burning-words.min.js

function BurningWords(text,args){function BurningWords_Start(){var dc=self.canvas.getContext("2d");var width_rgba=(self.canvas.width*4);var image_data_len=width_rgba*self.canvas.height;for(var pos=0;pos<image_data_len;pos+=4){if(self.image_src.data[pos]==255){self.image_flame.data[pos]=Math.floor(Math.random()*256);}}for(pos=0;pos<(image_data_len-width_rgba);pos+=4){var x=pos%width_rgba;var l=self.image_flame.data[((x===0)?pos+width_rgba:pos)-4];var r=self.image_flame.data[((x==width_rgba-4)?pos-width_rgba:pos)+4];var b=self.image_flame.data[pos+width_rgba];var avg=Math.floor((l+r+b+b)/4-self.fire_decay);if(avg<0){avg=0;}self.image_flame.data[pos]=avg;}for(pos=0;pos<image_data_len;pos+=4){if(self.image_flame.data[pos]>self.smoke_threshold){var c=self.image_flame.data[pos];var pal=self.palette;var a=1-pal[c][3]/255;if(a<0){a=0;}if(a>self.bg_color_a){a=self.bg_color_a;}self.image.data[pos]=Math.min(255,pal[c][0]+Math.floor(self.bg_color_r*a));self.image.data[pos+1]=Math.min(255,pal[c][1]+Math.floor(self.bg_color_g*a));self.image.data[pos+2]=Math.min(255,pal[c][2]+Math.floor(self.bg_color_b*a));self.image.data[pos+3]=Math.max(self.bg_color_a,pal[c][3]);}else{self.image.data[pos]=self.bg_color_r;self.image.data[pos+1]=self.bg_color_g;self.image.data[pos+2]=self.bg_color_b;self.image.data[pos+3]=self.bg_color_a;}}dc.putImageData(self.image,0,0);dc.fillStyle=self.text_color_string;dc.font=self.font_string;dc.textAlign="center";dc.textBaseline="bottom";dc.fillText(self.text,self.canvas.width/2,self.canvas.height);}var self={};self.interval_id=null;self.canvas=null;if(typeof args!=="object"){args={};}self.args=args||{};self.args.text_color=args.text_color||"FFFFCC";self.args.font=args.font||"Times New Roman";self.args.font_size=args.font_size||30;self.args.bg_color=args.bg_color||"FFFFFF";self.args.bg_alpha=args.bg_alpha||0;self.args.speed=args.speed||"normal";self.args.id=args.id||"";self.smoke_threshold=50;self.palette=[];for(var i=0;i<256;i++){if(i>128){self.palette[i]=[255,255,255,255];}else{if(i>110){self.palette[i]=[233,242,63,255];}else{if(i>92){self.palette[i]=[214,102,28,255];}else{if(i>77){self.palette[i]=[90,0,0,2*i];}else{self.palette[i]=[0,0,0,3*((i<self.smoke_threshold)?0:(i-self.smoke_threshold))];}}}}}self.font_string=self.args.font_size+"px "+self.args.font;self.text=text||"burning-words.js";self.text_color_string="rgb("+parseInt(self.args.text_color.substring(0,2),16)+","+parseInt(self.args.text_color.substring(2,4),16)+","+parseInt(self.args.text_color.substring(4,6),16)+")";self.bg_color_r=parseInt(self.args.bg_color.substring(0,2),16);self.bg_color_g=parseInt(self.args.bg_color.substring(2,4),16);self.bg_color_b=parseInt(self.args.bg_color.substring(4,6),16);self.bg_color_a=Math.floor(255*self.args.bg_alpha/100);self.bg_color_a_pct=self.args.bg_alpha/100;self.bg_color_string="rgba("+self.bg_color_r+","+self.bg_color_g+","+self.bg_color_b+","+self.bg_alpha+")";var speed_msec;if(self.args.speed&&!isNaN(Number(self.args.speed))&&self.args.speed.toString().match(/^\s+$/)===null){speed_msec=self.args.speed;}else{switch(self.args.speed){case"x-fast":speed_msec=10;break;case"fast":speed_msec=25;break;case"slow":speed_msec=100;break;case"x-slow":speed_msec=150;break;case"normal":speed_msec=50;break;default:speed_msec=50;break;}}if(!self.args.id||!document.getElementById(self.args.id)){var counter=1;while(document.getElementById("text-burning-"+counter)){counter++;}self.args.id="text-burning-"+counter;}var canvas_id;var el=document.getElementById(self.args.id);if(!el){document.write('<canvas id="'+self.args.id+'" style="font-family:'+self.args.font+"; font-size:"+self.args.font_size+'px"></canvas>');canvas_id=self.args.id;}else{el.innerHTML='<canvas id="'+self.args.id+'-canvas" style="font-family:'+self.args.font+"; font-size:"+self.args.font_size+'px"></canvas>';canvas_id=self.args.id+"-canvas";}self.canvas=document.getElementById(canvas_id);if(self.canvas.getContext){var dc=self.canvas.getContext("2d");dc.font=self.font_string;self.text_size=dc.measureText(self.text);self.canvas.width=1.05*self.text_size.width;self.canvas.height=Math.floor(self.args.font_size*1.4);self.fire_decay=30*3/self.args.font_size;dc.fillStyle="rgb(0,0,0)";dc.fillRect(0,0,self.canvas.width,self.canvas.height);self.image=dc.getImageData(0,0,self.canvas.width,self.canvas.height);dc.fillStyle="rgb(0,0,0)";dc.fillRect(0,0,self.canvas.width,self.canvas.height);self.image_flame=dc.getImageData(0,0,self.canvas.width,self.canvas.height);dc.fillStyle="rgb(0,0,0)";dc.fillRect(0,0,self.canvas.width,self.canvas.height);dc.fillStyle="rgb(255,255,255)";dc.font=self.font_string;dc.textAlign="center";dc.textBaseline="bottom";dc.fillText(text,self.canvas.width/2,self.canvas.height);self.image_src=dc.getImageData(0,0,self.canvas.width,self.canvas.height);dc.putImageData(self.image,0,0);self.interval_id=setInterval(function(){BurningWords_Start();},speed_msec);}else{el.innerHTML="Canvas element is not supported";}}