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   1 /*              DirectDraw Base Functions
   2  *
   3  * Copyright 1997-1999 Marcus Meissner
   4  * Copyright 1998 Lionel Ulmer (most of Direct3D stuff)
   5  * Copyright 2000-2001 TransGaming Technologies Inc.
   6  *
   7  * This file contains the (internal) driver registration functions,
   8  * driver enumeration APIs and DirectDraw creation functions.
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #define GLPRIVATE_NO_REDEFINE
  26
  27 #include "config.h"
  28 #include "wine/port.h"
  29
  30 #include <assert.h>
  31 #include <stdarg.h>
  32 #include <string.h>
  33 #include <stdlib.h>
  34
  35 #define COBJMACROS
  36
  37 #include "windef.h"
  38 #include "winbase.h"
  39 #include "winnls.h"
  40 #include "winerror.h"
  41 #include "wingdi.h"
  42 #include "wine/exception.h"
  43 #include "excpt.h"
  44
  45 #include "ddraw.h"
  46 #include "d3d.h"
  47
  48 /* This for all the enumeration and creation of D3D-related objects */
  49 #include "ddraw_private.h"
  50 #include "wine/debug.h"
  51 #include "wine/library.h"
  52
  53 #include "gl_private.h"
  54
  55 #undef GLPRIVATE_NO_REDEFINE
  56
  57 #define MAX_DDRAW_DRIVERS 3
  58 static const ddraw_driver* DDRAW_drivers[MAX_DDRAW_DRIVERS];
  59 static int DDRAW_num_drivers; /* = 0 */
  60 static int DDRAW_default_driver;
  61
  62 void (*wine_tsx11_lock_ptr)(void) = NULL;
  63 void (*wine_tsx11_unlock_ptr)(void) = NULL;
  64
  65 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
  66
  67 /**********************************************************************/
  68
  69 typedef struct {
  70     LPVOID lpCallback;
  71     LPVOID lpContext;
  72 } DirectDrawEnumerateProcData;
  73
  74 BOOL opengl_initialized = 0;
  75
  76 #ifdef HAVE_OPENGL
  77
  78 #include "opengl_private.h"
  79
  80 static void *gl_handle = NULL;
  81
  82 #define GL_API_FUNCTION(f) typeof(f) * p##f;
  83 #include "gl_api.h"
  84 #undef GL_API_FUNCTION
  85
  86 #ifndef SONAME_LIBGL
  87 #define SONAME_LIBGL "libGL.so"
  88 #endif
  89
  90 static BOOL DDRAW_bind_to_opengl( void )
  91 {
  92     const char *glname = SONAME_LIBGL;
  93
  94     gl_handle = wine_dlopen(glname, RTLD_NOW, NULL, 0);
  95     if (!gl_handle) {
  96         WARN("Wine cannot find the OpenGL graphics library (%s).\n",glname);
  97         return FALSE;
  98     }
  99
 100 #define GL_API_FUNCTION(f)  \
 101     if((p##f = wine_dlsym(gl_handle, #f, NULL, 0)) == NULL) \
 102     { \
 103         WARN("Can't find symbol %s\n", #f); \
 104         goto sym_not_found; \
 105     }
 106 #include "gl_api.h"
 107 #undef GL_API_FUNCTION
 108
 109     /* And now calls the function to initialize the various fields for the rendering devices */
 110     return d3ddevice_init_at_startup(gl_handle);
 111
 112 sym_not_found:
 113     WARN("Wine cannot find certain functions that it needs inside the OpenGL\n"
 114          "graphics library.  To enable Wine to use OpenGL please upgrade\n"
 115          "your OpenGL libraries\n");
 116     wine_dlclose(gl_handle, NULL, 0);
 117     gl_handle = NULL;
