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 ((IWineD3DImpl *)(((IWineD3DDeviceImpl *)This->resource.wineD3DDevice)->wineD3D))->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             ENTER_GL();
  66             GL_EXTCALL(glDeleteBuffersARB(1, &This->vbo));
  67             checkGLcall("glDeleteBuffersARB");
  68             LEAVE_GL();
  69         }
  70
  71         IWineD3DResourceImpl_CleanUp((IWineD3DResource *)iface);
  72         HeapFree(GetProcessHeap(), 0, This);
  73     }
  74     return ref;
  75 }
  76
  77 /* ****************************************************
  78    IWineD3DVertexBuffer IWineD3DResource parts follow
  79    **************************************************** */
  80 static HRESULT WINAPI IWineD3DVertexBufferImpl_GetDevice(IWineD3DVertexBuffer *iface, IWineD3DDevice** ppDevice) {
  81     return IWineD3DResourceImpl_GetDevice((IWineD3DResource *)iface, ppDevice);
  82 }
  83
  84 static HRESULT WINAPI IWineD3DVertexBufferImpl_SetPrivateData(IWineD3DVertexBuffer *iface, REFGUID refguid, CONST void* pData, DWORD SizeOfData, DWORD Flags) {
  85     return IWineD3DResourceImpl_SetPrivateData((IWineD3DResource *)iface, refguid, pData, SizeOfData, Flags);
  86 }
  87
  88 static HRESULT WINAPI IWineD3DVertexBufferImpl_GetPrivateData(IWineD3DVertexBuffer *iface, REFGUID refguid, void* pData, DWORD* pSizeOfData) {
  89     return IWineD3DResourceImpl_GetPrivateData((IWineD3DResource *)iface, refguid, pData, pSizeOfData);
  90 }
  91
  92 static HRESULT WINAPI IWineD3DVertexBufferImpl_FreePrivateData(IWineD3DVertexBuffer *iface, REFGUID refguid) {
  93     return IWineD3DResourceImpl_FreePrivateData((IWineD3DResource *)iface, refguid);
  94 }
  95
  96 static DWORD    WINAPI IWineD3DVertexBufferImpl_SetPriority(IWineD3DVertexBuffer *iface, DWORD PriorityNew) {
  97     return IWineD3DResourceImpl_SetPriority((IWineD3DResource *)iface, PriorityNew);
  98 }
  99
 100 static DWORD    WINAPI IWineD3DVertexBufferImpl_GetPriority(IWineD3DVertexBuffer *iface) {
 101     return IWineD3DResourceImpl_GetPriority((IWineD3DResource *)iface);
 102 }
 103
 104 static void fixup_vertices(BYTE *src, BYTE *dst, int stride, int num, BYTE *pos, BOOL haspos, BYTE *diffuse, BOOL hasdiffuse, BYTE *specular, BOOL hasspecular) {
 105     int i;
 106     float x, y, z, w;
 107
 108     for(i = num - 1; i >= 0; i--) {
 109         if(haspos) {
 110             float *p = (float *) (((int) src + (int) pos) + i * stride);
 111
 112             /* rhw conversion like in drawStridedSlow */
 113             if(p[3] == 1.0 || ((p[3] < eps) && (p[3] > -eps))) {
 114                 x = p[0];
 115                 y = p[1];
 116                 z = p[2];
 117                 w = 1.0;
 118             } else {
 119                 w = 1.0 / p[3];
 120                 x = p[0] * w;
 121                 y = p[1] * w;
 122                 z = p[2] * w;
 123             }
 124             p = (float *) ((int) dst + i * stride + (int) pos);
 125             p[0] = x;
 126             p[1] = y;
 127             p[2] = z;
 128             p[3] = w;
 129         }
 130         if(hasdiffuse) {
 131             DWORD srcColor, *dstColor = (DWORD *) (dst + i * stride + (int) diffuse);
 132             srcColor = * (DWORD *) ( ((int) src + (int) diffuse) + i * stride);
 133
 134             /* Color conversion like in drawStridedSlow. watch out for little endianity
 135             * If we want that stuff to work on big endian machines too we have to consider more things
 136             *
 137             * 0xff000000: Alpha mask
 138             * 0x00ff0000: Blue mask
 139             * 0x0000ff00: Green mask
 140             * 0x000000ff: Red mask
 141             */
 142
 143             *dstColor = 0;
 144             *dstColor |= (srcColor & 0xff00ff00)      ;   /* Alpha Green */
 145             *dstColor |= (srcColor & 0x00ff0000) >> 16;   /* Red */
 146             *dstColor |= (srcColor & 0x000000ff) << 16;   /* Blue */
 147         }
 148         if(hasspecular) {
 149             DWORD srcColor, *dstColor = (DWORD *) (dst + i * stride + (int) specular);
 150             srcColor = * (DWORD *) ( ((int) src + (int) specular) + i * stride);
 151
 152             /* Similar to diffuse
 153              * TODO: Write the alpha value out for fog coords
