From 862f419d96eed99c80b1e920ae9715e5412d3672 Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Wed, 13 Sep 2023 19:05:49 +0200
Subject: [PATCH] force "adjmouse = TRUE" when downscaling was detected

---
 src/dd.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/dd.c b/src/dd.c
index b7005b8..b2d2462 100644
--- a/src/dd.c
+++ b/src/dd.c
@@ -713,6 +713,13 @@ HRESULT dd_SetDisplayMode(DWORD dwWidth, DWORD dwHeight, DWORD dwBPP, DWORD dwFl
                     if (!found_res ||
                         ChangeDisplaySettings(&g_ddraw->render.mode, CDS_TEST) != DISP_CHANGE_SUCCESSFUL)
                     {
+                        if (g_ddraw->width > g_ddraw->mode.dmPelsWidth ||
+                            g_ddraw->height > g_ddraw->mode.dmPelsHeight)
+                        {
+                            /* Downscaling requires adjmouse to be enabled */
+                            g_ddraw->adjmouse = TRUE;
+                        }
+
                         /* try current display settings */
                         g_ddraw->render.width = g_ddraw->mode.dmPelsWidth;
                         g_ddraw->render.height = g_ddraw->mode.dmPelsHeight;