1 /*
2  * Some tests for OpenGL functions
3  *
4  * Copyright (C) 2007-2008 Roderick Colenbrander
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 <windows.h>
22 #include <wingdi.h>
23 #include "wine/test.h"
24 #include "wine/wgl.h"
25 
26 #define MAX_FORMATS 256
27 
28 /* WGL_ARB_create_context */
29 static HGLRC (WINAPI *pwglCreateContextAttribsARB)(HDC hDC, HGLRC hShareContext, const int *attribList);
30 
31 /* WGL_ARB_extensions_string */
32 static const char* (WINAPI *pwglGetExtensionsStringARB)(HDC);
33 static int (WINAPI *pwglReleasePbufferDCARB)(HPBUFFERARB, HDC);
34 
35 /* WGL_ARB_make_current_read */
36 static BOOL (WINAPI *pwglMakeContextCurrentARB)(HDC hdraw, HDC hread, HGLRC hglrc);
37 static HDC (WINAPI *pwglGetCurrentReadDCARB)(void);
38 
39 /* WGL_ARB_pixel_format */
40 static BOOL (WINAPI *pwglChoosePixelFormatARB)(HDC, const int *, const FLOAT *, UINT, int *, UINT *);
41 static BOOL (WINAPI *pwglGetPixelFormatAttribivARB)(HDC, int, int, UINT, const int *, int *);
42 
43 /* WGL_ARB_pbuffer */
44 static HPBUFFERARB (WINAPI *pwglCreatePbufferARB)(HDC, int, int, int, const int *);
45 static HDC (WINAPI *pwglGetPbufferDCARB)(HPBUFFERARB);
46 
47 /* WGL_EXT_swap_control */
48 static BOOL (WINAPI *pwglSwapIntervalEXT)(int interval);
49 static int (WINAPI *pwglGetSwapIntervalEXT)(void);
50 
51 static const char* wgl_extensions = NULL;
52 
53 static void init_functions(void)
54 {
55 #define GET_PROC(func) \
56     p ## func = (void*)wglGetProcAddress(#func); \
57     if(!p ## func) \
58       trace("wglGetProcAddress(%s) failed\n", #func);
59 
60     /* WGL_ARB_create_context */
61     GET_PROC(wglCreateContextAttribsARB);
62 
63     /* WGL_ARB_extensions_string */
64     GET_PROC(wglGetExtensionsStringARB)
65 
66     /* WGL_ARB_make_current_read */
67     GET_PROC(wglMakeContextCurrentARB);
68     GET_PROC(wglGetCurrentReadDCARB);
69 
70     /* WGL_ARB_pixel_format */
71     GET_PROC(wglChoosePixelFormatARB)
72     GET_PROC(wglGetPixelFormatAttribivARB)
73 
74     /* WGL_ARB_pbuffer */
75     GET_PROC(wglCreatePbufferARB)
76     GET_PROC(wglGetPbufferDCARB)
77     GET_PROC(wglReleasePbufferDCARB)
78 
79     /* WGL_EXT_swap_control */
80     GET_PROC(wglSwapIntervalEXT)
81     GET_PROC(wglGetSwapIntervalEXT)
82 
83 #undef GET_PROC
84 }
85 
86 static BOOL gl_extension_supported(const char *extensions, const char *extension_string)
87 {
88     size_t ext_str_len = strlen(extension_string);
89 
90     while (*extensions)
91     {
92         const char *start;
93         size_t len;
94 
95         while (isspace(*extensions))
96             ++extensions;
97         start = extensions;
98         while (!isspace(*extensions) && *extensions)
99             ++extensions;
100 
101         len = extensions - start;
102         if (!len)
103             continue;
104 
105         if (len == ext_str_len && !memcmp(start, extension_string, ext_str_len))
106         {
107             return TRUE;
108         }
109     }
110     return FALSE;
111 }
112 
113 static void test_pbuffers(HDC hdc)
114 {
115     const int iAttribList[] = { WGL_DRAW_TO_PBUFFER_ARB, 1, /* Request pbuffer support */
116                                 0 };
117     int iFormats[MAX_FORMATS];
118     unsigned int nOnscreenFormats;
119     unsigned int nFormats;
120     int i, res;
121     int iPixelFormat = 0;
122 
123     nOnscreenFormats = DescribePixelFormat(hdc, 0, 0, NULL);
124 
125     /* When you want to render to a pbuffer you need to call wglGetPbufferDCARB which
126      * returns a 'magic' HDC which you can then pass to wglMakeCurrent to switch rendering
127      * to the pbuffer. Below some tests are performed on what happens if you use standard WGL calls
128      * on this 'magic' HDC for both a pixelformat that support onscreen and offscreen rendering
129      * and a pixelformat that's only available for offscreen rendering (this means that only
130      * wglChoosePixelFormatARB and friends know about the format.
131      *
132      * The first thing we need are pixelformats with pbuffer capabilities.
133      */
134     res = pwglChoosePixelFormatARB(hdc, iAttribList, NULL, MAX_FORMATS, iFormats, &nFormats);
135     if(res <= 0)
136     {
137         skip("No pbuffer compatible formats found while WGL_ARB_pbuffer is supported\n");
138         return;
139     }
140     trace("nOnscreenFormats: %d\n", nOnscreenFormats);
141     trace("Total number of pbuffer capable pixelformats: %d\n", nFormats);
142 
143     /* Try to select an onscreen pixelformat out of the list */
144     for(i=0; i < nFormats; i++)
145     {
146         /* Check if the format is onscreen, if it is choose it */
147         if(iFormats[i] <= nOnscreenFormats)
148         {
149             iPixelFormat = iFormats[i];
150             trace("Selected iPixelFormat=%d\n", iPixelFormat);
151             break;
152         }
153     }
154 
155     /* A video driver supports a large number of onscreen and offscreen pixelformats.
156      * The traditional WGL calls only see a subset of the whole pixelformat list. First
157      * of all they only see the onscreen formats (the offscreen formats are at the end of the
158      * pixelformat list) and second extended pixelformat capabilities are hidden from the
159      * standard WGL calls. Only functions that depend on WGL_ARB_pixel_format can see them.
160      *
161      * Below we check if the pixelformat is also supported onscreen.
162      */
163     if(iPixelFormat != 0)
164     {
165         HDC pbuffer_hdc;
166         int attrib = 0;
167         HPBUFFERARB pbuffer = pwglCreatePbufferARB(hdc, iPixelFormat, 640 /* width */, 480 /* height */, &attrib);
168         if(!pbuffer)
169             skip("Pbuffer creation failed!\n");
170 
171         /* Test the pixelformat returned by GetPixelFormat on a pbuffer as the behavior is not clear */
172         pbuffer_hdc = pwglGetPbufferDCARB(pbuffer);
173         res = GetPixelFormat(pbuffer_hdc);
174         ok(res == iPixelFormat, "Unexpected iPixelFormat=%d returned by GetPixelFormat for format %d\n", res, iPixelFormat);
175         trace("iPixelFormat returned by GetPixelFormat: %d\n", res);
176         trace("PixelFormat from wglChoosePixelFormatARB: %d\n", iPixelFormat);
177 
178         pwglReleasePbufferDCARB(pbuffer, pbuffer_hdc);
179     }
180     else skip("Pbuffer test for onscreen pixelformat skipped as no onscreen format with pbuffer capabilities have been found\n");
181 
182     /* Search for a real offscreen format */
183     for(i=0, iPixelFormat=0; i<nFormats; i++)
184     {
185         if(iFormats[i] > nOnscreenFormats)
186         {
187             iPixelFormat = iFormats[i];
188             trace("Selected iPixelFormat: %d\n", iPixelFormat);
189             break;
190         }
191     }
192 
193     if(iPixelFormat != 0)
194     {
195         HDC pbuffer_hdc;
196         HPBUFFERARB pbuffer = pwglCreatePbufferARB(hdc, iPixelFormat, 640 /* width */, 480 /* height */, NULL);
197         if(!pbuffer)
198             skip("Pbuffer creation failed!\n");
199 
200         /* Test the pixelformat returned by GetPixelFormat on a pbuffer as the behavior is not clear */
201         pbuffer_hdc = pwglGetPbufferDCARB(pbuffer);
202         res = GetPixelFormat(pbuffer_hdc);
203 
204         ok(res == 1, "Unexpected iPixelFormat=%d (1 expected) returned by GetPixelFormat for offscreen format %d\n", res, iPixelFormat);
205         trace("iPixelFormat returned by GetPixelFormat: %d\n", res);
206         trace("PixelFormat from wglChoosePixelFormatARB: %d\n", iPixelFormat);
207         pwglReleasePbufferDCARB(pbuffer, hdc);
208     }
209     else skip("Pbuffer test for offscreen pixelformat skipped as no offscreen-only format with pbuffer capabilities has been found\n");
210 }
211 
212 static int test_pfd(const PIXELFORMATDESCRIPTOR *pfd)
213 {
214     int pf;
215     HDC hdc;
216     HWND hwnd;
217 
218     hwnd = CreateWindowA("static", "Title", WS_OVERLAPPEDWINDOW, 10, 10, 200, 200, NULL, NULL,
219             NULL, NULL);
220     if (!hwnd)
221         return 0;
222 
223     hdc = GetDC( hwnd );
224     pf = ChoosePixelFormat( hdc, pfd );
225     ReleaseDC( hwnd, hdc );
226     DestroyWindow( hwnd );
227 
228     return pf;
229 }
230 
231 static void test_choosepixelformat(void)
232 {
233     PIXELFORMATDESCRIPTOR pfd = {
234         sizeof(PIXELFORMATDESCRIPTOR),
235         1,                     /* version */
236         PFD_DRAW_TO_WINDOW |
237         PFD_SUPPORT_OPENGL |
238         PFD_TYPE_RGBA,
239         0,                     /* color depth */
240         0, 0, 0, 0, 0, 0,      /* color bits */
241         0,                     /* alpha buffer */
242         0,                     /* shift bit */
243         0,                     /* accumulation buffer */
244         0, 0, 0, 0,            /* accum bits */
245         0,                     /* z-buffer */
246         0,                     /* stencil buffer */
247         0,                     /* auxiliary buffer */
248         PFD_MAIN_PLANE,        /* main layer */
