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‎README.md‎

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@@ -5,23 +5,27 @@ stats.js
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[![Flattr this](http://api.flattr.com/button/button-compact-static-100x17.png)](http://flattr.com/thing/1993/stats-js)
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![stats_js.png](http://github.com/mrdoob/stats.js/raw/master/assets/stats_js.png)
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This class provides a simple info box that will help you monitor your code performance.
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* **FPS** Frames per second, how many frames were rendered in 1 second. The higher the number, the better.
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* **FPS** Frames per second, how many frames were rendered in 1 second. The higher the number the better.
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* **MS** Milliseconds needed to render a frame. The lower the number the better.
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### Screenshots ###
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![stats_js.png](http://github.com/mrdoob/stats.js/raw/master/assets/stats_js.png)
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### How to use ###
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### Usage ###
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var stats = new Stats();
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parentElement.appendChild(stats.domElement);
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setInterval(function () {
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stats.update();
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}, 1000/60);
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Aligning the panel on the top-left corner can be done like this:
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Aligning the panel to the top-left corner:
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var stats = new Stats();
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stats.domElement.style.position = 'absolute';
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parentElement.appendChild(stats.domElement);
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setInterval(function () {
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stats.update();
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}, 1000/60);
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### Change Log ###
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2010 06 11 - **r4** (2.235 kb)
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* Added MS view (click to swap views)
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2010 05 12 - **r3** (1.241 kb)
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* Switched to module pattern code style.

