dlls/wined3d/vertexbuffer.c

   1 /*
   2  * IWineD3DVertexBuffer Implementation
   3  *
   4  * Copyright 2002-2005 Jason Edmeades
   5  *                     Raphael Junqueira
   6  * Copyright 2004 Christian Costa
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wined3d_private.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(d3d);
  27 #define GLINFO_LOCATION This->resource.wineD3DDevice->adapter->gl_info
  28
  29 #define VB_MAXDECLCHANGES     100     /* After that number we stop converting */
  30 #define VB_RESETDECLCHANGE    1000    /* Reset the changecount after that number of draws */
  31
  32 /* *******************************************
  33    IWineD3DVertexBuffer IUnknown parts follow
  34    ******************************************* */
  35 static HRESULT WINAPI IWineD3DVertexBufferImpl_QueryInterface(IWineD3DVertexBuffer *iface, REFIID riid, LPVOID *ppobj)
  36 {
  37     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
  38     TRACE("(%p)->(%s,%p)\n",This,debugstr_guid(riid),ppobj);
  39     if (IsEqualGUID(riid, &IID_IUnknown)
  40         || IsEqualGUID(riid, &IID_IWineD3DBase)
  41         || IsEqualGUID(riid, &IID_IWineD3DResource)
  42         || IsEqualGUID(riid, &IID_IWineD3DVertexBuffer)){
  43         IUnknown_AddRef(iface);
  44         *ppobj = This;
  45         return S_OK;
  46     }
  47     *ppobj = NULL;
  48     return E_NOINTERFACE;
  49 }
  50
  51 static ULONG WINAPI IWineD3DVertexBufferImpl_AddRef(IWineD3DVertexBuffer *iface) {
  52     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
  53     ULONG ref = InterlockedIncrement(&This->resource.ref);
  54     TRACE("(%p) : AddRef increasing from %d\n", This, ref - 1);
  55     return ref;
  56 }
  57
  58 static ULONG WINAPI IWineD3DVertexBufferImpl_Release(IWineD3DVertexBuffer *iface) {
  59     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
  60     ULONG ref = InterlockedDecrement(&This->resource.ref);
  61     TRACE("(%p) : Releasing from %d\n", This, ref + 1);
  62     if (ref == 0) {
  63
  64         if(This->vbo) {
  65             IWineD3DDeviceImpl *device = This->resource.wineD3DDevice;
  66
  67             ActivateContext(device, device->lastActiveRenderTarget, CTXUSAGE_RESOURCELOAD);
  68             ENTER_GL();
  69             GL_EXTCALL(glDeleteBuffersARB(1, &This->vbo));
  70             checkGLcall("glDeleteBuffersARB");
  71             LEAVE_GL();
  72         }
  73
  74         IWineD3DResourceImpl_CleanUp((IWineD3DResource *)iface);
  75         HeapFree(GetProcessHeap(), 0, This);
  76     }
  77     return ref;
  78 }
  79
  80 /* ****************************************************
  81    IWineD3DVertexBuffer IWineD3DResource parts follow
  82    **************************************************** */
  83 static HRESULT WINAPI IWineD3DVertexBufferImpl_GetDevice(IWineD3DVertexBuffer *iface, IWineD3DDevice** ppDevice) {
  84     return IWineD3DResourceImpl_GetDevice((IWineD3DResource *)iface, ppDevice);
  85 }
  86
  87 static HRESULT WINAPI IWineD3DVertexBufferImpl_SetPrivateData(IWineD3DVertexBuffer *iface, REFGUID refguid, CONST void* pData, DWORD SizeOfData, DWORD Flags) {
  88     return IWineD3DResourceImpl_SetPrivateData((IWineD3DResource *)iface, refguid, pData, SizeOfData, Flags);
  89 }
  90
  91 static HRESULT WINAPI IWineD3DVertexBufferImpl_GetPrivateData(IWineD3DVertexBuffer *iface, REFGUID refguid, void* pData, DWORD* pSizeOfData) {
  92     return IWineD3DResourceImpl_GetPrivateData((IWineD3DResource *)iface, refguid, pData, pSizeOfData);
  93 }
  94
