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 charac-
ter 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 possible.
Each character has a width, which is shown by the length of
the baseline 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
JF(9.1) JF(9.1)
left may be used for kerning; if made positive, it shifts a
character right and causes max width to increase if neces-
sary; if negative, the character will be shifted left. Oth-
erwise 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)