diff options
Diffstat (limited to 'src/gallium/auxiliary/tgsi')
| -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) |