dom/canvas/test/webgl-conf/checkout/conformance/buffers/index-validation-verifies-too-many-indices.html

   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>