[Mesa-dev] [PATCH] draw: fix slot detection

[Zack Rusin]

Nowadays -1 for slots means that the semantic is not present, so
we need to store it in a signed variables, otherwise <0 comparisons
are pointless. Fixes
http://bugzilla.eng.vmware.com/show_bug.cgi?id=67811 (at least
with softpipe, edgeflags don't work wit llvmpipe)

Signed-off-by: Zack Rusin <zackr at vmware.com>
---
 src/gallium/auxiliary/draw/draw_pipe_unfilled.c |    2 +-
 src/gallium/drivers/llvmpipe/lp_setup_context.h |    2 +-
 src/gallium/drivers/llvmpipe/lp_setup_line.c    |    1 -
 3 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/gallium/auxiliary/draw/draw_pipe_unfilled.c b/src/gallium/auxiliary/draw/draw_pipe_unfilled.c
index c6ee95c..68bab72 100644
--- a/src/gallium/auxiliary/draw/draw_pipe_unfilled.c
+++ b/src/gallium/auxiliary/draw/draw_pipe_unfilled.c
@@ -67,7 +67,7 @@ inject_front_face_info(struct draw_stage *stage,
    boolean is_front_face = (
       (stage->draw->rasterizer->front_ccw && ccw) ||
       (!stage->draw->rasterizer->front_ccw && !ccw));
-   unsigned slot = unfilled->face_slot;
+   int slot = unfilled->face_slot;
    unsigned i;
 
    /* In case the backend doesn't care about it */
diff --git a/src/gallium/drivers/llvmpipe/lp_setup_context.h b/src/gallium/drivers/llvmpipe/lp_setup_context.h
index ea1d0d6..44be85f 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_context.h
+++ b/src/gallium/drivers/llvmpipe/lp_setup_context.h
@@ -106,7 +106,7 @@ struct lp_setup_context
    float psize;
    unsigned viewport_index_slot;
    unsigned layer_slot;
-   unsigned face_slot;
+   int face_slot;
 
    struct pipe_framebuffer_state fb;
    struct u_rect framebuffer;
diff --git a/src/gallium/drivers/llvmpipe/lp_setup_line.c b/src/gallium/drivers/llvmpipe/lp_setup_line.c
index 3b16163..a25a6b0 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_line.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup_line.c
@@ -622,7 +622,6 @@ try_setup_line( struct lp_setup_context *setup,
    } else {
       line->inputs.frontfacing = TRUE;
    }
-   
 
    /* Setup parameter interpolants:
     */
-- 
1.7.10.4