4 * Raster file routines for CUPS.
6 * Copyright 2007-2012 by Apple Inc.
7 * Copyright 1997-2006 by Easy Software Products.
9 * This file is part of the CUPS Imaging library.
11 * These coded instructions, statements, and computer programs are the
12 * property of Apple Inc. and are protected by Federal copyright
13 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
14 * which should have been included with this file. If this file is
15 * file is missing or damaged, see the license at "http://www.cups.org/".
17 * This file is subject to the Apple OS-Developed Software exception.
21 * cupsRasterClose() - Close a raster stream.
22 * cupsRasterOpen() - Open a raster stream using a file descriptor.
23 * cupsRasterOpenIO() - Open a raster stream using a callback function.
24 * cupsRasterReadHeader() - Read a raster page header and store it in a
25 * version 1 page header structure.
26 * cupsRasterReadHeader2() - Read a raster page header and store it in a
27 * version 2 page header structure.
28 * cupsRasterReadPixels() - Read raster pixels.
29 * cupsRasterWriteHeader() - Write a raster page header from a version 1
30 * page header structure.
31 * cupsRasterWriteHeader2() - Write a raster page header from a version 2
32 * page header structure.
33 * cupsRasterWritePixels() - Write raster pixels.
34 * cups_raster_read_header() - Read a raster page header.
35 * cups_raster_read() - Read through the raster buffer.
36 * cups_raster_update() - Update the raster header and row count for the
38 * cups_raster_write() - Write a row of compressed raster data...
39 * cups_read_fd() - Read bytes from a file.
40 * cups_swap() - Swap bytes in raster data...
41 * cups_write_fd() - Write bytes to a file.
45 * Include necessary headers...
48 #include <cups/raster-private.h>
51 #endif /* HAVE_STDINT_H */
55 * Private structures...
58 struct _cups_raster_s
/**** Raster stream data ****/
60 unsigned sync
; /* Sync word from start of stream */
61 void *ctx
; /* File descriptor */
62 cups_raster_iocb_t iocb
; /* IO callback */
63 cups_mode_t mode
; /* Read/write mode */
64 cups_page_header2_t header
; /* Raster header for current page */
65 int count
, /* Current row run-length count */
66 remaining
, /* Remaining rows in page image */
67 bpp
; /* Bytes per pixel/color */
68 unsigned char *pixels
, /* Pixels for current row */
69 *pend
, /* End of pixel buffer */
70 *pcurrent
; /* Current byte in pixel buffer */
71 int compressed
, /* Non-zero if data is compressed */
72 swapped
; /* Non-zero if data is byte-swapped */
73 unsigned char *buffer
, /* Read/write buffer */
74 *bufptr
, /* Current (read) position in buffer */
75 *bufend
; /* End of current (read) buffer */
76 size_t bufsize
; /* Buffer size */
84 static int cups_raster_io(cups_raster_t
*r
, unsigned char *buf
, int bytes
);
85 static unsigned cups_raster_read_header(cups_raster_t
*r
);
86 static int cups_raster_read(cups_raster_t
*r
, unsigned char *buf
,
88 static void cups_raster_update(cups_raster_t
*r
);
89 static int cups_raster_write(cups_raster_t
*r
,
90 const unsigned char *pixels
);
91 static ssize_t
cups_read_fd(void *ctx
, unsigned char *buf
, size_t bytes
);
92 static void cups_swap(unsigned char *buf
, int bytes
);
93 static ssize_t
cups_write_fd(void *ctx
, unsigned char *buf
, size_t bytes
);
97 * 'cupsRasterClose()' - Close a raster stream.
99 * The file descriptor associated with the raster stream must be closed
100 * separately as needed.
104 cupsRasterClose(cups_raster_t
*r
) /* I - Stream to close */
120 * 'cupsRasterOpen()' - Open a raster stream using a file descriptor.
122 * This function associates a raster stream with the given file descriptor.
123 * For most printer driver filters, "fd" will be 0 (stdin). For most raster
124 * image processor (RIP) filters that generate raster data, "fd" will be 1
127 * When writing raster data, the @code CUPS_RASTER_WRITE@,
128 * @code CUPS_RASTER_WRITE_COMPRESS@, or @code CUPS_RASTER_WRITE_PWG@ mode can
129 * be used - compressed and PWG output is generally 25-50% smaller but adds a
130 * 100-300% execution time overhead.
133 cups_raster_t
* /* O - New stream */
134 cupsRasterOpen(int fd
, /* I - File descriptor */
135 cups_mode_t mode
) /* I - Mode - @code CUPS_RASTER_READ@,
136 @code CUPS_RASTER_WRITE@,
137 @code CUPS_RASTER_WRITE_COMPRESSED@,
138 or @code CUPS_RASTER_WRITE_PWG@ */
140 if (mode
== CUPS_RASTER_READ
)
141 return (cupsRasterOpenIO(cups_read_fd
, (void *)((intptr_t)fd
), mode
));
143 return (cupsRasterOpenIO(cups_write_fd
, (void *)((intptr_t)fd
), mode
));
148 * 'cupsRasterOpenIO()' - Open a raster stream using a callback function.
