TrueType fonts under PIL

I have been writing a python script that automatically makes
button  
images from text files and I have some questions about the
TrueType  
font rendering in PIL 1.1.6 under Python 2.5 under Win32
(used the  
installer).

I have been having some issues with glyphs either not
rendering  
completely or not rendering at all(the ones that I have
noticed are  
'_' and the descender (http://en.wiki
pedia.org/wiki/Descender) for  
lower case 'g'). After some playing around, I found that
this seems to  
be mostly dependent on font size. Depending on which font I
use, the  
size at which everything renders correctly changes but they
render  
correctly at some sizes and don't when I use other sizes.

Does anyone have any suggestions on what I can do to improve
TrueType  
font rendering without changing the font size?

Thanks for your time,

Tim

Environment Information:
Windows XP SP2
Python 2.5 (.msi version from python.org)
PIL 1.1.6 (downloaded .msi for python 2.5)

Font: I've tried several, but the one that I have been using
most is  
IPA Mona Gothic (ipag-mona.ttf) which is a Japanese language
font  
available from http://www.geocitie
s.jp/ipa_mona/ and I believe that it  
is used in several FOSS projects.
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goattirfa.com schrieb:
> I have been writing a python script that automatically
makes button  
> images from text files and I have some questions about
the TrueType  
> font rendering in PIL 1.1.6 under Python 2.5 under
Win32 (used the  
> installer).
>
> I have been having some issues with glyphs either not
rendering  
> completely or not rendering at all(the ones that I have
noticed are  
> '_' and the descender (http://en.wiki
pedia.org/wiki/Descender) for  
> lower case 'g'). After some playing around, I found
that this seems to  
> be mostly dependent on font size. Depending on which
font I use, the  
> size at which everything renders correctly changes but
they render  
> correctly at some sizes and don't when I use other
sizes.
>
> Does anyone have any suggestions on what I can do to
improve TrueType  
> font rendering without changing the font size?
>
> Thanks for your time,
>
> Tim
>
> Environment Information:
> Windows XP SP2
> Python 2.5 (.msi version from python.org)
> PIL 1.1.6 (downloaded .msi for python 2.5)
>
> Font: I've tried several, but the one that I have been
using most is  
> IPA Mona Gothic (ipag-mona.ttf) which is a Japanese
language font  
> available from http://www.geocitie
s.jp/ipa_mona/ and I believe that it  
> is used in several FOSS projects.
> _______________________________________________
> Image-SIG maillist  -  Image-SIGpython.org
> htt
p://mail.python.org/mailman/listinfo/image-sig
>
>   
Hello Tim,
I've loaded ipag-mona.ttf fontfile into PIL via the aggdraw
library (an 
extension for Pil, that does not use PIL to load the font)
with an 
identical result to yours. Migtht be that the fontfile is
buggy, I've 
never had troubles with displaying .ttf fonts in PIL.

Joachim

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I think that I figured out why things didn't look like I
wanted.

I am writing text on a template gif image and wasn't
converting it to  
a RGB image. In order to get the text to show up, I was
changing the  
image's palette to include black (rgb(0,0,0)) and then using
that new  
palette color to write text on the image. Since the truetype
fonts  
seem to be rendered in greyscale rather than monochrome,
anything that  
wasn't pure black wouldn't show up on the final image.

When I work with RGB bmp files, everything looks wonderful
but looks  
horrible when I re-encode the bmp to gif.

So the moral of the story seems to be: be careful about
writing  
truetype text in monochrome.

Tim

Quoting Joachim Thöne <rijothgmx.de>:

> goattirfa.com schrieb:
>> I have been writing a python script that
automatically makes button  
>>   images from text files and I have some questions
about the   
>> TrueType  font rendering in PIL 1.1.6 under Python
2.5 under Win32   
>> (used the  installer).
>>
>> I have been having some issues with glyphs either
not rendering    
>> completely or not rendering at all(the ones that I
have noticed are  
>>   '_' and the descender (http://en.wiki
pedia.org/wiki/Descender)  
>> for   lower case 'g'). After some playing around, I
found that this  
>>  seems to be mostly dependent on font size.
Depending on which font  
>>  I use, the  size at which everything renders
correctly changes but  
>>  they render  correctly at some sizes and don't
when I use other   
>> sizes.
>>
>> Does anyone have any suggestions on what I can do
to improve   
>> TrueType  font rendering without changing the font
size?
>>
>> Thanks for your time,
>>
>> Tim
>>
>> Environment Information:
>> Windows XP SP2
>> Python 2.5 (.msi version from python.org)
>> PIL 1.1.6 (downloaded .msi for python 2.5)
>>
>> Font: I've tried several, but the one that I have
been using most   
>> is  IPA Mona Gothic (ipag-mona.ttf) which is a
Japanese language   
>> font  available from http://www.geocitie
s.jp/ipa_mona/ and I   
>> believe that it is used in several FOSS projects.
>> _______________________________________________
>> Image-SIG maillist  -  Image-SIGpython.org
>> htt
p://mail.python.org/mailman/listinfo/image-sig
>>
>>
> Hello Tim,
> I've loaded ipag-mona.ttf fontfile into PIL via the
aggdraw library (an
> extension for Pil, that does not use PIL to load the
font) with an
> identical result to yours. Migtht be that the fontfile
is buggy, I've
> never had troubles with displaying .ttf fonts in PIL.
>
> Joachim


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