It seems that this could be bug in textpath.py that picks up wrong
glyph. Unfortunately, I cannot spend much time on this until the end
of this week.
As a matter of fact, I'm far from an expert on this issue. While I
wrote the textpaht.py, the code is largely based on the code in the
pdf_backend and svg_backend. So, I hope someone who is more
knowledgeable than me step in.
On the other hand, it seems that some glyph-name related bug has
recently fixed in the amsfont. And, this might be related to the
current issue.
http://mirror.math.ku.edu/tex-archive/fonts/amsfonts/doc/README
I'm not sure what version of amsfont you're using but, can you try to
update them to newest 3.0.2 version? And see if that makes any change?
I'll try to look into this later this week.
Regards,
-JJ
···
On Tue, Nov 3, 2009 at 10:26 PM, tcb <thecolourblue+m@...149...> wrote:
hi,
i took a quick look at what is going on here- but I have still not quite
found the problem. From tracing things back into the ft2font code, it seems
that the wrong glyph index is getting passed in or used somewhere. I put
this debugging code into ft2font.cpp in "FT2Font::load_glyph"#define MAX_LEN 1024
unsigned char bf[MAX_LEN];
FT_Get_Glyph_Name(face, glyph_index, bf, MAX_LEN);
std::cout << "FT2Font::load_glyph " << __FILE__ << ":" << __LINE__ << " "
<< glyph_index << " "
<< num << " "
<< face->family_name << " "
<< face->style_name << " "
<< FT_Get_Postscript_Name(face) << " "
<< "[ " << bf << " ]"
<< std::endl;I modified your example demo_text_path2.py to just load the single symbol
'\pi' instead '\left[\sum_{n=1}^\infty\frac{-e^{i\pi}}{2^n}\right]' - and
the output I get is this from the command line:FT2Font::load_glyph src/ft2font.cpp:1159 25 0 Computer Modern Medium CMMI12
[ xi ]so, it seems to pick the correct font but the wrong glyph name (xi instead
of pi)- I am not sure what the index should be. What gets displayed is the
'\xi' symbol- you can see from the first output I sent that '\pi' has been
replaced by '\xi' - the indexes of all the symbols are just offset by one, I
think.If the correct glyph index is being passed to ft2font, then it could very
well be a problem with freetype.regards
On Tue, Nov 3, 2009 at 6:19 PM, tcb <thecolourblue+m@...149...> wrote:
Hi,
Yes, with the pdfbackend, and using just the plain text code (with
usetex=True), the correct output is produced (for Text but not TextPath). I
modified your demo_text_path2.py to draw with text, and attached the output.This is the terminal output from running your attached code. I am using
the texlive 2009 distribution- which appears to be working fine, I have not
noticed any problems at all. What is the difference between the bluesky and
amsfonts?texname, type1name, enc, char_id
cmex10
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmex10.pfb
None CMEX10-34
cmsy10
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmsy10.pfb
None CMSY10-49
cmex10
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmsy10.pfb
None CMEX10-88
cmmi12
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmmi12.pfb
None CMMI12-110
cmr17
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmr17.pfb
None CMR17-61
cmr17
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmr17.pfb
None CMR17-49
cmsy10
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmr17.pfb
None CMSY10-0
cmmi12
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmr17.pfb
None CMMI12-101
cmmi12
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmr17.pfb
None CMMI12-105
cmmi12
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmr17.pfb
None CMMI12-25
cmr17
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmr17.pfb
None CMR17-50
cmmi12
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmr17.pfb
None CMMI12-110
cmex10
/usr/local/texlive/2009/texmf-dist/fonts/type1/public/amsfonts/cm/cmr17.pfb
None CMEX10-35
phvr8r
/usr/local/texlive/2009/texmf-dist/fonts/type1/urw/helvetic/uhvr8a.pfb
/usr/local/texlive/2009/texmf-dist/fonts/enc/dvips/base/8r.enc
Nimbus%20Sans%20L%20Regular-2regards,
On Tue, Nov 3, 2009 at 2:50 PM, Jae-Joon Lee <lee.j.joon@...149...> wrote:
On Tue, Nov 3, 2009 at 4:23 AM, tcb <thecolourblue+m@...149...> wrote:
> and if I convert the dvi with dvipng, it all seems in order
> (demo_text_path_tex.png). I haven't looked closely into how the
> textpath
> stuff works, but I thought it would read the dvi as a path, and display
> that
> on the screen- if that is correct then I dont know how it ends up
> displaying
> a different symbol from what is in the dvi file.Well, dvi files only contains the name of the tex font. What textpath
does is to pick up corresponding type I font and convert them to path
using the freetype library (as far as I know, this is what dvipng and
matplotlib pdf backend does). So, my guess is that, textpath is
somehow picking up wrong fonts, or wrong glyphs.The code works fine at least in my mac os X tiger w/ texlive 2008, and
in ubuntu with texlive 2007.
As I don't have any access to mac os X 10.6, it would be hard to track
down what is wrong. Here are a few more test I wish you to run.*) Check if pdf backend produces a correct result. Do not use textpath
example, but simply use text command with usetex=True, and see if the
pdf output is okay. FWIW, the textpath code is largely borrowed from
the pdfbackend.*) Run the attached code, and post the terminal output. The output is
basically the name of the tex font and the name of the substituted
type1 font, etc. For your reference, here is my output.texname, type1name, enc, char_id
cmex10
/usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmex10.pfb
None CMEX10-34
cmsy10
/usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmsy10.pfb
None CMSY10-49
cmex10
/usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmsy10.pfb
None CMEX10-88
cmmi12
/usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmmi12.pfb
None CMMI12-110
cmr17 /usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmr17.pfb
None CMR17-61
cmr17 /usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmr17.pfb
None CMR17-49
cmsy10
/usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmr17.pfb
None CMSY10-0
cmmi12
/usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmr17.pfb
None CMMI12-101
cmmi12
/usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmr17.pfb
None CMMI12-105
cmmi12
/usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmr17.pfb
None CMMI12-25
cmr17 /usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmr17.pfb
None CMR17-50
cmmi12
/usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmr17.pfb
None CMMI12-110
cmex10
/usr/local/texlive/2008/texmf-dist/fonts/type1/bluesky/cm/cmr17.pfb
None CMEX10-35
pncr8r
/usr/local/texlive/2008/texmf-dist/fonts/type1/urw/ncntrsbk/uncr8a.pfb
/usr/local/texlive/2008/texmf-dist/fonts/enc/dvips/base/8r.enc
Century%20Schoolbook%20L%20Roman-232Regards,
-JJ