  95 static HRESULT WINAPI IWineD3DVertexBufferImpl_FreePrivateData(IWineD3DVertexBuffer *iface, REFGUID refguid) {
  96     return IWineD3DResourceImpl_FreePrivateData((IWineD3DResource *)iface, refguid);
  97 }
  98
  99 static DWORD    WINAPI IWineD3DVertexBufferImpl_SetPriority(IWineD3DVertexBuffer *iface, DWORD PriorityNew) {
 100     return IWineD3DResourceImpl_SetPriority((IWineD3DResource *)iface, PriorityNew);
 101 }
 102
 103 static DWORD    WINAPI IWineD3DVertexBufferImpl_GetPriority(IWineD3DVertexBuffer *iface) {
 104     return IWineD3DResourceImpl_GetPriority((IWineD3DResource *)iface);
 105 }
 106
 107 static void fixup_vertices(
 108         BYTE *src, BYTE *dst,
 109         int stride,
 110         int num,
 111         int pos, BOOL haspos,
 112         int diffuse, BOOL hasdiffuse,
 113         int specular, BOOL hasspecular
 114 ) {
 115     int i;
 116     float x, y, z, w;
 117
 118     for(i = num - 1; i >= 0; i--) {
 119         if(haspos) {
 120             float *p = (float *) ((src + pos) + i * stride);
 121
 122             /* rhw conversion like in drawStridedSlow */
 123             if(p[3] == 1.0 || ((p[3] < eps) && (p[3] > -eps))) {
 124                 x = p[0];
 125                 y = p[1];
 126                 z = p[2];
 127                 w = 1.0;
 128             } else {
 129                 w = 1.0 / p[3];
 130                 x = p[0] * w;
 131                 y = p[1] * w;
 132                 z = p[2] * w;
 133             }
 134             p = (float *) (dst + i * stride + pos);
 135             p[0] = x;
 136             p[1] = y;
 137             p[2] = z;
 138             p[3] = w;
 139         }
 140         if(hasdiffuse) {
 141             DWORD srcColor, *dstColor = (DWORD *) (dst + i * stride + diffuse);
 142             srcColor = * (DWORD *) ( (src + diffuse) + i * stride);
 143
 144             /* Color conversion like in drawStridedSlow. watch out for little endianity
 145             * If we want that stuff to work on big endian machines too we have to consider more things
 146             *
 147             * 0xff000000: Alpha mask
 148             * 0x00ff0000: Blue mask
 149             * 0x0000ff00: Green mask
 150             * 0x000000ff: Red mask
 151             */
 152
 153             *dstColor = 0;
 154             *dstColor |= (srcColor & 0xff00ff00)      ;   /* Alpha Green */
 155             *dstColor |= (srcColor & 0x00ff0000) >> 16;   /* Red */
 156             *dstColor |= (srcColor & 0x000000ff) << 16;   /* Blue */
 157         }
 158         if(hasspecular) {
 159             DWORD srcColor, *dstColor = (DWORD *) (dst + i * stride + specular);
 160             srcColor = * (DWORD *) ( (src + specular) + i * stride);
 161
 162             /* Similar to diffuse
 163              * TODO: Write the alpha value out for fog coords
 164              */
 165             *dstColor = 0;
 166             *dstColor |= (srcColor & 0xff00ff00)      ;   /* Alpha Green */
 167             *dstColor |= (srcColor & 0x00ff0000) >> 16;   /* Red */
 168             *dstColor |= (srcColor & 0x000000ff) << 16;   /* Blue */
 169         }
 170     }
 171 }
 172
 173 inline BOOL WINAPI IWineD3DVertexBufferImpl_FindDecl(IWineD3DVertexBufferImpl *This)
 174 {
 175     WineDirect3DVertexStridedData strided;
 176     IWineD3DDeviceImpl *device = This->resource.wineD3DDevice;
 177
 178     /* In d3d7 the vertex buffer declaration NEVER changes because it is stored in the d3d7 vertex buffer.
 179      * Once we have our declaration there is no need to look it up again.
