Unit 1: PCL Emulation
SATO D512 PCL Programming Manual Page 1-35
ADAPTIVE COMPRESSION
Adaptive compression allows the combined use of compression methods
0 through 3 (Uncoded, Run-Length Encoded, TIFF, and Delta Row). It also
allows the printing of empty rows (all zeros) or duplicate rows.
The Transfer Raster Data command size includes all rows (scan
lines).
Scan Mode and SizeH,L are three-byte primary control strings:
CountH and CountL.
Example:
ESC*p300x1500Y |Move cursor to 1" x 5"
ESC*b5M |Set the compression to Adaptive
Compression
ESC*b29W |Raster Data: 29 bytes follow
'03 0009'x 'E0FFFFFFFFFFFFFFFF'x |Delta Row: 8 at 0:
'FFFFFFFFFFFFFFFFh'x
'01 0006'x '0080 FB00 0001'x |Run Length: 1:'80'x, 6x'00'x, 1:'01'x
'05 0035'x |Duplicate rows: 61 times'02 0002'x
'F9FF 'x |TIFF: 8x'FF'x
ESC*rB |End graphics
Table 1-25: Adaptive Compression Control Strings
Scan Mode CountH,CountL Data
0 Data sizeH,L Uncoded raster scan data
1 Data sizeH,L Size of Run-length encoded data (high,low)
2 Data sizeH,L Size of Tagged Image File Format (TIFF) data (high,low)
3 Data SizeH,L Size of Delta Row data (high,low)
4 NumberH,L of empty rows None
5 NumberH,L of duplicate
rows
None
254 Data SizeH,L TIFF word
255 Data SizeH,L TIFF double-word