<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>OffscreenCanvas test: 2d.transformation.rotate.wrap</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>

<h1>2d.transformation.rotate.wrap</h1>
<p class="desc">rotate() wraps large positive values correctly</p>


<script>
var t = async_test("rotate() wraps large positive values correctly");
var t_pass = t.done.bind(t);
var t_fail = t.step_func(function(reason) {
    throw reason;
});
t.step(function() {

  var canvas = new OffscreenCanvas(100, 50);
  var ctx = canvas.getContext('2d');

  ctx.fillStyle = '#f00';
  ctx.fillRect(0, 0, 100, 50);

  ctx.rotate(Math.PI * (1 + 4096)); // == pi (mod 2*pi)
  // We need about pi +/- 0.001 in order to get correct-looking results
  // 32-bit floats can store pi*4097 with precision 2^-10, so that should
  // be safe enough on reasonable implementations
  ctx.fillStyle = '#0f0';
  ctx.fillRect(-100, -50, 100, 50);
  _assertPixel(canvas, 50,25, 0,255,0,255);
  _assertPixel(canvas, 98,2, 0,255,0,255);
  _assertPixel(canvas, 98,47, 0,255,0,255);
  t.done();

});
</script>
