1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
|
<!DOCTYPE html>
<html>
<!-- SECTION: Programming -->
<head>
<title>Developing Raster Printer Drivers</title>
<meta name="keywords" content="Programming">
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<meta name="creator" content="codedoc v3.2">
<meta name="author" content="Unknown">
<meta name="copyright" content="Unknown">
<meta name="version" content="0.0">
<style type="text/css"><!--
BODY {
font-family: lucida grande, geneva, helvetica, arial, sans-serif;
}
H1, H2, H3, H4, H5, H6, P, TD, TH {
font-family: lucida grande, geneva, helvetica, arial, sans-serif;
}
H1 { font-size: 2em; }
H2 { font-size: 1.75em; }
H3 { font-size: 1.5em; }
H4 { font-size: 1.25em; }
KBD {
font-family: monaco, courier, monospace;
font-weight: bold;
}
PRE {
font-family: monaco, courier, monospace;
}
BLOCKQUOTE {
border-left: solid 2px #777;
margin: 1em 0;
padding: 10px;
}
BLOCKQUOTE OL LI {
margin-left: -1em;
}
PRE.command, PRE.example {
background: #eee;
margin: 0 36pt;
padding: 10px;
}
P.compact {
margin: 0;
}
P.example {
font-style: italic;
margin-left: 36pt;
}
DL.man DD {
margin-left: 5em;
}
DL.man DT {
margin-left: 0;
}
PRE.man {
margin: 0;
}
PRE.command EM, PRE.example EM {
font-family: lucida grande, geneva, helvetica, arial, sans-serif;
}
P.command {
font-family: monaco, courier, monospace;
margin-left: 36pt;
}
P.formula {
font-style: italic;
margin-left: 36pt;
}
A IMG {
border: none;
}
A:link:hover IMG {
background: #f0f0f0;
border-radius: 10px;
-moz-border-radius: 10px;
}
A:link, A:visited {
font-weight: inherit;
text-decoration: none;
}
A:link:hover, A:visited:hover, A:active {
text-decoration: underline;
}
SUB, SUP {
font-size: 50%;
}
TR.data, TD.data, TR.data TD {
margin-top: 10pt;
padding: 5pt;
border-bottom: solid 1pt #999999;
}
TR.data TH {
border-bottom: solid 1pt #999999;
padding-top: 10pt;
padding-left: 5pt;
text-align: left;
}
DIV.table TABLE {
border: solid thin #999999;
border-collapse: collapse;
border-spacing: 0;
margin-left: auto;
margin-right: auto;
}
DIV.table CAPTION {
caption-side: top;
font-size: 120%;
font-style: italic;
font-weight: bold;
margin-left: auto;
margin-right: auto;
}
DIV.table TABLE TD {
border: solid thin #cccccc;
padding: 5pt 10pt 0;
}
DIV.table TABLE TH {
background: #cccccc;
border: none;
border-bottom: solid thin #999999;
}
DIV.figure TABLE {
margin-left: auto;
margin-right: auto;
}
DIV.figure CAPTION {
caption-side: bottom;
font-size: 120%;
font-style: italic;
font-weight: bold;
margin-left: auto;
margin-right: auto;
}
TH.label {
text-align: right;
vertical-align: top;
}
TH.sublabel {
text-align: right;
font-weight: normal;
}
HR {
border: solid thin;
}
SPAN.info {
background: black;
border: thin solid black;
color: white;
font-size: 80%;
font-style: italic;
font-weight: bold;
white-space: nowrap;
}
H2 SPAN.info, H3 SPAN.info, H4 SPAN.info {
float: right;
font-size: 100%;
}
H1.title {
}
H2.title, H3.title {
border-bottom: solid 2pt #000000;
}
DIV.indent, TABLE.indent {
margin-top: 2em;
margin-left: auto;
margin-right: auto;
width: 90%;
}
TABLE.indent {
border-collapse: collapse;
}
TABLE.indent TD, TABLE.indent TH {
padding: 0;
}
TABLE.list {
border-collapse: collapse;
margin-left: auto;
margin-right: auto;
width: 90%;
}
TABLE.list TH {
background: white;
border-bottom: solid thin #cccccc;
color: #444444;
padding-top: 10pt;
padding-left: 5pt;
text-align: left;
vertical-align: bottom;
white-space: nowrap;
}
TABLE.list TH A {
color: #4444cc;
}
TABLE.list TD {
