4 * Raster file routines for CUPS.
6 * Copyright 2007-2015 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 * Include necessary headers...
24 #include <cups/raster-private.h>
27 #endif /* HAVE_STDINT_H */
31 * Private structures...
34 struct _cups_raster_s
/**** Raster stream data ****/
36 unsigned sync
; /* Sync word from start of stream */
37 void *ctx
; /* File descriptor */
38 cups_raster_iocb_t iocb
; /* IO callback */
39 cups_mode_t mode
; /* Read/write mode */
40 cups_page_header2_t header
; /* Raster header for current page */
41 unsigned count
, /* Current row run-length count */
42 remaining
, /* Remaining rows in page image */
43 bpp
; /* Bytes per pixel/color */
44 unsigned char *pixels
, /* Pixels for current row */
45 *pend
, /* End of pixel buffer */
46 *pcurrent
; /* Current byte in pixel buffer */
47 int compressed
, /* Non-zero if data is compressed */
48 swapped
; /* Non-zero if data is byte-swapped */
49 unsigned char *buffer
, /* Read/write buffer */
50 *bufptr
, /* Current (read) position in buffer */
51 *bufend
; /* End of current (read) buffer */
52 size_t bufsize
; /* Buffer size */
54 size_t iocount
; /* Number of bytes read/written */
63 static ssize_t
cups_raster_io(cups_raster_t
*r
, unsigned char *buf
, size_t bytes
);
64 static unsigned cups_raster_read_header(cups_raster_t
*r
);
65 static ssize_t
cups_raster_read(cups_raster_t
*r
, unsigned char *buf
,
67 static int cups_raster_update(cups_raster_t
*r
);
68 static ssize_t
cups_raster_write(cups_raster_t
*r
,
69 const unsigned char *pixels
);
70 static ssize_t
cups_read_fd(void *ctx
, unsigned char *buf
, size_t bytes
);
71 static void cups_swap(unsigned char *buf
, size_t bytes
);
72 static ssize_t
cups_write_fd(void *ctx
, unsigned char *buf
, size_t bytes
);
76 * 'cupsRasterClose()' - Close a raster stream.
78 * The file descriptor associated with the raster stream must be closed
79 * separately as needed.
83 cupsRasterClose(cups_raster_t
*r
) /* I - Stream to close */
99 * 'cupsRasterInitPWGHeader()' - Initialize a page header for PWG Raster output.
101 * The "media" argument specifies the media to use.
103 * The "type" argument specifies a "pwg-raster-document-type-supported" value
104 * that controls the color space and bit depth of the raster data.
106 * The "xres" and "yres" arguments specify the raster resolution in dots per
109 * The "sheet_back" argument specifies a "pwg-raster-document-sheet-back" value
110 * to apply for the back side of a page. Pass @code NULL@ for the front side.
115 int /* O - 1 on success, 0 on failure */
116 cupsRasterInitPWGHeader(
117 cups_page_header2_t
*h
, /* I - Page header */
118 pwg_media_t
*media
, /* I - PWG media information */
119 const char *type
, /* I - PWG raster type string */
120 int xdpi
, /* I - Cross-feed direction (horizontal) resolution */
121 int ydpi
, /* I - Feed direction (vertical) resolution */
122 const char *sides
, /* I - IPP "sides" option value */
123 const char *sheet_back
) /* I - Transform for back side or @code NULL@ for none */
125 if (!h
|| !media
|| !type
|| xdpi
<= 0 || ydpi
<= 0)
127 _cupsRasterAddError("%s", strerror(EINVAL
));
132 * Initialize the page header...
135 memset(h
, 0, sizeof(cups_page_header2_t
));
137 strlcpy(h
->cupsPageSizeName
, media
->pwg
, sizeof(h
->cupsPageSizeName
));
139 h
->PageSize
[0] = (unsigned)(72 * media
->width
/ 2540);
140 h
->PageSize
[1] = (unsigned)(72 * media
->length
/ 2540);
142 /* This never gets written but is needed for some applications */
143 h
->cupsPageSize
[0] = 72.0f
* media
->width
/ 2540.0f
;
144 h
->cupsPageSize
[1] = 72.0f
* media
->length
/ 2540.0f
;
146 h
->ImagingBoundingBox
[2] = h
->PageSize
[0];
147 h
->ImagingBoundingBox
[3] = h
->PageSize
[1];
149 h
->HWResolution
[0] = (unsigned)xdpi
;
150 h
->HWResolution
[1] = (unsigned)ydpi
;
152 h
->cupsWidth
= (unsigned)(media
->width
* xdpi
/ 2540);
153 h
->cupsHeight
= (unsigned)(media
->length
* ydpi
/ 2540);
155 if (h
->cupsWidth
> 0x00ffffff || h
->cupsHeight
> 0x00ffffff)
157 _cupsRasterAddError("Raster dimensions too large.");
161 h
->cupsInteger
[CUPS_RASTER_PWG_ImageBoxRight
] = h
->cupsWidth
;
162 h
->cupsInteger
[CUPS_RASTER_PWG_ImageBoxBottom
] = h
->cupsHeight
;
165 * Colorspace and bytes per line...
