当前位置: 首页 > 工具软件 > GIFEncoder > 使用案例 >

gif用到php_PHP使用GIFEncoder类处理gif图片实例

何禄
2023-12-01

"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 )!",$this->ERR [ 'ERR02' ],$GIF_mod );

exit ( 0 );

}

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

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

exit ( 0 );

}

break;

case ";":

$k = FALSE;

break;

}

}

}

GIFEncoder::GIFAddHeader ( );

for ( $i = 0; $i < count ( $this->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 << ( 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" . GIFEncoder::GIFWord ( $this->LOP ) . "/0";

}

}

/*

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

::

:: GIFAddFrames...

::

*/

function GIFAddFrames ( $i,$d ) {

$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 ],

3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) ) );

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

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 >> 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,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 );

}

}

?>

 类似资料: