<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>Canvas test: 2d.transformation.transform.skewed</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
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<body class="show_output">

<h1>2d.transformation.transform.skewed</h1>
<p class="desc">transform() with skewy matrix transforms correctly</p>


<p class="output">Actual output:</p>
<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
<p class="output expectedtext">Expected output:<p><img src="/images/green-100x50.png" class="output expected" id="expected" alt="">
<ul id="d"></ul>
<script>
var t = async_test("transform() with skewy matrix transforms correctly");
_addTest(function(canvas, ctx) {

  // Create green with a red square ring inside it
  ctx.fillStyle = '#0f0';
  ctx.fillRect(0, 0, 100, 50);
  ctx.fillStyle = '#f00';
  ctx.fillRect(20, 10, 60, 30);
  ctx.fillStyle = '#0f0';
  ctx.fillRect(40, 20, 20, 10);

  // Draw a skewed shape to fill that gap, to make sure it is aligned correctly
  ctx.transform(1,4, 2,3, 5,6);
  // Post-transform coordinates:
  //   [[20,10],[80,10],[80,40],[20,40],[20,10],[40,20],[40,30],[60,30],[60,20],[40,20],[20,10]];
  // Hence pre-transform coordinates:
  var pts=[[-7.4,11.2],[-43.4,59.2],[-31.4,53.2],[4.6,5.2],[-7.4,11.2],
           [-15.4,25.2],[-11.4,23.2],[-23.4,39.2],[-27.4,41.2],[-15.4,25.2],
           [-7.4,11.2]];
  ctx.beginPath();
  ctx.moveTo(pts[0][0], pts[0][1]);
  for (var i = 0; i < pts.length; ++i)
      ctx.lineTo(pts[i][0], pts[i][1]);
  ctx.fill();
  _assertPixel(canvas, 21,11, 0,255,0,255);
  _assertPixel(canvas, 79,11, 0,255,0,255);
  _assertPixel(canvas, 21,39, 0,255,0,255);
  _assertPixel(canvas, 79,39, 0,255,0,255);
  _assertPixel(canvas, 39,19, 0,255,0,255);
  _assertPixel(canvas, 61,19, 0,255,0,255);
  _assertPixel(canvas, 39,31, 0,255,0,255);
  _assertPixel(canvas, 61,31, 0,255,0,255);

});
</script>

