From 91bff5af1ef066d66084f97557ef219cbeb0fce3 Mon Sep 17 00:00:00 2001
From: Peter Veenstra <qbix79@users.sourceforge.net>
Date: Thu, 18 Aug 2005 11:01:10 +0000
Subject: [PATCH] Added patch 1261703 from Vasyl Tsvirkunov. Fixes some shaking
 effects by implementing more correct pixel panning logic

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2279
---
 src/hardware/vga_draw.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/hardware/vga_draw.cpp b/src/hardware/vga_draw.cpp
index 9622bd65..5a8e2563 100644
--- a/src/hardware/vga_draw.cpp
+++ b/src/hardware/vga_draw.cpp
@@ -215,7 +215,9 @@ static void VGA_DrawPart(Bitu lines) {
 			vga.draw.address+=vga.draw.address_add;
 		}
 		if (vga.draw.split_line==vga.draw.lines_done) {
-			vga.draw.address=0;vga.draw.panning=0;
+			vga.draw.address=0;
+			if(vga.attr.mode_control&0x20)
+				vga.draw.panning=0;
 			vga.draw.address_line=0;
 		}
 	}