Tweak the quality to JPEG settings mapping a bit.

The percieved quality isn't really linear compared to the actual quality
setting, so make it a bit more top heavy. Also disable color subsampling
at some levels and make the highest quality lossless.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3660 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/rfb/TightEncoder.h b/common/rfb/TightEncoder.h
index 9773135..35f2f59 100644
--- a/common/rfb/TightEncoder.h
+++ b/common/rfb/TightEncoder.h
@@ -35,7 +35,7 @@
     unsigned int monoMinRectSize;
     int idxZlibLevel, monoZlibLevel, rawZlibLevel;
     int idxMaxColorsDivisor;
-    int jpegQuality;
+    int jpegQuality, jpegSubSample;
   };
 
   //