The raster pipeline takes a GridCoverage and turns it into a Graphics2D object.
see net.refractions.udig.render.features

Functional Requirements

• Accept a GridCoverage as input
• Style the input
• Reproject the input
• Output a Graphics2D object

Non-Functional Requirements

• Perform deformations on the input
• Give output within two seconds

Design Notes

• When zooming in, the raster pipeline will attempt to give immediate feedback by performing a manual zoom on the selected area (within one second). It will then go and get the actual requested object (within three to five seconds).
• When zooming out, it will return the image used before the zoom-in was performed, if one is available.