gl-min-attribs.html (2208B)
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>WebGL the minimum number of attributes are supported.</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="4" height="4" style="width: 40px; height: 30px;"></canvas> 18 <div id="description"></div> 19 <div id="console"></div> 20 <script id="vshader" type="x-shader/x-vertex"> 21 attribute vec4 vPosition; 22 attribute vec4 v0; 23 attribute vec4 v1; 24 attribute vec4 v2; 25 attribute vec4 v3; 26 attribute vec4 v4; 27 attribute vec4 v5; 28 attribute vec4 v6; 29 varying vec4 color; 30 void main() 31 { 32 gl_Position = vPosition; 33 color = v0 + v1 + v2 + v3 + v4 + v5 + v6; 34 } 35 </script> 36 37 <script id="fshader" type="x-shader/x-fragment"> 38 precision mediump float; 39 varying vec4 color; 40 void main() 41 { 42 gl_FragColor = color; 43 } 44 </script> 45 <script> 46 "use strict"; 47 description(document.title); 48 var wtu = WebGLTestUtils; 49 var gl = wtu.create3DContext("example"); 50 var program = wtu.setupTexturedQuad(gl); 51 52 var program = wtu.setupProgram( 53 gl, 54 ['vshader', 'fshader'], 55 ['vPosition', 'v0', 'v1', 'v2', 'v3', 'v4', 'v5', 'v6'], 56 [0, 1, 2, 3, 4, 5, 6, 7]); 57 58 for (var ii = 0; ii < 7; ++ii) { 59 var v = (ii + 1) / 28; 60 var vertexObject = gl.createBuffer(); 61 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); 62 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 63 v, v/2, v/4, v/8, 64 v, v/2, v/4, v/8, 65 v, v/2, v/4, v/8, 66 v, v/2, v/4, v/8, 67 v, v/2, v/4, v/8, 68 v, v/2, v/4, v/8]), gl.STATIC_DRAW); 69 gl.enableVertexAttribArray(ii + 1); 70 gl.vertexAttribPointer(ii + 1, 4, gl.FLOAT, false, 0, 0); 71 } 72 73 wtu.clearAndDrawUnitQuad(gl); 74 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup."); 75 wtu.checkCanvasRect(gl, 0, 0, gl.canvas.width, gl.canvas.height, [255, 127, 64, 32], "Should render 255,127,64,32 (+/-1)", 1); 76 77 var successfullyParsed = true; 78 79 </script> 80 </body> 81 <script src="../../js/js-test-post.js"></script> 82 83 </body> 84 </html>