ZPL commands

^GF with :Z64 · Compressed Graphic Data

^GF with Z64 encoding: the bitmap is compressed with zlib deflate , Base64-encoded and sent with a checksum. There is no ^GZ command in ZPL.

^GF with Z64 encoding: the bitmap is compressed with zlib (deflate), Base64-encoded and sent with a checksum. There is no ^GZ command in ZPL.

Parameters

^GFA,b,c,d,:Z64:data:crc - b, c: Byte count of the uncompressed graphic (bytes per row × rows)
^GFA,b,c,d,:Z64:data:crc - d: Bytes per row (width in dots ÷ 8, rounded up)
^GFA,b,c,d,:Z64:data:crc - :Z64: - Marker for zlib-compressed, Base64-encoded data (:B64: = Base64 without compression)
^GFA,b,c,d,:Z64:data:crc - data: Base64 text of the compressed bitmap
^GFA,b,c,d,:Z64:data:crc - crc: CRC-16 of the Base64 data as 4 hex digits

Example

^XA
^FO50,50^GFA,1280,1280,40,:Z64:<base64>:<crc>^FS
^XZ

ZPL preview: ^GF with :Z64 · Compressed Graphic Data

Tip

Z64 pays off especially for large logos. Graphics from the zplCloud image import already contain fully encoded ^GFA data - for formats A, B and C see ^GF.