2d.imageData.get.source.negative.worker.js (1942B)
1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. 2 // OffscreenCanvas test in a worker:2d.imageData.get.source.negative 3 // Description:getImageData() works with negative width and height, and returns top-to-bottom left-to-right 4 // Note: 5 6 importScripts("/resources/testharness.js"); 7 importScripts("/html/canvas/resources/canvas-tests.js"); 8 9 var t = async_test("getImageData() works with negative width and height, and returns top-to-bottom left-to-right"); 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 = '#000'; 20 ctx.fillRect(0, 0, 100, 50); 21 ctx.fillStyle = '#fff'; 22 ctx.fillRect(20, 10, 60, 10); 23 24 var imgdata1 = ctx.getImageData(85, 25, -10, -10); 25 _assertSame(imgdata1.data[0], 255, "imgdata1.data[\""+(0)+"\"]", "255"); 26 _assertSame(imgdata1.data[1], 255, "imgdata1.data[\""+(1)+"\"]", "255"); 27 _assertSame(imgdata1.data[2], 255, "imgdata1.data[\""+(2)+"\"]", "255"); 28 _assertSame(imgdata1.data[3], 255, "imgdata1.data[\""+(3)+"\"]", "255"); 29 _assertSame(imgdata1.data[imgdata1.data.length-4+0], 0, "imgdata1.data[imgdata1.data.length-4+0]", "0"); 30 _assertSame(imgdata1.data[imgdata1.data.length-4+1], 0, "imgdata1.data[imgdata1.data.length-4+1]", "0"); 31 _assertSame(imgdata1.data[imgdata1.data.length-4+2], 0, "imgdata1.data[imgdata1.data.length-4+2]", "0"); 32 _assertSame(imgdata1.data[imgdata1.data.length-4+3], 255, "imgdata1.data[imgdata1.data.length-4+3]", "255"); 33 34 var imgdata2 = ctx.getImageData(0, 0, -1, -1); 35 _assertSame(imgdata2.data[0], 0, "imgdata2.data[\""+(0)+"\"]", "0"); 36 _assertSame(imgdata2.data[1], 0, "imgdata2.data[\""+(1)+"\"]", "0"); 37 _assertSame(imgdata2.data[2], 0, "imgdata2.data[\""+(2)+"\"]", "0"); 38 _assertSame(imgdata2.data[3], 0, "imgdata2.data[\""+(3)+"\"]", "0"); 39 t.done(); 40 }); 41 done();