[Piglit] [PATCH] aa: too sensitive at the line end points for PNV platform

[Marius Predut]

Adjust middles of the segments sample so that now the test pass also
on PNV platform.

Bspec documentation G45: Volume 2: 3D/Media
Last Pixel Enable  bit of  SF_STATE controls whether the last pixel
of the last line in a LINESTRIP_xxx primitive
or the last pixel of each line in a LINELIST_xxx primitive is rendered.

Signed-off-by: Marius Predut <marius.predut at intel.com>
---
 tests/general/line-aa-width.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tests/general/line-aa-width.c b/tests/general/line-aa-width.c
index c0fd7c1..e7998c4 100644
--- a/tests/general/line-aa-width.c
+++ b/tests/general/line-aa-width.c
@@ -136,7 +136,7 @@ piglit_display(void)
 	 * coverage in each column
 	 */
 	for (x1 = 2; x1 < piglit_width; x1 += seg_width) {
-		int x2 = x1 + seg_width - 4;
+		int x2 = x1 + seg_width - 5;
 		int sample_x;
 		float y1, y2;
 		float avg = 0.0;
@@ -144,8 +144,8 @@ piglit_display(void)
 		float max = -100.0;
 		char *err = NULL;
 
-		if (x2 > piglit_width - 4)
-			x2 = piglit_width - 4;
+		if (x2 > piglit_width - 5)
+			x2 = piglit_width - 5;
 
 		/* If we don't have a couple of pixels to sample because we've
 		 * hit the edge of the window, we're done.
-- 
1.9.1