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@vmware.com>

diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index d0e242ab44776d2e8b79cf6c0640684199b40d6f..a1108c6283764e3b47e668f5698071901d432064 100644 (file)
--- 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 */