5.5 GFtoDVI: Character proofs of fonts
GFtoDVI makes "proof sheets" from a GF bitmap file as output by, for
example, Metafont (Note: Metafont). This is an indispensable aid for
font designers or Metafont hackers. Synopsis:
gftodvi [OPTION]... GFNAME[gf]
The font GFNAME is searched for in the usual places (Note: Glyph
lookup.). To see all the relevant paths, set
the environment variable `KPATHSEA_DEBUG' to `-1' before running the
The suffix `gf' is supplied if not already present. This suffix is
not an extension, no `.' precedes it; for instance, `cmr10.600gf'.
The output filename is the basename of GFNAME extended with `.dvi',
e.g., `gftodvi /wherever/foo.600gf' creates `./foo.dvi'.
The characters from GFNAME appear one per page in the DVI output,
with labels, titles, and annotations, as specified in Appendix H
(Hardcopy Proofs) of `The Metafontbook'.
GFtoDVI uses several fonts besides GFNAME itself:
* "gray font" (default `gray'): for the pixels that actually make up
the character. Simply using black is not right, since then labels,
key points, and other information could not be shown.
* "title font" (default `cmr8'): for the header information at the
top of each output page.
* "label font" (default `cmtt10'): for the labels on key points of
* "slant font" (no default): for diagonal lines, which are otherwise
simulated using horizontal and vertical rules.
To change the default fonts, you must use `special' commands in your
Metafont source file, typically via commands like `slantfont slantlj4'.
There is no default slant font since no one printer is suitable as a
default. You can make your own by copying one of the existing files,
such as `.../fonts/source/public/misc/slantlj4.mf' and then running
`mf' on it.
For testing purposes, you may it useful to run `mf rtest' (hit
RETURN when it stops) to get a `gf' file of a thorn glyph. Or use
`mfw' instead of `mf' to have the glyph(s) displayed on the screen.
After that, `gftodvi rtest.2602gf' should produce `rtest.dvi', which
you process as usual.
The program accepts the following option, as well as the standard
`-verbose', `-help', and `-version' (Note: Common options):
Typeset the so-called overflow labels, if any, POINTS TeX points
from the right edge of the character bounding box. The default is
a little over two inches (ten million scaled points, to be
precise). Overflow equations are used to locate coordinates when
their actual position is too crowded with other information.
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