Photoshop IRB & IPTC-NAA IIM Function Reference
The Photoshop Image Resource Block (IRB) resides in the "App 13" segment of a JPEG image. It contains photoshop information but can also contain the IPTC-NAA IIM record. (International Press Telecommunications Council, Newspaper Association of America, Information Interchange Model)
| Function: | get_Photoshop_IRB | |
| Description: | Retrieves the Photoshop Information Resource Block (IRB) information from an App13 JPEG segment and returns it as an array. This may include IPTC-NAA IIM Information. Uses information supplied by the get_jpeg_header_data function | |
| Parameters: | jpeg_header_data | a JPEG header data array in the same format as from get_jpeg_header_data |
| Returns: | IRBdata | The array of Photoshop IRB records |
| FALSE | if an APP 13 Photoshop IRB segment could not be found, or if an error occured | |
| Function: | put_Photoshop_IRB | |
| Description: | Adds or modifies the Photoshop Information Resource Block (IRB) information from an App13 JPEG segment. If a Photoshop IRB already exists, it is replaced, otherwise a new one is inserted, using the supplied data. Uses information supplied by the get_jpeg_header_data function | |
| Parameters: | jpeg_header_data | a JPEG header data array in the same format as from get_jpeg_header_data |
| new_IRB_data | an array of the data to be stored in the Photoshop IRB segment. Should be in the same format as received from get_Photoshop_IRB | |
| Returns: | jpeg_header_data | the JPEG header data array with the Photoshop IRB added. |
| FALSE | if an error occured | |
| 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: | 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: | 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. Note: 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_IPTC_to_HTML | |
| Description: | Generates html detailing the contents a IPTC-NAA IIM array which was retrieved with the get_Photoshop_IPTC function | |
| Parameters: | IPTC_info | the IPTC-NAA IIM array,as read from get_IPTC |
| Returns: | OutputStr | A string containing the HTML |