249         0,                     /* reserved */
250         0, 0, 0                /* layer masks */
251     };
252 
253     ok( test_pfd(&pfd), "Simple pfd failed\n" );
254     pfd.dwFlags |= PFD_DOUBLEBUFFER_DONTCARE;
255     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE failed\n" );
256     pfd.dwFlags |= PFD_STEREO_DONTCARE;
257     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE|PFD_STEREO_DONTCARE failed\n" );
258     pfd.dwFlags &= ~PFD_DOUBLEBUFFER_DONTCARE;
259     ok( test_pfd(&pfd), "PFD_STEREO_DONTCARE failed\n" );
260     pfd.dwFlags &= ~PFD_STEREO_DONTCARE;
261 
262     pfd.cColorBits = 32;
263     ok( test_pfd(&pfd), "Simple pfd failed\n" );
264     pfd.dwFlags |= PFD_DOUBLEBUFFER_DONTCARE;
265     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE failed\n" );
266     pfd.dwFlags |= PFD_STEREO_DONTCARE;
267     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE|PFD_STEREO_DONTCARE failed\n" );
268     pfd.dwFlags &= ~PFD_DOUBLEBUFFER_DONTCARE;
269     ok( test_pfd(&pfd), "PFD_STEREO_DONTCARE failed\n" );
270     pfd.dwFlags &= ~PFD_STEREO_DONTCARE;
271     pfd.cColorBits = 0;
272 
273     pfd.cAlphaBits = 8;
274     ok( test_pfd(&pfd), "Simple pfd failed\n" );
275     pfd.dwFlags |= PFD_DOUBLEBUFFER_DONTCARE;
276     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE failed\n" );
277     pfd.dwFlags |= PFD_STEREO_DONTCARE;
278     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE|PFD_STEREO_DONTCARE failed\n" );
279     pfd.dwFlags &= ~PFD_DOUBLEBUFFER_DONTCARE;
280     ok( test_pfd(&pfd), "PFD_STEREO_DONTCARE failed\n" );
281     pfd.dwFlags &= ~PFD_STEREO_DONTCARE;
282     pfd.cAlphaBits = 0;
283 
284     pfd.cStencilBits = 8;
285     ok( test_pfd(&pfd), "Simple pfd failed\n" );
286     pfd.dwFlags |= PFD_DOUBLEBUFFER_DONTCARE;
287     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE failed\n" );
288     pfd.dwFlags |= PFD_STEREO_DONTCARE;
289     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE|PFD_STEREO_DONTCARE failed\n" );
290     pfd.dwFlags &= ~PFD_DOUBLEBUFFER_DONTCARE;
291     ok( test_pfd(&pfd), "PFD_STEREO_DONTCARE failed\n" );
292     pfd.dwFlags &= ~PFD_STEREO_DONTCARE;
293     pfd.cStencilBits = 0;
294 
295     pfd.cAuxBuffers = 1;
296     ok( test_pfd(&pfd), "Simple pfd failed\n" );
297     pfd.dwFlags |= PFD_DOUBLEBUFFER_DONTCARE;
298     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE failed\n" );
299     pfd.dwFlags |= PFD_STEREO_DONTCARE;
300     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE|PFD_STEREO_DONTCARE failed\n" );
301     pfd.dwFlags &= ~PFD_DOUBLEBUFFER_DONTCARE;
302     ok( test_pfd(&pfd), "PFD_STEREO_DONTCARE failed\n" );
303     pfd.dwFlags &= ~PFD_STEREO_DONTCARE;
304     pfd.cAuxBuffers = 0;
305 }
306 
307 static void test_setpixelformat(HDC winhdc)
308 {
309     int res = 0;
310     int nCfgs;
311     int pf;
312     int i;
313     HWND hwnd;
314     PIXELFORMATDESCRIPTOR pfd = {
315         sizeof(PIXELFORMATDESCRIPTOR),
316         1,                     /* version */
317         PFD_DRAW_TO_WINDOW |
318         PFD_SUPPORT_OPENGL |
319         PFD_DOUBLEBUFFER,
320         PFD_TYPE_RGBA,
321         24,                    /* 24-bit color depth */
322         0, 0, 0, 0, 0, 0,      /* color bits */
323         0,                     /* alpha buffer */
324         0,                     /* shift bit */
325         0,                     /* accumulation buffer */
326         0, 0, 0, 0,            /* accum bits */
327         32,                    /* z-buffer */
328         0,                     /* stencil buffer */
329         0,                     /* auxiliary buffer */
330         PFD_MAIN_PLANE,        /* main layer */
331         0,                     /* reserved */
332         0, 0, 0                /* layer masks */
333     };
334 
335     HDC hdc = GetDC(0);
336     ok(hdc != 0, "GetDC(0) failed!\n");
337 
338     /* This should pass even on the main device context */
339     pf = ChoosePixelFormat(hdc, &pfd);
340     ok(pf != 0, "ChoosePixelFormat failed on main device context\n");
341 
342     /* SetPixelFormat on the main device context 'X root window' should fail,
343      * but some broken drivers allow it
344      */
345     res = SetPixelFormat(hdc, pf, &pfd);
346     trace("SetPixelFormat on main device context %s\n", res ? "succeeded" : "failed");
347 
348     /* Setting the same format that was set on the HDC is allowed; other
349        formats fail */
350     nCfgs = DescribePixelFormat(winhdc, 0, 0, NULL);
351     pf = GetPixelFormat(winhdc);
352     for(i = 1;i <= nCfgs;i++)
353     {
354         int res = SetPixelFormat(winhdc, i, NULL);
355         if(i == pf) ok(res, "Failed to set the same pixel format\n");
356         else ok(!res, "Unexpectedly set an alternate pixel format\n");
357     }
358 
359     hwnd = CreateWindowA("static", "Title", WS_OVERLAPPEDWINDOW, 10, 10, 200, 200, NULL, NULL,
360             NULL, NULL);
361     ok(hwnd != NULL, "err: %d\n", GetLastError());
362     if (hwnd)
363     {
364         HDC hdc = GetDC( hwnd );
365         pf = ChoosePixelFormat( hdc, &pfd );
366         ok( pf != 0, "ChoosePixelFormat failed\n" );
367         res = SetPixelFormat( hdc, pf, &pfd );
368         ok( res != 0, "SetPixelFormat failed\n" );
369         i = GetPixelFormat( hdc );
370         ok( i == pf, "GetPixelFormat returned wrong format %d/%d\n", i, pf );
371         ReleaseDC( hwnd, hdc );
372         hdc = GetWindowDC( hwnd );
373         i = GetPixelFormat( hdc );
374         ok( i == pf, "GetPixelFormat returned wrong format %d/%d\n", i, pf );
375         ReleaseDC( hwnd, hdc );
376         DestroyWindow( hwnd );
377         /* check various calls with invalid hdc */
378         SetLastError( 0xdeadbeef );
379         i = GetPixelFormat( hdc );
380         ok( i == 0, "GetPixelFormat succeeded\n" );
381         ok( GetLastError() == ERROR_INVALID_PIXEL_FORMAT, "wrong error %u\n", GetLastError() );
382         SetLastError( 0xdeadbeef );
383         res = SetPixelFormat( hdc, pf, &pfd );
384         ok( !res, "SetPixelFormat succeeded\n" );
385         ok( GetLastError() == ERROR_INVALID_HANDLE, "wrong error %u\n", GetLastError() );
386         SetLastError( 0xdeadbeef );
387         res = DescribePixelFormat( hdc, 0, 0, NULL );
388         ok( !res, "DescribePixelFormat succeeded\n" );
389         ok( GetLastError() == ERROR_INVALID_HANDLE, "wrong error %u\n", GetLastError() );
390         SetLastError( 0xdeadbeef );
391         pf = ChoosePixelFormat( hdc, &pfd );
392         ok( !pf, "ChoosePixelFormat succeeded\n" );
393         ok( GetLastError() == ERROR_INVALID_HANDLE, "wrong error %u\n", GetLastError() );
394         SetLastError( 0xdeadbeef );
395         res = SwapBuffers( hdc );
396         ok( !res, "SwapBuffers succeeded\n" );
397         ok( GetLastError() == ERROR_INVALID_HANDLE, "wrong error %u\n", GetLastError() );
398         SetLastError( 0xdeadbeef );
399         ok( !wglCreateContext( hdc ), "CreateContext succeeded\n" );
400         ok( GetLastError() == ERROR_INVALID_HANDLE, "wrong error %u\n", GetLastError() );
401     }
402 
403     hwnd = CreateWindowA("static", "Title", WS_OVERLAPPEDWINDOW, 10, 10, 200, 200, NULL, NULL,
404             NULL, NULL);
405     ok(hwnd != NULL, "err: %d\n", GetLastError());
406     if (hwnd)
407     {
408         HDC hdc = GetWindowDC( hwnd );
409         pf = ChoosePixelFormat( hdc, &pfd );
410         ok( pf != 0, "ChoosePixelFormat failed\n" );
411         res = SetPixelFormat( hdc, pf, &pfd );
412         ok( res != 0, "SetPixelFormat failed\n" );
413         i = GetPixelFormat( hdc );
414         ok( i == pf, "GetPixelFormat returned wrong format %d/%d\n", i, pf );
415         ReleaseDC( hwnd, hdc );
416         DestroyWindow( hwnd );
417     }
418 }
419 
420 static void test_sharelists(HDC winhdc)
421 {
422     HGLRC hglrc1, hglrc2, hglrc3;
423     BOOL res;
424 
425     hglrc1 = wglCreateContext(winhdc);
426     res = wglShareLists(0, 0);
427     ok(res == FALSE, "Sharing display lists for no contexts passed!\n");
428 
429     /* Test 1: Create a context and just share lists without doing anything special */
430     hglrc2 = wglCreateContext(winhdc);
431     if(hglrc2)
432     {
433         res = wglShareLists(hglrc1, hglrc2);
434         ok(res, "Sharing of display lists failed\n");
435         wglDeleteContext(hglrc2);
436     }
437 
438     /* Test 2: Share display lists with a 'destination' context which has been made current */
439     hglrc2 = wglCreateContext(winhdc);
440     if(hglrc2)
441     {
442         res = wglMakeCurrent(winhdc, hglrc2);
443         ok(res, "Make current failed\n");
444         res = wglShareLists(hglrc1, hglrc2);
445         todo_wine ok(res, "Sharing display lists with a destination context which has been made current failed\n");
446         wglMakeCurrent(0, 0);
447         wglDeleteContext(hglrc2);
448     }
449 
450     /* Test 3: Share display lists with a context which already shares display lists with another context.
