Support for pngcairo in draw, and backward compatibility issues

El mi?, 05-01-2011 a las 14:38 -0500, Mark H Weaver escribi?:

>  Here is a small fix to interfaces/emacs/imaxima/imaxima.lisp to use
> 'dimensions' instead:
> 

I never use emacs, and I didn't know of the existence of this problem.
It's now fixed.


> 
> Second: the {eps,pdf}_{width,height} options, formerly specified in cm,
> have been replaced by 'dimensions' which is specified in cm/100.  The
> code still accepts the old options, but fails to do the necessary
> conversion from cm to cm/100.

Certainly, there weren't any transformations here. Fixed.


> The following patch does the necessary conversion, and also silences the
> warnings about 'pic_height' and 'pic_width'.  The reason for the latter
> is that wxMaxima uses those options, and it looks bad to see the
> warnings before every inline plot.  Yet how can wxMaxima fix this bug
> without breaking support for older versions of Maxima?  I suggest that
> we wait a few releases before issuing these warnings.

Not necessarily. wxMaxima 0.8.7 has been changed appropriately; in fact,
the windows binary doesn't have this problem. I think wxMaxima's new
version will be released soon.

Since the warnings in wxMaxima will disappear in short, I prefer to
maintain them.


> Finally, attached below is a patch to add support for gnuplot's pngcairo
> terminal to draw.  The plots look much better, especially when drawing
> direction fields with drawdf.  Many small arrows look very bad without
> anti-aliasing.

Nice contribution. PNG's look really better.


> 
> This patch also includes a small hack to allow users of wxMaxima to
> easily make use of pngcairo for inline plots: if $draw_use_pngcairo is
> true, then pngcairo will be used when 'png' is requested.

I have included this variable in draw.lisp as you suggested, but I think
this fact should be controlled from wxMaxima. Let $draw_use_pngcairo be
defined here for the moment.


> [There's one other minor fix here as well: the gnuplot terminal options
>  "enhanced truecolor" were specified when drawing "png" directly, but
>  not when using $draw_file.  The following patch fixes that.]

Yes, I forgot to include this option in $draw_file.


> 
>    Thanks,
>      Mark

No, thanks to you.

--
Mario