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Bug 1796779 - Add a test for serialization of '.font' on offscreen canvas2d. r=gfx-reviewers,jrmuizel

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Differential Revision: https://phabricator.services.mozilla.com/D159946
This commit is contained in:
Jonathan Kew 2022-10-21 17:09:13 +00:00
parent 51f703718f
commit 15cc45b65a
2 changed files with 60 additions and 0 deletions
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1
dom/canvas/test/mochitest.ini
View File

@ -165,6 +165,7 @@ tags = imagebitmap
[test_2d_composite_canvaspattern_setTransform.html]
[test_filter.html]
[test_filter_tainted.html]
[test_offscreencanvas_font.html]
[test_offscreencanvas_toblob.html]
subsuite = gpu
tags = offscreencanvas

59
dom/canvas/test/test_offscreencanvas_font.html Normal file
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@ -0,0 +1,59 @@
<!DOCTYPE HTML>
<html>
<head>
<title>Serialization of font on OffscreenCanvas2d</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
</head>
<body>
<canvas id="c">
<script>
SimpleTest.waitForExplicitFinish();
function testFontShorthand(ctx, font) {
ctx.font = font;
let w1 = ctx.measureText("Hello World").width;
let f = ctx.font;
ctx.font = f;
let w2 = ctx.measureText("Hello World").width;
ok(w1 === w2, "serialization and re-setting of \"" +
font + "\" as \"" + f + "\" is idempotent");
}
const tests = [
"12px serif",
"12px/1.4 serif",
"italic 12px serif",
"oblique 12px serif",
"bold 12px serif",
"bold italic 12px serif",
"condensed bold italic 12px serif",
"500 italic 12px serif",
"italic 500 12px serif",
];
function runTest() {
let canvas = new OffscreenCanvas(100, 100);
let ctx = canvas.getContext("2d");
tests.forEach((t) => {
testFontShorthand(ctx, t);
});
// Although the bug that motivated this test was specific to offscreen canvas,
// let's also check that it works with a <canvas> element.
ctx = document.getElementById("c").getContext("2d");
tests.forEach((t) => {
testFontShorthand(ctx, t);
});
SimpleTest.finish();
}
SpecialPowers.pushPrefEnv({'set': [
['gfx.offscreencanvas.enabled', true],
]}, runTest);
</script>
</body>
</html>