testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destsize.html

   1 <!DOCTYPE html>
   2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
   3 <title>OffscreenCanvas test: 2d.drawImage.9arg.destsize</title>
   4 <meta name="timeout" content="long">
   5 <script src="/resources/testharness.js"></script>
   6 <script src="/resources/testharnessreport.js"></script>
   7 <script src="/html/canvas/resources/canvas-tests.js"></script>
   8
   9 <h1>2d.drawImage.9arg.destsize</h1>
  10 <p class="desc"></p>
  11
  12
  13 <script>
  14 var t = async_test("");
  15 var t_pass = t.done.bind(t);
  16 var t_fail = t.step_func(function(reason) {
  17     throw reason;
  18 });
  19 t.step(function() {
  20
  21 var canvas = new OffscreenCanvas(100, 50);
  22 var ctx = canvas.getContext('2d');
  23
  24 ctx.fillStyle = '#f00';
  25 ctx.fillRect(0, 0, 100, 50);
  26 var promise1 = new Promise(function(resolve, reject) {
  27     var xhr = new XMLHttpRequest();
  28     xhr.open("GET", '/images/red.png');
  29     xhr.responseType = 'blob';
  30     xhr.send();
  31     xhr.onload = function() {
  32         resolve(xhr.response);
  33     };
  34 });
  35 var promise2 = new Promise(function(resolve, reject) {
  36     var xhr = new XMLHttpRequest();
  37     xhr.open("GET", '/images/green.png');
  38     xhr.responseType = 'blob';
  39     xhr.send();
  40     xhr.onload = function() {
  41         resolve(xhr.response);
  42     };
  43 });
  44 Promise.all([promise1, promise2]).then(function(response1, response2) {
  45     var promise3 = createImageBitmap(response1);
  46     var promise4 = createImageBitmap(response2);
  47     Promise.all([promise3, promise4]).then(function(bitmap1, bitmap2) {
  48         ctx.drawImage(bitmap2, 1, 1, 1, 1, 0, 0, 100, 50);
  49         ctx.drawImage(bitmap1, 0, 0, 100, 50, -50, 0, 50, 50);
  50         ctx.drawImage(bitmap1, 0, 0, 100, 50, 100, 0, 50, 50);
  51         ctx.drawImage(bitmap1, 0, 0, 100, 50, 0, -25, 100, 25);
  52         ctx.drawImage(bitmap1, 0, 0, 100, 50, 0, 50, 100, 25);
  53         _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
  54         _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
  55         _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
  56         _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
  57     }, t_fail);
  58 }).then(t_pass, t_fail);
  59
  60 });
  61 </script>