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Re: Write PNG from plots with different color tables?? [message #69868]

Tue, 02 March 2010 16:17

penteado
Messages: 866
Registered: February 2018

Senior Member
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On Mar 2, 9:06 pm, pp <pp.pente...@gmail.com> wrote:
> On Mar 2, 4:30 pm, Mark Shephard <mark.w.sheph...@gmail.com> wrote:
>
>
>
>> Hi PP,
>
>> Thanks for the prompt response. I had already tried what you
>> suggested. When I do so I get a very strange result. The top half is
>> completely black and the bottom half has the plot repeated three times
>> (still using just one of the color tables).
>
>> ----------------
>> | |
>> | BLACK |
>> | |
>> ----------------
>> | |
>> | P1 P1 P1 |
>> | |
>> ----------------

Just noticed that the default pixel depth was 8, not 24 as I thought.
So tvrd was trying to do something weird, trying to read 3 bytes for
each pixel, where there was only 1. Adding, device,/
set_pixel_depth=24, before the first plot, solves the problem.

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[Message index]

		Re: Write PNG from plots with different color tables?? By: penteado on Tue, 02 March 2010 16:17
		Re: Write PNG from plots with different color tables?? By: penteado on Tue, 02 March 2010 16:06
		Re: Write PNG from plots with different color tables?? By: Mark Shephard on Tue, 02 March 2010 11:30
		Re: Write PNG from plots with different color tables?? By: penteado on Tue, 02 March 2010 11:06
		Re: Write PNG from plots with different color tables?? By: ben.bighair on Wed, 03 March 2010 07:14
		Re: Write PNG from plots with different color tables?? By: jkeller on Wed, 03 March 2010 03:13

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