‎build/stats.js‎

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‎src/stats.js‎

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/*
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* stats.js r3
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* stats.js r4
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* http://github.com/mrdoob/stats.js
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*
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* Released under MIT license:
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* var stats = new Stats();
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* parentElement.appendChild(stats.domElement);
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*
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* setInterval(loop, 1000/60);
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* setInterval(function () {
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*
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* function loop() {
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* stats.update();
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* }
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* stats.update();
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*
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* }, 1000/60);
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*
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*/
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var Stats = function () {
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var _frames, _framesMin, _framesMax, _time, _timePrev,
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_container, _text, _canvas, _context, _imageData;
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_frames = 0;
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_framesMin = 1000;
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_framesMax = 0;
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_time = new Date().getTime();
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_timePrev = _time;
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_container = document.createElement('div');
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var _container, _mode = 'fps',
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_frames = 0, _time = new Date().getTime(), _timeLastFrame = _time, _timeLastSecond = _time,
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_fps = 0, _fpsMin = 1000, _fpsMax = 0, _fpsText, _fpsCanvas, _fpsContext, _fpsImageData,
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_ms = 0, _msMin = 1000, _msMax = 0, _msText, _msCanvas, _msContext, _msImageData;
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_container = document.createElement( 'div' );
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_container.style.fontFamily = 'Helvetica, Arial, sans-serif';
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_container.style.fontSize = '9px';
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_container.style.backgroundColor = '#000020';
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_container.style.opacity = '0.9';
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_container.style.width = '80px';
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_container.style.paddingTop = '2px';
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_text = document.createElement('div');
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_text.style.color = '#00ffff';
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_text.style.marginLeft = '3px';
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_text.style.marginBottom = '3px';
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_text.innerHTML = '<strong>FPS</strong>';
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_container.appendChild(_text);
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_canvas = document.createElement('canvas');
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_canvas.width = 74;
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_canvas.height = 30;
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_canvas.style.display = 'block';
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_canvas.style.marginLeft = '3px';
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_canvas.style.marginBottom = '3px';
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_container.appendChild(_canvas);
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_context = _canvas.getContext('2d');
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_context.fillStyle = '#101030';
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_context.fillRect(0, 0, _canvas.width, _canvas.height);
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_imageData = _context.getImageData(0, 0, _canvas.width, _canvas.height);
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_container.style.cursor = 'pointer';
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_container.addEventListener( 'click', swapMode, false );
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_fpsText = document.createElement( 'div' );
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_fpsText.innerHTML = '<strong>FPS</strong>';
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_fpsText.style.color = '#00ffff';
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_fpsText.style.marginLeft = '3px';
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_fpsText.style.marginBottom = '3px';
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_container.appendChild(_fpsText);
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_fpsCanvas = document.createElement( 'canvas' );
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_fpsCanvas.width = 74;
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_fpsCanvas.height = 30;
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_fpsCanvas.style.display = 'block';
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_fpsCanvas.style.marginLeft = '3px';
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_fpsCanvas.style.marginBottom = '3px';
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_container.appendChild(_fpsCanvas);
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_fpsContext = _fpsCanvas.getContext( '2d' );
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_fpsContext.fillStyle = '#101030';
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_fpsContext.fillRect(0, 0, _fpsCanvas.width, _fpsCanvas.height);
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_fpsImageData = _fpsContext.getImageData( 0, 0, _fpsCanvas.width, _fpsCanvas.height );
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_msText = document.createElement( 'div' );
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_msText.innerHTML = '<strong>MS</strong>';
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_msText.style.color = '#00ffff';
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_msText.style.marginLeft = '3px';
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_msText.style.marginBottom = '3px';
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_msText.style.display = 'none';
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_container.appendChild(_msText);
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_msCanvas = document.createElement( 'canvas' );
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_msCanvas.width = 74;
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_msCanvas.height = 30;
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_msCanvas.style.display = 'block';
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_msCanvas.style.marginLeft = '3px';
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_msCanvas.style.marginBottom = '3px';
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_msCanvas.style.display = 'none';
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_container.appendChild(_msCanvas);
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_msContext = _msCanvas.getContext( '2d' );
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_msContext.fillStyle = '#101030';
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_msContext.fillRect(0, 0, _msCanvas.width, _msCanvas.height);
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_msImageData = _msContext.getImageData( 0, 0, _msCanvas.width, _msCanvas.height );
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function updateGraph( data, value ) {
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var x, y, index;
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for ( y = 0; y < 30; y++ ) {
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for ( x = 0; x < 73; x++ ) {
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index = (x + y * 74) * 4;
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data[ index ] = data[ index + 4 ];
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data[ index + 1 ] = data[ index + 5 ];
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data[ index + 2 ] = data[ index + 6 ];
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}
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}
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for ( y = 0; y < 30; y++ ) {
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index = (73 + y * 74) * 4;
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if ( y < value ) {
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data[ index ] = 16;
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data[ index + 1 ] = 16;
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data[ index + 2 ] = 48;
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} else {
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data[ index ] = 0;
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data[ index + 1 ] = 255;
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data[ index + 2 ] = 255;
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}
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}
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}
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function swapMode() {
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switch( _mode ) {
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case 'fps':
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_mode = 'ms';
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_fpsText.style.display = 'none';
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_fpsCanvas.style.display = 'none';
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_msText.style.display = 'inline';
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_msCanvas.style.display = 'inline';
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break;
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case 'ms':
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_mode = 'fps';
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_fpsText.style.display = 'inline';
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_fpsCanvas.style.display = 'inline';
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_msText.style.display = 'none';
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_msCanvas.style.display = 'none';
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break;
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}
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}
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return {
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domElement: _container,
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update: function () {
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var fps, index;
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_frames ++;
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_time = new Date().getTime();
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_frames += 1;
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if (_time >= _timePrev + 1000) {
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fps = Math.round((_frames * 1000) / (_time - _timePrev));
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_framesMin = Math.min(_framesMin, fps);
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_framesMax = Math.max(_framesMax, fps);
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_text.innerHTML = '<strong>' + fps + ' FPS</strong> (' + _framesMin + '-' + _framesMax + ')';
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_imageData = _context.getImageData(1, 0, _canvas.width - 1, 30);
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_context.putImageData(_imageData, 0, 0);
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_context.fillStyle = '#101030';
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_context.fillRect(_canvas.width - 1, 0, 1, 30);
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index = Math.floor(30 - Math.min(30, (fps / 60) * 30));
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_context.fillStyle = '#80ffff';
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_context.fillRect(_canvas.width - 1, index, 1, 1);
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_context.fillStyle = '#00ffff';
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_context.fillRect(_canvas.width - 1, index + 1, 1, 30 - index);
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_timePrev = _time;
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_ms = _time - _timeLastFrame;
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_msMin = Math.min(_msMin, _ms);
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_msMax = Math.max(_msMax, _ms);
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updateGraph( _msImageData.data, Math.min( 30, 30 - ( _ms / 200 ) * 30 ) );
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_msText.innerHTML = '<strong>' + _ms + ' MS</strong> (' + _msMin + '-' + _msMax + ')';
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_msContext.putImageData( _msImageData, 0, 0 );
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_timeLastFrame = _time;
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if ( _time > _timeLastSecond + 1000 ) {
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_fps = Math.round((_frames * 1000) / (_time - _timeLastSecond));
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_fpsMin = Math.min(_fpsMin, _fps);
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_fpsMax = Math.max(_fpsMax, _fps);
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updateGraph( _fpsImageData.data, Math.min( 30, 30 - ( _fps / 100 ) * 30 ) );
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_fpsText.innerHTML = '<strong>' + _fps + ' FPS</strong> (' + _fpsMin + '-' + _fpsMax + ')';
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_fpsContext.putImageData( _fpsImageData, 0, 0 );
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_timeLastSecond = _time;
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_frames = 0;
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}
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}
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};
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};

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