Re: [PATCH v2 1/4] wined3d: Clear the texture BO when loading textures into WINED3D_LOCATION_BUFFER.

[Henri Verbeet]

On Thu, 21 Apr 2022 at 03:04, Zebediah Figura  wrote:
> -
>    if (current & WINED3D_LOCATION_CLEARED)
> -
>    {
> -
>        map_ptr = wined3d_context_map_bo_address(context, &destination, range.size,
> -
>                WINED3D_MAP_WRITE | WINED3D_MAP_DISCARD);
> -
>        memset(map_ptr, 0, range.size);
> -
>        wined3d_context_unmap_bo_address(context, &destination, 1, &range);
> -
>    }
> -
>    else
> -
>    {
> -
>        wined3d_texture_get_bo_address(texture, sub_resource_idx,
> -
>                &source, (current & wined3d_texture_sysmem_locations));
> -
>        wined3d_context_copy_bo_address(context, &destination, &source, 1, &range);
> -
>    }
>    ret = TRUE;
> }

Unfortunately this crashes in the ddraw/d3d.ok test with the "no3d"
renderer. What happens is that we get called from
wined3d_texture_create_dc() with a NULL context, and then
wined3d_context_map_bo_address() attempts to dereference that.