From b096d8e1a0250994c8701c9e8ce896e5901d8ccd Mon Sep 17 00:00:00 2001
From: Arnout Engelen <arnout@bzzt.net>
Date: Mon, 13 Jul 2020 18:42:52 +0200
Subject: [PATCH] sweethome3d: improve performance by enabling OpenGL for
 java2d

This is a well-known optimization (see also
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=854030
http://www.sweethome3d.com/support/forum/viewthread_thread,5662
https://sourceforge.net/p/sweethome3d/bugs/854/ ) and indeed also
on my machine was a drastic improvement.
---
 pkgs/applications/misc/sweethome3d/default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/applications/misc/sweethome3d/default.nix b/pkgs/applications/misc/sweethome3d/default.nix
index bd0730a05aa..94875de7ebc 100644
--- a/pkgs/applications/misc/sweethome3d/default.nix
+++ b/pkgs/applications/misc/sweethome3d/default.nix
@@ -34,7 +34,7 @@ let
       patchelf --set-rpath ${libXxf86vm}/lib lib/java3d-1.6/linux/i586/libnativewindow_x11.so
     '';
 
-    buildInputs = [ ant jdk jre makeWrapper p7zip gtk3 gsettings-desktop-schemas ];
+    buildInputs = [ ant jdk makeWrapper p7zip gtk3 gsettings-desktop-schemas ];
 
     buildPhase = ''
       ant furniture textures help
@@ -53,7 +53,7 @@ let
 
       makeWrapper ${jre}/bin/java $out/bin/$exec \
         --prefix XDG_DATA_DIRS : "$XDG_ICON_DIRS:${gtk3.out}/share:${gsettings-desktop-schemas}/share:$out/share:$GSETTINGS_SCHEMAS_PATH" \
-        --add-flags "-jar $out/share/java/${module}-${version}.jar -cp $out/share/java/Furniture.jar:$out/share/java/Textures.jar:$out/share/java/Help.jar -d${toString stdenv.hostPlatform.parsed.cpu.bits}"
+        --add-flags "-Dsun.java2d.opengl=true -jar $out/share/java/${module}-${version}.jar -cp $out/share/java/Furniture.jar:$out/share/java/Textures.jar:$out/share/java/Help.jar -d${toString stdenv.hostPlatform.parsed.cpu.bits}"
     '';
 
     dontStrip = true;