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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL Viewport Test</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
</head>
<body>
<canvas id="canvas1" width="128" height="128"> </canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description();
var wtu = WebGLTestUtils;

function test(canvas, attribs) {
  var gl = wtu.create3DContext(canvas, attribs);

  if (!gl) {
    testFailed("context does not exist");
  } else {
    testPassed("context exists");

    var program = wtu.setupColorQuad(gl);
    var w = gl.canvas.width;
    var h = gl.canvas.height;

    gl.viewport(0, 0, w/2, h/2);

    wtu.drawFloatColorQuad(gl, [1.0, 0.0, 0.0, 1.0]);

    debug("");
    wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors");
  }
}

test(document.getElementById("canvas1"), {antialias: false});

debug("");
var successfullyParsed = true;

</script>
<script src="../../js/js-test-post.js"></script>

</body>
</html>