wined3d: Index buffer fixes.

dlls/ddraw/device.c

@@ -3691,7 +3691,7 @@ IDirect3DDeviceImpl_7_DrawIndexedPrimitiveVB(IDirect3DDevice7 *iface,
      */
     hr = IWineD3DIndexBuffer_Lock(This->indexbuffer,
                                   0 /* OffSetToLock */,
-                                  0 /* SizeToLock - doesn't matter */,
+                                  IndexCount * sizeof(WORD),
                                   (BYTE **) &LockedIndices,
                                   0 /* Flags */);
     assert(IndexCount < 0x100000);

dlls/ddraw/direct3d.c

@@ -804,7 +804,7 @@ IDirect3DImpl_7_CreateDevice(IDirect3D7 *iface,
      */
     hr = IWineD3DDevice_CreateIndexBuffer(This->wineD3DDevice,
                                           0x40000, /* Length. Don't know how long it should be */
-                                          0, /* Usage */
+                                          WINED3DUSAGE_DYNAMIC, /* Usage */
                                           WINED3DFMT_INDEX16, /* Format. D3D7 uses WORDS */
                                           WINED3DPOOL_DEFAULT,
                                           &object->indexbuffer,

dlls/wined3d/device.c

@@ -4294,7 +4294,7 @@ static HRESULT  WINAPI  IWineD3DDeviceImpl_DrawIndexedPrimitive(IWineD3DDevice *
     UINT                 idxStride = 2;
     IWineD3DIndexBuffer *pIB;
     WINED3DINDEXBUFFER_DESC  IdxBufDsc;
-    GLint vbo;
+    GLuint vbo;
 
     pIB = This->stateBlock->pIndexData;
     This->stateBlock->streamIsUP = FALSE;

dlls/wined3d/indexbuffer.c

@@ -60,8 +60,11 @@ static ULONG WINAPI IWineD3DIndexBufferImpl_Release(IWineD3DIndexBuffer *iface)
     if (ref == 0) {
         if(This->vbo) {
             ENTER_GL();
-            GL_EXTCALL(glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0));
-            checkGLcall("glBindBufferARB");
+            /* No need to manually unset the buffer. glDeleteBuffers unsets it for the current context,
+             * but not for other contexts. However, because the d3d buffer is destroyed the app has to
+             * unset it before doing the next draw, thus dirtifying the index buffer state and forcing
+             * binding a new buffer
+             */
             GL_EXTCALL(glDeleteBuffersARB(1, &This->vbo));
             checkGLcall("glDeleteBuffersARB");
             LEAVE_GL();
@@ -159,6 +162,8 @@ static HRESULT WINAPI IWineD3DIndexBufferImpl_Unlock(IWineD3DIndexBuffer *iface)
         LEAVE_GL();
         This->dirtystart = 0;
         This->dirtyend = 0;
+        /* TODO: Move loading into preload when the buffer is used, that avoids dirtifying the state */
+        IWineD3DDeviceImpl_MarkStateDirty(This->resource.wineD3DDevice, STATE_INDEXBUFFER);
     }
     return WINED3D_OK;
 }