From 9728d1e997ca040aa2645a2d840666bfe9aba72e Mon Sep 17 00:00:00 2001
From: Alejandro Penedo Ramos <icedfiend@gmail.com>
Date: Wed, 14 Dec 2016 20:54:14 +0100
Subject: [PATCH] Add option to change screen resolution using an environment
 variable

---
 Dockerfile       | 1 +
 README.md        | 2 ++
 supervisord.conf | 2 +-
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 1fff3a3..68b0926 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,6 +15,7 @@ ENV LC_ALL C.UTF-8
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US.UTF-8
 ENV TZ=Europe/Zurich
+ENV SCREEN_RESOLUTION 1024x768
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
 # Add the octave repo
diff --git a/README.md b/README.md
index 0dfd8db..33f7fb9 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,8 @@ The Octave GUI have to be accessed through a browser in a noVNC windows.
 * `firefox http://localhost:8083`
 * octave is launched, just run some script e.g. my_sombrero.m
 
+Adding the parameter `-e SCREEN_RESOLUTION=<width>x<height>` the screen size displayed is adjusted to the one in the environment variable. By default it is 1024x768.
+
 ### Manual Build
 
 * `docker build -t epflsti/octave-x11-novnc-docker:latest .`
diff --git a/supervisord.conf b/supervisord.conf
index f451e14..3d50bd3 100644
--- a/supervisord.conf
+++ b/supervisord.conf
@@ -2,7 +2,7 @@
 nodaemon=true
 
 [program:X11]
-command=/usr/bin/Xvfb :0 -screen 0 1024x768x24
+command=/usr/bin/Xvfb :0 -screen 0 %(ENV_SCREEN_RESOLUTION)sx24
 autorestart=true
 
 [program:x11vnc]