Allow perceptually lossless refresh
Loosen the definition of "lossless" a bit so that we can use high
quality JPEG to refresh damaged parts of the screen. Although this
isn't bit perfect, it is close enough that most users will not be
able to tell the difference.
Level 9 is used rather than level 8 because some monitors have
exaggerated contrast that allows the artefacts from level 8 to be
noticeable.
diff --git a/common/rfb/TightJPEGEncoder.cxx b/common/rfb/TightJPEGEncoder.cxx
index bbe4f8f..38cb4eb 100644
--- a/common/rfb/TightJPEGEncoder.cxx
+++ b/common/rfb/TightJPEGEncoder.cxx
@@ -64,7 +64,8 @@
TightJPEGEncoder::TightJPEGEncoder(SConnection* conn) :
- Encoder(conn, encodingTight, (EncoderFlags)(EncoderUseNativePF | EncoderLossy)),
+ Encoder(conn, encodingTight,
+ (EncoderFlags)(EncoderUseNativePF | EncoderLossy), -1, 9),
qualityLevel(-1), fineQuality(-1), fineSubsampling(subsampleUndefined)
{
}