dlls/gdi32/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 #define WINVER 0x0501 /* request latest DEVMODE */
  23
  24 #include <assert.h>
  25 #include <stdio.h>
  26
  27 #include "wine/test.h"
  28 #include "winbase.h"
  29 #include "wingdi.h"
  30 #include "winuser.h"
  31 #include "winerror.h"
  32
  33 static void dump_region(HRGN hrgn)
  34 {
  35     DWORD i, size;
  36     RGNDATA *data = NULL;
  37     RECT *rect;
  38
  39     if (!hrgn)
  40     {
  41         printf( "(null) region\n" );
  42         return;
  43     }
  44     if (!(size = GetRegionData( hrgn, 0, NULL ))) return;
  45     if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return;
  46     GetRegionData( hrgn, size, data );
  47     printf( "%d rects:", data->rdh.nCount );
  48     for (i = 0, rect = (RECT *)data->Buffer; i < data->rdh.nCount; i++, rect++)
  49         printf( " (%d,%d)-(%d,%d)", rect->left, rect->top, rect->right, rect->bottom );
  50     printf( "\n" );
  51     HeapFree( GetProcessHeap(), 0, data );
  52 }
  53
  54 static void test_savedc_2(void)
  55 {
  56     HWND hwnd;
  57     HDC hdc;
  58     HRGN hrgn;
  59     RECT rc, rc_clip;
  60     int ret;
  61
  62     hwnd = CreateWindowExA(0, "static", "", WS_POPUP, 0,0,100,100,
  63                            0, 0, 0, NULL);
  64     assert(hwnd != 0);
  65     ShowWindow(hwnd, SW_SHOW);
  66     UpdateWindow(hwnd);
  67
  68     hrgn = CreateRectRgn(0, 0, 0, 0);
  69     assert(hrgn != 0);
  70
  71     hdc = GetDC(hwnd);
  72     ok(hdc != NULL, "CreateDC rets %p\n", hdc);
  73
  74     ret = GetClipBox(hdc, &rc_clip);
  75     ok(ret == SIMPLEREGION, "GetClipBox returned %d instead of SIMPLEREGION\n", ret);
  76     ret = GetClipRgn(hdc, hrgn);
  77     ok(ret == 0, "GetClipRgn returned %d instead of 0\n", ret);
  78     ret = GetRgnBox(hrgn, &rc);
  79     ok(ret == NULLREGION, "GetRgnBox returned %d (%d,%d-%d,%d) instead of NULLREGION\n",
  80        ret, rc.left, rc.top, rc.right, rc.bottom);
  81     /*dump_region(hrgn);*/
  82     SetRect(&rc, 0, 0, 100, 100);
  83     ok(EqualRect(&rc, &rc_clip),
  84        "rects are not equal: (%d,%d-%d,%d) - (%d,%d-%d,%d)\n",
  85        rc.left, rc.top, rc.right, rc.bottom,
  86        rc_clip.left, rc_clip.top, rc_clip.right, rc_clip.bottom);
  87
  88     ret = SaveDC(hdc);
  89 todo_wine
  90 {
  91     ok(ret == 1, "ret = %d\n", ret);
  92 }
  93
  94     ret = IntersectClipRect(hdc, 0, 0, 50, 50);
  95     if (ret == COMPLEXREGION)
  96     {
  97         /* XP returns COMPLEXREGION although dump_region reports only 1 rect */
  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     else
 105         ok(ret == SIMPLEREGION, "IntersectClipRect returned %d instead of SIMPLEREGION\n", ret);
 106
 107     ret = GetClipBox(hdc, &rc_clip);
 108     ok(ret == SIMPLEREGION, "GetClipBox returned %d instead of SIMPLEREGION\n", ret);
 109     SetRect(&rc, 0, 0, 50, 50);
 110     ok(EqualRect(&rc, &rc_clip), "rects are not equal\n");
 111
 112     ret = RestoreDC(hdc, 1);
