dlls/opengl32/tests/opengl.c

   1 /*
   2  * Some tests for OpenGL functions
   3  *
   4  * Copyright (C) 2007 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
  25 #define MAX_FORMATS 256
  26 typedef void* HPBUFFERARB;
  27
  28 /* WGL_ARB_extensions_string */
  29 static const char* (WINAPI *pwglGetExtensionsStringARB)(HDC);
  30 static int (WINAPI *pwglReleasePbufferDCARB)(HPBUFFERARB, HDC);
  31
  32 /* WGL_ARB_pixel_format */
  33 #define WGL_COLOR_BITS_ARB 0x2014
  34 #define WGL_RED_BITS_ARB   0x2015
  35 #define WGL_GREEN_BITS_ARB 0x2017
  36 #define WGL_BLUE_BITS_ARB  0x2019
  37 #define WGL_ALPHA_BITS_ARB 0x201B
  38 #define WGL_SUPPORT_GDI_ARB   0x200F
  39 #define WGL_DOUBLE_BUFFER_ARB 0x2011
  40
  41 static BOOL (WINAPI *pwglChoosePixelFormatARB)(HDC, const int *, const FLOAT *, UINT, int *, UINT *);
  42 static BOOL (WINAPI *pwglGetPixelFormatAttribivARB)(HDC, int, int, UINT, const int *, int *);
  43
  44 /* WGL_ARB_pbuffer */
  45 #define WGL_DRAW_TO_PBUFFER_ARB 0x202D
  46 static HPBUFFERARB* (WINAPI *pwglCreatePbufferARB)(HDC, int, int, int, const int *);
  47 static HDC (WINAPI *pwglGetPbufferDCARB)(HPBUFFERARB);
  48
  49 static const char* wgl_extensions = NULL;
  50
  51 static void init_functions(void)
  52 {
  53     /* WGL_ARB_extensions_string */
  54     pwglGetExtensionsStringARB = (void*)wglGetProcAddress("wglGetExtensionsStringARB");
  55
  56     /* WGL_ARB_pixel_format */
  57     pwglChoosePixelFormatARB = (void*)wglGetProcAddress("wglChoosePixelFormatARB");
  58     pwglGetPixelFormatAttribivARB = (void*)wglGetProcAddress("wglGetPixelFormatAttribivARB");
  59
  60     /* WGL_ARB_pbuffer */
  61     pwglCreatePbufferARB = (void*)wglGetProcAddress("wglCreatePbufferARB");
  62     pwglGetPbufferDCARB = (void*)wglGetProcAddress("wglGetPbufferDCARB");
  63     pwglReleasePbufferDCARB = (void*)wglGetProcAddress("wglReleasePbufferDCARB");
  64 }
  65
  66 static void test_pbuffers(HDC hdc)
  67 {
  68     const int iAttribList[] = { WGL_DRAW_TO_PBUFFER_ARB, 1, /* Request pbuffer support */
  69                                 0 };
  70     int iFormats[MAX_FORMATS];
  71     unsigned int nOnscreenFormats;
  72     unsigned int nFormats;
  73     int i, res;
  74     int iPixelFormat = 0;
  75
  76     nOnscreenFormats = DescribePixelFormat(hdc, 0, 0, NULL);
  77
  78     /* When you want to render to a pbuffer you need to call wglGetPbufferDCARB which
  79      * returns a 'magic' HDC which you can then pass to wglMakeCurrent to switch rendering
  80      * to the pbuffer. Below some tests are performed on what happens if you use standard WGL calls
  81      * on this 'magic' HDC for both a pixelformat that support onscreen and offscreen rendering
  82      * and a pixelformat that's only available for offscreen rendering (this means that only
  83      * wglChoosePixelFormatARB and friends know about the format.
  84      *
  85      * The first thing we need are pixelformats with pbuffer capabilites.
  86      */
  87     res = pwglChoosePixelFormatARB(hdc, iAttribList, NULL, MAX_FORMATS, iFormats, &nFormats);
  88     if(res <= 0)
  89     {
  90         skip("No pbuffer compatible formats found while WGL_ARB_pbuffer is supported\n");
  91         return;
  92     }
  93     trace("nOnscreenFormats: %d\n", nOnscreenFormats);
  94     trace("Total number of pbuffer capable pixelformats: %d\n", nFormats);
  95
  96     /* Try to select an onscreen pixelformat out of the list */
  97     for(i=0; i < nFormats; i++)
  98     {
  99         /* Check if the format is onscreen, if it is choose it */
 100         if(iFormats[i] <= nOnscreenFormats)
 101         {
 102             iPixelFormat = iFormats[i];
 103             trace("Selected iPixelFormat=%d\n", iPixelFormat);
 104             break;
 105         }
 106     }
 107
 108     /* A video driver supports a large number of onscreen and offscreen pixelformats.
 109      * The traditional WGL calls only see a subset of the whole pixelformat list. First
 110      * of all they only see the onscreen formats (the offscreen formats are at the end of the
 111      * pixelformat list) and second extended pixelformat capabilities are hidden from the
 112      * standard WGL calls. Only functions that depend on WGL_ARB_pixel_format can see them.
