[Mesa-dev] [PATCH 1/2] util/prim: fix decomposed counts for adjacency primitives

[Brian Paul]

On 04/18/2013 04:16 AM, Zack Rusin wrote:
>
> Signed-off-by: Zack Rusin<zackr at vmware.com>
> ---
>   src/gallium/auxiliary/util/u_prim.h |    8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/src/gallium/auxiliary/util/u_prim.h b/src/gallium/auxiliary/util/u_prim.h
> index 99bb66c..507d12e 100644
> --- a/src/gallium/auxiliary/util/u_prim.h
> +++ b/src/gallium/auxiliary/util/u_prim.h
> @@ -190,13 +190,13 @@ u_decomposed_prims_for_vertices(int primitive, int vertices)
>      case PIPE_PRIM_TRIANGLE_FAN:
>         return (vertices>  2) ? vertices - 2 : 0;
>      case PIPE_PRIM_LINES_ADJACENCY:
> -      return vertices / 2;
> +      return vertices / 4;
>      case PIPE_PRIM_LINE_STRIP_ADJACENCY:
> -      return (vertices>  1) ? vertices - 1 : 0;
> +      return (vertices>  3) ? vertices - 3 : 0;
>      case PIPE_PRIM_TRIANGLES_ADJACENCY:
> -      return vertices / 3;
> +      return vertices / 6;
>      case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY:
> -      return (vertices>  2) ? vertices - 2 : 0;
> +      return (vertices>  5) ? 1 + (vertices - 6)/2 : 0;
>      case PIPE_PRIM_QUADS:
>         return vertices / 4;
>      case PIPE_PRIM_QUAD_STRIP:

Reviewed-by: Brian Paul <brianp at vmware.com>