point-no-attributes-stress.html (1642B)
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"> 15 void main() 16 { 17 gl_PointSize = 1.0; 18 gl_Position = vec4(0.0, 0.0, 0.0, 1.0); 19 } 20 </script> 21 22 <script id="fshader" type="x-shader/x-fragment"> 23 precision mediump float; 24 25 void main() 26 { 27 gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0); 28 } 29 </script> 30 </head> 31 <body> 32 <canvas id="testbed" width="1" height="1" style="width: 100px; height: 100px;"></canvas> 33 <div id="description"></div> 34 <div id="console"></div> 35 <script> 36 "use strict"; 37 description('Stress test drawing a huge number of points without enabling any attributes'); 38 39 debug('This test stresses drawing a large number of points and workarounds created to run WebGL with simulated attrib 0'); 40 41 if (confirm('After clicking OK your machine may become unresponsive or crash.')) { 42 var wtu = WebGLTestUtils; 43 var gl = wtu.create3DContext('testbed'); 44 45 var program1 = wtu.setupProgram(gl, ['vshader', 'fshader']); 46 47 gl.enable(gl.BLEND); 48 49 debug('Draw 2^31 points with a shader that takes no attributes and verify it fills the whole canvas.'); 50 51 gl.drawArrays(gl.POINTS, 0, Math.pow(2, 31) - 1); 52 wtu.glErrorShouldBe(gl, gl.NO_ERROR); 53 wtu.checkCanvas(gl, [0, 255, 0, 255]); 54 } 55 56 var successfullyParsed = true; 57 </script> 58 <script src="../js/js-test-post.js"></script> 59 60 </body> 61 </html>