From ad26999d336ed5dd1f9c891d5a31fc59beb87273 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Sun, 24 Dec 2017 15:37:09 -0700 Subject: tgsi: improve comment on tgsi_util_get_shadow_ref_src_index() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Reviewed-by: Marek Olšák Reviewed-by: Neha Bhende Reviewed-by: Charmaine Lee --- src/gallium/auxiliary/tgsi/tgsi_util.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'src/gallium') diff --git a/src/gallium/auxiliary/tgsi/tgsi_util.c b/src/gallium/auxiliary/tgsi/tgsi_util.c index 78a5413b9d7..a78172a8486 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) -- cgit v1.2.3