[Mesa-dev] [PATCH 1/2] tgsi: improve comment on tgsi_util_get_shadow_ref_src_index()

[Marek Olšák]

Reviewed-by: Marek Olšák <marek.olsak at amd.com>

Marek

On Sun, Dec 24, 2017 at 11:40 PM, Brian Paul <brianp at vmware.com> wrote:
> ---
>  src/gallium/auxiliary/tgsi/tgsi_util.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/src/gallium/auxiliary/tgsi/tgsi_util.c b/src/gallium/auxiliary/tgsi/tgsi_util.c
> index 78a5413..a78172a 100644
> --- a/src/gallium/auxiliary/tgsi/tgsi_util.c
> +++ b/src/gallium/auxiliary/tgsi/tgsi_util.c
> @@ -506,8 +506,12 @@ tgsi_util_get_texture_coord_dim(enum tgsi_texture_type tgsi_tex)
>
>
>  /**
> - * Given a TGSI_TEXTURE_x target, return the src register index for the
> - * shadow reference coordinate.
> + * Given a TGSI_TEXTURE_x target, return register component where the
> + * shadow reference/distance coordinate is found.  Typically, components
> + * 0 and 1 are the (s,t) texcoords and component 2 or 3 hold the shadow
> + * reference value.  But if we return 4, it means the reference value is
> + * found in the 0th component of the second coordinate argument to the
> + * TEX2 instruction.
>   */
>  int
>  tgsi_util_get_shadow_ref_src_index(enum tgsi_texture_type tgsi_tex)
> --
> 1.9.1
>
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