dom/canvas/test/webgl-conf/checkout/conformance2/attribs/render-no-enabled-attrib-arrays.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 <title>Verify drawing without any enabled vertex attribute arrays</title>
  11 <meta charset="utf-8">
  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 vec4 inColor;
  17 out vec4 varyingColor;
  18 void main()
  19 {
  20     varyingColor = inColor;
  21     gl_Position = vec4(0.0, 0.0, 0.0, 1.0);
  22     gl_PointSize = 1.0;
  23 }
  24 </script>
  25 <script id='fshader' type='x-shader/x-fragment'>#version 300 es
  26 precision mediump float;
  27 in vec4 varyingColor;
  28 layout(location=0) out vec4 oColor;
  29 void main()
  30 {
  31     oColor = varyingColor;
  32 }
  33 </script>
  34 <script>
  35 "use strict";
  36
  37 function runTest() {
  38     var wtu = WebGLTestUtils;
  39     var gl = wtu.create3DContext("testCanvas", undefined, 2);
  40     if (!gl) {
  41         testFailed('could not create context');
  42         return;
  43     }
  44     var program = wtu.setupProgram(gl, ['vshader', 'fshader']);
  45     gl.disableVertexAttribArray(0);
  46     gl.vertexAttrib4f(0, 0.0, 1.0, 0.0, 1.0);
  47     gl.clearColor(1, 0, 0, 1);
  48     gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
  49     gl.drawArrays(gl.POINTS, 0, 1);
  50     wtu.checkCanvas(gl, [ 0, 255, 0, 255 ], "Canvas should be covered by a single green point");
  51 }
  52 </script>
  53 </head>
  54 <body>
  55 <canvas id="testCanvas" width="1" height="1" style="width: 32px; height: 32px;"></canvas>
  56 <div id="description"></div>
  57 <div id="console"></div>
  58 <script>
  59 "use strict";
  60 description();
  61 runTest();
  62 var successfullyParsed = true;
  63 </script>
  64 <script src="../../js/js-test-post.js"></script>
  65 </body>
  66 </html>