<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="offscreencanvas.filter.js"></script>
<script>
var patternCanvas = createPatternCanvas();

var getOffscreenContextForFilter = function(filter, pattern) {
  var oc = new OffscreenCanvas(80, 80);
  var offCtx = oc.getContext('2d');
  offCtx.filter = filter;
  offCtx.drawImage(pattern, 5, 5);
  offCtx.drawImage(pattern, 25, 25);
  offCtx.drawImage(pattern, 45, 45);
  return offCtx;
};

var testFilter = function(filter) {
  var offCtx = getOffscreenContextForFilter(filter, patternCanvas);
  var ctx = getRegularContextForFilter(filter, patternCanvas);
  var offImageData = offCtx.getImageData(0, 0, 80, 80).data;
  var imageData = ctx.getImageData(0, 0, 80, 80).data;
  matchImageDataResults(offImageData, imageData, filter);
};

generate_tests(testFilter, [filters]);

</script>