Re: [PATCH v3 5/6] d3d9: Don't upload unused system memory vertex buffers.

[Henri Verbeet]

On Wed, 27 Feb 2019 at 21:01, Matteo Bruni <mbruni(a)codeweavers.com> wrote:
> +    decl = wined3d_vertex_declaration_get_parent(wined3d_decl);
> +    if (!decl->elements)
> +    {
> +        map = 1;
> +    }
> Can that happen in d3d9?
> +    else
> +    {
> +        map = 0;
> +        if (FAILED(convert_to_wined3d_declaration(decl->elements, &elements, &count)))
> +            return;
> +        for (i = 0; i < count; ++i)
> +            map |= 1u << elements[i].input_slot;
> +        heap_free(elements);
> +    }
> You don't need to convert the elements for that, the d3d9 elements
> have a "Stream" field too. If you wanted to be efficient about it, you
> could create the declaration's stream map on declaration creation.