dom/canvas/test/webgl-conf/checkout/conformance/rendering/triangle.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>Rendering Test</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 </head>
  16 <body>
  17 <canvas id="example" width="50" height="50">
  18 There is supposed to be an example drawing here, but it's not important.
  19 </canvas>
  20 <div id="description"></div>
  21 <div id="console"></div>
  22 <script id="vshader" type="x-shader/x-vertex">
  23 attribute vec4 vPosition;
  24 void main()
  25 {
  26     gl_Position = vPosition;
  27 }
  28 </script>
  29
  30 <script id="fshader" type="x-shader/x-fragment">
  31 void main()
  32 {
  33     gl_FragColor = vec4(1.0,0.0,0.0,1.0);
  34 }
  35 </script>
  36
  37 <script>
  38 "use strict";
  39 function init()
  40 {
  41     description(document.title);
  42
  43     var wtu = WebGLTestUtils;
  44     var gl = wtu.create3DContext("example");
  45     var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);
  46
  47     var vertexObject = gl.createBuffer();
  48     gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
  49     gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
  50     gl.enableVertexAttribArray(0);
  51     gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
  52
  53     gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
  54     gl.drawArrays(gl.TRIANGLES, 0, 3);
  55
  56     // Test several locations
  57     // First line should be all black
  58     wtu.checkCanvasRect(gl, 0, 0, 50, 1, [0, 0, 0, 0]);
  59
  60     // Line 15 should be red for at least 10 red pixels starting 20 pixels in
  61     wtu.checkCanvasRect(gl, 20, 15, 10, 1, [255, 0, 0, 255]);
  62
  63     // Last line should be all black
  64     wtu.checkCanvasRect(gl, 0, 49, 50, 1, [0, 0, 0, 0]);
  65 }
  66
  67 init();
  68 var successfullyParsed = true;
  69 </script>
  70 <script src="../../js/js-test-post.js"></script>
  71
  72 </body>
  73 </html>