dom/canvas/test/webgl-conf/checkout/conformance2/wasm/buffersubdata-4gb-wasm-memory.html

   1 <!--
   2 Copyright (c) 2024 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 <!DOCTYPE html>
   7 <html>
   8 <head>
   9 <meta charset="utf-8">
  10 <title>bufferSubData test to Wasm Memory 4GB in size.</title>
  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 <canvas id="canvas" width="2" height="2" style="width: 40px; height: 40px;"></canvas>
  17 <div id="description"></div>
  18 <div id="console"></div>
  19 <script>
  20 "use strict";
  21 description(document.title);
  22 debug("Tests that bufferSubData can be called on WebAssembly Memory of 4GB in size.");
  23 debug("");
  24 let wtu = WebGLTestUtils;
  25 let gl = wtu.create3DContext("canvas", undefined, 2);
  26
  27 const PAGE = 65536;
  28 const SIZE = 4 * 1024 * 1024 * 1024 - PAGE;
  29 let view = new Uint8Array(new WebAssembly.Memory({ initial: SIZE / PAGE }).buffer);
  30 let expectedData = new Uint8Array([1, 2]);
  31 const length = expectedData.length;
  32 let srcOffset = SIZE - length;
  33 view.set(expectedData, srcOffset);
  34 const dstByteOffset = 4;
  35
  36 let buf = gl.createBuffer();
  37 gl.bindBuffer(gl.ARRAY_BUFFER, buf);
  38 gl.bufferData(gl.ARRAY_BUFFER, 8, gl.STATIC_DRAW);
  39 gl.bufferSubData(gl.ARRAY_BUFFER, dstByteOffset, view, srcOffset, length);
  40 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
  41
  42 let actualData = new Uint8Array(length);
  43 gl.getBufferSubData(gl.ARRAY_BUFFER, dstByteOffset, actualData);
  44 for (let i = 0; i < length; i++) {
  45   shouldBe(`actualData[${i}]`, `expectedData[${i}]`);
  46 }
  47
  48 var successfullyParsed = true;
  49 </script>
  50 <script src="../../js/js-test-post.js"></script>
  51 </body>
  52 </html>