[Mesa-dev] [PATCH] draw: don't crash if GS doesn't emit anything

[Brian Paul]

On 04/27/2013 06:57 AM, Zack Rusin wrote:
> Technically it's legal for geometry shader to not emit any
> vertices. It's silly, but perfectly legal, so lets make draw
> stop crashing if it happens.
>
> Signed-off-by: Zack Rusin<zackr at vmware.com>
> ---
>   src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline.c     |    9 +++++++++
>   .../auxiliary/draw/draw_pt_fetch_shade_pipeline_llvm.c        |    9 +++++++++
>   2 files changed, 18 insertions(+)
>
> diff --git a/src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline.c b/src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline.c
> index 7b871c2..8d66c88 100644
> --- a/src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline.c
> +++ b/src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline.c
> @@ -299,6 +299,15 @@ static void fetch_pipeline_generic( struct draw_pt_middle_end *middle,
>            }
>         }
>      }
> +   if (prim_info->count == 0) {
> +      debug_printf("GS/IA didn't emit any vertices!\n");

What is "IA"?

-Brian