From 3c46bbee1bb4f107d68addae472cf7bbc0976653 Mon Sep 17 00:00:00 2001 From: Michal Krol Date: Tue, 24 Nov 2009 11:58:01 +0100 Subject: tgsi: Document Declaration Semantic token and FACE semantic name. --- .../auxiliary/tgsi/tgsi-instruction-set.txt | 32 ++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt b/src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt index eb492076b7d..080fd4c7310 100644 --- a/src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt +++ b/src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt @@ -1129,3 +1129,35 @@ TGSI Instruction Specification target Label of target instruction. + +3 Other tokens +=============== + + +3.1 Declaration Semantic +------------------------- + + + Follows Declaration token if Semantic bit is set. + + Since its purpose is to link a shader with other stages of the pipeline, + it is valid to follow only those Declaration tokens that declare a register + either in INPUT or OUTPUT file. + + SemanticName field contains the semantic name of the register being declared. + There is no default value. + + SemanticIndex is an optional subscript that can be used to distinguish + different register declarations with the same semantic name. The default value + is 0. + + The meanings of the individual semantic names are explained in the following + sections. + + +3.1.1 FACE + + Valid only in a fragment shader INPUT declaration. + + FACE.x is negative when the primitive is back facing. FACE.x is positive + when the primitive is front facing. -- cgit v1.2.3