border-bottom: solid thin #eeeeee;
padding-top: 5pt;
padding-left: 5pt;
}
TABLE.list TR:nth-child(even) {
background: #f8f8f8;
}
TABLE.list TR:nth-child(odd) {
background: #f4f4f4;
}
DT {
margin-left: 36pt;
margin-top: 12pt;
}
DD {
margin-left: 54pt;
}
DL.category DT {
font-weight: bold;
}
P.summary {
margin-left: 36pt;
font-family: monaco, courier, monospace;
}
DIV.summary TABLE {
border: solid thin #999999;
border-collapse: collapse;
border-spacing: 0;
margin: 10px;
}
DIV.summary TABLE TD, DIV.summary TABLE TH {
border: solid thin #999999;
padding: 5px;
text-align: left;
vertical-align: top;
}
DIV.summary TABLE THEAD TH {
background: #eeeeee;
}
/* API documentation styles... */
div.body h1 {
font-size: 250%;
font-weight: bold;
margin: 0;
}
div.body h2 {
font-size: 250%;
margin-top: 1.5em;
}
div.body h3 {
font-size: 150%;
margin-bottom: 0.5em;
margin-top: 1.5em;
}
div.body h4 {
font-size: 110%;
margin-bottom: 0.5em;
margin-top: 1.5em;
}
div.body h5 {
font-size: 100%;
margin-bottom: 0.5em;
margin-top: 1.5em;
}
div.contents {
background: #e8e8e8;
border: solid thin black;
padding: 10px;
}
div.contents h1 {
font-size: 110%;
}
div.contents h2 {
font-size: 100%;
}
div.contents ul.contents {
font-size: 80%;
}
.class {
border-bottom: solid 2px gray;
}
.constants {
}
.description {
margin-top: 0.5em;
}
.discussion {
}
.enumeration {
border-bottom: solid 2px gray;
}
.function {
border-bottom: solid 2px gray;
margin-bottom: 0;
}
.members {
}
.method {
}
.parameters {
}
.returnvalue {
}
.struct {
border-bottom: solid 2px gray;
}
.typedef {
border-bottom: solid 2px gray;
}
.union {
border-bottom: solid 2px gray;
}
.variable {
}
h1, h2, h3, h4, h5, h6 {
page-break-inside: avoid;
}
blockquote {
border: solid thin gray;
box-shadow: 3px 3px 5px rgba(0,0,0,0.5);
padding: 10px 10px 0px;
page-break-inside: avoid;
}
p code, li code, p.code, pre, ul.code li {
background: rgba(127,127,127,0.1);
border: thin dotted gray;
font-family: monospace;
hyphens: manual;
-webkit-hyphens: manual;
page-break-inside: avoid;
}
p.code, pre, ul.code li {
padding: 10px;
}
p code, li code {
padding: 2px 5px;
}
a:link, a:visited {
text-decoration: none;
}
span.info {
background: black;
border: solid thin black;
color: white;
font-size: 80%;
font-style: italic;
font-weight: bold;
white-space: nowrap;
}
h2 span.info, h3 span.info, h4 span.info {
border-radius: 10px;
float: right;
font-size: 80%;
padding: 3px 6px;
}
h2.title span.info, h3.title span.info, h4.title span.info {
border-bottom-left-radius: 0px;
border-bottom-right-radius: 0px;
}
h2.title span.info {
padding: 4px 6px;
}
ul.code, ul.contents, ul.subcontents {
list-style-type: none;
margin: 0;
padding-left: 0;
}
ul.code li {
margin: 0;
}
ul.contents > li {
margin-top: 1em;
}
ul.contents li ul.code, ul.contents li ul.subcontents {
padding-left: 2em;
}
table.list {
border-collapse: collapse;
width: 100%;
}
table.list tr:nth-child(even) {
background: rgba(127,127,127,0.1);]n}
table.list th {
border-right: 2px solid gray;
font-family: monospace;
padding: 5px 10px 5px 2px;
text-align: right;
vertical-align: top;
}
table.list td {
padding: 5px 2px 5px 10px;
text-align: left;
vertical-align: top;
}
h1.title {
}
h2.title {
border-bottom: solid 2px black;
}
h3.title {
border-bottom: solid 2px black;
}
--></style>
</head>
<body>
<div class="header">
<!--
Raster printer driver documentation for CUPS.
Copyright © 2007-2018 by Apple Inc.
Copyright © 1997-2007 by Easy Software Products.
Licensed under Apache License v2.0. See the file "LICENSE" for more
information.