 180      */
 181     if(((IWineD3DImpl *)device->wineD3D)->dxVersion == 7 && This->Flags & VBFLAG_HASDESC) {
 182         return FALSE;
 183     }
 184
 185     /* There are certain vertex data types that need to be fixed up. The Vertex Buffers FVF doesn't
 186      * help finding them, only the vertex declaration or the device FVF can determine that at drawPrim
 187      * time. Rules are as follows:
 188      *
 189      * -> No modification when Vertex Shaders are used
 190      * -> Fix up position1 and position 2 if they are XYZRHW
 191      * -> Fix up diffuse color
 192      * -> Fix up specular color
 193      *
 194      * The Declaration is only known at drawing time, and it can change from draw to draw. If any converted values
 195      * are changed, the whole buffer has to be reconverted and reloaded. (Converting is SLOW, so if this happens too
 196      * often PreLoad stops converting entirely and falls back to drawStridedSlow).
 197      *
 198      * Reconvert if:
 199      * -> New semantics that have to be converted appear
 200      * -> The position of semantics that have to be converted changes
 201      * -> The stride of the vertex changed AND there is stuff that needs conversion
 202      * -> (If a vertex shader is bound and in use assume that nothing that needs conversion is there)
 203      *
 204      * Return values:
 205      *  TRUE: Reload is needed
 206      *  FALSE: otherwise
 207      */
 208
 209     if (use_vs(device)) {
 210         /* Assume no conversion */
 211         memset(&strided, 0, sizeof(strided));
 212     } else {
 213         /* we need a copy because we modify some params */
 214         memcpy(&strided, &device->strided_streams, sizeof(strided));
 215
 216         /* Filter out data that does not come from this VBO */
 217         if(strided.u.s.position.VBO != This->vbo)    memset(&strided.u.s.position, 0, sizeof(strided.u.s.position));
 218         if(strided.u.s.diffuse.VBO != This->vbo)     memset(&strided.u.s.diffuse, 0, sizeof(strided.u.s.diffuse));
 219         if(strided.u.s.specular.VBO != This->vbo)    memset(&strided.u.s.specular, 0, sizeof(strided.u.s.specular));
 220         if(strided.u.s.position2.VBO != This->vbo)   memset(&strided.u.s.position2, 0, sizeof(strided.u.s.position2));
 221     }
 222
 223     /* We have a declaration now in the buffer */
 224     This->Flags |= VBFLAG_HASDESC;
 225
 226     /* Find out if reload is needed
 227      * Position of the semantic in the vertex and the stride must be equal to the stored type. Don't mind if only unconverted stuff changed.
 228      *
 229      * If some stuff does not exist in the buffer, then lpData, dwStride and dwType are memsetted to 0. So if the semantic didn't exist before
 230      * and does not exist now all 3 values will be equal(=0).
 231      *
 232      * Checking the lpData field alone is not enough, because data may appear at offset 0 in the buffer. This is the same location as nonexistent
 233      * data uses, so we have to check the type and stride too. Colors can be at offset 0 too, because it is perfectly fine to render from 2 or more
 234      * buffers at the same time and get the position from one and the color from the other buffer.
 235      */
 236     if( /* Position transformed vs untransformed */
 237         ((This->strided.u.s.position_transformed || strided.u.s.position_transformed) &&
 238           (This->strided.u.s.position.lpData != strided.u.s.position.lpData ||
 239            This->strided.u.s.position.dwType != strided.u.s.position.dwType)) ||
 240         /* Diffuse position and data type */
 241         This->strided.u.s.diffuse.lpData != strided.u.s.diffuse.lpData || This->strided.u.s.diffuse.dwStride != strided.u.s.diffuse.dwStride ||
 242          This->strided.u.s.diffuse.dwType != strided.u.s.diffuse.dwType ||
 243         /* Specular position and data type */
 244         This->strided.u.s.specular.lpData != strided.u.s.specular.lpData || This->strided.u.s.specular.dwStride != strided.u.s.specular.dwStride ||
 245          This->strided.u.s.specular.dwType != strided.u.s.specular.dwType) {
 246
 247         TRACE("Declaration changed, reloading buffer\n");
 248         /* Set the new description */
 249         memcpy(&This->strided, &strided, sizeof(strided));
 250         return TRUE;
 251     }
 252
 253     return FALSE;
 254 }
 255
 256 static void     WINAPI IWineD3DVertexBufferImpl_PreLoad(IWineD3DVertexBuffer *iface) {
