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uniform-buffers-state-restoration.html (2934B)

      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 Uniform Buffers State Restoration 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 id='vshader' type='x-shader/x-vertex'>#version 300 es
     16 layout(location=0) in vec3 p;
     17 void main()
     18 {
     19    gl_Position = vec4(p.xyz, 1.0);
     20 }
     21 </script>
     22 <script id='fshader' type='x-shader/x-fragment'>#version 300 es
     23 precision mediump float;
     24 layout(location=0) out vec4 oColor;
     25 
     26 uniform UBOData {
     27    vec4 uboColor;
     28 };
     29 
     30 void main()
     31 {
     32    oColor = uboColor;
     33 }
     34 </script>
     35 </head>
     36 <body>
     37 <div id="description"></div>
     38 <canvas id="canvas" style="width: 50px; height: 50px;"> </canvas>
     39 <div id="console"></div>
     40 <script>
     41 "use strict";
     42 description("This is a regression test verifying that uniform buffer bindings persist correctly across frames: <a href='http://crbug.com/722060'>crbug.com/722060</a>");
     43 
     44 debug("");
     45 
     46 var wtu = WebGLTestUtils;
     47 var canvas = document.getElementById("canvas");
     48 var gl = wtu.create3DContext(canvas, null, 2);
     49 var greenBuf = null;
     50 var throwawayBuf = null;
     51 var red = new Float32Array([1, 0, 0, 1]);
     52 var green = new Float32Array([0, 1, 0, 1]);
     53 var frame = 0;
     54 
     55 if (!gl) {
     56    testFailed("WebGL context does not exist");
     57 } else {
     58    testPassed("WebGL context exists");
     59 
     60    initTest();
     61    wtu.waitForComposite(runTest);
     62 }
     63 
     64 function initTest() {
     65    wtu.setupUnitQuad(gl);
     66 
     67    var program = wtu.setupProgram(gl, ['vshader', 'fshader']);
     68    if (!program) {
     69        testFailed("Could not compile shader with uniform blocks without error");
     70        return;
     71    }
     72    var uboLocation = gl.getUniformBlockIndex(program, "UBOData");
     73    gl.uniformBlockBinding(program, uboLocation, 0);
     74 
     75    greenBuf = gl.createBuffer();
     76    throwawayBuf = gl.createBuffer();
     77    wtu.glErrorShouldBe(gl, gl.NO_ERROR, "createBuffer should not set an error");
     78 
     79    // Bind uniform buffer (both index 0 AND generic binding points) to greenBuf
     80    gl.bindBufferBase(gl.UNIFORM_BUFFER, 0, greenBuf);
     81    gl.bufferData(gl.UNIFORM_BUFFER, green, gl.STATIC_DRAW);
     82    // Bind throwaray uniform buffer (from only the generic binding point)
     83    gl.bindBuffer(gl.UNIFORM_BUFFER, throwawayBuf);
     84 }
     85 
     86 function runTest() {
     87    // ONLY the binding point at index 0 (not the generic binding point) should be greenBuf.
     88    // (The generic binding point should point at throwawayBuf.)
     89    // So this bufferData should go into throwawayBuf.
     90    gl.bufferData(gl.UNIFORM_BUFFER, red, gl.STATIC_DRAW);
     91    wtu.clearAndDrawUnitQuad(gl);
     92    wtu.checkCanvas(gl, [0, 255, 0, 255], "draw call should set canvas to green", 2);
     93    finishTest();
     94 }
     95 
     96 debug("");
     97 var successfullyParsed = true;
     98 </script>
     99 
    100 </body>
    101 </html>