wined3d: Create the DIB section for DDSCAPS_OWNDC surfaces on initialization.

dlls/ddraw/surface.c

@@ -5273,6 +5273,9 @@ HRESULT ddraw_surface_init(IDirectDrawSurfaceImpl *surface, IDirectDrawImpl *ddr
     if (desc->ddsCaps.dwCaps & DDSCAPS_ZBUFFER)
         usage |= WINED3DUSAGE_DEPTHSTENCIL;
 
+    if (desc->ddsCaps.dwCaps & DDSCAPS_OWNDC)
+        usage |= WINED3DUSAGE_OWNDC;
+
     if (desc->ddsCaps.dwCaps & DDSCAPS_SYSTEMMEMORY)
     {
         pool = WINED3DPOOL_SYSTEMMEM;

dlls/wined3d/surface.c

@@ -7305,6 +7305,17 @@ static HRESULT surface_init(struct wined3d_surface *surface, WINED3DSURFTYPE sur
         return hr;
     }
 
+    /* Similar to lockable rendertargets above, creating the DIB section
+     * during surface initialization prevents the sysmem pointer from changing
+     * after a wined3d_surface_getdc() call. */
+    if ((usage & WINED3DUSAGE_OWNDC) && !surface->hDC
+            && SUCCEEDED(surface_create_dib_section(surface)))
+    {
+        HeapFree(GetProcessHeap(), 0, surface->resource.heapMemory);
+        surface->resource.heapMemory = NULL;
+        surface->resource.allocatedMemory = surface->dib.bitmap_data;
+    }
+
     return hr;
 }
 

include/wine/wined3d.h

@@ -847,6 +847,7 @@ enum wined3d_sysval_semantic
 #define WINED3DUSAGE_AUTOGENMIPMAP                              0x00000400
 #define WINED3DUSAGE_DMAP                                       0x00004000
 #define WINED3DUSAGE_MASK                                       0x00004fff
+#define WINED3DUSAGE_OWNDC                                      0x20000000
 #define WINED3DUSAGE_STATICDECL                                 0x40000000
 #define WINED3DUSAGE_OVERLAY                                    0x80000000