SATO D512 PCL - page 40

Unit 1: PCL Emulation

Page 1-36 SATO D512 PCL Programming Manual

ZLIB

Zlib is a generic compression method. It refers to a standard for compression

as well as the library that implements the standard.

The zlib compression method uses the deflate algorithm. This same algorithm

is used by more widely known compression utilities such as PKZIP and GZIP.

Compressed data is a series of variably-sized blocks. An encoder determines

how to break the data into blocks and finds the best compression method to

use for each block.

An encoder works based on the following principles. The encoder creates a

dictionary containing different characters in a set of data. Short strings of bits

represent more commonly occurring characters, and long strings of bits

represent less frequently used characters. A probability tree determines

which characters are frequently used. Repeated patterns in a string of

characters are identified and stored, so the string doesn’t have to be stored

multiple times.

A three-bit zlib header is added to the beginning of a block to describe the

type of compression used and indicates whether the block is a final block.

Other information in the header includes checksums, compression algorithm

used, and the level of compression. In compression all checksums are set to

zero and in decompression the checksums are ignored.

The memory required for zlib compression and decompression is

independent of the size of the data to be compressed or decompressed.

The number 999 does not conflict with other compression types, so it is used

to represent zlib compression. See “Raster Compression Mode” in this

section for more information.

Contents

Main SATO America, Inc. WARNING Table of Contents Page 1PCL EMULATION PCL EMULATION SELECTING PCL EMULATION PAGE FORMATTING FONT AND SYMBOL SET SUPPORT Page Page COMMAND STRUCTURE Page SATO D512 PCL Programming Manual Page 1-9 PCL EMULATION COMMANDS Page 1-10 SATO D512 PCL Programming Manual Table 1-6: Page Control Table 1-5: Job Control (continued) SATO D512 PCL Programming Manual Page 1-11 Table 1-6: Page Control (continued) Page 1-12 SATO D512 PCL Programming Manual Table 1-6: Page Control (continued) SATO D512 PCL Programming Manual Page 1-13 Table 1-7: Cursor Positioning Page 1-14 SATO D512 PCL Programming Manual SATO D512 PCL Programming Manual Page 1-15 Table 1-8: Font Selection (continued) Page 1-16 SATO D512 PCL Programming Manual Table 1-9: User-Defined Symbol Set Table 1-8: Font Selection (continued) SATO D512 PCL Programming Manual Page 1-17 Table 1-10: Font Creation Table 1-11: Macros Page 1-18 SATO D512 PCL Programming Manual Table 1-12: Print Model SATO D512 PCL Programming Manual Page 1-19 Table 1-13: User-Defined Pattern Table 1-14: Rectangular Area Fill Graphics Page 1-20 SATO D512 PCL Programming Manual Table 1-14: Rectangular Area Fill Graphics (continued) SATO D512 PCL Programming Manual Page 1-21 Table 1-15: Raster Graphics and ignored. Page 1-22 SATO D512 PCL Programming Manual Table 1-15: Raster Graphics (continued) SATO D512 PCL Programming Manual Page 1-23 Table 1-15: Raster Graphics (continued) Page 1-24 SATO D512 PCL Programming Manual Table 1-16: Status Readback SATO D512 PCL Programming Manual Page 1-25 Table 1-17: Picture Frame Table 1-18: Miscellaneous Commands Table 1-18: Miscellaneous Commands (continued) SATO D512 PCL Programming Manual Page 1-27 GL/2 COMMANDS Table 1-19: Configuration Group Table 1-20: Vector Group Page 1-28 SATO D512 PCL Programming Manual Table 1-21: Polygon Group Table 1-22: Character Group SATO D512 PCL Programming Manual Page 1-29 Table 1-23: Line and Fill Attributes Group Table 1-24: Miscellaneous Group Table 1-22: Character Group (continued) RASTER IMAGE GRAPHICS Page Page Page Page Page Page Page MACROS Page PRINTER JOB LANGUAGE PJL COMMAND NOTATION KERNEL COMMANDS UNIVERSAL EXIT LANGUAGE Command ENTER LANGUAGE Command COMMENT Command JOB SEPARATION COMMANDS JOB Command Page EOJ Command ENVIRONMENT COMMANDS AND VARIABLES DEFAULT Command SET Command INITIALIZE Command Unit 2: Printer Job Language Page 2-10 SATO D512 PCL Programming Manual RESET Command @PJL RESET[<CR>]<LF> Unit 2: Printer Job Language SATO D512 PCL Programming Manual Page 2-11 Table 2-2: PJL Variables (continued) STATUS READBACK COMMANDS DINQUIRE Command ECHO Command INFO Command INQUIRE Command USTATUS Command Page STATUS MESSAGE FORMAT Page Page 3-2 SATO D512 PCL Programming Manual PCL SUPPORT SATO D512 PCL Programming Manual Page 3-3 Page 3-4 SATO D512 PCL Programming Manual SATO D512 PCL Programming Manual Page 3-5 Table2 lists GL/2 commands and identifies the printers that support them. Page 3-6 SATO D512 PCL Programming Manual Table 3-2: GL/2 Commands SATO D512 PCL Programming Manual Page 3-7 Table 3-2: GL/2 Commands (continued) Page 3-8 SATO D512 PCL Programming Manual Table 3-2: GL/2 Commands (continued) Page Page 4-2 SATO D512 PCL Programming Manual PRINTER JOB LANGUAGE SUPPORT SATO D512 PCL Programming Manual Page 4-3 Table 4-1: PJL Variables (continued) Page 4-4 SATO D512 PCL Programming Manual Table 4-2: Common Variables for PCL Emulation Table 4-3: Common Variables for PostScript Emulation Table 4-1: PJL Variables (continued) SATO D512 PCL Programming Manual Page 4-5 Table 4-4: Status Readback Commands Table 4-5: USTATUS Unsolicited Status Variables Table 4-6: Device Attendance Messages Page Page Page 5-2 SATO D512 PCL Programming Manual BAR CODE COMMANDS Table 5-1: PCL Emulation Escape Sequences SATO D512 PCL Programming Manual Page 5-3 Table 5-2: PCL Emulation Parameter List Page 5-4 SATO D512 PCL Programming Manual Table 5-2: PCL Emulation Parameter List (continued) TWO-DIMENSIONAL BAR CODES Page Page Page Page SETTING THE PRINTER TO SBPL LANGUAGE Command to set SBPL Language PCL Language Set Command SETTING THE PRINTER TO PCL LANGUAGE Command to set PCL Language ESC+RN ESC+RNESC+R Page Page Page SATO GROUP OF COMPANIES International Headquarters SATO INTERNATIONAL PTE. LTD. Asia Pacific & Oceania Region SATO INTERNATIONAL ASIA PACIFIC PTE. LTD. SATO ASIA PACIFIC PTE. LTD.