diff options
author | Brian Paul <[email protected]> | 2017-12-24 15:37:09 -0700 |
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committer | Brian Paul <[email protected]> | 2017-12-26 21:44:33 -0700 |
commit | ad26999d336ed5dd1f9c891d5a31fc59beb87273 (patch) | |
tree | 48ad236ff3627624acea3dc5838df50c8d9bbe6e /src/gallium | |
parent | 8571506e51fc977b03807d8c207eae0218e43819 (diff) |
tgsi: improve comment on tgsi_util_get_shadow_ref_src_index()
Reviewed-by: Marek Olšák <[email protected]>
Reviewed-by: Neha Bhende <[email protected]>
Reviewed-by: Charmaine Lee <[email protected]>
Diffstat (limited to 'src/gallium')
-rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_util.c | 8 |
1 files changed, 6 insertions, 2 deletions
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) |