gl-drawelements.html (3941B)
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 drawElements Test</title> 12 <link rel="stylesheet" href="../../resources/js-test-style.css"/> 13 <script src="../../js/desktop-gl-constants.js"></script> 14 <script src="../../js/js-test-pre.js"></script> 15 <script src="../../js/webgl-test-utils.js"> </script> 16 </head> 17 <body> 18 <canvas id="example" width="50" height="50"></canvas> 19 <div id="description"></div> 20 <div id="console"></div> 21 <script id="vshader" type="x-shader/x-vertex"> 22 attribute vec4 vPosition; 23 void main() 24 { 25 gl_Position = vPosition; 26 } 27 </script> 28 29 <script id="fshader" type="x-shader/x-fragment"> 30 void main() 31 { 32 gl_FragColor = vec4(1.0,0.0,0.0,1.0); 33 } 34 </script> 35 36 <script>"use strict"; 37 description(document.title); 38 39 var wtu = WebGLTestUtils; 40 var gl = wtu.create3DContext("example"); 41 var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]); 42 43 gl.bindBuffer(gl.ARRAY_BUFFER, gl.createBuffer()); 44 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW); 45 gl.enableVertexAttribArray(0); 46 gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); 47 48 gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.createBuffer()); 49 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array([ 0, 1, 2]), gl.STATIC_DRAW); 50 wtu.shouldGenerateGLError(gl, gl.NO_ERROR, 51 "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)"); 52 53 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint8Array([ 0, 1, 2, 0]), gl.STATIC_DRAW); 54 wtu.shouldGenerateGLError(gl, gl.NO_ERROR, 55 "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_BYTE, 0)"); 56 57 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, 58 "gl.drawElements(desktopGL.QUAD_STRIP, 4, gl.UNSIGNED_BYTE, 0)"); 59 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, 60 "gl.drawElements(desktopGL.QUADS, 4, gl.UNSIGNED_BYTE, 0)"); 61 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, 62 "gl.drawElements(desktopGL.POLYGON, 4, gl.UNSIGNED_BYTE, 0)"); 63 64 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint32Array([ 0, 1, 2]), gl.STATIC_DRAW); 65 66 wtu.shouldGenerateGLError(gl, 67 wtu.getDefault3DContextVersion() > 1 ? gl.NO_ERROR : gl.INVALID_ENUM, 68 "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_INT, 0)"); 69 70 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, 71 "gl.drawElements(gl.TRIANGLES, 3, gl.FLOAT, 0)"); 72 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, 73 "gl.drawElements(gl.TRIANGLES, 3, gl.SHORT, 0)"); 74 75 // Index validation 76 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array([0,1,2,2000, 40802, 5887992]), gl.STATIC_DRAW); 77 wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, 78 "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 1)"); 79 wtu.shouldGenerateGLError(gl, gl.NO_ERROR, 80 "gl.drawElements(gl.TRIANGLES, 2, gl.UNSIGNED_SHORT, 2)"); 81 var indexValidationError = wtu.shouldGenerateGLError(gl, [gl.INVALID_OPERATION, gl.NO_ERROR], 82 "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 2)"); 83 wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, 84 "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 3)"); 85 wtu.shouldGenerateGLError(gl, indexValidationError, 86 "gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0)"); 87 wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, 88 "gl.drawElements(gl.TRIANGLES, 7, gl.UNSIGNED_SHORT, 0)"); 89 wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, 90 "gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 2)"); 91 92 var successfullyParsed = true; 93 </script> 94 <script src="../../js/js-test-post.js"></script> 95 96 </body> 97 </html>