term% cat index.txt JF(9.1) JF(9.1)
NAME
jf - font editor
SYNOPSIS
jf [ file ] ...
DESCRIPTION
Jf edits jerq font files. If file does not begin with a slash and is
not a font file, it is looked up in a standard font directory.
Jf is mostly mouse- and menu-driven, except when prompting for file
names. Jf divides its layer into two types of areas: The font displays
show all characters in a given font in actual size; when characters are
opened for editing, they appear magnified in edit displays.
Button 1
is the `do it' button. Clicking button 1 inside a font display opens a
character for editing; inside an edit display it sets a pixel. It may
have other functions selected via menus, in which case the function is
indicated by a special cursor.
Button 2
is the `undo it' button. Clicking button 2 closes a character or
clears a pixel, unless conditioned otherwise via menu selection.
Button 3
is the `menu' button. Clicking button 3 selects a menu, pops control
back to the top level, or (when the gunsight cursor shows) picks a font
or character to be affected. Sometimes menu selection is the only
(non-trivial) option available, as indicated by a `menu' cursor.
A font is described by several parameters; these are either read from
the font file, or set by default by the make new font function: max
width (default 16 pixels), height (16)-measured from the top, ascent
(16)-the distance of the printing baseline from the top, and range
(1)-the highest-numbered character in the font. (The first character
is numbered 0.) All may be changed under the set sizes menu. Squeeze
font, in the open/close font menu, reduces max width as much as possi‐
ble.
Each character has a width, which is shown by the length of the base‐
line in the edit display. Char width may be set under the set sizes
menu; button 1 sets it to 0, button 2 sets it to a specified pixel
within the max width. Char left may be used for kerning; if made posi‐
tive, it shifts a character right and causes max width to increase if
necessary; if negative, the character will be shifted left. Otherwise
char left is irrelevant to font editing.
The bit function menu controls copying among characters in any of the
bitblt(9.3) Codes, F_STORE, F_CLR, F_OR, or F_XOR. Press button 3 on
the source character; hold it down while moving and release it on the
destination.
Several fonts may be open at once. When editing a font, it is often
convenient to open a second copy for recovering botched characters.
FILES
/usr/jerq/font/* jerq fonts
/usr/jerq/include/font.h jerq font header file
DIAGNOSTICS
The most common problem is running out of memory or screen area, in
which case the offending operation is simply ignored. A small number
of self-explanatory messages deal with errors on file I/O.
SEE ALSO
font(9.5)
JF(9.1)