tor-browser

The Tor Browser
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out-of-memory.html (2161B)

      1 <!--
      2 Copyright (c) 2019 The Khronos Group Inc.
      3 Use of this source code is governed by an MIT-style license that can be
      4 found in the LICENSE.txt file.
      5 -->
      6 
      7 <!DOCTYPE html>
      8 <html>
      9 <head>
     10 <meta charset="utf-8">
     11 <title>WebGL Out Of Memory Test</title>
     12 <link rel="stylesheet" href="../resources/js-test-style.css"/>
     13 <script src="../js/js-test-pre.js"></script>
     14 <script src="../js/webgl-test-utils.js"></script>
     15 </head>
     16 <body>
     17 <div id="description"></div>
     18 <div id="console"></div>
     19 <canvas id="canvas" width="2" height="2"> </canvas>
     20 <script>
     21 "use strict";
     22 debug("This tests WebGL running out of memory.");
     23 
     24 debug("");
     25 debug("Canvas.getContext");
     26 
     27 var wtu = WebGLTestUtils;
     28 var gl = wtu.create3DContext("canvas");
     29 if (!gl) {
     30  testFailed("context does not exist");
     31 } else {
     32  testPassed("context exists");
     33 
     34  debug("");
     35  debug("Allocating shaders.");
     36 
     37  function makeBigShader() {
     38    var lines = [];
     39    var line = "// ";
     40    for (var ii = 0; ii < 1024; ++ii) {
     41      line += String.fromCharCode(48 + ii % 10);
     42    }
     43    for (var ii = 0; ii < 1024; ++ii) {
     44      lines[ii] = line;
     45    }
     46    var oneMB = lines.join();
     47    for (var ii = 0; ii < 64; ++ii) {
     48      lines[ii] = oneMB;
     49    }
     50    return lines.join("\n");
     51  }
     52 
     53  var shaderSource = makeBigShader();
     54  debug("created " + Math.floor(shaderSource.length / 1024 / 1024) + "MB shader");
     55 
     56  var intervalId;
     57  var count = 0;
     58 
     59  function makeShader() {
     60    ++count;
     61    debug ("creating shader #" + count + " mem = " + Math.floor(shaderSource.length * count / 1024 / 1024) + "MB");
     62    var shader = gl.createShader(gl.VERTEX_SHADER);
     63    if (shader == null) {
     64      window.clearInterval(intervalId);
     65      testPassed("createShader returns null");  // not sure this is a passing
     66      finishTest();
     67    } else {
     68      gl.shaderSource(shader, shaderSource);
     69      var err = gl.getError();
     70      if (err != gl.NO_ERROR) {
     71        window.clearInterval(intervalId);
     72        assertMsg(err == gl.OUT_OF_MEMORY, "shaderSource returns OUT_OF_MEMORY");
     73        finishTest();
     74      }
     75    }
     76  }
     77 
     78  intervalId = window.setInterval(makeShader, 1000/15);
     79 }
     80 </script>
     81 <script src="../js/js-test-post.js"></script>
     82 
     83 </body>
     84 </html>