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f Function: Interpret_IRB_to_HTML ******************************************************************************/ /****************************************************************************** * * INTERNAL FUNCTIONS * ******************************************************************************/ /****************************************************************************** * * Internal Function: Interpret_Transfer_Function * * Description: Used by Interpret_IRB_to_HTML to interpret Color transfer functions * for Photoshop IRB resource 0x03F8. Converts the transfer function * information to a human readable version. * * Parameters: Transfer_Function_Binary - a 28 byte Ink curves structure string * * Returns: output_str - the text string containing the transfer function * information * ******************************************************************************/ function Interpret_Transfer_Function( $Transfer_Function_Binary ) { // Unpack the Transfer function information $Trans_vals = unpack ( "n13Curve/nOverride", $Transfer_Function_Binary ); $output_str = "Transfer Function Points: "; // Cycle through each of the Transfer function array values foreach ( $Trans_vals as $Key => $val ) { // Check if the value should be negative if ($val > 32768 ) { // Value should be negative - make it so $val = $val - 65536; } // Check that the Override item is not getting in this list, and // that the value is not -1, which means ignored if ( ( $Key != "Override" ) && ( $val != -1 ) ) { // This is a valid transfer function point, output it $output_str .= $val/10 . "%, "; } } // Output the override info if ( $Trans_vals['Override'] == 0 ) { $output_str .= "\nOverride: Let printer supply curve"; } else { $output_str .= "\nOverride: Override printer’s default transfer curve"; } // Return the result return $output_str; } /****************************************************************************** * End of Function: Interpret_Transfer_Function ******************************************************************************/ /****************************************************************************** * * Internal Function: Interpret_Halftone * * Description: Used by Interpret_IRB_to_HTML to interpret Color halftoning information * for Photoshop IRB resource 0x03F5. Converts the halftoning info * to a human readable version. * * Parameters: Transfer_Function_Binary - a 18 byte Halftone screen parameter & structure string * * Returns: output_str - the text string containing the transfer function * information * ******************************************************************************/ function Interpret_Halftone( $Halftone_Binary ) { // Create a string to receive the output $output_str = ""; // Unpack the binary data into an array $HalftoneInfo = unpack( "nFreqVal_int/nFreqVal_dec/nFreqScale/nAngle_int/nAngle_dec/nShapeCode/NMisc/CAccurate/CDefault", $Halftone_Binary ); // Interpret Ink Screen Frequency $output_str .= "Ink Screen Frequency = " . ($HalftoneInfo['FreqVal_int'] + $HalftoneInfo['FreqVal_dec']/65536) . " lines per Inch\n"; if ( $HalftoneInfo['FreqScale'] == 1 ) { $output_str .= "Display units for Ink Screen Frequency = Inches\n"; } else { $output_str .= "Display units for Ink Screen Frequency = Centimetres\n"; } // Interpret Angle for screen $output_str .= "Angle for screen = " . ($HalftoneInfo['Angle_int'] + $HalftoneInfo['Angle_dec']/65536) . " degrees\n"; // Interpret Shape of Halftone Dots if ($HalftoneInfo['ShapeCode'] > 32768 ) { $HalftoneInfo['ShapeCode'] = $HalftoneInfo['ShapeCode'] - 65536; } if ( $HalftoneInfo['ShapeCode'] == 0 ) { $output_str .= "Shape of Halftone Dots = Round\n"; } elseif ( $HalftoneInfo['ShapeCode'] == 1 ) { $output_str .= "Shape of Halftone Dots = Ellipse\n"; } elseif ( $HalftoneInfo['ShapeCode'] == 2 ) { $output_str .= "Shape of Halftone Dots = Line\n"; } elseif ( $HalftoneInfo['ShapeCode'] == 3 ) { $output_str .= "Shape of Halftone Dots = Square\n"; } elseif ( $HalftoneInfo['ShapeCode'] == 4 ) { $output_str .= "Shape of Halftone Dots = Cross\n"; } elseif ( $HalftoneInfo['ShapeCode'] == 6 ) { $output_str .= "Shape of Halftone Dots = Diamond\n"; } else { $output_str .= "Shape of Halftone Dots = Unknown shape (" . $HalftoneInfo['ShapeCode'] . ")\n"; } // Interpret Accurate Screens if ( $HalftoneInfo['Accurate'] == 1 ) { $output_str .= "Use Accurate Screens Selected\n"; } else { $output_str .= "Use Other (not Accurate) Screens Selected\n"; } // Interpret Printer Default Screens if ( $HalftoneInfo['Default'] == 1 ) { $output_str .= "Use printer’s default screens\n"; } else { $output_str .= "Use Other (not Printer Default) Screens Selected\n"; } // Return Text return $output_str; } /****************************************************************************** * End of Global Variable: Interpret_Halftone ******************************************************************************/ /****************************************************************************** * Global Variable: Photoshop_ID_Names * * Contents: The Names of the Photoshop IRB resources, indexed by their * resource number * ******************************************************************************/ $GLOBALS[ "Photoshop_ID_Names" ] = array( 0x03E8 => "Number of channels, rows, columns, depth, and mode. (Obsolete)", 0x03E9 => "Macintosh print manager info ", 0x03EB => "Indexed color table (Obsolete)", 0x03ED => "Resolution Info", 0x03EE => "Alpha Channel Names", 0x03EF => "Display Info", 0x03F0 => "Caption String", 0x03F1 => "Border information", 0x03F2 => "Background color", 0x03F3 => "Print flags", 0x03F4 => "Grayscale and