Printing, about - Revision history

Sidetone: /* CUPS */

2021-06-28T05:35:22Z

CUPS

Sidetone at 05:15, 28 June 2021

2021-06-28T05:15:00Z

Sidetone: /* PostScript */

2021-06-24T17:49:22Z

PostScript

Sidetone: /* Modern CUPS specifications */

2021-06-22T17:04:52Z

Modern CUPS specifications

Sidetone: /* Modern CUPS specifications */ PCL and PostScript printer apps for legacy printers

2021-06-22T17:04:29Z

Modern CUPS specifications: PCL and PostScript printer apps for legacy printers

Sidetone: /* Comparison of print architectures */

2021-06-22T15:25:26Z

Comparison of print architectures

Sidetone: /* Modern CUPS specifications */

2021-06-21T23:52:42Z

Modern CUPS specifications

Sidetone: /* More */

2021-06-21T23:52:18Z

Sidetone: /* More */ IPP scanning

2021-06-21T23:51:56Z

More: IPP scanning

Sidetone: /* References/Further Reading */

2021-06-21T23:47:44Z

References/Further Reading

@@ Line 19: / Line 19: @@
 ===CUPS===
-The Common Unix Printing System ({{port|print/cups}}) framework supports more printers than LPR and LPRng, and it is more advanced. PCL printers are more readily supported under CUPS. CUPS can be administered on the command line, through the web interface, and through a GUI.
+The Common Unix Printing System (CUPS: {{port|print/cups}}) framework supports more printers than LPR and LPRng, and it is more advanced. PCL printers are more readily supported under CUPS. CUPS can be administered on the command line, through the web interface, and through a GUI.
 The default protocol that CUPS uses is IPP. In addition to IPP, CUPS also has protocol support for: LPD, SMB (Server Message Block) and pdl-datastream. CUPS originally started out over LPD. Samba is only needed for printing on LANs that include Windows computers.

@@ Line 2: / Line 2: @@
 ==Protocols==
-LPD (Line Printer Daemon) and IPP (Internet Printing Protocol) are printer protocols defined by IETF. LPD is described by RFC 1179 (not as a standard): it uses service port 515. IPP is defined by RFC 8011 and RFC 3510: it uses service port 631. Access control and security features are available on IPP that aren't on LPD. RFC 2569 is a memo on mapping between LPD and IPP.
+LPD (Line Printer Daemon) and IPP (Internet Printing Protocol) are printer protocols defined by IETF. LPD is described by RFC 1179 (not as a standard): it uses service port 515. IPP is a standard defined by RFC 8011 and RFC 3510: it uses service port 631. Access control and security features are available on IPP that aren't on LPD. RFC 2569 is a memo on mapping between LPD and IPP.
 pdl-datastream on service port 9100 is for proprietary printers and proprietary local network printer servers. This is often used by JetDirect products.
@@ Line 12: / Line 12: @@
 LPR is the default with FreeBSD. LPRng is a more advanced implementation of LPR. These two programs use and can alter {{man|printcap|5}}. LPR and LPRng both use the LPD protocol over service port 515.
-LPR and LPRng require manual set up through custom shell scripts of filters to convert plain text or other types of data, even between PostScript outputs to PostScript able printers. {{port|print/a2ps}} can simplify this task of converting ASCII to PostScript output. LPR's intended use was for text printing.
+LPR and LPRng require manual set up through custom shell scripts of filters to convert plain text or other types of data, even between PostScript outputs to PostScript capable printers. {{port|print/a2ps}} can simplify this task of converting ASCII to PostScript output. LPR's intended use was for text printing.
-LPRng (LPR Next Generation) is an advanced replacement for LPR. It is under the GPL and Artistic licenses. IFHP determines the format and does conversions, including by use of Ghostscript. LPRng takes care of format conversions through its filters, and of PostScript output through Ghostscript. LPRng was designed to be more secure than LPR. LPRng is found at {{port|sysutils/LPRng}}. It uses {{file|printcap}}, {{file|lpd.conf}}, and {{file|lpd.perms}} for configuration.
+LPRng (LPR Next Generation) is an advanced replacement for LPR. It is under the GPL and Artistic licenses. IFHP is a filter that determines the format and does conversions, including by use of Ghostscript. LPRng takes care of format conversions through its filters, and of PostScript output through Ghostscript. LPRng was designed to be more secure than LPR. LPRng is found at {{port|sysutils/LPRng}}. It uses {{file|printcap}}, {{file|lpd.conf}}, and {{file|lpd.perms}} for configuration.
 lprng in services ({{file|rc.conf}}) requires that lpr and cupsd be disabled. LPR and LPRng daemons can be enabled or disabled through {{file|rc.conf}}. LPR compilation in the world build can be disabled through {{man|src.conf|5}}
 ===CUPS===
-The CUPS framework supports more printers than LPR and LPRng, and it is more advanced. PCL printers are more readily supported under CUPS. CUPS can be administered on the command line, through the web interface, and through a GUI.
+The Common Unix Printing System ({{port|print/cups}}) framework supports more printers than LPR and LPRng, and it is more advanced. PCL printers are more readily supported under CUPS. CUPS can be administered on the command line, through the web interface, and through a GUI.
 The default protocol that CUPS uses is IPP. In addition to IPP, CUPS also has protocol support for: LPD, SMB (Server Message Block) and pdl-datastream. CUPS originally started out over LPD. Samba is only needed for printing on LANs that include Windows computers.