 257     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *) iface;
 258     IWineD3DDeviceImpl *device = This->resource.wineD3DDevice;
 259     BYTE *data;
 260     UINT start = 0, end = 0, stride = 0;
 261     BOOL declChanged = FALSE;
 262     TRACE("(%p)->()\n", This);
 263
 264     if(This->Flags & VBFLAG_LOAD) {
 265         return; /* Already doing that stuff */
 266     }
 267
 268     if(!This->vbo) {
 269         /* TODO: Make converting independent from VBOs */
 270         return; /* Not doing any conversion */
 271     }
 272
 273     /* Reading the declaration makes only sense if the stateblock is finalized and the buffer bound to a stream */
 274     if(device->isInDraw && This->bindCount > 0) {
 275         declChanged = IWineD3DVertexBufferImpl_FindDecl(This);
 276     } else if(This->Flags & VBFLAG_HASDESC) {
 277         /* Reuse the declaration stored in the buffer. It will most likely not change, and if it does
 278          * the stream source state handler will call PreLoad again and the change will be cought
 279          */
 280     } else {
 281         /* Cannot get a declaration, and no declaration is stored in the buffer. It is pointless to preload
 282          * now. When the buffer is used, PreLoad will be called by the stream source state handler and a valid
 283          * declaration for the buffer can be found
 284          */
 285         return;
 286     }
 287
 288     /* If applications change the declaration over and over, reconverting all the time is a huge
 289      * performance hit. So count the declaration changes and release the VBO if there are too much
 290      * of them(and thus stop converting)
 291      */
 292     if(declChanged) {
 293         This->declChanges++;
 294         This->draws = 0;
 295
 296         if(This->declChanges > VB_MAXDECLCHANGES) {
 297             FIXME("Too much declaration changes, stopping converting\n");
 298             ActivateContext(device, device->lastActiveRenderTarget, CTXUSAGE_RESOURCELOAD);
 299             ENTER_GL();
 300             GL_EXTCALL(glDeleteBuffersARB(1, &This->vbo));
 301             checkGLcall("glDeleteBuffersARB");
 302             LEAVE_GL();
 303             This->vbo = 0;
 304
 305             /* The stream source state handler might have read the memory of the vertex buffer already
 306              * and got the memory in the vbo which is not valid any longer. Dirtify the stream source
 307              * to force a reload. This happens only once per changed vertexbuffer and should occur rather
 308              * rarely
 309              */
 310             IWineD3DDeviceImpl_MarkStateDirty(device, STATE_STREAMSRC);
 311
 312             return;
 313         }
 314     } else {
 315         /* However, it is perfectly fine to change the declaration every now and then. We don't want a game that
 316          * changes it every minute drop the VBO after VB_MAX_DECL_CHANGES minutes. So count draws without
 317          * decl changes and reset the decl change count after a specific number of them
 318          */
 319         This->draws++;
 320         if(This->draws > VB_RESETDECLCHANGE) This->declChanges = 0;
 321     }
 322
 323     if(declChanged) {
 324         /* The declaration changed, reload the whole buffer */
 325         WARN("Reloading buffer because of decl change\n");
 326         start = 0;
 327         end = This->resource.size;
 328     } else if(This->Flags & VBFLAG_DIRTY) {
 329         /* No decl change, but dirty data, reload the changed stuff */
 330         start = This->dirtystart;
 331         end = This->dirtyend;
 332     } else {
 333         /* Desc not changed, buffer not dirty, nothing to do :-) */
 334         return;
 335     }
 336
 337     /* Mark the buffer clean */
 338     This->Flags &= ~VBFLAG_DIRTY;
 339     This->dirtystart = 0;
 340     This->dirtyend = 0;
 341
 342     if     (This->strided.u.s.position.dwStride) stride = This->strided.u.s.position.dwStride;
 343     else if(This->strided.u.s.specular.dwStride) stride = This->strided.u.s.specular.dwStride;
 344     else if(This->strided.u.s.diffuse.dwStride)  stride = This->strided.u.s.diffuse.dwStride;
 345     else {
 346         /* That means that there is nothing to fixup. Just upload from This->resource.allocatedMemory
 347          * directly into the vbo. Do not free the system memory copy because drawPrimitive may need it if
 348          * the stride is 0, for instancing emulation, vertex blending emulation or shader emulation.
