Write animated / cycling GIF's
Andrew Thompson
(screensavers).
So far I have managed to grab images of the component and
save them to disk as a *series* of images, but I was wonderring
if there is anything in the standard API that will write
them to a single 'animated GIF'*.
[ Note, there are other ways we can go to present them,
including a JS or Applet slideshow, so I am not too keen
to install something like JAI for this task, I just
thought I would check if I missed something in the
standard API. ]
* Yes, yes 'burn all GIFs' ( yada, yada.. )
--
Andrew Thompson
physci.org 1point1c.org javasaver.com lensescapes.com athompson.info
A By-Product Of The TV Industry
Andrew Thompson
> I am writing a small 'screenshot' task
[1]
>...for animated components (screensavers).
>
> So far I have managed to grab images of the component and
> save them to disk as a *series* of images, but I was wonderring
> if there is anything in the standard API that will write
> them to a single 'animated GIF'*.
>
> [ Note, there are other ways we can go to present them,
> including a JS or Applet slideshow, so I am not too keen
> to install something like JAI for this task, I just
> thought I would check if I missed something in the
> standard API. ]
>
> * Yes, yes 'burn all GIFs' ( yada, yada.. )
[1] vis.
<http://www.physci.org/codes/display.jsp?fl=/test/codejs/ScreenShot.java>
[ Note that while this code extends org.apache.tools.ant.Task,
I have not got the hang of creating Ant tasks yet. It
does not work as I expected, and thus far I have only
managed to invoke it as a java task. More delving into
the Ant docs is required.. ]
--
Andrew Thompson
physci.org 1point1c.org javasaver.com lensescapes.com athompson.info
Fun For The Whole Family (Except Grandma and Grandpa)
Andrew Thompson
A follow up to my own question..
(wonderring)
> ..is anything in the standard API that will write
> ..a single 'animated GIF'*.
No. Most probably because of that bothersome Unisys
patent[1] on the LZW compression algorithm.
> [ Note, there are other ways we can go to present them,
> including a JS or Applet slideshow, so I am not too keen
> to install something like JAI
No point. JAI can *read* Gif's, but cannot write them.
[1] My investigations led me to check the source of
this patent nonsence, Unisys. I was sure the patent
had expired, which this page suggests..
<http://www.unisys.com/about__unisys/lzw>
Unfortunately, Unisys clouds the waters by continuing to mention,
"Unisys Corporation holds and has patents pending on a
number of improvements on the inventions claimed in
the above-expired patents. .."
..they offer an email address from which to request information
on the new patent(s and applications) but so far, 3 requests
to the email provided (from two separate addresses) have
resulted in 0 information from Unisys.
> * Yes, yes 'burn all GIFs' ( yada, yada.. )
..hmmmm.
--
Andrew Thompson
physci.org 1point1c.org javasaver.com lensescapes.com athompson.info
"I got a raw deal, so I'm lookin' for a steel.." Tricky 'Black Steel'
Roedy Green
<SeeMy...@www.invalid> wrote or quoted :
>
>No. Most probably because of that bothersome Unisys
>patent[1] on the LZW compression algorithm.
has not that patent expired? In any case there is no ImageIO gif
writer builtin.
Andrew Thompson
> On Mon, 15 Aug 2005 14:06:25 GMT, Andrew Thompson
> <SeeMy...@www.invalid> wrote or quoted :
>
>>
>>No. Most probably because of that bothersome Unisys
>>patent[1] on the LZW compression algorithm.
>
> has not that patent expired? In any case there is no ImageIO gif
> writer builtin.
(trimmed, reinstated..)
[1] My investigations led me to check the source of
this patent nonsence, Unisys. I was sure the patent
had expired, which this page suggests..
<http://www.unisys.com/about__unisys/lzw>
Unfortunately, Unisys clouds the waters by continuing to mention,
"Unisys Corporation holds and has patents pending on a
number of improvements on the inventions claimed in
the above-expired patents. .."
..they offer an email address from which to request information
on the new patent(s and applications) but so far, 3 requests
to the email provided (from two separate addresses) have
resulted in 0 information from Unisys.
______________
..Do you want to try that email they offer, Roedy,
or do you have a FAX that can reach their 'Welch
Patent Licensing Department'?
--
Andrew Thompson
physci.org 1point1c.org javasaver.com lensescapes.com athompson.info
"Give me a ticket for an aeroplane, ain't got time to take a fast train.."
The Box Tops 'The Letter'