null-uniform-location.html

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"use strict";

description("Tests calling the various uniform[Matrix]* APIs with a null uniform location");

var wtu = WebGLTestUtils;

var gl = wtu.create3DContext();

var program = wtu.loadStandardProgram(gl);

wtu.glErrorShouldBe(gl, gl.NO_ERROR);

shouldBeUndefined("gl.useProgram(program)");

var floatArray = new Float32Array([1, 2, 3, 4]);

var intArray = new Int32Array([1, 2, 3, 4]);

function callUniformFunction(name) {

  var isArrayVariant = (name.charAt(name.length - 1) == 'v');

  var isMatrix = (name.indexOf("Matrix") != -1);

  var isFloat =

      (name.charAt(name.length - 1) == 'f' ||

       name.charAt(name.length - 2) == 'f');

  var sizeIndex = (isArrayVariant ? name.length - 3 : name.length - 2);

  var size = parseInt(name.substring(sizeIndex, sizeIndex + 1));

  // Initialize argument list with null uniform location

  var args = [ null ];

  if (isArrayVariant) {

    // Call variant which takes values as array

    if (isMatrix) {

      size = size * size;

      args.push(false);

    var array = (isFloat ? new Float32Array(size) : new Int32Array(size));

    for (var i = 0; i < size; i++) {

      array[i] = i;

    args.push(array);

  } else {

    // Call variant which takes values as parameters

    for (var i = 0; i < size; i++) {

      args.push(i);

  var func = gl[name];

  return func.apply(gl, args);

var funcs = [ "uniform1f", "uniform1fv", "uniform1i", "uniform1iv",

              "uniform2f", "uniform2fv", "uniform2i", "uniform2iv",

              "uniform3f", "uniform3fv", "uniform3i", "uniform3iv",

              "uniform4f", "uniform4fv", "uniform4i", "uniform4iv",

              "uniformMatrix2fv", "uniformMatrix3fv", "uniformMatrix4fv" ];

var callString;

for (var i = 0; i < funcs.length; i++) {

  callString = "callUniformFunction('" + funcs[i] + "')";

  shouldBeUndefined(callString);

  wtu.glErrorShouldBe(gl, gl.NO_ERROR);

var successfullyParsed = true;

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