dom/canvas/test/webgl-conf/checkout/extra/out-of-memory.html

   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>