 113      *
 114      * Below we check if the pixelformat is also supported onscreen.
 115      */
 116     if(iPixelFormat != 0)
 117     {
 118         HDC pbuffer_hdc;
 119         HPBUFFERARB pbuffer = pwglCreatePbufferARB(hdc, iPixelFormat, 640 /* width */, 480 /* height */, NULL);
 120         if(!pbuffer)
 121             skip("Pbuffer creation failed!\n");
 122
 123         /* Test the pixelformat returned by GetPixelFormat on a pbuffer as the behavior is not clear */
 124         pbuffer_hdc = pwglGetPbufferDCARB(pbuffer);
 125         res = GetPixelFormat(pbuffer_hdc);
 126         ok(res == iPixelFormat, "Unexpected iPixelFormat=%d returned by GetPixelFormat for format %d\n", res, iPixelFormat);
 127         trace("iPixelFormat returned by GetPixelFormat: %d\n", res);
 128         trace("PixelFormat from wglChoosePixelFormatARB: %d\n", iPixelFormat);
 129
 130         pwglReleasePbufferDCARB(pbuffer, hdc);
 131     }
 132     else skip("Pbuffer test for onscreen pixelformat skipped as no onscreen format with pbuffer capabilities have been found\n");
 133
 134     /* Search for a real offscreen format */
 135     for(i=0, iPixelFormat=0; i<nFormats; i++)
 136     {
 137         if(iFormats[i] > nOnscreenFormats)
 138         {
 139             iPixelFormat = iFormats[i];
 140             trace("Selected iPixelFormat: %d\n", iPixelFormat);
 141             break;
 142         }
 143     }
 144
 145     if(iPixelFormat != 0)
 146     {
 147         HDC pbuffer_hdc;
 148         HPBUFFERARB pbuffer = pwglCreatePbufferARB(hdc, iPixelFormat, 640 /* width */, 480 /* height */, NULL);
 149         if(!pbuffer)
 150             skip("Pbuffer creation failed!\n");
 151
 152         /* Test the pixelformat returned by GetPixelFormat on a pbuffer as the behavior is not clear */
 153         pbuffer_hdc = pwglGetPbufferDCARB(pbuffer);
 154         res = GetPixelFormat(pbuffer_hdc);
 155
 156         ok(res == 1, "Unexpected iPixelFormat=%d (1 expected) returned by GetPixelFormat for offscreen format %d\n", res, iPixelFormat);
 157         trace("iPixelFormat returned by GetPixelFormat: %d\n", res);
 158         trace("PixelFormat from wglChoosePixelFormatARB: %d\n", iPixelFormat);
 159         pwglReleasePbufferDCARB(pbuffer, hdc);
 160     }
 161     else skip("Pbuffer test for offscreen pixelformat skipped as no offscreen-only format with pbuffer capabilities has been found\n");
 162 }
 163
 164 static void test_setpixelformat(void)
 165 {
 166     int res = 0;
 167     int pf;
 168     PIXELFORMATDESCRIPTOR pfd = {
 169         sizeof(PIXELFORMATDESCRIPTOR),
 170         1,                     /* version */
 171         PFD_DRAW_TO_WINDOW |
 172         PFD_SUPPORT_OPENGL |
 173         PFD_DOUBLEBUFFER,
 174         PFD_TYPE_RGBA,
 175         24,                    /* 24-bit color depth */
 176         0, 0, 0, 0, 0, 0,      /* color bits */
 177         0,                     /* alpha buffer */
 178         0,                     /* shift bit */
 179         0,                     /* accumulation buffer */
 180         0, 0, 0, 0,            /* accum bits */
 181         32,                    /* z-buffer */
 182         0,                     /* stencil buffer */
 183         0,                     /* auxiliary buffer */
 184         PFD_MAIN_PLANE,        /* main layer */
 185         0,                     /* reserved */
 186         0, 0, 0                /* layer masks */
 187     };
 188
 189     HDC hdc = GetDC(0);
 190     ok(hdc != 0, "GetDC(0) failed!\n");
 191
 192     /* This should pass even on the main device context */
 193     pf = ChoosePixelFormat(hdc, &pfd);
 194     ok(pf != 0, "ChoosePixelFormat failed on main device context\n");
 195
 196     /* SetPixelFormat on the main device context 'X root window' should fail */
 197     res = SetPixelFormat(hdc, pf, &pfd);
 198     ok(res == 0, "SetPixelFormat on main device context should fail\n");
 199 }
 200
 201 static void test_colorbits(HDC hdc)
 202 {
 203     const int iAttribList[] = { WGL_COLOR_BITS_ARB, WGL_RED_BITS_ARB, WGL_GREEN_BITS_ARB,
 204                                 WGL_BLUE_BITS_ARB, WGL_ALPHA_BITS_ARB };
 205     int iAttribRet[sizeof(iAttribList)/sizeof(iAttribList[0])];
 206     const int iAttribs[] = { WGL_ALPHA_BITS_ARB, 1, 0 };
 207     unsigned int nFormats;