150 * This function associates a raster stream with the given callback function and
153 * When writing raster data, the @code CUPS_RASTER_WRITE@,
154 * @code CUPS_RASTER_WRITE_COMPRESS@, or @code CUPS_RASTER_WRITE_PWG@ mode can
155 * be used - compressed and PWG output is generally 25-50% smaller but adds a
156 * 100-300% execution time overhead.
159 cups_raster_t
* /* O - New stream */
161 cups_raster_iocb_t iocb
, /* I - Read/write callback */
162 void *ctx
, /* I - Context pointer for callback */
163 cups_mode_t mode
) /* I - Mode - @code CUPS_RASTER_READ@,
164 @code CUPS_RASTER_WRITE@,
165 @code CUPS_RASTER_WRITE_COMPRESSED@,
166 or @code CUPS_RASTER_WRITE_PWG@ */
168 cups_raster_t
*r
; /* New stream */
171 _cupsRasterClearError();
173 if ((r
= calloc(sizeof(cups_raster_t
), 1)) == NULL
)
175 _cupsRasterAddError("Unable to allocate memory for raster stream: %s\n",
184 if (mode
== CUPS_RASTER_READ
)
187 * Open for read - get sync word...
190 if (cups_raster_io(r
, (unsigned char *)&(r
->sync
), sizeof(r
->sync
)) !=
193 _cupsRasterAddError("Unable to read header from raster stream: %s\n",
199 if (r
->sync
!= CUPS_RASTER_SYNC
&&
200 r
->sync
!= CUPS_RASTER_REVSYNC
&&
201 r
->sync
!= CUPS_RASTER_SYNCv1
&&
202 r
->sync
!= CUPS_RASTER_REVSYNCv1
&&
203 r
->sync
!= CUPS_RASTER_SYNCv2
&&
204 r
->sync
!= CUPS_RASTER_REVSYNCv2
)
206 _cupsRasterAddError("Unknown raster format %08x!\n", r
->sync
);
211 if (r
->sync
== CUPS_RASTER_SYNCv2
||
212 r
->sync
== CUPS_RASTER_REVSYNCv2
)
215 if (r
->sync
== CUPS_RASTER_REVSYNC
||
216 r
->sync
== CUPS_RASTER_REVSYNCv1
||
217 r
->sync
== CUPS_RASTER_REVSYNCv2
)
220 DEBUG_printf(("r->swapped=%d, r->sync=%08x\n", r
->swapped
, r
->sync
));
225 * Open for write - put sync word...
231 case CUPS_RASTER_WRITE
:
232 r
->sync
= CUPS_RASTER_SYNC
;
235 case CUPS_RASTER_WRITE_COMPRESSED
:
237 r
->sync
= CUPS_RASTER_SYNCv2
;
240 case CUPS_RASTER_WRITE_PWG
:
242 r
->sync
= htonl(CUPS_RASTER_SYNC_PWG
);
243 r
->swapped
= r
->sync
!= CUPS_RASTER_SYNC_PWG
;
247 if (cups_raster_io(r
, (unsigned char *)&(r
->sync
), sizeof(r
->sync
))
250 _cupsRasterAddError("Unable to write raster stream header: %s\n",
262 * 'cupsRasterReadHeader()' - Read a raster page header and store it in a
263 * version 1 page header structure.
265 * This function is deprecated. Use @link cupsRasterReadHeader2@ instead.
267 * Version 1 page headers were used in CUPS 1.0 and 1.1 and contain a subset
268 * of the version 2 page header data. This function handles reading version 2
269 * page headers and copying only the version 1 data into the provided buffer.
274 unsigned /* O - 1 on success, 0 on failure/end-of-file */
275 cupsRasterReadHeader(
276 cups_raster_t
*r
, /* I - Raster stream */
277 cups_page_header_t
*h
) /* I - Pointer to header data */
280 * Get the raster header...
283 if (!cups_raster_read_header(r
))
287 * Copy the header to the user-supplied buffer...
290 memcpy(h
, &(r
->header
), sizeof(cups_page_header_t
));
297 * 'cupsRasterReadHeader2()' - Read a raster page header and store it in a
298 * version 2 page header structure.
300 * @since CUPS 1.2/OS X 10.5@
303 unsigned /* O - 1 on success, 0 on failure/end-of-file */
304 cupsRasterReadHeader2(
305 cups_raster_t
*r
, /* I - Raster stream */
306 cups_page_header2_t
*h
) /* I - Pointer to header data */
309 * Get the raster header...
312 if (!cups_raster_read_header(r
))
316 * Copy the header to the user-supplied buffer...
319 memcpy(h
, &(r
->header
), sizeof(cups_page_header2_t
));
326 * 'cupsRasterReadPixels()' - Read raster pixels.
328 * For best performance, filters should read one or more whole lines.
329 * The "cupsBytesPerLine" value from the page header can be used to allocate
330 * the line buffer and as the number of bytes to read.
333 unsigned /* O - Number of bytes read */
334 cupsRasterReadPixels(cups_raster_t
*r
, /* I - Raster stream */
335 unsigned char *p
, /* I - Pointer to pixel buffer */
336 unsigned len
) /* I - Number of bytes to read */
338 int bytes
; /* Bytes read */
339 unsigned cupsBytesPerLine
; /* cupsBytesPerLine value */
340 unsigned remaining
; /* Bytes remaining */
341 unsigned char *ptr
, /* Pointer to read buffer */
342 byte
, /* Byte from file */
343 *temp
; /* Pointer into buffer */
344 int count
; /* Repetition count */
347 if (r
== NULL
|| r
->mode
!= CUPS_RASTER_READ
|| r
->remaining
== 0 ||
348 r
->header
.cupsBytesPerLine
== 0)
354 * Read without compression...
