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<!-- SECTION: Programming -->
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<title>Introduction to the PPD Compiler</title>
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--></style>
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</head>
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<body>
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<!--
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PPD compiler documentation for CUPS.
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Copyright © 2007-2012 by Apple Inc.
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Copyright © 1997-2007 by Easy Software Products.
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Licensed under Apache License v2.0. See the file "LICENSE" for more
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information.
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-->
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<h1 class='title'>Introduction to the PPD Compiler</h1>
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<P>This document describes how to use the CUPS PostScript Printer Description
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(PPD) file compiler. The PPD compiler generates PPD files from simple text files
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that describe the features and capabilities of one or more printers.</P>
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<BLOCKQUOTE><B>Note:</B>
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<P>The PPD compiler and related tools are deprecated and will be removed in a future release of CUPS.</P>
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</BLOCKQUOTE>
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<div class='summary'><table summary='General Information'>
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<tbody>
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<tr>
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<th>See Also</th>
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<td>Programming: <a href='raster-driver.html'>Developing Raster Printer Drivers</a><br>
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Programming: <a href='postscript-driver.html'>Developing PostScript Printer Drivers</a><br>
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Programming: <a href='api-filter.html'>Filter and Backend Programming</a><br>
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Programming: <a href='api-raster.html'>Raster API</a><br>
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References: <a href='ref-ppdcfile.html'>PPD Compiler Driver Information File Reference</a><br>
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Specifications: <a href='spec-ppd.html'>CUPS PPD Extensions</a></td>
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</tr>
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</tbody>
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</table></div>
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<div class="contents">
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<h2 class="title">Contents</h2>
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<ul class="contents">
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<li><a href="#BASICS">The Basics</a></li>
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<li><a href="#DRV">Driver Information Files</a><ul class="subcontents">
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<li><a href="#SIMPLE">A Simple Example</a></li>
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<li><a href="#GROUPING">Grouping and Inheritance</a></li>
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<li><a href="#COLOR">Color Support</a></li>
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<li><a href="#OPTIONS">Defining Custom Options and Option Groups</a></li>
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<li><a href="#DEFINE">Defining Constants</a></li>
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<li><a href="#CONDITIONAL">Conditional Statements</a></li>
|
|
|
<li><a href="#CONSTRAINTS">Defining Constraints</a></li>
|
|
|
</ul></li>
|
|
|
<li><a href="#LOCALIZATION">Localization</a><ul class="subcontents">
|
|
|
<li><a href="#PPDPO">The ppdpo Utility</a></li>
|
|
|
<li><a href="#PPDC_CATALOG">Using Message Catalogs with the PPD Compiler</a></li>
|
|
|
</ul></li>
|
|
|
</ul>
|
|
|
</div>
|
|
|
<div class="body">
|
|
|
<h2 class='title'><a name='BASICS'>The Basics</a></h2>
|
|
|
|
|
|
<P>The PPD compiler, <a href='man-ppdc.html'><code>ppdc(1)</code></a>, is a
|
|
|
simple command-line tool that takes a single <I>driver information file</I>,
|
|
|
which by convention uses the extension <VAR>.drv</VAR>, and produces one or more
|
|
|
PPD files that may be distributed with your printer drivers for use with CUPS.
|
|
|
For example, you would run the following command to create the English language
|
|
|
PPD files defined by the driver information file <VAR>mydrivers.drv</VAR>:</P>
|
|
|
|
|
|
<pre class='command'>
|
|
|
ppdc mydrivers.drv
|
|
|
</pre>
|
|
|
|
|
|
<P>The PPD files are placed in a subdirectory called
|
|
|
<VAR>ppd</VAR>. The <TT>-d</TT> option is used to put the PPD
|
|
|
files in a different location, for example:</p>
|
|
|
|
|
|
<pre class='command'>
|
|
|
ppdc -d myppds mydrivers.drv
|
|
|
</pre>
|
|
|
|
|
|
<P>places the PPD files in a subdirectory named
|
|
|
<VAR>myppds</VAR>. Finally, use the <TT>-l</TT> option to
|
|
|
specify the language localization for the PPD files that are
|
|
|
created, for example:</P>
|
|
|
|
|
|
<pre class='command'>
|
|
|
ppdc -d myppds/de -l de mydrivers.drv
|
|
|
ppdc -d myppds/en -l en mydrivers.drv
|
|
|
ppdc -d myppds/es -l es mydrivers.drv
|
|
|
ppdc -d myppds/fr -l fr mydrivers.drv
|
|
|
ppdc -d myppds/it -l it mydrivers.drv
|
|
|
</pre>
|
|
|
|
|
|
<P>creates PPD files in German (de), English (en), Spanish (es),
|
|
|
French (fr), and Italian (it) in the corresponding
|
|
|
subdirectories. Specify multiple languages (separated by commas) to produce
|
|
|
"globalized" PPD files:</p>
|
|
|
|
|
|
<pre class='command'>
|
|
|
ppdc -d myppds -l de,en,es,fr,it mydrivers.drv
|
|
|
</pre>
|
|
|
|
|
|
|
|
|
<h2 class='title'><a name='DRV'>Driver Information Files</a></h2>
|
|
|
|
|
|
<P>The driver information files accepted by the PPD compiler are
|
|
|
plain text files that define the various attributes and options
|
|
|
that are included in the PPD files that are generated. A driver
|
|
|
information file can define the information for one or more printers and
|
|
|
their corresponding PPD files.</P>
|
|
|
|
|
|
<p class='example'><a name="LISTING1">Listing 1: "examples/minimum.drv"</a></p>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<I>// Include standard font and media definitions</I>
|
|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <font.defs>
|
|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <media.defs>
|
|
|
|
|
|
<I>// List the fonts that are supported, in this case all standard fonts...</I>
|
|
|
<a href='ref-ppdcfile.html#Font'>Font</a> *
|
|
|
|
|
|
<I>// Manufacturer, model name, and version</I>
|
|
|
<a href='ref-ppdcfile.html#Manufacturer'>Manufacturer</a> "Foo"
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet 2000"
|
|
|
<a href='ref-ppdcfile.html#Version'>Version</a> 1.0
|
|
|
|
|
|
<I>// Each filter provided by the driver...</I>
|
|
|
<a href='ref-ppdcfile.html#Filter'>Filter</a> application/vnd.cups-raster 100 rastertofoo
|
|
|
|
|
|
<I>// Supported page sizes</I>
|
|
|
*<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Letter
|
|
|
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> A4
|
|
|
|
|
|
<I>// Supported resolutions</I>
|
|
|
*<a href='ref-ppdcfile.html#Resolution'>Resolution</a> k 8 0 0 0 "600dpi/600 DPI"
|
|
|
|
|
|
<I>// Specify the name of the PPD file we want to generate...</I>
|
|
|
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "foojet2k.ppd"
|
|
|
</pre>
|
|
|
|
|
|
|
|
|
<h3><a name='SIMPLE'>A Simple Example</a></h3>
|
|
|
|
|
|
<P>The example in <A HREF="#LISTING1">Listing 1</A> shows a driver information
|
|
|
file which defines the minimum required attributes to provide a valid PPD file.
