266 lines
9.3 KiB
PHP
266 lines
9.3 KiB
PHP
<?php namespace ProcessWire;
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: ISEAG_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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:: * Enhanced version by xurei (https://github.com/xurei/GIFDecoder_optimized)
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::
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:: Try on-line GIFBuilder Form demo based on ISEAG_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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LICENSE:
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All versions specify Apache 2.0 license (2018-01-31):
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https://github.com/jacoka/GIFDecoder/blob/master/LICENSE
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https://github.com/xurei/GIFDecoder_optimized/blob/master/LICENSE
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Namespace added by Horst for ProcessWire
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*/
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class ISEAG_GIFEncoder {
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var $GIF = "GIF89a"; /* GIF header 6 bytes */
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var $VER = "ISEAG_GIFEncoder V2.05"; /* Encoder version */
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var $BUF = Array ( );
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var $LOP = 0;
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var $DIS = 2;
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//var $COL = -1;
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var $TRANSPARENT_R = -1;
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var $TRANSPARENT_G = -1;
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var $TRANSPARENT_B = -1;
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var $IMG = -1;
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var $ERR = Array (
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'ERR00'=>"Does not supported function for only one image!",
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'ERR01'=>"Source is not a GIF image!",
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'ERR02'=>"Unintelligible flag ",
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'ERR03'=>"Does not make animation from animated GIF source",
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);
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/*
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:::::::::::::::::::::::::::::::::::::::::::::::::::
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::
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:: ISEAG_GIFEncoder...
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::
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*/
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function __construct (
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$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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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 ) ? $GIF_lop : 0;
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$GIF_dis_out = $GIF_dis;
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foreach ($GIF_dis_out as &$dis)
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{
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$dis = ( $dis > -1 ) ? ( ( $dis < 3 ) ? $dis : 3 ) : 2;
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}
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$this->DIS = $GIF_dis_out;//( $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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if ( $GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1 )
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{
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$this->TRANSPARENT_R = $GIF_red & 0xFF;
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$this->TRANSPARENT_G = $GIF_grn & 0xFF;
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$this->TRANSPARENT_B = $GIF_blu & 0xFF;
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}
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//Filling in the buffer
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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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ISEAG_GIFEncoder::GIFAddHeader ( );
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for ( $i = 0; $i < count ( $this->BUF ); $i++ ) {
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ISEAG_GIFEncoder::GIFAddFrames ( $i, $GIF_dly[$i] );
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}
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ISEAG_GIFEncoder::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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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" . ISEAG_GIFEncoder::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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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 ( ( $this->DIS[$i] << 2 ) + 0 ) .
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chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . "\x0\x0";
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$Locals_img = '';
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if ( $this->TRANSPARENT_R > -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->TRANSPARENT_R &&
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ord ( $Locals_rgb [ 3 * $j + 1 ] ) == $this->TRANSPARENT_G &&
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ord ( $Locals_rgb [ 3 * $j + 2 ] ) == $this->TRANSPARENT_B )
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{
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$Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS[$i] << 2 ) ) .
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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_ext[3] = chr((ord($Locals_ext[3]) & 0xFE) | (ord($Locals_tmp[3]) & 0x01));
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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 ( ISEAG_GIFEncoder::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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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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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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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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function GetAnimation ( ) {
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return ( $this->GIF );
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}
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}
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