On Fri, Jul 25, 2014 at 9:30 PM, Marek Olšák <mar...@gmail.com> wrote:
> From: Marek Olšák <marek.ol...@amd.com>
>
> This is needed by the following commit which is a candidate for stable too.
>
> Cc: mesa-sta...@lists.freedesktop.org
> ---
> src/gallium/auxiliary/util/u_prim.h | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>
> diff --git a/src/gallium/auxiliary/util/u_prim.h
> b/src/gallium/auxiliary/util/u_prim.h
> index fd95c0b..cf1a18f 100644
> --- a/src/gallium/auxiliary/util/u_prim.h
> +++ b/src/gallium/auxiliary/util/u_prim.h
> @@ -136,6 +136,21 @@ u_prim_vertex_count(unsigned prim)
> return (likely(prim < PIPE_PRIM_MAX)) ? &prim_table[prim] : NULL;
> }
>
> +/**
> + * Given a vertex count, return the number of primitives.
> + * For polygons, return the number of triangles.
> + */
> +static INLINE unsigned
> +u_prims_for_vertices(unsigned prim, unsigned num)
This isn't an issue yet, but with PATCH primitives, the number of
vertices per primitive will be variable. (I guess it depends on the
stage you're at...) In my patches, I'm passing the number of patch
vertices via pipe_draw_info -- perhaps it would make sense to just
take that as an argument?
> +{
> + const struct u_prim_vertex_count *info = u_prim_vertex_count(prim);
> +
> + if (num < info->min)
> + return 0;
> +
> + return 1 + ((num - info->min) / info->incr);
> +}
> +
> static INLINE boolean u_validate_pipe_prim( unsigned pipe_prim, unsigned nr )
> {
> const struct u_prim_vertex_count *count = u_prim_vertex_count(pipe_prim);
> --
> 1.9.1
>
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