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   1 /* Direct3D Viewport
   2  * Copyright (c) 1998 Lionel ULMER
   3  *
   4  * This file contains the implementation of Direct3DViewport2.
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #define NONAMELESSUNION
  22 #define NONAMELESSSTRUCT
  23 #include "config.h"
  24 #include "windef.h"
  25 #include "winerror.h"
  26 #include "objbase.h"
  27 #include "ddraw.h"
  28 #include "d3d.h"
  29 #include "wine/debug.h"
  30
  31 #include "d3d_private.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
  34
  35 static void activate(IDirect3DViewportImpl* This) {
  36     IDirect3DLightImpl* light;
  37
  38     /* Activate all the lights associated with this context */
  39     light = This->lights;
  40
  41     while (light != NULL) {
  42         light->activate(light);
  43         light = light->next;
  44     }
  45 }
  46
  47
  48 static void _dump_D3DVIEWPORT(D3DVIEWPORT *lpvp)
  49 {
  50     TRACE("    - dwSize = %ld   dwX = %ld   dwY = %ld\n",
  51           lpvp->dwSize, lpvp->dwX, lpvp->dwY);
  52     TRACE("    - dwWidth = %ld   dwHeight = %ld\n",
  53           lpvp->dwWidth, lpvp->dwHeight);
  54     TRACE("    - dvScaleX = %f   dvScaleY = %f\n",
  55           lpvp->dvScaleX, lpvp->dvScaleY);
  56     TRACE("    - dvMaxX = %f   dvMaxY = %f\n",
  57           lpvp->dvMaxX, lpvp->dvMaxY);
  58     TRACE("    - dvMinZ = %f   dvMaxZ = %f\n",
  59           lpvp->dvMinZ, lpvp->dvMaxZ);
  60 }
  61
  62 static void _dump_D3DVIEWPORT2(D3DVIEWPORT2 *lpvp)
  63 {
  64     TRACE("    - dwSize = %ld   dwX = %ld   dwY = %ld\n",
  65           lpvp->dwSize, lpvp->dwX, lpvp->dwY);
  66     TRACE("    - dwWidth = %ld   dwHeight = %ld\n",
  67           lpvp->dwWidth, lpvp->dwHeight);
  68     TRACE("    - dvClipX = %f   dvClipY = %f\n",
  69           lpvp->dvClipX, lpvp->dvClipY);
  70     TRACE("    - dvClipWidth = %f   dvClipHeight = %f\n",
  71           lpvp->dvClipWidth, lpvp->dvClipHeight);
  72     TRACE("    - dvMinZ = %f   dvMaxZ = %f\n",
  73           lpvp->dvMinZ, lpvp->dvMaxZ);
  74 }
  75
  76 HRESULT WINAPI
  77 Main_IDirect3DViewportImpl_3_2_1_QueryInterface(LPDIRECT3DVIEWPORT3 iface,
  78                                                 REFIID riid,
  79                                                 LPVOID* obp)
  80 {
  81     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
  82     TRACE("(%p/%p)->(%s,%p)\n", This, iface, debugstr_guid(riid), obp);
  83
  84     *obp = NULL;
  85
  86     if ( IsEqualGUID(&IID_IUnknown,  riid) ||
  87          IsEqualGUID(&IID_IDirect3DViewport, riid) ||
  88          IsEqualGUID(&IID_IDirect3DViewport2, riid) ||
  89          IsEqualGUID(&IID_IDirect3DViewport3, riid) ) {
  90         IDirect3DViewport3_AddRef(ICOM_INTERFACE(This, IDirect3DViewport3));
  91         *obp = ICOM_INTERFACE(This, IDirect3DViewport3);
  92         TRACE("  Creating IDirect3DViewport1/2/3 interface %p\n", *obp);
  93         return S_OK;
  94     }
  95     FIXME("(%p): interface for IID %s NOT found!\n", This, debugstr_guid(riid));
  96     return OLE_E_ENUM_NOMORE;
  97 }
  98
  99 ULONG WINAPI
 100 Main_IDirect3DViewportImpl_3_2_1_AddRef(LPDIRECT3DVIEWPORT3 iface)
 101 {
 102     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 103     TRACE("(%p/%p)->() incrementing from %lu.\n", This, iface, This->ref);
 104     return ++(This->ref);
 105 }
 106
 107 ULONG WINAPI
 108 Main_IDirect3DViewportImpl_3_2_1_Release(LPDIRECT3DVIEWPORT3 iface)
 109 {
 110     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 111     TRACE("(%p/%p)->() decrementing from %lu.\n", This, iface, This->ref);
 112     if (!--(This->ref)) {
 113         HeapFree(GetProcessHeap(), 0, This);
 114         return 0;
 115     }
 116     return This->ref;
 117 }
 118
 119
 120 HRESULT WINAPI
