doc/help/api-overview.html

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   5         <title>Introduction to CUPS Programming </title>
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 353 <body>
 354 <div class='body'>
 355 <!--
 356   Introduction to CUPS programming header for CUPS.
 357
 358   Copyright 2008-2011 by Apple Inc.
 359
 360   These coded instructions, statements, and computer programs are the
 361   property of Apple Inc. and are protected by Federal copyright
 362   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
 363   which should have been included with this file.  If this file is
 364   file is missing or damaged, see the license at "http://www.cups.org/".
 365 -->
 366
 367 <h1 class='title'>Introduction to CUPS Programming</h1>
 368
 369 <div class='summary'><table summary='General Information'>
 370 <thead>
 371 <tr>
 372         <th>Headers</th>
 373         <th>cups/cups.h<br>
 374         cups/array.h<br>
 375         cups/backend.h<br>
 376         cups/dir.h<br>
 377         cups/file.h<br>
 378         cups/ppd.h<br>
 379         cups/raster.h<br>
 380         cups/sidechannel.h</th>
 381 </tr>
 382 </thead>
 383 <tbody>
 384 <tr>
 385         <th>Libraries</th>
 386         <td>-lcups<br>
 387         -lcupsimage</td>
 388 </tr>
 389 <tr>
 390         <th>See Also</th>
 391         <td>Programming: <a href='raster-driver.html' target='_top'>Developing Raster Printer Drivers</a><br>
 392         Programming: <a href='postscript-driver.html' target='_top'>Developing PostScript Printer Drivers</a><br>
 393         Programming: <a href='api-filter.html' target='_top'>Filter and Backend Programming</a><br>
 394         Programming: <a href='ppd-compiler.html' target='_top'>Introduction to the PPD Compiler</a><br>
 395         Programming: <a href='api-array.html' target='_top'>Array API</a><br>
 396         Programming: <a href='api-cups.html' target='_top'>CUPS API</a><br>
 397         Programming: <a href='api-filedir.html' target='_top'>File and Directory APIs</a><br>
 398         Programming: <a href='api-httpipp.html' target='_top'>HTTP and IPP APIs</a><br>
 399         Programming: <a href='api-ppd.html' target='_top'>PPD API</a><br>
 400         Programming: <a href='api-raster.html' target='_top'>Raster API</a><br>
 401         References: <a href='ref-ppdcfile.html' target='_top'>PPD Compiler Driver Information File Reference</a><br>
 402         Specifications: <a href='spec-ppd.html' target='_top'>CUPS PPD Extensions</a></td>
 403 </tr>
 404 </tbody>
 405 </table></div>
 406 <h2 class="title">Contents</h2>
 407 <ul class="contents">
 408 <li><a href="#OVERVIEW">Overview</a></li>
 409 <li><a href="#COMPILING">Compiling Programs</a><ul class="subcontents">
 410         <li><a href="#XCODE">Compiling with Xcode</a></li>
 411         <li><a href="#COMMANDLINE">Compiling with GCC</a></li>
 412 </ul></li>
 413 <li><a href="#WHERETOGO">Where to Go Next</a></li>
 414 </ul>
 415 <!--
 416   Introduction to CUPS programming content for CUPS.
 417
 418   Copyright 2008-2011 by Apple Inc.
 419
 420   These coded instructions, statements, and computer programs are the
 421   property of Apple Inc. and are protected by Federal copyright
 422   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
 423   which should have been included with this file.  If this file is
 424   file is missing or damaged, see the license at "http://www.cups.org/".
 425 -->
 426
 427 <h2 class="title"><a name="OVERVIEW">Overview</a></h2>
 428
 429 <p>CUPS provides two libraries that interface with the different parts of the
 430 printing system. The "cups" library provides all of the common application and
 431 filter functions while the "cupsimage" library provides all of the imaging
 432 functions used in raster printer drivers. The "cups" library functions are
 433 accessed by including the <var>&lt;cups/cups.h&gt;</var> header, while
 434 "cupsimage" functions are found in the <var>&lt;cups/raster.h&gt;</var>
 435 header.</p>
 436
 437 <h2 class="title"><a name="COMPILING">Compiling Programs</a></h2>
 438
 439 <p>The CUPS libraries can be used from any C, C++, or Objective C program.
 440 The method of compiling against the libraries varies depending on the
 441 operating system and installation of CUPS. The following sections show how
 442 to compile a simple program (shown below) in two common environments.</p>
 443
 444 <p>The following simple program lists the available printers on the system:</p>
 445
 446 <pre class="example">
 447 #include &lt;stdio.h&gt;
 448 #include &lt;cups/cups.h&gt;
 449
 450 int main(void)
 451 {
 452   int i;
 453   cups_dest_t *dests, *dest;
 454   int num_dests = cupsGetDests(&amp;dests);
 455
 456   for (i = num_dests, dest = dests; i &gt; 0; i --, dest ++)
 457   {
 458     if (dest->instance)
 459       printf("%s/%s\n", dest->name, dest->instance);
 460     else
 461       puts(dest->name);
 462   }
 463
 464   return (0);
 465 }
 466 </pre>
 467
 468 <h3><a name="XCODE">Compiling with Xcode</a></h3>
 469
 470 <p>In Xcode, choose <var>New Project...</var> from the <var>File</var> menu,
 471 then select the <var>Standard Tool</var> project type under <var>Command Line
 472 Utility</var>. Click <var>Next</var> and choose a project directory. Click
 473 <var>Next</var> to create the project.</p>
 474
 475 <p>In the project window, double-click on the <var>Targets</var> group and
 476 control-click on the simple target to show the context menu. Choose
 477 <var>Existing Framework...</var> from the <var>Add</var> submenu. When the file
 478 chooser sheet appears, press the <kbd>/</kbd> key and enter "/usr/lib". Scroll
 479 down the file list and select the <var>libcups.dylib</var> file. Click the
 480 <var>Add</var> button in the file chooser and attributes sheets.</p>
 481
 482 <p>In the project window, double-click on the <var>main.c</var> source file.
 483 Replace the template source code with the listing above and save it. Click the
 484 <var>Build and Go</var> button to build the sample program and run it.</p>
 485
 486 <h3><a name="COMMANDLINE">Compiling with GCC</a></h3>
 487
 488 <p>From the command-line, create a file called <var>sample.c</var> using your
 489 favorite editor and then run the following command to compile it with GCC and
 490 run it:</p>
 491
 492 <pre class="command">
 493 gcc -o simple `cups-config --cflags` simple.c `cups-config --libs`
 494 ./simple
 495 </pre>
 496
 497 <p>The <code>cups-config</code> command provides the compiler flags
 498 ("cups-config --cflags") and libraries ("cups-config --libs") needed for the
 499 local system.</p>
 500
 501 <h2 class="title"><a name="WHERETOGO">Where to Go Next</a></h2>
 502
 503 <p>If you are developing a print filter, driver, or backend, see the
 504 <a href="api-filter.html" target="_top">Filter and Backend Programming</a>
 505 guide. Raster printer driver developers should also read the
 506 <a href="api-raster.html" target="_top">Raster API</a> reference.</p>
 507 </div>
 508 </body>
 509 </html>