 154              */
 155             *dstColor = 0;
 156             *dstColor |= (srcColor & 0xff00ff00)      ;   /* Alpha Green */
 157             *dstColor |= (srcColor & 0x00ff0000) >> 16;   /* Red */
 158             *dstColor |= (srcColor & 0x000000ff) << 16;   /* Blue */
 159         }
 160     }
 161 }
 162
 163 inline BOOL WINAPI IWineD3DVertexBufferImpl_FindDecl(IWineD3DVertexBufferImpl *This)
 164 {
 165     WineDirect3DVertexStridedData strided;
 166     IWineD3DDeviceImpl *device = This->resource.wineD3DDevice;
 167     BOOL ret;
 168
 169     memset(&strided, 0, sizeof(strided));
 170     /* There are certain vertex data types that need to be fixed up. The Vertex Buffers FVF doesn't
 171      * help finding them, only the vertex declaration or the device FVF can determine that at drawPrim
 172      * time. Rules are as follows:
 173      *
 174      * -> No modification when Vertex Shaders are used
 175      * -> Fix up position1 and position 2 if they are XYZRHW
 176      * -> Fix up diffuse color
 177      * -> Fix up specular color
 178      *
 179      * The Declaration is only known at drawing time, and it can change from draw to draw. If any converted values
 180      * are changed, the whole buffer has to be reconverted and reloaded. (Converting is SLOW, so if this happens too
 181      * often PreLoad stops converting entirely and falls back to drawStridedSlow).
 182      *
 183      * Reconvert if:
 184      * -> New semantics that have to be converted appear
 185      * -> The position of semantics that have to be converted changes
 186      * -> The stride of the vertex changed AND there is stuff that needs conversion
 187      * -> (If a vertex buffer is bound and in use assume that nothing that needs conversion is there)
 188      *
 189      * Return values:
 190      *  TRUE: Reload is needed
 191      *  FALSE: otherwise
 192      */
 193
 194     if(device->stateBlock->vertexShader != NULL && wined3d_settings.vs_mode != VS_NONE
 195        &&((IWineD3DVertexShaderImpl *)device->stateBlock->vertexShader)->baseShader.function != NULL
 196        && GL_SUPPORT(ARB_VERTEX_PROGRAM)) {
 197         /* Case 1: Vertex Shader: No conversion */
 198         TRACE("Vertex Shader, no conversion needed\n");
 199     } else if(device->stateBlock->vertexDecl || device->stateBlock->vertexShader) {
 200         /* Case 2: Vertex Declaration */
 201         TRACE("Using vertex declaration\n");
 202
 203         This->Flags |= VBFLAG_LOAD;
 204         primitiveDeclarationConvertToStridedData((IWineD3DDevice *) device,
 205                 FALSE,
 206                 &strided,
 207                 0,
 208                 &ret /* buffer contains fixed data, ignored here */);
 209         This->Flags &= ~VBFLAG_LOAD;
 210
 211     } else {
 212         /* Case 3: FVF */
 213         if(!(This->Flags & VBFLAG_STREAM) ) {
 214             TRACE("No vertex decl used and buffer is not bound to a stream\n");
 215             /* No reload needed */
 216             return FALSE;
 217         } else {
 218             This->Flags |= VBFLAG_LOAD;
 219             primitiveConvertFVFtoOffset(device->stateBlock->fvf,
 220                                         device->stateBlock->streamStride[This->stream],
 221                                         NULL,
 222                                         &strided,
 223                                         This->vbo);
 224             This->Flags &= ~VBFLAG_LOAD;
 225             /* Data can only come from this buffer */
 226         }
 227     }
 228
 229     /* Filter out data that does not come from this VBO */
 230     if(strided.u.s.position.VBO != This->vbo)    memset(&strided.u.s.position, 0, sizeof(strided.u.s.position));
 231     if(strided.u.s.diffuse.VBO != This->vbo)     memset(&strided.u.s.diffuse, 0, sizeof(strided.u.s.diffuse));
 232     if(strided.u.s.specular.VBO != This->vbo)    memset(&strided.u.s.specular, 0, sizeof(strided.u.s.specular));
 233     if(strided.u.s.position2.VBO != This->vbo)   memset(&strided.u.s.position2, 0, sizeof(strided.u.s.position2));
 234
 235     /* We have a declaration now in the buffer */
 236     This->Flags |= VBFLAG_HASDESC;
 237
 238     /* Find out if reload is needed
 239      * 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.
