2d.imageData.get.rounding.html (1419B)
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.rounding</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.rounding</h1> 10 <p class="desc">Test the handling of non-integer source coordinates in getImageData().</p> 11 12 13 <script> 14 var t = async_test("Test the handling of non-integer source coordinates in getImageData()."); 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 function testDimensions(sx, sy, sw, sh, width, height) 25 { 26 imageData = ctx.getImageData(sx, sy, sw, sh); 27 _assert(imageData.width == width, "imageData.width == width"); 28 _assert(imageData.height == height, "imageData.height == height"); 29 } 30 31 testDimensions(0, 0, 20, 10, 20, 10); 32 33 testDimensions(.1, .2, 20, 10, 20, 10); 34 testDimensions(.9, .8, 20, 10, 20, 10); 35 36 testDimensions(0, 0, 20.9, 10.9, 20, 10); 37 testDimensions(0, 0, 20.1, 10.1, 20, 10); 38 39 testDimensions(-1, -1, 20, 10, 20, 10); 40 41 testDimensions(-1.1, 0, 20, 10, 20, 10); 42 testDimensions(-1.9, 0, 20, 10, 20, 10); 43 t.done(); 44 45 }); 46 </script>