Short:        HarfBuzz 15.1.0 text shaping library
Author:       Serkan Dursun
Uploader:     Serkan Dursun <blasterreal gmail com>
Type:         util/libs
Version:      15.1
Requires:     68020+, AmigaOS 3.1+
Architecture: m68k-amigaos >= 3.1.0
Distribution: Aminet

harfbuzz.library is HarfBuzz 15.1.0 (2026), the OpenType text shaping
engine used by Firefox, Chrome, LibreOffice and Android, as a shared
library for AmigaOS 3. It comes from AAText (util/wb/AAText) but is a
library for any program.

A program gives it a font and a line of Unicode text; HarfBuzz answers
which glyphs to draw and where:
- kerning from the GPOS table (most fonts made since about 2010 have
  no other kerning),
- ligatures (fi, ffl) and other OpenType features (small caps, old
  style figures, ...), switched on and off per call,
- accents placed on their letters,
- Arabic and Hebrew (right to left), the scripts of India and South-East
  Asia, Hangul, and every other script HarfBuzz knows.
Drawing the glyphs is up to the program (FreeType, freetype2.library or
anything else); harfbuzz.library does not need FreeType.

Built with HB_MINI: OpenType shaping only (no 'kern' table, no Apple
AAT, no Graphite, no subsetting or glyph drawing). TrueType, OpenType/
CFF, collections and variable fonts. 126 functions of the HarfBuzz API,
called exactly like HarfBuzz on any other system: the headers in
Developer/include make each call a jump through the library vector.

- All calls are serialised by one semaphore, so any number of tasks may
  use the library.
- Memory from an exec pool; a call runs on a 32 KB stack of its own when
  the caller has less than 12 KB left.
- Output is the same as HarfBuzz 15.1.0 on a PC (tested); 532 malformed
  fonts of HarfBuzz's fuzzing set: no crash, no leak.
- Speed (WinUAE, 68060 JIT, 16 px): about 2400 lines of 78 characters
  per second with Source Sans 3, 7500 with DejaVu Sans.

Installation
  Copy Libs/harfbuzz.library LIBS:
(Libs/harfbuzz.library.060 is the 68060 build, copy it as
LIBS:harfbuzz.library; the .debug build prints to the serial port.)

For programmers
Developer/ has the headers (proto, inline, fd and the HarfBuzz headers),
harfbuzz_SDK.txt (calling convention, Unicode text, memory, stack,
tasks) and Examples/ with the source of the tools. Examples/hbshape.c
is a complete program:

  m68k-amigaos-gcc -m68020 -O2 -noixemul -Iinclude \
      -o hbshape Examples/hbshape.c

Tools
  hbshape   glyphs and positions of a line of text
  hbinfo    shapes test strings, prints the result in font units
  hbbench   lines and characters shaped per second
  hbfuzz    feeds malformed fonts to the library
Details in harfbuzz.txt.

License: HarfBuzz "Old MIT" (LICENSE.harfbuzz.txt), its Universal
Shaping Engine data MIT, Microsoft (LICENSE.ms-use.txt); the library
around it MIT (LICENSE.txt). Source: https://github.com/Sdursun/AAText