I am trying to load .tif files onto an HTML5 canvas. After some research, I discovered that I might be able to do it using FileReader. Most of my code below is from http://www.nczonline.net/blog/2012/05/15/working-with-files-in-javascript-part-2/ . Unfortunately, the following test page fails on .tif files (it works on other image files) saying 'Image could not load' in Firefox and Chrome (let's ignore IE for this test). Am I missing something?
function loadFile(e) {
var file = e.target.files[0];
var reader = new FileReader();
reader.onload = function(event) {
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
var dataUri = event.target.result,
img = new Image();
// wait until the image has been fully processed
img.onload = function() {
context.drawImage(img, 0, 0);
};
img.onerror = function () {
console.error('Image could not load.');
}
img.src = dataUri;
};
reader.onerror = function(event) {
console.error("File could not be read. Code " + event.target.error.code);
};
reader.readAsDataURL(file);
}