@@ Line 72: / Line 72: @@
 ===PostScript===
-LPR in base, and CUPS from ports perform the same function of receiving PostScript output and sending it to PostScript capable printers. CUPS allows printers that use other PCL's to be used through PostScript via PPD (PostScript Printer Description) conversions.
+LPR in base, and CUPS from ports perform the same function of receiving PostScript output and sending it to PostScript capable printers. CUPS allows printers that use other PDL's to be used through PostScript via PPD (PostScript Printer Description) conversions. LPR uses filters to convert from Postscript and other formats to a language a printer understands.
 PostScript is the default for both CUPS and Apple. For the most common PDL's: PostScript is considered higher quality than PCL, so more preference is centered around it. There are also very high quality printers that don't use either of these two PDL's.

@@ Line 55: / Line 55: @@
 Industrial, label, legacy and other specialized printers don't have the capability for these modern printing formats. LPrint is intended for label printers to work with CUPS, and a few are already supported. The PAPPL framework could be the replacement for drivers of legacy, specialty and other printers to work with newer versions of CUPS.
-Legacy printers may have an application that addresses their Printer Description Language for use with the newer versions of CUPS. PCL has hp-printer-app, and PostScript has ps-printer-ap.
+Legacy printers may have an application that addresses their Printer Description Language for use with the newer versions of CUPS. PCL has hp-printer-app, and PostScript has ps-printer-app.
 For 3D printers, there are a few formats supported: 3MF, U3D, PRC and PWG compliant G-code. Different versions of PDF have support for either U3D and PRC.

← Older revision		Revision as of 17:04, 22 June 2021
Line 54:		Line 54:

	Industrial, label, legacy and other specialized printers don't have the capability for these modern printing formats. LPrint is intended for label printers to work with CUPS, and a few are already supported. The PAPPL framework could be the replacement for drivers of legacy, specialty and other printers to work with newer versions of CUPS.		Industrial, label, legacy and other specialized printers don't have the capability for these modern printing formats. LPrint is intended for label printers to work with CUPS, and a few are already supported. The PAPPL framework could be the replacement for drivers of legacy, specialty and other printers to work with newer versions of CUPS.
		+
		+	Legacy printers may have an application that addresses their Printer Description Language for use with the newer versions of CUPS. PCL has hp-printer-app, and PostScript has ps-printer-ap.

	For 3D printers, there are a few formats supported: 3MF, U3D, PRC and PWG compliant G-code. Different versions of PDF have support for either U3D and PRC.		For 3D printers, there are a few formats supported: 3MF, U3D, PRC and PWG compliant G-code. Different versions of PDF have support for either U3D and PRC.

@@ Line 38: / Line 38: @@
 Some programs, such as forks of OpenOffice (such as LibreOffice or Apache OpenOffice) provide their own drivers that output to LPR in place of already configured filters like Ghostscript. Their printing has to be set up independently from an already working CUPS or LPR print configuration.
-The Printer Working Group (PWG) intends to offer driverless scanning over IPP. However, there are no IPP scanners and there's no working program from PWG, so SANE is still the de-facto standard for open-source printing.
+The Printer Working Group (PWG) intends to offer driverless scanning over IPP. However, there are no IPP scanners and there's no working program from PWG, so SANE is still the de-facto standard for open-source printing. SANE is under GPL, and it is unable to be changed to LGPL by the wishes of its maintainers, because it has multiple contributors.
 ==Modern CUPS specifications==

← Older revision		Revision as of 23:52, 21 June 2021
Line 54:		Line 54:

	Industrial, label, legacy and other specialized printers don't have the capability for these modern printing formats. LPrint is intended for label printers to work with CUPS, and a few are already supported. The PAPPL framework could be the replacement for drivers of legacy, specialty and other printers to work with newer versions of CUPS.		Industrial, label, legacy and other specialized printers don't have the capability for these modern printing formats. LPrint is intended for label printers to work with CUPS, and a few are already supported. The PAPPL framework could be the replacement for drivers of legacy, specialty and other printers to work with newer versions of CUPS.
−

	For 3D printers, there are a few formats supported: 3MF, U3D, PRC and PWG compliant G-code. Different versions of PDF have support for either U3D and PRC.		For 3D printers, there are a few formats supported: 3MF, U3D, PRC and PWG compliant G-code. Different versions of PDF have support for either U3D and PRC.

← Older revision		Revision as of 23:51, 21 June 2021
Line 37:		Line 37:

	Some programs, such as forks of OpenOffice (such as LibreOffice or Apache OpenOffice) provide their own drivers that output to LPR in place of already configured filters like Ghostscript. Their printing has to be set up independently from an already working CUPS or LPR print configuration.		Some programs, such as forks of OpenOffice (such as LibreOffice or Apache OpenOffice) provide their own drivers that output to LPR in place of already configured filters like Ghostscript. Their printing has to be set up independently from an already working CUPS or LPR print configuration.
		+
		+	The Printer Working Group (PWG) intends to offer driverless scanning over IPP. However there are no IPP scanners and there's no working program from PWG, so SANE is still the de-facto standard for open-source printing.

	==Modern CUPS specifications==		==Modern CUPS specifications==

@@ Line 112: / Line 112: @@
 * https://www.pwg.org/3d/index.html
 * https://www.pwg.org/ipp/ippguide.html
 (some references are out of date, but still have relevance)