From 42ab8dd6afe71b4dc65ed6765919cb588a4a5b01 Mon Sep 17 00:00:00 2001
From: erysdren <contact@erysdren.me>
Date: Tue, 6 Aug 2024 16:33:00 -0500
Subject: [PATCH] Catch invalid resolution in CONFIG.ROT (#80)

* Catch invalid resolution in CONFIG.ROT

* rt_cfg.c: logic error

* rt_cfg.c: logic error part 2
---
 rott/rt_cfg.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/rott/rt_cfg.c b/rott/rt_cfg.c
index 10913b6..1e71a9e 100644
--- a/rott/rt_cfg.c
+++ b/rott/rt_cfg.c
@@ -428,6 +428,14 @@ boolean ParseConfigFile (void)
       ReadInt("ScreenWidth", &iGLOBAL_SCREENWIDTH);
       ReadInt("ScreenHeight", &iGLOBAL_SCREENHEIGHT);
 
+	if ((iGLOBAL_SCREENWIDTH != 320 || iGLOBAL_SCREENHEIGHT != 200) &&
+		(iGLOBAL_SCREENWIDTH != 640 || iGLOBAL_SCREENHEIGHT != 480))
+		{
+			printf("WARNING: Invalid screen resolution %dx%d. Reverting to 640x480.\n", iGLOBAL_SCREENWIDTH, iGLOBAL_SCREENHEIGHT);
+			iGLOBAL_SCREENWIDTH = 640;
+			iGLOBAL_SCREENHEIGHT = 480;
+		}
+
       // Read in ViewSize
 
       ReadInt("ViewSize",&viewsize);