d3d8: Hold a reference to the wined3d swapchain from d3d8 swapchain surfaces.

dlls/d3d8/d3d8_private.h

@@ -199,6 +199,7 @@ struct d3d8_surface
     IDirect3DDevice8 *parent_device;
     IUnknown *container;
     struct d3d8_texture *texture;
+    struct wined3d_swapchain *swapchain;
 };
 
 struct wined3d_rendertarget_view *d3d8_surface_acquire_rendertarget_view(struct d3d8_surface *surface) DECLSPEC_HIDDEN;

dlls/d3d8/surface.c

@@ -69,6 +69,8 @@ static ULONG WINAPI d3d8_surface_AddRef(IDirect3DSurface8 *iface)
         if (surface->wined3d_rtv)
             wined3d_rendertarget_view_incref(surface->wined3d_rtv);
         wined3d_texture_incref(surface->wined3d_texture);
+        if (surface->swapchain)
+            wined3d_swapchain_incref(surface->swapchain);
     }
 
     return refcount;
@@ -102,6 +104,10 @@ static ULONG WINAPI d3d8_surface_Release(IDirect3DSurface8 *iface)
 
         if (surface->wined3d_rtv)
             wined3d_rendertarget_view_decref(surface->wined3d_rtv);
+        if (surface->swapchain)
+           wined3d_swapchain_decref(surface->swapchain);
+        /* Releasing the texture may free the d3d8 object, so do not access it
+         * after releasing the texture. */
         wined3d_texture_decref(surface->wined3d_texture);
 
         if (parent_device)
@@ -325,6 +331,7 @@ struct d3d8_surface *d3d8_surface_create(struct wined3d_texture *wined3d_texture
     surface->container = container;
     surface->wined3d_texture = wined3d_texture;
     surface->sub_resource_idx = sub_resource_idx;
+    surface->swapchain = wined3d_texture_get_swapchain(wined3d_texture);
 
     if (surface->container && SUCCEEDED(IUnknown_QueryInterface(surface->container,
             &IID_IDirect3DBaseTexture8, (void **)&texture)))