Hi, I have continued my work on supporting text.usetex for the PDF backend by parsing dvi files. It "sort of" works now, with the following caveats: - Your TeX distribution must have a kpsewhich command and a correctly configured pdftex.map file. This is true for modern distributions on Unix; I have no idea about Windows. - TeX "virtual fonts" are not supported yet; Computer Modern should work, but Times will usually not. Truetype fonts also are not yet supported (for usetex; they are for ordinary text). - Re-encoded fonts (in pdftex.map) probably do not work properly, and "font effects" such as slanting do not work. - Bounding boxes are not quite right. - The embedded Type 1 fonts are not subsetted, so output files are unnecessarily big. - The resulting PDF files sometimes crash Preview.app on OS X, and even if it doesn't crash, it doesn't show the fonts. There is probably some problem in the embedding, but xpdf, gv, and Adobe Reader seem to show the files just fine. To enable, rename _draw_tex to draw_tex in backend_pdf.py and set text.usetex to True. -- Jouni K. Seppänen http://www.iki.fi/jks
The usetex support in pdf is now a little better, so I am enabling it now. At least it is more entertaining than NotImplementedError... I have fixed some of the biggest problems (the broken font embedding causing crashes of Preview.app, and the lack of virtual font support). It still makes some assumptions about the TeX distribution: you need kpsewhich and pdftex.map, so on TeX Live or (I presume) teTeX you are fine, but I have no idea about Windows. Transformations of Type-1 fonts are not implemented, so if you try to use $\alpha$ with Times, TeX typesets an alpha from Symbol and slants it, but you get the non-slanted version. Fixing this (and adding subsetting support) probably requires a complete Type-1 parser. There is support for baseline alignment, but it is based on finding the baseline of the lowest character, so subscripts will throw it off. A good solution will require some TeX magic. Reports of bugs (or successes) are welcome. -- Jouni K. Seppänen http://www.iki.fi/jks
Hi Jouni,
On Thursday 13 September 2007 02:38:25 am Jouni K. Sepp=E4nen wrote:
> The usetex support in pdf is now a little better, so I am enabling it
> now. At least it is more entertaining than NotImplementedError...
>
> I have fixed some of the biggest problems (the broken font embedding
> causing crashes of Preview.app, and the lack of virtual font support).
> It still makes some assumptions about the TeX distribution: you need
> kpsewhich and pdftex.map, so on TeX Live or (I presume) teTeX you are
> fine, but I have no idea about Windows.
>
> Transformations of Type-1 fonts are not implemented, so if you try to
> use $\alpha$ with Times, TeX typesets an alpha from Symbol and slants
> it, but you get the non-slanted version. Fixing this (and adding
> subsetting support) probably requires a complete Type-1 parser.
>
> There is support for baseline alignment, but it is based on finding the
> baseline of the lowest character, so subscripts will throw it off. A
> good solution will require some TeX magic.
>
> Reports of bugs (or successes) are welcome.
I tried the following, with the latest svn checkout and usetex=3DTrue:
plot([1,2])
savefig('test.pdf')
and I get an error, the tail end is:
/usr/lib64/python2.5/site-packages/matplotlib/backends/backend_pdf.py in=20
writeFonts(self)
468 elif filename.endswith('.pfb') or=20
filename.endswith('.pfa'):
469 # a Type 1 font; limited support for now
=2D-> 470 fontdictObject =3D self.embedType1(filename,=20
self.fontInfo[Fx])
471 else:
472 realpath, stat_key =3D get_realpath_and_stat(filena=
me)
/usr/lib64/python2.5/site-packages/matplotlib/backends/backend_pdf.py in=20
embedType1(self, filename, fontinfo)
501 fh.close()
502
=2D-> 503 fh =3D open(fontinfo.afmfile, 'rb')
504 matplotlib.verbose.report(
505 'Reading metrics from ' + fontinfo.afmfile, 'debug')
IOError: [Errno 2] No such file or directory: ''
Darren
Darren Dale <dd...@co...> writes:
> I tried the following, with the latest svn checkout and usetex=True:
> plot([1,2])
> savefig('test.pdf')
> and I get an error, the tail end is:
[...]
> --> 503 fh = open(fontinfo.afmfile, 'rb')
> IOError: [Errno 2] No such file or directory: ''
Could you update from svn, set verbose.level to debug, run your example
again, and email me the output? Also, which TeX distribution do you
have?
--
Jouni K. Seppänen
http://www.iki.fi/jks
It turns out (thanks to Darren for the debug info) that AFM files do not exist for all fonts in all current TeX distributions, so I have modified the pdf backend to not use them. This loses some information that is required by the pdf spec (such as the x-height and stem widths of the embedded font) but at least in some tests Preview.app and Adobe Reader don't seem to mind. -- Jouni K. Seppänen http://www.iki.fi/jks
On Sunday 30 September 2007 04:16:08 pm Jouni K. Sepp=E4nen wrote: > It turns out (thanks to Darren for the debug info) that AFM files do not > exist for all fonts in all current TeX distributions, so I have modified > the pdf backend to not use them. This loses some information that is > required by the pdf spec (such as the x-height and stem widths of the > embedded font) but at least in some tests Preview.app and Adobe Reader > don't seem to mind. Jouni, I just ran tex_demo.py, which I modified to yield a pdf. The result= s=20 are really impressive. In an earlier post you mentioned that transformation= s=20 of Type-1 fonts probably requires a complete type-1 parser. Do you mean=20 matplotlib's ft2font is missing some functionality? Darren
Darren Dale <dd...@co...> writes: > In an earlier post you mentioned that transformations of Type-1 fonts > probably requires a complete type-1 parser. Do you mean matplotlib's > ft2font is missing some functionality? I don't think freetype has any support for modifying and outputting fonts. Actually the transformations are probably just a matter of locating and modifying the FontMatrix entry in the cleartext part of the pfb file, but subsetting (to reduce file sizes) is more involved. -- Jouni K. Seppänen http://www.iki.fi/jks