168 if (!strcmp(type
, "adobe-rgb_8"))
170 h
->cupsBitsPerColor
= 8;
171 h
->cupsBitsPerPixel
= 24;
172 h
->cupsColorSpace
= CUPS_CSPACE_ADOBERGB
;
174 else if (!strcmp(type
, "adobe-rgb_16"))
176 h
->cupsBitsPerColor
= 16;
177 h
->cupsBitsPerPixel
= 48;
178 h
->cupsColorSpace
= CUPS_CSPACE_ADOBERGB
;
180 else if (!strcmp(type
, "black_1"))
182 h
->cupsBitsPerColor
= 1;
183 h
->cupsBitsPerPixel
= 1;
184 h
->cupsColorSpace
= CUPS_CSPACE_K
;
186 else if (!strcmp(type
, "black_8"))
188 h
->cupsBitsPerColor
= 8;
189 h
->cupsBitsPerPixel
= 8;
190 h
->cupsColorSpace
= CUPS_CSPACE_K
;
192 else if (!strcmp(type
, "black_16"))
194 h
->cupsBitsPerColor
= 16;
195 h
->cupsBitsPerPixel
= 16;
196 h
->cupsColorSpace
= CUPS_CSPACE_K
;
198 else if (!strcmp(type
, "cmyk_8"))
200 h
->cupsBitsPerColor
= 8;
201 h
->cupsBitsPerPixel
= 32;
202 h
->cupsColorSpace
= CUPS_CSPACE_CMYK
;
204 else if (!strcmp(type
, "cmyk_16"))
206 h
->cupsBitsPerColor
= 16;
207 h
->cupsBitsPerPixel
= 64;
208 h
->cupsColorSpace
= CUPS_CSPACE_CMYK
;
210 else if (!strncmp(type
, "device", 6) && type
[6] >= '1' && type
[6] <= '9')
212 int ncolors
, bits
; /* Number of colors and bits */
215 if (sscanf(type
, "device%d_%d", &ncolors
, &bits
) != 2 || ncolors
> 15 || (bits
!= 8 && bits
!= 16))
217 _cupsRasterAddError("Unsupported raster type \'%s\'.", type
);
221 h
->cupsBitsPerColor
= (unsigned)bits
;
222 h
->cupsBitsPerPixel
= (unsigned)(ncolors
* bits
);
223 h
->cupsColorSpace
= (cups_cspace_t
)(CUPS_CSPACE_DEVICE1
+ ncolors
- 1);
225 else if (!strcmp(type
, "rgb_8"))
227 h
->cupsBitsPerColor
= 8;
228 h
->cupsBitsPerPixel
= 24;
229 h
->cupsColorSpace
= CUPS_CSPACE_RGB
;
231 else if (!strcmp(type
, "rgb_16"))
233 h
->cupsBitsPerColor
= 16;
234 h
->cupsBitsPerPixel
= 48;
235 h
->cupsColorSpace
= CUPS_CSPACE_RGB
;
237 else if (!strcmp(type
, "sgray_1"))
239 h
->cupsBitsPerColor
= 1;
240 h
->cupsBitsPerPixel
= 1;
241 h
->cupsColorSpace
= CUPS_CSPACE_SW
;
243 else if (!strcmp(type
, "sgray_8"))
245 h
->cupsBitsPerColor
= 8;
246 h
->cupsBitsPerPixel
= 8;
247 h
->cupsColorSpace
= CUPS_CSPACE_SW
;
249 else if (!strcmp(type
, "sgray_16"))
251 h
->cupsBitsPerColor
= 16;
252 h
->cupsBitsPerPixel
= 16;
253 h
->cupsColorSpace
= CUPS_CSPACE_SW
;
255 else if (!strcmp(type
, "srgb_8"))
257 h
->cupsBitsPerColor
= 8;
258 h
->cupsBitsPerPixel
= 24;
259 h
->cupsColorSpace
= CUPS_CSPACE_SRGB
;
261 else if (!strcmp(type
, "srgb_16"))
263 h
->cupsBitsPerColor
= 16;
264 h
->cupsBitsPerPixel
= 48;
265 h
->cupsColorSpace
= CUPS_CSPACE_SRGB
;
269 _cupsRasterAddError("Unsupported raster type \'%s\'.", type
);
273 h
->cupsColorOrder
= CUPS_ORDER_CHUNKED
;
274 h
->cupsNumColors
= h
->cupsBitsPerPixel
/ h
->cupsBitsPerColor
;
275 h
->cupsBytesPerLine
= (h
->cupsWidth
* h
->cupsBitsPerPixel
+ 7) / 8;
281 h
->cupsInteger
[CUPS_RASTER_PWG_CrossFeedTransform
] = 1;
282 h
->cupsInteger
[CUPS_RASTER_PWG_FeedTransform
] = 1;
286 if (!strcmp(sides
, "two-sided-long-edge"))
290 else if (!strcmp(sides
, "two-sided-short-edge"))
295 else if (strcmp(sides
, "one-sided"))
297 _cupsRasterAddError("Unsupported sides value \'%s\'.", sides
);
303 if (!strcmp(sheet_back
, "flipped"))
306 h
->cupsInteger
[CUPS_RASTER_PWG_CrossFeedTransform
] = 0xffffffffU
;
308 h
->cupsInteger
[CUPS_RASTER_PWG_FeedTransform
] = 0xffffffffU
;
310 else if (!strcmp(sheet_back
, "manual-tumble"))
314 h
->cupsInteger
[CUPS_RASTER_PWG_CrossFeedTransform
] = 0xffffffffU
;
315 h
->cupsInteger
[CUPS_RASTER_PWG_FeedTransform
] = 0xffffffffU
;
318 else if (!strcmp(sheet_back
, "rotated"))
322 h
->cupsInteger
[CUPS_RASTER_PWG_CrossFeedTransform
] = 0xffffffffU
;
323 h
->cupsInteger
[CUPS_RASTER_PWG_FeedTransform
] = 0xffffffffU
;
326 else if (strcmp(sheet_back
, "normal"))
328 _cupsRasterAddError("Unsupported sheet_back value \'%s\'.", sheet_back
);
339 * 'cupsRasterOpen()' - Open a raster stream using a file descriptor.
