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Re: Write PNG from plots with different color tables?? [message #69868] Tue, 02 March 2010 16:17 Go to previous message
penteado is currently offline  penteado
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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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