 208     int res;
 209     int iPixelFormat = 0;
 210
 211     /* We need a pixel format with at least one bit of alpha */
 212     res = pwglChoosePixelFormatARB(hdc, iAttribs, NULL, 1, &iPixelFormat, &nFormats);
 213     if(res == FALSE || nFormats == 0)
 214     {
 215         skip("No suitable pixel formats found\n");
 216         return;
 217     }
 218
 219     res = pwglGetPixelFormatAttribivARB(hdc, iPixelFormat, 0,
 220               sizeof(iAttribList)/sizeof(iAttribList[0]), iAttribList, iAttribRet);
 221     if(res == FALSE)
 222     {
 223         skip("wglGetPixelFormatAttribivARB failed\n");
 224         return;
 225     }
 226     iAttribRet[1] += iAttribRet[2]+iAttribRet[3]+iAttribRet[4];
 227     ok(iAttribRet[0] == iAttribRet[1], "WGL_COLOR_BITS_ARB (%d) does not equal R+G+B+A (%d)!\n",
 228                                        iAttribRet[0], iAttribRet[1]);
 229 }
 230
 231 static void test_gdi_dbuf(HDC hdc)
 232 {
 233     const int iAttribList[] = { WGL_SUPPORT_GDI_ARB, WGL_DOUBLE_BUFFER_ARB };
 234     int iAttribRet[sizeof(iAttribList)/sizeof(iAttribList[0])];
 235     unsigned int nFormats;
 236     int iPixelFormat;
 237     int res;
 238
 239     nFormats = DescribePixelFormat(hdc, 0, 0, NULL);
 240     for(iPixelFormat = 1;iPixelFormat <= nFormats;iPixelFormat++)
 241     {
 242         res = pwglGetPixelFormatAttribivARB(hdc, iPixelFormat, 0,
 243                   sizeof(iAttribList)/sizeof(iAttribList[0]), iAttribList,
 244                   iAttribRet);
 245         ok(res!=FALSE, "wglGetPixelFormatAttribivARB failed for pixel format %d\n", iPixelFormat);
 246         if(res == FALSE)
 247             continue;
 248
 249         ok(!(iAttribRet[0] && iAttribRet[1]), "GDI support and double buffering on pixel format %d\n", iPixelFormat);
 250     }
 251 }
 252
 253 START_TEST(opengl)
 254 {
 255     HWND hwnd;
 256     PIXELFORMATDESCRIPTOR pfd = {
 257         sizeof(PIXELFORMATDESCRIPTOR),
 258         1,                     /* version */
 259         PFD_DRAW_TO_WINDOW |
 260         PFD_SUPPORT_OPENGL |
 261         PFD_DOUBLEBUFFER,
 262         PFD_TYPE_RGBA,
 263         24,                    /* 24-bit color depth */
 264         0, 0, 0, 0, 0, 0,      /* color bits */
 265         0,                     /* alpha buffer */
 266         0,                     /* shift bit */
 267         0,                     /* accumulation buffer */
 268         0, 0, 0, 0,            /* accum bits */
 269         32,                    /* z-buffer */
 270         0,                     /* stencil buffer */
 271         0,                     /* auxiliary buffer */
 272         PFD_MAIN_PLANE,        /* main layer */
 273         0,                     /* reserved */
 274         0, 0, 0                /* layer masks */
 275     };
 276
 277     hwnd = CreateWindow("static", "Title", WS_OVERLAPPEDWINDOW,
 278                         10, 10, 200, 200, NULL, NULL, NULL, NULL);
 279     ok(hwnd != NULL, "err: %d\n", GetLastError());
 280     if (hwnd)
 281     {
 282         HDC hdc;
 283         int iPixelFormat, res;
 284         HGLRC hglrc;
 285         ShowWindow(hwnd, SW_SHOW);
 286
 287         hdc = GetDC(hwnd);
 288
 289         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
 290         ok(iPixelFormat > 0, "No pixelformat found!\n"); /* This should never happen as ChoosePixelFormat always returns a closest match */
 291
 292         res = SetPixelFormat(hdc, iPixelFormat, &pfd);
 293         ok(res, "SetPixelformat failed: %x\n", GetLastError());
 294
 295         hglrc = wglCreateContext(hdc);
 296         res = wglMakeCurrent(hdc, hglrc);
 297         ok(res, "wglMakeCurrent failed!\n");
 298         init_functions();
 299
 300         test_setpixelformat();
 301         test_colorbits(hdc);
 302         test_gdi_dbuf(hdc);
 303
 304         wgl_extensions = pwglGetExtensionsStringARB(hdc);
 305         if(wgl_extensions == NULL) skip("Skipping opengl32 tests because this OpenGL implementation doesn't support WGL extensions!\n");
 306
 307         if(strstr(wgl_extensions, "WGL_ARB_pbuffer"))
 308             test_pbuffers(hdc);
 309         else
 310             trace("WGL_ARB_pbuffer not supported, skipping pbuffer test\n");
 311
 312         DestroyWindow(hwnd);
 313     }
 314 }