Mesa (master): llvmpipe: fix rasterization of vertical lines on pixel boundaries

[Jose Fonseca]

Module: Mesa
Branch: master
Commit: 6316d540564d116460bfd1382e3eee98480e28ff
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=6316d540564d116460bfd1382e3eee98480e28ff

Author: Zack Rusin <zackr at vmware.com>
Date:   Thu Oct  7 16:26:17 2010 -0400

llvmpipe: fix rasterization of vertical lines on pixel boundaries

---

 src/gallium/drivers/llvmpipe/lp_setup_line.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/llvmpipe/lp_setup_line.c b/src/gallium/drivers/llvmpipe/lp_setup_line.c
index 4d7d623..693ac28 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_line.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup_line.c
@@ -475,7 +475,7 @@ try_setup_line( struct lp_setup_context *setup,
       else {
          /* do intersection test */
          float xintersect = fracf(v2[0][0]) + y2diff * dxdy;
-         draw_end = (xintersect < 1.0 && xintersect > 0.0);
+         draw_end = (xintersect < 1.0 && xintersect >= 0.0);
       }
 
       /* Are we already drawing start/end?
@@ -513,7 +513,7 @@ try_setup_line( struct lp_setup_context *setup,
             x_offset_end = y_offset_end * dxdy;
          }
       }
- 
+
       /* x/y positions in fixed point */
       x[0] = subpixel_snap(v1[0][0] + x_offset     - setup->pixel_offset) - fixed_width/2;
       x[1] = subpixel_snap(v2[0][0] + x_offset_end - setup->pixel_offset) - fixed_width/2;