my Latex and Tex4ht cheat sheet

2.4 How to convert pdf to eps?
See http://tex.stackexchange.com/questions/20883/how-to-convert-pdf-to-eps This inkscape input.pdf --e
works ok, but the above command gives errors such as these on some images:
>inkscape 3d_1.pdf --export-eps=3d_1.eps
** Message: Invalid glyph found, continuing...
** Message: Invalid glyph found, continuing...
** Message: Invalid glyph found, continuing...
** Message: Invalid glyph found, continuing...
** Message: Invalid glyph found, continuing...
** Message: Invalid glyph found, continuing...
** Message: Invalid glyph found, continuing...
** Message: Invalid glyph found, continuing...
While on the same file, pdf2eps below works fine.
To crop pdf also (which can be useful) use this script by Herbert from above link
#!/bin/sh
# $Id: pdf2eps,v 0.01 2005/10/28 00:55:46 Herbert Voss Exp $
# Convert PDF to encapsulated PostScript.
# usage:
# pdf2eps
pdfcrop $2.pdf
pdftops -f $1 -l $1 -eps "$2-crop.pdf"
rm "$2-crop.pdf"
mv "$2-crop.eps" $2.eps
I wrote the following simple script prep which process all the pdf image files and generates the needed files
for tex4ht.
#!/bin/bash
for file in $1; do
filename=${file%.*}
pdf2svg "$filename.pdf" "$filename.svg"
pdf2eps 1 "$filename"
done
It is called like this prep "*.pdf" or for one file prep foo.pdf it will generate a .svg and .eps for each file.
2.5 How to draw a baseline hairline for an equation?
This is thanks to @egreg from Tex stackexchange:
\newcommand{\rl}{\rlap{\vrule height 0pt depth .1pt width \textwidth}}
and then use \rl in the left hand sides of the equations.
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