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338 | <body> | |
339 | <div class='body'> | |
178cb736 MS |
340 | <!-- |
341 | "$Id: api-array.header 8087 2008-10-27 21:37:05Z mike $" | |
342 | ||
343 | Driver API header for CUPS. | |
344 | ||
345 | Copyright 2009 by Apple Inc. | |
346 | ||
347 | These coded instructions, statements, and computer programs are the | |
348 | property of Apple Inc. and are protected by Federal copyright | |
349 | law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
350 | which should have been included with this file. If this file is | |
351 | file is missing or damaged, see the license at "http://www.cups.org/". | |
352 | --> | |
353 | ||
354 | <h1 class='title'>Driver API</h1> | |
355 | ||
356 | <div class='summary'><table summary='General Information'> | |
357 | <thead> | |
358 | <tr> | |
359 | <th>Header</th> | |
360 | <th>cups/driver.h</th> | |
361 | </tr> | |
362 | </thead> | |
363 | <tbody> | |
364 | <tr> | |
365 | <th>Library</th> | |
366 | <td>-lcupsdriver</td> | |
367 | </tr> | |
368 | <tr> | |
369 | <th>See Also</th> | |
370 | <td>Programming: <a href='api-overview.html' target='_top'>Introduction to CUPS Programming</a></td> | |
371 | </tr> | |
372 | </tbody> | |
373 | </table></div> | |
f11a948a MS |
374 | <h2 class="title">Contents</h2> |
375 | <ul class="contents"> | |
178cb736 MS |
376 | <ul class="subcontents"> |
377 | <li><a href="#OVERVIEW">Overview</a></li> | |
f11a948a MS |
378 | <li><a href="#FUNCTIONS">Functions</a><ul class="code"> |
379 | <li><a href="#cupsCMYKDelete" title="Delete a color separation.">cupsCMYKDelete</a></li> | |
380 | <li><a href="#cupsCMYKDoBlack" title="Do a black separation...">cupsCMYKDoBlack</a></li> | |
381 | <li><a href="#cupsCMYKDoCMYK" title="Do a CMYK separation...">cupsCMYKDoCMYK</a></li> | |
382 | <li><a href="#cupsCMYKDoGray" title="Do a grayscale separation...">cupsCMYKDoGray</a></li> | |
383 | <li><a href="#cupsCMYKDoRGB" title="Do an sRGB separation...">cupsCMYKDoRGB</a></li> | |
384 | <li><a href="#cupsCMYKLoad" title="Load a CMYK color profile from PPD attributes.">cupsCMYKLoad</a></li> | |
385 | <li><a href="#cupsCMYKNew" title="Create a new CMYK color separation.">cupsCMYKNew</a></li> | |
386 | <li><a href="#cupsCMYKSetBlack" title="Set the transition range for CMY to black.">cupsCMYKSetBlack</a></li> | |
387 | <li><a href="#cupsCMYKSetCurve" title="Set a color transform curve using points.">cupsCMYKSetCurve</a></li> | |
388 | <li><a href="#cupsCMYKSetGamma" title="Set a color transform curve using gamma and density.">cupsCMYKSetGamma</a></li> | |
389 | <li><a href="#cupsCMYKSetInkLimit" title="Set the limit on the amount of ink.">cupsCMYKSetInkLimit</a></li> | |
390 | <li><a href="#cupsCMYKSetLtDk" title="Set light/dark ink transforms.">cupsCMYKSetLtDk</a></li> | |
391 | <li><a href="#cupsCheckBytes" title="Check to see if all bytes are zero.">cupsCheckBytes</a></li> | |
392 | <li><a href="#cupsCheckValue" title="Check to see if all bytes match the given value.">cupsCheckValue</a></li> | |
393 | <li><a href="#cupsDitherDelete" title="Free a dithering buffer.">cupsDitherDelete</a></li> | |
394 | <li><a href="#cupsDitherLine" title="Dither a line of pixels...">cupsDitherLine</a></li> | |
395 | <li><a href="#cupsDitherNew" title="Create an error-diffusion dithering buffer.">cupsDitherNew</a></li> | |
396 | <li><a href="#cupsFindAttr" title="Find a PPD attribute based on the colormodel, | |
397 | media, and resolution.">cupsFindAttr</a></li> | |
398 | <li><a href="#cupsLutDelete" title="Free the memory used by a lookup table.">cupsLutDelete</a></li> | |
399 | <li><a href="#cupsLutLoad" title="Load a LUT from a PPD file.">cupsLutLoad</a></li> | |
400 | <li><a href="#cupsLutNew" title="Make a lookup table from a list of pixel values.">cupsLutNew</a></li> | |
401 | <li><a href="#cupsPackHorizontal" title="Pack pixels horizontally...">cupsPackHorizontal</a></li> | |
402 | <li><a href="#cupsPackHorizontal2" title="Pack 2-bit pixels horizontally...">cupsPackHorizontal2</a></li> | |
403 | <li><a href="#cupsPackHorizontalBit" title="Pack pixels horizontally by bit...">cupsPackHorizontalBit</a></li> | |
404 | <li><a href="#cupsPackVertical" title="Pack pixels vertically...">cupsPackVertical</a></li> | |
405 | <li><a href="#cupsRGBDelete" title="Delete a color separation.">cupsRGBDelete</a></li> | |
406 | <li><a href="#cupsRGBDoGray" title="Do a grayscale separation...">cupsRGBDoGray</a></li> | |
407 | <li><a href="#cupsRGBDoRGB" title="Do a RGB separation...">cupsRGBDoRGB</a></li> | |
