Editing RISC OS (section)

=== Font manager ===
RISC OS was the first operating system to provide scalable anti-aliased fonts.<ref>{{cite web |url=http://www.osnews.com/story/6170/Emulating_RISC_OS_under_Windows/page1/ |title=Emulating RISC OS under Windows |access-date=12 May 2011 |last=Round |first=Mark |date=26 February 2004 |work=OSnews |quote=Many of the UI concepts that we take for granted were first pioneered in RISC OS, for instance: scalable anti-aliased fonts and an operating system extendable by 'modules', while most of the PC world was still on Windows 3.0. |archive-date=14 November 2010 |archive-url=https://web.archive.org/web/20101114004250/http://www.osnews.com/story/6170/Emulating_RISC_OS_under_Windows/page1/ |url-status=live }}</ref><ref>{{cite web |url=http://telcontar.net/Misc/GUI/RISCOS/ |title=The RISC OS GUI |access-date=12 May 2011 |last=Ghiraddje |date=22 December 2009 |publisher=Telcontar.net |quote=Only with Mac OS X did any mainstream graphical interface provide the smoothly rendered, fractionally spaced type that Acorn accomplished in 1992 or earlier. |archive-date=16 July 2011 |archive-url=https://web.archive.org/web/20110716233538/http://telcontar.net/Misc/GUI/RISCOS/ |url-status=live }}</ref><ref>{{cite web |url=https://arstechnica.com/old/content/2005/05/gui.ars/6 |title=A History of the GUI |access-date=25 May 2011 |first=Jeremy |last=Reimer |date=May 2005 |publisher=[[ArsTechnica]] |quote=[...] in 1987, the UK-based company Acorn Computers introduced their [...] GUI, called "Arthur", also was the first to feature anti-aliased display of on-screen fonts, even in 16-color mode! |archive-date=2 December 2011 |archive-url=https://web.archive.org/web/20111202061840/http://arstechnica.com/old/content/2005/05/gui.ars/6 |url-status=live }}</ref><ref>{{cite web |url=http://www.osnews.com/story/21713/Screen_Fonts_Shape_Accuracy_or_On-Screen_Readability_ |title=Screen Fonts: Shape Accuracy or On-Screen Readability? |access-date=13 June 2011 |first=Thom |last=Holwerda |date=23 June 2005 |publisher=[[OSNews]] |quote=[...] it was RISC OS that had the first system-wide, intricate [...] font rendering in operating systems. |archive-date=19 November 2011 |archive-url=https://web.archive.org/web/20111119223926/http://www.osnews.com/story/21713/Screen_Fonts_Shape_Accuracy_or_On-Screen_Readability_ |url-status=live }}</ref> Anti-aliased fonts were already familiar from Arthur, and their presence in RISC OS was confirmed in an early 1989 preview,<ref name="PCW 1989-01">{{cite news | first1=Dick | last1=Pountain | title=Screentest: Archie RISC OS | work=[[Personal Computer World]] | date=January 1989 | url=http://chrisacorns.computinghistory.org.uk/docs/Mags/PCW/PCW_Jan89_RISCOS.pdf | page=154 | access-date=4 March 2021 | quote=[ArcDraw] can also add text in multiple sizes and fonts to a drawing (including anti-aliased fonts) | archive-date=13 June 2021 | archive-url=https://web.archive.org/web/20210613044349/http://chrisacorns.computinghistory.org.uk/docs/Mags/PCW/PCW_Jan89_RISCOS.pdf | url-status=live }}</ref> featuring in the final RISC OS 2 product, launched in April 1989.<ref name="acornuser198902">{{ cite news | url=https://archive.org/details/AcornUser079-Feb89/page/n10/mode/1up | title=RISC OS is ready for April launch | work=Acorn User | date=February 1989 | access-date=31 October 2020 | pages=9 }}</ref>