-->
<h1 class='title'>Developing Raster Printer Drivers</h1>
<p>This document describes how to develop printer drivers for raster printers. Topics include: <a href='#BASICS'>printer driver basics</a>, <a href='#CREATE'>creating new PPD files</a>, <a href='#FILTERS'>using filters</a>, <a href='#COLOR'>implementing color management</a>, and <a href='#MACOSX'>adding macOS features</a>.</p>
<div class='summary'><table summary='General Information'>
<tbody>
<tr>
<th>See Also</th>
<td>Programming: <a href='postscript-driver.html'>Developing PostScript Printer Drivers</a><br>
Programming: <a href='api-filter.html'>Filter and Backend Programming</a><br>
Programming: <a href='ppd-compiler.html'>Introduction to the PPD Compiler</a><br>
Programming: <a href='api-raster.html'>Raster API</a><br>
References: <a href='ref-ppdcfile.html'>PPD Compiler Driver Information File Reference</a><br>
Specifications: <a href='spec-ppd.html'>CUPS PPD Extensions</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="contents">
<h2 class="title">Contents</h2>
<ul class="contents">
<li><a href="#BASICS">Printer Driver Basics</a></li>
<li><a href="#CREATING">Creating New PPD Files</a></li>
<li><a href="#FILTERS">Using Filters</a></li>
<li><a href="#COLOR">Implementing Color Management</a></li>
<li><a href="#MACOSX">Adding macOS Features</a></li>
</ul>
</div>
<div class="body">
<h2 class='title'><a name='BASICS'>Printer Driver Basics</a></h2>
<p>A CUPS raster printer driver consists of a PostScript Printer Description (PPD) file that describes the features and capabilities of the device, one or more <em>filter</em> programs that prepare print data for the device, and zero or more support files for color management, online help, and so forth. The PPD file includes references to all of the filters and support files used by the driver.</p>
<p>Every time a user prints something the scheduler program, <a href='man-cupsd.html'>cupsd(8)</a>, determines the format of the print job and the programs required to convert that job into something the printer understands. CUPS includes filter programs for many common formats, for example to convert Portable Document Format (PDF) files into CUPS raster data. <a href='#FIGURE_1'>Figure 1</a> shows the data flow of a typical print job.</p>
<div class='figure'><table summary='Raster Filter Chain'>
<caption>Figure 1: <a name='FIGURE_1'>Raster Filter Chain</a></caption>
<tr><td><img src='../images/cups-raster-chain.png' width='700' height='150' alt='Raster Filter Chain'></td></tr>
</table></div>
<p>The raster filter converts CUPS raster data into a format the printer understands, for example HP-PCL. CUPS includes several sample raster filters supporting standard page description languages (PDLs). <a href='#TABLE_1'>Table 1</a> shows the raster filters that are bundled with CUPS and the languages they support.</p>
<div class='table'><table summary='Standard CUPS Raster Filters'>
<caption>Table 1: <a name='TABLE_1'>Standard CUPS Raster Filters</a></caption>
<thead>
<tr><th>Filter</th><th>PDLs</th><th>ppdc DriverType</th><th>ppdc #include file</th></tr>
</thead>
<tbody>
<tr><td>rastertoepson</td><td>ESC/P, ESC/P2</td><td>epson</td><td>epson.h</td></tr>
<tr><td>rastertoescpx</td><td>ESC/P, ESC/P2, EPSON Remote Mode</td><td>escp</td><td>escp.h</td></tr>
<tr><td>rastertohp</td><td>HP-PCL3, HP-PCL5</td><td>hp</td><td>hp.h</td></tr>
<tr><td>rastertolabel</td><td>CPCL, Dymo, EPL1, EPL2, Intellitech PCL, ZPL</td><td>label</td><td>label.h</td></tr>
<tr><td>rastertopclx</td><td>HP-RTL, HP-PCL3, HP-PCL3GUI, HP-PCL5, HP-PCL5c, HP-PCL5e</td><td>pcl</td><td>pcl.h</td></tr>
</tbody>
</table></div>
<p>The optional port monitor handles interface-specific protocol or encoding issues. For example, some raster printers use the 1284.4 communications protocol.</p>
<p>The backend handles communications with the printer, sending print data from the last filter to the printer and relaying back-channel data from the printer to the upstream filters. CUPS includes backend programs for common direct-connect interfaces and network protocols, and you can provide your own backend to support custom interfaces and protocols.</p>
