585 lines
17 KiB
PHP
585 lines
17 KiB
PHP
<?php
|
||
// +----------------------------------------------------------------------
|
||
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
|
||
// +----------------------------------------------------------------------
|
||
// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
|
||
// +----------------------------------------------------------------------
|
||
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
|
||
// +----------------------------------------------------------------------
|
||
// | Author: 麦当苗儿 <zuojiazi.cn@gmail.com> <http://www.zjzit.cn>
|
||
// +----------------------------------------------------------------------
|
||
|
||
namespace org\image\driver;
|
||
|
||
class Gif
|
||
{
|
||
/**
|
||
* GIF帧列表
|
||
*
|
||
* @var array
|
||
*/
|
||
private $frames = [];
|
||
|
||
/**
|
||
* 每帧等待时间列表
|
||
*
|
||
* @var array
|
||
*/
|
||
private $delays = [];
|
||
|
||
/**
|
||
* 构造方法，用于解码GIF图片
|
||
*
|
||
* @param string $src GIF图片数据
|
||
* @param string $mod 图片数据类型
|
||
*/
|
||
public function __construct($src = null, $mod = 'url')
|
||
{
|
||
if (!is_null($src)) {
|
||
if ('url' == $mod && is_file($src)) {
|
||
$src = file_get_contents($src);
|
||
}
|
||
|
||
/* 解码GIF图片 */
|
||
try {
|
||
$de = new GIFDecoder($src);
|
||
$this->frames = $de->GIFGetFrames();
|
||
$this->delays = $de->GIFGetDelays();
|
||
} catch (\Exception $e) {
|
||
throw new \Exception("解码GIF图片出错");
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 设置或获取当前帧的数据
|
||
*
|
||
* @param string $stream 二进制数据流
|
||
* @return mixed 获取到的数据
|
||
*/
|
||
public function image($stream = null)
|
||
{
|
||
if (is_null($stream)) {
|
||
$current = current($this->frames);
|
||
return false === $current ? reset($this->frames) : $current;
|
||
}
|
||
$this->frames[key($this->frames)] = $stream;
|
||
}
|
||
|
||
/**
|
||
* 将当前帧移动到下一帧
|
||
*
|
||
* @return string 当前帧数据
|
||
*/
|
||
public function nextImage()
|
||
{
|
||
return next($this->frames);
|
||
}
|
||
|
||
/**
|
||
* 编码并保存当前GIF图片
|
||
*
|
||
* @param string $gifname 图片名称
|
||
*/
|
||
public function save($gifname)
|
||
{
|
||
$gif = new GIFEncoder($this->frames, $this->delays, 0, 2, 0, 0, 0, 'bin');
|
||
file_put_contents($gifname, $gif->GetAnimation());
|
||
}
|
||
|
||
}
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFEncoder Version 2.0 by László Zsidi, http://gifs.hu
|
||
::
|
||
:: This class is a rewritten 'GifMerge.class.php' version.
|
||
::
|
||
:: Modification:
|
||
:: - Simplified and easy code,
|
||
:: - Ultra fast encoding,
|
||
:: - Built-in errors,
|
||
:: - Stable working
|
||
::
|
||
::
|
||
:: Updated at 2007. 02. 13. '00.05.AM'
|
||
::
|
||
::
|
||
::
|
||
:: Try on-line GIFBuilder Form demo based on GIFEncoder.
|
||
::
|
||
:: http://gifs.hu/phpclasses/demos/GifBuilder/
|
||
::
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
*/
|
||
class GIFEncode
|
||
{
|
||
public $GIF = "GIF89a"; /* GIF header 6 bytes */
|
||
public $VER = "GIFEncoder V2.05"; /* Encoder version */
|
||
|
||
public $BUF = [];
|
||
public $LOP = 0;
|
||
public $DIS = 2;
|
||
public $COL = -1;
|
||
public $IMG = -1;
|
||
|
||
public $ERR = [
|
||
'ERR00' => "Does not supported function for only one image!",
|
||
'ERR01' => "Source is not a GIF image!",
|
||
'ERR02' => "Unintelligible flag ",
|
||
'ERR03' => "Does not make animation from animated GIF source",
|
||
];
|
||
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFEncoder...
|
||
::
|
||
*/
|
||
public function GIFEncoder(
|
||
$GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,
|
||
$GIF_red, $GIF_grn, $GIF_blu, $GIF_mod
|
||
) {
|
||
if (!is_array($GIF_src)) {
|
||
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; $i < count($GIF_src); $i++) {
|
||
if (strToLower($GIF_mod) == "url") {
|
||
$this->BUF[] = fread(fopen($GIF_src[$i], "rb"), filesize($GIF_src[$i]));
|
||
} else if (strToLower($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 << (ord($this->BUF[$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 ";":
|
||
$k = false;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
self::GIFAddHeader();
|
||
for ($i = 0; $i < count($this->BUF); $i++) {
|
||
self::GIFAddFrames($i, $GIF_dly[$i]);
|
||
}
|
||
self::GIFAddFooter();
|
||
}
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFAddHeader...