A new version of the font manager employing "new-style outline fonts" was made available after the release of RISC OS,<ref name="acornuser198904_fonts">{{ cite news | url=https://archive.org/details/AcornUser081-Apr89/page/n8/mode/1up | title=New fonts for DTP | work=Acorn User | date=April 1989 | access-date=3 May 2021 | pages=7 }}</ref> offering full support for the printing of scalable fonts, and was provided with Acorn Desktop Publisher.<ref name="acornuser198910">{{ cite news | url=https://archive.org/details/AcornUser087-Oct89/page/n135/mode/2up | title=Hold the Font Page | work=Acorn User | date=October 1989 | access-date=14 April 2021 | last1=Bell | first1=Graham | pages=134–135 }}</ref> It was also made available separately and bundled with other applications.<ref name="acornuser199004_font">{{ cite news | url=https://archive.org/details/AcornUser093-Apr90/page/n20/mode/1up | title=Acorn Customer Hotline | work=Acorn User | date=April 1990 | access-date=2 May 2021 | pages=19 }}</ref> This [[outline font]] manager provides support for the rendering of font outlines to bitmaps for screen and printer use, employing [[spatial anti-aliasing|anti-aliasing]] for on-screen fonts, utilising sub-pixel anti-aliasing and caching for small font sizes.<ref name="raine1991">{{ cite conference | url=https://archive.org/details/1989-proceedings-5th-comp-graphics-workshop/page/25/mode/1up | title=The Acorn Outline Font Manager | last1=Raine | first1=Neil | last2=Seal | first2=David | last3=Stoye | first3=William | last4=Wilson | first4=Roger | conference=Fifth Computer Graphics Workshop | location=Monterey, California | date=November 1989 | publisher=USENIX Association | pages=25–36 }}</ref> At the time of the introduction of Acorn's outline font manager, the developers of rival desktop systems were either contemplating or promising outline font support for still-unreleased products such as Macintosh [[System 7]] and [[OS/2]] version 2.<ref name="acornuser198911_mytype">{{ cite news | url=https://archive.org/details/AcornUser088-Nov89/page/n69/mode/2up | title=My Type | work=Acorn User | date=November 1989 | access-date=7 May 2021 | last1=Bell | first1=Graham | pages=68–69 }}</ref>

From 1993, starting with the German RISC OS 3.12, and in 1994 for RISC OS 3.5, it has been possible to use an outline anti-aliased font in the WindowManager for UI elements, rather than the [[Bitmap fonts|bitmap system font]] from previous versions.<ref>{{cite magazine
| date        = July 1993
| title       = Acorn signs pre-press deal
| url         = https://archive.org/details/AcornUser132-Jul93/page/n11/mode/2up
| magazine    = [[Acorn User]]
| page        = 10
| publisher   = [[Addison-Wesley]]
| access-date =
}}</ref><ref name="acorn_an253">{{ cite tech report | url=http://chrisacorns.computinghistory.org.uk/docs/Acorn/AN/253.pdf | title=Acorn Computers Support Group Application Notice 253 – New features of RISC OS version 3.5 | publisher=Acorn Computers Limited | last1=Murphy | first1=Dean | date=29 March 1994 | access-date=2 March 2022 | issue=0.02 }}</ref> RISC OS 4 does not support [[Unicode]] but "RISC OS 5 provides a Unicode Font Manager which is able to display Unicode characters and accept text in [[UTF-8]], UTF-16 and UTF-32. Other parts of the RISC OS kernel and core modules support text described in UTF-8."<ref>{{cite web|url=http://www.riscos.info/index.php/Unicode_in_RISC_OS|title=Unicode in RISC OS|work=riscos.info|access-date=28 April 2015|archive-date=11 April 2015|archive-url=https://web.archive.org/web/20150411221409/http://www.riscos.info/index.php/Unicode_in_RISC_OS|url-status=live}}</ref><!--

There are two issues:         
                                                                                                                                  
1) Printing Unicode to a PostScript printer will break as PDriverPS just
   embeds the Fonts:Encodings.UTF8 encoding file directly in the PS             
   output. This file is not valid PostScript.                                   
                                                                                
2) Printing UTF-16 or UTF-32 to any printer driver will fail as they're         
   not expecting anything other than an 8-bit encoding.[..]

Issue 1 can be avoided by using the PostScript 3 printer driver (instead of using the native RISC OS PostScript printer driver) which was developed by John Tytgat and Martin Würthner. The ROOL project has released updated Printer Manager software which fixes issue 2.-->

Support for the characters of RISC OS (and some other historic computers) was added to [[Unicode]] 13.0 (in 2020).<ref>{{Cite web|url=https://www.unicode.org/versions/Unicode13.0.0/ch22.pdf|title=The Unicode® Standard Version 13.0 – Core Specification|access-date=11 March 2020|archive-date=6 May 2021|archive-url=https://web.archive.org/web/20210506122306/https://www.unicode.org/versions/Unicode13.0.0/ch22.pdf|url-status=live}}</ref>