 118     return FALSE;
 119 }
 120
 121 #endif /* HAVE_OPENGL */
 122
 123 BOOL s3tc_initialized = 0;
 124
 125 static void *s3tc_handle = NULL;
 126
 127 FUNC_FETCH_2D_TEXEL_RGBA_DXT1 fetch_2d_texel_rgba_dxt1;
 128 FUNC_FETCH_2D_TEXEL_RGBA_DXT3 fetch_2d_texel_rgba_dxt3;
 129 FUNC_FETCH_2D_TEXEL_RGBA_DXT5 fetch_2d_texel_rgba_dxt5;
 130
 131 #ifndef SONAME_LIBTXC_DXTN
 132 #define SONAME_LIBTXC_DXTN "libtxc_dxtn.so"
 133 #endif
 134
 135 static BOOL DDRAW_bind_to_s3tc( void )
 136 {
 137     const char * const s3tcname = SONAME_LIBTXC_DXTN;
 138
 139     s3tc_handle = wine_dlopen(s3tcname, RTLD_NOW, NULL, 0);
 140     if (!s3tc_handle) {
 141         TRACE("No S3TC software decompression library seems to be present (%s).\n",s3tcname);
 142         return FALSE;
 143     }
 144     TRACE("Found S3TC software decompression library (%s).\n",s3tcname);
 145
 146 #define API_FUNCTION(f)  \
 147     if((f = wine_dlsym(s3tc_handle, #f, NULL, 0)) == NULL) \
 148     { \
 149         WARN("Can't find symbol %s\n", #f); \
 150         goto sym_not_found; \
 151     }
 152     API_FUNCTION(fetch_2d_texel_rgba_dxt1);
 153     API_FUNCTION(fetch_2d_texel_rgba_dxt3);
 154     API_FUNCTION(fetch_2d_texel_rgba_dxt5);
 155 #undef API_FUNCTION
 156
 157     return TRUE;
 158
 159 sym_not_found:
 160     WARN("Wine cannot find functions that are necessary for S3TC software decompression\n");
 161     wine_dlclose(s3tc_handle, NULL, 0);
 162     s3tc_handle = NULL;
 163     return FALSE;
 164 }
 165
 166 /*******************************************************************************
 167  * DirectDrawEnumerateExA (DDRAW.@)
 168  *
 169  * Enumerates all DirectDraw devices installed on the system.
 170  *
 171  * PARAMS
 172  *  lpCallback [I] DDEnumCallbackEx function to be called with a description of
 173  *                 each enumerated HAL.
 174  *  lpContext  [I] application-defined value to be passed to the callback.
 175  *  dwFlags    [I] Specifies the enumeration scope. see msdn.
 176  *
 177  * RETURNS
 178  *  Success: DD_OK.
 179  *  Failure: DDERR_INVALIDPARAMS
 180  */
 181 HRESULT WINAPI DirectDrawEnumerateExA(
 182     LPDDENUMCALLBACKEXA lpCallback, LPVOID lpContext, DWORD dwFlags)
 183 {
 184     int i;
 185     BOOL stop = FALSE;
 186     TRACE("(%p,%p, %08lx)\n", lpCallback, lpContext, dwFlags);
 187
 188     if (TRACE_ON(ddraw)) {
 189         TRACE("  Flags : ");
 190         if (dwFlags & DDENUM_ATTACHEDSECONDARYDEVICES)
 191             TRACE("DDENUM_ATTACHEDSECONDARYDEVICES ");
 192         if (dwFlags & DDENUM_DETACHEDSECONDARYDEVICES)
 193             TRACE("DDENUM_DETACHEDSECONDARYDEVICES ");
 194         if (dwFlags & DDENUM_NONDISPLAYDEVICES)
 195             TRACE("DDENUM_NONDISPLAYDEVICES ");
 196         TRACE("\n");
 197     }
 198
 199     for (i=0; i<DDRAW_num_drivers; i++)
 200     {
 201         TRACE("Enumerating %s/%s interface\n",
 202               DDRAW_drivers[i]->info->szDriver,
 203               DDRAW_drivers[i]->info->szDescription);
 204
 205         /* We have to pass NULL from the primary display device.