|
|
|
The first part of the file includes standard definition files for fonts and
|
|
|
media sizes:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <font.defs>
|
|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <media.defs>
|
|
|
</pre>
|
|
|
|
|
|
<P>The <TT>#include</TT> directive works just like the C/C++ include directive;
|
|
|
files included using the angle brackets (<TT><filename></TT>) are found
|
|
|
in any of the standard include directories and files included using quotes
|
|
|
(<TT>"filename"</TT>) are found in the same directory as the source or include
|
|
|
file. The <TT><font.defs></TT> include file defines the standard fonts
|
|
|
which are included with GPL Ghostscript and the Apple PDF RIP, while the
|
|
|
<TT><media.defs></TT> include file defines the standard media sizes
|
|
|
listed in Appendix B of the Adobe PostScript Printer Description File Format
|
|
|
Specification.</P>
|
|
|
|
|
|
<P>CUPS provides several other standard include files:</P>
|
|
|
|
|
|
<UL>
|
|
|
|
|
|
<LI><TT><epson.h></TT> - Defines all of the rastertoepson driver
|
|
|
constants.</LI>
|
|
|
|
|
|
<LI><TT><escp.h></TT> - Defines all of the rastertoescpx driver
|
|
|
constants.</LI>
|
|
|
|
|
|
<LI><TT><hp.h></TT> - Defines all of the rastertohp driver
|
|
|
constants.</LI>
|
|
|
|
|
|
<LI><TT><label.h></TT> - Defines all of the rastertolabel driver
|
|
|
constants.</LI>
|
|
|
|
|
|
<LI><TT><pcl.h></TT> - Defines all of the rastertopclx driver
|
|
|
constants.</LI>
|
|
|
|
|
|
<LI><TT><raster.defs></TT> - Defines all of the CUPS raster format
|
|
|
constants.</LI>
|
|
|
|
|
|
</UL>
|
|
|
|
|
|
<P>Next we list all of the fonts that are available in the driver; for CUPS
|
|
|
raster drivers, the following line is all that is usually supplied:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#Font'>Font</a> *
|
|
|
</pre>
|
|
|
|
|
|
<P>The <TT>Font</TT> directive specifies the name of a single font or the
|
|
|
asterisk to specify all fonts. For example, you would use the following line to
|
|
|
define an additional bar code font that you are supplying with your printer
|
|
|
driver:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<I>// name encoding version charset status</I>
|
|
|
<a href='ref-ppdcfile.html#Font'>Font</a> Barcode-Foo Special "(1.0)" Special ROM
|
|
|
</pre>
|
|
|
|
|
|
<P>The name of the font is <TT>Barcode-Foo</TT>. Since it is not a standard
|
|
|
text font, the encoding and charset name <TT>Special</TT> is used. The version
|
|
|
number is <TT>1.0</TT> and the status (where the font is located) is
|
|
|
<TT>ROM</TT> to indicate that the font does not need to be embedded in
|
|
|
documents that use the font for this printer.</P>
|
|
|
|
|
|
<P>Third comes the manufacturer, model name, and version number information
|
|
|
strings:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#Manufacturer'>Manufacturer</a> "Foo"
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet 2000"
|
|
|
<a href='ref-ppdcfile.html#Version'>Version</a> 1.0
|
|
|
</pre>
|
|
|
|
|
|
<P>These strings are used when the user (or auto-configuration program) selects
|
|
|
the printer driver for a newly connected device.</p>
|
|
|
|
|
|
<P>The list of filters comes after the information strings; for the example in
|
|
|
<A HREF="#LISTING1">Listing 1</A>, we have a single filter that takes CUPS
|
|
|
raster data:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#Filter'>Filter</a> application/vnd.cups-raster 100 rastertofoo
|
|
|
</pre>
|
|
|
|
|
|
<P>Each filter specified in the driver information file is the equivalent of a
|
|
|
printer driver for that format; if a user submits a print job in a different
|
|
|
format, CUPS figures out the sequence of commands that will produce a supported
|
|
|
format for the least relative cost.</P>
|
|
|
|
|
|
<P>Once we have defined the driver information we specify the supported options.
