testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.scale.html

   1 <!DOCTYPE html>
   2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
   3 <title>OffscreenCanvas test: 2d.shadow.image.scale</title>
   4 <script src="/resources/testharness.js"></script>
   5 <script src="/resources/testharnessreport.js"></script>
   6 <script src="/html/canvas/resources/canvas-tests.js"></script>
   7
   8 <h1>2d.shadow.image.scale</h1>
   9 <p class="desc">Shadows are drawn correctly for scaled images</p>
  10
  11
  12 <script>
  13 var t = async_test("Shadows are drawn correctly for scaled images");
  14 var t_pass = t.done.bind(t);
  15 var t_fail = t.step_func(function(reason) {
  16     throw reason;
  17 });
  18 t.step(function() {
  19
  20 var canvas = new OffscreenCanvas(100, 50);
  21 var ctx = canvas.getContext('2d');
  22
  23 ctx.fillStyle = '#f00';
  24 ctx.fillRect(0, 0, 100, 50);
  25 ctx.shadowOffsetY = 50;
  26 ctx.shadowColor = '#0f0';
  27 var promise = new Promise(function(resolve, reject) {
  28     var xhr = new XMLHttpRequest();
  29     xhr.open("GET", '/images/redtransparent.png');
  30     xhr.responseType = 'blob';
  31     xhr.send();
  32     xhr.onload = function() {
  33         resolve(xhr.response);
  34     };
  35 });
  36 promise.then(function(response) {
  37     createImageBitmap(response).then(bitmap => {
  38         ctx.drawImage(bitmap, 0, 0, 100, 50, -10, -50, 240, 50);
  39         _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
  40         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
  41         _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
  42     }, t_fail);
  43 }).then(t_pass, t_fail);
  44
  45 });
  46 </script>