 113     ok(ret, "ret = %d\n", ret);
 114
 115     ret = GetClipBox(hdc, &rc_clip);
 116     ok(ret == SIMPLEREGION, "GetClipBox returned %d instead of SIMPLEREGION\n", ret);
 117     SetRect(&rc, 0, 0, 100, 100);
 118     ok(EqualRect(&rc, &rc_clip), "rects are not equal\n");
 119
 120     DeleteObject(hrgn);
 121     ReleaseDC(hwnd, hdc);
 122     DestroyWindow(hwnd);
 123 }
 124
 125 static void test_savedc(void)
 126 {
 127     HDC hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
 128     int ret;
 129
 130     ok(hdc != NULL, "CreateDC rets %p\n", hdc);
 131
 132     ret = SaveDC(hdc);
 133     ok(ret == 1, "ret = %d\n", ret);
 134     ret = SaveDC(hdc);
 135     ok(ret == 2, "ret = %d\n", ret);
 136     ret = SaveDC(hdc);
 137     ok(ret == 3, "ret = %d\n", ret);
 138     ret = RestoreDC(hdc, -1);
 139     ok(ret, "ret = %d\n", ret);
 140     ret = SaveDC(hdc);
 141     ok(ret == 3, "ret = %d\n", ret);
 142     ret = RestoreDC(hdc, 1);
 143     ok(ret, "ret = %d\n", ret);
 144     ret = SaveDC(hdc);
 145     ok(ret == 1, "ret = %d\n", ret);
 146     ret = SaveDC(hdc);
 147     ok(ret == 2, "ret = %d\n", ret);
 148     ret = SaveDC(hdc);
 149     ok(ret == 3, "ret = %d\n", ret);
 150     ret = RestoreDC(hdc, -2);
 151     ok(ret, "ret = %d\n", ret);
 152     ret = SaveDC(hdc);
 153     ok(ret == 2, "ret = %d\n", ret);
 154     ret = RestoreDC(hdc, -2);
 155     ok(ret, "ret = %d\n", ret);
 156     ret = SaveDC(hdc);
 157     ok(ret == 1, "ret = %d\n", ret);
 158     ret = SaveDC(hdc);
 159     ok(ret == 2, "ret = %d\n", ret);
 160     ret = RestoreDC(hdc, -4);
 161     ok(!ret, "ret = %d\n", ret);
 162     ret = RestoreDC(hdc, 3);
 163     ok(!ret, "ret = %d\n", ret);
 164
 165     /* Under win98 the following two succeed and both clear the save stack
 166     ret = RestoreDC(hdc, -3);
 167     ok(!ret, "ret = %d\n", ret);
 168     ret = RestoreDC(hdc, 0);
 169     ok(!ret, "ret = %d\n", ret);
 170     */
 171
 172     ret = RestoreDC(hdc, 1);
 173     ok(ret, "ret = %d\n", ret);
 174
 175     DeleteDC(hdc);
 176 }
 177
 178 static void test_GdiConvertToDevmodeW(void)
 179 {
 180     DEVMODEW * (WINAPI *pGdiConvertToDevmodeW)(const DEVMODEA *);
 181     DEVMODEA dmA;
 182     DEVMODEW *dmW;
 183     BOOL ret;
 184
 185     pGdiConvertToDevmodeW = (void *)GetProcAddress(GetModuleHandleA("gdi32.dll"), "GdiConvertToDevmodeW");
 186     if (!pGdiConvertToDevmodeW)
 187     {
 188         win_skip("GdiConvertToDevmodeW is not available on this platform\n");
 189         return;
 190     }
 191
 192     ret = EnumDisplaySettingsA(NULL, ENUM_CURRENT_SETTINGS, &dmA);
 193     ok(ret, "EnumDisplaySettingsExA error %u\n", GetLastError());
 194     ok(dmA.dmSize >= FIELD_OFFSET(DEVMODEA, dmICMMethod), "dmSize is too small: %04x\n", dmA.dmSize);
 195     ok(dmA.dmSize <= sizeof(DEVMODEA), "dmSize is too large: %04x\n", dmA.dmSize);
 196
 197     dmW = pGdiConvertToDevmodeW(&dmA);
 198     ok(dmW->dmSize >= FIELD_OFFSET(DEVMODEW, dmICMMethod), "dmSize is too small: %04x\n", dmW->dmSize);