|
|
|
For the example driver we support a single resolution of 600 dots per inch and
|
|
|
two media sizes, A4 and Letter:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
*<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Letter
|
|
|
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> A4
|
|
|
|
|
|
*<a href='ref-ppdcfile.html#Resolution'>Resolution</a> k 8 0 0 0 "600dpi/600 DPI"
|
|
|
</pre>
|
|
|
|
|
|
<P>The asterisk in front of the <TT>MediaSize</TT> and <TT>Resolution</TT>
|
|
|
directives specify that those option choices are the default. The
|
|
|
<TT>MediaSize</TT> directive is followed by a media size name which is normally
|
|
|
defined in the <TT><media.defs></TT> file and corresponds to a standard
|
|
|
Adobe media size name. If the default media size is <TT>Letter</TT>, the PPD
|
|
|
compiler will override it to be <TT>A4</TT> for non-English localizations for
|
|
|
you automatically.</P>
|
|
|
|
|
|
<P>The <TT>Resolution</TT> directive accepts several values after it as
|
|
|
follows:</P>
|
|
|
|
|
|
<OL>
|
|
|
|
|
|
<LI>Colorspace for this resolution, if any. In the example file, the
|
|
|
colorspace <TT>k</TT> is used which corresponds to black. For printer
|
|
|
drivers that support color printing, this field is usually specified as
|
|
|
"-" for "no change".</LI>
|
|
|
|
|
|
<LI>Bits per color. In the example file, we define 8 bits per color, for
|
|
|
a continuous-tone grayscale output. All versions of CUPS support 1 and
|
|
|
8 bits per color. CUPS 1.2 and higher (macOS 10.5 and higher) also
|
|
|
supports 16 bits per color.</LI>
|
|
|
|
|
|
<LI>Rows per band. In the example file, we define 0 rows per band to
|
|
|
indicate that our printer driver does not process the page in
|
|
|
bands.</LI>
|
|
|
|
|
|
<LI>Row feed. In the example, we define the feed value to be 0 to
|
|
|
indicate that our printer driver does not interleave the output.</LI>
|
|
|
|
|
|
<LI>Row step. In the example, we define the step value to be 0 to
|
|
|
indicate that our printer driver does not interleave the output. This
|
|
|
value normally indicates the spacing between the nozzles of an inkjet
|
|
|
printer - when combined with the previous two values, it informs the
|
|
|
driver how to stagger the output on the page to produce interleaved
|
|
|
lines on the page for higher-resolution output.</LI>
|
|
|
|
|
|
<LI>Choice name and text. In the example, we define the choice name and
|
|
|
text to be <TT>"600dpi/600 DPI"</TT>. The name and text are separated by
|
|
|
slash (<TT>/</TT>) character; if no text is specified, then the name is
|
|
|
used as the text. The PPD compiler parses the name to determine the
|
|
|
actual resolution; the name can be of the form
|
|
|
<TT><I>RESOLUTION</I>dpi</TT> for resolutions that are equal
|
|
|
horizontally and vertically or <TT><I>HRES</I>x<I>VRES</I>dpi</TT> for
|
|
|
isometric resolutions. Only integer resolution values are supported, so
|
|
|
a resolution name of <TT>300dpi</TT> is valid while <TT>300.1dpi</TT> is
|
|
|
not.</LI>
|
|
|
|
|
|
</OL>
|
|
|
|
|
|
<P>Finally, the <TT>PCFileName</TT> directive specifies that the named PPD file
|
|
|
should be written for the current driver definitions:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "foojet2k.ppd"
|
|
|
</pre>
|
|
|
|
|
|
<P>The filename follows the directive and <I>must</I> conform to the Adobe
|
|
|
filename requirements in the Adobe Postscript Printer Description File Format
|
|
|
Specification. Specifically, the filename may not exceed 8 characters followed
|
|
|
by the extension <VAR>.ppd</VAR>. The <TT>FileName</TT> directive can be used to
|
|
|
specify longer filenames:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#FileName'>FileName</a> "FooJet 2000"
|
|
|
</pre>
|
|
|
|
|
|
|
|
|
<h3><a name='GROUPING'>Grouping and Inheritance</a></h3>
|
|
|
|
|
|
<P>The previous example created a single PPD file. Driver information files can
|
|
|
also define multiple printers by using the PPD compiler grouping functionality.
|
|
|
Directives are grouped using the curly braces (<TT>{</TT> and <TT>}</TT>) and
|
|
|
every group that uses the <TT>PCFileName</TT> or <TT>FileName</TT> directives
|
|
|
produces a PPD file with that name. <A HREF="#LISTING2">Listing 2</A> shows a
|
|
|
variation of the original example that uses two groups to define two printers
|
|
|
that share the same printer driver filter but provide two different resolution
|
|
|
options.</P>
|
|
|
|
|
|
<p class='example'><a name="LISTING2">Listing 2: "examples/grouping.drv"</a></p>
|
|
|
|
|
|
<pre class='example'>
|
|
|
|
|
|
<I>// Include standard font and media definitions</I>
|
|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <font.defs>
|
|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <media.defs>
|
|
|
|
|
|
<I>// List the fonts that are supported, in this case all standard fonts...</I>
|
|
|
<a href='ref-ppdcfile.html#Font'>Font</a> *
|
|
|
|
|
|
<I>// Manufacturer and version</I>
|
|
|
<a href='ref-ppdcfile.html#Manufacturer'>Manufacturer</a> "Foo"
|
|
|
<a href='ref-ppdcfile.html#Version'>Version</a> 1.0
|
|
|
|
|
|
<I>// Each filter provided by the driver...</I>
|
|
|
<a href='ref-ppdcfile.html#Filter'>Filter</a> application/vnd.cups-raster 100 rastertofoo
|
|
|
|
|
|
<I>// Supported page sizes</I>
|
|
|
*<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Letter
|
|
|
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> A4
|
|
|
|
|
|
{
|
|
|
<I>// Supported resolutions</I>
|
|
|
*<a href='ref-ppdcfile.html#Resolution'>Resolution</a> k 8 0 0 0 "600dpi/600 DPI"
|
|
|
|
|
|
<I>// Specify the model name and filename...</I>
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet 2000"
|
|
|
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "foojet2k.ppd"
|
|
|
}
|
|
|
|
|
|
{
|
|
|
<I>// Supported resolutions</I>
|
|
|
*<a href='ref-ppdcfile.html#Resolution'>Resolution</a> k 8 0 0 0 "1200dpi/1200 DPI"
|
|
|
|
|
|
<I>// Specify the model name and filename...</I>
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet 2001"
|
|
|
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "foojt2k1.ppd"
|
|
|
}
|
|
|
</pre>
|
|
|
|
|
|
<P>The second example is essentially the same as the first, except that each
|
|
|
printer model is defined inside of a pair of curly braces. For example, the
|
|
|
first printer is defined using:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
{
|
|
|
// Supported resolutions
|
|
|
*<a href='ref-ppdcfile.html#Resolution'>Resolution</a> k 8 0 0 0 "600dpi/600 DPI"
|
|
|
|
|
|
// Specify the model name and filename...
