PHP Classes

File: src/types/gif/gif_encoder.php

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File: src/types/gif/gif_encoder.php
Role: Auxiliary script
Content type: text/plain
Description: Auxiliary script
Class: PHP Multi CAPTCHA
Perform CAPTCHA validation with multiple solutions
Author: By
Last change:
Date: 6 years ago
Size: 6,925 bytes
 

Contents

Class file image Download
<?php
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFEncoder Version 2.0 by L�szl� 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/
::
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
*/

namespace MultiCaptcha\Types\Gif;

Class
GifEncoder {
    var
$GIF = "GIF89a"; /* GIF header 6 bytes */
   
var $VER = "GIFEncoder V2.05"; /* 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'=>"Does not make animation from animated GIF source",
    );

   
/*
    :::::::::::::::::::::::::::::::::::::::::::::::::::
    ::
    :: GIFEncoder...
    ::
    */
   
function __construct (
                           
$GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,
                           
$GIF_red, $GIF_grn, $GIF_blu, $GIF_mod
                       
) {
        if ( !
is_array ( $GIF_src ) && ! is_array ( $GIF_dly ) ) {
           
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;
                }
            }
        }

       
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 ], 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
"!":
               
$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 );
    }
}
?>

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