1. Introducing a Bitmap Interchange Format
OpenDocument Raster
Introducing a Bitmap Interchange Format

2. OpenDocument file formats
ODF already supports lots of file types
text .odt
spreadsheets .ods
vector graphics .odg
but... advanced bitmap graphics are missing!
The goal of ODR: fill up this gap
At the same time, proposing a graphics format: OpenRaster

3. Why a new image format?
Current image formats are not suitable for interchange
jpeg, png: no layers, limited colorspace support
tiff: binary, difficult to expand, proprietary
kra, xcf: serialisations of internal application structures
Interchange being one of the key phrases...
kra: Krita file format (xml + binary info) xcf: The Gimp file format (binary info)

4. Key elements of OpenRaster
OpenRaster needs:
a complex layer stack (pixel layers, effect layers)
standardised operations (merge, blend, ...)
full color management (CMYK, RGB, Lab, HDR, ...)
meta-information

5. The link to OpenDocument
Lots of graphics applications
No standardised open bitmap file format
Sharing images means degrading them
ODF is extensible, open, and offers a good infrastructure
Why reinvent the wheel?

6. OpenRaster vs OpenDocument Raster
OpenRaster: open graphics interchange format
OpenDocument Raster: OpenDocument "container"

7. The roadmap March 2006 start defining OpenRaster
June public release of first draft by Boudewijn Rempt (Krita)
August to October creation of the layer stack structure
From November start writing the specification

8. Preview Compositing and applying effects are non-destructive.
<image>
<layers>
<layer x='50' y='5'>
<dropshadow radius='10' x='10' y='10' opacity='0.5'/>
<layer src='data/OpenRaster.png'/>
</layer>
<layer y='50'>
<invert/>
<brightness-contrast brightness='0.0' contrast='0.8'/>
<scale x='1.0' y='2.0'/>
<layer src='data/romedalen.jpg'/>
</layers>
</image>

9. More information Mailing list create@freedesktop.org Websites
The actual draft: