mirror of
https://github.com/photonstorm/phaser
synced 2024-12-25 04:23:30 +00:00
74 lines
2.5 KiB
JavaScript
74 lines
2.5 KiB
JavaScript
var CanvasPool = require('./CanvasPool');
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var Smoothing = {
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/**
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* Gets the Smoothing Enabled vendor prefix being used on the given context, or null if not set.
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* iife
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*
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* @method Phaser.Canvas.getSmoothingPrefix
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* @param {CanvasRenderingContext2D} context - The context to enable or disable the image smoothing on.
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* @return {string|null} Returns the smoothingEnabled vendor prefix, or null if not set on the context.
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*/
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prefix: (function ()
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{
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var canvas = CanvasPool.create(this, 1, 1);
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var ctx = canvas.getContext('2d');
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var vendors = [ 'i', 'webkitI', 'msI', 'mozI', 'oI' ];
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vendors.forEach(function (vendor)
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{
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var s = vendor + 'mageSmoothingEnabled';
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if (s in ctx)
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{
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CanvasPool.remove(canvas);
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return s;
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}
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});
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CanvasPool.remove(canvas);
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return null;
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})(),
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/**
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* Sets the Image Smoothing property on the given context. Set to false to disable image smoothing.
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* By default browsers have image smoothing enabled, which isn't always what you visually want, especially
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* when using pixel art in a game. Note that this sets the property on the context itself, so that any image
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* drawn to the context will be affected. This sets the property across all current browsers but support is
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* patchy on earlier browsers, especially on mobile.
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*
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* @method Phaser.Canvas.setSmoothingEnabled
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* @param {CanvasRenderingContext2D} context - The context to enable or disable the image smoothing on.
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* @param {boolean} value - If set to true it will enable image smoothing, false will disable it.
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* @return {CanvasRenderingContext2D} Returns the source context.
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*/
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enable: function (context, value)
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{
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if (Smoothing.prefix)
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{
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context[Smoothing.prefix] = value;
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}
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return context;
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},
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/**
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* Returns `true` if the given context has image smoothing enabled, otherwise returns `false`.
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* Returns null if no smoothing prefix is available.
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*
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* @method Phaser.Canvas.getSmoothingEnabled
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* @param {CanvasRenderingContext2D} context - The context to check for smoothing on.
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* @return {boolean} True if the given context has image smoothing enabled, otherwise false.
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*/
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isEnabled: function (context)
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{
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return (Smoothing.prefix !== null) ? context[Smoothing.prefix] : null;
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}
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};
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module.exports = Smoothing();
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