[plasma/krdp/Plasma/6.7] src: VideoStream: preserve accumulated damage when coalescing progressive frames

Git commit b1080661f30d0bab4055a50e18622533ef80a1b9 by David Edmundson.
Committed on 22/07/2026 at 07:22.
Pushed by davidedmundson into branch 'Plasma/6.7'.

VideoStream: preserve accumulated damage when coalescing progressive frames

queueFrame merges a dropped frame's damage into `nextFrame`, but then
appends the original `frame` — discarding the merge. Under load (frames
coalescing), the dropped frame's regions are never sent and stay stale on
the client until re-damaged.

Append `nextFrame` instead. (Also makes the move real: `frame` is a
`const &` so it was silently copied.)


(cherry picked from commit 70f93c3278e688c3dc8f86c0cadc5b559119f609)

Co-authored-by: Shouvik Kar <[email protected]>

M  +1    -1    src/VideoStream.cpp

https://invent.kde.org/plasma/krdp/-/commit/b1080661f30d0bab4055a50e18622533ef80a1b9

diff --git a/src/VideoStream.cpp b/src/VideoStream.cpp
index 104f374..b7716cd 100644
--- a/src/VideoStream.cpp
+++ b/src/VideoStream.cpp
@@ -437,7 +437,7 @@ void VideoStream::queueFrame(const KRdp::VideoFrame &frame)
         }
         KRdp::VideoFrame nextFrame = frame;
         nextFrame.damage += lastDamage;
-        d->frameQueue.append(std::move(frame));
+        d->frameQueue.append(std::move(nextFrame));
     }
 }