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<!DOCTYPE html>
<html>
  <head>
<meta charset="utf-8">
    <title>WebGL drawArrays Test</title>
    <link rel="stylesheet" href="../../resources/js-test-style.css"/>
    <script src="../../resources/js-test-pre.js"></script>
    <script src="../resources/webgl-test-utils.js"> </script>
    <script src="../../resources/desktop-gl-constants.js" type="text/javascript"></script>
</head>
<body>
<canvas id="example" width="50" height="50"></canvas>
<div id="description"></div>
<div id="console"></div>
    <script id="vshader" type="x-shader/x-vertex">
        attribute vec4 vPosition;
        void main()
        {
            gl_Position = vPosition;
        }
    </script>

    <script id="fshader" type="x-shader/x-fragment">
        void main()
        {
            gl_FragColor = vec4(1.0,0.0,0.0,1.0);
        }
    </script>

    <script>
        "use strict";
        function init()
        {
            description(document.title);

            function checkDrawArrays(mode, count, expect, msg) {
              gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
              gl.drawArrays(mode, 0, count);
              wtu.glErrorShouldBe(gl, expect, msg);
            }

            var wtu = WebGLTestUtils;
            var gl = wtu.create3DContext("example");
            var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);

            var vertexObject = gl.createBuffer();
            gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
            gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
            gl.enableVertexAttribArray(0);
            gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);

            checkDrawArrays(gl.TRIANGLES, 3,
                            gl.NO_ERROR, "can call gl.DrawArrays with gl.TRIANGLES");

            checkDrawArrays(
                desktopGL['QUAD_STRIP'], 4,
                gl.INVALID_ENUM, "gl.DrawArrays with QUAD_STRIP should return INVALID_ENUM");
            checkDrawArrays(
                desktopGL['QUADS'], 4,
                gl.INVALID_ENUM, "gl.DrawArrays with QUADS should return INVALID_ENUM");
            checkDrawArrays(
                desktopGL['POLYGON'], 4,
                gl.INVALID_ENUM, "gl.DrawArrays with POLYGON should return INVALID_ENUM");
       }

       init();
       var successfullyParsed = true;
    </script>
<script src="../../resources/js-test-post.js"></script>

</body>
</html>