357 r
->remaining
-= len
/ r
->header
.cupsBytesPerLine
;
359 if (cups_raster_io(r
, p
, len
) < (ssize_t
)len
)
363 * Swap bytes as needed...
367 (r
->header
.cupsBitsPerColor
== 16 ||
368 r
->header
.cupsBitsPerPixel
== 12 ||
369 r
->header
.cupsBitsPerPixel
== 16))
380 * Read compressed data...
384 cupsBytesPerLine
= r
->header
.cupsBytesPerLine
;
386 while (remaining
> 0 && r
->remaining
> 0)
391 * Need to read a new row...
394 if (remaining
== cupsBytesPerLine
)
400 * Read using a modified PackBits compression...
403 if (!cups_raster_read(r
, &byte
, 1))
412 bytes
= cupsBytesPerLine
;
417 * Get a new repeat count...
420 if (!cups_raster_read(r
, &byte
, 1))
426 * Copy N literal pixels...
429 count
= (257 - byte
) * r
->bpp
;
434 if (!cups_raster_read(r
, temp
, count
))
443 * Repeat the next N bytes...
446 count
= (byte
+ 1) * r
->bpp
;
455 if (!cups_raster_read(r
, temp
, r
->bpp
))
463 memcpy(temp
, temp
- r
->bpp
, r
->bpp
);
471 * Swap bytes as needed...
474 if ((r
->header
.cupsBitsPerColor
== 16 ||
475 r
->header
.cupsBitsPerPixel
== 12 ||
476 r
->header
.cupsBitsPerPixel
== 16) &&
478 cups_swap(ptr
, bytes
);
484 if (remaining
>= cupsBytesPerLine
)
486 bytes
= cupsBytesPerLine
;
487 r
->pcurrent
= r
->pixels
;
494 r
->pcurrent
= r
->pixels
+ bytes
;
498 * Copy data as needed...
502 memcpy(p
, ptr
, bytes
);
507 * Copy fragment from buffer...
510 if ((unsigned)(bytes
= (int)(r
->pend
- r
->pcurrent
)) > remaining
)
513 memcpy(p
, r
->pcurrent
, bytes
);
514 r
->pcurrent
+= bytes
;
516 if (r
->pcurrent
>= r
->pend
)
518 r
->pcurrent
= r
->pixels
;
533 * 'cupsRasterWriteHeader()' - Write a raster page header from a version 1 page
536 * This function is deprecated. Use @link cupsRasterWriteHeader2@ instead.
541 unsigned /* O - 1 on success, 0 on failure */
542 cupsRasterWriteHeader(
543 cups_raster_t
*r
, /* I - Raster stream */
544 cups_page_header_t
*h
) /* I - Raster page header */
546 if (r
== NULL
|| r
->mode
== CUPS_RASTER_READ
)
550 * Make a copy of the header, and compute the number of raster
551 * lines in the page image...
554 memset(&(r
->header
), 0, sizeof(r
->header
));
555 memcpy(&(r
->header
), h
, sizeof(cups_page_header_t
));
557 cups_raster_update(r
);
560 * Write the raster header...
563 if (r
->mode
== CUPS_RASTER_WRITE_PWG
)
566 * PWG raster data is always network byte order with much of the page header
570 cups_page_header2_t fh
; /* File page header */
572 memset(&fh
, 0, sizeof(fh
));
574 strlcpy(fh
.MediaClass
, "PwgRaster", sizeof(fh
.MediaClass
));
576 strlcpy(fh
.MediaColor
, r
->header
.MediaColor
, sizeof(fh
.MediaColor
));
577 strlcpy(fh
.MediaType
, r
->header
.MediaType
, sizeof(fh
.MediaType
));
578 strlcpy(fh
.OutputType
, r
->header
.OutputType
, sizeof(fh
.OutputType
));
579 /* PrintContentType */
581 fh
.CutMedia
= htonl(r
->header
.CutMedia
);
582 fh
.Duplex
= htonl(r
->header
.Duplex
);
583 fh
.HWResolution
[0] = htonl(r
->header
.HWResolution
[0]);
584 fh
.HWResolution
[1] = htonl(r
->header
.HWResolution
[1]);
585 fh
.ImagingBoundingBox
[0] = htonl(r
->header
.ImagingBoundingBox
[0]);
586 fh
.ImagingBoundingBox
[1] = htonl(r
->header
.ImagingBoundingBox
