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Re: Object Graphics fonts [message #39667 is a reply to message #39240]

Tue, 08 June 2004 09:41

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

"Michael Wallace" wrote...
>> I have found that rendering to the screen provides far better results
than
>> rendering to IDLgrBuffer (IDLgrBuffers are rendered using the software
>> renderer). And better graphics adapters will do the anti-aliasing for
you
>> (check your graphics adapter settings). Render to the screen, read the
>> window, and save as PNG.
>
> Hmmm... interesting. Things do look better using and IDLgrWindow,
> however is it possible to use the hardware rendering without a display
> screen? This plot will be part of an automated process, so there will
> never been a screen available.

That's a stickler... As you found out you do need some sort of display.

> Of course the fallback plan is to start up Xvfb and let IDL create its
> windows there, unless someone knows a better solution.

This would only work if IDL was able to use the hardware renderer with Xvfb
and I don't think it can (just a guess). You can also configure VNC as a
dummy X server but I haven't done this myself and there still is the
question of hardware rendering.

Unless quality and speed are paramount, I would probably render to a very
large buffer and resample the image yourself (as David suggested). Probbaly
isn't worth mucking with Xvfb or VNC when you don't even know if it will
work.

-Rick

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[Message index]

		Object Graphics Fonts By: jamiesmyth_uni on Mon, 03 May 2004 14:54
		Re: Object Graphics fonts By: Karl Schultz on Tue, 08 June 2004 14:15
		Re: Object Graphics fonts By: Michael Wallace on Wed, 09 June 2004 12:46
		Re: Object Graphics fonts By: Rick Towler on Wed, 09 June 2004 11:42
		Re: Object Graphics fonts By: Rick Towler on Tue, 08 June 2004 09:41
		Re: Object Graphics fonts By: David Fanning on Mon, 07 June 2004 20:18
		Re: Object Graphics fonts By: Michael Wallace on Wed, 09 June 2004 13:15
		Re: Object Graphics fonts By: Michael Wallace on Mon, 07 June 2004 19:59
		Re: Object Graphics fonts By: Michael Wallace on Mon, 07 June 2004 15:12
		Re: Object Graphics fonts By: Rick Towler on Mon, 07 June 2004 14:36
		Re: Object Graphics fonts By: Michael Wallace on Mon, 07 June 2004 14:15
		Re: Object Graphics fonts By: David Fanning on Mon, 07 June 2004 12:56
		Re: Object Graphics fonts By: David Fanning on Wed, 09 June 2004 14:51
		Re: Object Graphics fonts By: Karl Schultz on Wed, 09 June 2004 14:35
		Re: Object Graphics fonts By: Karl Schultz on Wed, 09 June 2004 14:11
		Re: Object Graphics fonts By: Michael Wallace on Thu, 10 June 2004 09:01
		Re: Object Graphics fonts By: David Fanning on Wed, 09 June 2004 13:06
		Re: Object Graphics fonts By: David Fanning on Thu, 10 June 2004 09:07

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