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<?php
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// +----------------------------------------------------------------------
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// | TOPThink [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2010 http://topthink.com All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: 麦当苗儿 <zuojiazi@vip.qq.com> <http://www.zjzit.cn>
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// +----------------------------------------------------------------------
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// | GIF.class.php 2013-03-09
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// +----------------------------------------------------------------------
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namespace Think\Image\Driver;
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class GIF{
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/**
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* GIF帧列表
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* @var array
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*/
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private $frames = array();
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/**
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* 每帧等待时间列表
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* @var array
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*/
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private $delays = array();
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/**
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* 构造方法，用于解码GIF图片
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* @param string $src GIF图片数据
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* @param string $mod 图片数据类型
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*/
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public function __construct($src = null, $mod = 'url') {
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if(!is_null($src)){
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if('url' == $mod && is_file($src)){
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$src = file_get_contents($src);
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}
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/* 解码GIF图片 */
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try{
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$de = new GIFDecoder($src);
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$this->frames = $de->GIFGetFrames();
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$this->delays = $de->GIFGetDelays();
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} catch(\Exception $e){
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E("解码GIF图片出错");
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}
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}
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}
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/**
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* 设置或获取当前帧的数据
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* @param string $stream 二进制数据流
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* @return boolean 获取到的数据
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*/
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public function image($stream = null){
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if(is_null($stream)){
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$current = current($this->frames);
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return false === $current ? reset($this->frames) : $current;
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} else {
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$this->frames[key($this->frames)] = $stream;
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}
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}
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/**
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* 将当前帧移动到下一帧
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* @return string 当前帧数据
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*/
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public function nextImage(){
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return next($this->frames);
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}
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/**
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* 编码并保存当前GIF图片
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* @param string $gifname 图片名称
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*/
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public function save($gifname){
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$gif = new GIFEncoder($this->frames, $this->delays, 0, 2, 0, 0, 0, 'bin');
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file_put_contents($gifname, $gif->GetAnimation());
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}
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFEncoder Version 2.0 by László Zsidi, http://gifs.hu
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::
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:: This class is a rewritten 'GifMerge.class.php' version.
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::
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:: Modification:
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:: - Simplified and easy code,
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:: - Ultra fast encoding,
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:: - Built-in errors,
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:: - Stable working
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::
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::
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:: Updated at 2007. 02. 13. '00.05.AM'
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::
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::
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::
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:: Try on-line GIFBuilder Form demo based on GIFEncoder.
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::
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:: http://gifs.hu/phpclasses/demos/GifBuilder/
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::
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:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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*/
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Class GIFEncoder {
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private $GIF = "GIF89a"; /* GIF header 6 bytes */
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private $VER = "GIFEncoder V2.05"; /* Encoder version */
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private $BUF = Array ( );
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private $LOP = 0;
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private $DIS = 2;
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private $COL = -1;
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private $IMG = -1;
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private $ERR = Array (
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'ERR00' => "Does not supported function for only one image!",
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'ERR01' => "Source is not a GIF image!",
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'ERR02' => "Unintelligible flag ",
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'ERR03' => "Does not make animation from animated GIF source",
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);
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFEncoder...
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::
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*/
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public function __construct($GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,$GIF_red, $GIF_grn, $GIF_blu, $GIF_mod) {
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if ( ! is_array ( $GIF_src ) && ! is_array ( $GIF_dly ) ) {
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printf ( "%s: %s", $this->VER, $this->ERR [ 'ERR00' ] );
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exit ( 0 );
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}
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$this->LOP = ( $GIF_lop > -1 ) ? $GIF_lop : 0;
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$this->DIS = ( $GIF_dis > -1 ) ? ( ( $GIF_dis < 3 ) ? $GIF_dis : 3 ) : 2;
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$this->COL = ( $GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1 ) ?
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( $GIF_red | ( $GIF_grn << 8 ) | ( $GIF_blu << 16 ) ) : -1;
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for ( $i = 0; $i < count ( $GIF_src ); $i++ ) {
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if ( strToLower ( $GIF_mod ) == "url" ) {
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$this->BUF [ ] = fread ( fopen ( $GIF_src [ $i ], "rb" ), filesize ( $GIF_src [ $i ] ) );
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}
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else if ( strToLower ( $GIF_mod ) == "bin" ) {
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$this->BUF [ ] = $GIF_src [ $i ];
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}
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else {
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printf ( "%s: %s ( %s )!", $this->VER, $this->ERR [ 'ERR02' ], $GIF_mod );
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exit ( 0 );
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}
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if ( substr ( $this->BUF [ $i ], 0, 6 ) != "GIF87a" && substr ( $this->BUF [ $i ], 0, 6 ) != "GIF89a" ) {
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printf ( "%s: %d %s", $this->VER, $i, $this->ERR [ 'ERR01' ] );
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exit ( 0 );
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}
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for ( $j = ( 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) ), $k = TRUE; $k; $j++ ) {
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switch ( $this->BUF [ $i ] { $j } ) {
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case "!":
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if ( ( substr ( $this->BUF [ $i ], ( $j + 3 ), 8 ) ) == "NETSCAPE" ) {
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printf ( "%s: %s ( %s source )!", $this->VER, $this->ERR [ 'ERR03' ], ( $i + 1 ) );
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exit ( 0 );
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}
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break;
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case ";":
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$k = FALSE;
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break;
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}
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}
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}
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$this->GIFAddHeader ( );
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for ( $i = 0; $i < count ( $this->BUF ); $i++ ) {
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$this->GIFAddFrames ( $i, $GIF_dly [ $i ] );
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}
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$this->GIFAddFooter ( );
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFAddHeader...