[1]);
587 fh
.ImagingBoundingBox
[2] = htonl(r
->header
.ImagingBoundingBox
[2]);
588 fh
.ImagingBoundingBox
[3] = htonl(r
->header
.ImagingBoundingBox
[3]);
589 fh
.InsertSheet
= htonl(r
->header
.InsertSheet
);
590 fh
.Jog
= htonl(r
->header
.Jog
);
591 fh
.LeadingEdge
= htonl(r
->header
.LeadingEdge
);
592 fh
.ManualFeed
= htonl(r
->header
.ManualFeed
);
593 fh
.MediaPosition
= htonl(r
->header
.MediaPosition
);
594 fh
.MediaWeight
= htonl(r
->header
.MediaWeight
);
595 fh
.NumCopies
= htonl(r
->header
.NumCopies
);
596 fh
.Orientation
= htonl(r
->header
.Orientation
);
597 fh
.PageSize
[0] = htonl(r
->header
.PageSize
[0]);
598 fh
.PageSize
[1] = htonl(r
->header
.PageSize
[1]);
599 fh
.Tumble
= htonl(r
->header
.Tumble
);
600 fh
.cupsWidth
= htonl(r
->header
.cupsWidth
);
601 fh
.cupsHeight
= htonl(r
->header
.cupsHeight
);
602 fh
.cupsBitsPerColor
= htonl(r
->header
.cupsBitsPerColor
);
603 fh
.cupsBitsPerPixel
= htonl(r
->header
.cupsBitsPerPixel
);
604 fh
.cupsBytesPerLine
= htonl(r
->header
.cupsBytesPerLine
);
605 fh
.cupsColorOrder
= htonl(r
->header
.cupsColorOrder
);
606 fh
.cupsColorSpace
= htonl(r
->header
.cupsColorSpace
);
607 fh
.cupsNumColors
= htonl(r
->header
.cupsNumColors
);
608 fh
.cupsInteger
[0] = htonl(r
->header
.cupsInteger
[0]);
610 fh
.cupsInteger
[1] = htonl(r
->header
.cupsInteger
[1]);
611 /* CrossFeedTransform */
612 fh
.cupsInteger
[2] = htonl(r
->header
.cupsInteger
[2]);
614 fh
.cupsInteger
[3] = htonl(r
->header
.cupsInteger
[3]);
616 fh
.cupsInteger
[4] = htonl(r
->header
.cupsInteger
[4]);
618 fh
.cupsInteger
[5] = htonl(r
->header
.cupsInteger
[5]);
620 fh
.cupsInteger
[6] = htonl(r
->header
.cupsInteger
[6]);
622 fh
.cupsInteger
[7] = htonl(r
->header
.cupsInteger
[7]);
624 fh
.cupsInteger
[8] = htonl(r
->header
.cupsInteger
[8]);
626 fh
.cupsInteger
[14] = htonl(r
->header
.cupsInteger
[14]);
627 /* VendorIdentifier */
628 fh
.cupsInteger
[15] = htonl(r
->header
.cupsInteger
[15]);
631 memcpy(fh
.cupsReal
, r
->header
.cupsReal
,
632 sizeof(fh
.cupsReal
) + sizeof(fh
.cupsString
));
635 strlcpy(fh
.cupsRenderingIntent
, r
->header
.cupsRenderingIntent
,
636 sizeof(fh
.cupsRenderingIntent
));
637 strlcpy(fh
.cupsPageSizeName
, r
->header
.cupsPageSizeName
,
638 sizeof(fh
.cupsPageSizeName
));
640 return (cups_raster_io(r
, (unsigned char *)&fh
, sizeof(fh
)) == sizeof(fh
));
643 return (cups_raster_io(r
, (unsigned char *)&(r
->header
), sizeof(r
->header
))
644 == sizeof(r
->header
));
649 * 'cupsRasterWriteHeader2()' - Write a raster page header from a version 2
650 * page header structure.
652 * The page header can be initialized using @link cupsRasterInterpretPPD@.
654 * @since CUPS 1.2/OS X 10.5@
657 unsigned /* O - 1 on success, 0 on failure */
658 cupsRasterWriteHeader2(
659 cups_raster_t
*r
, /* I - Raster stream */
660 cups_page_header2_t
*h
) /* I - Raster page header */
662 if (r
== NULL
|| r
->mode
== CUPS_RASTER_READ
)
666 * Make a copy of the header, and compute the number of raster
667 * lines in the page image...
670 memcpy(&(r
->header
), h
, sizeof(cups_page_header2_t
));
672 cups_raster_update(r
);
675 * Write the raster header...
