(hbmp);
 406 }
 407
 408 static void test_window_dc_clipping(void)
 409 {
 410     HDC hdc;
 411     HRGN hrgn, hrgn_empty;
 412     HWND hwnd;
 413     RECT rc;
 414     int ret, screen_width, screen_height;
 415
 416     /* Windows versions earlier than Win2k do not support the virtual screen metrics,
 417      * so we fall back to the primary screen metrics. */
 418     screen_width = GetSystemMetrics(SM_CXVIRTUALSCREEN);
 419     if(!screen_width) screen_width = GetSystemMetrics(SM_CXSCREEN);
 420     screen_height = GetSystemMetrics(SM_CYVIRTUALSCREEN);
 421     if(!screen_height) screen_height = GetSystemMetrics(SM_CYSCREEN);
 422
 423     trace("screen resolution %d x %d\n", screen_width, screen_height);
 424
 425     hwnd = CreateWindowExA(0, "static", NULL, WS_POPUP,
 426                            -100, -100, screen_width * 2, screen_height * 2, 0, 0, 0, NULL);
 427     hdc = GetWindowDC(0);
 428     hrgn_empty = CreateRectRgn(0, 0, 0, 0);
 429     hrgn = CreateRectRgn(0, 0, 0, 0);
 430
 431     ret = GetClipRgn(hdc, hrgn);
 432     ok(ret == 0, "expected 0, got %d\n", ret);
 433
 434     ret = ExtSelectClipRgn(hdc, hrgn_empty, RGN_DIFF);
 435     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 436
 437     ret = GetClipRgn(hdc, hrgn);
 438     ok(ret == 1, "expected 1, got %d\n", ret);
 439
 440     ret = GetRgnBox(hrgn, &rc);
 441     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 442     ok(rc.left == 0 && rc.top == 0 && rc.right == screen_width && rc.bottom == screen_height,
 443        "expected 0,0-%d,%d, got %d,%d-%d,%d\n", screen_width, screen_height,
 444         rc.left, rc.top, rc.right, rc.bottom);
 445
 446     ret = ExtSelectClipRgn(hdc, 0, RGN_COPY);
 447     ok(ret == SIMPLEREGION, "expected SIMPLEREGION, got %d\n", ret);
 448
 449     ret = GetClipRgn(hdc, hrgn);
 450     ok(ret == 0, "expected 0, got %d\n", ret);
 451
 452     DeleteDC(hdc);
 453     DeleteObject(hrgn);
 454     DeleteObject(hrgn_empty);
 455     DestroyWindow(hwnd);
 456 }
 457
 458
 459 START_TEST(clipping)
 460 {
 461     test_GetRandomRgn();
 462     test_ExtCreateRegion();
 463     test_GetClipRgn();
 464     test_memory_dc_clipping();
 465     test_window_dc_clipping();
 466 }