From 10bea2819ba8f4ec4aee5cfe9daf5a6941540557 Mon Sep 17 00:00:00 2001
From: Pierre Ossman <ossman@cendio.se>
Date: Wed, 19 Sep 2018 16:27:56 +0200
Subject: [PATCH] Fix calculation of maximum lossless refresh area

The update size is in bytes, but we are counting pixels. So make
sure we convert things properly before comparing.
---
 common/rfb/EncodeManager.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/rfb/EncodeManager.cxx b/common/rfb/EncodeManager.cxx
index 8f5427c8..d783d54b 100644
--- a/common/rfb/EncodeManager.cxx
+++ b/common/rfb/EncodeManager.cxx
@@ -476,6 +476,9 @@ Region EncodeManager::getLosslessRefresh(const Region& req,
   // We make a conservative guess at the compression ratio at 2:1
   maxUpdateSize *= 2;
 
+  // We will measure pixels, not bytes (assume 32 bpp)
+  maxUpdateSize /= 4;
+
   area = 0;
   pendingRefreshRegion.intersect(req).get_rects(&rects);
   while (!rects.empty()) {
-- 
2.39.5