 240      *
 241      * 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
 242      * and does not exist now all 3 values will be equal(=0).
 243      *
 244      * 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
 245      * 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
 246      * buffers at the same time and get the position from one and the color from the other buffer.
 247      */
 248     if( /* Position transformed vs untransformed */
 249         ((This->strided.u.s.position_transformed || strided.u.s.position_transformed) &&
 250           This->strided.u.s.position.lpData != strided.u.s.position.lpData) ||
 251         /* Diffuse position and data type */
 252         This->strided.u.s.diffuse.lpData != strided.u.s.diffuse.lpData || This->strided.u.s.diffuse.dwStride != strided.u.s.diffuse.dwStride ||
 253          This->strided.u.s.diffuse.dwType != strided.u.s.diffuse.dwType ||
 254         /* Specular position and data type */
 255         This->strided.u.s.specular.lpData != strided.u.s.specular.lpData || This->strided.u.s.specular.dwStride != strided.u.s.specular.dwStride ||
 256          This->strided.u.s.specular.dwType != strided.u.s.specular.dwType) {
 257
 258         TRACE("Declaration changed, reloading buffer\n");
 259         /* Set the new description */
 260         memcpy(&This->strided, &strided, sizeof(strided));
 261         return TRUE;
 262     }
 263
 264     return FALSE;
 265 }
 266
 267 static void     WINAPI IWineD3DVertexBufferImpl_PreLoad(IWineD3DVertexBuffer *iface) {
 268     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *) iface;
 269     BYTE *data;
 270     UINT start = 0, end = 0, stride = 0;
 271     BOOL declChanged = FALSE;
 272     TRACE("(%p)->()\n", This);
 273
 274     if(This->Flags & VBFLAG_LOAD) {
 275         return; /* Already doing that stuff */
 276     }
 277
 278     if(!This->vbo) {
 279         /* TODO: Make converting independent from VBOs */
 280         return; /* Not doing any conversion */
 281     }
 282
 283     declChanged = IWineD3DVertexBufferImpl_FindDecl(This);
 284
 285     /* If applications change the declaration over and over, reconverting all the time is a huge
 286      * performance hit. So count the declaration changes and release the VBO if there are too much
 287      * of them(and thus stop converting)
 288      */
 289     if(declChanged) {
 290         This->declChanges++;
 291         This->draws = 0;
 292
 293         if(This->declChanges > VB_MAXDECLCHANGES) {
 294             if(This->resource.allocatedMemory) {
 295                 FIXME("Too much declaration changes, stopping converting\n");
 296                 ENTER_GL();
 297                 GL_EXTCALL(glDeleteBuffersARB(1, &This->vbo));
 298                 checkGLcall("glDeleteBuffersARB");
 299                 LEAVE_GL();
 300                 This->vbo = 0;
 301                 return;
 302             }
 303             /* Otherwise do not bother to release the VBO. If we're doing direct locking now,
 304              * and the declarations changed the code below will fetch the VBO's contents, convert
 305              * and on the next decl change the data will be in sysmem too and we can just release the VBO
 306              */
 307         }
 308     } else {
 309         /* However, it is perfectly fine to change the declaration every now and then. We don't want a game that
