Complex Script Functionality: Difference between revisions

From Scribus Wiki
Jump to navigation Jump to search
Line 42: Line 42:
'''Tibetan Line breaking''':
'''Tibetan Line breaking''':
The ''primary'' line break opportunity in Tibetan script text is after character U+0F0B which occurs between every word in Tibetan.
The ''primary'' line break opportunity in Tibetan script text is after character U+0F0B which occurs between every word in Tibetan.
===Examples:===
The string U+0F43 U+0F77  (གྷཷ)  should render:

Revision as of 16:31, 28 July 2008

Things we require for testing Complex Script Functionality

  • Sample text files encoded in UTF8
  • Sample screenshots of Scribus 1.3.3. or 1.3.4cvs rendering these incorrectly.
  • Sample fonts that we can get that are freely available that have the ability to be used for DTP.
  • Sample screenshots of any application rendering the same text correctly

An important point to note is we need comparable information. Same texts, same fonts etc and screenshots (png or tiff please) of said texts and fonts. --Cbradney 18:40, 25 Feb 2005 (UTC)

  • Other usefull contribution would be mapping of the languages you're interested in with its script/lang pair in OpenType Font style.

example : French:latn:FRA

To help, you can have a look at http://www.microsoft.com/typography/developers/OpenType/scripttags.aspx for script tags and http://www.microsoft.com/typography/developers/OpenType/languagetags.aspx for lang tags. --Pmarchand 13:46, 8 April 2007 (CEST)

Arabic & Urdu

Free fonts for Arabic / Urdu are available by Crulp and by PakType. Licensing is GPL at PakType and Crulp has also very loose license.

Tibetan & Dzongkha

Script & Language System tags:

  • Tibetan:tibt:TIB
  • Dzongkha:tibt:DZN

Font: Jomolhari, a free Tibetan script font suitable for publishing is available from Jomolhari font - OFL License. This font also works well with OO.org 2.4.x & Inkscape.

The following OpenType features should be processed to support Tibetan script:

  • ccmp - Glyph Composition / Decomposition (Composition = GSUB lookup type 4 & Decomposition = GSUB lookup type 2).
  • blws - Below-base Substitutions (GSUB lookup type 4)
  • abvs - Above-base Substitutions (GSUB lookup type 4)
  • calt - Contextual Alternates (GSUB lookup type 6)
  • blwm - Below-base Mark Positioning (GPOS lookup type 4,5)
  • abvm - Above-base Mark Positioning (GPOS lookup type 4,5)
  • kern - Kerning - (GPOS lookup type 2 or 8)

Note: The current version of the Jomolhari font uses only ccmp, blws, abvs, calt, and kern features. In kern only GPOS lookup type 2 (pair-adjustment) is used in this font ~ so this is the only kind of GPOS lookup used.

Tibetan Line breaking: The primary line break opportunity in Tibetan script text is after character U+0F0B which occurs between every word in Tibetan.

Examples:

The string U+0F43 U+0F77 (གྷཷ) should render: