2d.clearRect.negative.worker.js (929B)
1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. 2 // OffscreenCanvas test in a worker:2d.clearRect.negative 3 // Description:clearRect of negative sizes works 4 // Note: 5 6 importScripts("/resources/testharness.js"); 7 importScripts("/html/canvas/resources/canvas-tests.js"); 8 9 var t = async_test("clearRect of negative sizes works"); 10 var t_pass = t.done.bind(t); 11 var t_fail = t.step_func(function(reason) { 12 throw reason; 13 }); 14 t.step(function() { 15 16 var canvas = new OffscreenCanvas(100, 50); 17 var ctx = canvas.getContext('2d'); 18 19 ctx.fillStyle = '#f00'; 20 ctx.fillRect(0, 0, 100, 50); 21 ctx.clearRect(0, 0, 50, 25); 22 ctx.clearRect(100, 0, -50, 25); 23 ctx.clearRect(0, 50, 50, -25); 24 ctx.clearRect(100, 50, -50, -25); 25 _assertPixel(canvas, 25,12, 0,0,0,0); 26 _assertPixel(canvas, 75,12, 0,0,0,0); 27 _assertPixel(canvas, 25,37, 0,0,0,0); 28 _assertPixel(canvas, 75,37, 0,0,0,0); 29 t.done(); 30 }); 31 done();