Mesa (master): svga: fix pixel center integer

[Brian Paul]

Module: Mesa
Branch: master
Commit: 1d05caf9f2b27b1af4424ebd66584ab2b25025a5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=1d05caf9f2b27b1af4424ebd66584ab2b25025a5

Author: Brian Paul <brianp at vmware.com>
Date:   Mon Sep 30 09:47:31 2013 -0600

svga: fix pixel center integer

The svga/d3d9 convention is that pixel centers are at integer coordinates.
Fixes piglit glsl-arb-fragment-coord-conventions test.

Reviewed-by: José Fonseca <jfonseca at vmware.com>

---

 src/gallium/drivers/svga/svga_screen.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index d0e242a..a1108c6 100644
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -207,11 +207,13 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 1;
 
    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
-   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
       return 1;
+   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
+      return 0;
    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
-   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
       return 0;
+   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
+      return 1;
 
    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
       return 1; /* The color outputs of vertex shaders are not clamped */