| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> |
| <title>OffscreenCanvas test: 2d.text.measure.emHeights-zero-descent</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/html/canvas/resources/canvas-tests.js"></script> |
| |
| <h1>2d.text.measure.emHeights-zero-descent</h1> |
| <p class="desc">Testing emHeights with zero descent metric</p> |
| |
| |
| <script> |
| promise_test(async t => { |
| |
| var canvas = new OffscreenCanvas(100, 50); |
| var ctx = canvas.getContext('2d'); |
| |
| var f = new FontFace("CanvasTest-descent0", "url('/fonts/CanvasTest-descent0.ttf')"); |
| f.load(); |
| document.fonts.add(f); |
| await document.fonts.ready; |
| ctx.font = '40px CanvasTest-descent0'; |
| ctx.direction = 'ltr'; |
| ctx.align = 'left' |
| _assertSame(ctx.measureText('A').emHeightAscent, 40, "ctx.measureText('A').emHeightAscent", "40"); |
| _assertSame(ctx.measureText('A').emHeightDescent, 0, "ctx.measureText('A').emHeightDescent", "0"); |
| _assertSame(ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent, 40, "ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent", "40"); |
| |
| _assertSame(ctx.measureText('ABCD').emHeightAscent, 40, "ctx.measureText('ABCD').emHeightAscent", "40"); |
| _assertSame(ctx.measureText('ABCD').emHeightDescent, 0, "ctx.measureText('ABCD').emHeightDescent", "0"); |
| _assertSame(ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent, 40, "ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent", "40"); |
| |
| }, "Testing emHeights with zero descent metric"); |
| </script> |