341 * This function associates a raster stream with the given file descriptor.
342 * For most printer driver filters, "fd" will be 0 (stdin). For most raster
343 * image processor (RIP) filters that generate raster data, "fd" will be 1
346 * When writing raster data, the @code CUPS_RASTER_WRITE@,
347 * @code CUPS_RASTER_WRITE_COMPRESS@, or @code CUPS_RASTER_WRITE_PWG@ mode can
348 * be used - compressed and PWG output is generally 25-50% smaller but adds a
349 * 100-300% execution time overhead.
352 cups_raster_t
* /* O - New stream */
353 cupsRasterOpen(int fd
, /* I - File descriptor */
354 cups_mode_t mode
) /* I - Mode - @code CUPS_RASTER_READ@,
355 @code CUPS_RASTER_WRITE@,
356 @code CUPS_RASTER_WRITE_COMPRESSED@,
357 or @code CUPS_RASTER_WRITE_PWG@ */
359 if (mode
== CUPS_RASTER_READ
)
360 return (cupsRasterOpenIO(cups_read_fd
, (void *)((intptr_t)fd
), mode
));
362 return (cupsRasterOpenIO(cups_write_fd
, (void *)((intptr_t)fd
), mode
));
367 * 'cupsRasterOpenIO()' - Open a raster stream using a callback function.
369 * This function associates a raster stream with the given callback function and
372 * When writing raster data, the @code CUPS_RASTER_WRITE@,
373 * @code CUPS_RASTER_WRITE_COMPRESS@, or @code CUPS_RASTER_WRITE_PWG@ mode can
374 * be used - compressed and PWG output is generally 25-50% smaller but adds a
375 * 100-300% execution time overhead.
378 cups_raster_t
* /* O - New stream */
380 cups_raster_iocb_t iocb
, /* I - Read/write callback */
381 void *ctx
, /* I - Context pointer for callback */
382 cups_mode_t mode
) /* I - Mode - @code CUPS_RASTER_READ@,
383 @code CUPS_RASTER_WRITE@,
384 @code CUPS_RASTER_WRITE_COMPRESSED@,
385 or @code CUPS_RASTER_WRITE_PWG@ */
387 cups_raster_t
*r
; /* New stream */
390 _cupsRasterClearError();
392 if ((r
= calloc(sizeof(cups_raster_t
), 1)) == NULL
)
394 _cupsRasterAddError("Unable to allocate memory for raster stream: %s\n",
403 if (mode
== CUPS_RASTER_READ
)
406 * Open for read - get sync word...
409 if (cups_raster_io(r
, (unsigned char *)&(r
->sync
), sizeof(r
->sync
)) !=
412 _cupsRasterAddError("Unable to read header from raster stream: %s\n",
418 if (r
->sync
!= CUPS_RASTER_SYNC
&&
419 r
->sync
!= CUPS_RASTER_REVSYNC
&&
420 r
->sync
!= CUPS_RASTER_SYNCv1
&&
421 r
->sync
!= CUPS_RASTER_REVSYNCv1
&&
422 r
->sync
!= CUPS_RASTER_SYNCv2
&&
423 r
->sync
!= CUPS_RASTER_REVSYNCv2
)
425 _cupsRasterAddError("Unknown raster format %08x!\n", r
->sync
);
430 if (r
->sync
== CUPS_RASTER_SYNCv2
||
431 r
->sync
== CUPS_RASTER_REVSYNCv2
)
434 if (r
->sync
== CUPS_RASTER_REVSYNC
||
435 r
->sync
== CUPS_RASTER_REVSYNCv1
||
436 r
->sync
== CUPS_RASTER_REVSYNCv2
)
439 DEBUG_printf(("1cupsRasterOpenIO: r->swapped=%d, r->sync=%08x\n", r
->swapped
, r
->sync
));
444 * Open for write - put sync word...