451      * According to MSDN the second parameter cannot share any display lists but some buggy drivers might allow it */
452     hglrc3 = wglCreateContext(winhdc);
453     if(hglrc3)
454     {
455         res = wglShareLists(hglrc3, hglrc1);
456         ok(res == FALSE, "Sharing of display lists passed for a context which already shared lists before\n");
457         wglDeleteContext(hglrc3);
458     }
459 
460     /* Test 4: Share display lists with a 'source' context which has been made current */
461     hglrc2 = wglCreateContext(winhdc);
462     if(hglrc2)
463     {
464         res = wglMakeCurrent(winhdc, hglrc1);
465         ok(res, "Make current failed\n");
466         res = wglShareLists(hglrc1, hglrc2);
467         ok(res, "Sharing display lists with a source context which has been made current failed\n");
468         wglMakeCurrent(0, 0);
469         wglDeleteContext(hglrc2);
470     }
471 }
472 
473 static void test_makecurrent(HDC winhdc)
474 {
475     BOOL ret;
476     HGLRC hglrc;
477 
478     hglrc = wglCreateContext(winhdc);
479     ok( hglrc != 0, "wglCreateContext failed\n" );
480 
481     ret = wglMakeCurrent( winhdc, hglrc );
482     ok( ret, "wglMakeCurrent failed\n" );
483 
484     ok( wglGetCurrentContext() == hglrc, "wrong context\n" );
485 
486     /* set the same context again */
487     ret = wglMakeCurrent( winhdc, hglrc );
488     ok( ret, "wglMakeCurrent failed\n" );
489 
490     /* check wglMakeCurrent(x, y) after another call to wglMakeCurrent(x, y) */
491     ret = wglMakeCurrent( winhdc, NULL );
492     ok( ret, "wglMakeCurrent failed\n" );
493 
494     ret = wglMakeCurrent( winhdc, NULL );
495     ok( ret, "wglMakeCurrent failed\n" );
496 
497     SetLastError( 0xdeadbeef );
498     ret = wglMakeCurrent( NULL, NULL );
499     ok( !ret || broken(ret) /* nt4 */, "wglMakeCurrent succeeded\n" );
500     if (!ret) ok( GetLastError() == ERROR_INVALID_HANDLE,
501                   "Expected ERROR_INVALID_HANDLE, got error=%x\n", GetLastError() );
502 
503     ret = wglMakeCurrent( winhdc, NULL );
504     ok( ret, "wglMakeCurrent failed\n" );
505 
506     ret = wglMakeCurrent( winhdc, hglrc );
507     ok( ret, "wglMakeCurrent failed\n" );
508 
509     ret = wglMakeCurrent( NULL, NULL );
510     ok( ret, "wglMakeCurrent failed\n" );
511 
512     ok( wglGetCurrentContext() == NULL, "wrong context\n" );
513 
514     SetLastError( 0xdeadbeef );
515     ret = wglMakeCurrent( NULL, NULL );
516     ok( !ret || broken(ret) /* nt4 */, "wglMakeCurrent succeeded\n" );
517     if (!ret) ok( GetLastError() == ERROR_INVALID_HANDLE,
518                   "Expected ERROR_INVALID_HANDLE, got error=%x\n", GetLastError() );
519 
520     ret = wglMakeCurrent( winhdc, hglrc );
521     ok( ret, "wglMakeCurrent failed\n" );
522 }
523 
524 static void test_colorbits(HDC hdc)
525 {
526     const int iAttribList[] = { WGL_COLOR_BITS_ARB, WGL_RED_BITS_ARB, WGL_GREEN_BITS_ARB,
527                                 WGL_BLUE_BITS_ARB, WGL_ALPHA_BITS_ARB };
528     int iAttribRet[sizeof(iAttribList)/sizeof(iAttribList[0])];
529     const int iAttribs[] = { WGL_ALPHA_BITS_ARB, 1, 0 };
530     unsigned int nFormats;
531     BOOL res;
532     int iPixelFormat = 0;
533 
534     if (!pwglChoosePixelFormatARB)
535     {
536         win_skip("wglChoosePixelFormatARB is not available\n");
537         return;
538     }
539 
540     /* We need a pixel format with at least one bit of alpha */
541     res = pwglChoosePixelFormatARB(hdc, iAttribs, NULL, 1, &iPixelFormat, &nFormats);
542     if(res == FALSE || nFormats == 0)
543     {
544         skip("No suitable pixel formats found\n");
545         return;
546     }
547 
548     res = pwglGetPixelFormatAttribivARB(hdc, iPixelFormat, 0,
549               sizeof(iAttribList)/sizeof(iAttribList[0]), iAttribList, iAttribRet);
550     if(res == FALSE)
551     {
552         skip("wglGetPixelFormatAttribivARB failed\n");
553         return;
554     }
555     iAttribRet[1] += iAttribRet[2]+iAttribRet[3]+iAttribRet[4];
556     ok(iAttribRet[0] == iAttribRet[1], "WGL_COLOR_BITS_ARB (%d) does not equal R+G+B+A (%d)!\n",
557                                        iAttribRet[0], iAttribRet[1]);
558 }
559 
560 static void test_gdi_dbuf(HDC hdc)
561 {
562     const int iAttribList[] = { WGL_SUPPORT_GDI_ARB, WGL_DOUBLE_BUFFER_ARB };
563     int iAttribRet[sizeof(iAttribList)/sizeof(iAttribList[0])];
564     unsigned int nFormats;
565     int iPixelFormat;
566     BOOL res;
567 
568     if (!pwglGetPixelFormatAttribivARB)
569     {
570         win_skip("wglGetPixelFormatAttribivARB is not available\n");
571         return;
572     }
573 
574     nFormats = DescribePixelFormat(hdc, 0, 0, NULL);
575     for(iPixelFormat = 1;iPixelFormat <= nFormats;iPixelFormat++)
576     {
577         res = pwglGetPixelFormatAttribivARB(hdc, iPixelFormat, 0,
578                   sizeof(iAttribList)/sizeof(iAttribList[0]), iAttribList,
579                   iAttribRet);
580         ok(res!=FALSE, "wglGetPixelFormatAttribivARB failed for pixel format %d\n", iPixelFormat);
581         if(res == FALSE)
582             continue;
583 
584         ok(!(iAttribRet[0] && iAttribRet[1]), "GDI support and double buffering on pixel format %d\n", iPixelFormat);
585     }
586 }
587 
588 static void test_acceleration(HDC hdc)
589 {
590     const int iAttribList[] = { WGL_ACCELERATION_ARB };
591     int iAttribRet[sizeof(iAttribList)/sizeof(iAttribList[0])];
592     unsigned int nFormats;
593     int iPixelFormat;
594     int res;
595     PIXELFORMATDESCRIPTOR pfd;
596 
597     if (!pwglGetPixelFormatAttribivARB)
598     {
599         win_skip("wglGetPixelFormatAttribivARB is not available\n");
600         return;
601     }
602 
603     nFormats = DescribePixelFormat(hdc, 0, 0, NULL);
604     for(iPixelFormat = 1; iPixelFormat <= nFormats; iPixelFormat++)
605     {
606         res = pwglGetPixelFormatAttribivARB(hdc, iPixelFormat, 0,
607                   sizeof(iAttribList)/sizeof(iAttribList[0]), iAttribList,
608                   iAttribRet);
609         ok(res!=FALSE, "wglGetPixelFormatAttribivARB failed for pixel format %d\n", iPixelFormat);
610         if(res == FALSE)
611             continue;
612 
613         memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
614         DescribePixelFormat(hdc, iPixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
615 
616         switch(iAttribRet[0])
617         {
618             case WGL_NO_ACCELERATION_ARB:
619                 ok( (pfd.dwFlags & (PFD_GENERIC_FORMAT | PFD_GENERIC_ACCELERATED)) == PFD_GENERIC_FORMAT , "Expected only PFD_GENERIC_FORMAT to be set for WGL_NO_ACCELERATION_ARB!: iPixelFormat=%d, dwFlags=%x!\n", iPixelFormat, pfd.dwFlags);
620                 break;
621             case WGL_GENERIC_ACCELERATION_ARB:
622                 ok( (pfd.dwFlags & (PFD_GENERIC_FORMAT | PFD_GENERIC_ACCELERATED)) == (PFD_GENERIC_FORMAT | PFD_GENERIC_ACCELERATED), "Expected both PFD_GENERIC_FORMAT and PFD_GENERIC_ACCELERATION to be set for WGL_GENERIC_ACCELERATION_ARB: iPixelFormat=%d, dwFlags=%x!\n", iPixelFormat, pfd.dwFlags);
623                 break;
624             case WGL_FULL_ACCELERATION_ARB:
625                 ok( (pfd.dwFlags & (PFD_GENERIC_FORMAT | PFD_GENERIC_ACCELERATED)) == 0, "Expected no PFD_GENERIC_FORMAT/_ACCELERATION to be set for WGL_FULL_ACCELERATION_ARB: iPixelFormat=%d, dwFlags=%x!\n", iPixelFormat, pfd.dwFlags);
626                 break;
627         }
628     }
629 }
630 
631 static void test_bitmap_rendering( BOOL use_dib )
632 {
633     PIXELFORMATDESCRIPTOR pfd;
634     int i, ret, bpp, iPixelFormat=0;
635     unsigned int nFormats;
636     HGLRC hglrc, hglrc2;
637     BITMAPINFO biDst;
638     HBITMAP bmpDst, oldDst, bmp2;
639     HDC hdcDst, hdcScreen;
640     UINT *dstBuffer = NULL;
641 
642     hdcScreen = CreateCompatibleDC(0);
643     hdcDst = CreateCompatibleDC(0);
644 
645     if (use_dib)
646     {
647         bpp = 32;
648         memset(&biDst, 0, sizeof(BITMAPINFO));
649         biDst.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
650         biDst.bmiHeader.biWidth = 4;
651         biDst.bmiHeader.biHeight = -4;
652         biDst.bmiHeader.biPlanes = 1;
653         biDst.bmiHeader.biBitCount = 32;
654         biDst.bmiHeader.biCompression = BI_RGB;
655 
656         bmpDst = CreateDIBSection(0, &biDst, DIB_RGB_COLORS, (void**)&dstBuffer, NULL, 0);
657 
658         biDst.bmiHeader.biWidth = 12;
659         biDst.bmiHeader.biHeight = -12;
660         biDst.bmiHeader.biBitCount = 16;
661         bmp2 = CreateDIBSection(0, &biDst, DIB_RGB_COLORS, NULL, NULL, 0);
662     }
663     else
664     {
665         bpp = GetDeviceCaps( hdcScreen, BITSPIXEL );
666         bmpDst = CreateBitmap( 4, 4, 1, bpp, NULL );
667         bmp2 = CreateBitmap( 12, 12, 1, bpp, NULL );
668     }
669 
670     oldDst = SelectObject(hdcDst, bmpDst);
671 
672     trace( "testing on %s\n", use_dib ? "DIB" : "DDB" );
673 
674     /* Pick a pixel format by hand because ChoosePixelFormat is unreliable */
675     nFormats = DescribePixelFormat(hdcDst, 0, 0, NULL);
676     for(i=1; i<=nFormats; i++)
677     {
