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boolean-argument-conversion.html (3166B)

      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 <script src="../../js/test-eval.js"></script>
     15 </head>
     16 <body>
     17 <div id="description"></div>
     18 <div id="console"></div>
     19 
     20 <script>
     21 "use strict";
     22 var wtu = WebGLTestUtils;
     23 description("Test that conversion of boolean arguments of WebGL functions follows EcmaScript 9.2. ToBoolean");
     24 debug("");
     25 debug("When an object is converted to a boolean, it should always evaluate as true. Any valueOf() method should not even get called. See Mozilla bug 727590 where Gecko incorrectly converted such an argument to a Number instead of a Boolean, giving the wrong behavior. See 9.2 and 9.3 in the EcmaScript specification.");
     26 debug("");
     27 var gl = wtu.create3DContext();
     28 var program = wtu.loadStandardProgram(gl);
     29 var shader = wtu.loadStandardVertexShader(gl);
     30 var shouldGenerateGLError = wtu.shouldGenerateGLError;
     31 
     32 assertMsg(program != null, "Program Compiled");
     33 assertMsg(shader != null, "Shader Compiled");
     34 
     35 var uloc = gl.getUniformLocation(program, "u_modelViewProjMatrix");
     36 var aloc = gl.getAttribLocation(program, "a_vertex");
     37 
     38 gl.bindBuffer(gl.ARRAY_BUFFER, gl.createBuffer());
     39 
     40 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from initialization.");
     41 assertMsg(uloc, "Uniform not found");
     42 assertMsg(aloc >= 0, "Attribute not found");
     43 
     44 var boolArg = { valueOf: function() { throw "Converting an Object to a Boolean should just give 'true' without further evaluation"; } }
     45 
     46 function shouldNotThrowWithBoolArgs(code) {
     47  try {
     48    TestEval(code);
     49  } catch(e) {
     50    testFailed(code + " threw exception: " + e);
     51    return;
     52  }
     53  testPassed(code + " converted its boolean arguments correctly");
     54 }
     55 
     56 shouldNotThrowWithBoolArgs(
     57  "gl.colorMask(boolArg, boolArg, boolArg, boolArg)"
     58 );
     59 
     60 shouldNotThrowWithBoolArgs(
     61  "gl.depthMask(boolArg)"
     62 );
     63 
     64 shouldNotThrowWithBoolArgs(
     65  "gl.sampleCoverage(1, boolArg)"
     66 );
     67 
     68 function zeroArray(length) {
     69  var a = new Array(length);
     70  for (var i = 0; i < length; i++)
     71    a[i] = 0;
     72  return a;
     73 }
     74 
     75 function zeroFloat32Array(length) {
     76  var a = new Float32Array(length);
     77  for (var i = 0; i < length; i++)
     78    a[i] = 0;
     79  return a;
     80 }
     81 
     82 shouldNotThrowWithBoolArgs(
     83  "gl.uniformMatrix2fv(uloc, boolArg, zeroFloat32Array(4))"
     84 );
     85 
     86 shouldNotThrowWithBoolArgs(
     87  "gl.uniformMatrix2fv(uloc, boolArg, zeroArray(4))"
     88 );
     89 
     90 shouldNotThrowWithBoolArgs(
     91  "gl.uniformMatrix3fv(uloc, boolArg, zeroFloat32Array(9))"
     92 );
     93 
     94 shouldNotThrowWithBoolArgs(
     95  "gl.uniformMatrix3fv(uloc, boolArg, zeroArray(9))"
     96 );
     97 
     98 shouldNotThrowWithBoolArgs(
     99  "gl.uniformMatrix4fv(uloc, boolArg, zeroFloat32Array(16))"
    100 );
    101 
    102 shouldNotThrowWithBoolArgs(
    103  "gl.uniformMatrix4fv(uloc, boolArg, zeroArray(16))"
    104 );
    105 
    106 shouldNotThrowWithBoolArgs(
    107  "gl.vertexAttribPointer(aloc, 4, gl.FLOAT, boolArg, 4, 0)"
    108 );
    109 
    110 var successfullyParsed = true;
    111 </script>
    112 
    113 <script src="../../js/js-test-post.js"></script>
    114 </body>
    115 </html>