408 | <li><a href="#cupsRGBLoad" title="Load a RGB color profile from a PPD file.">cupsRGBLoad</a></li> | |
409 | <li><a href="#cupsRGBNew" title="Create a new RGB color separation.">cupsRGBNew</a></li> | |
410 | </ul></li> | |
411 | <li><a href="#TYPES">Data Types</a><ul class="code"> | |
412 | <li><a href="#cups_cmyk_t" title="Simple CMYK lookup table">cups_cmyk_t</a></li> | |
413 | <li><a href="#cups_dither_t" title="Dithering State">cups_dither_t</a></li> | |
414 | <li><a href="#cups_lut_t" title="Lookup Table for Dithering">cups_lut_t</a></li> | |
415 | <li><a href="#cups_rgb_t" title="Color separation lookup table">cups_rgb_t</a></li> | |
416 | <li><a href="#cups_sample_t" title="Color sample point">cups_sample_t</a></li> | |
417 | </ul></li> | |
418 | <li><a href="#STRUCTURES">Structures</a><ul class="code"> | |
419 | <li><a href="#cups_cmyk_s" title="Simple CMYK lookup table">cups_cmyk_s</a></li> | |
420 | <li><a href="#cups_dither_s" title="Dithering State">cups_dither_s</a></li> | |
421 | <li><a href="#cups_lut_s" title="Lookup Table for Dithering">cups_lut_s</a></li> | |
422 | <li><a href="#cups_rgb_s" title="Color separation lookup table">cups_rgb_s</a></li> | |
423 | <li><a href="#cups_sample_s" title="Color sample point">cups_sample_s</a></li> | |
424 | </ul></li> | |
425 | <li><a href="#VARIABLES">Variables</a><ul class="code"> | |
426 | <li><a href="#cups_scmy_lut[256]" title="sRGB gamma lookup table (inverted)">cups_scmy_lut[256]</a></li> | |
427 | <li><a href="#cups_srgb_lut[256]" title="sRGB gamma lookup table">cups_srgb_lut[256]</a></li> | |
428 | </ul></li> | |
178cb736 MS |
429 | <!-- |
430 | "$Id: api-array.shtml 7616 2008-05-28 00:34:13Z mike $" | |
431 | ||
432 | Driver API introduction for CUPS. | |
433 | ||
434 | Copyright 2009 by Apple Inc. | |
435 | ||
436 | These coded instructions, statements, and computer programs are the | |
437 | property of Apple Inc. and are protected by Federal copyright | |
438 | law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
439 | which should have been included with this file. If this file is | |
440 | file is missing or damaged, see the license at "http://www.cups.org/". | |
441 | --> | |
442 | ||
443 | <h2 class='title'><a name='OVERVIEW'>Overview</a></h2> | |
444 | ||
445 | <p>The driver API provides common dithering, color conversion, and utility | |
446 | functions for CUPS drivers.</p> | |
f11a948a MS |
447 | <h2 class="title"><a name="FUNCTIONS">Functions</a></h2> |
448 | <h3 class="function"><a name="cupsCMYKDelete">cupsCMYKDelete</a></h3> | |
449 | <p class="description">Delete a color separation.</p> | |
450 | <p class="code"> | |
451 | void cupsCMYKDelete (<br> | |
452 | <a href="#cups_cmyk_t">cups_cmyk_t</a> *cmyk<br> | |
453 | );</p> | |
454 | <h4 class="parameters">Parameters</h4> | |
455 | <dl> | |
456 | <dt>cmyk</dt> | |
457 | <dd class="description">Color separation</dd> | |
458 | </dl> | |
459 | <h3 class="function"><a name="cupsCMYKDoBlack">cupsCMYKDoBlack</a></h3> | |
460 | <p class="description">Do a black separation...</p> | |
461 | <p class="code"> | |
462 | void cupsCMYKDoBlack (<br> | |
463 | const <a href="#cups_cmyk_t">cups_cmyk_t</a> *cmyk,<br> | |
464 | const unsigned char *input,<br> | |
465 | short *output,<br> | |
466 | int num_pixels<br> | |
467 | );</p> | |
468 | <h4 class="parameters">Parameters</h4> | |
469 | <dl> | |
470 | <dt>cmyk</dt> | |
471 | <dd class="description">Color separation</dd> | |
472 | <dt>input</dt> | |
473 | <dd class="description">Input grayscale pixels</dd> | |
474 | <dt>output</dt> | |
475 | <dd class="description">Output Device-N pixels</dd> | |
476 | <dt>num_pixels</dt> | |
477 | <dd class="description">Number of pixels</dd> | |
478 | </dl> | |
479 | <h3 class="function"><a name="cupsCMYKDoCMYK">cupsCMYKDoCMYK</a></h3> | |
480 | <p class="description">Do a CMYK separation...</p> | |
481 | <p class="code"> | |
482 | void cupsCMYKDoCMYK (<br> | |
483 | const <a href="#cups_cmyk_t">cups_cmyk_t</a> *cmyk,<br> | |
484 | const unsigned char *input,<br> | |
485 | short *output,<br> | |
486 | int num_pixels<br> | |
487 | );</p> | |
488 | <h4 class="parameters">Parameters</h4> | |
489 | <dl> | |
490 | <dt>cmyk</dt> | |
491 | <dd class="description">Color separation</dd> | |
492 | <dt>input</dt> | |
493 | <dd class="description">Input grayscale pixels</dd> | |
494 | <dt>output</dt> | |
495 | <dd class="description">Output Device-N pixels</dd> | |
496 | <dt>num_pixels</dt> | |
497 | <dd class="description">Number of pixels</dd> | |
498 | </dl> | |