 199     ok(dmW->dmSize <= sizeof(DEVMODEW), "dmSize is too large: %04x\n", dmW->dmSize);
 200     HeapFree(GetProcessHeap(), 0, dmW);
 201
 202     dmA.dmSize = FIELD_OFFSET(DEVMODEA, dmFields) + sizeof(dmA.dmFields);
 203     dmW = pGdiConvertToDevmodeW(&dmA);
 204     ok(dmW->dmSize == FIELD_OFFSET(DEVMODEW, dmFields) + sizeof(dmW->dmFields),
 205        "wrong size %u\n", dmW->dmSize);
 206     HeapFree(GetProcessHeap(), 0, dmW);
 207
 208     dmA.dmICMMethod = DMICMMETHOD_NONE;
 209     dmA.dmSize = FIELD_OFFSET(DEVMODEA, dmICMMethod) + sizeof(dmA.dmICMMethod);
 210     dmW = pGdiConvertToDevmodeW(&dmA);
 211     ok(dmW->dmSize == FIELD_OFFSET(DEVMODEW, dmICMMethod) + sizeof(dmW->dmICMMethod),
 212        "wrong size %u\n", dmW->dmSize);
 213     ok(dmW->dmICMMethod == DMICMMETHOD_NONE,
 214        "expected DMICMMETHOD_NONE, got %u\n", dmW->dmICMMethod);
 215     HeapFree(GetProcessHeap(), 0, dmW);
 216
 217     dmA.dmSize = 1024;
 218     dmW = pGdiConvertToDevmodeW(&dmA);
 219     ok(dmW->dmSize == FIELD_OFFSET(DEVMODEW, dmPanningHeight) + sizeof(dmW->dmPanningHeight),
 220        "wrong size %u\n", dmW->dmSize);
 221     HeapFree(GetProcessHeap(), 0, dmW);
 222
 223     SetLastError(0xdeadbeef);
 224     dmA.dmSize = 0;
 225     dmW = pGdiConvertToDevmodeW(&dmA);
 226     ok(!dmW, "GdiConvertToDevmodeW should fail\n");
 227     ok(GetLastError() == 0xdeadbeef, "expected 0xdeadbeef, got %u\n", GetLastError());
 228
 229     /* this is the minimal dmSize that XP accepts */
 230     dmA.dmSize = FIELD_OFFSET(DEVMODEA, dmFields);
 231     dmW = pGdiConvertToDevmodeW(&dmA);
 232     ok(dmW->dmSize == FIELD_OFFSET(DEVMODEW, dmFields),
 233        "expected %04x, got %04x\n", FIELD_OFFSET(DEVMODEW, dmFields), dmW->dmSize);
 234     HeapFree(GetProcessHeap(), 0, dmW);
 235 }
 236
 237 static void test_CreateCompatibleDC(void)
 238 {
 239     BOOL bRet;
 240     HDC hDC;
 241     HDC hNewDC;
 242
 243     /* Create a DC compatible with the screen */
 244     hDC = CreateCompatibleDC(NULL);
 245     ok(hDC != NULL, "CreateCompatibleDC returned %p\n", hDC);
 246
 247     /* Delete this DC, this should succeed */
 248     bRet = DeleteDC(hDC);
 249     ok(bRet == TRUE, "DeleteDC returned %u\n", bRet);
 250
 251     /* Try to create a DC compatible to the deleted DC. This has to fail */
 252     hNewDC = CreateCompatibleDC(hDC);
 253     ok(hNewDC == NULL, "CreateCompatibleDC returned %p\n", hNewDC);
 254 }
 255
 256 static void test_DC_bitmap(void)
 257 {
 258     HDC hdc, hdcmem;
 259     DWORD bits[64];
 260     HBITMAP hbmp, oldhbmp;
 261     COLORREF col;
 262     int i, bitspixel;
 263
 264     /* fill bitmap data with b&w pattern */
 265     for( i = 0; i < 64; i++) bits[i] = i & 1 ? 0 : 0xffffff;
 266
 267     hdc = GetDC(0);
 268     ok( hdc != NULL, "CreateDC rets %p\n", hdc);
 269     bitspixel = GetDeviceCaps( hdc, BITSPIXEL);
 270     /* create a memory dc */
 271     hdcmem = CreateCompatibleDC( hdc);
 272     ok( hdcmem != NULL, "CreateCompatibleDC rets %p\n", hdcmem);
