textlayout

module

v0.0.3 Latest Latest Go to latest Published: Nov 3, 2021 License: MIT

Details

Valid go.mod file

The Go module system was introduced in Go 1.11 and is the official dependency management solution for Go.
Redistributable license

Redistributable licenses place minimal restrictions on how software can be used, modified, and redistributed.
Tagged version

Modules with tagged versions give importers more predictable builds.
Stable version

When a project reaches major version v1 it is considered stable.
Learn more about best practices

Repository

github.com/benoitkugler/textlayout

Links

Open Source Insights

README ¶

Text layout library for Golang

This module provides a chain of tools to layout text. It is mainly a port of the following C libraries : Pango, fribidi, fontconfig, harfbuzz and graphite.

Overview

The package fonts provides the low level primitives to load and read font files. The selection of a font given some criterion (like language or style) is facilitated by the fontconfig package. Once a font is selected, harfbuzz is responsible for laying out a line of text, that is transforming a sequence of unicode points (runes) to a sequence of positionned glyphs. Graphite fonts are supported via the graphite package. fribidi provides support for bidirectional text : it finds the alternates LTR and RTL sequences (embedding levels) in a paragraph. Finally, pango wraps these tools to provide an higher level interface capable of laying out an entire text.

Status of the project

This project is a work in progress. Some parts of it are already usable : fribidi, fonts/truetype, harfbuzz and graphite, but breaking changes may be committed on the fly.

Licensing

This module is licensed as MIT, but some packages (fribidi, pango) are derivative work and thus licensed as LGPL.

Directories ¶

?	: This menu
/	: Search site
f or F	: Jump to
y or Y	: Canonical URL

Path	Synopsis
fontconfig Package fontconfig provides a way to list the fonts of a system and to query the best match with user defined criteria.	Package fontconfig provides a way to list the fonts of a system and to query the best match with user defined criteria.
lang Read a set of language orthographies and build Go declarations for charsets which can then be used to identify which languages are supported by a given font.	Read a set of language orthographies and build Go declarations for charsets which can then be used to identify which languages are supported by a given font.
fonts Package fonts provides supports for parsing several font formats (postscript, bitmap and truetype) and provides a common API, inspired by freetype.	Package fonts provides supports for parsing several font formats (postscript, bitmap and truetype) and provides a common API, inspired by freetype.
binaryreader Package binaryreader provides a convenient reader to decode (big endian) binary content.	Package binaryreader provides a convenient reader to decode (big endian) binary content.
bitmap Pacakge bitmap provides support for bitmap fonts found in .pcf files.	Pacakge bitmap provides support for bitmap fonts found in .pcf files.
glyphsnames copied from https://git.maze.io/go/unipdf/src/branch/master/internal/textencoding	copied from https://git.maze.io/go/unipdf/src/branch/master/internal/textencoding
psinterpreter Package psinterpreter implement a Postscript interpreter required to parse .CFF files, and Type1 and Type2 Charstrings.	Package psinterpreter implement a Postscript interpreter required to parse .CFF files, and Type1 and Type2 Charstrings.
simpleencodings Simple encodings map a subset of the unicode characters (at most 256) to a set of single bytes.	Simple encodings map a subset of the unicode characters (at most 256) to a set of single bytes.
truetype Package truetype provides support for OpenType and TrueType font formats, used in PDF.	Package truetype provides support for OpenType and TrueType font formats, used in PDF.
type1 Package type1 implements a parser for Adobe Type1 fonts, defined by .afm files (https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5004.AFM_Spec.pdf) and .pdf files (https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/T1_SPEC.pdf)	Package type1 implements a parser for Adobe Type1 fonts, defined by .afm files (https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5004.AFM_Spec.pdf) and .pdf files (https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/T1_SPEC.pdf)
type1C Package type1c provides a parser for the CFF font format defined at https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5176.CFF.pdf.	Package type1c provides a parser for the CFF font format defined at https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5176.CFF.pdf.
fribidi Package fribidi is a Golang port of the C/C++ Free Implementation of the Unicode Bidirectional Algorithm (https://github.com/fribidi/fribidi).	Package fribidi is a Golang port of the C/C++ Free Implementation of the Unicode Bidirectional Algorithm (https://github.com/fribidi/fribidi).
unidata
graphite Package graphite Graphite implements a "smart font" system developed specifically to handle the complexities of lesser-known languages of the world.	Package graphite Graphite implements a "smart font" system developed specifically to handle the complexities of lesser-known languages of the world.
harfbuzz Package harfbuzz provides advanced text layout for various scripts and languages, with font-aware substitutions and positionning.	Package harfbuzz provides advanced text layout for various scripts and languages, with font-aware substitutions and positionning.
langs Generator of the mapping from OpenType tags to BCP 47 tags && vice versa.	Generator of the mapping from OpenType tags to BCP 47 tags && vice versa.
track_reference Script aiming at checking the progress of the reference implementation, using Git.	Script aiming at checking the progress of the reference implementation, using Git.
language
pango Package pango is a port of the C library, which provides international text layout.	Package pango is a port of the C library, which provides international text layout.
color Package color implements a tool to generate the values of common colors supported by pango.	Package color implements a tool to generate the values of common colors supported by pango.
fcfonts Package fcfonts is an implementation of the font tooling required by Pango, using textlayout/fontconfig and textlayout/fonts.	Package fcfonts is an implementation of the font tooling required by Pango, using textlayout/fontconfig and textlayout/fonts.
unicodedata Package unicodedata provides additional lookup functions for unicode properties, not covered by the standard package unicode.	Package unicodedata provides additional lookup functions for unicode properties, not covered by the standard package unicode.
generate Generate lookup function for Unicode properties not covered by the standard package unicode.	Generate lookup function for Unicode properties not covered by the standard package unicode.