dom/canvas/test/webgl-conf/checkout/conformance2/attribs/gl-vertex-attrib-i-render.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 <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 <script id='vshader' type='x-shader/x-vertex'>#version 300 es
  15 layout(location=0) in ivec2 p;
  16 layout(location=1) in ivec4 a;
  17 void main()
  18 {
  19     gl_Position = vec4(p.x + a.x + a.y + a.z + a.w, p.y, 0.0, 10.0);
  20 }
  21 </script>
  22 <script id='vshader_unsigned' type='x-shader/x-vertex'>#version 300 es
  23 layout(location=0) in ivec2 p;
  24 layout(location=1) in uvec4 a;
  25 void main()
  26 {
  27     gl_Position = vec4(p.x + int(a.x + a.y + a.z + a.w), p.y, 0.0, 10.0);
  28 }
  29 </script>
  30 <script id='fshader' type='x-shader/x-fragment'>#version 300 es
  31 precision mediump float;
  32 layout(location=0) out vec4 oColor;
  33 void main()
  34 {
  35     oColor = vec4(1.0, 0.0, 0.0, 1.0);
  36 }
  37 </script>
  38 <script>
  39 "use strict";
  40 function checkRedPortion(gl, w, low, high) {
  41     var buf = new Uint8Array(w * w * 4);
  42     gl.readPixels(0, 0, w, w, gl.RGBA, gl.UNSIGNED_BYTE, buf);
  43     var i = 0;
  44     for (; i < w; ++i) {
  45         if (buf[i * 4 + 0] == 255 && buf[i * 4 + 1] == 0 && buf[i * 4 + 2] == 0 && buf[i * 4 + 3] == 255) {
  46             break;
  47         }
  48     }
  49     return low <= i && i <= high;
  50 }
  51
  52 function runTest() {
  53     var wtu = WebGLTestUtils;
  54     var gl = wtu.create3DContext('testbed', { preserveDrawingBuffer : true }, 2);
  55     if (!gl) {
  56         testFailed('could not create context');
  57         return;
  58     }
  59     var program = wtu.setupProgram(gl, ['vshader', 'fshader']);
  60     var program_unsigned = wtu.setupProgram(gl, ['vshader_unsigned', 'fshader']);
  61
  62     gl.enableVertexAttribArray(0);
  63     var pos = gl.createBuffer();
  64     gl.bindBuffer(gl.ARRAY_BUFFER, pos);
  65     gl.bufferData(gl.ARRAY_BUFFER, new Int32Array([-10, -10, 10, -10, -10, 10, 10, 10]), gl.STATIC_DRAW);
  66
  67     gl.vertexAttribIPointer(0, 2, gl.INT, 4 * 2, 0);
  68
  69     debug('Test vertexAttribI4[ui][v] by setting different combinations that add up to 15 and use that when rendering.');
  70     var vals = [[2, -3, 6, 10], [1, 3, 1, 10], [-10, 3, 2, 20], [5, 6, 2, 2]];
  71     var tests = ['vertexAttribI4i', 'vertexAttribI4ui', 'vertexAttribI4iv', 'vertexAttribI4uiv'];
  72
  73     for (var ii = 0; ii < 4; ++ii) {
  74         if (ii % 2 == 0) {
  75             gl.useProgram(program);
  76         } else {
  77             gl.useProgram(program_unsigned);
  78         }
  79         gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
  80         if (ii < 2) {
  81             gl[tests[ii]](1, vals[ii][0], vals[ii][1], vals[ii][2], vals[ii][3]);
  82         } else {
  83             gl[tests[ii]](1, vals[ii]);
  84         }
  85         gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
  86
  87         if (checkRedPortion(gl, 50, 50 * 0.7, 50 * 0.8)) {
  88             testPassed('Attribute of ' + tests[ii] + ' was set correctly');
  89         } else {
  90             testFailed('Attribute of ' + tests[ii] + ' was not set correctly');
  91         }
  92     }
  93 }
  94 </script>
  95 </head>
  96 <body>
  97 <canvas id="testbed" width="50" height="50"></canvas>
  98 <div id="description"></div>
  99 <div id="console"></div>
 100 <script>
 101 "use strict";
 102 description('Verify that using constant attributes for vertexAttribI* works.');
 103 runTest();
 104 var successfullyParsed = true;
 105 </script>
 106 <script src="../../js/js-test-post.js"></script>
 107 </body>
 108 </html>