Mesa (master): svga: adjust line subpixel position for HWv8

[Brian Paul]

Module: Mesa
Branch: master
Commit: 5b8d33acefa9adbf1f0c9ff10f1933a0b3a5c66b
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5b8d33acefa9adbf1f0c9ff10f1933a0b3a5c66b

Author: Brian Paul <brianp at vmware.com>
Date:   Wed Jul  5 20:08:54 2017 -0600

svga: adjust line subpixel position for HWv8

This fixes two regressions on HWv8:
  Piglit gl-1.0-ortho-pos
  Piglit/glean fbo
This was caused by commit c2b92dada076a "svga: clamp device line width
to at least 1 to fix HWv8 line stippling"

This also fixes two conform tests: Vertex Order and Polygon Face

No Piglit/conform changes with HWv9 or later.

VMware bug 1905053

Reviewed-by: Charmaine Lee <charmainel at vmware.com>

---

 src/gallium/drivers/svga/svga_state_framebuffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gallium/drivers/svga/svga_state_framebuffer.c b/src/gallium/drivers/svga/svga_state_framebuffer.c
index bb92c54ff3..c52b7eeebf 100644
--- a/src/gallium/drivers/svga/svga_state_framebuffer.c
+++ b/src/gallium/drivers/svga/svga_state_framebuffer.c
@@ -561,7 +561,7 @@ emit_viewport( struct svga_context *svga,
             break;
          case PIPE_PRIM_LINES:
             adjust_x = -0.5;
-            adjust_y = 0;
+            adjust_y = -0.125;
             break;
          case PIPE_PRIM_TRIANGLES:
             adjust_x = -0.5;