testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.3.html

   1 <!DOCTYPE html>
   2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
   3 <title>OffscreenCanvas test: 2d.path.arc.shape.3</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.path.arc.shape.3</h1>
   9 <p class="desc">arc() from 0 to -pi/2 does not draw anything in the wrong quadrant</p>
  10
  11
  12 <script>
  13 var t = async_test("arc() from 0 to -pi/2 does not draw anything in the wrong quadrant");
  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 = '#0f0';
  24 ctx.fillRect(0, 0, 100, 50);
  25 ctx.lineWidth = 100;
  26 ctx.strokeStyle = '#f00';
  27 ctx.beginPath();
  28 ctx.arc(0, 50, 50, 0, -Math.PI/2, false);
  29 ctx.stroke();
  30 _assertPixel(canvas, 50,25, 0,255,0,255);
  31 _assertPixel(canvas, 1,1, 0,255,0,255);
  32 _assertPixel(canvas, 98,1, 0,255,0,255);
  33 _assertPixel(canvas, 1,48, 0,255,0,255);
  34 _assertPixel(canvas, 98,48, 0,255,0,255);
  35 t.done();
  36
  37 });
  38 </script>