678 if (r
->mode
== CUPS_RASTER_WRITE_PWG
)
681 * PWG raster data is always network byte order with most of the page header
685 cups_page_header2_t fh
; /* File page header */
687 memset(&fh
, 0, sizeof(fh
));
688 strlcpy(fh
.MediaClass
, "PwgRaster", sizeof(fh
.MediaClass
));
689 strlcpy(fh
.MediaColor
, r
->header
.MediaColor
, sizeof(fh
.MediaColor
));
690 strlcpy(fh
.MediaType
, r
->header
.MediaType
, sizeof(fh
.MediaType
));
691 strlcpy(fh
.OutputType
, r
->header
.OutputType
, sizeof(fh
.OutputType
));
692 strlcpy(fh
.cupsRenderingIntent
, r
->header
.cupsRenderingIntent
,
693 sizeof(fh
.cupsRenderingIntent
));
694 strlcpy(fh
.cupsPageSizeName
, r
->header
.cupsPageSizeName
,
695 sizeof(fh
.cupsPageSizeName
));
697 fh
.CutMedia
= htonl(r
->header
.CutMedia
);
698 fh
.Duplex
= htonl(r
->header
.Duplex
);
699 fh
.HWResolution
[0] = htonl(r
->header
.HWResolution
[0]);
700 fh
.HWResolution
[1] = htonl(r
->header
.HWResolution
[1]);
701 fh
.ImagingBoundingBox
[0] = htonl(r
->header
.ImagingBoundingBox
[0]);
702 fh
.ImagingBoundingBox
[1] = htonl(r
->header
.ImagingBoundingBox
[1]);
703 fh
.ImagingBoundingBox
[2] = htonl(r
->header
.ImagingBoundingBox
[2]);
704 fh
.ImagingBoundingBox
[3] = htonl(r
->header
.ImagingBoundingBox
[3]);
705 fh
.InsertSheet
= htonl(r
->header
.InsertSheet
);
706 fh
.Jog
= htonl(r
->header
.Jog
);
707 fh
.LeadingEdge
= htonl(r
->header
.LeadingEdge
);
708 fh
.ManualFeed
= htonl(r
->header
.ManualFeed
);
709 fh
.MediaPosition
= htonl(r
->header
.MediaPosition
);
710 fh
.MediaWeight
= htonl(r
->header
.MediaWeight
);
711 fh
.NumCopies
= htonl(r
->header
.NumCopies
);
712 fh
.Orientation
= htonl(r
->header
.Orientation
);
713 fh
.PageSize
[0] = htonl(r
->header
.PageSize
[0]);
714 fh
.PageSize
[1] = htonl(r
->header
.PageSize
[1]);
715 fh
.Tumble
= htonl(r
->header
.Tumble
);
716 fh
.cupsWidth
= htonl(r
->header
.cupsWidth
);
717 fh
.cupsHeight
= htonl(r
->header
.cupsHeight
);
718 fh
.cupsBitsPerColor
= htonl(r
->header
.cupsBitsPerColor
);
719 fh
.cupsBitsPerPixel
= htonl(r
->header
.cupsBitsPerPixel
);
720 fh
.cupsBytesPerLine
= htonl(r
->header
.cupsBytesPerLine
);
721 fh
.cupsColorOrder
= htonl(r
->header
.cupsColorOrder
);
722 fh
.cupsColorSpace
= htonl(r
->header
.cupsColorSpace
);
723 fh
.cupsNumColors
= htonl(r
->header
.cupsNumColors
);
724 fh
.cupsInteger
[0] = htonl(r
->header
.cupsInteger
[0]);
725 fh
.cupsInteger
[1] = htonl(r
->header
.cupsInteger
[1]);
726 fh
.cupsInteger
[2] = htonl(r
->header
.cupsInteger
[2]);
727 fh
.cupsInteger
[3] = htonl((unsigned)(r
->header
.cupsImagingBBox
[0] *
728 r
->header
.HWResolution
[0]));
729 fh
.cupsInteger
[4] = htonl((unsigned)(r
->header
.cupsImagingBBox
[1] *
730 r
->header
.HWResolution
[1]));
731 fh
.cupsInteger
[5] = htonl((unsigned)(r
->header
.cupsImagingBBox
[2] *
732 r
->header
.HWResolution
[0]));
733 fh
.cupsInteger
[6] = htonl((unsigned)(r
->header
.cupsImagingBBox
[3] *
734 r
->header
.HWResolution
[1]));
735 fh
.cupsInteger
[7] = htonl(0xffffff);
737 return (cups_raster_io(r
, (unsigned char *)&fh
, sizeof(fh
)) == sizeof(fh
));
740 return (cups_raster_io(r
, (unsigned char *)&(r
->header
), sizeof(r
->header
))
741 == sizeof(r
->header
));
746 * 'cupsRasterWritePixels()' - Write raster pixels.
748 * For best performance, filters should write one or more whole lines.
749 * The "cupsBytesPerLine" value from the page header can be used to allocate
750 * the line buffer and as the number of bytes to write.
753 unsigned /* O - Number of bytes written */
754 cupsRasterWritePixels(cups_raster_t
*r
, /* I - Raster stream */
755 unsigned char *p
, /* I - Bytes to write */
756 unsigned len
)/* I - Number of bytes to write */
758 int bytes
; /* Bytes read */
759 unsigned remaining
; /* Bytes remaining */
762 DEBUG_printf(("cupsRasterWritePixels(r=%p, p=%p, len=%u), remaining=%u\n",
763 r
, p
, len
, r
->remaining
));
765 if (r
== NULL
|| r
->mode
== CUPS_RASTER_READ
|| r
->remaining
== 0)
771 * Without compression, just write the raster data raw unless the data needs
775 r
->remaining
-= len
/ r
->header
.cupsBytesPerLine
;
778 (r
->header
.cupsBitsPerColor
== 16 ||
779 r
->header
.cupsBitsPerPixel
== 12 ||
780 r
->header
.cupsBitsPerPixel
== 16))
782 unsigned char *bufptr
; /* Pointer into write buffer */
783 unsigned count
; /* Remaining count */
786 * Allocate a write buffer as needed...
789 if ((size_t)len
> r
->bufsize
)
792 bufptr
= realloc(r
->buffer
, len
);
794 bufptr
= malloc(len
);
804 * Byte swap the pixels...
807 for (bufptr
= r
->buffer
, count
= len
; count
> 1; count
-= 2, bufptr
+= 2)
813 if (count
) /* This should never happen... */
817 * Write the byte-swapped buffer...
