From 965dbdedb7b2b80b9fcaa391ef445641824513dc Mon Sep 17 00:00:00 2001
From: Christopher Pitstick <cmp@pitstick.net>
Date: Sat, 25 Jun 2022 22:37:11 -0400
Subject: [PATCH] Fixes MSTSC resize issue/crash

The RFX compression mode requires an encoder. When you resize RFX, you
have to recreate the encoder.

This will fix it as well: https://github.com/neutrinolabs/xrdp/pull/2175,
however, that PR is bigger and more complex and may take longer.
---
 xrdp/xrdp_mm.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/xrdp/xrdp_mm.c b/xrdp/xrdp_mm.c
index 22993d01..9ee7b8e8 100644
--- a/xrdp/xrdp_mm.c
+++ b/xrdp/xrdp_mm.c
@@ -1130,6 +1130,17 @@ process_dynamic_monitor_description(struct xrdp_wm *wm,
         }
     }
 
+    // Need to recreate the encoder for connections that use it.
+    if (mm->encoder != NULL)
+    {
+        xrdp_encoder_delete(mm->encoder);
+        mm->encoder = NULL;
+    }
+    if (mm->encoder == NULL)
+    {
+        mm->encoder = xrdp_encoder_create(mm);
+    }
+
     wm->client_info->display_sizes.monitorCount = description->monitorCount;
     wm->client_info->display_sizes.session_width = description->session_width;
     wm->client_info->display_sizes.session_height = description->session_height;