 206          * RoadRage chapter 6's enumeration routine expects it. */
 207         __TRY
 208         {
 209             if (!lpCallback((DDRAW_default_driver == i) ? NULL
 210                             :(LPGUID)&DDRAW_drivers[i]->info->guidDeviceIdentifier,
 211                             (LPSTR)DDRAW_drivers[i]->info->szDescription,
 212                             (LPSTR)DDRAW_drivers[i]->info->szDriver,
 213                             lpContext, 0))
 214                 stop = TRUE;
 215         }
 216         __EXCEPT_PAGE_FAULT
 217         {
 218             return E_INVALIDARG;
 219         }
 220         __ENDTRY
 221         if (stop) return DD_OK;
 222     }
 223
 224     /* Unsupported flags */
 225     if (dwFlags & DDENUM_NONDISPLAYDEVICES) {
 226         FIXME("no non-display devices supported.\n");
 227     }
 228     if (dwFlags & DDENUM_DETACHEDSECONDARYDEVICES) {
 229         FIXME("no detached secondary devices supported.\n");
 230     }
 231
 232     return DD_OK;
 233 }
 234
 235 /*******************************************************************************
 236  * DirectDrawEnumerateExW (DDRAW.@)
 237  */
 238
 239 static BOOL CALLBACK DirectDrawEnumerateExProcW(
 240     GUID *lpGUID, LPSTR lpDriverDescription, LPSTR lpDriverName,
 241     LPVOID lpContext, HMONITOR hm)
 242 {
 243     INT len;
 244     BOOL bResult;
 245     LPWSTR lpDriverDescriptionW, lpDriverNameW;
 246     DirectDrawEnumerateProcData *pEPD = (DirectDrawEnumerateProcData*)lpContext;
 247
 248     len = MultiByteToWideChar( CP_ACP, 0, lpDriverDescription, -1, NULL, 0 );
 249     lpDriverDescriptionW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 250     MultiByteToWideChar( CP_ACP, 0, lpDriverDescription, -1, lpDriverDescriptionW, len );
 251
 252     len = MultiByteToWideChar( CP_ACP, 0, lpDriverName, -1, NULL, 0 );
 253     lpDriverNameW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 254     MultiByteToWideChar( CP_ACP, 0, lpDriverName, -1, lpDriverNameW, len );
 255
 256     bResult = (*(LPDDENUMCALLBACKEXW *) pEPD->lpCallback)(lpGUID, lpDriverDescriptionW,
 257                                                           lpDriverNameW, pEPD->lpContext, hm);
 258
 259     HeapFree(GetProcessHeap(), 0, lpDriverDescriptionW);
 260     HeapFree(GetProcessHeap(), 0, lpDriverNameW);
 261     return bResult;
 262 }
 263
 264 HRESULT WINAPI DirectDrawEnumerateExW(
 265   LPDDENUMCALLBACKEXW lpCallback, LPVOID lpContext, DWORD dwFlags)
 266 {
 267     DirectDrawEnumerateProcData epd;
 268     epd.lpCallback = (LPVOID) lpCallback;
 269     epd.lpContext = lpContext;
 270
 271     return DirectDrawEnumerateExA(DirectDrawEnumerateExProcW, (LPVOID) &epd, 0);
 272 }
 273
 274 /***********************************************************************
 275  *              DirectDrawEnumerateA (DDRAW.@)
 276  */
 277
 278 static BOOL CALLBACK DirectDrawEnumerateProcA(
 279         GUID *lpGUID, LPSTR lpDriverDescription, LPSTR lpDriverName,
 280         LPVOID lpContext, HMONITOR hm)
 281 {
 282     DirectDrawEnumerateProcData *pEPD = (DirectDrawEnumerateProcData*)lpContext;
 283
 284     return ((LPDDENUMCALLBACKA) pEPD->lpCallback)(
 285         lpGUID, lpDriverDescription, lpDriverName, pEPD->lpContext);
 286 }
 287
 288 HRESULT WINAPI DirectDrawEnumerateA(
 289   LPDDENUMCALLBACKA lpCallback, LPVOID lpContext)
 290 {
 291     DirectDrawEnumerateProcData epd;
 292     epd.lpCallback = (LPVOID) lpCallback;
 293     epd.lpContext = lpContext;
 294