 310          * changes it every minute drop the VBO after VB_MAX_DECL_CHANGES minutes. So count draws without
 311          * decl changes and reset the decl change count after a specific number of them
 312          */
 313         This->draws++;
 314         if(This->draws > VB_RESETDECLCHANGE) This->declChanges = 0;
 315     }
 316
 317     if(declChanged) {
 318         /* The declaration changed, reload the whole buffer */
 319         WARN("Reloading buffer because of decl change\n");
 320         start = 0;
 321         end = This->resource.size;
 322     } else if(This->Flags & VBFLAG_DIRTY) {
 323         /* No decl change, but dirty data, reload the changed stuff */
 324         start = This->dirtystart;
 325         end = This->dirtyend;
 326     } else {
 327         /* Desc not changed, buffer not dirty, nothing to do :-) */
 328         return;
 329     }
 330
 331     /* Mark the buffer clean */
 332     This->Flags &= ~VBFLAG_DIRTY;
 333     This->dirtystart = 0;
 334     This->dirtyend = 0;
 335
 336     /* If there was no conversion done before, then resource.allocatedMemory does not exist
 337      * because locking was done directly into the VBO. In this case get the data out
 338      */
 339     if(declChanged && !This->resource.allocatedMemory) {
 340
 341         This->resource.allocatedMemory = HeapAlloc(GetProcessHeap(), 0, This->resource.size);
 342         if(!This->resource.allocatedMemory) {
 343             ERR("Out of memory when allocating memory for a vertex buffer\n");
 344             return;
 345         }
 346         ERR("Was locking directly into the VBO, reading data back because conv is needed\n");
 347
 348         ENTER_GL();
 349         GL_EXTCALL(glBindBufferARB(GL_ARRAY_BUFFER_ARB, This->vbo));
 350         checkGLcall("glBindBufferARB");
 351         data = GL_EXTCALL(glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_READ_WRITE_ARB));
 352         if(!data) {
 353             ERR("glMapBuffer failed!\n");
 354             LEAVE_GL();
 355             return;
 356         }
 357         memcpy(This->resource.allocatedMemory, data, This->resource.size);
 358         GL_EXTCALL(glUnmapBufferARB(GL_ARRAY_BUFFER_ARB));
 359         checkGLcall("glUnmapBufferARB");
 360         LEAVE_GL();
 361     }
 362
 363     if     (This->strided.u.s.position.dwStride) stride = This->strided.u.s.position.dwStride;
 364     else if(This->strided.u.s.specular.dwStride) stride = This->strided.u.s.specular.dwStride;
 365     else if(This->strided.u.s.diffuse.dwStride)  stride = This->strided.u.s.diffuse.dwStride;
 366     else {
 367         /* That means that there is nothing to fixup. Upload everything into the VBO and
 368          * free This->resource.allocatedMemory
 369          */
 370         TRACE("No conversion needed, locking directly into the VBO in future\n");
 371
 372         ENTER_GL();
 373         GL_EXTCALL(glBindBufferARB(GL_ARRAY_BUFFER_ARB, This->vbo));
 374         checkGLcall("glBindBufferARB");
 375         GL_EXTCALL(glBufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, This->resource.size, This->resource.allocatedMemory));
 376         checkGLcall("glBufferSubDataARB");
 377         LEAVE_GL();
 378         return;
 379     }
 380
 381     /* OK, we have the original data from the app, the description of the buffer and the dirty area.
