dom/canvas/test/webgl-conf/checkout/conformance2/context/context-resize-changes-buffer-binding-bug.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>WebGL2 Context Resize Bug 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="test"></canvas>
  20 <script>
  21 "use strict";
  22 description("This test verifies canvas resize does not affect PIXEL_UNPACK_BUFFER binding.");
  23
  24 var wtu = WebGLTestUtils;
  25 var canvas = document.getElementById("test");
  26 var gl = wtu.create3DContext(canvas, null, 2);
  27 if (!gl) {
  28   testFailed("context does not exist");
  29 } else {
  30   testPassed("context exists");
  31   var texture1= gl.createTexture();
  32   gl.bindTexture(gl.TEXTURE_3D, texture1);
  33   var buffer0= gl.createBuffer();
  34   gl.bindBuffer(gl.PIXEL_UNPACK_BUFFER, buffer0);
  35
  36   canvas.width = 682;
  37   // Resizing canvas incorrectly cleared the PIXEL_UNPACK_BUFFER binding to 0
  38   // and caused a crash from the following line in Chrome. crbug.com/673929.
  39   gl.texImage3D(gl.TEXTURE_3D, 1, gl.R8,  225,664 , 143, 0,
  40       gl.LUMINANCE_ALPHA, gl.UNSIGNED_SHORT_4_4_4_4, 0x41414141);
  41   testPassed("no crash from texImage3D");
  42 }
  43 debug("");
  44 var successfullyParsed = true;
  45 </script>
  46 <script src="../../js/js-test-post.js"></script>
  47
  48 </body>
  49 </html>