Using PyGame to display on specified screen

[D.M. Procida]

I have a Raspberry Pi, and I want to get PyGame to display output on the
attached 7" touchscreen, no matter how I launch the script to do this.

If I launch it from a terminal shell while using the 7" screen, it
works.

If I launch it using an SSH session, I get a "pygame.error: Unable to
open a console terminal" from pygame.display.init().

If I launch it from a terminal shell in a VNC session, it displays in
the VNC display.

Here's relevant part of the script:

import pygame
import os

os.environ['SDL_VIDEODRIVER'] = 'fbcon'
os.environ["SDL_FBDEV"] = "/dev/fb0"

pygame.init()

pygame.display.init()

So far, the only way I can get this to work is to launch the script
with:

DISPLAY=:0 python pygame_example.py

It seems that setting the os.environ values in the script has no effect
whatsoever.

What is the correct way to do this?

Daniele

[Alex Potter]

ssh -t ?


--
Alex

[D.M. Procida]

Alex Potter <spa...@alepot.org> wrote:

> > If I launch it using an SSH session, I get a "pygame.error: Unable to
> > open a console terminal" from pygame.display.init().
> >

> > So far, the only way I can get this to work is to launch the script
> > with:
> >
> > DISPLAY=:0 python pygame_example.py
> >
> > It seems that setting the os.environ values in the script has no effect
> > whatsoever.
> >
> > What is the correct way to do this?

> ssh -t ?

Same result. But in any case, I was hoping to manage this in the script
itself. It seems reasonable that a program should be able to determine
where its own output goes.

Daniele

[alister]

perhaps creating a bash script containing your working example.

this would be in keeping with the unix philosophy of combining simple
tools that each perform as single task (well)



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Caveats: it's GNOME, be afraid, be very afraid of the Depends line
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