photoshop_irb.php

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        array_splice($jpeg_header_data, $i + 1 , 0, "" );
        $jpeg_header_data[$i + 1] =  array( "SegType" => 0xED,
                                        "SegName" => "APP13",
                                        "SegDesc" => $GLOBALS[ "JPEG_Segment_Descriptions" ][ 0xED ],
                                        "SegData" => "Photoshop 3.0\x00" . $packed_IRB_data );

        return $jpeg_header_data;
}

/******************************************************************************
* End of Function:     put_Photoshop_IRB
******************************************************************************/








/******************************************************************************
*
* Function:     get_Photoshop_IPTC
*
* Description:  Retrieves IPTC-NAA IIM information from within a Photoshop
*               IRB (if it is present) and returns it in an array. Uses
*               information supplied by the get_jpeg_header_data function
*
* Parameters:   Photoshop_IRB_data - an array of Photoshop IRB records, as
*                                    returned from get_Photoshop_IRB
*
* Returns:      IPTC_Data_Out - The array of IPTC-NAA IIM records
*               FALSE - if an IPTC-NAA IIM record could not be found, or if
*                       an error occured
*
******************************************************************************/

function get_Photoshop_IPTC( $Photoshop_IRB_data )
{

        // Change: Initialise array correctly, as of revision 1.10
        $IPTC_Data_Out = array();

        //Cycle through the Photoshop 8BIM records looking for the IPTC-NAA record
        for( $i = 0; $i < count( $Photoshop_IRB_data ); $i++ )
        {
                // Check if each record is a IPTC record (which has id 0x0404)
                if ( $Photoshop_IRB_data[$i]['ResID']  == 0x0404 )
                {
                        // We've found an IPTC block - Decode it
                        $IPTC_Data_Out = get_IPTC( $Photoshop_IRB_data[$i]['ResData'] );
                }
        }

        // If there was no records put into the output array,
        if ( count( $IPTC_Data_Out ) == 0 )
        {
                // Then return false
                return FALSE;
        }
        else
        {
                // Otherwise return the array
                return $IPTC_Data_Out;
        }

}

/******************************************************************************
* End of Function:     get_Photoshop_IPTC
******************************************************************************/






/******************************************************************************
*
* Function:     put_Photoshop_IPTC
*
* Description:  Inserts a new IPTC-NAA IIM resource into a Photoshop
*               IRB, or replaces an the existing resource if one is present.
*               Uses information supplied by the get_Photoshop_IRB function
*
* Parameters:   Photoshop_IRB_data - an array of Photoshop IRB records, as
*                                    returned from get_Photoshop_IRB, into
*                                    which the IPTC-NAA IIM record will be inserted
*               new_IPTC_block - an array of IPTC-NAA records in the same format
*                                as those returned by get_Photoshop_IPTC
*
* Returns:      Photoshop_IRB_data - The Photoshop IRB array with the
*                                     IPTC-NAA IIM resource inserted
*
******************************************************************************/

function put_Photoshop_IPTC( $Photoshop_IRB_data, $new_IPTC_block )
{
        $iptc_block_pos = -1;

        //Cycle through the 8BIM records looking for the IPTC-NAA record
        for( $i = 0; $i < count( $Photoshop_IRB_data ); $i++ )
        {
                // Check if each record is a IPTC record (which has id 0x0404)
                if ( $Photoshop_IRB_data[$i]['ResID']  == 0x0404 )
                {
                        // We've found an IPTC block - save the position
                        $iptc_block_pos = $i;
                }
        }

        // If no IPTC block was found, create a new one
        if ( $iptc_block_pos == -1 )
        {
                // New block position will be at the end of the array
                $iptc_block_pos = count( $Photoshop_IRB_data );
        }


        // Write the new IRB resource to the Photoshop IRB array with no data
        $Photoshop_IRB_data[$iptc_block_pos] = array(   "ResID" =>   0x0404,
                                                        "ResName" => $GLOBALS['Photoshop_ID_Names'][ 0x0404 ],
                                                        "ResDesc" => $GLOBALS[ "Photoshop_ID_Descriptions" ][ 0x0404 ],
                                                        "ResEmbeddedName" => "\x00\x00",
                                                        "ResData" => put_IPTC( $new_IPTC_block ) );


