![]() ![]() Whitespace between the key, the separator, and the value is allowed. The key and the separator : must be on the same line.The key must be given at the start of the line.In a key, the - and the _ are considered equivalent.It starts with a key followed by the separator :, and a value.Ī key consists only of ASCII letters, ASCII digits, the underscore _, the dash -, or the full stop. The comment may contain any character that is allowed in a yaff file.Ī property can span multiple lines.The line ending does not form part of the comment.Further whitespace characters do form part of the comment.If the first character after # is whitespace, it does not form part of the comment. ![]() # must be the first character of the line inline comments are not allowed.CommentsĪ line starting with a hash # contains a comment only. Yaff files consist of glyph definitions, properties and comments.Įach of these components is optional an empty file is a valid (if pointless) yaff file. The line separators u+2028 and u+2029, or.Control characters (Unicode category Cc) other than whitespace and line endings as defined above,.Whitespace consists of spaces ( u+0020) and tabs ( u+0009).Lines must be terminated by one of the following line endings:.A byte-order mark ( u+FEFF) may be included at the start of the file.Yaff files must be text files encoded as UTF-8. # Glyphs don't need to be the same width or Multiple code points may define a grapheme cluster # Multiple labels of the same type are OK. # We're only going to give a unicode code point for Or for example just a text label. # We've got three kinds of labels: unicode, codepage, and Each type of label is optional. # The letter A is the first letter of the Latin alphabet. In the spirit of human-friendliness, a short example is probably more informative than the full specification. Bitmap fonts are small computers are fast and have tons of memory. Colour/greyscale fonts and anti-aliasing.Able to represent Unicode fonts as well as codepage fonts.Names, acknowledgements and style specification, but also font metrics that affect the way the font is displayed. Formats such as BDF contain a wealth of metadata such as Preserves comments, metadata and metrics.Able to represent fixed-width and proportional fonts.We should avoid duplication of information, unless it is of obvious use to a human user. Immediately visualised, easy on the eye, and light and obvious syntax. ![]() Human-readable formats, but let's not kid ourselves. The yaff format has the following design aims: Other bitmap font tools you could use in conjunction with (or instead of) monobit include: Monobit contains code from Simon Tatham's mkwinfont and dewinfont. Monobit and the yaff specification are released under the (R) - requires reportlab, install with pip3 install reportlab. (P) - requires PIL, install with pip3 install Pillow. font=VGASYS.FON python3 banner.py monobit. ![]() This is similar to the ancientīanner commands included in GNU and BSD Unixes.įor example: python3 banner.py monobit. The banner utility renders text to standard output in a given font. The modify utility reads a font file, performs an operation on it and writes it out.Ĭheck python3 modify.py -h for usage. Some font formats contain multiple fonts whereas others can contain only one the converter will write multiple files to a directory or archive if needed. The converter transparently reads and writes gz, bz2, or xz-compressed font files and can readĪnd write zip and tar archives. Read font from standard input as C-source and write to standard output as BDF. Read font in PSF format and write to disk as image in PNG format. Read font in BDF format and write to standard output as Unifont HEX. Recognise the source file format from "magic bytes" or suffix (here, a Windows font) and write fonts Here are some examples of how to use the conversion utility.ĭisplay usage summary and command-line options Monobit can be used as a Python package or as a command-line tool. A specificationĪ a working Python 3 installation is required and some formats or features require additional packages to be installed see Dependencies below. Roman Czyborra's hexdraw, Simon Tatham's mkwinfont and John Elliott's psftools. Monobit's native format is yaff, a human-friendly, text-based visual format similar to the ones used by The monobit tools let you modify bitmap fonts and convert between several formats. Tools for working with monochrome bitmap fonts ![]()
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