javascript - Setting image size percentage in canvas and jquery -


i'm trying create one-pager @ moment canvas can click add/place images @ random. i've gotten of want work, being extremely new jquery , canvas, still can't figure out how set max-size images. far i've understood, can quite hard make images on canvas work when haven't set canvas size manually in css, have resizing canvas, i'm not sure how around that.

i want images place have max-height/max-width of 80% of viewport. tried setting max size in css, didn't anything.

here's jsfiddle

  $(document).ready(function () {    	var images = [];      $("#siteload").fadein(1500);    	$('.put').each(function() {      	images.push($(this).attr('src'));      });      (function() {      var          htmlcanvas = document.getelementbyid('c'),          context = htmlcanvas.getcontext('2d');          initialize();          img = new image();          count = 0;          htmlcanvas.onclick= function(evt) {          img.src = images[count];            var x = evt.offsetx - img.width/2,                y = evt.offsety - img.height/2;            context.drawimage(img, x, y);            count++;            if (count == images.length) {            count = 0;            }          }        function initialize() {          window.addeventlistener('resize', resizecanvas, false);          resizecanvas();        }        function resizecanvas() {          htmlcanvas.width = window.innerwidth;          htmlcanvas.height = window.innerheight;        }      })();    });    $(".hvr_cnt").mouseenter(function () {        title = $("<div class='hvr_ttl'>" + $(this).children()[0].title + "</div>");        $(this).children()[0].title = "";        $(this).append(title);    });    $(document).mousemove(function(e){       $('.hvr_ttl').css({         top: e.pagey - $(".hvr_ttl").height()/2,         left:  e.pagex - $(".hvr_ttl").width()/2       });     });    $(".hvr_cnt").mouseleave(function (e) {       $(this).children()[0].title = $($(this).children()[1]).html();       $(this).children()[1].remove();    });
body {    margin: 0;    padding: 0;    background: rgb(240, 240, 240);    width: 100%;    height: 100%;    border: 0;    color: rgb(40, 40, 40);    overflow: hidden;    display: block;  }    .slides {    display: none  }    #c {    display: block;    position: absolute;    left: 0px;    top: 0px;  }    .hvr_ttl {    display: block;    position: absolute;    pointer-events: none;    cursor: none;  }    .hvr_cnt {    cursor: none;    padding: none;    margin: none;  }
<body ontouchstart="">    <div class="hvr_cnt">      <canvas id="c" title="click"></canvas>    </div>    <ul class="slides">      <li><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/8/85/smiley.svg/2000px-smiley.svg.png" class="put" /></li>      <li><img src="https://emojipedia-us.s3.amazonaws.com/thumbs/160/google/56/thumbs-up-sign_1f44d.png" class="put" /></li>    </ul>  </body>

any appreciated :)

context.drawimage(img, 0, 0,img.width,img.height,0,0,htmlcanvas.width,htmlcanvas.height);

you can use background-size:cover;


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