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stats.js
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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:90000';
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));
}
};
};
// export { Stats as default };