 295     return DirectDrawEnumerateExA(DirectDrawEnumerateProcA, (LPVOID) &epd, 0);
 296 }
 297
 298 /***********************************************************************
 299  *              DirectDrawEnumerateW (DDRAW.@)
 300  */
 301
 302 static BOOL WINAPI DirectDrawEnumerateProcW(
 303   GUID *lpGUID, LPWSTR lpDriverDescription, LPWSTR lpDriverName,
 304   LPVOID lpContext, HMONITOR hm)
 305 {
 306     DirectDrawEnumerateProcData *pEPD = (DirectDrawEnumerateProcData*)lpContext;
 307
 308     return ((LPDDENUMCALLBACKW) pEPD->lpCallback)(
 309         lpGUID, lpDriverDescription, lpDriverName, pEPD->lpContext);
 310 }
 311
 312 HRESULT WINAPI DirectDrawEnumerateW(
 313   LPDDENUMCALLBACKW lpCallback, LPVOID lpContext)
 314 {
 315     DirectDrawEnumerateProcData epd;
 316     epd.lpCallback = (LPVOID) lpCallback;
 317     epd.lpContext = lpContext;
 318
 319     return DirectDrawEnumerateExW(DirectDrawEnumerateProcW, (LPVOID) &epd, 0);
 320 }
 321
 322 /***********************************************************************
 323  *              DirectDrawCreate (DDRAW.@)
 324  */
 325
 326 const ddraw_driver* DDRAW_FindDriver(const GUID* pGUID)
 327 {
 328     static const GUID zeroGUID; /* gets zero-inited */
 329
 330     TRACE("(%s)\n", pGUID ? debugstr_guid(pGUID) : "(null)");
 331
 332     if (DDRAW_num_drivers == 0) return NULL;
 333
 334     if (pGUID == (LPGUID)DDCREATE_EMULATIONONLY
 335         || pGUID == (LPGUID)DDCREATE_HARDWAREONLY)
 336         pGUID = NULL;
 337
 338     if (pGUID == NULL || memcmp(pGUID, &zeroGUID, sizeof(GUID)) == 0)
 339     {
 340         /* Use the default driver. */
 341         return DDRAW_drivers[DDRAW_default_driver];
 342     }
 343     else
 344     {
 345         /* Look for a matching GUID. */
 346
 347         int i;
 348         for (i=0; i < DDRAW_num_drivers; i++)
 349         {
 350             if (IsEqualGUID(pGUID,
 351                             &DDRAW_drivers[i]->info->guidDeviceIdentifier))
 352                 break;
 353         }
 354
 355         if (i < DDRAW_num_drivers)
 356         {
 357             return DDRAW_drivers[i];
 358         }
 359         else
 360         {
 361             ERR("(%s): did not recognize requested GUID.\n",debugstr_guid(pGUID));
 362             return NULL;
 363         }
 364     }
 365 }
 366
 367 static HRESULT DDRAW_Create(
 368         LPGUID lpGUID, LPVOID *lplpDD, LPUNKNOWN pUnkOuter, REFIID iid, BOOL ex
 369 ) {
 370     const ddraw_driver* driver;
 371     LPDIRECTDRAW7 pDD;
 372     HRESULT hr;
 373
 374     TRACE("(%s,%p,%p,%d)\n", debugstr_guid(lpGUID), lplpDD, pUnkOuter, ex);
 375
 376     if (DDRAW_num_drivers == 0)
 377     {
 378         WARN("no DirectDraw drivers registered\n");
 379         return DDERR_INVALIDDIRECTDRAWGUID;
 380     }
 381
 382     if (lpGUID == (LPGUID)DDCREATE_EMULATIONONLY
 383         || lpGUID == (LPGUID)DDCREATE_HARDWAREONLY)
 384         lpGUID = NULL;
 385
 386     if (pUnkOuter != NULL)
 387         return DDERR_INVALIDPARAMS; /* CLASS_E_NOAGGREGATION? */
 388
 389     driver = DDRAW_FindDriver(lpGUID);
 390     if (driver == NULL) return DDERR_INVALIDDIRECTDRAWGUID;
 391
 392     hr = driver->create(lpGUID, &pDD, pUnkOuter, ex);
 393     if (FAILED(hr)) return hr;
 394
 395     hr = IDirectDraw7_QueryInterface(pDD, iid, lplpDD);
 396     IDirectDraw7_Release(pDD);
 397     return hr;
 398 }
 399
 400 /***********************************************************************
 401  *              DirectDrawCreate (DDRAW.@)
 402  *
 403  * Only creates legacy IDirectDraw interfaces.