678         memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
679         DescribePixelFormat(hdcDst, i, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
680 
681         if((pfd.dwFlags & PFD_DRAW_TO_BITMAP) &&
682            (pfd.dwFlags & PFD_SUPPORT_OPENGL) &&
683            (pfd.cColorBits == bpp) &&
684            (pfd.cAlphaBits == 8) )
685         {
686             iPixelFormat = i;
687             break;
688         }
689     }
690 
691     if(!iPixelFormat)
692     {
693         skip("Unable to find a suitable pixel format\n");
694     }
695     else
696     {
697         ret = SetPixelFormat(hdcDst, iPixelFormat, &pfd);
698         ok( ret, "SetPixelFormat failed\n" );
699         ret = GetPixelFormat( hdcDst );
700         ok( ret == iPixelFormat, "GetPixelFormat returned %d/%d\n", ret, iPixelFormat );
701         ret = SetPixelFormat(hdcDst, iPixelFormat + 1, &pfd);
702         ok( !ret, "SetPixelFormat succeeded\n" );
703         hglrc = wglCreateContext(hdcDst);
704         ok(hglrc != NULL, "Unable to create a context\n");
705 
706         if(hglrc)
707         {
708             GLint viewport[4];
709             wglMakeCurrent(hdcDst, hglrc);
710             hglrc2 = wglCreateContext(hdcDst);
711             ok(hglrc2 != NULL, "Unable to create a context\n");
712 
713             /* Note this is RGBA but we read ARGB back */
714             glClearColor((float)0x22/0xff, (float)0x33/0xff, (float)0x44/0xff, (float)0x11/0xff);
715             glClear(GL_COLOR_BUFFER_BIT);
716             glGetIntegerv( GL_VIEWPORT, viewport );
717             glFinish();
718 
719             ok( viewport[0] == 0 && viewport[1] == 0 && viewport[2] == 4 && viewport[3] == 4,
720                 "wrong viewport %d,%d,%d,%d\n", viewport[0], viewport[1], viewport[2], viewport[3] );
721             /* Note apparently the alpha channel is not supported by the software renderer (bitmap only works using software) */
722             if (dstBuffer)
723                 for (i = 0; i < 16; i++)
724                     ok(dstBuffer[i] == 0x223344 || dstBuffer[i] == 0x11223344, "Received color=%x at %u\n",
725                        dstBuffer[i], i);
726 
727             SelectObject(hdcDst, bmp2);
728             ret = GetPixelFormat( hdcDst );
729             ok( ret == iPixelFormat, "GetPixelFormat returned %d/%d\n", ret, iPixelFormat );
730             ret = SetPixelFormat(hdcDst, iPixelFormat + 1, &pfd);
731             ok( !ret, "SetPixelFormat succeeded\n" );
732 
733             /* context still uses the old pixel format and viewport */
734             glClearColor((float)0x44/0xff, (float)0x33/0xff, (float)0x22/0xff, (float)0x11/0xff);
735             glClear(GL_COLOR_BUFFER_BIT);
736             glFinish();
737             glGetIntegerv( GL_VIEWPORT, viewport );
738             ok( viewport[0] == 0 && viewport[1] == 0 && viewport[2] == 4 && viewport[3] == 4,
739                 "wrong viewport %d,%d,%d,%d\n", viewport[0], viewport[1], viewport[2], viewport[3] );
740 
741             wglMakeCurrent(NULL, NULL);
742             wglMakeCurrent(hdcDst, hglrc);
743             glClearColor((float)0x44/0xff, (float)0x55/0xff, (float)0x66/0xff, (float)0x11/0xff);
744             glClear(GL_COLOR_BUFFER_BIT);
745             glFinish();
746             glGetIntegerv( GL_VIEWPORT, viewport );
747             ok( viewport[0] == 0 && viewport[1] == 0 && viewport[2] == 4 && viewport[3] == 4,
748                 "wrong viewport %d,%d,%d,%d\n", viewport[0], viewport[1], viewport[2], viewport[3] );
749 
750             wglMakeCurrent(hdcDst, hglrc2);
751             glGetIntegerv( GL_VIEWPORT, viewport );
752             ok( viewport[0] == 0 && viewport[1] == 0 && viewport[2] == 12 && viewport[3] == 12,
753                 "wrong viewport %d,%d,%d,%d\n", viewport[0], viewport[1], viewport[2], viewport[3] );
754 
755             wglMakeCurrent(hdcDst, hglrc);
756             glGetIntegerv( GL_VIEWPORT, viewport );
757             ok( viewport[0] == 0 && viewport[1] == 0 && viewport[2] == 4 && viewport[3] == 4,
758                 "wrong viewport %d,%d,%d,%d\n", viewport[0], viewport[1], viewport[2], viewport[3] );
759 
760             SelectObject(hdcDst, bmpDst);
761             ret = GetPixelFormat( hdcDst );
762             ok( ret == iPixelFormat, "GetPixelFormat returned %d/%d\n", ret, iPixelFormat );
763             ret = SetPixelFormat(hdcDst, iPixelFormat + 1, &pfd);
764             ok( !ret, "SetPixelFormat succeeded\n" );
765             wglMakeCurrent(hdcDst, hglrc2);
766             glGetIntegerv( GL_VIEWPORT, viewport );
767             ok( viewport[0] == 0 && viewport[1] == 0 && viewport[2] == 12 && viewport[3] == 12,
768                 "wrong viewport %d,%d,%d,%d\n", viewport[0], viewport[1], viewport[2], viewport[3] );
769 
770             wglDeleteContext(hglrc2);
771             wglDeleteContext(hglrc);
772         }
773     }
774 
775     SelectObject(hdcDst, oldDst);
776     DeleteObject(bmp2);
777     DeleteObject(bmpDst);
778     DeleteDC(hdcDst);
779     DeleteDC(hdcScreen);
780 }
781 
782 struct wgl_thread_param
783 {
784     HANDLE test_finished;
785     HWND hwnd;
786     HGLRC hglrc;
787     BOOL make_current;
788     BOOL make_current_error;
789     BOOL deleted;
790     DWORD deleted_error;
791 };
792 
793 static DWORD WINAPI wgl_thread(void *param)
794 {
795     struct wgl_thread_param *p = param;
796     HDC hdc = GetDC( p->hwnd );
797 
798     ok(!glGetString(GL_RENDERER) && !glGetString(GL_VERSION) && !glGetString(GL_VENDOR),
799        "Expected NULL string when no active context is set\n");
800 
801     SetLastError(0xdeadbeef);
802     p->make_current = wglMakeCurrent(hdc, p->hglrc);
803     p->make_current_error = GetLastError();
804     p->deleted = wglDeleteContext(p->hglrc);
805     p->deleted_error = GetLastError();
806     ReleaseDC( p->hwnd, hdc );
807     SetEvent(p->test_finished);
808     return 0;
809 }
810 
811 static void test_deletecontext(HWND hwnd, HDC hdc)
812 {
813     struct wgl_thread_param thread_params;
814     HGLRC hglrc = wglCreateContext(hdc);
815     HANDLE thread_handle;
816     BOOL res;
817     DWORD tid;
818 
819     SetLastError(0xdeadbeef);
820     res = wglDeleteContext(NULL);
821     ok(res == FALSE, "wglDeleteContext succeeded\n");
822     ok(GetLastError() == ERROR_INVALID_HANDLE, "Expected last error to be ERROR_INVALID_HANDLE, got %u\n", GetLastError());
823 
824     if(!hglrc)
825     {
826         skip("wglCreateContext failed!\n");
827         return;
828     }
829 
830     res = wglMakeCurrent(hdc, hglrc);
831     if(!res)
832     {
833         skip("wglMakeCurrent failed!\n");
834         return;
835     }
836 
837     /* WGL doesn't allow you to delete a context from a different thread than the one in which it is current.
838      * This differs from GLX which does allow it but it delays actual deletion until the context becomes not current.
839      */
840     thread_params.hglrc = hglrc;
841     thread_params.hwnd  = hwnd;
842     thread_params.test_finished = CreateEventW(NULL, FALSE, FALSE, NULL);
843     thread_handle = CreateThread(NULL, 0, wgl_thread, &thread_params, 0, &tid);
844     ok(!!thread_handle, "Failed to create thread, last error %#x.\n", GetLastError());
845     if(thread_handle)
846     {
847         WaitForSingleObject(thread_handle, INFINITE);
848         ok(!thread_params.make_current, "Attempt to make WGL context from another thread passed\n");
849         ok(thread_params.make_current_error == ERROR_BUSY, "Expected last error to be ERROR_BUSY, got %u\n", thread_params.make_current_error);
850         ok(!thread_params.deleted, "Attempt to delete WGL context from another thread passed\n");
851         ok(thread_params.deleted_error == ERROR_BUSY, "Expected last error to be ERROR_BUSY, got %u\n", thread_params.deleted_error);
852     }
853     CloseHandle(thread_params.test_finished);
854 
855     res = wglDeleteContext(hglrc);
856     ok(res == TRUE, "wglDeleteContext failed\n");
857 
858     /* Attempting to delete the same context twice should fail. */
859     SetLastError(0xdeadbeef);
860     res = wglDeleteContext(hglrc);
861     ok(res == FALSE, "wglDeleteContext succeeded\n");
862     ok(GetLastError() == ERROR_INVALID_HANDLE, "Expected last error to be ERROR_INVALID_HANDLE, got %u\n", GetLastError());
863 
864     /* WGL makes a context not current when deleting it. This differs from GLX behavior where
865      * deletion takes place when the thread becomes not current. */
866     hglrc = wglGetCurrentContext();
867     ok(hglrc == NULL, "A WGL context is active while none was expected\n");
868 }
869 
870 
871 static void test_getprocaddress(HDC hdc)
872 {
873     const char *extensions = (const char*)glGetString(GL_EXTENSIONS);
874     PROC func = NULL;
875     HGLRC ctx = wglGetCurrentContext();
876 
877     if (!extensions)
878     {
879         skip("skipping wglGetProcAddress tests because no GL extensions supported\n");
880         return;
881     }
882 
883     /* Core GL 1.0/1.1 functions should not be loadable through wglGetProcAddress.
884      * Try to load the function with and without a context.
