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Re: How-to? color png [message #27659 is a reply to message #27658]

Mon, 29 October 2001 14:19

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Andrew Cool (andrew.cool@dsto.defence.gov.au) writes:

> You probably need to insert :-
>
> 6a) TVLCT,r,g,b,/GET ; get the current colour tables
>
> and then change 7 to be :-
>
> 7) write_png, 'image.png', data, r,g,b ; write out colour tables too!

On a super-duper Mac!? I doubt it.

More likely something like this (assuming he wants
a flat 2D PNG image):

6) data=tvrd() ; Whoops! Not on 24-bit display.
6a) data = Tvrd(True=1)
6b) image2D = Color_Quan(data, 1, r, g, b, Colors=colors, Dither=dither)
7) write_png, 'image.png', image2D, r, g, b

If he wants a 24-bit image, then:

6) data = TVRD(True=1)
7) write_png, 'image.png', data

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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[Message index]

		Re: How-to? color png By: David Fanning on Tue, 30 October 2001 16:08
		Re: How-to? color png By: Mark Hadfield on Tue, 30 October 2001 15:24
		Re: How-to? color png By: Andrew Cool on Tue, 30 October 2001 14:31
		Re: How-to? color png By: Bernard K. on Tue, 30 October 2001 01:16
		Re: How-to? color png By: Andrew Cool on Mon, 29 October 2001 14:52
		Re: How-to? color png By: David Fanning on Mon, 29 October 2001 14:24
		Re: How-to? color png By: David Fanning on Mon, 29 October 2001 14:19
		Re: How-to? color png By: Andrew Cool on Mon, 29 October 2001 13:45
		Re: How-to? color png By: David Fanning on Mon, 29 October 2001 13:41

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