<!DOCTYPE html>
<html style="margin: 0; padding: 0;">
  <head>
<meta charset="utf-8">
    <title>Simple WebGL context</title>
    <script src="webgl-test-utils.js"> </script>
</head>
<body style="margin: 0; padding: 0; overflow: hidden;">
    <canvas id="c"
        width="1680" height="1050"
        style="width: 256px; height: 256px;"> <!-- scaled to fit page better -->
    <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>
        var wtu = WebGLTestUtils;

        var gl = wtu.create3DContext("c", {"antialiased": false});
        program = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);

        var vertexObject = gl.createBuffer();
        gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
        gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.75,0, -0.75,-0.75,0, 0.75,-0.75,0 ]), gl.STATIC_DRAW);
        gl.enableVertexAttribArray(0);
        gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);

        gl.clearColor(0.0, 0.0, 0.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
        gl.drawArrays(gl.TRIANGLES, 0, 3);

        if(parent) {
            window.glContext = gl;
            parent.postMessage("Ready", "*");
        }
    </script>
</body>
</html>