OpenRaster

OpenRaster

Filename extension	.ora
Internet media type	image/openraster[1]
Latest release	0.0.6 (draft)[2]
Type of format	Layered raster graphics
Extended from	OpenDocument
Open format?	Yes
Website	OpenRaster Specification at openraster.org

OpenRaster is a

for OpenRaster files is ".ora".

Background

The

Requirements

Following features should be present:

General

• full freely available documentation
• OpenDocument type of file format (archive with multiple files inside)
• extensible, but private undocumented extensions should be excluded, any extension should be added to the spec and documentation of the file format
• applications are not expected to support all features of the file format, but when manipulating the file they should not lose any information they cannot handle

Metadata

• storage of metadata using {XMP – Dublin Core – IPTC} tags
• possibility of storing metadata tags per layer
• storage of Exif tags
• all text data in Unicode (UTF-8 or UTF-16)

Layers

• storage of multiple layers
• storage of each layer's coordinates
• storage of blending (compositing) options for each layer
• storage of adjustment layers
• storage of layer effects
• groups of layers
• color information – profile, colorspace

Other

See^[8]

• storage of paths, clipping paths and text on path
• selections and masks
• embedding documents within OpenDocument frameworks
• support undo, history of commands and actions (like PSD)

Proposals and extensions

• palette
• embedded fonts (proposal to extension)
• multiple pages
• animation support using multiple pages and a timer (like PSD)

Challenges

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According to the draft specification (as of October 2010), a major challenge for a cross-application format is that because not all of the features are available in all the programs, an image won't be displayed the same way in different applications, especially for adjustment/filters layers.

A likely work-around is the optional storage of a redundant extra layer containing the fully rendered pixel data as seen after all image processing, or possibly a lower-resolution snapshot of it suitable for previewing and thumbnailing.

Different implementations levels might be defined, like, tiny, simple, small, normal, full and custom.

Application support

OpenRaster has limited support in a few graphics programs and among these its cross-application use is not seamless.^{[citation needed]}

Application	Baseline	SVG
DrawPile	Supported[9]	Yes
Chasys Draw IES	Supported[10]	Yes
GIMP	Basic support since version 2.8[11]	No
Inkscape	Unsupported
Krita	Supported[12][13]	No
LazPaint	Reading since version 5.0 and writing since 5.2[14]	Yes
MyPaint	Default working file format[15]	Yes
Nathive	Default format since 0.908[16]
Pinta	Supported starting with version 0.4[17]	No
XnView	Supported through a user-made plugin[18]
Scribus	Supported starting with version 1.5[19]	No
ImageMagick	Supported starting with version 7.0.10-26[20]	Yes
Paint.net	Supported through a user-made plugin[21]	No

See also

• Create Project
• openraster.org
• Libre Graphics Meeting
• free and open source software
• GIMP
• Krita
• FXG

References

External links

• Specification website
• Git repository
• OpenRaster on the Create Project wiki at the Wayback Machine (archived February 22, 2012)
• pippin's website at gimp.org - OpenRaster at the Wayback Machine (archived March 17, 2008)
• Integration of GIMP OpenRaster into mainline