I want to convert my standalone formulas to PNG to display these formulas on my website. What I am doing is the following \starttext \startTEXpage \startformula e^{i x} = \cos x + i \sin x \stopformula \stopTEXpage \stoptext and process this via texexec --pdf to get a PDF file. I tried to convert the resulting PDF file via gswin32c to png but the resulting PNG output is not so good. Then I read dvipng could do the job, which means I have to produce dvi output via texexec --dvi but than I get complaints from dvips that it cannot find the file tex.pro for the specials. However a png file is produced. Help appreciated TIA Wim
On 7/12/07, w.neimeijer@hccnet.nl
I want to convert my standalone formulas to PNG to display these formulas on my website.
What I am doing is the following
\starttext \startTEXpage \startformula e^{i x} = \cos x + i \sin x \stopformula \stopTEXpage \stoptext
and process this via texexec --pdf to get a PDF file. I tried to convert the resulting PDF file via gswin32c to png but the resulting PNG output is not so good.
Are you using the current version of gs? There have been changes to the font rendering over the years, so you want to try a current version. A quick way to get a second opinion is to install the emacs+auctex bundle for Win32 to see how you like the preview images. What does "not so good" mean -- there are lots of parameters to adjust anti-aliasing, color models, and resolution with gs, but I'm not sure about things like gamma. ImageMagick's convert may provide an easier interface. If you are using pk fonts you may encounter problems if the fonts resolution isn't "compatible" with the output resolution.
Then I read dvipng could do the job, which means I have to produce dvi output via texexec --dvi but than I get complaints from dvips that it cannot find the file tex.pro for the specials. However a png file is produced.
Help appreciated
In the long run, using pdf has the advantage that the tools are supported
by a much wider community than the small set of people who have heard of
.dvi format. The number of people who would be affected by a problem in
gs rendering is orders of magnitude larger than the number who would
notice a problem with dvipng. The latter group can always switch to pdf and
gs, while the former group doesn't have viable alternatives. As a result,
assuming the problem is not related to TeX-specific font formats, it is very
likely that gs can do what you need today and that future version on future
platforms will also "work".
If you are still having problems, provide a minimal example (.tex
source and .png
image) along with the software versions so others can try to reproduce
the problem.
--
George N. White III
Try this: gs -sDEVICE=png16m -r200 -sOutputFile=formula.png -dBATCH -q -dNOPAUSE -dGraphicsAlphaBits=4 -dTextAlphaBits=4\ -dMaxBitmap=50000000 formula.pdf You may play with -r parameter. You can also make a big picture and downsize it with proper interpolation. ZS On Thu, 12 Jul 2007 21:28:32 +0200 (CEST) w.neimeijer@hccnet.nl wrote:
I want to convert my standalone formulas to PNG to display these formulas on my website.
What I am doing is the following
\starttext \startTEXpage \startformula e^{i x} = \cos x + i \sin x \stopformula \stopTEXpage \stoptext
and process this via texexec --pdf to get a PDF file. I tried to convert the resulting PDF file via gswin32c to png but the resulting PNG output is not so good.
Then I read dvipng could do the job, which means I have to produce dvi output via texexec --dvi but than I get complaints from dvips that it cannot find the file tex.pro for the specials. However a png file is produced.
Help appreciated
TIA Wim
___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________
On 7/12/07, zs
Try this:
gs -sDEVICE=png16m -r200 -sOutputFile=formula.png -dBATCH -q -dNOPAUSE -dGraphicsAlphaBits=4 -dTextAlphaBits=4\ -dMaxBitmap=50000000 formula.pdf
You may play with -r parameter. You can also make a big picture and downsize it with proper interpolation.
These incantations come from ghostscript's "Use.htm" document.. If you don't need color, you can try "-sDEVICE=pnggray". Note that this uses anti-aliasing, which looks better on a screen but may cause problems on typical laserprinters (some may refuse to print, others will try to render the grays by dithering).
On Thu, 12 Jul 2007 21:28:32 +0200 (CEST) w.neimeijer@hccnet.nl wrote:
I want to convert my standalone formulas to PNG to display these formulas on my website.
What I am doing is the following
\starttext \startTEXpage \startformula e^{i x} = \cos x + i \sin x \stopformula \stopTEXpage \stoptext
and process this via texexec --pdf to get a PDF file. I tried to convert the resulting PDF file via gswin32c to png but the resulting PNG output is not so good.
Then I read dvipng could do the job, which means I have to produce dvi output via texexec --dvi but than I get complaints from dvips that it cannot find the file tex.pro for the specials. However a png file is produced.
Help appreciated
TIA Wim
___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________
--
George N. White III
Also on gs8.57 device png48 ie gs -dNOPAUSE -sDEVICE=png48 -r300x300 -sOutputFile=test.png test.pdf -c quit 48 bit color ! -- luigi ---------------------------------------------------------------- If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net
On Thu, 12 Jul 2007, w.neimeijer@hccnet.nl wrote:
I want to convert my standalone formulas to PNG to display these formulas on my website.
What I am doing is the following
\starttext \startTEXpage \startformula e^{i x} = \cos x + i \sin x \stopformula \stopTEXpage \stoptext
and process this via texexec --pdf to get a PDF file. I tried to convert the resulting PDF file via gswin32c to png but the resulting PNG output is not so good.
Then I read dvipng could do the job, which means I have to produce dvi output via texexec --dvi but than I get complaints from dvips that it cannot find the file tex.pro for the specials. However a png file is produced.
Yes, tex.pro is missing from the context standalone distribution. I had just copied the corresponding file from Miktex to the correct directory in the standalone distribution. However, since you only need the dvi, you can use texexec --dvi --nobackend HTH, Aditya
participants (5)
-
Aditya Mahajan -
George N. White III -
luigi scarso -
w.neimeijerï¼ hccnet.nl -
zs