 273     /* tests */
 274     /* test monochrome bitmap: should always work */
 275     hbmp = CreateBitmap(32, 32, 1, 1, bits);
 276     ok( hbmp != NULL, "CreateBitmap returns %p\n", hbmp);
 277     oldhbmp = SelectObject( hdcmem, hbmp);
 278     ok( oldhbmp != NULL, "SelectObject returned NULL\n" ); /* a memdc always has a bitmap selected */
 279     col = GetPixel( hdcmem, 0, 0);
 280     ok( col == 0xffffff, "GetPixel returned %08x, expected 00ffffff\n", col);
 281     col = GetPixel( hdcmem, 1, 1);
 282     ok( col == 0x000000, "GetPixel returned %08x, expected 00000000\n", col);
 283     col = GetPixel( hdcmem, 100, 1);
 284     ok( col == CLR_INVALID, "GetPixel returned %08x, expected ffffffff\n", col);
 285     SelectObject( hdcmem, oldhbmp);
 286     DeleteObject( hbmp);
 287
 288     /* test with 2 bits color depth, not likely to succeed */
 289     hbmp = CreateBitmap(16, 16, 1, 2, bits);
 290     ok( hbmp != NULL, "CreateBitmap returns %p\n", hbmp);
 291     oldhbmp = SelectObject( hdcmem, hbmp);
 292     if( bitspixel != 2)
 293         ok( !oldhbmp, "SelectObject of a bitmap with 2 bits/pixel should return  NULL\n");
 294     if( oldhbmp) SelectObject( hdcmem, oldhbmp);
 295     DeleteObject( hbmp);
 296
 297     /* test with 16 bits color depth, might succeed */
 298     hbmp = CreateBitmap(6, 6, 1, 16, bits);
 299     ok( hbmp != NULL, "CreateBitmap returns %p\n", hbmp);
 300     oldhbmp = SelectObject( hdcmem, hbmp);
 301     if( bitspixel == 16) {
 302         ok( oldhbmp != NULL, "SelectObject returned NULL\n" );
 303         col = GetPixel( hdcmem, 0, 0);
 304         ok( col == 0xffffff,
 305             "GetPixel of a bitmap with 16 bits/pixel returned %08x, expected 00ffffff\n", col);
 306         col = GetPixel( hdcmem, 1, 1);
 307         ok( col == 0x000000,
 308             "GetPixel of a bitmap with 16 bits/pixel returned returned %08x, expected 00000000\n", col);
 309     }
 310     if( oldhbmp) SelectObject( hdcmem, oldhbmp);
 311     DeleteObject( hbmp);
 312
 313     /* test with 32 bits color depth, probably succeed */
 314     hbmp = CreateBitmap(4, 4, 1, 32, bits);
 315     ok( hbmp != NULL, "CreateBitmap returns %p\n", hbmp);
 316     oldhbmp = SelectObject( hdcmem, hbmp);
 317     if( bitspixel == 32) {
 318         ok( oldhbmp != NULL, "SelectObject returned NULL\n" );
 319         col = GetPixel( hdcmem, 0, 0);
 320         ok( col == 0xffffff,
 321             "GetPixel of a bitmap with 32 bits/pixel returned %08x, expected 00ffffff\n", col);
 322         col = GetPixel( hdcmem, 1, 1);
 323         ok( col == 0x000000,
 324             "GetPixel of a bitmap with 32 bits/pixel returned returned %08x, expected 00000000\n", col);
 325     }
 326     if( oldhbmp) SelectObject( hdcmem, oldhbmp);
 327     DeleteObject( hbmp);
 328     ReleaseDC( 0, hdc );
 329 }
 330
 331 START_TEST(dc)
 332 {
 333     test_savedc();
 334     test_savedc_2();
 335     test_GdiConvertToDevmodeW();
 336     test_CreateCompatibleDC();
 337     test_DC_bitmap();
 338 }