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php gifencoder类下载,PHP使用GIFEncoder类处理gif图片实例_PHP教程

林博厚
2023-12-01

下面贴处理的源代码:

复制代码 代码如下:

require_once(“gifencoder.php”); //载入编码 文件

$gif = new GIFEncoder(); //实例化gif解码对象

$gif->load(“test.gif”); //载入要解码的gif图像

for($i=0;$iIMGS[“frames”]);$i++){ //根据 gif图像的帧数获取每帧的图像数据

$im = imagecreatefromstring($gif->getgif($i)); //利用GD库函数将GIF转得标准些

imagegif($im, $i.”.gif”); //用文件形式保存生成的每帧图像数据,当然也可以用变量

}

imagedestroy($im);

ob_start();

for($i=0;sizeof($gif->IMGS[“frames”]);$i++){

$im=imagecreatefromgif(“0.gif”); //根据每帧的图片创建图像

if($i>0){ //不是第一帧 复制图片和第一帧合并

$frame=imagecreatefromgif(“$i.gif”); //读取当前帧的图像

$w = imagesx($frame); //获取图像宽度

$y= imagesy($frame); //获取图像高度

imagecopy($im,$frame,0,0,0,0,$w,$y); //把当前帧图像和第一帧图像复制合并

imagedestroy($frame); //销毁当前图像

}

imagejpeg($im,$i.”frame.jpg”); //合并后保存为jpg格式

$im=imagecreatefromjpeg($i.”frame.jpg”); //从jpg格式重新创建图像

imagegif($im); //转为gif格式

imagedestroy($im); //销毁图像

$imagedata[] = ob_get_contents(); //创建这一帧的图像数据

ob_clean();

}

$diy[]=0;//开始延迟时间

$gif = new GIFEncoder($imagedata,$diy,0,2,0,0,0,”bin”); //实例化gif编码对象

ob_start();

Header (‘Content-type:image/gif’);

echo $gif->GetAnimation();

?>

?php

以上代码 基本就是一个完整的 读取一个gif图片,对其进行解码,然后再编码成gif图片的完整过程了..

有了这个就可以在网上随意抓取gif图片然后进行修改。甚至直接用php就可以自己制作一些gif图片.

GIFEncoder类源码:

复制代码 代码如下:

Class 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”,

);

/*

:::::::::::::::::::::::::::::::::::::::::::::::::::

::

:: GIFEncoder…

::

*/

function GIFEncoder (

$GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,

$GIF_red, $GIF_grn, $GIF_blu, $GIF_mod

) {

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; $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

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;

}

}

}

GIFEncoder::GIFAddHeader ( );

for ( $i = 0; $i BUF ); $i++ ) {

GIFEncoder::GIFAddFrames ( $i, $GIF_dly [ $i ] );

}

GIFEncoder::GIFAddFooter ( );

}

/*

:::::::::::::::::::::::::::::::::::::::::::::::::::

::

:: GIFAddHeader…

::

*/

function GIFAddHeader ( ) {

$cmap = 0;

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

$cmap = 3 * ( 2

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

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

$this->GIF .= “!/377/13NETSCAPE2.0/3/1” . GIFEncoder::GIFWord ( $this->LOP ) . “/0”;

}

}

/*

:::::::::::::::::::::::::::::::::::::::::::::::::::

::

:: GIFAddFrames…

::

*/

function GIFAddFrames ( $i, $d ) {

$Locals_str = 13 + 3 * ( 2

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

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

$Global_len = 2

$Locals_len = 2

$Global_rgb = substr ( $this->BUF [ 0 ], 13,

3 * ( 2

$Locals_rgb = substr ( $this->BUF [ $i ], 13,

3 * ( 2

$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

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 ( GIFEncoder::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…

::

*/

function GIFAddFooter ( ) {

$this->GIF .= “;”;

}

/*

:::::::::::::::::::::::::::::::::::::::::::::::::::

::

:: GIFBlockCompare…

::

*/

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…

::

*/

function GIFWord ( $int ) {

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

}

/*

:::::::::::::::::::::::::::::::::::::::::::::::::::

::

:: GetAnimation…

::

*/

function GetAnimation ( ) {

return ( $this->GIF );

}

}

?>

?php

www.bkjia.comtrueTechArticle下面贴处理的源代码: 复制代码 代码如下: php require_once(“gifencoder.php”); //载入编码 文件 $gif = new GIFEncoder(); //实例化gif解码对象 $gif-load(“t…

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