From 03717e11d489d4abbd3da6252eaa29511d1bf292 Mon Sep 17 00:00:00 2001
From: krzys-h <krzys_h@interia.pl>
Date: Sat, 11 Jul 2015 23:53:25 +0200
Subject: [PATCH] Added aspect ratio in resolution list (#501)

---
 src/ui/maindialog.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/ui/maindialog.cpp b/src/ui/maindialog.cpp
index ec866b4d..665197e4 100644
--- a/src/ui/maindialog.cpp
+++ b/src/ui/maindialog.cpp
@@ -4545,6 +4545,15 @@ void CMainDialog::UpdateSceneResume(int rank)
 
 // Updates the list of modes.
 
+int GCD(int a, int b) {
+    return (b == 0) ? a : GCD(b, a%b);
+}
+Math::IntPoint AspectRatio(Math::IntPoint resolution)
+{
+    int gcd = GCD(resolution.x, resolution.y);
+    return Math::IntPoint(static_cast<float>(resolution.x) / gcd, static_cast<float>(resolution.y) / gcd);
+}
+
 void CMainDialog::UpdateDisplayMode()
 {
     CWindow*    pw;
@@ -4563,7 +4572,8 @@ void CMainDialog::UpdateDisplayMode()
     for (Math::IntPoint mode : modes)
     {
         mode_text.str("");
-        mode_text << mode.x << "x" << mode.y;
+        Math::IntPoint aspect = AspectRatio(mode);
+        mode_text << mode.x << "x" << mode.y << " [" << aspect.x << ":" << aspect.y << "]";
         pl->SetItemName(i++, mode_text.str().c_str());
     }