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- PCLCOMP(1) PCLCOMP(1)
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- NAME
- pclcomp - Compress PCL graphics files.
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- SYNOPSIS
- pclcomp [ -0123drsvz ] [ -n num ] [ inputfile [ outputfile ]]
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- DESCRIPTION
- Pclcomp compresses (or decompresses) HP-PCL (Printer Control
- Language) graphics data. The supported compression modes
- are 0 (uncompressed), 1, 2 and 3. Pclcomp will read files
- using any of the modes 0 through 3, and will output using
- the modes which will give the best compression. This
- compressed version of the file may be sent directly to a PCL
- compatible printer, thus reducing I/O bandwidth. Pictures
- may also be saved in compressed form, reducing disk usage.
- In addition, PCL "imaging" files for the PaintJet XL are
- also supported.
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- The options to pclcomp control the compression modes. By
- default, pclcomp will use all modes it knows about, but the
- user may restrict which output modes it uses by specifying
- them on the command line with the -0, -1, -2 and -3 options.
- To decompress a file, simply specify -0 as the only mode to
- use for output. Mode 0 ( -0 ) should always be allowed
- since modes 1, 2 and 3 cannot be guaranteed to be better
- than mode 0 for all types of pictures.
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- The -z option disables the zero "strip" feature. Since most
- printers do zero "filling", pclcomp, by default, "strips"
- the trailing zeros of each row (or plane) of data. Some
- printers or programs may require that zero "stripping" be
- disabled.
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- By default, pclcomp expects the input raster width to be
- 2400 pixels (8" at 300 dpi), and if it is different (e.g.
- PaintJet), then the raster width should be specified by the
- Source Raster Width escape sequence <esc*r#S>. However, many
- applications do not set the width and assume a default,
- therefore, the user may use the -n option to pclcomp to
- specify a new default raster width. For PaintJet (8" at 180
- dpi), the number should be 1440. If the PCL file contains
- the Source Raster Width escape sequence, it will override
- this default. If pclcomp thinks that more data is coming in
- than the specified width, it will generate a warning, and
- continue processing (and perhaps truncating) data.
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- The -r option causes pclcomp to append a reset sequence
- (<esc>E) to the end of the job.
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- Use the -d option to pclcomp if the output is to be sent to
- a DeskJet printer.
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- - 1 - Formatted: April 30, 1991
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- PCLCOMP(1) PCLCOMP(1)
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- Some applications erroneously send <esc>*rB and <esc>*rA
- sequences between every row of graphics data. The -s option
- to pclcomp will "strip" all <esc>*rB sequences, and all
- <esc>*rA sequences after the first occurrence of this
- sequence. In addition, text and control characters residing
- between <esc>*rA and <esc>*rB sequences will be discarded.
- While this will work well for many jobs, it may have
- problems on multi-page or complex jobs.
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- The -v option simply gives statistics to stderr about which
- compression modes were used.
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- EXAMPLES
- To compress a PCL file for LaserJet III, use:
- pclcomp infile outfile
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- To compress a PCL file for the PaintJet (A size page at 180 dpi), use:
- pclcomp -01 -n 1440 infile outfile
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- To compress a PCL file for DeskJet, use:
- pclcomp -d012 infile outfile
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- To fully decompress a PCL file, use:
- pclcomp -0z < infile > outfile
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- WARNINGS
- The -z option can cause the output to be larger than the
- input.
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- The -s option is useful, but it can cause erroneous output.
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- AUTHOR
- Tony Parkhurst, Hewlett-Packard, San Diego Division
- (tony@sdd.hp.com)
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- - 2 - Formatted: April 30, 1991
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