Mesa (master): i965/gen7: Set up surface horizontal alignment field.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: f0d5c92a4c9d5057d727819e501d80c5dfcdf76e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f0d5c92a4c9d5057d727819e501d80c5dfcdf76e

Author: Eric Anholt <eric at anholt.net>
Date:   Tue Jan 17 11:28:56 2012 -0800

i965/gen7: Set up surface horizontal alignment field.

This is required for Z16 support for texturing, which is the first
thing to have a horizontal alignment of 8.  Renderbuffers don't need
it, since they're always set up as the only mip level, but do it for
completeness anyway.

NOTE: This is a candidate for the 8.0 branch.

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Chad Versace <chad.versace at linux.intel.com>

---

 src/mesa/drivers/dri/i965/gen7_wm_surface_state.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/gen7_wm_surface_state.c b/src/mesa/drivers/dri/i965/gen7_wm_surface_state.c
index 25d4a3e..70a0bc9 100644
--- a/src/mesa/drivers/dri/i965/gen7_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/gen7_wm_surface_state.c
@@ -74,6 +74,8 @@ gen7_update_texture_surface(struct gl_context *ctx, GLuint unit)
 
    if (mt->align_h == 4)
       surf->ss0.vertical_alignment = 1;
+   if (mt->align_w == 8)
+      surf->ss0.horizontal_alignment = 1;
 
    surf->ss0.surface_type = translate_tex_target(tObj->Target);
    surf->ss0.surface_format = translate_tex_format(mt->format,
@@ -94,7 +96,6 @@ gen7_update_texture_surface(struct gl_context *ctx, GLuint unit)
    gen7_set_surface_tiling(surf, intelObj->mt->region->tiling);
 
    /* ss0 remaining fields:
-    * - horizontal_alignment
     * - vert_line_stride (exists on gen6 but we ignore it)
     * - vert_line_stride_ofs (exists on gen6 but we ignore it)
     * - surface_array_spacing
@@ -206,6 +207,8 @@ gen7_update_renderbuffer_surface(struct brw_context *brw,
 
    if (irb->mt->align_h == 4)
       surf->ss0.vertical_alignment = 1;
+   if (irb->mt->align_w == 8)
+      surf->ss0.horizontal_alignment = 1;
 
    switch (irb->Base.Format) {
    case MESA_FORMAT_SARGB8: