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added support for iiif 1.1

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Jon Stroop 2013-08-30 16:40:06 -04:00
parent 7f88bf78b6
commit 1c98e6ba5e
2 changed files with 225 additions and 0 deletions
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1
Gruntfile.js
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@ -34,6 +34,7 @@ module.exports = function(grunt) {
"src/tilesource.js",
"src/dzitilesource.js",
"src/iiiftilesource.js",
"src/iiif11tilesource.js",
"src/osmtilesource.js",
"src/tmstilesource.js",
"src/legacytilesource.js",

224
src/iiif11tilesource.js Normal file
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@ -0,0 +1,224 @@
/*
* OpenSeadragon - IIIF11TileSource
*
* Copyright (C) 2009 CodePlex Foundation
* Copyright (C) 2010-2013 OpenSeadragon contributors
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of CodePlex Foundation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* The getTileUrl implementation is based on Jon Stroop's Python version,
* which is released under the New BSD license:
* https://gist.github.com/jpstroop/4624253
*/
(function( $ ){
/**
* A client implementation of the International Image Interoperability
* Format: Image API Draft 0.2 - Please read more about the specification
* at
*
* @class
* @extends OpenSeadragon.TileSource
* @see http://library.stanford.edu/iiif/image-api/
*/
$.IIIF11TileSource = function( options ){
$.extend( true, this, options );
if( !(this.height && this.width && this['@id'] ) ){
throw new Error('IIIF required parameters not provided.');
}
//TODO: at this point the base tile source implementation assumes
// a tile is a square and so only has one property tileSize
// to store it. It may be possible to make tileSize a vector
// OpenSeadraon.Point but would require careful implementation
// to preserve backward compatibility.
options.tileSize = this.tile_width;
if (! options.maxLevel ) {
var mf = -1;
var scfs = this.scale_factors || this.scale_factor;
if ( scfs instanceof Array ) {
for ( var i = 0; i < scfs.length; i++ ) {
var cf = Number( scfs[i] );
if ( !isNaN( cf ) && cf > mf ) { mf = cf; }
}
}
if ( mf < 0 ) { options.maxLevel = Number(Math.ceil(Math.log(Math.max(this.width, this.height), 2))); }
else { options.maxLevel = mf; }
}
$.TileSource.apply( this, [ options ] );
};
$.extend( $.IIIF11TileSource.prototype, $.TileSource.prototype, {
/**
* Determine if the data and/or url imply the image service is supported by
* this tile source.
* @function
* @name OpenSeadragon.IIIFTileSource.prototype.supports
* @param {Object|Array} data
* @param {String} optional - url
*/
supports: function( data, url ){
return data.profile && (
"http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level0" == data.profile ||
"http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level1" == data.profile ||
"http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level2" == data.profile ||
"http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level3" == data.profile ||
"http://library.stanford.edu/iiif/image-api/1.1/compliance.html" == data.profile
);
},
/**
*
* @function
* @name OpenSeadragon.IIIF11TileSource.prototype.configure
* @param {Object|XMLDocument} data - the raw configuration
* @param {String} url - the url the data was retreived from if any.
* @return {Object} options - A dictionary of keyword arguments sufficient
* to configure this tile source via it's constructor.
*/
configure: function( data, url ){
// var service,
// options,
// host;
// options = configureFromObject( this, data );
// if( url && !options.tilesUrl ){
// service = url.split('/');
// service.pop(); //info.json
// service = service.join('/');
// if( 'http' !== url.substring( 0, 4 ) ){
// host = location.protocol + '//' + location.host;
// service = host + service;
// }
// options.tilesUrl = service.replace(
// data.identifier,
// ''
// );
// }
return configureFromObject( this, data );
},
/**
* Responsible for retreiving the url which will return an image for the
* region speified by the given x, y, and level components.
* @function
* @name OpenSeadragon.IIIFTileSource.prototype.getTileUrl
* @param {Number} level - z index
* @param {Number} x
* @param {Number} y
* @throws {Error}
*/
getTileUrl: function( level, x, y ){
//# constants
var IIIF_ROTATION = '0',
IIIF_QUALITY = 'native.jpg',
//## get the scale (level as a decimal)
scale = Math.pow( 0.5, this.maxLevel - level ),
//## get iiif size
iiif_size = 'pct:' + ( scale * 100 ),
//# image dimensions at this level
level_width = Math.ceil( this.width * scale ),
level_height = Math.ceil( this.height * scale ),
//## iiif region
iiif_tile_size_width = Math.ceil( this.tileSize / scale ),
iiif_tile_size_height = Math.ceil( this.tileSize / scale ),
iiif_region,
iiif_tile_x,
iiif_tile_y,
iiif_tile_w,
iiif_tile_h;
if ( level_width < this.tile_width && level_height < this.tile_height ){
iiif_region = 'full';
} else {
iiif_tile_x = x * iiif_tile_size_width;
iiif_tile_y = y * iiif_tile_size_height;
iiif_tile_w = Math.min( iiif_tile_size_width, this.width - iiif_tile_x );
iiif_tile_h = Math.min( iiif_tile_size_height, this.height - iiif_tile_y );
iiif_region = [ iiif_tile_x, iiif_tile_y, iiif_tile_w, iiif_tile_h ].join(',');
}
return [
this['@id'],
iiif_region,
iiif_size,
IIIF_ROTATION,
IIIF_QUALITY
].join('/');
}
});
/**
* @private
* @inner
* @function
*
{
"@context" : "http://library.stanford.edu/iiif/image-api/1.1/context.json",
"@id" : "http://iiif.example.com/prefix/1E34750D-38DB-4825-A38A-B60A345E591C",
"width" : 6000,
"height" : 4000,
"scale_factors" : [ 1, 2, 4 ],
"tile_width" : 1024,
"tile_height" : 1024,
"formats" : [ "jpg", "png" ],
"qualities" : [ "native", "grey" ]
"profile" : "http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level0"
}
*/
function configureFromObject( tileSource, configuration ){
//the image_host property is not part of the iiif standard but is included here to
//allow the info.json and info.xml specify a different server to load the
//images from so we can test the implementation.
if( configuration.image_host ){
configuration.tilesUrl = configuration.image_host;
}
return configuration;
}
}( OpenSeadragon ));