 121 Main_IDirect3DViewportImpl_3_2_1_Initialize(LPDIRECT3DVIEWPORT3 iface,
 122                                             LPDIRECT3D lpDirect3D)
 123 {
 124     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 125     TRACE("(%p/%p)->(%p) no-op...\n", This, iface, lpDirect3D);
 126     return DD_OK;
 127 }
 128
 129 HRESULT WINAPI
 130 Main_IDirect3DViewportImpl_3_2_1_GetViewport(LPDIRECT3DVIEWPORT3 iface,
 131                                              LPD3DVIEWPORT lpData)
 132 {
 133     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 134     DWORD dwSize;
 135     TRACE("(%p/%p)->(%p)\n", This, iface, lpData);
 136     if (This->use_vp2 != 0) {
 137         ERR("  Requesting to get a D3DVIEWPORT struct where a D3DVIEWPORT2 was set !\n");
 138         return DDERR_INVALIDPARAMS;
 139     }
 140     dwSize = lpData->dwSize;
 141     memset(lpData, 0, dwSize);
 142     memcpy(lpData, &(This->viewports.vp1), dwSize);
 143
 144     if (TRACE_ON(ddraw)) {
 145         TRACE("  returning D3DVIEWPORT :\n");
 146         _dump_D3DVIEWPORT(lpData);
 147     }
 148
 149     return DD_OK;
 150 }
 151
 152 HRESULT WINAPI
 153 Main_IDirect3DViewportImpl_3_2_1_SetViewport(LPDIRECT3DVIEWPORT3 iface,
 154                                              LPD3DVIEWPORT lpData)
 155 {
 156     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 157     TRACE("(%p/%p)->(%p)\n", This, iface, lpData);
 158
 159     if (TRACE_ON(ddraw)) {
 160         TRACE("  getting D3DVIEWPORT :\n");
 161         _dump_D3DVIEWPORT(lpData);
 162     }
 163
 164     This->use_vp2 = 0;
 165     memset(&(This->viewports.vp1), 0, sizeof(This->viewports.vp1));
 166     memcpy(&(This->viewports.vp1), lpData, lpData->dwSize);
 167     return DD_OK;
 168 }
 169
 170 HRESULT WINAPI
 171 Main_IDirect3DViewportImpl_3_2_1_TransformVertices(LPDIRECT3DVIEWPORT3 iface,
 172                                                    DWORD dwVertexCount,
 173                                                    LPD3DTRANSFORMDATA lpData,
 174                                                    DWORD dwFlags,
 175                                                    LPDWORD lpOffScreen)
 176 {
 177     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 178     FIXME("(%p/%p)->(%08lx,%p,%08lx,%p): stub!\n", This, iface, dwVertexCount, lpData, dwFlags, lpOffScreen);
 179     return DD_OK;
 180 }
 181
 182 HRESULT WINAPI
 183 Main_IDirect3DViewportImpl_3_2_1_LightElements(LPDIRECT3DVIEWPORT3 iface,
 184                                                DWORD dwElementCount,
 185                                                LPD3DLIGHTDATA lpData)
 186 {
 187     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 188     FIXME("(%p/%p)->(%08lx,%p): stub!\n", This, iface, dwElementCount, lpData);
 189     return DD_OK;
 190 }
 191
 192 HRESULT WINAPI
 193 Main_IDirect3DViewportImpl_3_2_1_SetBackground(LPDIRECT3DVIEWPORT3 iface,
 194                                                D3DMATERIALHANDLE hMat)
 195 {
 196     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 197     TRACE("(%p/%p)->(%08lx)\n", This, iface, (DWORD) hMat);
 198
 199     This->background = (IDirect3DMaterialImpl *) hMat;
 200     TRACE(" setting background color : %f %f %f %f\n",
 201           This->background->mat.u.diffuse.u1.r,
 202           This->background->mat.u.diffuse.u2.g,
 203           This->background->mat.u.diffuse.u3.b,
 204           This->background->mat.u.diffuse.u4.a);
 205
 206     return DD_OK;
 207 }
 208
 209 HRESULT WINAPI
 210 Main_IDirect3DViewportImpl_3_2_1_GetBackground(LPDIRECT3DVIEWPORT3 iface,
 211                                                LPD3DMATERIALHANDLE lphMat,
 212                                                LPBOOL lpValid)
 213 {