885      */
886     func = wglGetProcAddress("glEnable");
887     ok(func == NULL, "Lookup of function glEnable with a context passed, expected a failure\n");
888     wglMakeCurrent(hdc, NULL);
889     func = wglGetProcAddress("glEnable");
890     ok(func == NULL, "Lookup of function glEnable without a context passed, expected a failure\n");
891     wglMakeCurrent(hdc, ctx);
892 
893     /* The goal of the test will be to test behavior of wglGetProcAddress when
894      * no WGL context is active. Before the test we pick an extension (GL_ARB_multitexture)
895      * which any GL >=1.2.1 implementation supports. Unfortunately the GDI renderer doesn't
896      * support it. There aren't any extensions we can use for this test which are supported by
897      * both GDI and real drivers.
898      * Note GDI only has GL_EXT_bgra, GL_EXT_paletted_texture and GL_WIN_swap_hint.
899      */
900     if (!gl_extension_supported(extensions, "GL_ARB_multitexture"))
901     {
902         skip("skipping test because lack of GL_ARB_multitexture support\n");
903         return;
904     }
905 
906     func = wglGetProcAddress("glActiveTextureARB");
907     ok(func != NULL, "Unable to lookup glActiveTextureARB, last error %#x\n", GetLastError());
908 
909     /* Temporarily disable the context, so we can see that we can't retrieve functions now. */
910     wglMakeCurrent(hdc, NULL);
911     func = wglGetProcAddress("glActiveTextureARB");
912     ok(func == NULL, "Function lookup without a context passed, expected a failure; last error %#x\n", GetLastError());
913     wglMakeCurrent(hdc, ctx);
914 }
915 
916 static void test_make_current_read(HDC hdc)
917 {
918     int res;
919     HDC hread;
920     HGLRC hglrc = wglCreateContext(hdc);
921 
922     if(!hglrc)
923     {
924         skip("wglCreateContext failed!\n");
925         return;
926     }
927 
928     res = wglMakeCurrent(hdc, hglrc);
929     if(!res)
930     {
931         skip("wglMakeCurrent failed!\n");
932         return;
933     }
934 
935     /* Test what wglGetCurrentReadDCARB does for wglMakeCurrent as the spec doesn't mention it */
936     hread = pwglGetCurrentReadDCARB();
937     trace("hread %p, hdc %p\n", hread, hdc);
938     ok(hread == hdc, "wglGetCurrentReadDCARB failed for standard wglMakeCurrent\n");
939 
940     pwglMakeContextCurrentARB(hdc, hdc, hglrc);
941     hread = pwglGetCurrentReadDCARB();
942     ok(hread == hdc, "wglGetCurrentReadDCARB failed for wglMakeContextCurrent\n");
943 }
944 
945 static void test_dc(HWND hwnd, HDC hdc)
946 {
947     int pf1, pf2;
948     HDC hdc2;
949 
950     /* Get another DC and make sure it has the same pixel format */
951     hdc2 = GetDC(hwnd);
952     if(hdc != hdc2)
953     {
954         pf1 = GetPixelFormat(hdc);
955         pf2 = GetPixelFormat(hdc2);
956         ok(pf1 == pf2, "Second DC does not have the same format (%d != %d)\n", pf1, pf2);
957     }
958     else
959         skip("Could not get a different DC for the window\n");
960 
961     if(hdc2)
962     {
963         ReleaseDC(hwnd, hdc2);
964         hdc2 = NULL;
965     }
966 }
967 
968 /* Nvidia converts win32 error codes to (0xc007 << 16) | win32_error_code */
969 #define NVIDIA_HRESULT_FROM_WIN32(x) (HRESULT_FROM_WIN32(x) | 0x40000000)
970 static void test_opengl3(HDC hdc)
971 {
972     /* Try to create a context compatible with OpenGL 1.x; 1.0-2.1 is allowed */
973     {
974         HGLRC gl3Ctx;
975         int attribs[] = {WGL_CONTEXT_MAJOR_VERSION_ARB, 1, 0};
976 
977         gl3Ctx = pwglCreateContextAttribsARB(hdc, 0, attribs);
978         ok(gl3Ctx != 0, "pwglCreateContextAttribsARB for a 1.x context failed!\n");
979         wglDeleteContext(gl3Ctx);
980     }
981 
982     /* Try to pass an invalid HDC */
983     {
984         HGLRC gl3Ctx;
985         DWORD error;
986         SetLastError(0xdeadbeef);
987         gl3Ctx = pwglCreateContextAttribsARB((HDC)0xdeadbeef, 0, 0);
988         ok(gl3Ctx == 0, "pwglCreateContextAttribsARB using an invalid HDC passed\n");
989         error = GetLastError();
990         ok(error == ERROR_DC_NOT_FOUND || error == ERROR_INVALID_HANDLE ||
991            broken(error == ERROR_DS_GENERIC_ERROR) ||
992            broken(error == NVIDIA_HRESULT_FROM_WIN32(ERROR_INVALID_DATA)), /* Nvidia Vista + Win7 */
993            "Expected ERROR_DC_NOT_FOUND, got error=%x\n", error);
994         wglDeleteContext(gl3Ctx);
995     }
996 
997     /* Try to pass an invalid shareList */
998     {
999         HGLRC gl3Ctx;
1000         DWORD error;
1001         SetLastError(0xdeadbeef);
1002         gl3Ctx = pwglCreateContextAttribsARB(hdc, (HGLRC)0xdeadbeef, 0);
1003         ok(gl3Ctx == 0, "pwglCreateContextAttribsARB using an invalid shareList passed\n");
1004         error = GetLastError();
1005         /* The Nvidia implementation seems to return hresults instead of win32 error codes */
1006         ok(error == ERROR_INVALID_OPERATION || error == ERROR_INVALID_DATA ||
1007            error == NVIDIA_HRESULT_FROM_WIN32(ERROR_INVALID_OPERATION), "Expected ERROR_INVALID_OPERATION, got error=%x\n", error);
1008         wglDeleteContext(gl3Ctx);
1009     }
1010 
1011     /* Try to create an OpenGL 3.0 context */
1012     {
1013         int attribs[] = {WGL_CONTEXT_MAJOR_VERSION_ARB, 3, WGL_CONTEXT_MINOR_VERSION_ARB, 0, 0};
1014         HGLRC gl3Ctx = pwglCreateContextAttribsARB(hdc, 0, attribs);
1015 
1016         if(gl3Ctx == NULL)
1017         {
1018             skip("Skipping the rest of the WGL_ARB_create_context test due to lack of OpenGL 3.0\n");
1019             return;
1020         }
1021 
1022         wglDeleteContext(gl3Ctx);
1023     }
1024 
1025     /* Test matching an OpenGL 3.0 context with an older one, OpenGL 3.0 should allow it until the new object model is introduced in a future revision */
1026     {
1027         HGLRC glCtx = wglCreateContext(hdc);
1028 
1029         int attribs[] = {WGL_CONTEXT_MAJOR_VERSION_ARB, 3, WGL_CONTEXT_MINOR_VERSION_ARB, 0, 0};
1030         int attribs_future[] = {WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB, WGL_CONTEXT_MAJOR_VERSION_ARB, 3, WGL_CONTEXT_MINOR_VERSION_ARB, 0, 0};
1031 
1032         HGLRC gl3Ctx = pwglCreateContextAttribsARB(hdc, glCtx, attribs);
1033         ok(gl3Ctx != NULL, "Sharing of a display list between OpenGL 3.0 and OpenGL 1.x/2.x failed!\n");
1034         if(gl3Ctx)
1035             wglDeleteContext(gl3Ctx);
1036 
1037         gl3Ctx = pwglCreateContextAttribsARB(hdc, glCtx, attribs_future);
1038         ok(gl3Ctx != NULL, "Sharing of a display list between a forward compatible OpenGL 3.0 context and OpenGL 1.x/2.x failed!\n");
1039         if(gl3Ctx)
1040             wglDeleteContext(gl3Ctx);
1041 
1042         if(glCtx)
1043             wglDeleteContext(glCtx);
1044     }
1045 
1046     /* Try to create an OpenGL 3.0 context and test windowless rendering */
1047     {
1048         HGLRC gl3Ctx;
1049         int attribs[] = {WGL_CONTEXT_MAJOR_VERSION_ARB, 3, WGL_CONTEXT_MINOR_VERSION_ARB, 0, 0};
1050         BOOL res;
1051 
1052         gl3Ctx = pwglCreateContextAttribsARB(hdc, 0, attribs);
1053         ok(gl3Ctx != 0, "pwglCreateContextAttribsARB for a 3.0 context failed!\n");
1054 
1055         /* OpenGL 3.0 allows offscreen rendering WITHOUT a drawable
1056          * Neither AMD or Nvidia support it at this point. The WGL_ARB_create_context specs also say that
1057          * it is hard because drivers use the HDC to enter the display driver and it sounds like they don't
1058          * expect drivers to ever offer it.