499 | <h3 class="function"><a name="cupsCMYKDoGray">cupsCMYKDoGray</a></h3> | |
500 | <p class="description">Do a grayscale separation...</p> | |
501 | <p class="code"> | |
502 | void cupsCMYKDoGray (<br> | |
503 | const <a href="#cups_cmyk_t">cups_cmyk_t</a> *cmyk,<br> | |
504 | const unsigned char *input,<br> | |
505 | short *output,<br> | |
506 | int num_pixels<br> | |
507 | );</p> | |
508 | <h4 class="parameters">Parameters</h4> | |
509 | <dl> | |
510 | <dt>cmyk</dt> | |
511 | <dd class="description">Color separation</dd> | |
512 | <dt>input</dt> | |
513 | <dd class="description">Input grayscale pixels</dd> | |
514 | <dt>output</dt> | |
515 | <dd class="description">Output Device-N pixels</dd> | |
516 | <dt>num_pixels</dt> | |
517 | <dd class="description">Number of pixels</dd> | |
518 | </dl> | |
519 | <h3 class="function"><a name="cupsCMYKDoRGB">cupsCMYKDoRGB</a></h3> | |
520 | <p class="description">Do an sRGB separation...</p> | |
521 | <p class="code"> | |
522 | void cupsCMYKDoRGB (<br> | |
523 | const <a href="#cups_cmyk_t">cups_cmyk_t</a> *cmyk,<br> | |
524 | const unsigned char *input,<br> | |
525 | short *output,<br> | |
526 | int num_pixels<br> | |
527 | );</p> | |
528 | <h4 class="parameters">Parameters</h4> | |
529 | <dl> | |
530 | <dt>cmyk</dt> | |
531 | <dd class="description">Color separation</dd> | |
532 | <dt>input</dt> | |
533 | <dd class="description">Input grayscale pixels</dd> | |
534 | <dt>output</dt> | |
535 | <dd class="description">Output Device-N pixels</dd> | |
536 | <dt>num_pixels</dt> | |
537 | <dd class="description">Number of pixels</dd> | |
538 | </dl> | |
539 | <h3 class="function"><a name="cupsCMYKLoad">cupsCMYKLoad</a></h3> | |
540 | <p class="description">Load a CMYK color profile from PPD attributes.</p> | |
541 | <p class="code"> | |
542 | <a href="#cups_cmyk_t">cups_cmyk_t</a> *cupsCMYKLoad (<br> | |
543 | ppd_file_t *ppd,<br> | |
544 | const char *colormodel,<br> | |
545 | const char *media,<br> | |
546 | const char *resolution<br> | |
547 | );</p> | |
548 | <h4 class="parameters">Parameters</h4> | |
549 | <dl> | |
550 | <dt>ppd</dt> | |
551 | <dd class="description">PPD file</dd> | |
552 | <dt>colormodel</dt> | |
553 | <dd class="description">ColorModel value</dd> | |
554 | <dt>media</dt> | |
555 | <dd class="description">MediaType value</dd> | |
556 | <dt>resolution</dt> | |
557 | <dd class="description">Resolution value</dd> | |
558 | </dl> | |
559 | <h4 class="returnvalue">Return Value</h4> | |
560 | <p class="description">CMYK color separation</p> | |
561 | <h3 class="function"><a name="cupsCMYKNew">cupsCMYKNew</a></h3> | |
562 | <p class="description">Create a new CMYK color separation.</p> | |
563 | <p class="code"> | |
564 | <a href="#cups_cmyk_t">cups_cmyk_t</a> *cupsCMYKNew (<br> | |
565 | int num_channels<br> | |
566 | );</p> | |
567 | <h4 class="parameters">Parameters</h4> | |
568 | <dl> | |
569 | <dt>num_channels</dt> | |
570 | <dd class="description">Number of color components</dd> | |
571 | </dl> | |
572 | <h4 class="returnvalue">Return Value</h4> | |
573 | <p class="description">New CMYK separation or NULL</p> | |
574 | <h3 class="function"><a name="cupsCMYKSetBlack">cupsCMYKSetBlack</a></h3> | |
575 | <p class="description">Set the transition range for CMY to black.</p> | |
576 | <p class="code"> | |
577 | void cupsCMYKSetBlack (<br> | |
578 | <a href="#cups_cmyk_t">cups_cmyk_t</a> *cmyk,<br> | |
579 | float lower,<br> | |
580 | float upper<br> | |
581 | );</p> | |
582 | <h4 class="parameters">Parameters</h4> | |
583 | <dl> | |
584 | <dt>cmyk</dt> | |
585 | <dd class="description">CMYK color separation</dd> | |
586 | <dt>lower</dt> | |
587 | <dd class="description">No black ink</dd> | |
588 | <dt>upper</dt> | |
589 | <dd class="description">Only black ink</dd> | |
590 | </dl> | |
591 | <h3 class="function"><a name="cupsCMYKSetCurve">cupsCMYKSetCurve</a></h3> | |
592 | <p class="description">Set a color transform curve using points.</p> | |
593 | <p class="code"> | |
594 | void cupsCMYKSetCurve (<br> | |
595 | <a href="#cups_cmyk_t">cups_cmyk_t</a> *cmyk,<br> | |
596 | int channel,<br> | |
597 | int num_xypoints,<br> | |
598 | const float *xypoints<br> | |
599 | );</p> | |
600 | <h4 class="parameters">Parameters</h4> | |
601 | <dl> | |
602 | <dt>cmyk</dt> | |
603 | <dd class="description">CMYK color separation</dd> | |
604 | <dt>channel</dt> | |
605 | <dd class="description">Color channel</dd> | |
606 | <dt>num_xypoints</dt> | |
607 | <dd class="description">Number of X,Y points</dd> | |
608 | <dt>xypoints</dt> | |
609 | <dd class="description">X,Y points</dd> | |