 214     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 215     FIXME("(%p/%p)->(%p,%p): stub!\n", This, iface, lphMat, lpValid);
 216     return DD_OK;
 217 }
 218
 219 HRESULT WINAPI
 220 Main_IDirect3DViewportImpl_3_2_1_SetBackgroundDepth(LPDIRECT3DVIEWPORT3 iface,
 221                                                     LPDIRECTDRAWSURFACE lpDDSurface)
 222 {
 223     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 224     FIXME("(%p/%p)->(%p): stub!\n", This, iface, lpDDSurface);
 225     return DD_OK;
 226 }
 227
 228 HRESULT WINAPI
 229 Main_IDirect3DViewportImpl_3_2_1_GetBackgroundDepth(LPDIRECT3DVIEWPORT3 iface,
 230                                                     LPDIRECTDRAWSURFACE* lplpDDSurface,
 231                                                     LPBOOL lpValid)
 232 {
 233     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 234     FIXME("(%p/%p)->(%p,%p): stub!\n", This, iface, lplpDDSurface, lpValid);
 235     return DD_OK;
 236 }
 237
 238 HRESULT WINAPI
 239 Main_IDirect3DViewportImpl_3_2_1_Clear(LPDIRECT3DVIEWPORT3 iface,
 240                                        DWORD dwCount,
 241                                        LPD3DRECT lpRects,
 242                                        DWORD dwFlags)
 243 {
 244     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 245     DWORD color = 0x00000000;
 246
 247     TRACE("(%p/%p)->(%08lx,%p,%08lx)\n", This, iface, dwCount, lpRects, dwFlags);
 248     if (This->active_device == NULL) {
 249         ERR(" Trying to clear a viewport not attached to a device !\n");
 250         return D3DERR_VIEWPORTHASNODEVICE;
 251     }
 252     if (dwFlags & D3DCLEAR_TARGET) {
 253         if (This->background == NULL) {
 254             ERR(" Trying to clear the color buffer without background material !\n");
 255         } else {
 256             color =
 257               ((int) ((This->background->mat.u.diffuse.u1.r) * 255) << 16) |
 258               ((int) ((This->background->mat.u.diffuse.u2.g) * 255) <<  8) |
 259               ((int) ((This->background->mat.u.diffuse.u3.b) * 255) <<  0) |
 260               ((int) ((This->background->mat.u.diffuse.u4.a) * 255) << 24);
 261         }
 262     }
 263     return This->active_device->clear(This->active_device, dwCount, lpRects,
 264                                       dwFlags & (D3DCLEAR_ZBUFFER | D3DCLEAR_TARGET),
 265                                       color, 1.0, 0x00000000);
 266 }
 267
 268 HRESULT WINAPI
 269 Main_IDirect3DViewportImpl_3_2_1_AddLight(LPDIRECT3DVIEWPORT3 iface,
 270                                           LPDIRECT3DLIGHT lpDirect3DLight)
 271 {
 272     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 273     IDirect3DLightImpl *lpDirect3DLightImpl = ICOM_OBJECT(IDirect3DLightImpl, IDirect3DLight, lpDirect3DLight);
 274     DWORD i = 0;
 275     DWORD map = This->map_lights;
 276
 277     TRACE("(%p/%p)->(%p)\n", This, iface, lpDirect3DLight);
 278
 279     if (This->num_lights >= 8)
 280         return DDERR_INVALIDPARAMS;
 281
 282     /* Find a light number and update both light and viewports objects accordingly */
 283     while(map&1) {
 284         map>>=1;
 285         i++;
 286     }
 287     lpDirect3DLightImpl->dwLightIndex = i;
 288     This->num_lights++;
 289     This->map_lights |= 1<<i;
 290
 291     /* Add the light in the 'linked' chain */
 292     lpDirect3DLightImpl->next = This->lights;
 293     This->lights = lpDirect3DLightImpl;
 294
 295     /* Attach the light to the viewport */
 296     lpDirect3DLightImpl->active_viewport = This;
 297
 298     /* If active, activate the light */
 299     if (This->active_device != NULL) {
 300         lpDirect3DLightImpl->activate(lpDirect3DLightImpl);
 301     }
 302
 303     return DD_OK;
 304 }
 305
 306 HRESULT WINAPI
 307 Main_IDirect3DViewportImpl_3_2_1_DeleteLight(LPDIRECT3DVIEWPORT3 iface,
