dom/canvas/test/webgl-conf/checkout/conformance2/wasm/teximage2d-4gb-wasm-memory.html

   1 <!--
   2 Copyright (c) 2023 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>gl.texImage2D() 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 gl.texImage2D() can be called on WebAssembly Memory 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; // when uint32_t size is max, we can only reach one page short of full 4GB
  29 let view = new Uint8Array(new WebAssembly.Memory({ initial: SIZE/PAGE }).buffer);
  30
  31 function compileShader(type, src) {
  32   let shader = gl.createShader(type);
  33   gl.shaderSource(shader, src);
  34   gl.compileShader(shader);
  35   let log = gl.getShaderInfoLog(shader);
  36   if (log) debug(log);
  37   return shader;
  38 }
  39
  40 function createProgram(vs, fs) {
  41   let program = gl.createProgram();
  42   gl.attachShader(program, vs);
  43   gl.attachShader(program, fs);
  44   gl.bindAttribLocation(program, 0, 'pos');
  45   gl.linkProgram(program);
  46   gl.useProgram(program);
  47   return program;
  48 }
  49
  50 let program = createProgram(
  51   compileShader(gl.VERTEX_SHADER, `
  52     varying vec2 uv;
  53     attribute vec2 pos;
  54     void main() { uv = pos; gl_Position = vec4(pos*2.0-vec2(1.0,1.0),0,1); }`),
  55   compileShader(gl.FRAGMENT_SHADER, `
  56     precision lowp float;
  57     uniform sampler2D tex;
  58     varying vec2 uv;
  59     void main() { gl_FragColor = texture2D(tex,uv); }`));
  60
  61 gl.bindBuffer(gl.ARRAY_BUFFER, gl.createBuffer());
  62 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([0, 0, 1, 0, 0, 1, 1, 1]), gl.STATIC_DRAW);
  63 gl.vertexAttribPointer(0, 2, gl.FLOAT, gl.FALSE, 0, 0);
  64 gl.enableVertexAttribArray(0);
  65
  66 let texture = gl.createTexture();
  67 gl.bindTexture(gl.TEXTURE_2D, texture);
  68
  69 // Test uploading an image
  70 const expectedColor = [42, 84, 128, 255];
  71 const offset = SIZE - 4;
  72 view.set(expectedColor, offset);
  73 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, view, offset);
  74 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
  75
  76 // Test rendering with that image
  77 gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
  78
  79 // Verify that we rendered what we expected
  80 wtu.checkCanvasRect(gl, 0, 0, 1, 1, expectedColor, "texImage2D produced expected color");
  81 var successfullyParsed = true;
  82 </script>
  83 <script src="../../js/js-test-post.js"></script>
  84 </body>
  85 </html>