comparison cpack/dml/web/js/smartimg.js @ 0:718306e29690 tip

commiting public release

+/* Part of DML (Digital Music Laboratory)
+	Copyright 2014-2015 Samer Abdallah, University College London
+	Distributed under GPL v3
+*/
+function load_img(id,url)
+{
+   var xhr = new XMLHttpRequest();
+   xhr.open('GET',url,true);
+   xhr.responseType = 'arraybuffer';
+   xhr.onload = function(e) {
+      var type = xhr.getResponseHeader('Content-Type')
+      console.log(type)
+
+      var arr = new Uint8Array(this.response);
+      var raw = '';
+      var i,j,subArray,chunk = 5000;
+      for (i=0,j=arr.length; i<j; i+=chunk) {
+         subArray = arr.subarray(i,i+chunk);
+         raw += String.fromCharCode.apply(null, subArray);
+      }
+      var dataURL="data:"+type+";base64,"+btoa(raw);
+      document.getElementById(id).src = dataURL;
+   };
+   xhr.send();
+}
+
+function load_img2(id,url)
+{
+   var xhr = new XMLHttpRequest();
+   xhr.responseType = 'arraybuffer';
+   xhr.onload = function() {
+      var type = xhr.getResponseHeader('Content-Type')
+      var el = document.getElementById(id);
+      if (type.substring(0,6)=="image/") {
+         var blb = new Blob([xhr.response], {type: type});
+         var url = (window.URL || window.webkitURL).createObjectURL(blb);
+         el.src = url;
+      } else { 
+         var styles = window.getComputedStyle(el);
+         var fr = document.createElement('iframe');
+         var st = fr.style;
+         st.width=styles.getPropertyValue('width');
+         st.height=styles.getPropertyValue('height');
+         st.display='inline';
+         st['vertical-align']='middle';
+         st['background-color']='#ffe0e0';
+
+         el.parentNode.replaceChild(fr, el);
+         var arr = new Uint8Array(this.response);
+         var raw = String.fromCharCode.apply(null, arr);
+         var doc = fr.contentWindow.document;
+         doc.open();
+         doc.write(raw);
+         doc.close();
+         doc.body.style['font-size']='80%'
+      }
+   }
+   xhr.open('GET',url);
+   xhr.send();
+}
+