/*
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IIPImage Javascript Viewer <http://iipimage.sourceforge.net>
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Version 2.0
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Protocol classes for handling IIP, Zoomify, Deepzoom and Djatoka protocols
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Copyright (c) 2007-2011 Ruven Pillay <ruven@users.sourceforge.net>
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---------------------------------------------------------------------------
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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---------------------------------------------------------------------------
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*/
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/* IIP Protocol Handler
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*/
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var IIP = new Class({
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/* Return metadata URL
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*/
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getMetaDataURL: function(image){
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return "FIF=" + image + "&obj=IIP,1.0&obj=Max-size&obj=Tile-size&obj=Resolution-number";
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},
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/* Return an individual tile request URL
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*/
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getTileURL: function(server,image,resolution,sds,contrast,k,x,y){
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return server+"?FIF="+image+"&CNT="+contrast+"&SDS="+sds+"&JTL="+resolution+"," + k;
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},
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/* Parse an IIP protocol metadata request
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*/
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parseMetaData: function(response){
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var tmp = response.split( "Max-size" );
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if(!tmp[1]) alert( "Error: Unexpected response from server " + this.server );
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var size = tmp[1].split(" ");
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var max_size = { w: parseInt(size[0].substring(1,size[0].length)),
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h: parseInt(size[1]) };
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tmp = response.split( "Tile-size" );
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size = tmp[1].split(" ");
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var tileSize = { w: parseInt(size[0].substring(1,size[0].length)),
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h: parseInt(size[1]) };
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tmp = response.split( "Resolution-number" );
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num_resolutions = parseInt( tmp[1].substring(1,tmp[1].length) );
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var result = {
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'max_size': max_size,
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'tileSize': tileSize,
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'num_resolutions': num_resolutions
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};
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return result;
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},
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/* Return URL for a full view
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*/
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getRegionURL: function(image,x,y,w,h){
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var rgn = x + ',' + y + ',' + w + ',' + h;
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return '?FIF='+image+'&WID='+w+'&RGN='+rgn+'&CVT=jpeg';
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}
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});
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/* Zoomify Protocol Handler
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*/
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var Zoomify = new Class({
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/* Return metadata URL
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*/
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getMetaDataURL: function(image){
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return "Zoomify=" + image + "/ImageProperties.xml";
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},
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/* Return an individual tile request URL
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*/
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getTileURL: function(server,image,resolution,sds,contrast,k,x,y){
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return server+"?Zoomify="+image+"/TileGroup0/"+resolution+"-"+x+"-"+y+".jpg";
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},
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/* Parse a Zoomify protocol metadata request
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*/
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parseMetaData: function(response){
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// Simply split the reponse as a string
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var tmp = response.split('"');
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var w = parseInt(tmp[1]);
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var h = parseInt(tmp[3]);
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var ts = parseInt(tmp[11]);
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// Calculate the number of resolutions - smallest fits into a tile
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var max = (w>h)? w : h;
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var n = 1;
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while( max > ts ){
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max = Math.floor( max/2 );
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n++;
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}
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var result = {
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'max_size': { w: w, h: h },
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'tileSize': { w: ts, h: ts },
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'num_resolutions': n
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};
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return result;
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},
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/* Return URL for a full view - not possible with Zoomify
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*/
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getRegionURL: function(image,x,y,w,h){
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return null;
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}
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});
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/* Djatoka Protocol Handler
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*/
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var Djatoka = new Class({
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'svc_val_fmt': "info:ofi/fmt:kev:mtx:jpeg2000",
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'svc_id': "info:lanl-repo/svc/getRegion",
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/* Return metadata URL
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*/
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getMetaDataURL: function(image){
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return "url_ver=Z39.88-2004&rft_id=" + image + "&svc_id=info:lanl-repo/svc/getMetadata";
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},
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/* Return an individual tile request URL
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*/
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getTileURL: function(server,image,resolution,sds,contrast,k,x,y){
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var src = server + "?url_ver=Z39.88-2004&rft_id="
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+ image + "&svc_id=" + this.svc_id
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+ "&svc_val_fmt=" + this.svc_val_fmt
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+ "&svc.format=image/jpeg&svc.level="
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+ resolution + "&svc.rotate=0&svc.region="
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+ djatoka_y + "," + djatoka_x + ",256,256";
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return src;
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},
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/* Parse a Djatoka protocol metadata request
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*/
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parseMetaData: function(response){
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var p = eval("(" + response + ")");
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var tmp = p.levels;
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var w = parseInt(p.width);
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var h = parseInt(p.height);
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var num_resolutions = parseInt(p.levels);
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var result = {
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'max_size': { w: w, h: h },
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'tileSize': { w: 256, h: 256 },
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'num_resolutions': num_resolutions
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};
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return result;
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},
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/* Return URL for a full view
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*/
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getRegionURL: function(image,x,y,w,h){
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return null;
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}
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});
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/* DeepZoom Protocol Handler
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*/
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var DeepZoom = new Class({
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/* Return metadata URL
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*/
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getMetaDataURL: function(image){
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return "Deepzoom=" + image + ".dzi";
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},
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/* Return an individual tile request URL
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*/
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getTileURL: function(server,image,resolution,sds,contrast,k,x,y){
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return server+'?DeepZoom='+image+'_files/'+(resolution+1)+'/'+x+'_'+y+'.jpg';
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},
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/* Parse a Deepzoom protocol metadata request
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*/
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parseMetaData: function(response){
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var ts = parseInt( /TileSize="(\d+)/.exec(response)[1] );
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var w = parseInt( /Width="(\d+)/.exec(response)[1] );
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var h = parseInt( /Height="(\d+)/.exec(response)[1] );
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// Number of resolutions is the ceiling of Log2(max)
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var max = (w>h)? w : h;
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var result = {
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'max_size': { w: w, h: h },
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'tileSize': { w: ts, h: ts },
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'num_resolutions': Math.ceil( Math.log(max)/Math.LN2 )
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};
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return result;
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},
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/* Return URL for a full view - not possible with Deepzoom
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*/
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getRegionURL: function(image,x,y,w,h){
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return null;
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}
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});
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