commit 5ae282135f982505fab655d4f597e7329fb8b0d1
author Pierre Ossman <ossman@cendio.se> Tue May 16 14:30:38 2017 +0200
committer Pierre Ossman <ossman@cendio.se> Mon Aug 28 13:54:30 2017 +0200
tree fe4b2315735c1db49be288fee04dcb4674296364
parent c719e4a0c9e1e3e5b7d22aa42cdaedda3cb06803

Basic support for QEMU Extended Key Events

This adds the basic infrastructure and handshake for the QEMU
Extended Key Events extension. No viewer or server makes use of
the extra functionality yet though.

common/rfb/SMsgWriter.cxx

diff --git a/common/rfb/SMsgWriter.cxx b/common/rfb/SMsgWriter.cxx
index d8adfbc..2d4998b 100644
--- a/common/rfb/SMsgWriter.cxx
+++ b/common/rfb/SMsgWriter.cxx
@@ -39,7 +39,7 @@
     needSetDesktopSize(false), needExtendedDesktopSize(false),
     needSetDesktopName(false), needSetCursor(false),
     needSetXCursor(false), needSetCursorWithAlpha(false),
-    needLEDState(false)
+    needLEDState(false), needQEMUKeyEvent(false)
 {
 }
 
@@ -207,6 +207,16 @@
   return true;
 }
 
+bool SMsgWriter::writeQEMUKeyEvent()
+{
+  if (!cp->supportsQEMUKeyEvent)
+    return false;
+
+  needQEMUKeyEvent = true;
+
+  return true;
+}
+
 bool SMsgWriter::needFakeUpdate()
 {
   if (needSetDesktopName)
@@ -215,6 +225,8 @@
     return true;
   if (needLEDState)
     return true;
+  if (needQEMUKeyEvent)
+    return true;
   if (needNoDataUpdate())
     return true;
 
@@ -265,6 +277,8 @@
       nRects++;
     if (needLEDState)
       nRects++;
+    if (needQEMUKeyEvent)
+      nRects++;
   }
 
   os->writeU16(nRects);
@@ -385,6 +399,11 @@
     writeLEDStateRect(cp->ledState());
     needLEDState = false;
   }
+
+  if (needQEMUKeyEvent) {
+    writeQEMUKeyEventRect();
+    needQEMUKeyEvent = false;
+  }
 }
 
 void SMsgWriter::writeNoDataRects()
@@ -565,3 +584,17 @@
   os->writeU32(pseudoEncodingLEDState);
   os->writeU8(state);
 }
+
+void SMsgWriter::writeQEMUKeyEventRect()
+{
+  if (!cp->supportsQEMUKeyEvent)
+    throw Exception("Client does not support QEMU extended key events");
+  if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
+    throw Exception("SMsgWriter::writeQEMUKeyEventRect: nRects out of sync");
+
+  os->writeS16(0);
+  os->writeS16(0);
+  os->writeU16(0);
+  os->writeU16(0);
+  os->writeU32(pseudoEncodingQEMUKeyEvent);
+}