1059          */
1060         res = wglMakeCurrent(0, gl3Ctx);
1061         ok(res == FALSE, "Wow, OpenGL 3.0 windowless rendering passed while it was expected not to!\n");
1062         if(res)
1063             wglMakeCurrent(0, 0);
1064 
1065         if(gl3Ctx)
1066             wglDeleteContext(gl3Ctx);
1067     }
1068 }
1069 
1070 static void test_minimized(void)
1071 {
1072     PIXELFORMATDESCRIPTOR pf_desc =
1073     {
1074         sizeof(PIXELFORMATDESCRIPTOR),
1075         1,                     /* version */
1076         PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
1077         PFD_TYPE_RGBA,
1078         24,                    /* 24-bit color depth */
1079         0, 0, 0, 0, 0, 0,      /* color bits */
1080         0,                     /* alpha buffer */
1081         0,                     /* shift bit */
1082         0,                     /* accumulation buffer */
1083         0, 0, 0, 0,            /* accum bits */
1084         32,                    /* z-buffer */
1085         0,                     /* stencil buffer */
1086         0,                     /* auxiliary buffer */
1087         PFD_MAIN_PLANE,        /* main layer */
1088         0,                     /* reserved */
1089         0, 0, 0                /* layer masks */
1090     };
1091     int pixel_format;
1092     HWND window;
1093     LONG style;
1094     HGLRC ctx;
1095     BOOL ret;
1096     HDC dc;
1097 
1098     window = CreateWindowA("static", "opengl32_test",
1099             WS_POPUP | WS_MINIMIZE, 0, 0, 640, 480, 0, 0, 0, 0);
1100     ok(!!window, "Failed to create window, last error %#x.\n", GetLastError());
1101 
1102     dc = GetDC(window);
1103     ok(!!dc, "Failed to get DC.\n");
1104 
1105     pixel_format = ChoosePixelFormat(dc, &pf_desc);
1106     if (!pixel_format)
1107     {
1108         win_skip("Failed to find pixel format.\n");
1109         ReleaseDC(window, dc);
1110         DestroyWindow(window);
1111         return;
1112     }
1113 
1114     ret = SetPixelFormat(dc, pixel_format, &pf_desc);
1115     ok(ret, "Failed to set pixel format, last error %#x.\n", GetLastError());
1116 
1117     style = GetWindowLongA(window, GWL_STYLE);
1118     ok(style & WS_MINIMIZE, "Window should be minimized, got style %#x.\n", style);
1119 
1120     ctx = wglCreateContext(dc);
1121     ok(!!ctx, "Failed to create GL context, last error %#x.\n", GetLastError());
1122 
1123     ret = wglMakeCurrent(dc, ctx);
1124     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1125 
1126     style = GetWindowLongA(window, GWL_STYLE);
1127     ok(style & WS_MINIMIZE, "window should be minimized, got style %#x.\n", style);
1128 
1129     ret = wglMakeCurrent(NULL, NULL);
1130     ok(ret, "Failed to clear current context, last error %#x.\n", GetLastError());
1131 
1132     ret = wglDeleteContext(ctx);
1133     ok(ret, "Failed to delete GL context, last error %#x.\n", GetLastError());
1134 
1135     ReleaseDC(window, dc);
1136     DestroyWindow(window);
1137 }
1138 
1139 static void test_window_dc(void)
1140 {
1141     PIXELFORMATDESCRIPTOR pf_desc =
1142     {
1143         sizeof(PIXELFORMATDESCRIPTOR),
1144         1,                     /* version */
1145         PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
1146         PFD_TYPE_RGBA,
1147         24,                    /* 24-bit color depth */
1148         0, 0, 0, 0, 0, 0,      /* color bits */
1149         0,                     /* alpha buffer */
1150         0,                     /* shift bit */
1151         0,                     /* accumulation buffer */
1152         0, 0, 0, 0,            /* accum bits */
1153         32,                    /* z-buffer */
1154         0,                     /* stencil buffer */
1155         0,                     /* auxiliary buffer */
1156         PFD_MAIN_PLANE,        /* main layer */
1157         0,                     /* reserved */
1158         0, 0, 0                /* layer masks */
1159     };
1160     int pixel_format;
1161     HWND window;
1162     RECT vp, r;
1163     HGLRC ctx;
1164     BOOL ret;
1165     HDC dc;
1166 
1167     window = CreateWindowA("static", "opengl32_test",
1168             WS_OVERLAPPEDWINDOW, 0, 0, 640, 480, 0, 0, 0, 0);
1169     ok(!!window, "Failed to create window, last error %#x.\n", GetLastError());
1170 
1171     ShowWindow(window, SW_SHOW);
1172 
1173     dc = GetWindowDC(window);
1174     ok(!!dc, "Failed to get DC.\n");
1175 
1176     pixel_format = ChoosePixelFormat(dc, &pf_desc);
1177     if (!pixel_format)
1178     {
1179         win_skip("Failed to find pixel format.\n");
1180         ReleaseDC(window, dc);
1181         DestroyWindow(window);
1182         return;
1183     }
1184 
1185     ret = SetPixelFormat(dc, pixel_format, &pf_desc);
1186     ok(ret, "Failed to set pixel format, last error %#x.\n", GetLastError());
1187 
1188     ctx = wglCreateContext(dc);
1189     ok(!!ctx, "Failed to create GL context, last error %#x.\n", GetLastError());
1190 
1191     ret = wglMakeCurrent(dc, ctx);
1192     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1193 
1194     GetClientRect(window, &r);
1195     glGetIntegerv(GL_VIEWPORT, (GLint *)&vp);
1196     ok(EqualRect(&r, &vp), "Viewport not equal to client rect.\n");
1197 
1198     ret = wglMakeCurrent(NULL, NULL);
1199     ok(ret, "Failed to clear current context, last error %#x.\n", GetLastError());
1200 
1201     ret = wglDeleteContext(ctx);
1202     ok(ret, "Failed to delete GL context, last error %#x.\n", GetLastError());
1203 
1204     ReleaseDC(window, dc);
1205     DestroyWindow(window);
1206 }
1207 
1208 static void test_message_window(void)
1209 {
1210     PIXELFORMATDESCRIPTOR pf_desc =
1211     {
1212         sizeof(PIXELFORMATDESCRIPTOR),
1213         1,                     /* version */
1214         PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
1215         PFD_TYPE_RGBA,
1216         24,                    /* 24-bit color depth */
1217         0, 0, 0, 0, 0, 0,      /* color bits */
1218         0,                     /* alpha buffer */
1219         0,                     /* shift bit */
1220         0,                     /* accumulation buffer */
1221         0, 0, 0, 0,            /* accum bits */
1222         32,                    /* z-buffer */
1223         0,                     /* stencil buffer */
1224         0,                     /* auxiliary buffer */
1225         PFD_MAIN_PLANE,        /* main layer */
1226         0,                     /* reserved */
1227         0, 0, 0                /* layer masks */
1228     };
1229     int pixel_format;
1230     HWND window;
1231     RECT vp, r;
1232     HGLRC ctx;
1233     BOOL ret;
1234     HDC dc;
1235     GLenum glerr;
1236 
1237     window = CreateWindowA("static", "opengl32_test",
1238                            WS_OVERLAPPEDWINDOW, 0, 0, 100, 100, HWND_MESSAGE, 0, 0, 0);
1239     if (!window)
1240     {
1241         win_skip( "HWND_MESSAGE not supported\n" );
1242         return;
1243     }
1244     dc = GetDC(window);
1245     ok(!!dc, "Failed to get DC.\n");
1246 
1247     pixel_format = ChoosePixelFormat(dc, &pf_desc);
1248     if (!pixel_format)
1249     {
1250         win_skip("Failed to find pixel format.\n");
1251         ReleaseDC(window, dc);
1252         DestroyWindow(window);
1253         return;
1254     }
1255 
1256     ret = SetPixelFormat(dc, pixel_format, &pf_desc);
1257     ok(ret, "Failed to set pixel format, last error %#x.\n", GetLastError());
1258 
1259     ctx = wglCreateContext(dc);
1260     ok(!!ctx, "Failed to create GL context, last error %#x.\n", GetLastError());
1261 
1262     ret = wglMakeCurrent(dc, ctx);
1263     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1264 
1265     GetClientRect(window, &r);
1266     glGetIntegerv(GL_VIEWPORT, (GLint *)&vp);
1267     ok(EqualRect(&r, &vp), "Viewport not equal to client rect.\n");
1268 
1269     glClear(GL_COLOR_BUFFER_BIT);
1270     glFinish();
1271     glerr = glGetError();
1272     ok(glerr == GL_NO_ERROR, "Failed glClear, error %#x.\n", glerr);
1273     ret = SwapBuffers(dc);
1274     ok(ret, "Failed SwapBuffers, error %#x.\n", GetLastError());
1275 
1276     ret = wglMakeCurrent(NULL, NULL);
1277     ok(ret, "Failed to clear current context, last error %#x.\n", GetLastError());
1278 
1279     ret = wglDeleteContext(ctx);
1280     ok(ret, "Failed to delete GL context, last error %#x.\n", GetLastError());
1281 
1282     ReleaseDC(window, dc);
1283     DestroyWindow(window);
1284 }
1285 
1286 static void test_destroy(HDC oldhdc)
1287 {
1288     PIXELFORMATDESCRIPTOR pf_desc =
1289     {
1290         sizeof(PIXELFORMATDESCRIPTOR),
1291         1,                     /* version */
1292         PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
1293         PFD_TYPE_RGBA,
1294         24,                    /* 24-bit color depth */
1295         0, 0, 0, 0, 0, 0,      /* color bits */
1296         0,                     /* alpha buffer */
1297         0,                     /* shift bit */
1298         0,                     /* accumulation buffer */
1299         0, 0, 0, 0,            /* accum bits */
1300         32,                    /* z-buffer */
1301         0,                     /* stencil buffer */
1302         0,                     /* auxiliary buffer */
1303         PFD_MAIN_PLANE,        /* main layer */
1304         0,                     /* reserved */
1305         0, 0, 0                /* layer masks */
1306     };
1307     int pixel_format;
1308     HWND window;
1309     HGLRC ctx;
1310     BOOL ret;
1311     HDC dc;
1312     GLenum glerr;
1313     DWORD err;
1314     HGLRC oldctx = wglGetCurrentContext();
1315 
1316     ok(!!oldctx, "Expected to find a valid current context.\n");
1317 
1318     window = CreateWindowA("static", "opengl32_test",
1319             WS_POPUP, 0, 0, 640, 480, 0, 0, 0, 0);
1320     ok(!!window, "Failed to create window, last error %#x.\n", GetLastError());
1321 
1322     dc = GetDC(window);
1323     ok(!!dc, "Failed to get DC.\n");
1324 
1325     pixel_format = ChoosePixelFormat(dc, &pf_desc);
1326     if (!pixel_format)
1327     {
1328         win_skip("Failed to find pixel format.\n");
1329         ReleaseDC(window, dc);
1330         DestroyWindow(window);
1331         return;
1332     }
1333 
1334     ret = SetPixelFormat(dc, pixel_format, &pf_desc);
1335     ok(ret, "Failed to set pixel format, last error %#x.\n", GetLastError());
1336 
1337     ctx = wglCreateContext(dc);
1338     ok(!!ctx, "Failed to create GL context, last error %#x.\n", GetLastError());
1339 
1340     ret = wglMakeCurrent(dc, ctx);
1341     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1342 
1343     glClear(GL_COLOR_BUFFER_BIT);
1344     glFinish();
1345     glerr = glGetError();
1346     ok(glerr == GL_NO_ERROR, "Failed glClear, error %#x.\n", glerr);
1347     ret = SwapBuffers(dc);
1348     ok(ret, "Failed SwapBuffers, error %#x.\n", GetLastError());
1349 
1350     ret = DestroyWindow(window);
1351     ok(ret, "Failed to destroy window, last error %#x.\n", GetLastError());
1352 
1353     ok(wglGetCurrentContext() == ctx, "Wrong current context.\n");
1354 
1355     SetLastError(0xdeadbeef);
1356     ret = wglMakeCurrent(dc, ctx);
1357     err = GetLastError();
1358     ok(!ret && err == ERROR_INVALID_HANDLE,
1359             "Unexpected behavior when making context current, ret %d, last error %#x.\n", ret, err);
1360     SetLastError(0xdeadbeef);
1361     ret = SwapBuffers(dc);
1362     err = GetLastError();
1363     ok(!ret && err == ERROR_INVALID_HANDLE, "Unexpected behavior with SwapBuffer, last error %#x.\n", err);
1364 
1365     ok(wglGetCurrentContext() == ctx, "Wrong current context.\n");
1366 