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet 2000"
|
|
|
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "foojet2k.ppd"
|
|
|
}
|
|
|
</pre>
|
|
|
|
|
|
<P>The printer <I>inherits</I> all of the definitions from the parent group (the
|
|
|
top part of the file) and adds the additional definitions inside the curly
|
|
|
braces for that printer driver. When we define the second group, it also
|
|
|
inherits the same definitions from the parent group but <I>none</I> of the
|
|
|
definitions from the first driver. Groups can be nested to any number of levels
|
|
|
to support variations of similar models without duplication of information.</P>
|
|
|
|
|
|
|
|
|
<h3><a name='COLOR'>Color Support</a></h3>
|
|
|
|
|
|
<P>For printer drivers that support color printing, the
|
|
|
<TT>ColorDevice</TT> and <TT>ColorModel</TT> directives should be
|
|
|
used to tell the printing system that color output is desired
|
|
|
and in what formats. <A HREF="#LISTING3">Listing 3</A> shows a
|
|
|
variation of the previous example which includes a color printer
|
|
|
that supports printing at 300 and 600 DPI.</P>
|
|
|
|
|
|
<P>The key changes are the addition of the <TT>ColorDevice</TT>
|
|
|
directive:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#ColorDevice'>ColorDevice</a> true
|
|
|
</pre>
|
|
|
|
|
|
<P>which tells the printing system that the printer supports
|
|
|
color printing, and the <TT>ColorModel</TT> directives:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#ColorModel'>ColorModel</a> Gray/Grayscale w chunky 0
|
|
|
*<a href='ref-ppdcfile.html#ColorModel'>ColorModel</a> RGB/Color rgb chunky 0
|
|
|
</pre>
|
|
|
|
|
|
<P>which tell the printing system which colorspaces are supported by the printer
|
|
|
driver for color printing. Each of the <TT>ColorModel</TT> directives is
|
|
|
followed by the option name and text (<TT>Gray/Grayscale</TT> and
|
|
|
<TT>RGB/Color</TT>), the colorspace name (<TT>w</TT> and <TT>rgb</TT>), the
|
|
|
color organization (<TT>chunky</TT>), and the compression mode number
|
|
|
(<TT>0</TT>) to be passed to the driver. The option name can be any of the
|
|
|
standard Adobe <TT>ColorModel</TT> names:</P>
|
|
|
|
|
|
<UL>
|
|
|
|
|
|
<LI><TT>Gray</TT> - Grayscale output.
|
|
|
|
|
|
<LI><TT>RGB</TT> - Color output, typically using the RGB
|
|
|
colorspace, but without a separate black channel.
|
|
|
|
|
|
<LI><TT>CMYK</TT> - Color output with a separate black
|
|
|
channel.
|
|
|
|
|
|
</UL>
|
|
|
|
|
|
<P>Custom names can be used, however it is recommended that you use your vendor
|
|
|
prefix for any custom names, for example "fooName".</P>
|
|
|
|
|
|
<P>The colorspace name can be any of the following universally supported
|
|
|
colorspaces:</P>
|
|
|
|
|
|
<UL>
|
|
|
<LI><TT>w</TT> - Luminance</LI>
|
|
|
|
|
|
<LI><TT>rgb</TT> - Red, green, blue</LI>
|
|
|
|
|
|
<LI><TT>k</TT> - Black</LI>
|
|
|
|
|
|
<LI><TT>cmy</TT> - Cyan, magenta, yellow</LI>
|
|
|
|
|
|
<LI><TT>cmyk</TT> - Cyan, magenta, yellow, black</LI>
|
|
|
|
|
|
</UL>
|
|
|
|
|
|
<P>The color organization can be any of the following values:</P>
|
|
|
|
|
|
<UL>
|
|
|
|
|
|
<LI><TT>chunky</TT> - Color values are passed together on a line
|
|
|
as RGB RGB RGB RGB</LI>
|
|
|
|
|
|
<LI><TT>banded</TT> - Color values are passed separately
|
|
|
on a line as RRRR GGGG BBBB; not supported by the Apple
|
|
|
RIP filters</LI>
|
|
|
|
|
|
<LI><TT>planar</TT> - Color values are passed separately
|
|
|
on a page as RRRR RRRR RRRR ... GGGG GGGG GGGG ... BBBB
|
|
|
BBBB BBBB; not supported by the Apple RIP filters</LI>
|
|
|
|
|
|
</UL>
|
|
|
|
|
|
<P>The compression mode value is passed to the driver in the
|
|
|
<TT>cupsCompression</TT> attribute. It is traditionally used to select an
|
|
|
appropriate compression mode for the color model but can be used for any
|
|
|
purpose, such as specifying a photo mode vs. standard mode.</P>
|
|
|
|
|
|
<p class='example'><a name="LISTING3">Listing 3: "examples/color.drv"</a></p>
|
|
|
|
|
|
<pre class='example'>
|
|
|
|
|
|
<I>// Include standard font and media definitions</I>
|
|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <font.defs>
|
|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <media.defs>
|
|
|
|
|
|
<I>// List the fonts that are supported, in this case all standard fonts...</I>
|
|
|
<a href='ref-ppdcfile.html#Font'>Font</a> *
|
|
|
|
|
|
<I>// Manufacturer and version</I>
|
|
|
<a href='ref-ppdcfile.html#Manufacturer'>Manufacturer</a> "Foo"
|
|
|
<a href='ref-ppdcfile.html#Version'>Version</a> 1.0
|
|
|
|
|
|
<I>// Each filter provided by the driver...</I>
|
|
|
<a href='ref-ppdcfile.html#Filter'>Filter</a> application/vnd.cups-raster 100 rastertofoo
|
|
|
|
|
|
<I>// Supported page sizes</I>
|
|
|
*<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Letter
|
|
|
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> A4
|
|
|
|
|
|
{
|
|
|
<I>// Supported resolutions</I>
|
|
|
*<a href='ref-ppdcfile.html#Resolution'>Resolution</a> k 8 0 0 0 "600dpi/600 DPI"
|
|
|
|
|
|
<I>// Specify the model name and filename...</I>
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet 2000"
|
|
|