 382      * so convert the stuff
 383      */
 384     data = HeapAlloc(GetProcessHeap(), 0, end-start);
 385     if(!data) {
 386         ERR("Out of memory\n");
 387         return;
 388     }
 389     memcpy(data, This->resource.allocatedMemory + start, end - start);
 390
 391     fixup_vertices(data, data, stride, ( end - start) / stride,
 392                    /* Position */
 393                    This->strided.u.s.position.lpData, /* Data location */
 394                    This->strided.u.s.position_transformed, /* Do convert? */
 395                    /* Diffuse color */
 396                    This->strided.u.s.diffuse.lpData, /* Location */
 397                    This->strided.u.s.diffuse.dwType == WINED3DDECLTYPE_SHORT4 || This->strided.u.s.diffuse.dwType == WINED3DDECLTYPE_D3DCOLOR, /* Convert? */
 398                    /* specular color */
 399                    This->strided.u.s.specular.lpData, /* location */
 400                    This->strided.u.s.specular.dwType == WINED3DDECLTYPE_SHORT4 || This->strided.u.s.specular.dwType == WINED3DDECLTYPE_D3DCOLOR);
 401
 402     ENTER_GL();
 403     GL_EXTCALL(glBindBufferARB(GL_ARRAY_BUFFER_ARB, This->vbo));
 404     checkGLcall("glBindBufferARB");
 405     GL_EXTCALL(glBufferSubDataARB(GL_ARRAY_BUFFER_ARB, start, end - start, data));
 406     checkGLcall("glBufferSubDataARB");
 407     LEAVE_GL();
 408
 409     HeapFree(GetProcessHeap(), 0, data);
 410 }
 411
 412 static WINED3DRESOURCETYPE WINAPI IWineD3DVertexBufferImpl_GetType(IWineD3DVertexBuffer *iface) {
 413     return IWineD3DResourceImpl_GetType((IWineD3DResource *)iface);
 414 }
 415
 416 static HRESULT WINAPI IWineD3DVertexBufferImpl_GetParent(IWineD3DVertexBuffer *iface, IUnknown **pParent) {
 417     return IWineD3DResourceImpl_GetParent((IWineD3DResource *)iface, pParent);
 418 }
 419
 420 /* ******************************************************
 421    IWineD3DVertexBuffer IWineD3DVertexBuffer parts follow
 422    ****************************************************** */
 423 static HRESULT  WINAPI IWineD3DVertexBufferImpl_Lock(IWineD3DVertexBuffer *iface, UINT OffsetToLock, UINT SizeToLock, BYTE** ppbData, DWORD Flags) {
 424     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
 425     BYTE *data;
 426     TRACE("(%p)->%d, %d, %p, %08x\n", This, OffsetToLock, SizeToLock, ppbData, Flags);
 427
 428     InterlockedIncrement(&This->lockcount);
 429
 430     if(This->Flags & VBFLAG_DIRTY) {
 431         if(This->dirtystart > OffsetToLock) This->dirtystart = OffsetToLock;
 432         if(SizeToLock) {
 433             if(This->dirtyend < OffsetToLock + SizeToLock) This->dirtyend = OffsetToLock + SizeToLock;
 434         } else {
 435             This->dirtyend = This->resource.size;
 436         }
 437     } else {
 438         This->dirtystart = OffsetToLock;
 439         if(SizeToLock)
 440             This->dirtyend = OffsetToLock + SizeToLock;
 441         else
 442             This->dirtyend = OffsetToLock + This->resource.size;
 443     }
 444
 445     if(This->resource.allocatedMemory) {
 446           data = This->resource.allocatedMemory;
 447           This->Flags |= VBFLAG_DIRTY;
 448     } else {
 449         GLenum mode = GL_READ_WRITE_ARB;
 450         /* Return data to the VBO */
 451
 452         TRACE("Locking directly into the buffer\n");
 453
 454         if((This->resource.usage & WINED3DUSAGE_WRITEONLY) || ( Flags & WINED3DLOCK_DISCARD) ) {
 455             mode = GL_WRITE_ONLY_ARB;
 456         } else if( Flags & (WINED3DLOCK_READONLY | WINED3DLOCK_NO_DIRTY_UPDATE) ) {
