I am using matplotlib SVN revision 6810, and GSview 4.9 for Windows.
Paul
Michael Droettboom wrote:
> Which version of matplotlib and ghostscript are you using? With
> matplotlib SVN trunk and gs 7.07, I can't reproduce this here, either
> with your provided ps file or generating it myself.
>
> Paul Novak wrote:
>> Hello,
>>
>> I am having some problems with the PS backend. I used the following
>> script to create a PostScript file
>>
>> #!/usr/bin/env python
>> import matplotlib
>> matplotlib.use('PS')
>> import matplotlib.pyplot as plt
>> import numpy
>>
>> x1 = numpy.arange(0,5)
>> y1 = x1
>> plt.plot(x1, y1)
>> plt.savefig('ps_backend.ps')
>> plt.show()
>>
>>
>> When I tried to open the PostScript file in GSview, there is the
>> following warning, and the file does not render properly. I have
>> attached the PostScript file and a screenshot of the incorrect rendering.
>>
>> DSC Error
>> At line 233:
>> %%Page: 1 1
>> This %%Page: line occurred in the trailer, which is not legal.
>> EPS files should be encapsulated in %%BeginDocument / %%EndDocument.
>> If is possible that an EPS file was incorrectly encapsulated,
>> and that we have been confused by the %%Trailer in an EPS file.
> Something is leading Ghostscript to believe this is an encapsulated
> postscript file when it isn't. That's odd. Did you change the
> extension of the file or something?
>>
>>
>> The error can be eliminated by removing the line with %%EOF at line
>> 230, but I don't know anything about PostScript or if that change
>> would have any other effects. I only found this solution after
>> comparing with the output from the Cairo backend. The same change to
>> PostScript output can be achieved with the following diff (from svn
>> diff), but again, I don't know if it is appropriate.
>>
>> Index: ttconv/pprdrv_tt.cpp
>> ===================================================================
>> --- ttconv/pprdrv_tt.cpp (revision 6810)
>> +++ ttconv/pprdrv_tt.cpp (working copy)
>> @@ -1070,7 +1070,6 @@
>> } /* end of if Type 42 not understood. */
>>
>> stream.putline("FontName currentdict end definefont pop");
>> - stream.putline("%%EOF");
>> } /* end of ttfont_trailer() */
>>
>> /*------------------------------------------------------------------
> I'm surprised that this works, as the %%EOF comments are generally just
> considered informational. But it doesn't hurt to remove this line (and
> save 6 bytes per file!) so I'm fine with removing this line if we can
> confirm this is the source of the error.
>
> Mike
>>
>>
>> Paul Novak
>>
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