2d.clearRect.negative.worker.js

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.negative.worker.html - WPT Dashboard Interop Dashboard

// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.

// OffscreenCanvas test in a worker:2d.clearRect.negative

// Description:clearRect of negative sizes works

// Note:

importScripts("/resources/testharness.js");

importScripts("/html/canvas/resources/canvas-tests.js");

var t = async_test("clearRect of negative sizes works");

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.clearRect(0, 0, 50, 25);

  ctx.clearRect(100, 0, -50, 25);

  ctx.clearRect(0, 50, 50, -25);

  ctx.clearRect(100, 50, -50, -25);

  _assertPixel(canvas, 25,12, 0,0,0,0);

  _assertPixel(canvas, 75,12, 0,0,0,0);

  _assertPixel(canvas, 25,37, 0,0,0,0);

  _assertPixel(canvas, 75,37, 0,0,0,0);

  t.done();

});

done();