450 case CUPS_RASTER_WRITE
:
451 r
->sync
= CUPS_RASTER_SYNC
;
454 case CUPS_RASTER_WRITE_COMPRESSED
:
456 r
->sync
= CUPS_RASTER_SYNCv2
;
459 case CUPS_RASTER_WRITE_PWG
:
461 r
->sync
= htonl(CUPS_RASTER_SYNC_PWG
);
462 r
->swapped
= r
->sync
!= CUPS_RASTER_SYNC_PWG
;
466 if (cups_raster_io(r
, (unsigned char *)&(r
->sync
), sizeof(r
->sync
)) < (ssize_t
)sizeof(r
->sync
))
468 _cupsRasterAddError("Unable to write raster stream header: %s\n",
480 * 'cupsRasterReadHeader()' - Read a raster page header and store it in a
481 * version 1 page header structure.
483 * This function is deprecated. Use @link cupsRasterReadHeader2@ instead.
485 * Version 1 page headers were used in CUPS 1.0 and 1.1 and contain a subset
486 * of the version 2 page header data. This function handles reading version 2
487 * page headers and copying only the version 1 data into the provided buffer.
492 unsigned /* O - 1 on success, 0 on failure/end-of-file */
493 cupsRasterReadHeader(
494 cups_raster_t
*r
, /* I - Raster stream */
495 cups_page_header_t
*h
) /* I - Pointer to header data */
498 * Get the raster header...
501 if (!cups_raster_read_header(r
))
503 memset(h
, 0, sizeof(cups_page_header_t
));
508 * Copy the header to the user-supplied buffer...
511 memcpy(h
, &(r
->header
), sizeof(cups_page_header_t
));
518 * 'cupsRasterReadHeader2()' - Read a raster page header and store it in a
519 * version 2 page header structure.
521 * @since CUPS 1.2/OS X 10.5@
524 unsigned /* O - 1 on success, 0 on failure/end-of-file */
525 cupsRasterReadHeader2(
526 cups_raster_t
*r
, /* I - Raster stream */
527 cups_page_header2_t
*h
) /* I - Pointer to header data */
530 * Get the raster header...
533 DEBUG_printf(("cupsRasterReadHeader2(r=%p, h=%p)", r
, h
));
535 if (!cups_raster_read_header(r
))
537 memset(h
, 0, sizeof(cups_page_header2_t
));
542 * Copy the header to the user-supplied buffer...
545 memcpy(h
, &(r
->header
), sizeof(cups_page_header2_t
));
552 * 'cupsRasterReadPixels()' - Read raster pixels.
554 * For best performance, filters should read one or more whole lines.
555 * The "cupsBytesPerLine" value from the page header can be used to allocate
556 * the line buffer and as the number of bytes to read.
559 unsigned /* O - Number of bytes read */
560 cupsRasterReadPixels(cups_raster_t
*r
, /* I - Raster stream */
561 unsigned char *p
, /* I - Pointer to pixel buffer */
562 unsigned len
) /* I - Number of bytes to read */
564 ssize_t bytes
; /* Bytes read */
565 unsigned cupsBytesPerLine
; /* cupsBytesPerLine value */
566 unsigned remaining
; /* Bytes remaining */
567 unsigned char *ptr
, /* Pointer to read buffer */
568 byte
, /* Byte from file */
569 *temp
; /* Pointer into buffer */
570 unsigned count
; /* Repetition count */
573 DEBUG_printf(("cupsRasterReadPixels(r=%p, p=%p, len=%u)", r
, p
, len
));
575 if (r
== NULL
|| r
->mode
!= CUPS_RASTER_READ
|| r
->remaining
== 0 ||
576 r
->header
.cupsBytesPerLine
== 0)
578 DEBUG_puts("1cupsRasterReadPixels: Returning 0.");
582 DEBUG_printf(("1cupsRasterReadPixels: compressed=%d, remaining=%u", r
->compressed
, r
->remaining
));
587 * Read without compression...
590 r
->remaining
-= len
/ r
->header
.cupsBytesPerLine
;
592 if (cups_raster_io(r
, p
, len
) < (ssize_t
)len
)
594 DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
599 * Swap bytes as needed...
603 (r
->header
.cupsBitsPerColor
== 16 ||
604 r
->header
.cupsBitsPerPixel
== 12 ||
605 r
->header
.cupsBitsPerPixel
== 16))
612 DEBUG_printf(("1cupsRasterReadPixels: Returning %u", len
));
618 * Read compressed data...
622 cupsBytesPerLine
= r
->header
.cupsBytesPerLine
;
624 while (remaining
> 0 && r
->remaining
> 0)
629 * Need to read a new row...
632 if (remaining
== cupsBytesPerLine
)
638 * Read using a modified PackBits compression...
641 if (!cups_raster_read(r
, &byte
, 1))
643 DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
647 r
->count
= (unsigned)byte
+ 1;
653 bytes
= (ssize_t
)cupsBytesPerLine
;
658 * Get a new repeat count...
661 if (!cups_raster_read(r
, &byte
, 1))
663 DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
670 * Copy N literal pixels...