820 return (cups_raster_io(r
, r
->buffer
, len
));
823 return (cups_raster_io(r
, p
, len
));
827 * Otherwise, compress each line...
830 for (remaining
= len
; remaining
> 0; remaining
-= bytes
, p
+= bytes
)
833 * Figure out the number of remaining bytes on the current line...
836 if ((bytes
= remaining
) > (int)(r
->pend
- r
->pcurrent
))
837 bytes
= (int)(r
->pend
- r
->pcurrent
);
842 * Check to see if this line is the same as the previous line...
845 if (memcmp(p
, r
->pcurrent
, bytes
))
847 if (!cups_raster_write(r
, r
->pixels
))
855 * Mark more bytes as the same...
858 r
->pcurrent
+= bytes
;
860 if (r
->pcurrent
>= r
->pend
)
863 * Increase the repeat count...
867 r
->pcurrent
= r
->pixels
;
870 * Flush out this line if it is the last one...
875 if (r
->remaining
== 0)
876 return (cups_raster_write(r
, r
->pixels
));
877 else if (r
->count
== 256)
879 if (cups_raster_write(r
, r
->pixels
) == 0)
893 * Copy the raster data to the buffer...
896 memcpy(r
->pcurrent
, p
, bytes
);
898 r
->pcurrent
+= bytes
;
900 if (r
->pcurrent
>= r
->pend
)
903 * Increase the repeat count...
907 r
->pcurrent
= r
->pixels
;
910 * Flush out this line if it is the last one...
915 if (r
->remaining
== 0)
916 return (cups_raster_write(r
, r
->pixels
));
926 * 'cups_raster_read_header()' - Read a raster page header.
929 static unsigned /* O - 1 on success, 0 on fail */
930 cups_raster_read_header(
931 cups_raster_t
*r
) /* I - Raster stream */
933 int len
; /* Length for read/swap */
936 if (r
== NULL
|| r
->mode
!= CUPS_RASTER_READ
)
940 * Get the length of the raster header...
943 if (r
->sync
== CUPS_RASTER_SYNCv1
|| r
->sync
== CUPS_RASTER_REVSYNCv1
)
944 len
= sizeof(cups_page_header_t
);
946 len
= sizeof(cups_page_header2_t
);
952 memset(&(r
->header
), 0, sizeof(r
->header
));
954 if (cups_raster_read(r
, (unsigned char *)&(r
->header
), len
) < len
)
958 * Swap bytes as needed...
963 unsigned *s
, /* Current word */
964 temp
; /* Temporary copy */
967 DEBUG_puts("Swapping header bytes...");
969 for (len
= 81, s
= &(r
->header
.AdvanceDistance
);
973 DEBUG_printf(("%08x =>", *s
));
976 *s
= ((temp
& 0xff) << 24) |
977 ((temp
& 0xff00) << 8) |
978 ((temp
& 0xff0000) >> 8) |
979 ((temp
& 0xff000000) >> 24);
981 DEBUG_printf((" %08x\n", *s
));
986 * Update the header and row count...
989 cups_raster_update(r
);
991 return (r
->header
.cupsBytesPerLine
!= 0 && r
->header
.cupsHeight
!= 0);
996 * 'cups_raster_io()' - Read/write bytes from a context, handling interruptions.
999 static int /* O - Bytes read or -1 */
1000 cups_raster_io(cups_raster_t
*r
, /* I - Raster stream */
1001 unsigned char *buf
, /* I - Buffer for read/write */
1002 int bytes
) /* I - Number of bytes to read/write */
1004 ssize_t count
; /* Number of bytes read/written */
1005 size_t total
; /* Total bytes read/written */
1008 DEBUG_printf(("4cups_raster_io(r=%p, buf=%p, bytes=%d)", r
, buf
, bytes
));
1010 for (total
= 0; total
< (size_t)bytes
; total
+= count
, buf
+= count
)
1012 count
= (*r
->iocb
)(r
->ctx
, buf
, bytes
- total
);
1014 DEBUG_printf(("5cups_raster_io: count=%d, total=%d", (int)count
,
1022 return ((int)total
);
1027 * 'cups_raster_read()' - Read through the raster buffer.
1030 static int /* O - Number of bytes read */
1031 cups_raster_read(cups_raster_t
*r
, /* I - Raster stream */
1032 unsigned char *buf
, /* I - Buffer */
1033 int bytes
) /* I - Number of bytes to read */
1035 int count
, /* Number of bytes read */
1036 remaining
, /* Remaining bytes in buffer */
1037 total
; /* Total bytes read */
1040 DEBUG_printf(("cups_raster_read(r=%p, buf=%p, bytes=%d)\n", r
, buf
, bytes
));
1043 return (cups_raster_io(r
, buf
, bytes
));
1046 * Allocate a read buffer as needed...
1049 count
= 2 * r
->header
.cupsBytesPerLine
;
1051 if ((size_t)count
> r
->bufsize
)
1053 int offset
= (int)(r
->bufptr
- r
->buffer
);
1054 /* Offset to current start of buffer */
1055 int end
= (int)(r
->bufend
- r
->buffer
);
1056 /* Offset to current end of buffer */
1057 unsigned char *rptr
; /* Pointer in read buffer */
1060 rptr
= realloc(r
->buffer
, count
);
1062 rptr
= malloc(count
);
1068 r
->bufptr
= rptr
+ offset
;
1069 r
->bufend
= rptr
+ end
;
1074 * Loop until we have read everything...
