xbmc-996.00-accurate-aspect-ratio.patch

commit d6f758f103888cd1b92e6e8dcc7b9d27203f26ef
Author: Lauri Myllari <lauri.myllari@gmail.com>
Date:   Fri Jan 17 15:44:25 2014 -0800

    [X11] Use exact aspect ratio for 16:9 and 4:3 displays

diff --git a/xbmc/windowing/X11/WinSystemX11.cpp b/xbmc/windowing/X11/WinSystemX11.cpp
index c95f4ec..43aa737 100644
--- a/xbmc/windowing/X11/WinSystemX11.cpp
+++ b/xbmc/windowing/X11/WinSystemX11.cpp
@@ -373,8 +373,18 @@ void CWinSystemX11::UpdateResolutions()
         res.iWidth  = mode.h;
         res.iHeight = mode.w;
       }
-      if (mode.h>0 && mode.w>0 && out->hmm>0 && out->wmm>0)
-        res.fPixelRatio = ((float)out->wmm/(float)mode.w) / (((float)out->hmm/(float)mode.h));
+      if (mode.h>0 && mode.w>0 && out->hmm>0 && out->wmm>0) {
+        float aspectx, aspecty;
+        float phyaspect = (float)out->wmm / (float)out->hmm;
+        if (fabs(1-((16.0/9)/phyaspect)) < 0.01) {
+          aspectx = 16.0; aspecty = 9.0;
+        } else if (fabs(1-((4.0/3)/phyaspect)) < 0.01) {
+          aspectx = 4.0; aspecty = 3.0;
+        } else {
+          aspectx = (float)out->wmm; aspecty = (float)out->hmm;
+        }
+        res.fPixelRatio = (aspectx/(float)mode.w) / ((aspecty/(float)mode.h));
+      }
       else
         res.fPixelRatio = 1.0f;