673 count
= (unsigned)(257 - byte
) * r
->bpp
;
675 if (count
> (unsigned)bytes
)
676 count
= (unsigned)bytes
;
678 if (!cups_raster_read(r
, temp
, count
))
680 DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
690 * Repeat the next N bytes...
693 count
= ((unsigned)byte
+ 1) * r
->bpp
;
694 if (count
> (unsigned)bytes
)
695 count
= (unsigned)bytes
;
702 if (!cups_raster_read(r
, temp
, r
->bpp
))
704 DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
713 memcpy(temp
, temp
- r
->bpp
, r
->bpp
);
721 * Swap bytes as needed...
724 if ((r
->header
.cupsBitsPerColor
== 16 ||
725 r
->header
.cupsBitsPerPixel
== 12 ||
726 r
->header
.cupsBitsPerPixel
== 16) &&
728 cups_swap(ptr
, (size_t)bytes
);
734 if (remaining
>= cupsBytesPerLine
)
736 bytes
= (ssize_t
)cupsBytesPerLine
;
737 r
->pcurrent
= r
->pixels
;
743 bytes
= (ssize_t
)remaining
;
744 r
->pcurrent
= r
->pixels
+ bytes
;
748 * Copy data as needed...
752 memcpy(p
, ptr
, (size_t)bytes
);
757 * Copy fragment from buffer...
760 if ((unsigned)(bytes
= (int)(r
->pend
- r
->pcurrent
)) > remaining
)
761 bytes
= (ssize_t
)remaining
;
763 memcpy(p
, r
->pcurrent
, (size_t)bytes
);
764 r
->pcurrent
+= bytes
;
766 if (r
->pcurrent
>= r
->pend
)
768 r
->pcurrent
= r
->pixels
;
774 remaining
-= (unsigned)bytes
;
778 DEBUG_printf(("1cupsRasterReadPixels: Returning %u", len
));
785 * 'cupsRasterWriteHeader()' - Write a raster page header from a version 1 page
788 * This function is deprecated. Use @link cupsRasterWriteHeader2@ instead.
793 unsigned /* O - 1 on success, 0 on failure */
794 cupsRasterWriteHeader(
795 cups_raster_t
*r
, /* I - Raster stream */
796 cups_page_header_t
*h
) /* I - Raster page header */
798 if (r
== NULL
|| r
->mode
== CUPS_RASTER_READ
)
802 * Make a copy of the header, and compute the number of raster
803 * lines in the page image...
806 memset(&(r
->header
), 0, sizeof(r
->header
));
807 memcpy(&(r
->header
), h
, sizeof(cups_page_header_t
));
809 if (!cups_raster_update(r
))
813 * Write the raster header...
816 if (r
->mode
== CUPS_RASTER_WRITE_PWG
)
819 * PWG raster data is always network byte order with much of the page header
823 cups_page_header2_t fh
; /* File page header */
825 memset(&fh
, 0, sizeof(fh
));
827 strlcpy(fh
.MediaClass
, "PwgRaster", sizeof(fh
.MediaClass
));
829 strlcpy(fh
.MediaColor
, r
->header
.MediaColor
, sizeof(fh
.MediaColor
));
830 strlcpy(fh
.MediaType
, r
->header
.MediaType
, sizeof(fh
.MediaType
));
831 strlcpy(fh
.OutputType
, r
->header
.OutputType
, sizeof(fh
.OutputType
));
832 /* PrintContentType */
834 fh
.CutMedia
= htonl(r
->header
.CutMedia
);
835 fh
.Duplex
= htonl(r
->header
.Duplex
);
836 fh
.HWResolution
[0] = htonl(r
->header
.HWResolution
[0]);
837 fh
.HWResolution
[1] = htonl(r
->header
.HWResolution
[1]);
838 fh
.ImagingBoundingBox
[0] = htonl(r
->header
.ImagingBoundingBox
[0]);
839 fh
.ImagingBoundingBox
[1] = htonl(r
->header
.ImagingBoundingBox
[1]);
840 fh
.ImagingBoundingBox
[2] = htonl(r
->header
.ImagingBoundingBox
[2]);
841 fh
.ImagingBoundingBox
[3] = htonl(r
->header
.ImagingBoundingBox
[3]);
842 fh
.InsertSheet
= htonl(r
->header
.InsertSheet
);
843 fh
.Jog
= htonl(r
->header
.Jog
);
844 fh
.LeadingEdge
= htonl(r
->header
.LeadingEdge
);
845 fh
.ManualFeed
= htonl(r
->header
.ManualFeed
);
846 fh
.MediaPosition
= htonl(r
->header
.MediaPosition
);
847 fh
.MediaWeight
= htonl(r
->header
.MediaWeight
);
848 fh
.NumCopies
= htonl(r
->header
.NumCopies
);
849 fh
.Orientation
= htonl(r
->header
.Orientation
);
850 fh
.PageSize
[0] = htonl(r
->header
.PageSize
[0]);
851 fh
.PageSize
[1] = htonl(r
->header
.PageSize
