/lenasys/0.1

//----------------------------------------------------------

// helper Globals

//----------------------------------------------------------		

var shaderProgram;

var gl;

var fps = 0;

var fpsmax = 0;

var timecount = 0;

var fpssum = 0;

var fpscount = 1;

var benchtime = 0;

var username = "";

//----------------------------------------------------------

// getShader collects shader and compiles it. Errors are printed in alert

//----------------------------------------------------------		

function getShader(gl, id) {

	var shaderScript = document.getElementById(id);

	if (!shaderScript) {

		return null;

	}

	var str = "";

	var k = shaderScript.firstChild;

	while (k) {

		if (k.nodeType == 3) {

			str += k.textContent;

		}

		k = k.nextSibling;

	}

	var shader;

	if (shaderScript.type == "x-shader/x-fragment") {

		shader = gl.createShader(gl.FRAGMENT_SHADER);

	} else if (shaderScript.type == "x-shader/x-vertex") {

		shader = gl.createShader(gl.VERTEX_SHADER);

	} else {

		return null;

	}

	gl.shaderSource(shader, str);

	gl.compileShader(shader);

	if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {

		alert(gl.getShaderInfoLog(shader));

		return null;

	}

	return shader;

}

//----------------------------------------------------------

// Matrix stack variables

//----------------------------------------------------------		

var mvMatrix = mat4.create();

var mvMatrixStack = [];

var pMatrix = mat4.create();

//----------------------------------------------------------

// Push Matrix

//----------------------------------------------------------		

function mvPushMatrix() {

	var copy = mat4.create();

	mat4.set(mvMatrix, copy);

	mvMatrixStack.push(copy);

}

//----------------------------------------------------------

// Pop Matrix

//----------------------------------------------------------		

function mvPopMatrix() {

	if (mvMatrixStack.length == 0) {

		throw "Invalid popMatrix!";

	}

	mvMatrix = mvMatrixStack.pop();

}

//----------------------------------------------------------

// Startup webGL and alert if not available

//----------------------------------------------------------		

function initGL(canvas) {

	try {

		gl = canvas.getContext("experimental-webgl");

		gl.viewportWidth = canvas.width;

		gl.viewportHeight = canvas.height;

	} catch (e) {

	} 

	if (!gl) {

		alert("Could not initialise WebGL, sorry :-(");

	}

}

//----------------------------------------------------------

// Measure fps and update div if available

//----------------------------------------------------------		

function updatefps(elapsed,fpsdiv) {

	if(!isNaN(elapsed)) {

		timecount += (elapsed / 1000.0);

		fpssum += (elapsed / 10.0);											

	} 

	if(elapsed < 1) {

		elapsed = 1;

	} 

	fpscount++;

	fps = Math.round((100.0 / (fpssum / fpscount)) * 10.0) / 10.0;

	if(fps > fpsmax&&timecount > 5.0) {

		fpsmax = fps;

	}

	fpsd = document.getElementById(fpsdiv);

	if(fpsd != null) {

		fpsd.innerHTML = fps;

	}

}

//----------------------------------------------------------

// Sends benchmark every X seconds

//----------------------------------------------------------		

function sendbenchmark(delay,app) {

	// Every 8 seconds send benchmark data to server!

	if(Math.abs(timecount - benchtime) > delay) {

		benchtime = timecount;

		benchmark(username, app, fps, fpsmax, Math.round(timecount * 10.0) / 10.0);

	}                                                                                                                                                   		

}

//----------------------------------------------------------

// Generate benchmark userID

//----------------------------------------------------------		

function genID(app) {                                                                                                                                            

	username = localStorage.getItem("Benchuser"); //Try to fetch username data                                                             

	if (username == null || username == "") {

		var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

		text = "";

		for(var i = 0; i < 16; i++) {

			text += possible.charAt(Math.floor(Math.random() * possible.length));

		}

		username =  text;

		localStorage.setItem("Benchuser", username);

	}

	benchmark(username, app, fps, fpsmax, Math.round(timecount * 10.0) / 10.0);                                                                                                                                    

}                                                                                                                                            

//----------------------------------------------------------

// Send benchmark using httpajax.js

//----------------------------------------------------------		

function benchmark(username, app, fps, maxfps, runtime) {

	var paramstr = 'User=' + escape(username);

	paramstr += "&App=" + escape(app);

	paramstr += "&Fps=" + escape(fps);		

	paramstr += "&MaxFps=" + escape(maxfps);		

	paramstr += "&RunTime=" + escape(runtime);

	AjaxService("Benchy.php", paramstr);				

}