 404  * Cannot create IDirectDraw7 interfaces.
 405  * In theory.
 406  */
 407 HRESULT WINAPI DirectDrawCreate(
 408         LPGUID lpGUID, LPDIRECTDRAW* lplpDD, LPUNKNOWN pUnkOuter
 409 ) {
 410     TRACE("(%s,%p,%p)\n", debugstr_guid(lpGUID), lplpDD, pUnkOuter);
 411     return DDRAW_Create(lpGUID, (LPVOID*) lplpDD, pUnkOuter, &IID_IDirectDraw, FALSE);
 412 }
 413
 414 /***********************************************************************
 415  *              DirectDrawCreateEx (DDRAW.@)
 416  *
 417  * Only creates new IDirectDraw7 interfaces.
 418  * Supposed to fail if legacy interfaces are requested.
 419  * In theory.
 420  */
 421 HRESULT WINAPI DirectDrawCreateEx(
 422         LPGUID lpGUID, LPVOID* lplpDD, REFIID iid, LPUNKNOWN pUnkOuter
 423 ) {
 424     TRACE("(%s,%p,%s,%p)\n", debugstr_guid(lpGUID), lplpDD, debugstr_guid(iid), pUnkOuter);
 425
 426     if (!IsEqualGUID(iid, &IID_IDirectDraw7))
 427         return DDERR_INVALIDPARAMS;
 428
 429     return DDRAW_Create(lpGUID, lplpDD, pUnkOuter, iid, TRUE);
 430 }
 431
 432 extern HRESULT Uninit_DirectDraw_Create(const GUID*, LPDIRECTDRAW7*,
 433                                         LPUNKNOWN, BOOL);
 434
 435 /* This is for the class factory. */
 436 static HRESULT DDRAW_CreateDirectDraw(IUnknown* pUnkOuter, REFIID iid,
 437                                       LPVOID* ppObj)
 438 {
 439     LPDIRECTDRAW7 pDD;
 440     HRESULT hr;
 441     BOOL ex;
 442
 443     TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppObj);
 444
 445     /* This is a mighty hack :-) */
 446     if (IsEqualGUID(iid, &IID_IDirectDraw7))
 447         ex = TRUE;
 448     else
 449         ex = FALSE;
 450
 451     hr = Uninit_DirectDraw_Create(NULL, &pDD, pUnkOuter, ex);
 452     if (FAILED(hr)) return hr;
 453
 454     hr = IDirectDraw7_QueryInterface(pDD, iid, ppObj);
 455     IDirectDraw_Release(pDD);
 456     return hr;
 457 }
 458
 459 /******************************************************************************
 460  * DirectDraw ClassFactory
 461  */
 462 typedef struct {
 463     ICOM_VFIELD_MULTI(IClassFactory);
 464
 465     LONG ref;
 466     HRESULT (*pfnCreateInstance)(IUnknown *pUnkOuter, REFIID iid,
 467                                  LPVOID *ppObj);
 468 } IClassFactoryImpl;
 469
 470 struct object_creation_info
 471 {
 472     const CLSID *clsid;
 473     HRESULT (*pfnCreateInstance)(IUnknown *pUnkOuter, REFIID riid,
 474                                  LPVOID *ppObj);
 475 };
 476
 477 /* There should be more, but these are the only ones listed in the header
 478  * file. */
 479 extern HRESULT DDRAW_CreateDirectDrawClipper(IUnknown *pUnkOuter, REFIID riid,
 480                                              LPVOID *ppObj);
 481
 482 static const struct object_creation_info object_creation[] =
 483 {
 484     { &CLSID_DirectDraw,        DDRAW_CreateDirectDraw },
 485     { &CLSID_DirectDraw7,       DDRAW_CreateDirectDraw },
 486     { &CLSID_DirectDrawClipper, DDRAW_CreateDirectDrawClipper }
 487 };
 488
 489 static HRESULT WINAPI
 490 DDCF_QueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj)
 491 {
 492     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 493
 494     TRACE("(%p)->(%s,%p)\n", This, debugstr_guid(riid), ppobj);
 495
 496     if (IsEqualGUID(riid, &IID_IUnknown)
 497         || IsEqualGUID(riid, &IID_IClassFactory))
 498     {
 499         IClassFactory_AddRef(iface);
 500         *ppobj = This;
 501         return S_OK;
 502     }
 503
