Not how to do this process and consulted but did not reach, if I can help.
probe what went something like this:
var reader = new FileReader();
reader.onload = function(event) {
var dataUri = event.target.result,
context = document.getElementById("mycanvas").getContext("2d"),
img = new Image();
// wait until the image has been fully processed
img.onload = function() {
context.drawImage(img, 100, 100);
};
img.src = 'url_imagen';
};
reader.onerror = function(event) {
console.error("File could not be read! Code " + event.target.error.code);
};
reader.readAsDataURL(file);
With all the contributions realize but try and if it works.
Point run to desert, poker images having resolution jpg my delivers the following error:
TIFFReadDirectory: Warning, Unknown field with tag 347 (0x15b) encountered. tiff_min.js (línea 103) 1.tiff: JPEG compression support is not configured. tiff_min.js (línea 103) 1.tiff: Sorry, requested compression method is not configured. tiff_min.js (línea 103) uncaught exception: [object Object]
The probe code that is this:
Tiff.initialize({TOTAL_MEMORY: 19777216 * 10});
var xhr = new XMLHttpRequest();
xhr.responseType = 'arraybuffer';
xhr.open('GET', url);
xhr.onload = function (e) {
var tiff = new Tiff({buffer: xhr.response,height:450});
var canvas = tiff.toCanvas();
//canvas.width = 700;
//canvas.height = 450;
div.html(canvas);
msn('Imagen cargada', "Imagen cargada con exito.");
};
xhr.send();
As answered here and here, it all comes down to browser support.
You can however get the image as binary data and display it using a library:
https://github.com/seikichi/tiff.js
https://code.google.com/p/tiffus/
https://github.com/GPHemsley/tiff-js
Displaying Tiff File in angular by displaying the image in the canvas.
Download the 'tiff.min.js' from https://github.com/seikichi/tiff.js and add the file to the 'src' folder.
Update the angular.json file with "scripts": [ "src/tiff.min.js"]
under "project"-> "architect" -> "build"->"options"->"scripts"
Inside the ts file of the component add the following code:
declare var Tiff: any; # declared globally outside the class
# inside the component class
let xhr = new XMLHttpRequest();
xhr.responseType = 'arraybuffer';
xhr.open('GET', 'src_of_image_to_be_displayed');
xhr.onload = (e) => {
let tiff = new Tiff({buffer: xhr.response});
let canvas = tiff.toCanvas();
document.body.append(canvas); # append to an div element
}
xhr.send();
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