dom/canvas/test/webgl-conf/checkout/conformance2/extensions/required-extensions.html

   1 <!--
   2 Copyright (c) 2021 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 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  12 <script src="../../js/js-test-pre.js"></script>
  13 <script src="../../js/webgl-test-utils.js"></script>
  14 </head>
  15 <body>
  16 <div id="description"></div>
  17 <div id="console"></div>
  18
  19 <script>
  20 "use strict";
  21 const wtu = WebGLTestUtils;
  22 let gl;
  23
  24 description("Ensure that required extensions are supported");
  25
  26 shouldBeNonNull("gl = wtu.create3DContext(undefined, undefined, 2)");
  27
  28 const supportedExts = gl.getSupportedExtensions();
  29
  30 function hasExt(name) {
  31     return supportedExts.indexOf(name) >= 0;
  32 }
  33
  34 const has_s3tc = hasExt('WEBGL_compressed_texture_s3tc');
  35 const has_s3tc_srgb = hasExt('WEBGL_compressed_texture_s3tc_srgb');
  36 const has_rgtc = hasExt('EXT_texture_compression_rgtc');
  37 const has_etc = hasExt('WEBGL_compressed_texture_etc');
  38
  39 debug(`has_s3tc: ${has_s3tc}`);
  40 debug(`has_s3tc_srgb: ${has_s3tc_srgb}`);
  41 debug(`has_rgtc: ${has_rgtc}`);
  42 debug(`has_etc: ${has_etc}`);
  43
  44 shouldBeTrue("((has_s3tc && has_s3tc_srgb && has_rgtc) || has_etc)");
  45
  46 // ETC1 extension must not be exposed on WebGL 2.0 contexts without ETC2.
  47 debug("");
  48 const has_etc1 = hasExt('WEBGL_compressed_texture_etc1');
  49 debug(`has_etc1: ${has_etc1}`);
  50 shouldBeTrue("has_etc1 == has_etc");
  51
  52 debug("");
  53 var successfullyParsed = true;
  54 </script>
  55
  56 <script src="../../js/js-test-post.js"></script>
  57 </body>
  58 </html>