Fix wrong vertical frame mirror for different sized channels

Author: dnachbaur

deflect/server/FrameDispatcher.cpp

@@ -43,6 +43,7 @@
 #include "ReceiveBuffer.h"
 
 #include <cassert>
+#include <unordered_map>
 
 namespace deflect
 {
@@ -75,9 +76,15 @@ class FrameDispatcher::Impl
 
     void mirrorTilesPositionsVertically(Frame& frame) const
     {
-        const auto height = frame.computeDimensions().height();
+        std::unordered_map<int, int> heights;
+        for (const auto& tile : frame.tiles)
+            heights[tile.channel] = 0;
+
+        for (auto& entry : heights)
+            entry.second = frame.computeDimensions(entry.first).height();
+
         for (auto& tile : frame.tiles)
-            tile.y = height - tile.y - tile.height;
+            tile.y = heights[tile.channel] - tile.y - tile.height;
     }
 
     bool allConnectionsClosed(const QString& uri) const

doc/Changelog.md

@@ -4,6 +4,8 @@ Changelog {#Changelog}
 ## Deflect 1.0
 
 ### 1.0.1 (master)
+* [207](https://github.com/BlueBrain/Deflect/pull/207):
+  Fix wrong vertical frame mirror for different sized channels
 * [203](https://github.com/BlueBrain/Deflect/pull/203):
   QmlStreamer resizes the window only if the received size event is within the
   specified min/max size hints.