2d.imageData.get.unaffected.html (1272B)
1 <!DOCTYPE html> 2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> 3 <meta charset="UTF-8"> 4 <title>OffscreenCanvas test: 2d.imageData.get.unaffected</title> 5 <script src="/resources/testharness.js"></script> 6 <script src="/resources/testharnessreport.js"></script> 7 <script src="/html/canvas/resources/canvas-tests.js"></script> 8 9 <h1>2d.imageData.get.unaffected</h1> 10 <p class="desc">getImageData() is not affected by context state</p> 11 12 13 <script> 14 var t = async_test("getImageData() is not affected by context state"); 15 var t_pass = t.done.bind(t); 16 var t_fail = t.step_func(function(reason) { 17 throw reason; 18 }); 19 t.step(function() { 20 21 var canvas = new OffscreenCanvas(100, 50); 22 var ctx = canvas.getContext('2d'); 23 24 ctx.fillStyle = '#0f0'; 25 ctx.fillRect(0, 0, 50, 50) 26 ctx.fillStyle = '#f00'; 27 ctx.fillRect(50, 0, 50, 50) 28 ctx.save(); 29 ctx.translate(50, 0); 30 ctx.globalAlpha = 0.1; 31 ctx.globalCompositeOperation = 'destination-atop'; 32 ctx.shadowColor = '#f00'; 33 ctx.rect(0, 0, 5, 5); 34 ctx.clip(); 35 var imgdata = ctx.getImageData(0, 0, 50, 50); 36 ctx.restore(); 37 ctx.putImageData(imgdata, 50, 0); 38 _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2); 39 _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2); 40 t.done(); 41 42 }); 43 </script>