Send lossless refresh even with pending updates
There might be parts of the screen that haven't changed and can
therefore be refreshed. Figure which parts these are and send just
those.
diff --git a/common/rfb/VNCServerST.cxx b/common/rfb/VNCServerST.cxx
index 15df71b..95870c9 100644
--- a/common/rfb/VNCServerST.cxx
+++ b/common/rfb/VNCServerST.cxx
@@ -656,17 +656,21 @@
// checkUpdate() is called by clients to see if it is safe to read from
// the framebuffer at this time.
-bool VNCServerST::checkUpdate()
+Region VNCServerST::getPendingRegion()
{
+ UpdateInfo ui;
+
// Block clients as the frame buffer cannot be safely accessed
if (blockCounter > 0)
- return false;
+ return pb->getRect();
// Block client from updating if there are pending updates
- if (!comparer->is_empty())
- return false;
+ if (comparer->is_empty())
+ return Region();
- return true;
+ comparer->getUpdateInfo(&ui, pb->getRect());
+
+ return ui.changed.union_(ui.copied);
}
const RenderedCursor* VNCServerST::getRenderedCursor()