Mesa (master): llvmpipe: cull zero-area triangles early
Keith Whitwell
keithw at kemper.freedesktop.org
Wed Aug 25 09:32:12 UTC 2010
Module: Mesa
Branch: master
Commit: c25151dd6a06acd93c8bf0d9e79fdcf134ffe818
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=c25151dd6a06acd93c8bf0d9e79fdcf134ffe818
Author: Keith Whitwell <keithw at vmware.com>
Date: Fri Aug 20 16:18:23 2010 +0100
llvmpipe: cull zero-area triangles early
---
src/gallium/drivers/llvmpipe/lp_setup_tri.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/src/gallium/drivers/llvmpipe/lp_setup_tri.c b/src/gallium/drivers/llvmpipe/lp_setup_tri.c
index 614a637..b432539 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_tri.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup_tri.c
@@ -819,9 +819,10 @@ static void triangle_both( struct lp_setup_context *setup,
const float fy = v1[0][1] - v2[0][1];
/* det = cross(e,f).z */
- if (ex * fy - ey * fx < 0.0f)
+ const float det = ex * fy - ey * fx;
+ if (det < 0.0f)
triangle_ccw( setup, v0, v1, v2 );
- else
+ else if (det > 0.0f)
triangle_cw( setup, v0, v1, v2 );
}
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