dom/canvas/test/webgl-conf/checkout/conformance/extensions/webgl-compressed-texture-etc1.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 WEBGL_compressed_texture_etc1 Conformance Tests</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 <script src="../../js/tests/compressed-texture-utils.js"></script>
  16 </head>
  17 <body>
  18 <div id="description"></div>
  19 <div id="console"></div>
  20 <script>
  21 "use strict";
  22 description("This test verifies the functionality of the WEBGL_compressed_texture_etc1 extension, if it is available.");
  23
  24 debug("");
  25
  26 var validFormats = {
  27   COMPRESSED_RGB_ETC1_WEBGL: 0x8D64,
  28 };
  29
  30 function expectedByteLength(width, height, format) {
  31   return Math.floor((width + 3) / 4) * Math.floor((height + 3) / 4) * 8;
  32 }
  33
  34 function getBlockDimensions(format) {
  35   return {width: 4, height: 4};
  36 }
  37
  38 var wtu = WebGLTestUtils;
  39 var ctu = CompressedTextureUtils;
  40 var contextVersion = wtu.getDefault3DContextVersion();
  41 var gl = wtu.create3DContext();
  42 var WEBGL_compressed_texture_etc1;
  43
  44 var formats = null;
  45
  46 function runTest() {
  47   if (!gl) {
  48     testFailed("context does not exist");
  49   } else {
  50     testPassed("context exists");
  51
  52     ctu.testCompressedFormatsUnavailableWhenExtensionDisabled(gl, validFormats, expectedByteLength, 4);
  53
  54     WEBGL_compressed_texture_etc1 = gl.getExtension("WEBGL_compressed_texture_etc1");
  55
  56     wtu.runExtensionSupportedTest(gl, "WEBGL_compressed_texture_etc1", WEBGL_compressed_texture_etc1 !== null);
  57
  58     if (WEBGL_compressed_texture_etc1 !== null) {
  59       // Test that enum values are listed correctly in supported formats and in the extension object.
  60       ctu.testCompressedFormatsListed(gl, validFormats);
  61       ctu.testCorrectEnumValuesInExt(WEBGL_compressed_texture_etc1, validFormats);
  62       // Test that texture upload buffer size is validated correctly.
  63       ctu.testFormatRestrictionsOnBufferSize(gl, validFormats, expectedByteLength, getBlockDimensions);
  64     }
  65   }
  66 }
  67
  68 runTest();
  69
  70 var successfullyParsed = true;
  71 </script>
  72 <script src="../../js/js-test-post.js"></script>
  73 </body>
  74 </html>