Command strings of rPdfOptAddCommandStr

The function rPdfOptAddCommandStr of RecPDF Module uses command strings for setting up the optimization process. The below lists show the possible command strings.

Note:

The command strings are case-sensitive.

The structure of a command string:

    CommandStr[:Specifier[:Exact Value]]

The below lists show the CommandStr in bold. Sublists show the Specifiers if any, and the possible Exact Values are also shown where they can be used.

Basic functions

• XRef - Compress the XRef structure.
• CompressObjects - Compress the uncompressed data objects.
• ZIPStreams - Use Zip compression instead of LZW.
• Linearize - Optimize for fast web view.

Set the version of the PDF

• PDF13 - Convert to 1.3
• PDF14 - Convert to 1.4
• PDF15 - Convert to 1.5
• PDF16 - Convert to 1.6
• PDF17 - Convert to 1.7
• PDFA_1A - Convert to PDF/A-1a
• PDFA_1B - Convert to PDF/A-1b
• PDFA_2A - Convert to PDF/A-2a
• PDFA_2B - Convert to PDF/A-2b
• PDFA_2U - Convert to PDF/A-2u
• PDFA_3A - Convert to PDF/A-3a
• PDFA_3B - Convert to PDF/A-3b
• PDFA_3U - Convert to PDF/A-3u

Tag handling

• RemoveTags - Remove the tags from the PDF.

Font handling

• SubsetFonts - Subset all embedded fonts.

Security

• NoSec - Remove security.
• Sec40 - Protect with 40 bit RC4 encryption.
• Sec128 - Protect with 128 bit RC4 encryption.
• Sec128AES - Protect with 128 bit AES encryption.
• Sec256 - Protect with 256 bit AES encryption.
• OwnerPassword - Set the owner password. Separate the password with ':'! E.g.: OwnerPassword:123A24d
• Restrictions - Set the security restrictions. Separate the integer value of the combined restriction flags with ':'! Use the flags of RPDF_RESTRICTIONS. E.g. for disabling printing and changing: Restrictions:8448

Image compression

• BWImages - Set the compression of the black and white images. Possible specifiers:
  • CCITTFax - Group4 compression.
  • JBIG2 - JBIG2 compression. Possible exact values: 1...100
    • E.g.: BWImages:JBIG2:80

• GrayImages - Set the compression of the grayscale images. Possible specifiers:
  • JPEG - JPEG compression. Possible exact values: 1...100
  • JPEG2000 - JPEG2000 compression. Possible exact values: 1...100
  • ZIP - Zip compression.

• ColorImages - Set the compression of the color images. Possible specifiers:
  • JPEG - JPEG compression. Possible exact values: 1...100
  • JPEG2000 - JPEG2000 compression. Possible exact values: 1...100
  • ZIP - Zip compression.

Colorspace conversions

• ImagesToBW - Convert all images to black and white.
• ImagesToGray - Convert color images to grayscale.
• ConvertToGray - Convert all PDF content to grayscale.

Metadata handling

• FixMetadata - Fix metadata errors. Remove incorrect metadata entries.
• MetaAdd - Add metadata entry.
  • E.g.: MetaAdd:pdf:Producer:SomeApp
• MetaRemove - Remove metadata entry.
  • E.g.: MetaRemove:pdf:Keywords
• MetaReplace - Replace metadata entry.