/*
 * Pixastic - JavaScript Image Processing Library
 * Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
 * MIT License [http://www.pixastic.com/lib/license.txt]
 */


Pixastic.Actions.desaturate={process:function(params){var useAverage=!!(params.options.average&&params.options.average!="false");if(Pixastic.Client.hasCanvasImageData()){var data=Pixastic.prepareData(params);var rect=params.options.rect;var w=rect.width;var h=rect.height;var p=w*h;var pix=p*4,pix1,pix2;if(useAverage){while(p--)
data[pix-=4]=data[pix1=pix+1]=data[pix2=pix+2]=(data[pix]+data[pix1]+data[pix2])/3}else{while(p--)
data[pix-=4]=data[pix1=pix+1]=data[pix2=pix+2]=(data[pix]*0.3+data[pix1]*0.59+data[pix2]*0.11);}
return true;}else if(Pixastic.Client.isIE()){params.image.style.filter+=" gray";return true;}},checkSupport:function(){return(Pixastic.Client.hasCanvasImageData()||Pixastic.Client.isIE());}}