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "foojet2k.ppd"
|
|
|
}
|
|
|
|
|
|
{
|
|
|
<I>// Supports color printing</I>
|
|
|
<a href='ref-ppdcfile.html#ColorDevice'>ColorDevice</a> true
|
|
|
|
|
|
<I>// Supported colorspaces</I>
|
|
|
<a href='ref-ppdcfile.html#ColorModel'>ColorModel</a> Gray/Grayscale w chunky 0
|
|
|
*<a href='ref-ppdcfile.html#ColorModel'>ColorModel</a> RGB/Color rgb chunky 0
|
|
|
|
|
|
<I>// Supported resolutions</I>
|
|
|
*<a href='ref-ppdcfile.html#Resolution'>Resolution</a> - 8 0 0 0 "300dpi/300 DPI"
|
|
|
<a href='ref-ppdcfile.html#Resolution'>Resolution</a> - 8 0 0 0 "600dpi/600 DPI"
|
|
|
|
|
|
<I>// Specify the model name and filename...</I>
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet Color"
|
|
|
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "foojetco.ppd"
|
|
|
}
|
|
|
</pre>
|
|
|
|
|
|
|
|
|
<h3><a name='OPTIONS'>Defining Custom Options and Option Groups</a></h3>
|
|
|
|
|
|
<P>The <TT>Group</TT>, <TT>Option</TT>, and <TT>Choice</TT>
|
|
|
directives are used to define or select a group, option, or
|
|
|
choice. <A HREF="#LISTING4">Listing 4</A> shows a variation of
|
|
|
the first example that provides two custom options in a group
|
|
|
named "Footasm".</P>
|
|
|
|
|
|
<p class='example'><a name="LISTING4">Listing 4: "examples/custom.drv"</a></p>
|
|
|
|
|
|
<pre class='example'>
|
|
|
|
|
|
<I>// Include standard font and media definitions</I>
|
|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <font.defs>
|
|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <media.defs>
|
|
|
|
|
|
<I>// List the fonts that are supported, in this case all standard fonts...</I>
|
|
|
<a href='ref-ppdcfile.html#Font'>Font</a> *
|
|
|
|
|
|
<I>// Manufacturer, model name, and version</I>
|
|
|
<a href='ref-ppdcfile.html#Manufacturer'>Manufacturer</a> "Foo"
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet 2000"
|
|
|
<a href='ref-ppdcfile.html#Version'>Version</a> 1.0
|
|
|
|
|
|
<I>// Each filter provided by the driver...</I>
|
|
|
<a href='ref-ppdcfile.html#Filter'>Filter</a> application/vnd.cups-raster 100 rastertofoo
|
|
|
|
|
|
<I>// Supported page sizes</I>
|
|
|
*<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Letter
|
|
|
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> A4
|
|
|
|
|
|
<I>// Supported resolutions</I>
|
|
|
*<a href='ref-ppdcfile.html#Resolution'>Resolution</a> k 8 0 0 0 "600dpi/600 DPI"
|
|
|
|
|
|
<I>// Option Group</I>
|
|
|
<a href='ref-ppdcfile.html#Group'>Group</a> "Footasm"
|
|
|
|
|
|
<I>// Boolean option</I>
|
|
|
<a href='ref-ppdcfile.html#Option'>Option</a> "fooEnhance/Resolution Enhancement" Boolean AnySetup 10
|
|
|
*<a href='ref-ppdcfile.html#Choice'>Choice</a> True/Yes "<</cupsCompression 1>>setpagedevice"
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> False/No "<</cupsCompression 0>>setpagedevice"
|
|
|
|
|
|
<I>// Multiple choice option</I>
|
|
|
<a href='ref-ppdcfile.html#Option'>Option</a> "fooOutputType/Output Quality" PickOne AnySetup 10
|
|
|
*<a href='ref-ppdcfile.html#Choice'>Choice</a> "Auto/Automatic Selection"
|
|
|
"<</OutputType(Auto)>>setpagedevice""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "Text/Optimize for Text"
|
|
|
"<</OutputType(Text)>>setpagedevice""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "Graph/Optimize for Graphics"
|
|
|
"<</OutputType(Graph)>>setpagedevice""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "Photo/Optimize for Photos"
|
|
|
"<</OutputType(Photo)>>setpagedevice""
|
|
|
|
|
|
<I>// Specify the name of the PPD file we want to generate...</I>
|
|
|
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "foojet2k.ppd"
|
|
|
</pre>
|
|
|
|
|
|
<P>The custom group is introduced by the <TT>Group</TT>
|
|
|
directive which is followed by the name and optionally text for
|
|
|
the user:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#Group'>Group</a> "Footasm/Footastic Options"
|
|
|
</pre>
|
|
|
|
|
|
<P>The group name must conform to the PPD specification and
|
|
|
cannot exceed 40 characters in length. If you specify user text,
|
|
|
it cannot exceed 80 characters in length. The groups
|
|
|
<TT>General</TT>, <TT>Extra</TT>, and
|
|
|
<TT>InstallableOptions</TT> are predefined by CUPS; the general
|
|
|
and extra groups are filled by the UI options defined by the PPD
|
|
|
specification. The <TT>InstallableOptions</TT> group is reserved
|
|
|
for options that define whether accessories for the printer
|
|
|
(duplexer unit, finisher, stapler, etc.) are installed.</P>
|
|
|
|
|
|
<P>Once the group is specified, the <TT>Option</TT> directive is
|
|
|
used to introduce a new option:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#Option'>Option</a> "fooEnhance/Resolution Enhancement" Boolean AnySetup 10
|
|
|
</pre>
|
|
|
|
|
|
<P>The directive is followed by the name of the option and any
|
|
|
optional user text, the option type, the PostScript document group, and
|
|
|
the sort order number. The option name must conform to the PPD specification
|
|
|
and cannot exceed 40 characters in length. If you specify user text, it
|
|
|
cannot exceed 80 characters in length.</P>
|
|
|
|
|
|
<P>The option type can be <TT>Boolean</TT> for true/false
