Re: [opennms-discuss] SVG mapping for OpenNMS

[Derek G. <dgl...@il...>]

On Thu, 2003-01-30 at 09:04, Seth Leger wrote:
> Did you try the old headless Java flag to get Batik to render using the 
> virtual framebuffer? Add this system property flag to the java command 
> that starts OpenNMS and see if that allows you to run without a DISPLAY up.
> 
> -Djava.awt.headless=true
> 
> This flag is necessary for other Batik lib transcoding operations that 
> I've seen so it should probably eliminate this caveat.

From everything I've seen, including experience, the "headless" option
doesn't actually allow the AWT methods that require an Xserver to
operate without an Xserver - instead the flag causes the JVM to fail
with a "HeadlessException" instead of some other, less descriptive
exception when one of the head-required methods is attempted.

Batik's Transcoder NEEDS an Xserver to successfully operate, at least
under certain conditions.  (It seems like if you're using images or
text.  If all you're doing is drawing lines, it appears to work ok
without.  Although I didn't work very long at seeing what the necessary
conditions were, so I could very well be wrong.)

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
#!/usr/bin/perl -w
$_='while(read+STDIN,$_,2048){$a=29;$b=73;$c=142;$t=255;@t=map
{$_%16or$t^=$c^=($m=(11,10,116,100,11,122,20,100)[$_/16%8])&110;
$t^=(72,@z=(64,72,$a^=12*($_%16-2?0:$m&17)),$b^=$_%64?12:0,@z)
[$_%8]}(16..271);if((@a=unx"C*",$_)[20]&48){$h=5;$_=unxb24,join
"",@b=map{xB8,unxb8,chr($_^$a[--$h+84])}@ARGV;s/...$/1$&/;$d=
unxV,xb25,$_;$e=256|(ord$b[4])<<9|ord$b[3];$d=$d>>8^($f=$t&($d
>>12^$d>>4^$d^$d/8))<<17,$e=$e>>8^($t&($g=($q=$e>>14&7^$e)^$q*
8^$q<<6))<<9,$_=$t[$_]^(($h>>=8)+=$f+(~$g&$t))for@a[128..$#a]}
print+x"C*",@a}';s/x/pack+/g;eval 

usage: qrpff 153 2 8 105 225 < /mnt/dvd/VOB_FILENAME \
    | extract_mpeg2 | mpeg2dec - 

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