Editing Tgif (program)

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{{notability|Products|date=August 2012}}
{{more citations needed|date=September 2014}}
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{{Infobox software
| name                   = Tgif
| title                  = Tgif
| logo                   = <!-- Image name is enough -->
| logo caption           = 
| logo_size              = 
| logo_alt               = 
| screenshot             = Tgif Screenshot.png
| caption                = Screenshot of Tgif 2.4.5 on Ubuntu 12.04
| screenshot_size        = 
| screenshot_alt         = 
| collapsible            = 
| author                 = [http://bourbon.usc.edu/william/ William Chia-Wei Cheng]
| developer              = 
| released               = <!-- {{Start date and age|YYYY|MM|DD|df=yes/no}} -->
| discontinued           = 
| latest release version = 4.2.5 	
| latest release date    = {{release date and age|2011|06|28}}<ref>{{cite web|title=Sourceforge|date=11 April 2013 |url=http://sourceforge.net/projects/tgif/|accessdate=19 December 2013}}</ref>
| latest preview version = 
| latest preview date    = <!-- {{Start date and age|YYYY|MM|DD|df=yes/no}} -->
| frequently updated     = <!-- DO NOT include this parameter unless you know what it does -->
| status                 = 
| programming language   = [[C (programming language)|C]]
| operating system       = [[Linux]], [[RISC OS]], [[FreeBSD]], [[NetBSD]], [[Debian]], [[SunOS]]
| platform               = 
| size                   = 
| language               = English, Japanese
| language count         = 2
| language footnote      = 
| genre                  = [[Graphics software]]
| license                = [[Q Public License|QPL]]
| alexa                  = 
| website                = {{URL|http://bourbon.usc.edu/tgif/}}
| standard               = 
| AsOf                   = 
}}
'''Tgif''' (pronounced t-g-i-f) is an Xlib-based interactive 2-D drawing tool (using vector graphics) under X11 on [[Linux]] and most [[Unix|UNIX]] platforms (including [[Mac OS]] X and [[cygwin]] on Windows). It was developed in 1990 and is [[free software]] released under the [[QPL]] license.

==Quirks ==
Because Tgif was developed long before a standard way for drawing programs to work, one might find it unfamiliar to use in a number of ways:
*Although Tgif mention point sizes, it uses a unit that is 1/128 of an inch for point sizes. 
*While there is an option to display font sizes in points, the sizes are still subject to rounding to the nearest 1/128".
*Unlike modern drawing programs, Tgif uses [[spline curve]]s instead of [[Bézier curve]]s.
*Also unlike modern drawing programs, Tgif does not allow the user to select a colour from a color wheel or through controls that allow the user to adjust colour values. Instead, Tgif provides a list with a short list of colours. If the user wishes to use a colour that is not in the list, they would need to add their desired colour to the list. This list is then saved with the currently-open drawing.
*Usable fonts are listed in a configuration file. If the user wishes to use fonts that are not on the list, they would have to change the configuration file.
*Only fonts in the [[ISO 8859-1]] encoding (i.e. "square") [[CJK]] fonts and [[Symbol (typeface)|symbols]] or [[dingbat]] fonts can be used.
*Rescaling can lead to ugly defect, which is most likely due to both the use of integer coordinates and roundoff errors.
*Because Tgif uses Xlib (which predated modern [[Unicode]] support) Tgif does not and cannot support Unicode.

== The Tgif file format ==
Tgif saves drawings in a [[Prolog]]-based<ref>Tgif FAQ - Tgif File Format, http://bourbon.usc.edu/tgif/faq/format.html</ref> [[plain text]] file format. Because the program is based on Prolog,{{citation needed|date=April 2012}} there isn't a lot of support from other programs for reading the Tgif file format.

Fonts are represented as [[PostScript]] font names. Originally, it was possible to print Tgif drawings in [[batch mode]] without using an [[X11|X display]]. However, this feature changed somewhere in the 4.1 versions. Currently, in order to print drawings, the user would need to be running Tgif on an X display. This restriction cannot be applied if the drawing only uses [[Times Roman]], [[Helvetica]], [[Courier (typeface)|Courier]], and/or [[Symbol (typeface)|Symbol]] fonts.

==References==
{{Reflist}}

==External links==
* [http://bourbon.usc.edu/tgif/ Tgif home page]

[[Category:Free vector graphics editors]]
[[Category:Vector graphics editors for Linux]]