 349          */
 350         TRACE("No conversion needed, locking directly into the VBO in future\n");
 351
 352         if(!device->isInDraw) {
 353             ActivateContext(device, device->lastActiveRenderTarget, CTXUSAGE_RESOURCELOAD);
 354         }
 355         ENTER_GL();
 356         GL_EXTCALL(glBindBufferARB(GL_ARRAY_BUFFER_ARB, This->vbo));
 357         checkGLcall("glBindBufferARB");
 358         GL_EXTCALL(glBufferSubDataARB(GL_ARRAY_BUFFER_ARB, start, end-start, This->resource.allocatedMemory + start));
 359         checkGLcall("glBufferSubDataARB");
 360         LEAVE_GL();
 361         return;
 362     }
 363
 364     /* OK, we have the original data from the app, the description of the buffer and the dirty area.
 365      * so convert the stuff
 366      */
 367     data = HeapAlloc(GetProcessHeap(), 0, end-start);
 368     if(!data) {
 369         ERR("Out of memory\n");
 370         return;
 371     }
 372     memcpy(data, This->resource.allocatedMemory + start, end - start);
 373
 374     fixup_vertices(data, data, stride, ( end - start) / stride,
 375                    /* Position */
 376                    (int)This->strided.u.s.position.lpData, /* Data location */
 377                    This->strided.u.s.position_transformed, /* Do convert? */
 378                    /* Diffuse color */
 379                    (int)This->strided.u.s.diffuse.lpData, /* Location */
 380                    This->strided.u.s.diffuse.dwType == WINED3DDECLTYPE_SHORT4 || This->strided.u.s.diffuse.dwType == WINED3DDECLTYPE_D3DCOLOR, /* Convert? */
 381                    /* specular color */
 382                    (int)This->strided.u.s.specular.lpData, /* location */
 383                    This->strided.u.s.specular.dwType == WINED3DDECLTYPE_SHORT4 || This->strided.u.s.specular.dwType == WINED3DDECLTYPE_D3DCOLOR);
 384
 385     if(!device->isInDraw) {
 386         ActivateContext(device, device->lastActiveRenderTarget, CTXUSAGE_RESOURCELOAD);
 387     }
 388     ENTER_GL();
 389     GL_EXTCALL(glBindBufferARB(GL_ARRAY_BUFFER_ARB, This->vbo));
 390     checkGLcall("glBindBufferARB");
 391     GL_EXTCALL(glBufferSubDataARB(GL_ARRAY_BUFFER_ARB, start, end - start, data));
 392     checkGLcall("glBufferSubDataARB");
 393     LEAVE_GL();
 394
 395     HeapFree(GetProcessHeap(), 0, data);
 396 }
 397
 398 static WINED3DRESOURCETYPE WINAPI IWineD3DVertexBufferImpl_GetType(IWineD3DVertexBuffer *iface) {
 399     return IWineD3DResourceImpl_GetType((IWineD3DResource *)iface);
 400 }
 401
 402 static HRESULT WINAPI IWineD3DVertexBufferImpl_GetParent(IWineD3DVertexBuffer *iface, IUnknown **pParent) {
 403     return IWineD3DResourceImpl_GetParent((IWineD3DResource *)iface, pParent);
 404 }
 405
 406 /* ******************************************************
 407    IWineD3DVertexBuffer IWineD3DVertexBuffer parts follow
 408    ****************************************************** */
 409 static HRESULT  WINAPI IWineD3DVertexBufferImpl_Lock(IWineD3DVertexBuffer *iface, UINT OffsetToLock, UINT SizeToLock, BYTE** ppbData, DWORD Flags) {
 410     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
 411     BYTE *data;
 412     TRACE("(%p)->%d, %d, %p, %08x\n", This, OffsetToLock, SizeToLock, ppbData, Flags);
 413
 414     InterlockedIncrement(&This->lockcount);
 415
 416     if(This->Flags & VBFLAG_DIRTY) {