610 | </dl> | |
611 | <h3 class="function"><a name="cupsCMYKSetGamma">cupsCMYKSetGamma</a></h3> | |
612 | <p class="description">Set a color transform curve using gamma and density.</p> | |
613 | <p class="code"> | |
614 | void cupsCMYKSetGamma (<br> | |
615 | <a href="#cups_cmyk_t">cups_cmyk_t</a> *cmyk,<br> | |
616 | int channel,<br> | |
617 | float gamval,<br> | |
618 | float density<br> | |
619 | );</p> | |
620 | <h4 class="parameters">Parameters</h4> | |
621 | <dl> | |
622 | <dt>cmyk</dt> | |
623 | <dd class="description">CMYK color separation</dd> | |
624 | <dt>channel</dt> | |
625 | <dd class="description">Ink channel</dd> | |
626 | <dt>gamval</dt> | |
627 | <dd class="description">Gamma correction</dd> | |
628 | <dt>density</dt> | |
629 | <dd class="description">Maximum density</dd> | |
630 | </dl> | |
631 | <h3 class="function"><a name="cupsCMYKSetInkLimit">cupsCMYKSetInkLimit</a></h3> | |
632 | <p class="description">Set the limit on the amount of ink.</p> | |
633 | <p class="code"> | |
634 | void cupsCMYKSetInkLimit (<br> | |
635 | <a href="#cups_cmyk_t">cups_cmyk_t</a> *cmyk,<br> | |
636 | float limit<br> | |
637 | );</p> | |
638 | <h4 class="parameters">Parameters</h4> | |
639 | <dl> | |
640 | <dt>cmyk</dt> | |
641 | <dd class="description">CMYK color separation</dd> | |
642 | <dt>limit</dt> | |
643 | <dd class="description">Limit of ink</dd> | |
644 | </dl> | |
645 | <h3 class="function"><a name="cupsCMYKSetLtDk">cupsCMYKSetLtDk</a></h3> | |
646 | <p class="description">Set light/dark ink transforms.</p> | |
647 | <p class="code"> | |
648 | void cupsCMYKSetLtDk (<br> | |
649 | <a href="#cups_cmyk_t">cups_cmyk_t</a> *cmyk,<br> | |
650 | int channel,<br> | |
651 | float light,<br> | |
652 | float dark<br> | |
653 | );</p> | |
654 | <h4 class="parameters">Parameters</h4> | |
655 | <dl> | |
656 | <dt>cmyk</dt> | |
657 | <dd class="description">CMYK color separation</dd> | |
658 | <dt>channel</dt> | |
659 | <dd class="description">Dark ink channel (+1 for light)</dd> | |
660 | <dt>light</dt> | |
661 | <dd class="description">Light ink only level</dd> | |
662 | <dt>dark</dt> | |
663 | <dd class="description">Dark ink only level</dd> | |
664 | </dl> | |
665 | <h3 class="function"><a name="cupsCheckBytes">cupsCheckBytes</a></h3> | |
666 | <p class="description">Check to see if all bytes are zero.</p> | |
667 | <p class="code"> | |
668 | int cupsCheckBytes (<br> | |
669 | const unsigned char *bytes,<br> | |
670 | int length<br> | |
671 | );</p> | |
672 | <h4 class="parameters">Parameters</h4> | |
673 | <dl> | |
674 | <dt>bytes</dt> | |
675 | <dd class="description">Bytes to check</dd> | |
676 | <dt>length</dt> | |
677 | <dd class="description">Number of bytes to check</dd> | |
678 | </dl> | |
679 | <h4 class="returnvalue">Return Value</h4> | |
680 | <p class="description">1 if they match</p> | |
681 | <h3 class="function"><a name="cupsCheckValue">cupsCheckValue</a></h3> | |
682 | <p class="description">Check to see if all bytes match the given value.</p> | |
683 | <p class="code"> | |
684 | int cupsCheckValue (<br> | |
685 | const unsigned char *bytes,<br> | |
686 | int length,<br> | |
687 | const unsigned char value<br> | |
688 | );</p> | |
689 | <h4 class="parameters">Parameters</h4> | |
690 | <dl> | |
691 | <dt>bytes</dt> | |
692 | <dd class="description">Bytes to check</dd> | |
693 | <dt>length</dt> | |
694 | <dd class="description">Number of bytes to check</dd> | |
695 | <dt>value</dt> | |
696 | <dd class="description">Value to check</dd> | |
697 | </dl> | |
698 | <h4 class="returnvalue">Return Value</h4> | |
699 | <p class="description">1 if they match</p> | |
700 | <h3 class="function"><a name="cupsDitherDelete">cupsDitherDelete</a></h3> | |
701 | <p class="description">Free a dithering buffer.</p> | |
702 | <p class="code"> | |
703 | void cupsDitherDelete (<br> | |
704 | <a href="#cups_dither_t">cups_dither_t</a> *d<br> | |
705 | );</p> | |
706 | <h4 class="parameters">Parameters</h4> | |
707 | <dl> | |
708 | <dt>d</dt> | |
709 | <dd class="description">Dithering buffer</dd> | |
710 | </dl> | |
711 | <h4 class="discussion">Discussion</h4> | |
712 | <p class="discussion">Returns 0 on success, -1 on failure.</p> | |
713 | <h3 class="function"><a name="cupsDitherLine">cupsDitherLine</a></h3> | |
714 | <p class="description">Dither a line of pixels...</p> | |
715 | <p class="code"> | |
716 | void cupsDitherLine (<br> | |
717 | <a href="#cups_dither_t">cups_dither_t</a> *d,<br> | |
718 | const <a href="#cups_lut_t">cups_lut_t</a> *lut,<br> | |
719 | const short *data,<br> | |
