diff options
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_pipe_twoside.c | 27 |
1 files changed, 9 insertions, 18 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe_twoside.c b/src/gallium/auxiliary/draw/draw_pipe_twoside.c index 9a3f3fe..b1a70a0 100644 --- a/src/gallium/auxiliary/draw/draw_pipe_twoside.c +++ b/src/gallium/auxiliary/draw/draw_pipe_twoside.c @@ -38,8 +38,8 @@ struct twoside_stage { struct draw_stage stage; float sign; /**< +1 or -1 */ - uint attrib_front0, attrib_back0; - uint attrib_front1, attrib_back1; + int attrib_front0, attrib_back0; + int attrib_front1, attrib_back1; }; @@ -48,9 +48,6 @@ static INLINE struct twoside_stage *twoside_stage( struct draw_stage *stage ) return (struct twoside_stage *)stage; } - - - /** * Copy back color(s) to front color(s). */ @@ -60,12 +57,12 @@ copy_bfc( struct twoside_stage *twoside, unsigned idx ) { struct vertex_header *tmp = dup_vert( &twoside->stage, v, idx ); - - if (twoside->attrib_back0) { + + if (twoside->attrib_back0 >= 0 && twoside->attrib_front0 >= 0) { COPY_4FV(tmp->data[twoside->attrib_front0], tmp->data[twoside->attrib_back0]); } - if (twoside->attrib_back1) { + if (twoside->attrib_back1 >= 0 && twoside->attrib_front1 >= 0) { COPY_4FV(tmp->data[twoside->attrib_front1], tmp->data[twoside->attrib_back1]); } @@ -109,10 +106,10 @@ static void twoside_first_tri( struct draw_stage *stage, const struct draw_vertex_shader *vs = stage->draw->vs.vertex_shader; uint i; - twoside->attrib_front0 = 0; - twoside->attrib_front1 = 0; - twoside->attrib_back0 = 0; - twoside->attrib_back1 = 0; + twoside->attrib_front0 = -1; + twoside->attrib_front1 = -1; + twoside->attrib_back0 = -1; + twoside->attrib_back1 = -1; /* Find which vertex shader outputs are front/back colors */ for (i = 0; i < vs->info.num_outputs; i++) { @@ -130,12 +127,6 @@ static void twoside_first_tri( struct draw_stage *stage, } } - if (!twoside->attrib_back0) - twoside->attrib_front0 = 0; - - if (!twoside->attrib_back1) - twoside->attrib_front1 = 0; - /* * We'll multiply the primitive's determinant by this sign to determine * if the triangle is back-facing (negative). |