1367     glClear(GL_COLOR_BUFFER_BIT);
1368     glFinish();
1369     glerr = glGetError();
1370     ok(glerr == GL_NO_ERROR, "Failed glClear, error %#x.\n", glerr);
1371     SetLastError(0xdeadbeef);
1372     ret = SwapBuffers(dc);
1373     err = GetLastError();
1374     ok(!ret && err == ERROR_INVALID_HANDLE, "Unexpected behavior with SwapBuffer, last error %#x.\n", err);
1375 
1376     ret = wglMakeCurrent(NULL, NULL);
1377     ok(ret, "Failed to clear current context, last error %#x.\n", GetLastError());
1378 
1379     glClear(GL_COLOR_BUFFER_BIT);
1380     glFinish();
1381     glerr = glGetError();
1382     ok(glerr == GL_INVALID_OPERATION, "Failed glClear, error %#x.\n", glerr);
1383     SetLastError(0xdeadbeef);
1384     ret = SwapBuffers(dc);
1385     err = GetLastError();
1386     ok(!ret && err == ERROR_INVALID_HANDLE, "Unexpected behavior with SwapBuffer, last error %#x.\n", err);
1387 
1388     SetLastError(0xdeadbeef);
1389     ret = wglMakeCurrent(dc, ctx);
1390     err = GetLastError();
1391     ok(!ret && err == ERROR_INVALID_HANDLE,
1392             "Unexpected behavior when making context current, ret %d, last error %#x.\n", ret, err);
1393 
1394     ok(wglGetCurrentContext() == NULL, "Wrong current context.\n");
1395 
1396     ret = wglMakeCurrent(oldhdc, oldctx);
1397     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1398     ok(wglGetCurrentContext() == oldctx, "Wrong current context.\n");
1399 
1400     SetLastError(0xdeadbeef);
1401     ret = wglMakeCurrent(dc, ctx);
1402     err = GetLastError();
1403     ok(!ret && err == ERROR_INVALID_HANDLE,
1404             "Unexpected behavior when making context current, ret %d, last error %#x.\n", ret, err);
1405 
1406     ok(wglGetCurrentContext() == oldctx, "Wrong current context.\n");
1407 
1408     ret = wglDeleteContext(ctx);
1409     ok(ret, "Failed to delete GL context, last error %#x.\n", GetLastError());
1410 
1411     ReleaseDC(window, dc);
1412 
1413     ret = wglMakeCurrent(oldhdc, oldctx);
1414     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1415 }
1416 
1417 static void test_destroy_read(HDC oldhdc)
1418 {
1419     PIXELFORMATDESCRIPTOR pf_desc =
1420     {
1421         sizeof(PIXELFORMATDESCRIPTOR),
1422         1,                     /* version */
1423         PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
1424         PFD_TYPE_RGBA,
1425         24,                    /* 24-bit color depth */
1426         0, 0, 0, 0, 0, 0,      /* color bits */
1427         0,                     /* alpha buffer */
1428         0,                     /* shift bit */
1429         0,                     /* accumulation buffer */
1430         0, 0, 0, 0,            /* accum bits */
1431         32,                    /* z-buffer */
1432         0,                     /* stencil buffer */
1433         0,                     /* auxiliary buffer */
1434         PFD_MAIN_PLANE,        /* main layer */
1435         0,                     /* reserved */
1436         0, 0, 0                /* layer masks */
1437     };
1438     int pixel_format;
1439     HWND draw_window, read_window;
1440     HGLRC ctx;
1441     BOOL ret;
1442     HDC read_dc, draw_dc;
1443     GLenum glerr;
1444     DWORD err;
1445     HGLRC oldctx = wglGetCurrentContext();
1446 
1447     ok(!!oldctx, "Expected to find a valid current context\n");
1448 
1449     draw_window = CreateWindowA("static", "opengl32_test",
1450             WS_POPUP, 0, 0, 640, 480, 0, 0, 0, 0);
1451     ok(!!draw_window, "Failed to create window, last error %#x.\n", GetLastError());
1452 
1453     draw_dc = GetDC(draw_window);
1454     ok(!!draw_dc, "Failed to get DC.\n");
1455 
1456     pixel_format = ChoosePixelFormat(draw_dc, &pf_desc);
1457     if (!pixel_format)
1458     {
1459         win_skip("Failed to find pixel format.\n");
1460         ReleaseDC(draw_window, draw_dc);
1461         DestroyWindow(draw_window);
1462         return;
1463     }
1464 
1465     ret = SetPixelFormat(draw_dc, pixel_format, &pf_desc);
1466     ok(ret, "Failed to set pixel format, last error %#x.\n", GetLastError());
1467 
1468     read_window = CreateWindowA("static", "opengl32_test",
1469             WS_POPUP, 0, 0, 640, 480, 0, 0, 0, 0);
1470     ok(!!read_window, "Failed to create window, last error %#x.\n", GetLastError());
1471 
1472     read_dc = GetDC(read_window);
1473     ok(!!draw_dc, "Failed to get DC.\n");
1474 
1475     pixel_format = ChoosePixelFormat(read_dc, &pf_desc);
1476     if (!pixel_format)
1477     {
1478         win_skip("Failed to find pixel format.\n");
1479         ReleaseDC(read_window, read_dc);
1480         DestroyWindow(read_window);
1481         ReleaseDC(draw_window, draw_dc);
1482         DestroyWindow(draw_window);
1483         return;
1484     }
1485 
1486     ret = SetPixelFormat(read_dc, pixel_format, &pf_desc);
1487     ok(ret, "Failed to set pixel format, last error %#x.\n", GetLastError());
1488 
1489     ctx = wglCreateContext(draw_dc);
1490     ok(!!ctx, "Failed to create GL context, last error %#x.\n", GetLastError());
1491 
1492     ret = pwglMakeContextCurrentARB(draw_dc, read_dc, ctx);
1493     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1494 
1495     glCopyPixels(0, 0, 640, 480, GL_COLOR);
1496     glFinish();
1497     glerr = glGetError();
1498     ok(glerr == GL_NO_ERROR, "Failed glCopyPixel, error %#x.\n", glerr);
1499     ret = SwapBuffers(draw_dc);
1500     ok(ret, "Failed SwapBuffers, error %#x.\n", GetLastError());
1501 
1502     ret = DestroyWindow(read_window);
1503     ok(ret, "Failed to destroy window, last error %#x.\n", GetLastError());
1504 
1505     ok(wglGetCurrentContext() == ctx, "Wrong current context.\n");
1506 
1507     if (0) /* Crashes on AMD on Windows */
1508     {
1509         glCopyPixels(0, 0, 640, 480, GL_COLOR);
1510         glFinish();
1511         glerr = glGetError();
1512         ok(glerr == GL_NO_ERROR, "Failed glCopyPixel, error %#x.\n", glerr);
1513     }
1514 
1515     glClear(GL_COLOR_BUFFER_BIT);
1516     glFinish();
1517     glerr = glGetError();
1518     ok(glerr == GL_NO_ERROR, "Failed glClear, error %#x.\n", glerr);
1519     ret = SwapBuffers(draw_dc);
1520     ok(ret, "Failed SwapBuffers, error %#x.\n", GetLastError());
1521 
1522     ret = wglMakeCurrent(NULL, NULL);
1523     ok(ret, "Failed to clear current context, last error %#x.\n", GetLastError());
1524 
1525     if (0) /* This crashes with Nvidia drivers on Windows. */
1526     {
1527         SetLastError(0xdeadbeef);
1528         ret = pwglMakeContextCurrentARB(draw_dc, read_dc, ctx);
1529         err = GetLastError();
1530         ok(!ret && err == ERROR_INVALID_HANDLE,
1531                 "Unexpected behavior when making context current, ret %d, last error %#x.\n", ret, err);
1532     }
1533 
1534     ret = DestroyWindow(draw_window);
1535     ok(ret, "Failed to destroy window, last error %#x.\n", GetLastError());
1536 
1537     glClear(GL_COLOR_BUFFER_BIT);
1538     glFinish();
1539     glerr = glGetError();
1540     ok(glerr == GL_INVALID_OPERATION, "Failed glClear, error %#x.\n", glerr);
1541     SetLastError(0xdeadbeef);
1542     ret = SwapBuffers(draw_dc);
1543     err = GetLastError();
1544     ok(!ret && err == ERROR_INVALID_HANDLE, "Unexpected behavior with SwapBuffer, last error %#x.\n", err);
1545 
1546     SetLastError(0xdeadbeef);
1547     ret = pwglMakeContextCurrentARB(draw_dc, read_dc, ctx);
1548     err = GetLastError();
1549     ok(!ret && (err == ERROR_INVALID_HANDLE || err == 0xc0070006),
1550             "Unexpected behavior when making context current, ret %d, last error %#x.\n", ret, err);
1551 
1552     ok(wglGetCurrentContext() == NULL, "Wrong current context.\n");
1553 
1554     wglMakeCurrent(NULL, NULL);
1555 
1556     wglMakeCurrent(oldhdc, oldctx);
1557     ok(wglGetCurrentContext() == oldctx, "Wrong current context.\n");
1558 
1559     SetLastError(0xdeadbeef);
1560     ret = pwglMakeContextCurrentARB(draw_dc, read_dc, ctx);
1561     err = GetLastError();
1562     ok(!ret && (err == ERROR_INVALID_HANDLE || err == 0xc0070006),
1563             "Unexpected behavior when making context current, last error %#x.\n", err);
1564 
1565     ok(wglGetCurrentContext() == oldctx, "Wrong current context.\n");
1566 
1567     ret = wglDeleteContext(ctx);
1568     ok(ret, "Failed to delete GL context, last error %#x.\n", GetLastError());
1569 
1570     ReleaseDC(read_window, read_dc);
1571     ReleaseDC(draw_window, draw_dc);
1572 
1573     wglMakeCurrent(oldhdc, oldctx);
1574 }
1575 
1576 static void test_swap_control(HDC oldhdc)
1577 {
1578     PIXELFORMATDESCRIPTOR pf_desc =
1579     {
1580         sizeof(PIXELFORMATDESCRIPTOR),
1581         1,                     /* version */
1582         PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
1583         PFD_TYPE_RGBA,
1584         24,                    /* 24-bit color depth */
1585         0, 0, 0, 0, 0, 0,      /* color bits */
1586         0,                     /* alpha buffer */
1587         0,                     /* shift bit */
1588         0,                     /* accumulation buffer */
1589         0, 0, 0, 0,            /* accum bits */
1590         32,                    /* z-buffer */
1591         0,                     /* stencil buffer */
1592         0,                     /* auxiliary buffer */
1593         PFD_MAIN_PLANE,        /* main layer */
1594         0,                     /* reserved */
1595         0, 0, 0                /* layer masks */
1596     };
1597     int pixel_format;
1598     HWND window1, window2, old_parent;
1599     HGLRC ctx1, ctx2, oldctx;
1600     BOOL ret;
1601     HDC dc1, dc2;
1602     int interval;
1603 
1604     oldctx = wglGetCurrentContext();
1605     ok(!!oldctx, "Expected to find a valid current context.\n");
1606 
1607     window1 = CreateWindowA("static", "opengl32_test",
1608             WS_POPUP, 0, 0, 640, 480, 0, 0, 0, 0);
1609     ok(!!window1, "Failed to create window1, last error %#x.\n", GetLastError());
1610 
1611     dc1 = GetDC(window1);
1612     ok(!!dc1, "Failed to get DC.\n");
1613 
1614     pixel_format = ChoosePixelFormat(dc1, &pf_desc);
1615     if (!pixel_format)
1616     {
1617         win_skip("Failed to find pixel format.\n");
1618         ReleaseDC(window1, dc1);
1619         DestroyWindow(window1);
1620         return;
1621     }
1622 
1623     ret = SetPixelFormat(dc1, pixel_format, &pf_desc);
1624     ok(ret, "Failed to set pixel format, last error %#x.\n", GetLastError());
1625 
1626     ctx1 = wglCreateContext(dc1);
1627     ok(!!ctx1, "Failed to create GL context, last error %#x.\n", GetLastError());
1628 
1629     ret = wglMakeCurrent(dc1, ctx1);
1630     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1631 
1632     interval = pwglGetSwapIntervalEXT();
1633     ok(interval == 1, "Expected default swap interval 1, got %d\n", interval);
1634 
1635     ret = pwglSwapIntervalEXT(0);
1636     ok(ret, "Failed to set swap interval to 0, last error %#x.\n", GetLastError());
1637 
1638     interval = pwglGetSwapIntervalEXT();
1639     ok(interval == 0, "Expected swap interval 0, got %d\n", interval);
1640 
1641     /* Check what interval we get on a second context on the same drawable.*/
1642     ctx2 = wglCreateContext(dc1);
1643     ok(!!ctx2, "Failed to create GL context, last error %#x.\n", GetLastError());
1644 
1645     ret = wglMakeCurrent(dc1, ctx2);
1646     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1647 
1648     interval = pwglGetSwapIntervalEXT();
1649     ok(interval == 0, "Expected swap interval 0, got %d\n", interval);
1650 
1651     /* A second window is created to see whether its swap interval was affected
1652      * by previous calls.
