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Date: Wed, 02 Feb 2011 02:41:52 -0500
From: "Mikhail T." <mi+thun@aldan.algebra.com>
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Subject: image-manipulation in Java without X11
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Hello!

I'm trying to port a Java-application, which sometimes needs to process 
(get dimensions, possibly -- resize) a few images. Whenever it does 
this, it needs a valid $DISPLAY in the environment, otherwise an 
exception like this is thrown:

    |java.lang.InternalError: Can't connect to X11 window server using
    ':0.0' as the value of the DISPLAY variable.
             at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
             at
    sun.awt.X11GraphicsEnvironment.access$100(X11GraphicsEnvironment.java:52)
             at
    sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:155)
             at java.security.AccessController.doPrivileged(Native Method)
             at
    sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:131)
             at java.lang.Class.forName0(Native Method)
             at java.lang.Class.forName(Class.java:169)
             at
    java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
             at
    java.awt.image.BufferedImage.createGraphics(BufferedImage.java:1135)
    |

Apparently, the first thing AWT is doing is initialize X11 -- even if it 
is not going to need X11 for anything... This makes the program (almost) 
unusable as a daemon...

I wonder if it is possible to a) make AWT a little smarter in this 
regard -- even if only on FreeBSD; or b) do image-processing in Java 
using some other classes?..

Thanks! Yours,

    -mi

||