[1]);
852 fh
.Tumble
= htonl(r
->header
.Tumble
);
853 fh
.cupsWidth
= htonl(r
->header
.cupsWidth
);
854 fh
.cupsHeight
= htonl(r
->header
.cupsHeight
);
855 fh
.cupsBitsPerColor
= htonl(r
->header
.cupsBitsPerColor
);
856 fh
.cupsBitsPerPixel
= htonl(r
->header
.cupsBitsPerPixel
);
857 fh
.cupsBytesPerLine
= htonl(r
->header
.cupsBytesPerLine
);
858 fh
.cupsColorOrder
= htonl(r
->header
.cupsColorOrder
);
859 fh
.cupsColorSpace
= htonl(r
->header
.cupsColorSpace
);
860 fh
.cupsNumColors
= htonl(r
->header
.cupsNumColors
);
861 fh
.cupsInteger
[0] = htonl(r
->header
.cupsInteger
[0]);
863 fh
.cupsInteger
[1] = htonl(r
->header
.cupsInteger
[1]);
864 /* CrossFeedTransform */
865 fh
.cupsInteger
[2] = htonl(r
->header
.cupsInteger
[2]);
867 fh
.cupsInteger
[3] = htonl(r
->header
.cupsInteger
[3]);
869 fh
.cupsInteger
[4] = htonl(r
->header
.cupsInteger
[4]);
871 fh
.cupsInteger
[5] = htonl(r
->header
.cupsInteger
[5]);
873 fh
.cupsInteger
[6] = htonl(r
->header
.cupsInteger
[6]);
875 fh
.cupsInteger
[7] = htonl(r
->header
.cupsInteger
[7]);
877 fh
.cupsInteger
[8] = htonl(r
->header
.cupsInteger
[8]);
879 fh
.cupsInteger
[14] = htonl(r
->header
.cupsInteger
[14]);
880 /* VendorIdentifier */
881 fh
.cupsInteger
[15] = htonl(r
->header
.cupsInteger
[15]);
884 void *dst
= fh
.cupsReal
; /* Bypass bogus compiler warning */
885 void *src
= r
->header
.cupsReal
;
886 memcpy(dst
, src
, sizeof(fh
.cupsReal
) + sizeof(fh
.cupsString
));
889 strlcpy(fh
.cupsRenderingIntent
, r
->header
.cupsRenderingIntent
,
890 sizeof(fh
.cupsRenderingIntent
));
891 strlcpy(fh
.cupsPageSizeName
, r
->header
.cupsPageSizeName
,
892 sizeof(fh
.cupsPageSizeName
));
894 return (cups_raster_io(r
, (unsigned char *)&fh
, sizeof(fh
)) == sizeof(fh
));
897 return (cups_raster_io(r
, (unsigned char *)&(r
->header
), sizeof(r
->header
))
898 == sizeof(r
->header
));
903 * 'cupsRasterWriteHeader2()' - Write a raster page header from a version 2
904 * page header structure.
906 * The page header can be initialized using @link cupsRasterInterpretPPD@.
908 * @since CUPS 1.2/OS X 10.5@
911 unsigned /* O - 1 on success, 0 on failure */
912 cupsRasterWriteHeader2(
913 cups_raster_t
*r
, /* I - Raster stream */
914 cups_page_header2_t
*h
) /* I - Raster page header */
916 if (r
== NULL
|| r
->mode
== CUPS_RASTER_READ
)
920 * Make a copy of the header, and compute the number of raster
921 * lines in the page image...
924 memcpy(&(r
->header
), h
, sizeof(cups_page_header2_t
));
926 if (!cups_raster_update(r
))
930 * Write the raster header...
933 if (r
->mode
== CUPS_RASTER_WRITE_PWG
)
936 * PWG raster data is always network byte order with most of the page header
940 cups_page_header2_t fh
; /* File page header */
942 memset(&fh
, 0, sizeof(fh
));
943 strlcpy(fh
.MediaClass
, "PwgRaster", sizeof(fh
.MediaClass
));
944 strlcpy(fh
.MediaColor
, r
->header
.MediaColor
, sizeof(fh
.MediaColor
));
945 strlcpy(fh
.MediaType
, r
->header
.MediaType
, sizeof(fh
.MediaType
));
946 strlcpy(fh
.OutputType
, r
->header
.OutputType
, sizeof(fh
.OutputType
));
947 strlcpy(fh
.cupsRenderingIntent
, r
->header
.cupsRenderingIntent
,
948 sizeof(fh
.cupsRenderingIntent
));
949 strlcpy(fh
.cupsPageSizeName
, r
->header
.cupsPageSizeName
,
950 sizeof(fh
.cupsPageSizeName
));
952 fh
.CutMedia
= htonl(r
->header
.CutMedia
);
953 fh
.Duplex
= htonl(r
->header
.Duplex
);
954 fh
.HWResolution
[0] = htonl(r
->header
.HWResolution
[0]);
955 fh
.HWResolution
[1] = htonl(r
->header
.HWResolution
[1]);
956 fh
.ImagingBoundingBox
[0] = htonl(r
->header
.ImagingBoundingBox
[0]);
957 fh
.ImagingBoundingBox
[1] = htonl(r
->header