1077 for (total
= 0, remaining
= (int)(r
->bufend
- r
->bufptr
);
1079 total
+= count
, buf
+= count
)
1081 count
= bytes
- total
;
1083 DEBUG_printf(("count=%d, remaining=%d, buf=%p, bufptr=%p, bufend=%p...\n",
1084 count
, remaining
, buf
, r
->bufptr
, r
->bufend
));
1091 * Read into the raster buffer and then copy...
1094 remaining
= (*r
->iocb
)(r
->ctx
, r
->buffer
, r
->bufsize
);
1098 r
->bufptr
= r
->buffer
;
1099 r
->bufend
= r
->buffer
+ remaining
;
1104 * Read directly into "buf"...
1107 count
= (*r
->iocb
)(r
->ctx
, buf
, count
);
1117 * Copy bytes from raster buffer to "buf"...
1120 if (count
> remaining
)
1129 *buf
= *(r
->bufptr
)++;
1132 else if (count
< 128)
1135 * Copy up to 127 bytes without using memcpy(); this is
1136 * faster because it avoids an extra function call and is
1137 * often further optimized by the compiler...
1140 unsigned char *bufptr
; /* Temporary buffer pointer */
1144 for (bufptr
= r
->bufptr
; count
> 0; count
--, total
++)
1152 * Use memcpy() for a large read...
1155 memcpy(buf
, r
->bufptr
, count
);
1166 * 'cups_raster_update()' - Update the raster header and row count for the
1171 cups_raster_update(cups_raster_t
*r
) /* I - Raster stream */
1173 if (r
->sync
== CUPS_RASTER_SYNCv1
|| r
->sync
== CUPS_RASTER_REVSYNCv1
||
1174 r
->header
.cupsNumColors
== 0)
1177 * Set the "cupsNumColors" field according to the colorspace...
1180 switch (r
->header
.cupsColorSpace
)
1182 case CUPS_CSPACE_W
:
1183 case CUPS_CSPACE_K
:
1184 case CUPS_CSPACE_WHITE
:
1185 case CUPS_CSPACE_GOLD
:
1186 case CUPS_CSPACE_SILVER
:
1187 case CUPS_CSPACE_SW
:
1188 r
->header
.cupsNumColors
= 1;
1191 case CUPS_CSPACE_RGB
:
1192 case CUPS_CSPACE_CMY
:
1193 case CUPS_CSPACE_YMC
:
1194 case CUPS_CSPACE_CIEXYZ
:
1195 case CUPS_CSPACE_CIELab
:
1196 case CUPS_CSPACE_SRGB
:
1197 case CUPS_CSPACE_ADOBERGB
:
1198 case CUPS_CSPACE_ICC1
:
1199 case CUPS_CSPACE_ICC2
:
1200 case CUPS_CSPACE_ICC3
:
1201 case CUPS_CSPACE_ICC4
:
1202 case CUPS_CSPACE_ICC5
:
1203 case CUPS_CSPACE_ICC6
:
1204 case CUPS_CSPACE_ICC7
:
1205 case CUPS_CSPACE_ICC8
:
1206 case CUPS_CSPACE_ICC9
:
1207 case CUPS_CSPACE_ICCA
:
1208 case CUPS_CSPACE_ICCB
:
1209 case CUPS_CSPACE_ICCC
:
1210 case CUPS_CSPACE_ICCD
:
1211 case CUPS_CSPACE_ICCE
:
1212 case CUPS_CSPACE_ICCF
:
1213 r
->header
.cupsNumColors
= 3;
1216 case CUPS_CSPACE_RGBA
:
1217 case CUPS_CSPACE_RGBW
:
1218 case CUPS_CSPACE_CMYK
:
1219 case CUPS_CSPACE_YMCK
:
1220 case CUPS_CSPACE_KCMY
:
1221 case CUPS_CSPACE_GMCK
:
1222 case CUPS_CSPACE_GMCS
:
1223 r
->header
.cupsNumColors
= 4;
1226 case CUPS_CSPACE_KCMYcm
:
1227 if (r
->header
.cupsBitsPerPixel
< 8)
1228 r
->header
.cupsNumColors
= 6;
1230 r
->header
.cupsNumColors
= 4;
1233 case CUPS_CSPACE_DEVICE1
:
1234 case CUPS_CSPACE_DEVICE2
:
1235 case CUPS_CSPACE_DEVICE3
:
1236 case CUPS_CSPACE_DEVICE4
:
1237 case CUPS_CSPACE_DEVICE5
:
1238 case CUPS_CSPACE_DEVICE6
:
1239 case CUPS_CSPACE_DEVICE7
:
1240 case CUPS_CSPACE_DEVICE8
:
1241 case CUPS_CSPACE_DEVICE9
:
1242 case CUPS_CSPACE_DEVICEA
:
1243 case CUPS_CSPACE_DEVICEB
:
1244 case CUPS_CSPACE_DEVICEC
:
1245 case CUPS_CSPACE_DEVICED
:
1246 case CUPS_CSPACE_DEVICEE
:
1247 case CUPS_CSPACE_DEVICEF
:
1248 r
->header
.cupsNumColors
= r
->header
.cupsColorSpace
-
1249 CUPS_CSPACE_DEVICE1
+ 1;
1255 * Set the number of bytes per pixel/color...
