triangle.html (1948B)
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>