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::
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*/
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private function GIFAddHeader ( ) {
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$cmap = 0;
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if ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x80 ) {
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$cmap = 3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) );
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$this->GIF .= substr ( $this->BUF [ 0 ], 6, 7 );
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$this->GIF .= substr ( $this->BUF [ 0 ], 13, $cmap );
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$this->GIF .= "!\377\13NETSCAPE2.0\3\1" . $this->GIFWord ( $this->LOP ) . "\0";
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}
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFAddFrames...
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::
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*/
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private function GIFAddFrames ( $i, $d ) {
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$Locals_str = 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) );
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$Locals_end = strlen ( $this->BUF [ $i ] ) - $Locals_str - 1;
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$Locals_tmp = substr ( $this->BUF [ $i ], $Locals_str, $Locals_end );
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$Global_len = 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 );
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$Locals_len = 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );
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$Global_rgb = substr ( $this->BUF [ 0 ], 13,
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3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) ) );
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$Locals_rgb = substr ( $this->BUF [ $i ], 13,
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3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) );
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$Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS << 2 ) + 0 ) .
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chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . "\x0\x0";
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if ( $this->COL > -1 && ord ( $this->BUF [ $i ] { 10 } ) & 0x80 ) {
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for ( $j = 0; $j < ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ); $j++ ) {
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if (
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ord ( $Locals_rgb { 3 * $j + 0 } ) == ( ( $this->COL >> 16 ) & 0xFF ) &&
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ord ( $Locals_rgb { 3 * $j + 1 } ) == ( ( $this->COL >> 8 ) & 0xFF ) &&
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ord ( $Locals_rgb { 3 * $j + 2 } ) == ( ( $this->COL >> 0 ) & 0xFF )
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) {
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$Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS << 2 ) + 1 ) .
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chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . chr ( $j ) . "\x0";
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break;
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}
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}
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}
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switch ( $Locals_tmp { 0 } ) {
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case "!":
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$Locals_img = substr ( $Locals_tmp, 8, 10 );
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$Locals_tmp = substr ( $Locals_tmp, 18, strlen ( $Locals_tmp ) - 18 );
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break;
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case ",":
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$Locals_img = substr ( $Locals_tmp, 0, 10 );
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$Locals_tmp = substr ( $Locals_tmp, 10, strlen ( $Locals_tmp ) - 10 );
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break;
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}
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if ( ord ( $this->BUF [ $i ] { 10 } ) & 0x80 && $this->IMG > -1 ) {
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if ( $Global_len == $Locals_len ) {
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if ( $this->GIFBlockCompare ( $Global_rgb, $Locals_rgb, $Global_len ) ) {
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$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
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}
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else {
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$byte = ord ( $Locals_img { 9 } );
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$byte |= 0x80;
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$byte &= 0xF8;
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$byte |= ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 );
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$Locals_img { 9 } = chr ( $byte );
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$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
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}
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}
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else {
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$byte = ord ( $Locals_img { 9 } );
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$byte |= 0x80;
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$byte &= 0xF8;
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$byte |= ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );
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$Locals_img { 9 } = chr ( $byte );
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$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
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}
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}
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else {
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$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
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}
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$this->IMG = 1;
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFAddFooter...
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::
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*/
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private function GIFAddFooter ( ) {
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$this->GIF .= ";";
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFBlockCompare...
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::
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*/
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private function GIFBlockCompare ( $GlobalBlock, $LocalBlock, $Len ) {
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for ( $i = 0; $i < $Len; $i++ ) {
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if (
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$GlobalBlock { 3 * $i + 0 } != $LocalBlock { 3 * $i + 0 } ||
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$GlobalBlock { 3 * $i + 1 } != $LocalBlock { 3 * $i + 1 } ||
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$GlobalBlock { 3 * $i + 2 } != $LocalBlock { 3 * $i + 2 }
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) {
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return ( 0 );
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}
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}
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return ( 1 );
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFWord...
