NOTE: This section is not complete. These are just rough notes.
The Font Editor is present in stock VARKON, but its access through the menu system is commented out. Here's how I enabled it using the English menus (thanks to Dr. Kjellander for his advice on this).
cd $VARKON_ROOT/mdf/english
Edit "menus.INC"
To enable the font editor menu, go to "m23" ("TEXT") and uncomment the "font-editor" line. Change the position of the menu's closing semicolon as well. So this original (VARKON 1.17D):
m23 = "TEXT"
"left",f50
"right",M113
"centre ",M114
"2 positions",M115;
! "font-editor",m93;
becomes this:
m23 = "TEXT"
"left",f50
"right",M113
"centre ",M114
"2 positions",M115
"font-editor",m93;
The Font Editor menu itself is "m93".
m93 = "FONT_EDITOR"
"template",p176
"points ",f20
"draw",M177
"move",p178
"genererate file",m94;
Button "template" calls a module named by t-string "176" This t-string is defined in "texts.INC as "fe_mall", which is the template-creating MBS function in the font editor sources.
The font related t-strings from "texts.INC" are:
t176 = "fe_mall" t177 = "fe_drawm" t178 = "fe_move" t179 = "fe_tknfil" t180 = "fe_fntfil"
Going back to the FONT_EDITOR menu, the "points" button calls built-in function number 20. The functions are listed in the VARKON Documentation -> VARKON User's Manual -> Interactive Functions. f20 is "2D Create Point" (it corresponds to MBS poi_free()).
The "draw" button calls an MBS Macro named by t-string "177", which is (see above) "fe_drawm".
The "move" button calls the MBS function named by t-string "178". This is "fe_move", one of the font editor MBS functions.
Finally (for this menu) the "generate file" button chains to menu "m94". This menu contains:
m94 = "GENERERATE FILE"
"this char",M179
"all char",M180;
Menu "m94" has two buttons which invoke MACRO modules identified by t-strings "179" and 180". These are (see above) defined in "texts.INC" as "fe_tknfil" and "fe_fntfil".
Note: This is just one way to do it.
I created a project "font", with an active module "main".
Main Menu 2D -> Create -> Text -> Font Editor -> Template
VARKON will prompt for the ASCII value of the character, and for the string value of the character itself. A font template will then appear.
The Active Module now contains:
BASIC DRAWING MODULE main(); BEGINMODULE part(#1,fe_mall(49, "1")); ENDMODULE
Where "49" is the ASCII value of the character I chose and "1" happens to be its text.
So MBS function fe_mall is the template function.
The font editor function sources are in "$VARKON_ROOT/sources/Vlib/fonts/fedit". They are:
fe_draw.MBS fe_drawm.MBS Macro to draw a line fe_fntfil.MBS write out an entire font fe_mall.MBS template generator fe_move.MBS fe_tknfil.MBS write out a single character jkc.SOV
When the editor is invoked, a file is also created in the job directory called "fedit.ONR" which holds the "ordningsnummer" This file initially contains "1 "
To draw a line, first enter two points
MAIN_MENU_2D -> Create -> Text -> Font Editor -> Point -> Absolute
enter the coordinates; I'll use (1000,1000) here You can now go back and view/edit the MBS, which contains:
part(#1,fe_mall(49, "1")); poi_free(#2,vec(1000, 1000));
Enter another coordinate (I did this in MBS):
part(#1,fe_mall(49, "1")); poi_free(#2,vec(1000, 1000)); poi_free(#3,vec(9000, 1000));
The point (pun intended) to make is that the Font Editor menu item "template" just calls the MBS function "fe_mall", and the button "points" just calls the built-in point drawing function (f20) which is the same as the MBS function "poi_free" The VARKON "Font Editor" is not some special editing program; it's just a regular VARKON drawing session.
More later...
The fragments VARKON code and of the VARKON user interface are a part of VARKON and thus bear their VARKON copyrights and are licensed under the GNU General Public License. The VARKON source code is publicly available at http://www.tech.oru.se/cad/varkon/
The rest of this document is copyright © 2003 by David M. MacMillan.
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