 504     WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppobj);
 505     return E_NOINTERFACE;
 506 }
 507
 508 static ULONG WINAPI DDCF_AddRef(LPCLASSFACTORY iface)
 509 {
 510     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 511     ULONG ref = InterlockedIncrement(&This->ref);
 512
 513     TRACE("(%p)->() incrementing from %ld.\n", This, ref - 1);
 514
 515     return ref;
 516 }
 517
 518 static ULONG WINAPI DDCF_Release(LPCLASSFACTORY iface)
 519 {
 520     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 521     ULONG ref = InterlockedDecrement(&This->ref);
 522     TRACE("(%p)->() decrementing from %ld.\n", This, ref+1);
 523
 524     if (ref == 0)
 525         HeapFree(GetProcessHeap(), 0, This);
 526
 527     return ref;
 528 }
 529
 530
 531 static HRESULT WINAPI DDCF_CreateInstance(
 532         LPCLASSFACTORY iface,LPUNKNOWN pOuter,REFIID riid,LPVOID *ppobj
 533 )
 534 {
 535     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 536
 537     TRACE("(%p)->(%p,%s,%p)\n",This,pOuter,debugstr_guid(riid),ppobj);
 538
 539     return This->pfnCreateInstance(pOuter, riid, ppobj);
 540 }
 541
 542 static HRESULT WINAPI DDCF_LockServer(LPCLASSFACTORY iface,BOOL dolock)
 543 {
 544     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 545     FIXME("(%p)->(%d),stub!\n",This,dolock);
 546     return S_OK;
 547 }
 548
 549 static const IClassFactoryVtbl DDCF_Vtbl =
 550 {
 551     DDCF_QueryInterface,
 552     DDCF_AddRef,
 553     DDCF_Release,
 554     DDCF_CreateInstance,
 555     DDCF_LockServer
 556 };
 557
 558 /*******************************************************************************
 559  * DllGetClassObject [DDRAW.@]
 560  * Retrieves class object from a DLL object
 561  *
 562  * NOTES
 563  *    Docs say returns STDAPI
 564  *
 565  * PARAMS
 566  *    rclsid [I] CLSID for the class object
 567  *    riid   [I] Reference to identifier of interface for class object
 568  *    ppv    [O] Address of variable to receive interface pointer for riid
 569  *
 570  * RETURNS
 571  *    Success: S_OK
 572  *    Failure: CLASS_E_CLASSNOTAVAILABLE, E_OUTOFMEMORY, E_INVALIDARG,
 573  *             E_UNEXPECTED
 574  */
 575 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 576 {
 577     unsigned int i;
 578     IClassFactoryImpl *factory;
 579
 580     TRACE("(%s,%s,%p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 581
 582     if ( !IsEqualGUID( &IID_IClassFactory, riid )
 583          && ! IsEqualGUID( &IID_IUnknown, riid) )
 584         return E_NOINTERFACE;
 585
 586     for (i=0; i < sizeof(object_creation)/sizeof(object_creation[0]); i++)
 587     {
 588         if (IsEqualGUID(object_creation[i].clsid, rclsid))
 589             break;
 590     }
 591
 592     if (i == sizeof(object_creation)/sizeof(object_creation[0]))
 593     {
 594         FIXME("%s: no class found.\n", debugstr_guid(rclsid));
 595         return CLASS_E_CLASSNOTAVAILABLE;
 596     }
 597
 598     factory = HeapAlloc(GetProcessHeap(), 0, sizeof(*factory));
 599     if (factory == NULL) return E_OUTOFMEMORY;
 600
 601     ICOM_INIT_INTERFACE(factory, IClassFactory, DDCF_Vtbl);
 602     factory->ref = 1;
 603
 604     factory->pfnCreateInstance = object_creation[i].pfnCreateInstance;
 605
 606     *ppv = ICOM_INTERFACE(factory, IClassFactory);
 607     return S_OK;
 608 }
 609
 610
 611 /*******************************************************************************
 612  * DllCanUnloadNow [DDRAW.@]  Determines whether the DLL is in use.