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::
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*/
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private function GIFWord ( $int ) {
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return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) );
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GetAnimation...
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::
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*/
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public function GetAnimation ( ) {
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return ( $this->GIF );
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}
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFDecoder Version 2.0 by László Zsidi, http://gifs.hu
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::
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:: Created at 2007. 02. 01. '07.47.AM'
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::
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::
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::
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::
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:: Try on-line GIFBuilder Form demo based on GIFDecoder.
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::
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:: http://gifs.hu/phpclasses/demos/GifBuilder/
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::
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:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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*/
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Class GIFDecoder {
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private $GIF_buffer = Array ( );
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private $GIF_arrays = Array ( );
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private $GIF_delays = Array ( );
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private $GIF_stream = "";
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private $GIF_string = "";
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private $GIF_bfseek = 0;
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private $GIF_screen = Array ( );
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private $GIF_global = Array ( );
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private $GIF_sorted;
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private $GIF_colorS;
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private $GIF_colorC;
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private $GIF_colorF;
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFDecoder ( $GIF_pointer )
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::
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*/
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public function __construct ( $GIF_pointer ) {
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$this->GIF_stream = $GIF_pointer;
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$this->GIFGetByte ( 6 ); // GIF89a
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$this->GIFGetByte ( 7 ); // Logical Screen Descriptor
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$this->GIF_screen = $this->GIF_buffer;
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$this->GIF_colorF = $this->GIF_buffer [ 4 ] & 0x80 ? 1 : 0;
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$this->GIF_sorted = $this->GIF_buffer [ 4 ] & 0x08 ? 1 : 0;
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$this->GIF_colorC = $this->GIF_buffer [ 4 ] & 0x07;
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$this->GIF_colorS = 2 << $this->GIF_colorC;
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if ( $this->GIF_colorF == 1 ) {
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$this->GIFGetByte ( 3 * $this->GIF_colorS );
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$this->GIF_global = $this->GIF_buffer;
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}
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/*
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*
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* 05.06.2007.
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* Made a little modification
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*
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*
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- for ( $cycle = 1; $cycle; ) {
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+ if ( GIFDecoder::GIFGetByte ( 1 ) ) {
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- switch ( $this->GIF_buffer [ 0 ] ) {
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- case 0x21:
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- GIFDecoder::GIFReadExtensions ( );
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- break;
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- case 0x2C:
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- GIFDecoder::GIFReadDescriptor ( );
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- break;
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- case 0x3B:
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- $cycle = 0;
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- break;
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- }
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- }
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+ else {
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+ $cycle = 0;
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+ }
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- }
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*/
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for ( $cycle = 1; $cycle; ) {
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if ( $this->GIFGetByte ( 1 ) ) {
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switch ( $this->GIF_buffer [ 0 ] ) {
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case 0x21:
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$this->GIFReadExtensions ( );
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break;
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case 0x2C:
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$this->GIFReadDescriptor ( );
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break;
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case 0x3B:
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$cycle = 0;
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
else {
|
|
|
$cycle = 0;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
/*
|
|
|
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
|
|
::
|
|
|
:: GIFReadExtension ( )
|
|
|
::
|
|
|
*/
|
|
|
private function GIFReadExtensions ( ) {
|
|
|
$this->GIFGetByte ( 1 );
|
|
|
for ( ; ; ) {
|
|
|
$this->GIFGetByte ( 1 );
|
|
|
if ( ( $u = $this->GIF_buffer [ 0 ] ) == 0x00 ) {
|
|
|
break;
|
|
|
}
|
|
|
$this->GIFGetByte ( $u );
|
|
|
/*
|
|
|
* 07.05.2007.
|
|
|
* Implemented a new line for a new function
|
|
|
* to determine the originaly delays between
|
|
|
* frames.
