/*
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
*/

// This test relies on the surrounding web page defining a variable
// "contextVersion" which indicates what version of WebGL it's running
// on -- 1 for WebGL 1.0, 2 for WebGL 2.0, etc.

"use strict";
var wtu = WebGLTestUtils;
description(document.title);
debug("Tests that instanceof works on WebGL objects.");
debug("");

function checkGLError(message) {
  var error = gl.getError();
  if (error != gl.NO_ERROR) {
    wtu.error("Error: " + message + " caused " + wtu.glEnumToString(gl, error));
  }
}

var gl = wtu.create3DContext("canvas", undefined, contextVersion);
if (contextVersion === 1) {
  shouldBeTrue('gl instanceof WebGLRenderingContext');
} else if (contextVersion === 2) {
  shouldBeTrue('gl instanceof WebGL2RenderingContext');
}

shouldBeTrue('gl.createBuffer() instanceof WebGLBuffer');
checkGLError("createBuffer")

shouldBeTrue('gl.createFramebuffer() instanceof WebGLFramebuffer');
checkGLError("createFramebuffer")

shouldBeTrue('gl.createProgram() instanceof WebGLProgram');
checkGLError("createProgram")

shouldBeTrue('gl.createRenderbuffer() instanceof WebGLRenderbuffer');
checkGLError("createRenderbuffer")

shouldBeTrue('gl.createShader(gl.VERTEX_SHADER) instanceof WebGLShader');
checkGLError("createShader")

shouldBeTrue('gl.createTexture() instanceof WebGLTexture');
checkGLError("createTexture")

if (contextVersion > 1) {
  shouldBeTrue('gl.createQuery() instanceof WebGLQuery');
  checkGLError("createQuery")

  shouldBeTrue('gl.createSampler() instanceof WebGLSampler');
  checkGLError("createSampler")

  shouldBeTrue('gl.createTransformFeedback() instanceof WebGLTransformFeedback');
  checkGLError("createTransformFeedback")

  shouldBeTrue('gl.createVertexArray() instanceof WebGLVertexArrayObject');
  checkGLError("createVertexArray")
}

var program = wtu.setupProgram(gl, ['vshader', 'fshader'], ['vPosition'], [0]);

shouldBeTrue('gl.getUniformLocation(program, "color") instanceof WebGLUniformLocation');
checkGLError("getUniformLocation")

shouldBeTrue('gl.getActiveAttrib(program, 0) instanceof WebGLActiveInfo');
checkGLError("getActiveAttrib")

shouldBeTrue('gl.getActiveUniform(program, 0) instanceof WebGLActiveInfo');
checkGLError("getActiveUniform")

debug("");
debug("Tests that those WebGL objects can not be constructed through new operator");
debug("");

function shouldThrowWithNew(objectType, objectName) {
  try {
    new objectType;
    testFailed('new ' + objectName + ' did not throw');
  } catch (e) {
    testPassed('new ' + objectName + ' threw an error');
  }
}

shouldThrowWithNew(window.WebGLRenderingContext, 'WebGLRenderingContext');
shouldThrowWithNew(window.WebGLActiveInfo, 'WebGLActiveInfo');
shouldThrowWithNew(window.WebGLBuffer, 'WebGLBuffer');
shouldThrowWithNew(window.WebGLFramebuffer, 'WebGLFramebuffer');
shouldThrowWithNew(window.WebGLProgram, 'WebGLProgram');
shouldThrowWithNew(window.WebGLRenderbuffer, 'WebGLRenderbuffer');
shouldThrowWithNew(window.WebGLShader, 'WebGLShader');
shouldThrowWithNew(window.WebGLTexture, 'WebGLTexture');
shouldThrowWithNew(window.WebGLUniformLocation, 'WebGLUniformLocation');
shouldThrowWithNew(window.WebGLShaderPrecisionFormat, 'WebGLShaderPrecisionFormat');
if (contextVersion > 1) {
  shouldThrowWithNew(window.WebGLQuery, 'WebGLQuery');
  shouldThrowWithNew(window.WebGLSampler, 'WebGLSampler');
  shouldThrowWithNew(window.WebGLSync, 'WebGLSync');
  shouldThrowWithNew(window.WebGLTransformFeedback, 'WebGLTransformFeedback');
  shouldThrowWithNew(window.WebGLVertexArrayObject, 'WebGLVertexArrayObject');
}

var successfullyParsed = true;