        // Return the modified IRB
        return $Photoshop_IRB_data;
}

/******************************************************************************
* End of Function:     put_Photoshop_IPTC
******************************************************************************/








/******************************************************************************
*
* Function:     Interpret_IRB_to_HTML
*
* Description:  Generates html showing the information contained in a Photoshop
*               IRB data array, as retrieved with get_Photoshop_IRB, including
*               any IPTC-NAA IIM records found.
*
*               Please note that the following resource numbers are not currently
*               decoded: ( Many of these do not apply to JPEG images)
*               0x03E9, 0x03EE, 0x03EF, 0x03F0, 0x03F1, 0x03F2, 0x03F6, 0x03F9,
*               0x03FA, 0x03FB, 0x03FD, 0x03FE, 0x0400, 0x0401, 0x0402, 0x0405,
*               0x040E, 0x040F, 0x0410, 0x0412, 0x0413, 0x0415, 0x0416, 0x0417,
*               0x041B, 0x041C, 0x041D, 0x0BB7
*
*               ( Also these Obsolete resource numbers)
*               0x03E8, 0x03EB, 0x03FC, 0x03FF, 0x0403
*
*
* Parameters:   IRB_array - a Photoshop IRB data array as from get_Photoshop_IRB
*               filename - the name of the JPEG file being processed ( used
*                          by the script which displays the Photoshop thumbnail)
*
*
* Returns:      output_str - the HTML string
*
******************************************************************************/

function Interpret_IRB_to_HTML( $IRB_array, $filename )
{
        // Create a string to receive the HTML
        $output_str = "";

        // Check if the Photoshop IRB array is valid
        if ( $IRB_array !== FALSE )
        {

                // Create another string to receive secondary HTML to be appended at the end
                $secondary_output_str = "";

                // Add the Heading to the HTML
                $output_str .= "<h2 class=\"Photoshop_Main_Heading\">Contains Photoshop Information Resource Block (IRB)</h2>";

                // Add Table to the HTML
                $output_str .= "<table class=\"Photoshop_Table\" border=1>\n";

                // Cycle through each of the Photoshop IRB records, creating HTML for each
                foreach( $IRB_array as $IRB_Resource )
                {
                        // Check if the entry is a known Photoshop IRB resource

                        // Get the Name of the Resource
                        if ( array_key_exists( $IRB_Resource['ResID'], $GLOBALS[ "Photoshop_ID_Names" ] ) )
                        {
                                $Resource_Name = $GLOBALS['Photoshop_ID_Names'][ $IRB_Resource['ResID'] ];
                        }
                        else
                        {
                                // Change: Added check for $GLOBALS['HIDE_UNKNOWN_TAGS'] to allow hiding of unknown resources as of 1.11
                                if ( $GLOBALS['HIDE_UNKNOWN_TAGS'] == TRUE )
                                {
                                        continue;
                                }
                                else
                                {
                                        // Unknown Resource - Make appropriate name
                                        $Resource_Name = "Unknown Resource (". $IRB_Resource['ResID'] .")";
                                }
                        }

                        // Add HTML for the resource as appropriate
                        switch ( $IRB_Resource['ResID'] )
                        {

                                case 0x0404 : // IPTC-NAA IIM Record
                                        $secondary_output_str .= Interpret_IPTC_to_HTML( get_IPTC( $IRB_Resource['ResData'] ) );
                                        break;

                                case 0x040B : // URL
                                        $output_str .= "<tr class=\"Photoshop_Table_Row\"><td class=\"Photoshop_Caption_Cell\">$Resource_Name</td><td class=\"Photoshop_Value_Cell\"><a href=\"" . $IRB_Resource['ResData'] . "\">" . htmlentities( $IRB_Resource['ResData'] ) ."</a></td></tr>\n";
                                        break;

                                case 0x040A : // Copyright Marked
                                        if ( hexdec( bin2hex( $IRB_Resource['ResData'] ) ) == 1 )
                                        {