javascript - Weird stuttering when generating animated gifs using gifshot.js on ios -


ok, little bit of background... i'm trying generate animated gifs animations done on html5 canvas using javascript. specifically, i'm adding data layers mapbox gl js map , looping through them.

on each iteration, save canvas element , transform blob before calling url.createobjecturl(blob) , setting source new image. after loop finished generate gif using gifshot (https://github.com/yahoo/gifshot) , images created.

this process works in browsers (mobile too!) except on iphone ios. on ios gif has weird stutters , transparency issues. have tried other gif creation libraies have same issue on ios. memory problem or something? i'm @ wit's end on this, appreciated!

this code inside each loop:

var cv = map.getcanvas() var oneimage = new image();  cv.toblob(function(blob) {       url = url.createobjecturl(blob);     oneimage.src = url      images_arr.push(oneimage)     i++;     settimeout(function(){         gifloop(images_arr);       },1000)  })

and code call when loop finished:

var w = window.innerwidth; var h = window.innerheight; recalculated_size = calculateaspectratiofit(w, h, maxwidth, maxheight) w = recalculated_size.width h = recalculated_size.height  gifshot.creategif({     'images': images_arr,     'gifwidth': w,     'gifheight':h, },function(obj) {     if(!obj.error) {         var image = datauritoblob(obj.image)         image = url.createobjecturl(image);          var animatedimage = document.getelementbyid('gif');         animatedimage.src = image          var link = $('#gif-link');         link.attr('href',image);         filename = curr_layer_id + '_' + curr_time +'.gif'         link.attr('download', filename);        }  });

here example of issue i'm referring to


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