223 lines
7.7 KiB
PHP
Executable File
223 lines
7.7 KiB
PHP
Executable File
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006-2015 http://thinkphp.cn 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: yunwuxin <448901948@qq.com>
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// +----------------------------------------------------------------------
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namespace think\image\gif;
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class Encoder
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{
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public $GIF = "GIF89a"; /* GIF header 6 bytes */
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public $VER = "GIFEncoder V2.05"; /* Encoder version */
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public $BUF = [];
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public $LOP = 0;
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public $DIS = 2;
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public $COL = -1;
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public $IMG = -1;
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public $ERR = [
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'ERR00' => "Does not supported function for only one image!",
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'ERR01' => "Source is not a GIF image!",
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'ERR02' => "Unintelligible flag ",
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'ERR03' => "Does not make animation from animated GIF source",
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];
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFEncoder...
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::
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*/
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public function __construct(
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$GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,
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$GIF_red, $GIF_grn, $GIF_blu, $GIF_mod
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)
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{
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if (!is_array($GIF_src)) {
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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[$i]));
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} elseif (strtolower($GIF_mod) == "bin") {
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$this->BUF[] = $GIF_src[$i];
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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->addHeader();
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for ($i = 0; $i < count($this->BUF); $i++) {
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$this->addFrames($i, $GIF_dly[$i]);
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}
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$this->addFooter();
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFAddHeader...
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::
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*/
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public function addHeader()
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{
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if (ord($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" . $this->word($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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public function addFrames($i, $d)
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{
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$Locals_img = '';
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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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/**
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* @var string $Locals_img ;
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*/
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$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->blockCompare($Global_rgb, $Locals_rgb, $Global_len)) {
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$this->GIF .= ($Locals_ext . $Locals_img . $Locals_tmp);
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} else {
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$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 . $Locals_tmp);
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}
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} else {
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$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 . $Locals_tmp);
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}
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} else {
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$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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public function addFooter()
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{
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$this->GIF .= ";";
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFBlockCompare...
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::
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*/
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public function blockCompare($GlobalBlock, $LocalBlock, $Len)
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{
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for ($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 * $i + 2}
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) {
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return (0);
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}
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}
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return (1);
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}
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: GIFWord...
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::
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*/
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public function word($int)
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{
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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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{
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return ($this->GIF);
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}
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}
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