|
||
::
|
||
*/
|
||
public function GIFAddHeader()
|
||
{
|
||
|
||
if (ord($this->BUF[0]{10}) & 0x80) {
|
||
$cmap = 3 * (2 << (ord($this->BUF[0]{10}) & 0x07));
|
||
|
||
$this->GIF .= substr($this->BUF[0], 6, 7);
|
||
$this->GIF .= substr($this->BUF[0], 13, $cmap);
|
||
$this->GIF .= "!\377\13NETSCAPE2.0\3\1" . self::GIFWord($this->LOP) . "\0";
|
||
}
|
||
}
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFAddFrames...
|
||
::
|
||
*/
|
||
public function GIFAddFrames($i, $d)
|
||
{
|
||
$Locals_img = '';
|
||
$Locals_str = 13 + 3 * (2 << (ord($this->BUF[$i]{10}) & 0x07));
|
||
|
||
$Locals_end = strlen($this->BUF[$i]) - $Locals_str - 1;
|
||
$Locals_tmp = substr($this->BUF[$i], $Locals_str, $Locals_end);
|
||
|
||
$Global_len = 2 << (ord($this->BUF[0]{10}) & 0x07);
|
||
$Locals_len = 2 << (ord($this->BUF[$i]{10}) & 0x07);
|
||
|
||
$Global_rgb = substr($this->BUF[0], 13,
|
||
3 * (2 << (ord($this->BUF[0]{10}) & 0x07)));
|
||
$Locals_rgb = substr($this->BUF[$i], 13,
|
||
3 * (2 << (ord($this->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; $j < (2 << (ord($this->BUF[$i]{10}) & 0x07)); $j++) {
|
||
if (
|
||
ord($Locals_rgb{3 * $j + 0}) == (($this->COL >> 16) & 0xFF) &&
|
||
ord($Locals_rgb{3 * $j + 1}) == (($this->COL >> 8) & 0xFF) &&
|
||
ord($Locals_rgb{3 * $j + 2}) == (($this->COL >> 0) & 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 "!":
|
||
/**
|
||
* @var string $Locals_img;
|
||
*/
|
||
$Locals_img = substr($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 == $Locals_len) {
|
||
if (self::GIFBlockCompare($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;
|
||
}
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFAddFooter...
|
||
::
|
||
*/
|
||
public function GIFAddFooter()
|
||
{
|
||
$this->GIF .= ";";
|
||
}
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFBlockCompare...
|
||
::
|
||
*/
|
||
public function GIFBlockCompare($GlobalBlock, $LocalBlock, $Len)
|
||
{
|
||
|
||
for ($i = 0; $i < $Len; $i++) {
|
||
if (
|
||
$GlobalBlock{3 * $i + 0} != $LocalBlock{3 * $i + 0} ||
|
||
$GlobalBlock{3 * $i + 1} != $LocalBlock{3 * $i + 1} ||
|
||
$GlobalBlock{3 * $i + 2} != $LocalBlock{3 * $i + 2}
|
||
) {
|
||
return (0);
|
||
}
|
||
}
|
||
|
||
return (1);
|
||
}
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFWord...
|
||
::
|
||
*/
|
||
public function GIFWord($int)
|
||
{
|
||
|
||
return (chr($int & 0xFF) . chr(($int >> 8) & 0xFF));
|
||
}
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GetAnimation...
|
||
::
|
||
*/
|
||
public function GetAnimation()
|
||
{
|
||
return ($this->GIF);
|
||
}
|
||
}
|
||
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFDecoder Version 2.0 by László Zsidi, http://gifs.hu
|
||
::
|
||
:: Created at 2007. 02. 01. '07.47.AM'
|
||
::
|
||
::
|
||
::
|
||
::
|
||
:: Try on-line GIFBuilder Form demo based on GIFDecoder.
|
||
::
|
||
:: http://gifs.hu/phpclasses/demos/GifBuilder/
|
||
::
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
*/
|
||
|
||
class GIFDecoder
|
||
{
|
||
public $GIF_buffer = [];
|
||
public $GIF_arrays = [];
|
||
public $GIF_delays = [];
|
||
public $GIF_stream = "";
|
||
public $GIF_string = "";
|
||
public $GIF_bfseek = 0;
|
||
|
||
public $GIF_screen = [];
|
||
public $GIF_global = [];
|
||
public $GIF_sorted;
|
||
public $GIF_colorS;
|
||
public $GIF_colorC;
|
||
public $GIF_colorF;
|
||
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFDecoder ( $GIF_pointer )
|
||
::
|
||
*/
|
||
public function GIFDecoder($GIF_pointer)
|
||
{
|
||
$this->GIF_stream = $GIF_pointer;
|
||
|
||
GIFDecoder::GIFGetByte(6); // GIF89a
|
||
GIFDecoder::GIFGetByte(7); // Logical Screen Descriptor
|
||
|
||
$this->GIF_screen = $this->GIF_buffer;
|
||
$this->GIF_colorF = $this->GIF_buffer[4] & 0x80 ? 1 : 0;
|
||
$this->GIF_sorted = $this->GIF_buffer[4] & 0x08 ? 1 : 0;
|
||
$this->GIF_colorC = $this->GIF_buffer[4] & 0x07;
|
||
$this->GIF_colorS = 2 << $this->GIF_colorC;
|
||
|
||
if (1 == $this->GIF_colorF) {
|
||
GIFDecoder::GIFGetByte(3 * $this->GIF_colorS);
|
||
$this->GIF_global = $this->GIF_buffer;
|
||
}
|
||
/*
|
||
*
|
||
* 05.06.2007.
