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Add support for IIIF Image API 3.0 beta

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This commit is contained in:
Lutz Helm 2019-12-17 16:22:48 +01:00
parent ae4f586714
commit 8ae1edfd48
1 changed files with 57 additions and 19 deletions
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76
src/iiiftilesource.js
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@ -59,6 +59,8 @@ $.IIIFTileSource = function( options ){
this.tileFormat = this.tileFormat || 'jpg';
this.version = options.version;
// N.B. 2.0 renamed scale_factors to scaleFactors
if ( this.tile_width && this.tile_height ) {
options.tileWidth = this.tile_width;
@ -88,7 +90,7 @@ $.IIIFTileSource = function( options ){
}
}
}
} else if ( canBeTiled(options.profile) ) {
} else if ( canBeTiled(options) ) {
// use the largest of tileOptions that is smaller than the short dimension
var shortDim = Math.min( this.height, this.width ),
tileOptions = [256, 512, 1024],
@ -201,11 +203,42 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
var options = configureFromXml10( data );
options['@context'] = "http://iiif.io/api/image/1.0/context.json";
options['@id'] = url.replace('/info.xml', '');
options.version = 1;
return options;
} else {
if ( !data['@context'] ) {
data['@context'] = 'http://iiif.io/api/image/1.0/context.json';
data['@id'] = url.replace('/info.json', '');
data.version = 1;
} else {
var context = data['@context'];
if (Array.isArray(context)) {
for (var i = 0; i < context.length; i++) {
if (typeof context[i] === 'string' &&
( /^http:\/\/iiif\.io\/api\/image\/[0-2]\/context\.json$/.test(context[i]) ||
context[i] === 'http://library.stanford.edu/iiif/image-api/1.1/context.json' ) ) {
context = context[i];
break;
}
}
}
switch (data['@context']) {
case 'http://iiif.io/api/image/1/context.json':
case 'http://library.stanford.edu/iiif/image-api/1.1/context.json':
data.version = 1;
break;
case 'http://iiif.io/api/image/2/context.json':
data.version = 2;
break;
case 'http://iiif.io/api/image/3/context.json':
data.version = 3;
break;
default:
// unexpected context
}
}
if ( !data['@id'] && data['id'] ) {
data['@id'] = data['id'];
}
if(data.preferredFormats) {
for (var f = 0; f < data.preferredFormats.length; f++ ) {
@ -350,25 +383,22 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
iiifTileH,
iiifSize,
iiifSizeW,
iiifSizeH,
iiifQuality,
uri,
isv1;
uri;
tileWidth = this.getTileWidth(level);
tileHeight = this.getTileHeight(level);
iiifTileSizeWidth = Math.ceil( tileWidth / scale );
iiifTileSizeHeight = Math.ceil( tileHeight / scale );
isv1 = ( this['@context'].indexOf('/1.0/context.json') > -1 ||
this['@context'].indexOf('/1.1/context.json') > -1 ||
this['@context'].indexOf('/1/context.json') > -1 );
if (isv1) {
if (this.version === 1) {
iiifQuality = "native." + this.tileFormat;
} else {
iiifQuality = "default." + this.tileFormat;
}
if ( levelWidth < tileWidth && levelHeight < tileHeight ){
if ( isv1 || levelWidth !== this.width ) {
iiifSize = levelWidth + ",";
if ( this.version === 1 || levelWidth !== this.width ) {
iiifSize = levelWidth + "," + ( this.version === 3 ? levelHeight : "" );
} else {
iiifSize = "max";
}
@ -384,10 +414,11 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
iiifRegion = [ iiifTileX, iiifTileY, iiifTileW, iiifTileH ].join( ',' );
}
iiifSizeW = Math.ceil( iiifTileW * scale );
if ( (!isv1) && iiifSizeW === this.width ) {
iiifSizeH = Math.ceil( iiifTileH * scale );
if ( this.version !== 1 && iiifSizeW === this.width && ( this.version !== 3 || iiifSizeH === this.height ) ) {
iiifSize = "max";
} else {
iiifSize = iiifSizeW + ",";
iiifSize = iiifSizeW + "," + ( this.version === 3 ? iiifSizeH : "" );
}
}
uri = [ this['@id'], iiifRegion, iiifSize, IIIF_ROTATION, iiifQuality ].join( '/' );
@ -403,18 +434,23 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
* @param {array} profile - IIIF profile array
* @throws {Error}
*/
function canBeTiled ( profile ) {
function canBeTiled ( options ) {
var level0Profiles = [
"http://library.stanford.edu/iiif/image-api/compliance.html#level0",
"http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level0",
"http://iiif.io/api/image/2/level0.json"
"http://iiif.io/api/image/2/level0.json",
"level0",
"https://iiif.io/api/image/3/level0.json"
];
var isLevel0 = (level0Profiles.indexOf(profile[0]) !== -1);
var hasSizeByW = false;
if ( profile.length > 1 && profile[1].supports ) {
hasSizeByW = profile[1].supports.indexOf( "sizeByW" ) !== -1;
var isLevel0 = (level0Profiles.indexOf(options.profile[0]) !== -1);
var hasCanoncicalSizeFeature = false;
if ( options.version === 2 && options.profile.length > 1 && options.profile[1].supports ) {
hasCanoncicalSizeFeature = options.profile[1].supports.indexOf( "sizeByW" ) !== -1;
}
return !isLevel0 || hasSizeByW;
if ( options.version === 3 && options.extraFeatures ) {
hasCanoncicalSizeFeature = options.extraFeatures.indexOf( "sizeByWh" ) !== -1;
}
return !isLevel0 || hasCanoncicalSizeFeature;
}
/**
@ -427,7 +463,9 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
var levels = [];
for(var i = 0; i < options.sizes.length; i++) {
levels.push({
url: options['@id'] + '/full/' + options.sizes[i].width + ',/0/default.' + options.tileFormat,
url: options['@id'] + '/full/' + options.sizes[i].width + ',' +
(options.version === 3 ? options.sizes[i].height : '') +
'/0/default.' + options.tileFormat,
width: options.sizes[i].width,
height: options.sizes[i].height
});