 417         if(This->dirtystart > OffsetToLock) This->dirtystart = OffsetToLock;
 418         if(SizeToLock) {
 419             if(This->dirtyend < OffsetToLock + SizeToLock) This->dirtyend = OffsetToLock + SizeToLock;
 420         } else {
 421             This->dirtyend = This->resource.size;
 422         }
 423     } else {
 424         This->dirtystart = OffsetToLock;
 425         if(SizeToLock)
 426             This->dirtyend = OffsetToLock + SizeToLock;
 427         else
 428             This->dirtyend = This->resource.size;
 429     }
 430
 431     data = This->resource.allocatedMemory;
 432     This->Flags |= VBFLAG_DIRTY;
 433     *ppbData = data + OffsetToLock;
 434
 435     TRACE("(%p) : returning memory of %p (base:%p,offset:%u)\n", This, data + OffsetToLock, data, OffsetToLock);
 436     /* TODO: check Flags compatibility with This->currentDesc.Usage (see MSDN) */
 437     return WINED3D_OK;
 438 }
 439 HRESULT  WINAPI IWineD3DVertexBufferImpl_Unlock(IWineD3DVertexBuffer *iface) {
 440     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *) iface;
 441     LONG lockcount;
 442     TRACE("(%p)\n", This);
 443
 444     lockcount = InterlockedDecrement(&This->lockcount);
 445     if(lockcount > 0) {
 446         /* Delay loading the buffer until everything is unlocked */
 447         TRACE("Ignoring the unlock\n");
 448         return WINED3D_OK;
 449     }
 450
 451     if(This->Flags & VBFLAG_HASDESC) {
 452         IWineD3DVertexBufferImpl_PreLoad(iface);
 453     }
 454     return WINED3D_OK;
 455 }
 456 static HRESULT  WINAPI IWineD3DVertexBufferImpl_GetDesc(IWineD3DVertexBuffer *iface, WINED3DVERTEXBUFFER_DESC *pDesc) {
 457     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
 458
 459     TRACE("(%p)\n", This);
 460     pDesc->Format = This->resource.format;
 461     pDesc->Type   = This->resource.resourceType;
 462     pDesc->Usage  = This->resource.usage;
 463     pDesc->Pool   = This->resource.pool;
 464     pDesc->Size   = This->resource.size;
 465     pDesc->FVF    = This->fvf;
 466     return WINED3D_OK;
 467 }
 468
 469 const IWineD3DVertexBufferVtbl IWineD3DVertexBuffer_Vtbl =
 470 {
 471     /* IUnknown */
 472     IWineD3DVertexBufferImpl_QueryInterface,
 473     IWineD3DVertexBufferImpl_AddRef,
 474     IWineD3DVertexBufferImpl_Release,
 475     /* IWineD3DResource */
 476     IWineD3DVertexBufferImpl_GetParent,
 477     IWineD3DVertexBufferImpl_GetDevice,
 478     IWineD3DVertexBufferImpl_SetPrivateData,
 479     IWineD3DVertexBufferImpl_GetPrivateData,
 480     IWineD3DVertexBufferImpl_FreePrivateData,
 481     IWineD3DVertexBufferImpl_SetPriority,
 482     IWineD3DVertexBufferImpl_GetPriority,
 483     IWineD3DVertexBufferImpl_PreLoad,
 484     IWineD3DVertexBufferImpl_GetType,
 485     /* IWineD3DVertexBuffer */
 486     IWineD3DVertexBufferImpl_Lock,
 487     IWineD3DVertexBufferImpl_Unlock,
 488     IWineD3DVertexBufferImpl_GetDesc
 489 };
 490
 491 BYTE* WINAPI IWineD3DVertexBufferImpl_GetMemory(IWineD3DVertexBuffer* iface, DWORD iOffset, GLint *vbo) {
 492     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
 493
 494     *vbo = This->vbo;
 495     if(This->vbo == 0) {
 496         return This->resource.allocatedMemory + iOffset;
 497     } else {
 498         return (BYTE *) iOffset;
 499     }
 500 }
 501
 502 HRESULT WINAPI IWineD3DVertexBufferImpl_ReleaseMemory(IWineD3DVertexBuffer* iface) {
 503   return WINED3D_OK;
 504 }