<p>The scheduler also supports a special "command" file format for sending maintenance commands and status queries to a printer or printer driver. Command print jobs typically use a single command filter program defined in the PPD file to generate the appropriate printer commands and handle any responses from the printer. <a href='#FIGURE_2'>Figure 2</a> shows the data flow of a typical command job.</p>
<div class='figure'><table summary='Command Filter Chain'>
<caption>Figure 2: <a name='FIGURE_2'>Command Filter Chain</a></caption>
<tr><td><img src='../images/cups-command-chain.png' width='575' height='150' alt='Command Filter Chain'></td></tr>
</table></div>
<p>Raster printer drivers must provide their own command filter.</p>
<h2 class='title'><a name='CREATING'>Creating New PPD Files</a></h2>
<p>We recommend using the CUPS PPD compiler, <a href='man-ppdc.html'>ppdc(1)</a>, to create new PPD files since it manages many of the tedious (and error-prone!) details of paper sizes and localization for you. It also allows you to easily support multiple devices from a single source file. For more information see the "<a href='ppd-compiler.html'>Introduction to the PPD Compiler</a>" document. <a href='#LISTING_1'>Listing 1</a> shows a driver information file for several similar black-and-white HP-PCL5 laser printers.</p>
<p class='example'>Listing 1: <a name='LISTING_1'>"examples/laserjet-basic.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>// Include HP-PCL driver definitions</I>
<a href='ref-ppdcfile.html#_include'>#include</a> <pcl.h>
<I>// Specify that this driver uses the HP-PCL driver...</I>
<a href='ref-ppdcfile.html#DriverType'>DriverType</a> pcl
<I>// Specify the driver options via the model number...</I>
<a href='ref-ppdcfile.html#ModelNumber'>ModelNumber</a> ($PCL_PAPER_SIZE $PCL_PJL $PCL_PJL_RESOLUTION)
<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 driver version</I>
<a href='ref-ppdcfile.html#Manufacturer'>Manufacturer</a> "HP"
<a href='ref-ppdcfile.html#Version'>Version</a> 1.0
<I>// Supported page sizes and their margins</I>
<a href='ref-ppdcfile.html#HWMargins'>HWMargins</a> 18 12 18 12
*<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Letter
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Legal
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Executive
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Monarch
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Statement
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> FanFoldGermanLegal
<a href='ref-ppdcfile.html#HWMargins'>HWMargins</a> 18 12.72 18 12.72
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Env10
<a href='ref-ppdcfile.html#HWMargins'>HWMargins</a> 9.72 12 9.72 12
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> A4
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> A5
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> B5
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> EnvC5
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> EnvDL
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> EnvISOB5
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> Postcard
<a href='ref-ppdcfile.html#MediaSize'>MediaSize</a> DoublePostcard
<I>// Only black-and-white output with mode 3 compression...</I>
<a href='ref-ppdcfile.html#ColorModel'>ColorModel</a> Gray k chunky 3
<I>// Supported resolutions</I>
<a href='ref-ppdcfile.html#Resolution'>Resolution</a> - 1 0 0 0 "300dpi/300 DPI"
*<a href='ref-ppdcfile.html#Resolution'>Resolution</a> - 8 0 0 0 "600dpi/600 DPI"
<I>// Supported input slots</I>
*<a href='ref-ppdcfile.html#InputSlot'>InputSlot</a> 7 "Auto/Automatic Selection"
<a href='ref-ppdcfile.html#InputSlot'>InputSlot</a> 2 "Manual/Tray 1 - Manual Feed"
<a href='ref-ppdcfile.html#InputSlot'>InputSlot</a> 4 "Upper/Tray 1"
<a href='ref-ppdcfile.html#InputSlot'>InputSlot</a> 1 "Lower/Tray 2"
<a href='ref-ppdcfile.html#InputSlot'>InputSlot</a> 5 "LargeCapacity/Tray 3"
<I>// Tray 3 is an option...</I>
<a href='ref-ppdcfile.html#Installable'>Installable</a> "OptionLargeCapacity/Tray 3 Installed"
<a href='ref-ppdcfile.html#UIConstraints'>UIConstraints</a> "*OptionLargeCapacity False *InputSlot LargeCapacity"
{
<I>// HP LaserJet 2100 Series</I>
<a href='ref-ppdcfile.html#Throughput'>Throughput</a> 10
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "LaserJet 2100 Series"
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "hpljt211.ppd"
}
{