 613  *
 614  * RETURNS
 615  *    Success: S_OK
 616  *    Failure: S_FALSE
 617  */
 618 HRESULT WINAPI DllCanUnloadNow(void)
 619 {
 620     FIXME("(void): stub\n");
 621     return S_FALSE;
 622 }
 623
 624 /******************************************************************************
 625  * Initialisation
 626  */
 627
 628 /* Choose which driver is considered the primary display driver. It will
 629  * be created when we get a NULL guid for the DirectDrawCreate(Ex). */
 630 static int DDRAW_ChooseDefaultDriver(void)
 631 {
 632     int i;
 633     int best = 0;
 634     int best_score = 0;
 635
 636     assert(DDRAW_num_drivers > 0);
 637
 638     /* This algorithm is really stupid. */
 639     for (i=0; i < DDRAW_num_drivers; i++)
 640     {
 641         if (DDRAW_drivers[i]->preference > best_score)
 642         {
 643             best_score = DDRAW_drivers[i]->preference;
 644             best = i;
 645         }
 646     }
 647
 648     assert(best_score > 0);
 649
 650     return best;
 651 }
 652
 653 /***********************************************************************
 654  *              DllMain (DDRAW.0)
 655  */
 656 BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpv)
 657 {
 658     /* If we were sufficiently cool, DDraw drivers would just be COM
 659      * objects, registered with a particular component category. */
 660
 661     DDRAW_HAL_Init(hInstDLL, fdwReason, lpv);
 662     DDRAW_User_Init(hInstDLL, fdwReason, lpv);
 663
 664     if (fdwReason == DLL_PROCESS_ATTACH)
 665     {
 666         HMODULE mod;
 667
 668         DisableThreadLibraryCalls(hInstDLL);
 669
 670         mod = GetModuleHandleA( "winex11.drv" );
 671         if (mod)
 672         {
 673             wine_tsx11_lock_ptr   = (void *)GetProcAddress( mod, "wine_tsx11_lock" );
 674             wine_tsx11_unlock_ptr = (void *)GetProcAddress( mod, "wine_tsx11_unlock" );
 675         }
 676 #ifdef HAVE_OPENGL
 677         opengl_initialized = DDRAW_bind_to_opengl();
 678 #endif /* HAVE_OPENGL */
 679         s3tc_initialized = DDRAW_bind_to_s3tc();
 680
 681         if (DDRAW_num_drivers > 0)
 682             DDRAW_default_driver = DDRAW_ChooseDefaultDriver();
 683     }
 684
 685     return TRUE;
 686 }
 687
 688 /* Register a direct draw driver. This should be called from your init
 689  * function. (That's why there is no locking: your init func is called from
 690  * our DllInit, which is serialised.) */
 691 void DDRAW_register_driver(const ddraw_driver *driver)
 692 {
 693     int i;
 694
 695     for (i = 0; i < DDRAW_num_drivers; i++)
 696     {
 697         if (DDRAW_drivers[i] == driver)
 698         {
 699             ERR("Driver reregistering %p\n", driver);
 700             return;
 701         }
 702     }
 703
 704     if (DDRAW_num_drivers == sizeof(DDRAW_drivers)/sizeof(DDRAW_drivers[0]))
 705     {
 706         ERR("too many DDRAW drivers\n");
 707         return;
 708     }
 709
 710     DDRAW_drivers[DDRAW_num_drivers++] = driver;
 711 }
 712
 713 /* This totally doesn't belong here. */
 714 LONG DDRAW_width_bpp_to_pitch(DWORD width, DWORD bpp)
 715 {
 716     LONG pitch;
 717
 718     assert(bpp != 0); /* keeps happening... */
 719
 720     if (bpp == 15) bpp = 16;
 721     pitch = width * (bpp / 8);
 722     return pitch + (8 - (pitch % 8)) % 8;
 723 }