720 | int num_channels,<br> | |
721 | unsigned char *p<br> | |
722 | );</p> | |
723 | <h4 class="parameters">Parameters</h4> | |
724 | <dl> | |
725 | <dt>d</dt> | |
726 | <dd class="description">Dither data</dd> | |
727 | <dt>lut</dt> | |
728 | <dd class="description">Lookup table</dd> | |
729 | <dt>data</dt> | |
730 | <dd class="description">Separation data</dd> | |
731 | <dt>num_channels</dt> | |
732 | <dd class="description">Number of components</dd> | |
733 | <dt>p</dt> | |
734 | <dd class="description">Pixels</dd> | |
735 | </dl> | |
736 | <h3 class="function"><a name="cupsDitherNew">cupsDitherNew</a></h3> | |
737 | <p class="description">Create an error-diffusion dithering buffer.</p> | |
738 | <p class="code"> | |
739 | <a href="#cups_dither_t">cups_dither_t</a> *cupsDitherNew (<br> | |
740 | int width<br> | |
741 | );</p> | |
742 | <h4 class="parameters">Parameters</h4> | |
743 | <dl> | |
744 | <dt>width</dt> | |
745 | <dd class="description">Width of output in pixels</dd> | |
746 | </dl> | |
747 | <h4 class="returnvalue">Return Value</h4> | |
748 | <p class="description">New state array</p> | |
749 | <h3 class="function"><a name="cupsFindAttr">cupsFindAttr</a></h3> | |
750 | <p class="description">Find a PPD attribute based on the colormodel, | |
751 | media, and resolution.</p> | |
752 | <p class="code"> | |
753 | ppd_attr_t *cupsFindAttr (<br> | |
754 | ppd_file_t *ppd,<br> | |
755 | const char *name,<br> | |
756 | const char *colormodel,<br> | |
757 | const char *media,<br> | |
758 | const char *resolution,<br> | |
759 | char *spec,<br> | |
760 | int specsize<br> | |
761 | );</p> | |
762 | <h4 class="parameters">Parameters</h4> | |
763 | <dl> | |
764 | <dt>ppd</dt> | |
765 | <dd class="description">PPD file</dd> | |
766 | <dt>name</dt> | |
767 | <dd class="description">Attribute name</dd> | |
768 | <dt>colormodel</dt> | |
769 | <dd class="description">Color model</dd> | |
770 | <dt>media</dt> | |
771 | <dd class="description">Media type</dd> | |
772 | <dt>resolution</dt> | |
773 | <dd class="description">Resolution</dd> | |
774 | <dt>spec</dt> | |
775 | <dd class="description">Final selection string</dd> | |
776 | <dt>specsize</dt> | |
777 | <dd class="description">Size of string buffer</dd> | |
778 | </dl> | |
779 | <h4 class="returnvalue">Return Value</h4> | |
780 | <p class="description">Matching attribute or NULL</p> | |
781 | <h3 class="function"><a name="cupsLutDelete">cupsLutDelete</a></h3> | |
782 | <p class="description">Free the memory used by a lookup table.</p> | |
783 | <p class="code"> | |
784 | void cupsLutDelete (<br> | |
785 | <a href="#cups_lut_t">cups_lut_t</a> *lut<br> | |
786 | );</p> | |
787 | <h4 class="parameters">Parameters</h4> | |
788 | <dl> | |
789 | <dt>lut</dt> | |
790 | <dd class="description">Lookup table to free</dd> | |
791 | </dl> | |
792 | <h3 class="function"><a name="cupsLutLoad">cupsLutLoad</a></h3> | |
793 | <p class="description">Load a LUT from a PPD file.</p> | |
794 | <p class="code"> | |
795 | <a href="#cups_lut_t">cups_lut_t</a> *cupsLutLoad (<br> | |
796 | ppd_file_t *ppd,<br> | |
797 | const char *colormodel,<br> | |
798 | const char *media,<br> | |
799 | const char *resolution,<br> | |
800 | const char *ink<br> | |
801 | );</p> | |
802 | <h4 class="parameters">Parameters</h4> | |
803 | <dl> | |
804 | <dt>ppd</dt> | |
805 | <dd class="description">PPD file</dd> | |
806 | <dt>colormodel</dt> | |
807 | <dd class="description">Color model</dd> | |
808 | <dt>media</dt> | |
809 | <dd class="description">Media type</dd> | |
810 | <dt>resolution</dt> | |
811 | <dd class="description">Resolution</dd> | |
812 | <dt>ink</dt> | |
813 | <dd class="description">Ink name</dd> | |
814 | </dl> | |
815 | <h4 class="returnvalue">Return Value</h4> | |
816 | <p class="description">New lookup table</p> | |
817 | <h3 class="function"><a name="cupsLutNew">cupsLutNew</a></h3> | |
818 | <p class="description">Make a lookup table from a list of pixel values.</p> | |
819 | <p class="code"> | |
820 | <a href="#cups_lut_t">cups_lut_t</a> *cupsLutNew (<br> | |
821 | int num_values,<br> | |
822 | const float *values<br> | |
823 | );</p> | |
824 | <h4 class="parameters">Parameters</h4> | |
825 | <dl> | |
826 | <dt>num_values</dt> | |
827 | <dd class="description">Number of values</dd> | |
828 | <dt>values</dt> | |
829 | <dd class="description">Lookup table values</dd> | |
830 | </dl> | |
831 | <h4 class="returnvalue">Return Value</h4> | |
832 | <p class="description">New lookup table</p> | |
833 | <h4 class="discussion">Discussion</h4> | |
