Ported encoding optimizations from TurboVNC. The changes to the Tight parameters were determined through extensive low-level profiling (see http://www.virtualgl.org/pmwiki/uploads/About/turbototiger.pdf). The other enhancements involved: (1) porting the solid subrectangle pre-computation code from TightVNC/TurboVNC (it makes a pretty big difference-- see report), (2) encapsulating the JPEG encoder in its own class (this eliminates a buffer copy, and the JPEG buffer is now set to a decent size where it shouldn't ever need to be paged or re-allocated, except in rare corner cases), (3) adding support for last rect. encoding (necessary to support the solid rectangle pre-computation enhancements.
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4626 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/rfb/SMsgWriterV3.cxx b/common/rfb/SMsgWriterV3.cxx
index 08f5a2e..af1187e 100644
--- a/common/rfb/SMsgWriterV3.cxx
+++ b/common/rfb/SMsgWriterV3.cxx
@@ -1,5 +1,6 @@
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright 2009 Pierre Ossman for Cendio AB
+ * Copyright (C) 2011 D. R. Commander. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -178,15 +179,20 @@
startMsg(msgTypeFramebufferUpdate);
os->pad(1);
- if (wsccb)
- nRects++;
- if (needSetDesktopName)
- nRects++;
+ if (nRects != 0xFFFF) {
+ if (wsccb)
+ nRects++;
+ if (needSetDesktopName)
+ nRects++;
+ }
os->writeU16(nRects);
nRectsInUpdate = 0;
- nRectsInHeader = nRects;
+ if (nRects == 0xFFFF)
+ nRectsInHeader = 0;
+ else
+ nRectsInHeader = nRects;
writePseudoRects();
}
@@ -208,6 +214,15 @@
throw Exception("SMsgWriterV3::writeFramebufferUpdateEnd: "
"nRects out of sync");
+ if (nRectsInHeader == 0) {
+ // Send last rect. marker
+ os->writeS16(0);
+ os->writeS16(0);
+ os->writeU16(0);
+ os->writeU16(0);
+ os->writeU32(pseudoEncodingLastRect);
+ }
+
if (os == updateOS) {
os = realOS;
startMsg(msgTypeFramebufferUpdate);