Re: [Jmagick] [JAI-IMAGEIO] Google summer of code and imageio

On Wed, 26 Mar 2008, Simone Giannecchini wrote:
> My suggestion would be creating a module specific for JMAGICK which
> would handle most part of the mechanics plus some plugins for the
> formats we want to support and the support for metadata we want to
> implement (not much at the beginning I guess :-)).

An approach would be to re-implement ImageMagick "pixel cache" storage 
in Java.  ImageMagick would then invoke a callback to "persist" any 
pixels which are read in a native Java image.  When writing, 
ImageMagick would invoke a callback to retrieve the pixels to write. 
While processing an image, ImageMagick would use the same callbacks to 
retrieve and store pixels.  Since Java would need to copy the pixels, 
there would be some added overhead.

There is already a "pixel stream" interface in ImageMagick which 
exposes some of this, but unfortunately, it still stores its own 
pixels, which doubles memory requirements.

This approach assumes that the images are not too large for Java to be 
able to allocate memory for them.

Bob
======================================
Bob Friesenhahn
[bfriesen@masked-domain], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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