| <!-- |
| Copyright (c) 2021 The Khronos Group Inc. |
| Use of this source code is governed by an MIT-style license that can be |
| found in the LICENSE.txt file. |
| --> |
| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| <script src="../../js/js-test-pre.js"></script> |
| <script src="../../js/webgl-test-utils.js"></script> |
| </head> |
| <body> |
| <div id="description"></div> |
| <div id="console"></div> |
| |
| <script> |
| "use strict"; |
| const wtu = WebGLTestUtils; |
| let gl; |
| |
| description("Ensure that required extensions are supported"); |
| |
| shouldBeNonNull("gl = wtu.create3DContext(undefined, undefined, 2)"); |
| |
| const supportedExts = gl.getSupportedExtensions(); |
| |
| function hasExt(name) { |
| return supportedExts.indexOf(name) >= 0; |
| } |
| |
| const has_s3tc = hasExt('WEBGL_compressed_texture_s3tc'); |
| const has_s3tc_srgb = hasExt('WEBGL_compressed_texture_s3tc_srgb'); |
| const has_rgtc = hasExt('EXT_texture_compression_rgtc'); |
| const has_etc = hasExt('WEBGL_compressed_texture_etc'); |
| |
| debug(`has_s3tc: ${has_s3tc}`); |
| debug(`has_s3tc_srgb: ${has_s3tc_srgb}`); |
| debug(`has_rgtc: ${has_rgtc}`); |
| debug(`has_etc: ${has_etc}`); |
| |
| shouldBeTrue("((has_s3tc && has_s3tc_srgb && has_rgtc) || has_etc)"); |
| |
| // ETC1 extension must not be exposed on WebGL 2.0 contexts without ETC2. |
| debug(""); |
| const has_etc1 = hasExt('WEBGL_compressed_texture_etc1'); |
| debug(`has_etc1: ${has_etc1}`); |
| shouldBeTrue("has_etc1 == has_etc"); |
| |
| debug(""); |
| var successfullyParsed = true; |
| </script> |
| |
| <script src="../../js/js-test-post.js"></script> |
| </body> |
| </html> |
