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php gifencoder类下载,GIFEncoder.php

彭宏深
2023-12-01

/**

* imagecode辅助类

* @file:helper_GIFEncoder

* @author:kevin

* @date:2015-12-21下午3:04:28

*/

class helper_GIFEncoder{

var $GIF="GIF89a"; /* GIF header 6 bytes */

var $VER="GIFEncoder V2.06"; /* Encoder version */

var $BUF=Array();

var $LOP=0;

var $DIS=2;

var $COL=-1;

var $IMG=-1;

var $ERR=Array(

'ERR00'=>"Does not supported function for only one image!",

'ERR01'=>"Source is not a GIF image!",

'ERR02'=>"Unintelligible flag ",

'ERR03'=>"Could not make animation from animated GIF source",

);

function helper_GIFEncoder($GIF_src,$GIF_dly=100,$GIF_lop=0,$GIF_dis=0, $GIF_red=0,$GIF_grn=0,$GIF_blu=0,$GIF_mod='bin'){

if(!is_array($GIF_src)&&!is_array($GIF_tim)){

printf("%s: %s",$this->VER,$this->ERR['ERR00']);

exit(0);

}

$this->LOP=($GIF_lop>-1)?$GIF_lop:0;

$this->DIS=($GIF_dis>-1)?(($GIF_dis<3)?$GIF_dis:3):2;

$this->COL=($GIF_red>-1&&$GIF_grn>-1&&$GIF_blu>-1)?($GIF_red |($GIF_grn<<8)|($GIF_blu<<16)):-1;

for($i=0,$src_count=count($GIF_src);$i

if(strToLower($GIF_mod)=="url"){

$this->BUF[]=fread(fopen($GIF_src [$i],"rb"),filesize($GIF_src [$i]));

}elseif(strToLower($GIF_mod)=="bin"){

$this->BUF [ ]=$GIF_src [ $i ];

}else{

printf("%s: %s(%s)!",$this->VER,$this->ERR [ 'ERR02' ],$GIF_mod);

exit(0);

}

if(substr($this->BUF[$i],0,6)!="GIF87a"&&substr($this->BUF [$i],0,6)!="GIF89a"){

printf("%s: %d %s",$this->VER,$i,$this->ERR ['ERR01']);

exit(0);

}

for($j=(13+3*(2<BUF[$i]{10})&0x07))),$k=TRUE;$k;$j++){

switch($this->BUF [$i]{$j}){

case "!":

if((substr($this->BUF[$i],($j+3),8))=="NETSCAPE"){

printf("%s: %s(%s source)!",$this->VER,$this->ERR ['ERR03'],($i+1));

exit(0);

}

break;

case ";":

$k=FALSE;

break;

}

}

}

$this->GIFAddHeader();

for($i=0,$count_buf=count($this->BUF);$i

$this->GIFAddFrames($i,$GIF_dly[$i]);

}

$this->GIFAddFooter();

}

function GIFAddHeader(){

$cmap=0;

if(ord($this->BUF[0]{10})&0x80){

$cmap=3*(2<BUF [0]{10})&0x07));

$this->GIF.=substr($this->BUF [0],6,7);

$this->GIF.=substr($this->BUF [0],13,$cmap);

$this->GIF.="!\377\13NETSCAPE2.0\3\1".$this->GIFWord($this->LOP)."\0";

}

}

function GIFAddFrames($i,$d){

$Locals_str=13+3*(2 <BUF[$i]{10})&0x07));

$Locals_end=strlen($this->BUF[$i])-$Locals_str-1;

$Locals_tmp=substr($this->BUF[$i],$Locals_str,$Locals_end);

$Global_len=2<BUF [0]{10})&0x07);

$Locals_len=2<BUF[$i]{10})&0x07);

$Global_rgb=substr($this->BUF[0],13,3*(2<BUF[0]{10})&0x07)));

$Locals_rgb=substr($this->BUF[$i],13,3*(2<BUF[$i]{10})&0x07)));

$Locals_ext="!\xF9\x04".chr(($this->DIS<<2)+0).chr(($d>>0)&0xFF).chr(($d>>8)&0xFF)."\x0\x0";

if($this->COL>-1&&ord($this->BUF[$i]{10})&0x80){

for($j=0;$jBUF[$i]{10})&0x07));$j++){

if(ord($Locals_rgb{3*$j+0})==($this->COL>> 0)&0xFF&&ord($Locals_rgb{3*$j+1})==($this->COL>> 8)&0xFF&&ord($Locals_rgb{3*$j+2})==($this->COL>>16)&0xFF){

$Locals_ext="!\xF9\x04".chr(($this->DIS<<2)+1).chr(($d>>0)&0xFF).chr(($d>>8)&0xFF).chr($j)."\x0";

break;

}

}

}

switch($Locals_tmp{0}){

case "!":

$Locals_img=substr($Locals_tmp,8,10);

$Locals_tmp=substr($Locals_tmp,18,strlen($Locals_tmp)-18);

break;

case ",":

$Locals_img=substr($Locals_tmp,0,10);

$Locals_tmp=substr($Locals_tmp,10,strlen($Locals_tmp)-10);

break;

}

if(ord($this->BUF[$i]{10})&0x80&&$this->IMG>-1){

if($Global_len==$Locals_len){

if($this->GIFBlockCompare($Global_rgb,$Locals_rgb,$Global_len)){

$this->GIF.=($Locals_ext.$Locals_img.$Locals_tmp);

}else{

$byte=ord($Locals_img{9});

$byte|=0x80;

$byte&=0xF8;

$byte|=(ord($this->BUF [0]{10})&0x07);

$Locals_img{9}=chr($byte);

$this->GIF.=($Locals_ext.$Locals_img.$Locals_rgb.$Locals_tmp);

}

}else{

$byte=ord($Locals_img{9});

$byte|=0x80;

$byte&=0xF8;

$byte|=(ord($this->BUF[$i]{10})&0x07);

$Locals_img {9}=chr($byte);

$this->GIF.=($Locals_ext.$Locals_img.$Locals_rgb.$Locals_tmp);

}

}else{

$this->GIF.=($Locals_ext.$Locals_img.$Locals_tmp);

}

$this->IMG=1;

}

function GIFAddFooter(){

$this->GIF.=";";

}

function GIFBlockCompare($GlobalBlock,$LocalBlock,$Len){

for($i=0;$i

if($GlobalBlock{3*$i+0}!=$LocalBlock{3*$i+0}||$GlobalBlock{3*$i+1}!=$LocalBlock{3*$i+1}||$GlobalBlock{3*$i+2}!=$LocalBlock{3*$i+2}){

return(0);

}

}

return(1);

}

function GIFWord($int){

return(chr($int&0xFF).chr(($int>>8)&0xFF));

}

function GetAnimation(){

return($this->GIF);

}

}

?>

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