already have the buffer

src/jp4-canvas/jquery-jp4.js

@@ -232,22 +232,15 @@
         IMAGE_FORMAT = "TIFF";
         obj.format = IMAGE_FORMAT;
 
-        var arrayBuffer;
-        var fileReader = new FileReader();
-        fileReader.onload = function(event){
-
-            arrayBuffer = event.target.result;
-
         // tiff.js which is limited in capabilities
         //var tiff = new Tiff({buffer: arrayBuffer});
         //var canvas = tiff.toCanvas();
 
         // UTIF.js
-            var ifds = UTIF.decode(arrayBuffer);
-            UTIF.decodeImage(arrayBuffer, ifds[0]);
+        var ifds = UTIF.decode(imagedata);
+        UTIF.decodeImage(imagedata, ifds[0]);
 
         if (ifds[0].t258==16){
-
             rgba_16bit = new Float32Array(ifds[0].data.filter((x,i) => i%2==0));
             rgba_16bit = rgba_16bit.map((x,i) => x + (ifds[0].data[2*i+1]<<8));
 
@@ -359,11 +352,6 @@
 
         //Elphel.Canvas.drawScaled($(canvas),cnv_display,settings.width);
         Elphel.Canvas.drawScaled(cnv_working,cnv_display,settings.width);
-
-            delete this;
-        }
-        fileReader.readAsArrayBuffer(new Blob([imagedata]));
-
     }
 
     function process_image(imagedata){