title: Change color rgba Javascript
body: <p>Here is my JS code :   </p>
  
  <pre><code> UTIF._imgLoaded = function(e)
              {
                  var page = UTIF.decode(e.target.response)[0], rgba = UTIF.toRGBA8(page), w=page.width, h=page.height;
  
  
                  var string = rgba.join();
                  console.log("rgba : ", rgba);
  
                  var ind = UTIF._xhrs.indexOf(e.target), img = UTIF._imgs[ind];
                  UTIF._xhrs.splice(ind,1);  UTIF._imgs.splice(ind,1);
                  var cnv = document.createElement("canvas");  cnv.width=w;  cnv.height=h;
                  var ctx = cnv.getContext("2d"), imgd = ctx.createImageData(w,h);
                  for(var i=0; i&lt;rgba.length; i++) imgd.data[i]=rgba[i];       ctx.putImageData(imgd,0,0);
                  var attr = ["style","class","id"];
                  for(var i=0; i&lt;attr.length; i++) cnv.setAttribute(attr[i], img.getAttribute(attr[i]));
                  img.parentNode.replaceChild(cnv,img);
  
                  document.getElementById("myText").innerHTML = string;
              }
  </code></pre>
  
  <p>I get a Uint8Array() RGBA of image, here is console.log of this :
  <a href="https://i.stack.imgur.com/6PKFA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6PKFA.png" alt="enter image description here"></a></p>
  
  <p>Here is image with rgba array as a string in HTML:</p>
  
  <p><a href="https://i.stack.imgur.com/MHODO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MHODO.png" alt="enter image description here"></a></p>
  
  <p>Is that possible to manipulate this array, to ex. change colors? Thanks for help!</p>