1258 if (r
->header
.cupsColorOrder
== CUPS_ORDER_CHUNKED
)
1259 r
->bpp
= (r
->header
.cupsBitsPerPixel
+ 7) / 8;
1261 r
->bpp
= (r
->header
.cupsBitsPerColor
+ 7) / 8;
1264 * Set the number of remaining rows...
1267 if (r
->header
.cupsColorOrder
== CUPS_ORDER_PLANAR
)
1268 r
->remaining
= r
->header
.cupsHeight
* r
->header
.cupsNumColors
;
1270 r
->remaining
= r
->header
.cupsHeight
;
1273 * Allocate the compression buffer...
1278 if (r
->pixels
!= NULL
)
1281 r
->pixels
= calloc(r
->header
.cupsBytesPerLine
, 1);
1282 r
->pcurrent
= r
->pixels
;
1283 r
->pend
= r
->pixels
+ r
->header
.cupsBytesPerLine
;
1290 * 'cups_raster_write()' - Write a row of compressed raster data...
1293 static int /* O - Number of bytes written */
1295 cups_raster_t
*r
, /* I - Raster stream */
1296 const unsigned char *pixels
) /* I - Pixel data to write */
1298 const unsigned char *start
, /* Start of sequence */
1299 *ptr
, /* Current pointer in sequence */
1300 *pend
, /* End of raster buffer */
1301 *plast
; /* Pointer to last pixel */
1302 unsigned char *wptr
; /* Pointer into write buffer */
1303 int bpp
, /* Bytes per pixel */
1307 DEBUG_printf(("cups_raster_write(r=%p, pixels=%p)\n", r
, pixels
));
1310 * Allocate a write buffer as needed...
1313 count
= r
->header
.cupsBytesPerLine
* 2;
1314 if ((size_t)count
> r
->bufsize
)
1317 wptr
= realloc(r
->buffer
, count
);
1319 wptr
= malloc(count
);
1329 * Write the row repeat count...
1333 pend
= pixels
+ r
->header
.cupsBytesPerLine
;
1336 *wptr
++ = r
->count
- 1;
1339 * Write using a modified PackBits compression...
1342 for (ptr
= pixels
; ptr
< pend
;)
1350 * Encode a single pixel at the end...
1354 for (count
= bpp
; count
> 0; count
--)
1357 else if (!memcmp(start
, ptr
, bpp
))
1360 * Encode a sequence of repeating pixels...
1363 for (count
= 2; count
< 128 && ptr
< plast
; count
++, ptr
+= bpp
)
1364 if (memcmp(ptr
, ptr
+ bpp
, bpp
))
1367 *wptr
++ = count
- 1;
1368 for (count
= bpp
; count
> 0; count
--)
1374 * Encode a sequence of non-repeating pixels...
1377 for (count
= 1; count
< 128 && ptr
< plast
; count
++, ptr
+= bpp
)
1378 if (!memcmp(ptr
, ptr
+ bpp
, bpp
))
1381 if (ptr
>= plast
&& count
< 128)
1387 *wptr
++ = 257 - count
;
1390 memcpy(wptr
, start
, count
);
1395 return (cups_raster_io(r
, r
->buffer
, (int)(wptr
- r
->buffer
)));
1400 * 'cups_read_fd()' - Read bytes from a file.
1403 static ssize_t
/* O - Bytes read or -1 */
1404 cups_read_fd(void *ctx
, /* I - File descriptor as pointer */
1405 unsigned char *buf
, /* I - Buffer for read */
1406 size_t bytes
) /* I - Maximum number of bytes to read */
1408 int fd
= (int)((intptr_t)ctx
);
1409 /* File descriptor */
1410 ssize_t count
; /* Number of bytes read */
1413 #ifdef WIN32 /* Sigh */
1414 while ((count
= read(fd
, buf
, (unsigned)bytes
)) < 0)
1416 while ((count
= read(fd
, buf
, bytes
)) < 0)
1418 if (errno
!= EINTR
&& errno
!= EAGAIN
)
1426 * 'cups_swap()' - Swap bytes in raster data...
1430 cups_swap(unsigned char *buf
, /* I - Buffer to swap */
1431 int bytes
) /* I - Number of bytes to swap */
1433 unsigned char even
, odd
; /* Temporary variables */
1452 * 'cups_write_fd()' - Write bytes to a file.
1455 static ssize_t
/* O - Bytes written or -1 */
1456 cups_write_fd(void *ctx
, /* I - File descriptor pointer */
1457 unsigned char *buf
, /* I - Bytes to write */
1458 size_t bytes
) /* I - Number of bytes to write */
1460 int fd
= (int)((intptr_t)ctx
);
1461 /* File descriptor */
1462 ssize_t count
; /* Number of bytes written */
1465 #ifdef WIN32 /* Sigh */
1466 while ((count
= write(fd
, buf
, (unsigned)bytes
)) < 0)
1468 while ((count
= write(fd
, buf
, bytes
)) < 0)
1470 if (errno
!= EINTR
&& errno
!= EAGAIN
)