|
|
|
selections, <TT>PickOne</TT> for picking one of many choices, or
|
|
|
<TT>PickMany</TT> for picking zero or more choices. Boolean
|
|
|
options can have at most two choices with the names
|
|
|
<TT>False</TT> and <TT>True</TT>. Pick options can have any
|
|
|
number of choices, although for Windows compatibility reasons
|
|
|
the number of choices should not exceed 255.</P>
|
|
|
|
|
|
<P>The PostScript document group is typically <TT>AnySetup</TT>,
|
|
|
meaning that the option can be introduced at any point in the
|
|
|
PostScript document. Other values include <TT>PageSetup</TT> to
|
|
|
include the option before each page and <TT>DocumentSetup</TT>
|
|
|
to include the option once at the beginning of the document.</P>
|
|
|
|
|
|
<P>The sort order number is used to sort the printer commands
|
|
|
associated with each option choice within the PostScript
|
|
|
document. This allows you to setup certain options before others
|
|
|
as required by the printer. For most CUPS raster printer
|
|
|
drivers, the value <TT>10</TT> can be used for all options.</P>
|
|
|
|
|
|
<P>Once the option is specified, each option choice can be
|
|
|
listed using the <TT>Choice</TT> directive:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
*<a href='ref-ppdcfile.html#Choice'>Choice</a> True/Yes "<</cupsCompression 1>>setpagedevice"
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> False/No "<</cupsCompression 0>>setpagedevice"
|
|
|
</pre>
|
|
|
|
|
|
<P>The directive is followed by the choice name and optionally
|
|
|
user text, and the PostScript commands that should be inserted
|
|
|
when printing a file to this printer. The option name must
|
|
|
conform to the PPD specification and cannot exceed 40 characters
|
|
|
in length. If you specify user text, it cannot exceed 80
|
|
|
characters in length.</P>
|
|
|
|
|
|
<P>The PostScript commands are also interpreted by any RIP
|
|
|
filters, so these commands typically must be present for all
|
|
|
option choices. Most commands take the form:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<</name value>>setpagedevice
|
|
|
</pre>
|
|
|
|
|
|
<P>where <TT>name</TT> is the name of the PostScript page device
|
|
|
attribute and <TT>value</TT> is the numeric or string value for
|
|
|
that attribute.</P>
|
|
|
|
|
|
|
|
|
<h3><a name='DEFINE'>Defining Constants</a></h3>
|
|
|
|
|
|
<P>Sometimes you will want to define constants for your drivers
|
|
|
so that you can share values in different groups within the same
|
|
|
driver information file, or to share values between different
|
|
|
driver information files using the <TT>#include</TT> directive.
|
|
|
The <TT>#define</TT> directive is used to define constants for
|
|
|
use in your printer definitions:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#_define'>#define</a> NAME value
|
|
|
</pre>
|
|
|
|
|
|
<P>The <TT>NAME</TT> is any sequence of letters, numbers, and
|
|
|
the underscore. The <TT>value</TT> is a number or string; if the
|
|
|
value contains spaces you must put double quotes around it, for
|
|
|
example:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#_define'>#define</a> FOO "My String Value"
|
|
|
</pre>
|
|
|
|
|
|
<P>Constants can also be defined on the command-line using the <tt>-D</tt>
|
|
|
option:</P>
|
|
|
|
|
|
<pre class='command'>
|
|
|
ppdc -DNAME="value" filename.drv
|
|
|
</pre>
|
|
|
|
|
|
<P>Once defined, you use the notation <TT>$NAME</TT> to substitute the value of
|
|
|
the constant in the file, for example:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#_define'>#define</a> MANUFACTURER "Foo"
|
|
|
<a href='ref-ppdcfile.html#_define'>#define</a> FOO_600 0
|
|
|
<a href='ref-ppdcfile.html#_define'>#define</a> FOO_1200 1
|
|
|
|
|
|
{
|
|
|
<a href='ref-ppdcfile.html#Manufacturer'>Manufacturer</a> "$MANUFACTURER"
|
|
|
<a href='ref-ppdcfile.html#ModelNumber'>ModelNumber</a> $FOO_600
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet 2000"
|
|
|
...
|
|
|
}
|
|
|
|
|
|
{
|
|
|
<a href='ref-ppdcfile.html#Manufacturer'>Manufacturer</a> "$MANUFACTURER"
|
|
|
<a href='ref-ppdcfile.html#ModelNumber'>ModelNumber</a> $FOO_1200
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet 2001"
|
|
|
...
|
|
|
}
|
|
|
</pre>
|
|
|
|
|
|
<P>Numeric constants can be bitwise OR'd together by placing the constants
|
|
|
inside parenthesis, for example:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<I>// ModelNumber capability bits</I>
|
|
|
<a href='ref-ppdcfile.html#_define'>#define</a> DUPLEX 1
|
|
|
<a href='ref-ppdcfile.html#_define'>#define</a> COLOR 2
|
|
|
|
|
|
...
|
|
|
|
|
|
{
|
|
|
<I>// Define a model number specifying the capabilities of the printer...</I>
|
|
|
<a href='ref-ppdcfile.html#ModelNumber'>ModelNumber</a> ($DUPLEX $COLOR)
|
|
|
...
|
|
|
}
|
|
|
</pre>
|
|
|
|
|
|
|
|
|
<h3><a name='CONDITIONAL'>Conditional Statements</a></h3>
|
|
|
|
|
|
<p>The PPD compiler supports conditional compilation using the <tt>#if</tt>,
|
|
|
<tt>#elif</tt>, <tt>#else</tt>, and <tt>#endif</tt> directives. The <tt>#if</tt>
|
|
|
and <tt>#elif</tt> directives are followed by a constant name or an expression.
