dom/canvas/test/webgl-conf/checkout/conformance2/uniforms/large-uniform-buffers.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 large uniform buffers 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 in vec4 a_vertex;
  17 void main(void) {
  18   gl_Position = a_vertex;
  19 }
  20 </script>
  21 <script id="fshader" type="x-shader/x-fragment">#version 300 es
  22 precision mediump float;
  23 layout (std140) uniform color_ubo {
  24   vec4 color;
  25 };
  26 out vec4 fragColor;
  27 void main(void) {
  28   fragColor = color;
  29 }
  30 </script>
  31 </head>
  32 <body>
  33 <canvas id="example" width="100", height="100"></canvas>
  34 <div id="description"></div>
  35 <div id="console"></div>
  36 <script>
  37 "use strict";
  38 debug("");
  39 description("Test for UBOs sized over 65536 - https://bugs.chromium.org/p/angleproject/issues/detail?id=3388");
  40
  41 var wtu = WebGLTestUtils;
  42 var gl = wtu.create3DContext("example", undefined, 2);
  43
  44 function runTest() {
  45     var program = wtu.setupProgram(gl, ['vshader', 'fshader'], ['a_vertex']);
  46     var uboIndex = gl.INVALID_INDEX;
  47     if (program)
  48         uboIndex = gl.getUniformBlockIndex(program, "color_ubo");
  49     if (!program || uboIndex == gl.INVALID_INDEX) {
  50         testFailed("Loading program failed");
  51         return;
  52     }
  53     testPassed("Loading program succeeded");
  54
  55     var vertices = new Float32Array([
  56         -1, -1, 0,
  57          1, -1, 0,
  58         -1,  1, 0,
  59          1,  1, 0
  60     ]);
  61     var vertexBuf = gl.createBuffer();
  62     gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuf);
  63     gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);
  64     gl.enableVertexAttribArray(0);
  65     gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
  66
  67     var indexBuf = gl.createBuffer();
  68     gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuf);
  69     gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Int16Array([ 0, 1, 2, 2, 1, 3 ]), gl.STATIC_DRAW);
  70
  71     var uboDataSize = gl.getActiveUniformBlockParameter(
  72         program, uboIndex, gl.UNIFORM_BLOCK_DATA_SIZE);
  73     if (uboDataSize == 0) {
  74         testFailed("uniform block data size invalid");
  75         return;
  76     }
  77
  78     var uboBuf = gl.createBuffer();
  79     var uboData = new Float32Array(0x20000);
  80
  81     var offs0 = 0x00000;
  82     // Red
  83     uboData[offs0 + 0] = 1;
  84     uboData[offs0 + 1] = 0;
  85     uboData[offs0 + 2] = 0;
  86     uboData[offs0 + 3] = 1;
  87
  88     var offs1 = 0x10000;
  89     const alignment = gl.getParameter(gl.UNIFORM_BUFFER_OFFSET_ALIGNMENT);
  90     if (offs1 % alignment != 0)
  91         testFailed("Platform has a strange uniform buffer offset alignment requirement: " + alignment);
  92
  93     // Green
  94     uboData[offs1 + 0] = 0;
  95     uboData[offs1 + 1] = 1;
  96     uboData[offs1 + 2] = 0;
  97     uboData[offs1 + 3] = 1;
  98
  99     gl.uniformBlockBinding(program, uboIndex, 0);
 100     gl.bindBufferBase(gl.UNIFORM_BUFFER, 0, uboBuf);
 101     gl.bufferData(gl.UNIFORM_BUFFER, uboData, gl.STATIC_DRAW);
 102
 103     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "No errors from setup");
 104
 105     debug("draw lower triangle - should be red");
 106     gl.bindBufferRange(gl.UNIFORM_BUFFER, 0, uboBuf, offs0 * 4, 0x10);
 107     gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0);
 108     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "No errors from draw");
 109
 110     debug("draw upper triangle - should be green");
 111     var uboBuf2 = gl.createBuffer();
 112     gl.bindBufferRange(gl.UNIFORM_BUFFER, 0, uboBuf, offs1 * 4, 0x10);
 113     gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 6);
 114     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "No errors from draw");
 115
 116     var width = 100, height = 100;
 117     wtu.checkCanvasRectColor(gl, 0, 0, width/2-5, height/2-5, [255, 0, 0, 255], 2,
 118         function() { testPassed("lower left should be red"); },
 119         function() { testFailed("lower left should be red"); });
 120     wtu.checkCanvasRectColor(gl, width/2+5, height/2+5, width/2-5, height/2-5, [0, 255, 0, 255], 2,
 121         function() { testPassed("top right should be green"); },
 122         function() { testFailed("top right should be green"); });
 123 }
 124
 125 if (!gl) {
 126     testFailed("WebGL context creation failed");
 127 } else {
 128     testPassed("WebGL context creation succeeded");
 129     runTest();
 130 }
 131
 132 debug("");
 133 var successfullyParsed = true;
 134 </script>
 135 <script src="../../js/js-test-post.js"></script>
 136
 137 </body>
 138 </html>