<I>// LaserJet 2200 and 2300 series have duplexer option...</I>
<a href='ref-ppdcfile.html#Duplex'>Duplex</a> normal
<a href='ref-ppdcfile.html#Installable'>Installable</a> "OptionDuplex/Duplexer Installed"
<a href='ref-ppdcfile.html#UIConstraints'>UIConstraints</a> "*OptionDuplex False *Duplex"
{
<I>// HP LaserJet 2200 Series</I>
<a href='ref-ppdcfile.html#Throughput'>Throughput</a> 19
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "LaserJet 2200 Series"
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "hpljt221.ppd"
}
{
<I>// HP LaserJet 2300 Series</I>
<a href='ref-ppdcfile.html#Throughput'>Throughput</a> 25
<a href='ref-ppdcfile.html#ModelName'>ModelName</a> "LaserJet 2300 Series"
<a href='ref-ppdcfile.html#PCFileName'>PCFileName</a> "hpljt231.ppd"
}
}
</pre>
<h2 class='title'><a name='FILTERS'>Using Filters</a></h2>
<p>The standard CUPS raster filters can be specified using the
<a href='ref-ppdcfile.html#DriverType'><tt>DriverType</tt></a> directive, for example:</p>
<pre class='example'>
<I>// Specify that this driver uses the HP-PCL driver...</I>
<a href='ref-ppdcfile.html#DriverType'>DriverType</a> pcl
</pre>
<p><a href='#TABLE_1'>Table 1</a> shows the driver types for each of the standard CUPS raster filters. For drivers that do not use the standard raster filters, the "custom" type is used with <a href='ref-ppdcfile.html#Filter'><tt>Filter</tt></a> directives:</p>
<pre class='example'>
<a href='ref-ppdcfile.html#DriverType'>DriverType</a> custom
<a href='ref-ppdcfile.html#Filter'>Filter</a> application/vnd.cups-raster 100 /path/to/raster/filter
<a href='ref-ppdcfile.html#Filter'>Filter</a> application/vnd.cups-command 100 /path/to/command/filter
</pre>
<h2 class='title'><a name='COLOR'>Implementing Color Management</a></h2>
<p>CUPS uses ICC color profiles to provide more accurate color reproduction. The <a href='spec-ppd.html#cupsICCProfile'><tt>cupsICCProfile</tt></a> attribute defines the color profiles that are available for a given printer, for example:</p>
<pre class='example'>
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> cupsICCProfile "ColorModel.MediaType.Resolution/Description" /path/to/ICC/profile
</pre>
<p>where "ColorModel.MediaType.Resolution" defines a selector based on the corresponding option selections. A simple driver might only define profiles for the color models that are supported, for example a printer supporting Gray and RGB might use:</p>
<pre class='example'>
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> cupsICCProfile "Gray../Grayscale Profile" /path/to/ICC/gray-profile
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> cupsICCProfile "RGB../Full Color Profile" /path/to/ICC/rgb-profile
</pre>
<p>The options used for profile selection can be customized using the <tt>cupsICCQualifier2</tt> and <tt>cupsICCQualifier3</tt> attributes.</p>
<h3><span class='info'>Since macOS 10.5</span>Custom Color Matching Support</h3>
<p>macOS printer drivers that are based on an existing standard RGB colorspace can tell the system to use the corresponding colorspace instead of an arbitrary ICC color profile when doing color management. The <a href='#APCustom'><tt>APSupportsCustomColorMatching</tt></a> and <tt>APDefaultCustomColorMatchingProfile</tt> attributes can be used to enable this mode:</p>
<pre class='example'>
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> APSupportsCustomColorMatching "" true
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> APDefaultCustomColorMatchingProfile "" sRGB
</pre>
<h2 class='title'><a name='MACOSX'>Adding macOS Features</a></h2>
<p>macOS printer drivers can provide <a href='spec-ppd.html#MACOSX'>additional attributes</a> to specify additional option panes in the print dialog, an image of the printer, a help book, and option presets for the driver software:</p>
<pre class='example'>
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> APDialogExtension "" /Library/Printers/Vendor/filename.plugin
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> APHelpBook "" /Library/Printers/Vendor/filename.bundle
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> APPrinterIconPath "" /Library/Printers/Vendor/filename.icns
<a href='ref-ppdcfile.html#Attribute'>Attribute</a> APPrinterPreset "name/text" "*option choice ..."
</pre>
</div>
</body>
</html>
|