834 | <p class="discussion">Returns a pointer to the lookup table on success, NULL on failure.</p> | |
835 | <h3 class="function"><a name="cupsPackHorizontal">cupsPackHorizontal</a></h3> | |
836 | <p class="description">Pack pixels horizontally...</p> | |
837 | <p class="code"> | |
838 | void cupsPackHorizontal (<br> | |
839 | const unsigned char *ipixels,<br> | |
840 | unsigned char *obytes,<br> | |
841 | int width,<br> | |
842 | const unsigned char clearto,<br> | |
843 | const int step<br> | |
844 | );</p> | |
845 | <h4 class="parameters">Parameters</h4> | |
846 | <dl> | |
847 | <dt>ipixels</dt> | |
848 | <dd class="description">Input pixels</dd> | |
849 | <dt>obytes</dt> | |
850 | <dd class="description">Output bytes</dd> | |
851 | <dt>width</dt> | |
852 | <dd class="description">Number of pixels</dd> | |
853 | <dt>clearto</dt> | |
854 | <dd class="description">Initial value of bytes</dd> | |
855 | <dt>step</dt> | |
856 | <dd class="description">Step value between pixels</dd> | |
857 | </dl> | |
858 | <h3 class="function"><a name="cupsPackHorizontal2">cupsPackHorizontal2</a></h3> | |
859 | <p class="description">Pack 2-bit pixels horizontally...</p> | |
860 | <p class="code"> | |
861 | void cupsPackHorizontal2 (<br> | |
862 | const unsigned char *ipixels,<br> | |
863 | unsigned char *obytes,<br> | |
864 | int width,<br> | |
865 | const int step<br> | |
866 | );</p> | |
867 | <h4 class="parameters">Parameters</h4> | |
868 | <dl> | |
869 | <dt>ipixels</dt> | |
870 | <dd class="description">Input pixels</dd> | |
871 | <dt>obytes</dt> | |
872 | <dd class="description">Output bytes</dd> | |
873 | <dt>width</dt> | |
874 | <dd class="description">Number of pixels</dd> | |
875 | <dt>step</dt> | |
876 | <dd class="description">Stepping value</dd> | |
877 | </dl> | |
878 | <h3 class="function"><a name="cupsPackHorizontalBit">cupsPackHorizontalBit</a></h3> | |
879 | <p class="description">Pack pixels horizontally by bit...</p> | |
880 | <p class="code"> | |
881 | void cupsPackHorizontalBit (<br> | |
882 | const unsigned char *ipixels,<br> | |
883 | unsigned char *obytes,<br> | |
884 | int width,<br> | |
885 | const unsigned char clearto,<br> | |
886 | const unsigned char bit<br> | |
887 | );</p> | |
888 | <h4 class="parameters">Parameters</h4> | |
889 | <dl> | |
890 | <dt>ipixels</dt> | |
891 | <dd class="description">Input pixels</dd> | |
892 | <dt>obytes</dt> | |
893 | <dd class="description">Output bytes</dd> | |
894 | <dt>width</dt> | |
895 | <dd class="description">Number of pixels</dd> | |
896 | <dt>clearto</dt> | |
897 | <dd class="description">Initial value of bytes</dd> | |
898 | <dt>bit</dt> | |
899 | <dd class="description">Bit to check</dd> | |
900 | </dl> | |
901 | <h3 class="function"><a name="cupsPackVertical">cupsPackVertical</a></h3> | |
902 | <p class="description">Pack pixels vertically...</p> | |
903 | <p class="code"> | |
904 | void cupsPackVertical (<br> | |
905 | const unsigned char *ipixels,<br> | |
906 | unsigned char *obytes,<br> | |
907 | int width,<br> | |
908 | const unsigned char bit,<br> | |
909 | const int step<br> | |
910 | );</p> | |
911 | <h4 class="parameters">Parameters</h4> | |
912 | <dl> | |
913 | <dt>ipixels</dt> | |
914 | <dd class="description">Input pixels</dd> | |
915 | <dt>obytes</dt> | |
916 | <dd class="description">Output bytes</dd> | |
917 | <dt>width</dt> | |
918 | <dd class="description">Number of input pixels</dd> | |
919 | <dt>bit</dt> | |
920 | <dd class="description">Output bit</dd> | |
921 | <dt>step</dt> | |
922 | <dd class="description">Number of bytes between columns</dd> | |
923 | </dl> | |
924 | <h3 class="function"><a name="cupsRGBDelete">cupsRGBDelete</a></h3> | |
925 | <p class="description">Delete a color separation.</p> | |
926 | <p class="code"> | |
927 | void cupsRGBDelete (<br> | |
928 | <a href="#cups_rgb_t">cups_rgb_t</a> *rgbptr<br> | |
929 | );</p> | |
930 | <h4 class="parameters">Parameters</h4> | |
931 | <dl> | |
932 | <dt>rgbptr</dt> | |
933 | <dd class="description">Color separation</dd> | |
934 | </dl> | |
935 | <h3 class="function"><a name="cupsRGBDoGray">cupsRGBDoGray</a></h3> | |
936 | <p class="description">Do a grayscale separation...</p> | |
937 | <p class="code"> | |
938 | void cupsRGBDoGray (<br> | |
939 | <a href="#cups_rgb_t">cups_rgb_t</a> *rgbptr,<br> | |
940 | const unsigned char *input,<br> | |
941 | unsigned char *output,<br> | |
942 | int num_pixels<br> | |
943 | );</p> | |
944 | <h4 class="parameters">Parameters</h4> | |
945 | <dl> | |
946 | <dt>rgbptr</dt> | |
947 | <dd class="description">Color separation</dd> | |
