eqn2graph - convert an EQN equation into a cropped image
eqn2graph reads a one-line eqn(1) equation from the
standard input and writes an image file, by default in Portable Network
Graphics (PNG) format, to the standard output.
The input EQN code should not be preceded by the .EQ
macro that normally precedes it within groff(1) macros; nor do you
need to have dollar-sign or other delimiters around the equation.
Arguments not recognized by eqn2graph are passed to the
ImageMagick or GraphicsMagick program convert(1). By specifying
these, you can give your image a border, set the image's pixel density, or
perform other useful transformations.
The output image is clipped using convert's -trim
option to the smallest possible bounding box that contains all the black
- Write the image in output-format, which must be understood by
convert; the default is PNG.
- Display a usage message and exit.
- Display version information and exit.
- These environment variables are searched in the given order to determine
the directory where temporary files will be created. If none are set,
/tmp is used.