From ac1ff1b9fe19077e53ff4cd14a1b083232c8bf72 Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Tue, 7 Apr 2009 17:31:14 -0600
Subject: mesa: add another special/optimized case in _mesa_unpack_depth_span()

---
 src/mesa/main/image.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/mesa/main')

diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index 5cb110f3a5..ddae456fa1 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -4546,6 +4546,17 @@ _mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
          }
          return;
       }
+      if (srcType == GL_UNSIGNED_INT_24_8
+          && dstType == GL_UNSIGNED_INT
+          && depthMax == 0xffffff) {
+         const GLuint *src = (const GLuint *) source;
+         GLuint *dst = (GLuint *) dest;
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            dst[i] = src[i] >> 8;
+         }
+         return;
+      }
       /* XXX may want to add additional cases here someday */
    }
 
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