1653      */
1654     window2 = CreateWindowA("static", "opengl32_test",
1655             WS_POPUP, 0, 0, 640, 480, 0, 0, 0, 0);
1656     ok(!!window2, "Failed to create window2, last error %#x.\n", GetLastError());
1657 
1658     dc2 = GetDC(window2);
1659     ok(!!dc2, "Failed to get DC.\n");
1660 
1661     ret = SetPixelFormat(dc2, pixel_format, &pf_desc);
1662     ok(ret, "Failed to set pixel format, last error %#x.\n", GetLastError());
1663 
1664     ret = wglMakeCurrent(dc2, ctx1);
1665     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1666 
1667     /* Since the second window lacks the swap interval, this proves that the interval
1668      * is not global or shared among contexts.
1669      */
1670     interval = pwglGetSwapIntervalEXT();
1671     ok(interval == 1, "Expected default swap interval 1, got %d\n", interval);
1672 
1673     /* Test if setting the parent of a window resets the swap interval. */
1674     ret = wglMakeCurrent(dc1, ctx1);
1675     ok(ret, "Failed to make context current, last error %#x.\n", GetLastError());
1676 
1677     old_parent = SetParent(window1, window2);
1678     ok(!!old_parent, "Failed to make window1 a child of window2, last error %#x.\n", GetLastError());
1679 
1680     interval = pwglGetSwapIntervalEXT();
1681     ok(interval == 0, "Expected swap interval 0, got %d\n", interval);
1682 
1683     ret = wglDeleteContext(ctx1);
1684     ok(ret, "Failed to delete GL context, last error %#x.\n", GetLastError());
1685     ret = wglDeleteContext(ctx2);
1686     ok(ret, "Failed to delete GL context, last error %#x.\n", GetLastError());
1687 
1688     ReleaseDC(window1, dc1);
1689     DestroyWindow(window1);
1690     ReleaseDC(window2, dc2);
1691     DestroyWindow(window2);
1692 
1693     wglMakeCurrent(oldhdc, oldctx);
1694 }
1695 
1696 START_TEST(opengl)
1697 {
1698     HWND hwnd;
1699     PIXELFORMATDESCRIPTOR pfd = {
1700         sizeof(PIXELFORMATDESCRIPTOR),
1701         1,                     /* version */
1702         PFD_DRAW_TO_WINDOW |
1703         PFD_SUPPORT_OPENGL |
1704         PFD_DOUBLEBUFFER,
1705         PFD_TYPE_RGBA,
1706         24,                    /* 24-bit color depth */
1707         0, 0, 0, 0, 0, 0,      /* color bits */
1708         0,                     /* alpha buffer */
1709         0,                     /* shift bit */
1710         0,                     /* accumulation buffer */
1711         0, 0, 0, 0,            /* accum bits */
1712         32,                    /* z-buffer */
1713         0,                     /* stencil buffer */
1714         0,                     /* auxiliary buffer */
1715         PFD_MAIN_PLANE,        /* main layer */
1716         0,                     /* reserved */
1717         0, 0, 0                /* layer masks */
1718     };
1719 
1720     hwnd = CreateWindowA("static", "Title", WS_OVERLAPPEDWINDOW, 10, 10, 200, 200, NULL, NULL,
1721             NULL, NULL);
1722     ok(hwnd != NULL, "err: %d\n", GetLastError());
1723     if (hwnd)
1724     {
1725         HDC hdc;
1726         int iPixelFormat, res;
1727         HGLRC hglrc;
1728         DWORD error;
1729         ShowWindow(hwnd, SW_SHOW);
1730 
1731         hdc = GetDC(hwnd);
1732 
1733         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
1734         if(iPixelFormat == 0)
1735         {
1736             /* This should never happen as ChoosePixelFormat always returns a closest match, but currently this fails in Wine if we don't have glX */
1737             win_skip("Unable to find pixel format.\n");
1738             goto cleanup;
1739         }
1740 
1741         /* We shouldn't be able to create a context from a hdc which doesn't have a pixel format set */
1742         hglrc = wglCreateContext(hdc);
1743         ok(hglrc == NULL, "wglCreateContext should fail when no pixel format has been set, but it passed\n");
1744         error = GetLastError();
1745         ok(error == ERROR_INVALID_PIXEL_FORMAT, "expected ERROR_INVALID_PIXEL_FORMAT for wglCreateContext without a pixelformat set, but received %#x\n", error);
1746 
1747         res = SetPixelFormat(hdc, iPixelFormat, &pfd);
1748         ok(res, "SetPixelformat failed: %x\n", GetLastError());
1749 
1750         test_bitmap_rendering( TRUE );
1751         test_bitmap_rendering( FALSE );
1752         test_minimized();
1753         test_window_dc();
1754         test_message_window();
1755         test_dc(hwnd, hdc);
1756 
1757         ok(!glGetString(GL_RENDERER) && !glGetString(GL_VERSION) && !glGetString(GL_VENDOR),
1758            "Expected NULL string when no active context is set\n");
1759         hglrc = wglCreateContext(hdc);
1760         res = wglMakeCurrent(hdc, hglrc);
1761         ok(res, "wglMakeCurrent failed!\n");
1762         if(res)
1763         {
1764             trace("OpenGL renderer: %s\n", glGetString(GL_RENDERER));
1765             trace("OpenGL driver version: %s\n", glGetString(GL_VERSION));
1766             trace("OpenGL vendor: %s\n", glGetString(GL_VENDOR));
1767         }
1768         else
1769         {
1770             skip("Skipping OpenGL tests without a current context\n");
1771             return;
1772         }
1773 
1774         /* Initialisation of WGL functions depends on an implicit WGL context. For this reason we can't load them before making
1775          * any WGL call :( On Wine this would work but not on real Windows because there can be different implementations (software, ICD, MCD).
1776          */
1777         init_functions();
1778         test_getprocaddress(hdc);
1779         test_deletecontext(hwnd, hdc);
1780         test_makecurrent(hdc);
1781 
1782         /* The lack of wglGetExtensionsStringARB in general means broken software rendering or the lack of decent OpenGL support, skip tests in such cases */
1783         if (!pwglGetExtensionsStringARB)
1784         {
1785             win_skip("wglGetExtensionsStringARB is not available\n");
1786             return;
1787         }
1788 
1789         test_choosepixelformat();
1790         test_setpixelformat(hdc);
1791         test_destroy(hdc);
1792         test_sharelists(hdc);
1793         test_colorbits(hdc);
1794         test_gdi_dbuf(hdc);
1795         test_acceleration(hdc);
1796 
1797         wgl_extensions = pwglGetExtensionsStringARB(hdc);
1798         if(wgl_extensions == NULL) skip("Skipping opengl32 tests because this OpenGL implementation doesn't support WGL extensions!\n");
1799 
1800         if(strstr(wgl_extensions, "WGL_ARB_create_context"))
1801             test_opengl3(hdc);
1802 
1803         if(strstr(wgl_extensions, "WGL_ARB_make_current_read"))
1804         {
1805             test_make_current_read(hdc);
1806             test_destroy_read(hdc);
1807         }
1808         else
1809             skip("WGL_ARB_make_current_read not supported, skipping test\n");
1810 
1811         if(strstr(wgl_extensions, "WGL_ARB_pbuffer"))
1812             test_pbuffers(hdc);
1813         else
1814             skip("WGL_ARB_pbuffer not supported, skipping pbuffer test\n");
1815 
1816         if(strstr(wgl_extensions, "WGL_EXT_swap_control"))
1817             test_swap_control(hdc);
1818         else
1819             skip("WGL_EXT_swap_control not supported, skipping test\n");
1820 
1821 cleanup:
1822         ReleaseDC(hwnd, hdc);
1823         DestroyWindow(hwnd);
1824     }
1825 }
1826