 457             mode = GL_READ_ONLY_ARB;
 458         }
 459
 460         ENTER_GL();
 461         GL_EXTCALL(glBindBufferARB(GL_ARRAY_BUFFER_ARB, This->vbo));
 462         checkGLcall("glBindBufferARB");
 463         data = GL_EXTCALL(glMapBufferARB(GL_ARRAY_BUFFER_ARB, mode));
 464         LEAVE_GL();
 465         if(!data) {
 466             ERR("glMapBuffer failed\n");
 467             return WINED3DERR_INVALIDCALL;
 468         }
 469     }
 470     *ppbData = data + OffsetToLock;
 471
 472     TRACE("(%p) : returning memory of %p (base:%p,offset:%u)\n", This, data + OffsetToLock, data, OffsetToLock);
 473     /* TODO: check Flags compatibility with This->currentDesc.Usage (see MSDN) */
 474     return WINED3D_OK;
 475 }
 476 HRESULT  WINAPI IWineD3DVertexBufferImpl_Unlock(IWineD3DVertexBuffer *iface) {
 477     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *) iface;
 478     LONG lockcount;
 479     TRACE("(%p)\n", This);
 480
 481     lockcount = InterlockedDecrement(&This->lockcount);
 482     if(lockcount > 0) {
 483         /* Delay loading the buffer until everything is unlocked */
 484         TRACE("Ignoring the unlock\n");
 485         return D3D_OK;
 486     }
 487
 488     if(!This->resource.allocatedMemory) {
 489         ENTER_GL();
 490         GL_EXTCALL(glBindBufferARB(GL_ARRAY_BUFFER_ARB, This->vbo));
 491         checkGLcall("glBindBufferARB");
 492         GL_EXTCALL(glUnmapBufferARB(GL_ARRAY_BUFFER_ARB));
 493         checkGLcall("glUnmapBufferARB");
 494         LEAVE_GL();
 495     } else if(This->Flags & VBFLAG_HASDESC){
 496         IWineD3DVertexBufferImpl_PreLoad(iface);
 497     }
 498     return WINED3D_OK;
 499 }
 500 static HRESULT  WINAPI IWineD3DVertexBufferImpl_GetDesc(IWineD3DVertexBuffer *iface, WINED3DVERTEXBUFFER_DESC *pDesc) {
 501     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
 502
 503     TRACE("(%p)\n", This);
 504     pDesc->Format = This->resource.format;
 505     pDesc->Type   = This->resource.resourceType;
 506     pDesc->Usage  = This->resource.usage;
 507     pDesc->Pool   = This->resource.pool;
 508     pDesc->Size   = This->resource.size;
 509     pDesc->FVF    = This->fvf;
 510     return WINED3D_OK;
 511 }
 512
 513 const IWineD3DVertexBufferVtbl IWineD3DVertexBuffer_Vtbl =
 514 {
 515     /* IUnknown */
 516     IWineD3DVertexBufferImpl_QueryInterface,
 517     IWineD3DVertexBufferImpl_AddRef,
 518     IWineD3DVertexBufferImpl_Release,
 519     /* IWineD3DResource */
 520     IWineD3DVertexBufferImpl_GetParent,
 521     IWineD3DVertexBufferImpl_GetDevice,
 522     IWineD3DVertexBufferImpl_SetPrivateData,
 523     IWineD3DVertexBufferImpl_GetPrivateData,
 524     IWineD3DVertexBufferImpl_FreePrivateData,
 525     IWineD3DVertexBufferImpl_SetPriority,
 526     IWineD3DVertexBufferImpl_GetPriority,
 527     IWineD3DVertexBufferImpl_PreLoad,
 528     IWineD3DVertexBufferImpl_GetType,
 529     /* IWineD3DVertexBuffer */
 530     IWineD3DVertexBufferImpl_Lock,
 531     IWineD3DVertexBufferImpl_Unlock,
 532     IWineD3DVertexBufferImpl_GetDesc
 533 };
 534
 535 BYTE* WINAPI IWineD3DVertexBufferImpl_GetMemory(IWineD3DVertexBuffer* iface, DWORD iOffset, GLint *vbo) {
 536     IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
 537
 538     *vbo = This->vbo;
 539     if(This->vbo == 0) {
 540         return This->resource.allocatedMemory + iOffset;
 541     } else {
 542         return (BYTE *) iOffset;
 543     }
 544 }
 545
 546 HRESULT WINAPI IWineD3DVertexBufferImpl_ReleaseMemory(IWineD3DVertexBuffer* iface) {
 547   return WINED3D_OK;
 548 }