From: Corentin Chary <corentincj@iksaif.net>
Date: Wed, 19 May 2010 07:24:05 +0000 (+0200)
Subject: vnc: adjust compression zstream level
X-Git-Tag: TizenStudio_2.0_p2.3~4694
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a3af141f44ba0d224b49f37d5f69cdf81abfa2da;p=sdk%2Femulator%2Fqemu.git

vnc: adjust compression zstream level

Adjust zlib compression level if needed by calling deflateParams.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---

diff --git a/vnc-encoding-zlib.c b/vnc-encoding-zlib.c
index 6a16a79..29dd1b7 100644
--- a/vnc-encoding-zlib.c
+++ b/vnc-encoding-zlib.c
@@ -83,10 +83,17 @@ static int vnc_zlib_stop(VncState *vs)
             return -1;
         }
 
+        vs->zlib_level = vs->tight_compression;
         zstream->opaque = vs;
     }
 
-    // XXX what to do if tight_compression changed in between?
+    if (vs->tight_compression != vs->zlib_level) {
+        if (deflateParams(zstream, vs->tight_compression,
+                          Z_DEFAULT_STRATEGY) != Z_OK) {
+            return -1;
+        }
+        vs->zlib_level = vs->tight_compression;
+    }
 
     // reserve memory in output buffer
     buffer_reserve(&vs->output, vs->zlib.offset + 64);
diff --git a/vnc.h b/vnc.h
index 6d92c60..3800687 100644
--- a/vnc.h
+++ b/vnc.h
@@ -178,6 +178,7 @@ struct VncState
     Buffer zlib;
     Buffer zlib_tmp;
     z_stream zlib_stream;
+    int zlib_level;
 
     Notifier mouse_mode_notifier;