 308                                              LPDIRECT3DLIGHT lpDirect3DLight)
 309 {
 310     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 311     IDirect3DLightImpl *lpDirect3DLightImpl = ICOM_OBJECT(IDirect3DLightImpl, IDirect3DLight, lpDirect3DLight);
 312     IDirect3DLightImpl *cur_light, *prev_light = NULL;
 313
 314     TRACE("(%p/%p)->(%p)\n", This, iface, lpDirect3DLight);
 315     cur_light = This->lights;
 316     while (cur_light != NULL) {
 317         if (cur_light == lpDirect3DLightImpl) {
 318             lpDirect3DLightImpl->desactivate(lpDirect3DLightImpl);
 319             if (prev_light == NULL) This->lights = cur_light->next;
 320             else prev_light->next = cur_light->next;
 321             /* Detach the light to the viewport */
 322             cur_light->active_viewport = NULL;
 323             This->num_lights--;
 324             This->map_lights &= ~(1<<lpDirect3DLightImpl->dwLightIndex);
 325             return DD_OK;
 326         }
 327         prev_light = cur_light;
 328         cur_light = cur_light->next;
 329     }
 330     return DDERR_INVALIDPARAMS;
 331 }
 332
 333 HRESULT WINAPI
 334 Main_IDirect3DViewportImpl_3_2_1_NextLight(LPDIRECT3DVIEWPORT3 iface,
 335                                            LPDIRECT3DLIGHT lpDirect3DLight,
 336                                            LPDIRECT3DLIGHT* lplpDirect3DLight,
 337                                            DWORD dwFlags)
 338 {
 339     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 340     FIXME("(%p/%p)->(%p,%p,%08lx): stub!\n", This, iface, lpDirect3DLight, lplpDirect3DLight, dwFlags);
 341     return DD_OK;
 342 }
 343
 344 HRESULT WINAPI
 345 Main_IDirect3DViewportImpl_3_2_GetViewport2(LPDIRECT3DVIEWPORT3 iface,
 346                                             LPD3DVIEWPORT2 lpData)
 347 {
 348     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 349     DWORD dwSize;
 350     TRACE("(%p/%p)->(%p)\n", This, iface, lpData);
 351     if (This->use_vp2 != 1) {
 352         ERR("  Requesting to get a D3DVIEWPORT2 struct where a D3DVIEWPORT was set !\n");
 353         return DDERR_INVALIDPARAMS;
 354     }
 355     dwSize = lpData->dwSize;
 356     memset(lpData, 0, dwSize);
 357     memcpy(lpData, &(This->viewports.vp2), dwSize);
 358
 359     if (TRACE_ON(ddraw)) {
 360         TRACE("  returning D3DVIEWPORT2 :\n");
 361         _dump_D3DVIEWPORT2(lpData);
 362     }
 363
 364     return DD_OK;
 365 }
 366
 367 HRESULT WINAPI
 368 Main_IDirect3DViewportImpl_3_2_SetViewport2(LPDIRECT3DVIEWPORT3 iface,
 369                                             LPD3DVIEWPORT2 lpData)
 370 {
 371     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 372     TRACE("(%p/%p)->(%p)\n", This, iface, lpData);
 373
 374     if (TRACE_ON(ddraw)) {
 375         TRACE("  getting D3DVIEWPORT2 :\n");
 376         _dump_D3DVIEWPORT2(lpData);
 377     }
 378
 379     This->use_vp2 = 1;
 380     memset(&(This->viewports.vp2), 0, sizeof(This->viewports.vp2));
 381     memcpy(&(This->viewports.vp2), lpData, lpData->dwSize);
 382     return DD_OK;
 383 }
 384
 385 HRESULT WINAPI
 386 Main_IDirect3DViewportImpl_3_SetBackgroundDepth2(LPDIRECT3DVIEWPORT3 iface,
 387                                                  LPDIRECTDRAWSURFACE4 lpDDS)
 388 {
 389     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 390     FIXME("(%p/%p)->(%p): stub!\n", This, iface, lpDDS);
 391     return DD_OK;
 392 }
 393
 394 HRESULT WINAPI
 395 Main_IDirect3DViewportImpl_3_GetBackgroundDepth2(LPDIRECT3DVIEWPORT3 iface,
 396                                                  LPDIRECTDRAWSURFACE4* lplpDDS,
 397                                                  LPBOOL lpValid)
 398 {
 399     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 400     FIXME("(%p/%p)->(%p,%p): stub!\n", This, iface, lplpDDS, lpValid);
