From 1491c6aa2de17760ab157a3fe71e45006e4eecf6 Mon Sep 17 00:00:00 2001 From: Zack Rusin Date: Tue, 13 Jul 2010 21:49:53 -0400 Subject: mesa: add comments and change Index2D to just Index2 --- src/mesa/program/prog_instruction.h | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) (limited to 'src/mesa/program/prog_instruction.h') diff --git a/src/mesa/program/prog_instruction.h b/src/mesa/program/prog_instruction.h index cb5beb9b00d..dacbc33704b 100644 --- a/src/mesa/program/prog_instruction.h +++ b/src/mesa/program/prog_instruction.h @@ -272,9 +272,19 @@ struct prog_src_register */ GLuint Negate:4; - GLuint HasIndex2D:1; - GLuint RelAddr2D:1; - GLint Index2D:(INST_INDEX_BITS+1); /**< Extra bit here for sign bit. + /** + * Is the register two-dimensional. + * Two dimensional registers are of the + * REGISTER[index][index2] format. + * They are used by the geometry shaders where + * the first index is the index within an array + * and the second index is the semantic of the + * array, e.g. gl_PositionIn[index] would become + * INPUT[index][gl_PositionIn] + */ + GLuint HasIndex2:1; + GLuint RelAddr2:1; + GLint Index2:(INST_INDEX_BITS+1); /**< Extra bit here for sign bit. * May be negative for relative * addressing. */ }; -- cgit v1.2.3