Mesa (master): util: add get/put_tile_z() support for PIPE_FORMAT_Z32_FLOAT_S8X24_UINT

[Brian Paul]

Module: Mesa
Branch: master
Commit: 073a53fe2f39cfa42090b223cbaf287b48cefe8e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=073a53fe2f39cfa42090b223cbaf287b48cefe8e

Author: Brian Paul <brianp at vmware.com>
Date:   Thu Jan  3 08:02:57 2013 -0700

util: add get/put_tile_z() support for PIPE_FORMAT_Z32_FLOAT_S8X24_UINT

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=58972

Note: This is a candidate for the stable branches.

---

 src/gallium/auxiliary/util/u_tile.c |   36 +++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/util/u_tile.c b/src/gallium/auxiliary/util/u_tile.c
index f4b5cad..b3676de 100644
--- a/src/gallium/auxiliary/util/u_tile.c
+++ b/src/gallium/auxiliary/util/u_tile.c
@@ -678,6 +678,28 @@ pipe_get_tile_z(struct pipe_transfer *pt,
          }
       }
       break;
+   case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
+      {
+         const float *ptrc = (const float *)(map + y * pt->stride + x*8);
+         for (i = 0; i < h; i++) {
+            for (j = 0; j < w; j++) {
+               /* convert float Z to 32-bit Z */
+               if (ptrc[j] <= 0.0) {
+                  pDest[j*2] = 0;
+               }
+               else if (ptrc[j] >= 1.0) {
+                  pDest[j*2] = 0xffffffff;
+               }
+               else {
+                  double z = ptrc[j] * 0xffffffff;
+                  pDest[j*2] = (uint) z;
+               }
+            }
+            pDest += dstStride;
+            ptrc += pt->stride/4;
+         }
+      }
+      break;
    default:
       assert(0);
    }
@@ -791,6 +813,20 @@ pipe_put_tile_z(struct pipe_transfer *pt,
          }
       }
       break;
+   case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
+      {
+         float *pDest = (float *) (map + y * pt->stride + x*8);
+         for (i = 0; i < h; i++) {
+            for (j = 0; j < w; j++) {
+               /* convert 32-bit integer Z to float Z */
+               const double scale = 1.0 / 0xffffffffU;
+               pDest[j*2] = ptrc[j] * scale;
+            }
+            pDest += pt->stride/4;
+            ptrc += srcStride;
+         }
+      }
+      break;
    default:
       assert(0);
    }