 401     return DD_OK;
 402 }
 403
 404 HRESULT WINAPI
 405 Main_IDirect3DViewportImpl_3_Clear2(LPDIRECT3DVIEWPORT3 iface,
 406                                     DWORD dwCount,
 407                                     LPD3DRECT lpRects,
 408                                     DWORD dwFlags,
 409                                     DWORD dwColor,
 410                                     D3DVALUE dvZ,
 411                                     DWORD dwStencil)
 412 {
 413     ICOM_THIS_FROM(IDirect3DViewportImpl, IDirect3DViewport3, iface);
 414     TRACE("(%p/%p)->(%08lx,%p,%08lx,%08lx,%f,%08lx)\n", This, iface, dwCount, lpRects, dwFlags, dwColor, dvZ, dwStencil);
 415     if (This->active_device == NULL) {
 416         ERR(" Trying to clear a viewport not attached to a device !\n");
 417         return D3DERR_VIEWPORTHASNODEVICE;
 418     }
 419     return This->active_device->clear(This->active_device, dwCount, lpRects, dwFlags, dwColor, dvZ, dwStencil);
 420 }
 421
 422 #if !defined(__STRICT_ANSI__) && defined(__GNUC__)
 423 # define XCAST(fun)     (typeof(VTABLE_IDirect3DViewport3.fun))
 424 #else
 425 # define XCAST(fun)     (void*)
 426 #endif
 427
 428 ICOM_VTABLE(IDirect3DViewport3) VTABLE_IDirect3DViewport3 =
 429 {
 430     ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 431     XCAST(QueryInterface) Main_IDirect3DViewportImpl_3_2_1_QueryInterface,
 432     XCAST(AddRef) Main_IDirect3DViewportImpl_3_2_1_AddRef,
 433     XCAST(Release) Main_IDirect3DViewportImpl_3_2_1_Release,
 434     XCAST(Initialize) Main_IDirect3DViewportImpl_3_2_1_Initialize,
 435     XCAST(GetViewport) Main_IDirect3DViewportImpl_3_2_1_GetViewport,
 436     XCAST(SetViewport) Main_IDirect3DViewportImpl_3_2_1_SetViewport,
 437     XCAST(TransformVertices) Main_IDirect3DViewportImpl_3_2_1_TransformVertices,
 438     XCAST(LightElements) Main_IDirect3DViewportImpl_3_2_1_LightElements,
 439     XCAST(SetBackground) Main_IDirect3DViewportImpl_3_2_1_SetBackground,
 440     XCAST(GetBackground) Main_IDirect3DViewportImpl_3_2_1_GetBackground,
 441     XCAST(SetBackgroundDepth) Main_IDirect3DViewportImpl_3_2_1_SetBackgroundDepth,
 442     XCAST(GetBackgroundDepth) Main_IDirect3DViewportImpl_3_2_1_GetBackgroundDepth,
 443     XCAST(Clear) Main_IDirect3DViewportImpl_3_2_1_Clear,
 444     XCAST(AddLight) Main_IDirect3DViewportImpl_3_2_1_AddLight,
 445     XCAST(DeleteLight) Main_IDirect3DViewportImpl_3_2_1_DeleteLight,
 446     XCAST(NextLight) Main_IDirect3DViewportImpl_3_2_1_NextLight,
 447     XCAST(GetViewport2) Main_IDirect3DViewportImpl_3_2_GetViewport2,
 448     XCAST(SetViewport2) Main_IDirect3DViewportImpl_3_2_SetViewport2,
 449     XCAST(SetBackgroundDepth2) Main_IDirect3DViewportImpl_3_SetBackgroundDepth2,
 450     XCAST(GetBackgroundDepth2) Main_IDirect3DViewportImpl_3_GetBackgroundDepth2,
 451     XCAST(Clear2) Main_IDirect3DViewportImpl_3_Clear2,
 452 };
 453
 454 #if !defined(__STRICT_ANSI__) && defined(__GNUC__)
 455 #undef XCAST
 456 #endif
 457
 458
 459
 460
 461 HRESULT d3dviewport_create(IDirect3DViewportImpl **obj, IDirect3DImpl *d3d)
 462 {
 463     IDirect3DViewportImpl *object;
 464
 465     object = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirect3DViewportImpl));
 466     if (object == NULL) return DDERR_OUTOFMEMORY;
 467
 468     object->ref = 1;
 469     object->d3d = d3d;
 470     object->activate = activate;
 471     object->use_vp2 = 0xFF;
 472     object->next = NULL;
 473     object->lights = NULL;
 474     object->num_lights = 0;
 475     object->map_lights = 0;
 476
 477     ICOM_INIT_INTERFACE(object, IDirect3DViewport3, VTABLE_IDirect3DViewport3);
 478
 479     *obj = object;
 480
 481     TRACE(" creating implementation at %p.\n", *obj);
 482
 483     return D3D_OK;
 484 }