From 1243217547de55a9a83a2fadf88e73406b2769c6 Mon Sep 17 00:00:00 2001
From: Martin Kiewitz
Date: Thu, 22 Apr 2010 18:12:25 +0000
Subject: SCI: added additional comment for setOrigin() commit (from waltervn),
 after doing some test with sierra interpreter

svn-id: r48775
---
 engines/sci/graphics/ports.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/engines/sci/graphics/ports.cpp b/engines/sci/graphics/ports.cpp
index 8802d1ccb2..f3f834e0d8 100644
--- a/engines/sci/graphics/ports.cpp
+++ b/engines/sci/graphics/ports.cpp
@@ -389,6 +389,8 @@ Port *GfxPorts::getPort() {
 
 void GfxPorts::setOrigin(int16 left, int16 top) {
 	// This looks fishy, but it's exactly what sierra did. They removed last bit of left in their interpreter
+	//  It seems sierra did it for EGA byte alignment (EGA uses 1 byte for 2 pixels) and left it in their interpreter even
+	//  when going VGA.
 	_curPort->left = left & 0x7FFE;
 	_curPort->top = top;
 }
-- 
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