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stats.js
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/**
* @author mrdoob / http://mrdoob.com/
*/
var Stats = function () {
var mode = 0;
var container = document.createElement( 'div' );
container.style.cssText = 'position:fixed;top:0;left:0;cursor:pointer;opacity:0.9;z-index:10000';
container.addEventListener( 'click', function ( event ) {
event.preventDefault();
showPanel( ++ mode % container.children.length );
}, false );
//
function addPanel( panel ) {
container.appendChild( panel.dom );
return panel;
}
function showPanel( id ) {
for ( var i = 0; i < container.children.length; i ++ ) {
container.children[ i ].style.display = i === id ? 'block' : 'none';
}
mode = id;
}
//
var beginTime = ( performance || Date ).now(), prevTime = beginTime, frames = 0;
var fpsPanel = addPanel( new Stats.Panel( 'FPS', '#0ff', '#002' ) );
var msPanel = addPanel( new Stats.Panel( 'MS', '#0f0', '#020' ) );
if ( self.performance && self.performance.memory ) {
var memPanel = addPanel( new Stats.Panel( 'MB', '#f08', '#201' ) );
}
showPanel( 0 );
return {
REVISION: 16,
dom: container,
addPanel: addPanel,
showPanel: showPanel,
begin: function () {
beginTime = ( performance || Date ).now();
},
end: function () {
frames ++;
var time = ( performance || Date ).now();
msPanel.update( time - beginTime, 200 );
if ( time > prevTime + 1000 ) {
fpsPanel.update( ( frames * 1000 ) / ( time - prevTime ), 100 );
prevTime = time;
frames = 0;
if ( memPanel ) {
var memory = performance.memory;
memPanel.update( memory.usedJSHeapSize / 1048576, memory.jsHeapSizeLimit / 1048576 );
}
}
return time;
},
update: function () {
beginTime = this.end();
},
// Backwards Compatibility
domElement: container,
setMode: showPanel
};
};
Stats.Panel = function ( name, fg, bg ) {
var min = Infinity, max = 0, round = Math.round;
var PR = round( window.devicePixelRatio || 1 );
var WIDTH = 80 * PR, HEIGHT = 48 * PR,
TEXT_X = 3 * PR, TEXT_Y = 2 * PR,
GRAPH_X = 3 * PR, GRAPH_Y = 15 * PR,
GRAPH_WIDTH = 74 * PR, GRAPH_HEIGHT = 30 * PR;
var canvas = document.createElement( 'canvas' );
canvas.width = WIDTH;
canvas.height = HEIGHT;
canvas.style.cssText = 'width:80px;height:48px';
var context = canvas.getContext( '2d' );
context.font = 'bold ' + ( 9 * PR ) + 'px Helvetica,Arial,sans-serif';
context.textBaseline = 'top';
context.fillStyle = bg;
context.fillRect( 0, 0, WIDTH, HEIGHT );
context.fillStyle = fg;
context.fillText( name, TEXT_X, TEXT_Y );
context.fillRect( GRAPH_X, GRAPH_Y, GRAPH_WIDTH, GRAPH_HEIGHT );
context.fillStyle = bg;
context.globalAlpha = 0.9;
context.fillRect( GRAPH_X, GRAPH_Y, GRAPH_WIDTH, GRAPH_HEIGHT );
return {
dom: canvas,
update: function ( value, maxValue ) {
min = Math.min( min, value );
max = Math.max( max, value );
context.fillStyle = bg;
context.globalAlpha = 1;
context.fillRect( 0, 0, WIDTH, GRAPH_Y );
context.fillStyle = fg;
context.fillText( round( value ) + ' ' + name + ' (' + round( min ) + '-' + round( max ) + ')', TEXT_X, TEXT_Y );
context.drawImage( canvas, GRAPH_X + PR, GRAPH_Y, GRAPH_WIDTH - PR, GRAPH_HEIGHT, GRAPH_X, GRAPH_Y, GRAPH_WIDTH - PR, GRAPH_HEIGHT );
context.fillRect( GRAPH_X + GRAPH_WIDTH - PR, GRAPH_Y, PR, GRAPH_HEIGHT );
context.fillStyle = bg;
context.globalAlpha = 0.9;
context.fillRect( GRAPH_X + GRAPH_WIDTH - PR, GRAPH_Y, PR, round( ( 1 - ( value / maxValue ) ) * GRAPH_HEIGHT ) );
}
};
};
if ( typeof module === 'object' ) {
module.exports = Stats;
}