From: Brian Paul Date: Sun, 24 Dec 2017 22:37:09 +0000 (-0700) Subject: tgsi: improve comment on tgsi_util_get_shadow_ref_src_index() X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ad26999d336ed5dd1f9c891d5a31fc59beb87273;p=mesa.git tgsi: improve comment on tgsi_util_get_shadow_ref_src_index() Reviewed-by: Marek Olšák Reviewed-by: Neha Bhende Reviewed-by: Charmaine Lee --- 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)