The Tor Browser: content/canvas/test/webgl-conformance/extra/out-of-vram.html@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 <!--

     2 Copyright (c) 2009 The Chromium Authors. All rights reserved.

     3 Use of this source code is governed by a BSD-style license that can be

     4 found in the LICENSE file.

     5 -->

     6 <!DOCTYPE html>

     7 <html>

     8 <head>

     9 <meta charset="utf-8">

    10 <title>WebGL Out Of VRAM Test</title>

    11 <link rel="stylesheet" href="../resources/js-test-style.css"/>

    12 <script src="../resources/desktop-gl-constants.js" type="text/javascript"></script>

    13 <script src="../resources/js-test-pre.js"></script>

    14 <script src="../conformance/resources/webgl-test.js"></script>

    15 <script src="../conformance/resources/webgl-test-utils.js"></script>

    16 </head>

    17 <body>

    18 <div id="description"></div>

    19 <div id="console"></div>

    20 <canvas id="canvas" width="2" height="2"> </canvas>

    21 <script>

    22 debug("This tests WebGL running out of vram.");

    24 debug("");

    25 debug("Canvas.getContext");

    27 var wtu = WebGLTestUtils;

    28 var canvas = document.getElementById("canvas");

    29 try {

    30   var gl = create3DContext(canvas);

    31 } catch(e) {

    32 }

    33 if (!gl) {

    34   testFailed("could not create context");

    35 } else {

    36   testPassed("context exists");

    38   var args = wtu.getUrlArguments();

    40   canvas.addEventListener('webglcontextlost', contextLost, false);

    42   function contextLost(e) {

    43     e.preventDefault();

    44     debug("***context lost***");

    45   }

    47   function contextRestored(e) {

    48     debug("***context restored***");

    49   }

    51   debug("");

    52   debug("Allocating textures.");

    54   var intervalId;

    55   var count = 0;

    56   var textureMem = 0;

    57   var textures = [];

    58   var size = 2048;

    59   var limit = (args.limit ? args.limit : 8192) * 1024 * 1024;

    61   debug("limit: " + InMB(limit))

    63   function InMB(v) {

    64     return "" + Math.floor(v / 1024 / 1024) + "MB";

    65   }

    67   function makeTexture() {

    68     if (gl.isContextLost()) {

    69       stop("out of memory");

    70       return;

    71     }

    72     ++count;

    73     textureMem += size * size * 4;

    74     if (textureMem > limit) {

    75       stop("reached limit");

    76       return;

    77     }

    78     debug ("creating texture #" + count + " mem = " + InMB(textureMem));

    79     var texture = gl.createTexture();

    80     textures.push(texture);

    81     gl.bindTexture(gl.TEXTURE_2D, texture);

    82     gl.texImage2D(gl.TEXTURE_2D,

    83                   0,                 // level

    84                   gl.RGBA,           // internalFormat

    85                   size,              // width

    86                   size,              // height

    87                   0,                 // border

    88                   gl.RGBA,           // format

    89                   gl.UNSIGNED_BYTE,  // type

    90                   null);             // data

    91     var err = gl.getError();

    92     if (err != gl.NO_ERROR) {

    93       stop("out of memory");

    94       return;

    95     }

    96   }

    98   intervalId = window.setInterval(makeTexture, 1000 / 15);

   100 }

   102 function stop(msg) {

   103   window.clearInterval(intervalId);

   104   testPassed(msg);

   105   finish();

   106 }

   108 function finish() {

   109   debug("");

   110   successfullyParsed = true;

   111 }

   113 </script>

   114 </body>

   115 </html>

The Tor Browser / file revision