multichannel halftoning information", 0x03F5 => "Color halftoning information", 0x03F6 => "Duotone halftoning information", 0x03F7 => "Grayscale and multichannel transfer function", 0x03F8 => "Color transfer functions", 0x03F9 => "Duotone transfer functions", 0x03FA => "Duotone image information", 0x03FB => "Black and white values", 0x03FC => "Obsolete Resource.", 0x03FD => "EPS options", 0x03FE => "Quick Mask information", 0x03FF => "Obsolete Resource", 0x0400 => "Layer state information", 0x0401 => "Working path (not saved)", 0x0402 => "Layers group information", 0x0403 => "Obsolete Resource", 0x0404 => "IPTC-NAA record", 0x0405 => "Raw Format Image mode", 0x0406 => "JPEG quality", 0x0408 => "Grid and guides information", 0x0409 => "Thumbnail resource", 0x040A => "Copyright flag", 0x040B => "URL", 0x040C => "Thumbnail resource", 0x040D => "Global Angle", 0x040E => "Color samplers resource", 0x040F => "ICC Profile", 0x0410 => "Watermark", 0x0411 => "ICC Untagged", 0x0412 => "Effects visible", 0x0413 => "Spot Halftone", 0x0414 => "Document Specific IDs", 0x0415 => "Unicode Alpha Names", 0x0416 => "Indexed Color Table Count", 0x0417 => "Tansparent Index. Index of transparent color, if any.", 0x0419 => "Global Altitude", 0x041A => "Slices", 0x041B => "Workflow URL", 0x041C => "Jump To XPEP", 0x041D => "Alpha Identifiers", 0x041E => "URL List", 0x0421 => "Version Info", 0x0BB7 => "Name of clipping path.", 0x2710 => "Print flags information" ); /****************************************************************************** * End of Global Variable: Photoshop_ID_Names ******************************************************************************/ /****************************************************************************** * Global Variable: Photoshop_ID_Descriptions * * Contents: The Descriptions of the Photoshop IRB resources, indexed by their * resource number * ******************************************************************************/ $GLOBALS[ "Photoshop_ID_Descriptions" ] = array( 0x03E8 => "Obsolete—Photoshop 2.0 only. number of channels, rows, columns, depth, and mode.", 0x03E9 => "Optional. Macintosh print manager print info record.", 0x03EB => "Obsolete—Photoshop 2.0 only. Contains the indexed color table.", 0x03ED => "ResolutionInfo structure. See Appendix A in Photoshop SDK Guide.pdf", 0x03EE => "Names of the alpha channels as a series of Pascal strings.", 0x03EF => "DisplayInfo structure. See Appendix A in Photoshop SDK Guide.pdf", 0x03F0 => "Optional. The caption as a Pascal string.", 0x03F1 => "Border information. border width, border units", 0x03F2 => "Background color.", 0x03F3 => "Print flags. labels, crop marks, color bars, registration marks, negative, flip, interpolate, caption.", 0x03F4 => "Grayscale and multichannel halftoning information.", 0x03F5 => "Color halftoning information.", 0x03F6 => "Duotone halftoning information.", 0x03F7 => "Grayscale and multichannel transfer function.", 0x03F8 => "Color transfer functions.", 0x03F9 => "Duotone transfer functions.", 0x03FA => "Duotone image information.", 0x03FB => "Effective black and white values for the dot range.", 0x03FC => "Obsolete Resource.", 0x03FD => "EPS options.", 0x03FE => "Quick Mask information. Quick Mask channel ID, Mask initially empty.", 0x03FF => "Obsolete Resource.", 0x0400 => "Layer state information. Index of target layer.", 0x0401 => "Working path (not saved).", 0x0402 => "Layers group information. Group ID for the dragging groups. Layers in a group have the same group ID.", 0x0403 => "Obsolete Resource.", 0x0404 => "IPTC-NAA record. This contains the File Info... information. See the IIMV4.pdf document.", 0x0405 => "Image mode for raw format files.", 0x0406 => "JPEG quality. Private.", 0x0408 => "Grid and guides information.", 0x0409 => "Thumbnail resource.", 0x040A => "Copyright flag. Boolean indicating whether image is copyrighted. Can be set via Property suite or by user in File Info...", 0x040B => "URL. Handle of a text string with uniform resource locator. Can be set via Property suite or by user in File Info...", 0x040C => "Thumbnail resource.", 0x040D => "Global Angle. Global lighting angle for effects layer.", 0x040E => "Color samplers resource.", 0x040F => "ICC Profile. The raw bytes of an ICC format profile, see the ICC34.pdf and ICC34.h files from the Internation Color Consortium.", 0x0410 => "Watermark.", 0x0411 => "ICC Untagged. Disables any assumed profile handling when opening the file. 1 = intentionally untagged.", 0x0412 => "Effects visible. Show/hide all the effects layer.", 0x0413 => "Spot Halftone. Version, length, variable length data.", 0x0414 => "Document specific IDs for layer identification", 0x0415 => "Unicode Alpha Names. Length and the string", 0x0416 => "Indexed Color Table Count. Number of colors in table that are actually defined", 0x0417 => "Transparent Index. Index of transparent color, if any.", 0x0419 => "Global Altitude.", 0x041A => "Slices.", 0x041B => "Workflow URL. Length, string.", 0x041C => "Jump To XPEP. Major version, Minor version, Count. Table which can include: Dirty flag, Mod date.", 0x041D => "Alpha Identifiers.", 0x041E => "URL List. Count of URLs, IDs, and strings", 0x0421 => "Version Info. Version, HasRealMergedData, string of writer name, string of reader name, file version.", 0x0BB7 => "Name of clipping path.", 0x2710 => "Print flags information. Version, Center crop marks, Bleed width value, Bleed width scale." ); /****************************************************************************** * End of Global Variable: Photoshop_ID_Descriptions ******************************************************************************/ ?>