Ruven's dashboard

Daniel,

OK, yes, send me the agreement.

Ruven – Ruven, on March 03, 2010 01:12

Hi Daniel,

I've added some simple parsing to your IIPImageDescriptor class to automatically get this from the server:



/**
* Create descriptor from basic info returned by IIP server.
* The response is of the form:
* Max-size:4080 3072
* Resolution-number:5
* etc...
* We only need the image size and tile size for now
*/
public static function fromBasicInfo(metadata:String, image:String, server:String=DEFAULT_SERVER):IIPImageDescriptor
{

var matches:Array = new Array()

// Max-size response
var width:uint
var height:uint
matches = metadata.match(/.*(Max-size:)([0-9\.]+) ([0-9\.]+)/)
if(matches==null) return null
if(matches.length>=4){
width = Number(matches[2])
height = Number(matches[3])
}
else return null

// Tile-size reponse
var tileWidth:uint = DEFAULT_TILE_WIDTH
var tileHeight:uint = DEFAULT_TILE_HEIGHT
matches = metadata.match(/.*(Tile-size:)([0-9\.]+) ([0-9\.]+)/)
if(matches==null) return null
if(matches.length>=4){
tileWidth = Number(matches[2])
tileHeight = Number(matches[3]);
}
else return null

var source:String = server + "?FIF=" + image

return new IIPImageDescriptor(source,
width,
height,
tileWidth,
tileHeight)

}


I notice that none of the other descriptor formats make URL connections for XML or otherwise. Only the result of the URL load is passed in, so I've also added a static function to get the appropriate metadata URL for an image given the server location and image name:



/**
* Return the IIP URL for making the image metadata request
*/
public static function getMetaDataURL(image:String, server:String=DEFAULT_SERVER):String
{
var url:String = server + "?FIF=" + image + "&obj=IIP,1.0&obj=Max-size&obj=Tile-size&obj=Resolution-number"
return url
}



Then there are some extra defaults to add in the class:


private static const DEFAULT_TILE_WIDTH:uint = 256
private static const DEFAULT_TILE_HEIGHT:uint = 256
private static const DEFAULT_SERVER:String = "/fcgi-bin/iipsrv.fcgi"


So, to use all this, you just need to load the metadata using a standard urlLoader object, then create the MultiScaleImage and assign the source like this:


image.source = IIPImageDescriptor.fromBasicInfo( metadataLoader.data, image_path, server )


I'm not sure this can be easily integrated into your ImagePyramidDescriptorFactory class, however.

Cheers,
Ruven

For access to JPEG2000 images without going through java, the IIPImage project (http://iipimage.sf.net) who provide one of the front-ends for djatoka, now also handle JPEG2000 directly in their server http://iipimage.sourceforge.net/2010/...

Like djatoka, this uses Kakadu, but is entirely written in C++, so no java overhead. As a bonus, the server is compatible with iipmooviewer, deepzoom, zoomify and several other ZUI front-ends, including of course openzoom ;-)