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This is the README of the crtfont tool, which is part of the GraphLCD
base package.
written by Andreas Regel (andreas.regel AT powarman.de)
based on crtfont from the graphlcd plugin for the Video Disc Recorder
written by Carsten Siebholz (c.siebholz AT t-online.de)
See the file COPYING for license information.
Description:
------------
crtfont is a program to create fonts for the GraphLCD graphics library.
Installation and Configuration:
-------------------------------
see the file README in the base package's root directory.
Using crtfont:
--------------
To create a font, 2 source files are required:
- an image, that contains the characters as a bitmap. This image might
be in:
- Portable Bit Map (PBM) format.
- a description file (*.desc), that contains informations about the
positions of each character in the image.
The format of the description file:
- The first line contains the version of the description file format:
version:1
- The next lines contain the font attributes in the format
<attribute>:<value>, one attribute per line. Possible attributes
are:
fontheight: the total height of the font
fontascent: the vertical distance from the horizontal baseline to
the highest character coordinate.
lineheight: the baseline-to-baseline distance
spacebetween: additional space between characters in a text
spacewidth: the width of the space character. If this value is
greater than zero, all characters will be compressed
horizontally to their active pixels.
- All other lines define the characters and their positions in the
image. The syntax is like:
PosX_1 Char_1 PosX_2 Char_2 PosX_3 ... PosX_n Char_n EndX
where PosX_x specifies the horizontal position of the leftmost
pixel of the character. Char_x might be the character itself
(A, B, ...) or it's decimal ASCII value (65, 66, ...)
Usage: crtfont -f <format> -b <bmpfile> -d <descfile> -o <outfile>
-f --format specifies the format of the bitmap. Possible values
are:
PBM: file is an Portable Bit Map
-b --bmpfile specifies the name of the bitmap file (*.pbm)
-d --descfile specifies the name of the description file (*.desc)
-o --outfile specifies the name of the output file (*.fnt)
example: crtfont -f PBM -b f12.pbm -d f12.desc -o f12.fnt
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