.ImagingBoundingBox
[1]);
958 fh
.ImagingBoundingBox
[2] = htonl(r
->header
.ImagingBoundingBox
[2]);
959 fh
.ImagingBoundingBox
[3] = htonl(r
->header
.ImagingBoundingBox
[3]);
960 fh
.InsertSheet
= htonl(r
->header
.InsertSheet
);
961 fh
.Jog
= htonl(r
->header
.Jog
);
962 fh
.LeadingEdge
= htonl(r
->header
.LeadingEdge
);
963 fh
.ManualFeed
= htonl(r
->header
.ManualFeed
);
964 fh
.MediaPosition
= htonl(r
->header
.MediaPosition
);
965 fh
.MediaWeight
= htonl(r
->header
.MediaWeight
);
966 fh
.NumCopies
= htonl(r
->header
.NumCopies
);
967 fh
.Orientation
= htonl(r
->header
.Orientation
);
968 fh
.PageSize
[0] = htonl(r
->header
.PageSize
[0]);
969 fh
.PageSize
[1] = htonl(r
->header
.PageSize
[1]);
970 fh
.Tumble
= htonl(r
->header
.Tumble
);
971 fh
.cupsWidth
= htonl(r
->header
.cupsWidth
);
972 fh
.cupsHeight
= htonl(r
->header
.cupsHeight
);
973 fh
.cupsBitsPerColor
= htonl(r
->header
.cupsBitsPerColor
);
974 fh
.cupsBitsPerPixel
= htonl(r
->header
.cupsBitsPerPixel
);
975 fh
.cupsBytesPerLine
= htonl(r
->header
.cupsBytesPerLine
);
976 fh
.cupsColorOrder
= htonl(r
->header
.cupsColorOrder
);
977 fh
.cupsColorSpace
= htonl(r
->header
.cupsColorSpace
);
978 fh
.cupsNumColors
= htonl(r
->header
.cupsNumColors
);
979 fh
.cupsInteger
[0] = htonl(r
->header
.cupsInteger
[0]);
980 fh
.cupsInteger
[1] = htonl(r
->header
.cupsInteger
[1]);
981 fh
.cupsInteger
[2] = htonl(r
->header
.cupsInteger
[2]);
982 fh
.cupsInteger
[3] = htonl((unsigned)(r
->header
.cupsImagingBBox
[0] * r
->header
.HWResolution
[0] / 72.0));
983 fh
.cupsInteger
[4] = htonl((unsigned)(r
->header
.cupsImagingBBox
[1] * r
->header
.HWResolution
[1] / 72.0));
984 fh
.cupsInteger
[5] = htonl((unsigned)(r
->header
.cupsImagingBBox
[2] * r
->header
.HWResolution
[0] / 72.0));
985 fh
.cupsInteger
[6] = htonl((unsigned)(r
->header
.cupsImagingBBox
[3] * r
->header
.HWResolution
[1] / 72.0));
986 fh
.cupsInteger
[7] = htonl(0xffffff);
988 return (cups_raster_io(r
, (unsigned char *)&fh
, sizeof(fh
)) == sizeof(fh
));
991 return (cups_raster_io(r
, (unsigned char *)&(r
->header
), sizeof(r
->header
))
992 == sizeof(r
->header
));
997 * 'cupsRasterWritePixels()' - Write raster pixels.
999 * For best performance, filters should write one or more whole lines.
1000 * The "cupsBytesPerLine" value from the page header can be used to allocate
1001 * the line buffer and as the number of bytes to write.
1004 unsigned /* O - Number of bytes written */
1005 cupsRasterWritePixels(cups_raster_t
*r
, /* I - Raster stream */
1006 unsigned char *p
, /* I - Bytes to write */
1007 unsigned len
)/* I - Number of bytes to write */
1009 ssize_t bytes
; /* Bytes read */
1010 unsigned remaining
; /* Bytes remaining */
1013 DEBUG_printf(("cupsRasterWritePixels(r=%p, p=%p, len=%u), remaining=%u\n",
1014 r
, p
, len
, r
->remaining
));
1016 if (r
== NULL
|| r
->mode
== CUPS_RASTER_READ
|| r
->remaining
== 0)
1022 * Without compression, just write the raster data raw unless the data needs
1026 r
->remaining
-= len
/ r
->header
.cupsBytesPerLine
;
1029 (r
->header
.cupsBitsPerColor
== 16 ||
1030 r
->header
.cupsBitsPerPixel
== 12 ||
1031 r
->header
.cupsBitsPerPixel
== 16))
1033 unsigned char *bufptr
; /* Pointer into write buffer */
1034 unsigned count
; /* Remaining count */
1037 * Allocate a write buffer as needed...
1040 if ((size_t)len
> r
->bufsize
)
1043 bufptr
= realloc(r
->buffer
, len
);
1045 bufptr
= malloc(len
);
1055 * Byte swap the pixels...
1058 for (bufptr
= r
->buffer
, count
= len
; count
> 1; count
-= 2, bufptr
+= 2)
1064 if (count
) /* This should never happen... */
1068 * Write the byte-swapped buffer...
