index-validation-verifies-too-many-indices.html (1879B)
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 </head> 15 <body> 16 <div id="description"></div> 17 <div id="console"></div> 18 19 <script> 20 "use strict"; 21 description('Tests that index validation for drawElements does not examine too many indices'); 22 23 var wtu = WebGLTestUtils; 24 var context = wtu.create3DContext(); 25 var program = wtu.loadStandardProgram(context); 26 27 context.useProgram(program); 28 var vertexObject = context.createBuffer(); 29 context.enableVertexAttribArray(0); 30 context.bindBuffer(context.ARRAY_BUFFER, vertexObject); 31 // 4 vertices -> 2 triangles 32 context.bufferData(context.ARRAY_BUFFER, new Float32Array([ 0,0,0, 0,1,0, 1,0,0, 1,1,0 ]), context.STATIC_DRAW); 33 context.vertexAttribPointer(0, 3, context.FLOAT, false, 0, 0); 34 35 var indexObject = context.createBuffer(); 36 37 debug("Test out of range indices") 38 context.bindBuffer(context.ELEMENT_ARRAY_BUFFER, indexObject); 39 context.bufferData(context.ELEMENT_ARRAY_BUFFER, new Uint16Array([ 10000, 0, 1, 2, 3, 10000 ]), context.STATIC_DRAW); 40 var indexValidationError = wtu.shouldGenerateGLError(context, [context.INVALID_OPERATION, context.NO_ERROR], "context.drawElements(context.TRIANGLE_STRIP, 4, context.UNSIGNED_SHORT, 0)"); 41 wtu.shouldGenerateGLError(context, context.NO_ERROR, "context.drawElements(context.TRIANGLE_STRIP, 4, context.UNSIGNED_SHORT, 2)"); 42 wtu.shouldGenerateGLError(context, indexValidationError, "context.drawElements(context.TRIANGLE_STRIP, 4, context.UNSIGNED_SHORT, 4)"); 43 44 debug("") 45 var successfullyParsed = true; 46 </script> 47 48 <script src="../../js/js-test-post.js"></script> 49 </body> 50 </html>