From 68fe009736fc9f29d6cde58447cf2d834d0f452e Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Thu, 14 Dec 2023 23:01:56 +0100
Subject: [PATCH] Revert "#270 always clear entire screen"

This reverts commit 564419562fc250b717b9a26454e9f5aa7ee5079e.
---
 inc/version.h    | 2 +-
 src/render_ogl.c | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/inc/version.h b/inc/version.h
index 7a74663..7d4039c 100644
--- a/inc/version.h
+++ b/inc/version.h
@@ -7,7 +7,7 @@
 #define VERSION_MAJOR    6
 #define VERSION_MINOR    0
 #define VERSION_BUILD    0
-#define VERSION_REVISION 6
+#define VERSION_REVISION 5
 
 #define VERSION          VERSION_MAJOR, VERSION_MINOR, VERSION_BUILD, VERSION_REVISION
 #define VERSION_STRING   ver_str(VERSION_MAJOR, VERSION_MINOR, VERSION_BUILD, VERSION_REVISION)
diff --git a/src/render_ogl.c b/src/render_ogl.c
index 028e55e..141073b 100644
--- a/src/render_ogl.c
+++ b/src/render_ogl.c
@@ -804,7 +804,10 @@ static void ogl_render()
 
         LeaveCriticalSection(&g_ddraw->cs);
 
-        glClear(GL_COLOR_BUFFER_BIT);
+        if (g_ddraw->render.viewport.x != 0 || g_ddraw->render.viewport.y != 0)
+        {
+            glClear(GL_COLOR_BUFFER_BIT);
+        }
 
         if (scale_changed)
         {