[Mesa-dev] [PATCH] st/mesa: skip draw calls with pipe_draw_info::count == 0

[Marek Olšák]

Ping.

On Sat, Sep 2, 2017 at 1:34 AM, Marek Olšák <maraeo at gmail.com> wrote:
> From: Marek Olšák <marek.olsak at amd.com>
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102502
>
> Cc: 17.2 <mesa-stable at lists.freedesktop.org>
> ---
>  src/mesa/state_tracker/st_draw.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
> index fe03a4a..2fe7070 100644
> --- a/src/mesa/state_tracker/st_draw.c
> +++ b/src/mesa/state_tracker/st_draw.c
> @@ -191,23 +191,28 @@ st_draw_vbo(struct gl_context *ctx,
>        if (tfb_vertcount) {
>           if (!st_transform_feedback_draw_init(tfb_vertcount, stream, &info))
>              return;
>        }
>     }
>
>     assert(!indirect);
>
>     /* do actual drawing */
>     for (i = 0; i < nr_prims; i++) {
> +      info.count = prims[i].count;
> +
> +      /* Skip no-op draw calls. */
> +      if (!info.count && !tfb_vertcount)
> +         continue;
> +
>        info.mode = translate_prim(ctx, prims[i].mode);
>        info.start = start + prims[i].start;
> -      info.count = prims[i].count;
>        info.start_instance = prims[i].base_instance;
>        info.instance_count = prims[i].num_instances;
>        info.index_bias = prims[i].basevertex;
>        info.drawid = prims[i].draw_id;
>        if (!ib) {
>           info.min_index = info.start;
>           info.max_index = info.start + info.count - 1;
>        }
>
>        if (ST_DEBUG & DEBUG_DRAW) {
> --
> 2.7.4
>