2d.imageData.put.modified.worker.js (1006B)
1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. 2 // OffscreenCanvas test in a worker:2d.imageData.put.modified 3 // Description:putImageData() puts modified image data correctly 4 // Note: 5 6 importScripts("/resources/testharness.js"); 7 importScripts("/html/canvas/resources/canvas-tests.js"); 8 9 var t = async_test("putImageData() puts modified image data correctly"); 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 = '#0f0'; 20 ctx.fillRect(0, 0, 100, 50) 21 ctx.fillStyle = '#f00'; 22 ctx.fillRect(45, 20, 10, 10) 23 var imgdata = ctx.getImageData(45, 20, 10, 10); 24 for (var i = 0, len = imgdata.width*imgdata.height*4; i < len; i += 4) 25 { 26 imgdata.data[i] = 0; 27 imgdata.data[i+1] = 255; 28 } 29 ctx.putImageData(imgdata, 45, 20); 30 _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2); 31 t.done(); 32 }); 33 done();