|
|
|
*
|
|
|
*/
|
|
|
if ( $u == 4 ) {
|
|
|
$this->GIF_delays [ ] = ( $this->GIF_buffer [ 1 ] | $this->GIF_buffer [ 2 ] << 8 );
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
/*
|
|
|
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
|
|
::
|
|
|
:: GIFReadExtension ( )
|
|
|
::
|
|
|
*/
|
|
|
private function GIFReadDescriptor ( ) {
|
|
|
$GIF_screen = Array ( );
|
|
|
|
|
|
$this->GIFGetByte ( 9 );
|
|
|
$GIF_screen = $this->GIF_buffer;
|
|
|
$GIF_colorF = $this->GIF_buffer [ 8 ] & 0x80 ? 1 : 0;
|
|
|
if ( $GIF_colorF ) {
|
|
|
$GIF_code = $this->GIF_buffer [ 8 ] & 0x07;
|
|
|
$GIF_sort = $this->GIF_buffer [ 8 ] & 0x20 ? 1 : 0;
|
|
|
}
|
|
|
else {
|
|
|
$GIF_code = $this->GIF_colorC;
|
|
|
$GIF_sort = $this->GIF_sorted;
|
|
|
}
|
|
|
$GIF_size = 2 << $GIF_code;
|
|
|
$this->GIF_screen [ 4 ] &= 0x70;
|
|
|
$this->GIF_screen [ 4 ] |= 0x80;
|
|
|
$this->GIF_screen [ 4 ] |= $GIF_code;
|
|
|
if ( $GIF_sort ) {
|
|
|
$this->GIF_screen [ 4 ] |= 0x08;
|
|
|
}
|
|
|
$this->GIF_string = "GIF87a";
|
|
|
$this->GIFPutByte ( $this->GIF_screen );
|
|
|
if ( $GIF_colorF == 1 ) {
|
|
|
$this->GIFGetByte ( 3 * $GIF_size );
|
|
|
$this->GIFPutByte ( $this->GIF_buffer );
|
|
|
}
|
|
|
else {
|
|
|
$this->GIFPutByte ( $this->GIF_global );
|
|
|
}
|
|
|
$this->GIF_string .= chr ( 0x2C );
|
|
|
$GIF_screen [ 8 ] &= 0x40;
|
|
|
$this->GIFPutByte ( $GIF_screen );
|
|
|
$this->GIFGetByte ( 1 );
|
|
|
$this->GIFPutByte ( $this->GIF_buffer );
|
|
|
for ( ; ; ) {
|
|
|
$this->GIFGetByte ( 1 );
|
|
|
$this->GIFPutByte ( $this->GIF_buffer );
|
|
|
if ( ( $u = $this->GIF_buffer [ 0 ] ) == 0x00 ) {
|
|
|
break;
|
|
|
}
|
|
|
$this->GIFGetByte ( $u );
|
|
|
$this->GIFPutByte ( $this->GIF_buffer );
|
|
|
}
|
|
|
$this->GIF_string .= chr ( 0x3B );
|
|
|
/*
|
|
|
Add frames into $GIF_stream array...
|
|
|
*/
|
|
|
$this->GIF_arrays [ ] = $this->GIF_string;
|
|
|
}
|
|
|
/*
|
|
|
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
|
|
::
|
|
|
:: GIFGetByte ( $len )
|
|
|
::
|
|
|
*/
|
|
|
|
|
|
/*
|
|
|
*
|
|
|
* 05.06.2007.
|
|
|
* Made a little modification
|
|
|
*
|
|
|
*
|
|
|
- function GIFGetByte ( $len ) {
|
|
|
- $this->GIF_buffer = Array ( );
|
|
|
-
|
|
|
- for ( $i = 0; $i < $len; $i++ ) {
|
|
|
+ if ( $this->GIF_bfseek > strlen ( $this->GIF_stream ) ) {
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
- $this->GIF_buffer [ ] = ord ( $this->GIF_stream { $this->GIF_bfseek++ } );
|
|
|
- }
|
|
|
+ return 1;
|
|
|
- }
|
|
|
*/
|
|
|
private function GIFGetByte ( $len ) {
|
|
|
$this->GIF_buffer = Array ( );
|
|
|
|
|
|
for ( $i = 0; $i < $len; $i++ ) {
|
|
|
if ( $this->GIF_bfseek > strlen ( $this->GIF_stream ) ) {
|
|
|
return 0;
|
|
|
}
|
|
|
$this->GIF_buffer [ ] = ord ( $this->GIF_stream { $this->GIF_bfseek++ } );
|
|
|
}
|
|
|
return 1;
|
|
|
}
|
|
|
/*
|
|
|
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
|
|
::
|
|
|
:: GIFPutByte ( $bytes )
|
|
|
::
|
|
|
*/
|
|
|
private function GIFPutByte ( $bytes ) {
|
|
|
for ( $i = 0; $i < count ( $bytes ); $i++ ) {
|
|
|
$this->GIF_string .= chr ( $bytes [ $i ] );
|
|
|
}
|
|
|
}
|
|
|
/*
|
|
|
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
|
|
::
|
|
|
:: PUBLIC FUNCTIONS
|
|
|
::
|
|
|
::
|
|
|
:: GIFGetFrames ( )
|
|
|
::
|
|
|
*/
|
|
|
public function GIFGetFrames ( ) {
|
|
|
return ( $this->GIF_arrays );
|
|
|
}
|
|
|
/*
|
|
|
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
|
|
::
|
|
|
:: GIFGetDelays ( )
|
|
|
::
|
|
|
*/
|
|
|
public function GIFGetDelays ( ) {
|
|
|
return ( $this->GIF_delays );
|
|
|
}
|
|
|
}
|