948 | <dt>input</dt> | |
949 | <dd class="description">Input grayscale pixels</dd> | |
950 | <dt>output</dt> | |
951 | <dd class="description">Output Device-N pixels</dd> | |
952 | <dt>num_pixels</dt> | |
953 | <dd class="description">Number of pixels</dd> | |
954 | </dl> | |
955 | <h3 class="function"><a name="cupsRGBDoRGB">cupsRGBDoRGB</a></h3> | |
956 | <p class="description">Do a RGB separation...</p> | |
957 | <p class="code"> | |
958 | void cupsRGBDoRGB (<br> | |
959 | <a href="#cups_rgb_t">cups_rgb_t</a> *rgbptr,<br> | |
960 | const unsigned char *input,<br> | |
961 | unsigned char *output,<br> | |
962 | int num_pixels<br> | |
963 | );</p> | |
964 | <h4 class="parameters">Parameters</h4> | |
965 | <dl> | |
966 | <dt>rgbptr</dt> | |
967 | <dd class="description">Color separation</dd> | |
968 | <dt>input</dt> | |
969 | <dd class="description">Input RGB pixels</dd> | |
970 | <dt>output</dt> | |
971 | <dd class="description">Output Device-N pixels</dd> | |
972 | <dt>num_pixels</dt> | |
973 | <dd class="description">Number of pixels</dd> | |
974 | </dl> | |
975 | <h3 class="function"><a name="cupsRGBLoad">cupsRGBLoad</a></h3> | |
976 | <p class="description">Load a RGB color profile from a PPD file.</p> | |
977 | <p class="code"> | |
978 | <a href="#cups_rgb_t">cups_rgb_t</a> *cupsRGBLoad (<br> | |
979 | ppd_file_t *ppd,<br> | |
980 | const char *colormodel,<br> | |
981 | const char *media,<br> | |
982 | const char *resolution<br> | |
983 | );</p> | |
984 | <h4 class="parameters">Parameters</h4> | |
985 | <dl> | |
986 | <dt>ppd</dt> | |
987 | <dd class="description">PPD file</dd> | |
988 | <dt>colormodel</dt> | |
989 | <dd class="description">Color model</dd> | |
990 | <dt>media</dt> | |
991 | <dd class="description">Media type</dd> | |
992 | <dt>resolution</dt> | |
993 | <dd class="description">Resolution</dd> | |
994 | </dl> | |
995 | <h4 class="returnvalue">Return Value</h4> | |
996 | <p class="description">New color profile</p> | |
997 | <h3 class="function"><a name="cupsRGBNew">cupsRGBNew</a></h3> | |
998 | <p class="description">Create a new RGB color separation.</p> | |
999 | <p class="code"> | |
1000 | <a href="#cups_rgb_t">cups_rgb_t</a> *cupsRGBNew (<br> | |
1001 | int num_samples,<br> | |
1002 | <a href="#cups_sample_t">cups_sample_t</a> *samples,<br> | |
1003 | int cube_size,<br> | |
1004 | int num_channels<br> | |
1005 | );</p> | |
1006 | <h4 class="parameters">Parameters</h4> | |
1007 | <dl> | |
1008 | <dt>num_samples</dt> | |
1009 | <dd class="description">Number of samples</dd> | |
1010 | <dt>samples</dt> | |
1011 | <dd class="description">Samples</dd> | |
1012 | <dt>cube_size</dt> | |
1013 | <dd class="description">Size of LUT cube</dd> | |
1014 | <dt>num_channels</dt> | |
1015 | <dd class="description">Number of color components</dd> | |
1016 | </dl> | |
1017 | <h4 class="returnvalue">Return Value</h4> | |
1018 | <p class="description">New color separation or NULL</p> | |
1019 | <h2 class="title"><a name="TYPES">Data Types</a></h2> | |
1020 | <h3 class="typedef"><a name="cups_cmyk_t">cups_cmyk_t</a></h3> | |
1021 | <p class="description">Simple CMYK lookup table</p> | |
1022 | <p class="code"> | |
1023 | typedef struct <a href="#cups_cmyk_s">cups_cmyk_s</a> cups_cmyk_t; | |
1024 | </p> | |
1025 | <h3 class="typedef"><a name="cups_dither_t">cups_dither_t</a></h3> | |
1026 | <p class="description">Dithering State</p> | |
1027 | <p class="code"> | |
1028 | typedef struct <a href="#cups_dither_s">cups_dither_s</a> cups_dither_t; | |
1029 | </p> | |
1030 | <h3 class="typedef"><a name="cups_lut_t">cups_lut_t</a></h3> | |
1031 | <p class="description">Lookup Table for Dithering</p> | |
1032 | <p class="code"> | |
1033 | typedef struct <a href="#cups_lut_s">cups_lut_s</a> cups_lut_t; | |
1034 | </p> | |
1035 | <h3 class="typedef"><a name="cups_rgb_t">cups_rgb_t</a></h3> | |
1036 | <p class="description">Color separation lookup table</p> | |
1037 | <p class="code"> | |
1038 | typedef struct <a href="#cups_rgb_s">cups_rgb_s</a> cups_rgb_t; | |
1039 | </p> | |
1040 | <h3 class="typedef"><a name="cups_sample_t">cups_sample_t</a></h3> | |
1041 | <p class="description">Color sample point</p> | |
1042 | <p class="code"> | |
1043 | typedef struct <a href="#cups_sample_s">cups_sample_s</a> cups_sample_t; | |
1044 | </p> | |
1045 | <h2 class="title"><a name="STRUCTURES">Structures</a></h2> | |
1046 | <h3 class="struct"><a name="cups_cmyk_s">cups_cmyk_s</a></h3> | |
1047 | <p class="description">Simple CMYK lookup table</p> | |
1048 | <p class="code">struct cups_cmyk_s {<br> | |
