From e860cb64dbcb170207641fc280e47858fae74891 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= <maraeo@gmail.com>
Date: Fri, 24 Jun 2011 23:39:51 +0200
Subject: [PATCH] gallium/util: implement software Z32F_S8X24 depth-stencil
 clear

---
 src/gallium/auxiliary/util/u_surface.c | 35 +++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/util/u_surface.c b/src/gallium/auxiliary/util/u_surface.c
index 4c5cc4da182..8e123867da6 100644
--- a/src/gallium/auxiliary/util/u_surface.c
+++ b/src/gallium/auxiliary/util/u_surface.c
@@ -358,8 +358,41 @@ util_clear_depth_stencil(struct pipe_context *pipe,
                dst_map += dst_stride;
             }
          }
-        break;
+         break;
       case 8:
+      {
+         uint64_t zstencil = util_pack64_z_stencil(dst->texture->format,
+                                                   depth, stencil);
+
+         assert(dst->format == PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED);
+
+         if (!need_rmw) {
+            for (i = 0; i < height; i++) {
+               uint64_t *row = (uint64_t *)dst_map;
+               for (j = 0; j < width; j++)
+                  *row++ = zstencil;
+               dst_map += dst_stride;
+            }
+         }
+         else {
+            uint64_t src_mask;
+
+            if (clear_flags & PIPE_CLEAR_DEPTH)
+               src_mask = 0x00000000ffffffffull;
+            else
+               src_mask = 0x000000ff00000000ull;
+
+            for (i = 0; i < height; i++) {
+               uint64_t *row = (uint64_t *)dst_map;
+               for (j = 0; j < width; j++) {
+                  uint64_t tmp = *row & ~src_mask;
+                  *row++ = tmp | (zstencil & src_mask);
+               }
+               dst_map += dst_stride;
+            }
+         }
+         break;
+      }
       default:
          assert(0);
          break;
-- 
2.30.2