2d.text.measure.emHeights-zero-descent.html (1692B)
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.text.measure.emHeights-zero-descent</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.text.measure.emHeights-zero-descent</h1> 10 <p class="desc">Testing emHeights with zero descent metric</p> 11 12 13 <script> 14 promise_test(async t => { 15 16 var canvas = new OffscreenCanvas(100, 50); 17 var ctx = canvas.getContext('2d'); 18 19 var f = new FontFace("CanvasTest-descent0", "url('/fonts/CanvasTest-descent0.ttf')"); 20 f.load(); 21 document.fonts.add(f); 22 await document.fonts.ready; 23 ctx.font = '40px CanvasTest-descent0'; 24 ctx.direction = 'ltr'; 25 ctx.align = 'left' 26 _assertSame(ctx.measureText('A').emHeightAscent, 40, "ctx.measureText('A').emHeightAscent", "40"); 27 _assertSame(ctx.measureText('A').emHeightDescent, 0, "ctx.measureText('A').emHeightDescent", "0"); 28 _assertSame(ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent, 40, "ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent", "40"); 29 30 _assertSame(ctx.measureText('ABCD').emHeightAscent, 40, "ctx.measureText('ABCD').emHeightAscent", "40"); 31 _assertSame(ctx.measureText('ABCD').emHeightDescent, 0, "ctx.measureText('ABCD').emHeightDescent", "0"); 32 _assertSame(ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent, 40, "ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent", "40"); 33 34 }, "Testing emHeights with zero descent metric"); 35 </script>