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Base: Add a test page for Path2D

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Neither of the tests here actually passes properly right now. It's a
little more aspirational...

In the first one, the circle draws in the wrong place due apparently to
existing bugs in `CanvasRenderingContext2D::ellipse()`.

In the second, I just haven't yet implemented creating a Path2D from an
SVG path string, because that's going to take a fair bit of untangling
first.
This commit is contained in:
Sam Atkins 2022-08-11 17:44:58 +01:00 • committed by Andreas Kling
parent 6644f3ab44
commit 9075dea3a8
Notes: sideshowbarker 2024-07-17 08:17:42 +09:00
2 changed files with 41 additions and 0 deletions
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40
Base/res/html/misc/canvas-path2d.html Normal file
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<!doctype html>
<html>
<head>
<meta charset="UTF-8" />
<title>Path2D test</title>
</head>
<body>
<h1>Path2D test</h1>
<p>These examples are taken from <a href="https://developer.mozilla.org/en-US/docs/Web/API/Path2D/Path2D">MDN</a>.</p>
<h2>Basic example</h2>
<p>Should be a square and a circle, both as outlines.</p>
<canvas id="canvas"></canvas>
<h2>SVG Path example</h2>
<p>Should display a filled black square.</p>
<canvas id="canvas-2"></canvas>
<script>
// Basic example
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
let path1 = new Path2D();
path1.rect(10, 10, 100,100);
let path2 = new Path2D(path1);
path2.moveTo(220, 60);
path2.arc(170, 60, 50, 0, 2 * Math.PI);
ctx.stroke(path2);
// SVG Path example
const canvas2 = document.getElementById('canvas-2');
const ctx2 = canvas2.getContext('2d');
let p = new Path2D('M10 10 h 80 v 80 h -80 Z');
ctx2.fill(p);
</script>
</body>
</html>

1
Base/res/html/misc/welcome.html
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@ -178,6 +178,7 @@
<li><a href="img-canvas.html">canvas drawImage() test</a></li>
<li><a href="canvas-path.html">canvas path house!</a></li>
<li><a href="trigonometry.html">canvas + trigonometry functions</a></li>
<li><a href="canvas-path2d.html">Path2D</a></li>
<li><a href="webgl-clear-color-and-multiple-contexts.html">WebGL Demo - Multiple Contexts and glClear(Color)</a></li>
<li><h3>Wasm</h3></li>
<li><a href="mandelbrot-wasm.html">WebAssembly Mandelbrot Rendering Demo</a></li>