| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> |
| <meta charset="UTF-8"> |
| <title>OffscreenCanvas test: 2d.text.measure.strokeTextCluster-range.tentative</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.strokeTextCluster-range.tentative</h1> |
| <p class="desc">Test that getTextClusters() and strokeTextCluster() correctly render different ranges of the input text.</p> |
| |
| |
| <script> |
| promise_test(async t => { |
| |
| var canvas = new OffscreenCanvas(400, 300); |
| var ctx = canvas.getContext('2d'); |
| |
| // Renders all the clusters in the list from position (x, y). |
| function renderClusters(clusters, x, y) { |
| for (const cluster of clusters) { |
| ctx.strokeTextCluster(cluster, x, y); |
| } |
| } |
| |
| var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')"); |
| f.load(); |
| document.fonts.add(f); |
| await document.fonts.ready; |
| |
| ctx.font = '50px CanvasTest'; |
| ctx.textAlign = 'left'; |
| ctx.textBaseline = 'top'; |
| const text = 'EEEEE'; |
| let tm = ctx.measureText(text); |
| |
| // Background color. |
| ctx.fillStyle = '#f00'; |
| ctx.fillRect(0, 0, canvas.width, canvas.height); |
| |
| ctx.strokeStyle = '#0f0'; |
| ctx.lineWidth = 12; |
| |
| // Without the first character. |
| renderClusters(tm.getTextClusters(1, 5), 0, 0); |
| _assertPixelApprox(canvas, 5,5, 255,0,0,255, 2); |
| _assertPixelApprox(canvas, 55,5, 0,255,0,255, 2); |
| _assertPixelApprox(canvas, 105,5, 0,255,0,255, 2); |
| _assertPixelApprox(canvas, 155,5, 0,255,0,255, 2); |
| _assertPixelApprox(canvas, 205,5, 0,255,0,255, 2); |
| // Without the last character. |
| renderClusters(tm.getTextClusters(0, 4), 0, 100); |
| _assertPixelApprox(canvas, 5,105, 0,255,0,255, 2); |
| _assertPixelApprox(canvas, 55,105, 0,255,0,255, 2); |
| _assertPixelApprox(canvas, 105,105, 0,255,0,255, 2); |
| _assertPixelApprox(canvas, 155,105, 0,255,0,255, 2); |
| _assertPixelApprox(canvas, 245,105, 255,0,0,255, 2); |
| // Only the middle character. |
| renderClusters(tm.getTextClusters(2, 3), 0, 200); |
| _assertPixelApprox(canvas, 5,205, 255,0,0,255, 2); |
| _assertPixelApprox(canvas, 55,205, 255,0,0,255, 2); |
| _assertPixelApprox(canvas, 105,205, 0,255,0,255, 2); |
| _assertPixelApprox(canvas, 195,205, 255,0,0,255, 2); |
| _assertPixelApprox(canvas, 245,205, 255,0,0,255, 2); |
| |
| }, "Test that getTextClusters() and strokeTextCluster() correctly render different ranges of the input text."); |
| </script> |