1049 | unsigned char black_lut[256];<br> | |
1050 | short *channels[CUPS_MAX_CHAN];<br> | |
1051 | unsigned char color_lut[256];<br> | |
1052 | int ink_limit;<br> | |
1053 | int num_channels;<br> | |
1054 | };</p> | |
1055 | <h4 class="members">Members</h4> | |
1056 | <dl> | |
1057 | <dt>black_lut[256] </dt> | |
1058 | <dd class="description">Black generation LUT</dd> | |
1059 | <dt>channels[CUPS_MAX_CHAN] </dt> | |
1060 | <dd class="description">Lookup tables</dd> | |
1061 | <dt>color_lut[256] </dt> | |
1062 | <dd class="description">Color removal LUT</dd> | |
1063 | <dt>ink_limit </dt> | |
1064 | <dd class="description">Ink limit</dd> | |
1065 | <dt>num_channels </dt> | |
1066 | <dd class="description">Number of components</dd> | |
1067 | </dl> | |
1068 | <h3 class="struct"><a name="cups_dither_s">cups_dither_s</a></h3> | |
1069 | <p class="description">Dithering State</p> | |
1070 | <p class="code">struct cups_dither_s {<br> | |
1071 | int errors[96];<br> | |
1072 | int row;<br> | |
1073 | int width;<br> | |
1074 | };</p> | |
1075 | <h4 class="members">Members</h4> | |
1076 | <dl> | |
1077 | <dt>errors[96] </dt> | |
1078 | <dd class="description">Error values</dd> | |
1079 | <dt>row </dt> | |
1080 | <dd class="description">Current row</dd> | |
1081 | <dt>width </dt> | |
1082 | <dd class="description">Width of buffer</dd> | |
1083 | </dl> | |
1084 | <h3 class="struct"><a name="cups_lut_s">cups_lut_s</a></h3> | |
1085 | <p class="description">Lookup Table for Dithering</p> | |
1086 | <p class="code">struct cups_lut_s {<br> | |
1087 | int error;<br> | |
1088 | short intensity;<br> | |
1089 | short pixel;<br> | |
1090 | };</p> | |
1091 | <h4 class="members">Members</h4> | |
1092 | <dl> | |
1093 | <dt>error </dt> | |
1094 | <dd class="description">Error from desired value</dd> | |
1095 | <dt>intensity </dt> | |
1096 | <dd class="description">Adjusted intensity</dd> | |
1097 | <dt>pixel </dt> | |
1098 | <dd class="description">Output pixel value</dd> | |
1099 | </dl> | |
1100 | <h3 class="struct"><a name="cups_rgb_s">cups_rgb_s</a></h3> | |
1101 | <p class="description">Color separation lookup table</p> | |
1102 | <p class="code">struct cups_rgb_s {<br> | |
1103 | unsigned char black[CUPS_MAX_RGB];<br> | |
1104 | int cache_init;<br> | |
1105 | unsigned char ****colors;<br> | |
1106 | int cube_index[256];<br> | |
1107 | int cube_mult[256];<br> | |
1108 | int cube_size;<br> | |
1109 | int num_channels;<br> | |
1110 | unsigned char white[CUPS_MAX_RGB];<br> | |
1111 | };</p> | |
1112 | <h4 class="members">Members</h4> | |
1113 | <dl> | |
1114 | <dt>black[CUPS_MAX_RGB] </dt> | |
1115 | <dd class="description">Cached black (sRGB = 0,0,0)</dd> | |
1116 | <dt>cache_init </dt> | |
1117 | <dd class="description">Are cached values initialized?</dd> | |
1118 | <dt>colors </dt> | |
1119 | <dd class="description">4-D array of sample values</dd> | |
1120 | <dt>cube_index[256] </dt> | |
1121 | <dd class="description">Index into cube for a given sRGB value</dd> | |
1122 | <dt>cube_mult[256] </dt> | |
1123 | <dd class="description">Multiplier value for a given sRGB value</dd> | |
1124 | <dt>cube_size </dt> | |
1125 | <dd class="description">Size of color cube (2-N) on a side</dd> | |
1126 | <dt>num_channels </dt> | |
1127 | <dd class="description">Number of colors per sample</dd> | |
1128 | <dt>white[CUPS_MAX_RGB] </dt> | |
1129 | <dd class="description">Cached white (sRGB = 255,255,255)</dd> | |
1130 | </dl> | |
1131 | <h3 class="struct"><a name="cups_sample_s">cups_sample_s</a></h3> | |
1132 | <p class="description">Color sample point</p> | |
1133 | <p class="code">struct cups_sample_s {<br> | |
1134 | unsigned char colors[CUPS_MAX_RGB];<br> | |
1135 | unsigned char rgb[3];<br> | |
1136 | };</p> | |
1137 | <h4 class="members">Members</h4> | |
1138 | <dl> | |
1139 | <dt>colors[CUPS_MAX_RGB] </dt> | |
1140 | <dd class="description">Color values</dd> | |
1141 | <dt>rgb[3] </dt> | |
1142 | <dd class="description">sRGB values</dd> | |
1143 | </dl> | |
1144 | <h2 class="title"><a name="VARIABLES">Variables</a></h2> | |
1145 | <h3 class="variable"><a name="cups_scmy_lut[256]">cups_scmy_lut[256]</a></h3> | |
1146 | <p class="description">sRGB gamma lookup table (inverted)</p> | |
1147 | <p class="code">extern const unsigned char cups_scmy_lut[256];</p> | |
1148 | <h3 class="variable"><a name="cups_srgb_lut[256]">cups_srgb_lut[256]</a></h3> | |
1149 | <p class="description">sRGB gamma lookup table</p> | |
1150 | <p class="code">extern const unsigned char cups_srgb_lut[256];</p> | |
1151 | </div> | |
1152 | </body> | |
1153 | </html> |