|
|
|
For example, to include a group of options when "ADVANCED" is defined:</p>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#_if'>#if</a> ADVANCED
|
|
|
<a href='ref-ppdcfile.html#Group'>Group</a> "Advanced/Advanced Options"
|
|
|
<a href='ref-ppdcfile.html#Option'>Option</a> "fooCyanAdjust/Cyan Adjustment"
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "plus10/+10%" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "plus5/+5%" ""
|
|
|
*<a href='ref-ppdcfile.html#Choice'>Choice</a> "none/No Adjustment" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "minus5/-5%" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "minus10/-10%" ""
|
|
|
<a href='ref-ppdcfile.html#Option'>Option</a> "fooMagentaAdjust/Magenta Adjustment"
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "plus10/+10%" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "plus5/+5%" ""
|
|
|
*<a href='ref-ppdcfile.html#Choice'>Choice</a> "none/No Adjustment" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "minus5/-5%" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "minus10/-10%" ""
|
|
|
<a href='ref-ppdcfile.html#Option'>Option</a> "fooYellowAdjust/Yellow Adjustment"
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "plus10/+10%" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "plus5/+5%" ""
|
|
|
*<a href='ref-ppdcfile.html#Choice'>Choice</a> "none/No Adjustment" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "minus5/-5%" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "minus10/-10%" ""
|
|
|
<a href='ref-ppdcfile.html#Option'>Option</a> "fooBlackAdjust/Black Adjustment"
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "plus10/+10%" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "plus5/+5%" ""
|
|
|
*<a href='ref-ppdcfile.html#Choice'>Choice</a> "none/No Adjustment" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "minus5/-5%" ""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "minus10/-10%" ""
|
|
|
<a href='ref-ppdcfile.html#_endif'>#endif</a>
|
|
|
</pre>
|
|
|
|
|
|
|
|
|
<h3><a name='CONSTRAINTS'>Defining Constraints</a></h3>
|
|
|
|
|
|
<P>Constraints are strings that are used to specify that one or more option
|
|
|
choices are incompatible, for example two-sided printing on transparency media.
|
|
|
Constraints are also used to prevent the use of uninstalled features such as the
|
|
|
duplexer unit, additional media trays, and so forth.</P>
|
|
|
|
|
|
<P>The <TT>UIConstraints</TT> directive is used to specify a constraint that is
|
|
|
placed in the PPD file. The directive is followed by a string using one of the
|
|
|
following formats:</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#UIConstraints'>UIConstraints</a> "*Option1 *Option2"
|
|
|
<a href='ref-ppdcfile.html#UIConstraints'>UIConstraints</a> "*Option1 Choice1 *Option2"
|
|
|
<a href='ref-ppdcfile.html#UIConstraints'>UIConstraints</a> "*Option1 *Option2 Choice2"
|
|
|
<a href='ref-ppdcfile.html#UIConstraints'>UIConstraints</a> "*Option1 Choice1 *Option2 Choice2"
|
|
|
</pre>
|
|
|
|
|
|
<P>Each option name is preceded by the asterisk (<TT>*</TT>). If no choice is
|
|
|
given for an option, then all choices <I>except</I> <TT>False</TT> and
|
|
|
<TT>None</TT> will conflict with the other option and choice(s). Since the PPD
|
|
|
compiler automatically adds reciprocal constraints (option A conflicts with
|
|
|
option B, so therefore option B conflicts with option A), you need only specify
|
|
|
the constraint once.</P>
|
|
|
|
|
|
<p class='example'><a name="LISTING5">Listing 5: "examples/constraint.drv"</a></p>
|
|
|
|
|
|
<pre class='example'>
|
|
|
|
|
|
<I>// Include standard font and media definitions</I>
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|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <font.defs>
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|
|
<a href='ref-ppdcfile.html#_include'>#include</a> <media.defs>
|
|
|
|
|
|
<I>// List the fonts that are supported, in this case all standard fonts...</I>
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|
|
<a href='ref-ppdcfile.html#Font'>Font</a> *
|
|
|
|
|
|
<I>// Manufacturer, model name, and version</I>
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|
|
<a href='ref-ppdcfile.html#Manufacturer'>Manufacturer</a> "Foo"
|
|
|
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "FooJet 2000"
|
|
|
<a href='ref-ppdcfile.html#Version'>Version</a> 1.0
|
|
|
|
|
|
<I>// Each filter provided by the driver...</I>
|
|
|
<a href='ref-ppdcfile.html#Filter'>Filter</a> application/vnd.cups-raster 100 rastertofoo
|
|
|
|
|
|
<I>// Supported page sizes</I>
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|
|
*<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Letter
|
|
|
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> A4
|
|
|
|
|
|
<I>// Supported resolutions</I>
|
|
|
*<a href='ref-ppdcfile.html#Resolution'>Resolution</a> k 8 0 0 0 "600dpi/600 DPI"
|
|
|
|
|
|
<I>// Installable Option Group</I>
|
|
|
<a href='ref-ppdcfile.html#Group'>Group</a> "InstallableOptions/Options Installed"
|
|
|
|
|
|
<I>// Duplexing unit option</I>
|
|
|
<a href='ref-ppdcfile.html#Option'>Option</a> "OptionDuplexer/Duplexing Unit" Boolean AnySetup 10
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> True/Installed ""
|
|
|
*<a href='ref-ppdcfile.html#Choice'>Choice</a> "False/Not Installed" ""
|
|
|
|
|
|
<I>// General Option Group</I>
|
|
|
<a href='ref-ppdcfile.html#Group'>Group</a> General
|
|
|
|
|
|
<I>// Duplexing option</I>
|
|
|
<a href='ref-ppdcfile.html#Option'>Option</a> "Duplex/Two-Sided Printing" PickOne AnySetup 10
