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: 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 gun-
sight 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. The 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. The
quantity char left may be used for kerning. If positive, it
shifts a character right and causes max width to increase if
necessary; if negative, the character will be shifted left.
JF(9.1) JF(9.1)
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, 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
jerq fonts
jerq font header file
SEE ALSO
font(9.5)
DIAGNOSTICS
When out of memory or screen area, jf ignores the offending
operation.