browser/devtools/canvasdebugger/test/doc_simple-canvas-deep-stack.html

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1 <!-- Any copyright is dedicated to the Public Domain.
2 http://creativecommons.org/publicdomain/zero/1.0/ -->
3 <!doctype html>
4
5 <html>
6 <head>
7 <meta charset="utf-8"/>
8 <title>Canvas inspector test page</title>
9 </head>
10
11 <body>
12 <canvas width="128" height="128"></canvas>
13
14 <script type="text/javascript;version=1.8">
15 "use strict";
16
17 var ctx = document.querySelector("canvas").getContext("2d");
18
19 function drawRect(fill, size) {
20 function A() {
21 function B() {
22 function C() {
23 ctx.fillStyle = fill;
24 ctx.fillRect(size[0], size[1], size[2], size[3]);
25 }
26 C();
27 }
28 B();
29 }
30 A();
31 }
32
33 function drawScene() {
34 ctx.clearRect(0, 0, 128, 128);
35 drawRect("rgb(192, 192, 192)", [0, 0, 128, 128]);
36 drawRect("rgba(0, 0, 192, 0.5)", [30, 30, 55, 50]);
37 drawRect("rgba(192, 0, 0, 0.5)", [10, 10, 55, 50]);
38
39 window.requestAnimationFrame(drawScene);
40 }
41
42 drawScene();
43 </script>
44 </body>
45
46 </html>

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