|
|
|
*<a href='ref-ppdcfile.html#Choice'>Choice</a> "None/No" "<</Duplex false>>setpagedevice""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "DuplexNoTumble/Long Edge Binding"
|
|
|
"<</Duplex true/Tumble false>>setpagedevice""
|
|
|
<a href='ref-ppdcfile.html#Choice'>Choice</a> "DuplexTumble/Short Edge Binding"
|
|
|
"<</Duplex true/Tumble true>>setpagedevice""
|
|
|
|
|
|
<I>// Only allow duplexing if the duplexer is installed</I>
|
|
|
<a href='ref-ppdcfile.html#UIConstraints'>UIConstraints</a> "*Duplex *OptionDuplexer False"
|
|
|
|
|
|
<I>// Specify the name of the PPD file we want to generate...</I>
|
|
|
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "foojet2k.ppd"
|
|
|
</pre>
|
|
|
|
|
|
<P><A HREF="#LISTING5">Listing 5</A> shows a variation of the first example with
|
|
|
an added <TT>Duplex</TT> option and installable option for the duplexer,
|
|
|
<TT>OptionDuplex</TT>. A constraint is added at the end to specify that any
|
|
|
choice of the <TT>Duplex</TT> option that is not <TT>None</TT> is incompatible
|
|
|
with the "Duplexer Installed" option set to "Not Installed"
|
|
|
(<TT>False</TT>):</P>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#UIConstraints'>UIConstraints</a> "*Duplex *OptionDuplexer False"
|
|
|
</pre>
|
|
|
|
|
|
<h4>Enhanced Constraints</h4>
|
|
|
|
|
|
<p>CUPS 1.4 supports constraints between 2 or more options using the
|
|
|
<TT>Attribute</TT> directive. <TT>cupsUIConstraints</TT> attributes define
|
|
|
the constraints, while <TT>cupsUIResolver</TT> attributes define option changes
|
|
|
to resolve constraints. For example, we can specify the previous duplex
|
|
|
constraint with a resolver that turns off duplexing with the following two
|
|
|
lines:</p>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> cupsUIConstraints DuplexOff "*Duplex *OptionDuplexer False"
|
|
|
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> cupsUIResolver DuplexOff "*Duplex None"
|
|
|
</pre>
|
|
|
|
|
|
<h2 class='title'><a name='LOCALIZATION'>Localization</a></h2>
|
|
|
|
|
|
<p>The PPD compiler provides localization of PPD files in different languages
|
|
|
through <i>message catalog</i> files in the GNU gettext or Apple .strings
|
|
|
formats. Each user text string and several key PPD attribute values such as
|
|
|
<tt>LanguageVersion</tt> and <tt>LanguageEncoding</tt> are looked up in the
|
|
|
corresponding message catalog and the translated text is substituted in the
|
|
|
generated PPD files. One message catalog file can be used by multiple driver
|
|
|
information files, and each file contains a single language translation.</p>
|
|
|
|
|
|
<h3><a name='PPDPO'>The ppdpo Utility</a></h3>
|
|
|
|
|
|
<p>While CUPS includes localizations of all standard media sizes and options in
|
|
|
several languages, your driver information files may provide their own media
|
|
|
sizes and options that need to be localized. CUPS provides a utility program to
|
|
|
aid in the localization of drivers called <a
|
|
|
href='man-ppdpo.html'><tt>ppdpo(1)</tt></a>. The <tt>ppdpo</tt> program creates
|
|
|
or updates a message catalog file based upon one or more driver information
|
|
|
files. New messages are added with the word "TRANSLATE" added to the front of
|
|
|
the translation string to make locating new strings for translation easier. The
|
|
|
program accepts the message catalog filename and one or more driver information
|
|
|
files.</p>
|
|
|
|
|
|
<p>For example, run the following command to create a new German message catalog
|
|
|
called <var>de.po</var> for all of the driver information files in the current
|
|
|
directory:</p>
|
|
|
|
|
|
<pre class='command'>
|
|
|
ppdpo -o de.po *.drv
|
|
|
</pre>
|
|
|
|
|
|
<p>If the file <var>de.po</var> already exists, <tt>ppdpo</tt> will update the
|
|
|
contents of the file with any new messages that need to be translated. To create
|
|
|
an Apple .strings file instead, specify the output filename with a .strings
|
|
|
extension, for example:</p>
|
|
|
|
|
|
<pre class='command'>
|
|
|
ppdpo -o de.strings *.drv
|
|
|
</pre>
|
|
|
|
|
|
<h3><a name='PPDC_CATALOG'>Using Message Catalogs with the PPD Compiler</a></h3>
|
|
|
|
|
|
<p>Once you have created a message catalog, use the <a
|
|
|
href='ref-ppdcfile.html#_po'><tt>#po</tt></a> directive to declare it in each
|
|
|
driver information file. For example, to declare the German message catalog for
|
|
|
a driver use:</p>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#_po'>#po</a> de "de.po" // German
|
|
|
</pre>
|
|
|
|
|
|
<p>In fact, you can use the <tt>#po</tt> directive as many times as needed:</p>
|
|
|
|
|
|
<pre class='example'>
|
|
|
<a href='ref-ppdcfile.html#_po'>#po</a> de "de.po" // German
|
|
|
<a href='ref-ppdcfile.html#_po'>#po</a> es "es.po" // Spanish
|
|
|
<a href='ref-ppdcfile.html#_po'>#po</a> fr "fr.po" // French
|
|
|
<a href='ref-ppdcfile.html#_po'>#po</a> it "it.po" // Italian
|
|
|
<a href='ref-ppdcfile.html#_po'>#po</a> ja "ja.po" // Japanese
|
|
|
</pre>
|
|
|
|
|
|
<p>The filename ("de.po", etc.) can be relative to the location of the driver
|
|
|
information file or an absolute path. Once defined, the PPD compiler will
|
|
|
automatically generate a globalized PPD for every language declared in your
|
|
|
driver information file. To generate a single-language PPD file, simply use the
|
|
|
<tt>-l</tt> option to list the corresponding locale, for example:</p>
|
|
|
|
|
|
<pre class='command'>
|
|
|
ppdc -l de -d ppd/de mydrivers.drv
|
|
|
</pre>
|
|
|
|
|
|
<p>to generate German PPD files.</p>
|
|
|
</div>
|
|
|
</body>
|
|
|
</html>
|
