Fontman makes it very easy to create your own font, also for export. This concerns minifonts as well. Clearly, you can always temporarily modify your current font in the Character browser (key 42.3), valid until the next warmstart if no precautions have been made, see Remark 1 below. But creating a new font means more. After character modification it has to be given new font parameter, i.e., a new font name and font number or font ID which is a number. This is readily done with pressing the command SetFP on the font in level 1. Then the right-hand dialog screen appears. The old font paramenter are the intial values in the two dialog fields, waiting on change. Font parameter are parts of the font itself. You recognize the old parameter also in the dialog box header which informs on the font size, in addition, The same can be done with minifonts but in a different dialog screen. Fontman contains also a powerful font browser. You can toggle the builtin fonts, recall the current font, and each sort of a font can easily made the actual one The package includes as an example of a self-made font LFONT7.F. Fontman has been tested under ROM versions 19-6 and 1.22 on the HP49G+.
What is new ?
Version 8.2003: Double-click replaced by longhold to maintain one version for both the HP49 and HP49+.
Version 7.2003: command menu modified. MiniF normally clicked is a minifont viewer, double-clicked a minifont editor.
Version 6.2003: FPAR renamed to SetFP
Version 3.2003: System font toggler added, MFed and MFVw on the same key with double-click.
FIRST version 1.2003 (January 2003)
Fontman has a one-page menu with the commands
Font-> SetFP SelFt SyFt~ MiniF ->Font
described below. Read this description carefully. It refers as usual to RPN mode only.
Font-> Recalls the current font. A minifont can be recalled with MiniF. Instead of modifying the currend font directly in the Character browser (key 42.3) you may also press DownArrow on it after recalling it to the stack. The advantage is that you may give it a new identiy with SetFP below. SetFP
Looks for a font on the stack with perhaps already modified, to give it a new name and new font ID. Just overwrite the old ones as illustrated in the screen-shot above. The new name can be any string, even empty, The chosen ID will be recalculated modulo 256, the maximal font ID. It should actually be < 245 provided the font is destinated for export. The reason is that the font ID is used by the font stylers under EDIT/Style. These stylers do correctly interprete a font ID only if it is < 245. A font has also a font size, the maximal hight of characters in pixels, 6, 7 or 8, which cannot be changed for obvious reason. SelFt
A browser on all external fonts and minifonts in the builtin ports. It none is found, SelFt offers only the next builtin font smaller to the current one. Port names of fonts or minifonts must have the shape Name.F since SelFt looks for port names with suffix .F only. Pressing the selected font or minifont makes it the actual one. For having some external font available for comparison, store the included Lfont7.F in port 2, say. Since a font takes over 2 KB, we suggest to store it as a self-decompressing object, see Remark 2 below. SyFt~ Cycles through the three builtin fonts in descending order. The valid font is displayed in the Header. MiniF
If normally clicked views the current minifont and returns it to the stack.While viewing one may browse through the screen with the arrow keys. If MiniF is hold a bit longer it edits the current minifont as displayed in the screen-shot. A minfont has no font name but only a font ID. The builtin minifont has ID 0, to be changed with the Rightshift or Leftshift key. The actual ID is visible in the menu area. Character browsing is done with + and -. Each littls square represents one pixel. The screen-shot scans just the $-symbol and we clearly see how it was made. With the arrow keys one can modify a scanned characters. +/- toggles the black/white square. The backspace key blanks the character. Browsing on + and - has a Slow/Fast choice on key S, displayed in the menu area. Important: The edited minifont is returned to the stack only if some character has been modified. You can set the modified minifont as your personal minifont but also offer it to the public. ->Font Make a font or minifont from the stack the actual font or minifont, respectively.
Remark1. If you want a self-made or imported font to remain stable after a warmstart you must tell this to STARTUP. Similarly for imported minifonts.
Remark 2. SelFt strenghtens the builtin font browser in that it looks also for minifonts, and you need not search in the memory. A font or minifont can be a self-decompressing code, easily made with the BZ-tools from OT49(+). Self-decompression does not depend on the presence of this library but is simply done by EVAL. One has only to take care that a port name evaluating to a font has the suffix .F to be included in the font browser of Fontman.
Wolfgang Rautenberg - firstname.lastname@example.org - www.math.fu-berlin.de/~raut
CREDITS. The minifont tools stem essentially from MNF v1.3 by Philippe Pamart. The program of SetFP uses character string processing, an idea of Joseph K. Horn.