|
||
* Made a little modification
|
||
*
|
||
*
|
||
- for ( $cycle = 1; $cycle; ) {
|
||
+ if ( GIFDecoder::GIFGetByte ( 1 ) ) {
|
||
- switch ( $this->GIF_buffer [ 0 ] ) {
|
||
- case 0x21:
|
||
- GIFDecoder::GIFReadExtensions ( );
|
||
- break;
|
||
- case 0x2C:
|
||
- GIFDecoder::GIFReadDescriptor ( );
|
||
- break;
|
||
- case 0x3B:
|
||
- $cycle = 0;
|
||
- break;
|
||
- }
|
||
- }
|
||
+ else {
|
||
+ $cycle = 0;
|
||
+ }
|
||
- }
|
||
*/
|
||
for ($cycle = 1; $cycle;) {
|
||
if (GIFDecoder::GIFGetByte(1)) {
|
||
switch ($this->GIF_buffer[0]) {
|
||
case 0x21:
|
||
GIFDecoder::GIFReadExtensions();
|
||
break;
|
||
case 0x2C:
|
||
GIFDecoder::GIFReadDescriptor();
|
||
break;
|
||
case 0x3B:
|
||
$cycle = 0;
|
||
break;
|
||
}
|
||
} else {
|
||
$cycle = 0;
|
||
}
|
||
}
|
||
}
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFReadExtension ( )
|
||
::
|
||
*/
|
||
public function GIFReadExtensions()
|
||
{
|
||
GIFDecoder::GIFGetByte(1);
|
||
for (;;) {
|
||
GIFDecoder::GIFGetByte(1);
|
||
if (($u = $this->GIF_buffer[0]) == 0x00) {
|
||
break;
|
||
}
|
||
GIFDecoder::GIFGetByte($u);
|
||
/*
|
||
* 07.05.2007.
|
||
* Implemented a new line for a new function
|
||
* to determine the originaly delays between
|
||
* frames.
|
||
*
|
||
*/
|
||
if (4 == $u) {
|
||
$this->GIF_delays[] = ($this->GIF_buffer[1] | $this->GIF_buffer[2] << 8);
|
||
}
|
||
}
|
||
}
|
||
/*
|
||
:::::::::::::::::::::::::::::::::::::::::::::::::::
|
||
::
|
||
:: GIFReadExtension ( )
|
||
::
|
||
*/
|
||
public function GIFReadDescriptor()
|
||
{
|
||
|
||
GIFDecoder::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;
|
||
}
|
||
$this->GIF_string = "GIF87a";
|
||
GIFDecoder::GIFPutByte($this->GIF_screen);
|
||
if (1 == $GIF_colorF) {
|
||
GIFDecoder::GIFGetByte(3 * $GIF_size);
|
||
GIFDecoder::GIFPutByte($this->GIF_buffer);
|
||
} else {
|
||
GIFDecoder::GIFPutByte($this->GIF_global);
|
||
}
|
||
$this->GIF_string .= chr(0x2C);
|
||
$GIF_screen[8] &= 0x40;
|
||
GIFDecoder::GIFPutByte($GIF_screen);
|
||
GIFDecoder::GIFGetByte(1);
|
||
GIFDecoder::GIFPutByte($this->GIF_buffer);
|
||
for (;;) {
|
||
GIFDecoder::GIFGetByte(1);
|
||
GIFDecoder::GIFPutByte($this->GIF_buffer);
|
||
if (($u = $this->GIF_buffer[0]) == 0x00) {
|
||
break;
|
||
}
|
||
GIFDecoder::GIFGetByte($u);
|
||
GIFDecoder::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 { $this->GIF_bfseek++ } );
|
||
- }
|
||
+ return 1;
|
||
- }
|
||
*/
|
||
public function GIFGetByte($len)
|
||
{
|
||
$this->GIF_buffer = [];
|
||
|
||
for ($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 ( $bytes )
|
||
::
|
||
*/
|
||
public function GIFPutByte($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);
|
||
}
|
||
}
|