1071 bytes
= cups_raster_io(r
, r
->buffer
, len
);
1074 bytes
= cups_raster_io(r
, p
, len
);
1083 * Otherwise, compress each line...
1086 for (remaining
= len
; remaining
> 0; remaining
-= (unsigned)bytes
, p
+= bytes
)
1089 * Figure out the number of remaining bytes on the current line...
1092 if ((bytes
= (ssize_t
)remaining
) > (ssize_t
)(r
->pend
- r
->pcurrent
))
1093 bytes
= (ssize_t
)(r
->pend
- r
->pcurrent
);
1098 * Check to see if this line is the same as the previous line...
1101 if (memcmp(p
, r
->pcurrent
, (size_t)bytes
))
1103 if (cups_raster_write(r
, r
->pixels
) <= 0)
1111 * Mark more bytes as the same...
1114 r
->pcurrent
+= bytes
;
1116 if (r
->pcurrent
>= r
->pend
)
1119 * Increase the repeat count...
1123 r
->pcurrent
= r
->pixels
;
1126 * Flush out this line if it is the last one...
1131 if (r
->remaining
== 0)
1133 if (cups_raster_write(r
, r
->pixels
) <= 0)
1138 else if (r
->count
== 256)
1140 if (cups_raster_write(r
, r
->pixels
) <= 0)
1154 * Copy the raster data to the buffer...
1157 memcpy(r
->pcurrent
, p
, (size_t)bytes
);
1159 r
->pcurrent
+= bytes
;
1161 if (r
->pcurrent
>= r
->pend
)
1164 * Increase the repeat count...
1168 r
->pcurrent
= r
->pixels
;
1171 * Flush out this line if it is the last one...
1176 if (r
->remaining
== 0)
1178 if (cups_raster_write(r
, r
->pixels
) <= 0)
1190 * 'cups_raster_read_header()' - Read a raster page header.
1193 static unsigned /* O - 1 on success, 0 on fail */
1194 cups_raster_read_header(
1195 cups_raster_t
*r
) /* I - Raster stream */
1197 size_t len
; /* Length for read/swap */
1200 DEBUG_printf(("3cups_raster_read_header(r=%p), r->mode=%d", r
, r
? r
->mode
: 0));
1202 if (r
== NULL
|| r
->mode
!= CUPS_RASTER_READ
)
1205 DEBUG_printf(("4cups_raster_read_header: r->iocount=" CUPS_LLFMT
, CUPS_LLCAST r
->iocount
));
1208 * Get the length of the raster header...
1211 if (r
->sync
== CUPS_RASTER_SYNCv1
|| r
->sync
== CUPS_RASTER_REVSYNCv1
)
1212 len
= sizeof(cups_page_header_t
);
1214 len
= sizeof(cups_page_header2_t
);
1216 DEBUG_printf(("4cups_raster_read_header: len=%d", (int)len
));
1219 * Read the header...
1222 memset(&(r
->header
), 0, sizeof(r
->header
));
1224 if (cups_raster_read(r
, (unsigned char *)&(r
->header
), len
) < (ssize_t
)len
)
1226 DEBUG_printf(("4cups_raster_read_header: EOF, r->iocount=" CUPS_LLFMT
, CUPS_LLCAST r
->iocount
));
1231 * Swap bytes as needed...
1236 unsigned *s
, /* Current word */
1237 temp
; /* Temporary copy */
1240 DEBUG_puts("4cups_raster_read_header: Swapping header bytes.");
1242 for (len
= 81, s
= &(r
->header
.AdvanceDistance
);
1247 *s
= ((temp
& 0xff) << 24) |
1248 ((temp
& 0xff00) << 8) |
1249 ((temp
& 0xff0000) >> 8) |
1250 ((temp
& 0xff000000) >> 24);
1252 DEBUG_printf(("4cups_raster_read_header: %08x => %08x", temp
, *s
));
1257 * Update the header and row count...
1260 if (!cups_raster_update(r
))
1263 DEBUG_printf(("4cups_raster_read_header: cupsBitsPerPixel=%u, cupsBitsPerColor=%u, cupsBytesPerLine=%u, cupsWidth=%u, cupsHeight=%u, r->bpp=%d", r
->header
.cupsBitsPerPixel
, r
->header
.cupsBitsPerColor
, r
->header
.cupsBytesPerLine
, r
->header
.cupsWidth
, r
->header
.cupsHeight
, r
->bpp
));
1265 return (r
->header
.cupsBitsPerPixel
> 0 && r
->header
.cupsBitsPerPixel
<= 240 && r
->header
.cupsBitsPerColor
> 0 && r
->header
.cupsBitsPerColor
<= 16 && r
->header
.cupsBytesPerLine
> 0 && r
->header
.cupsBytesPerLine
<= 0x7fffffff && r
->header
.cupsHeight
!= 0 && (r
->header
.cupsBytesPerLine
% r
->bpp
) == 0);
1270 * 'cups_raster_io()' - Read/write bytes from a context, handling interruptions.
1273 static ssize_t
/* O - Bytes read/write or -1 */
1274 cups_raster_io(cups_raster_t
*r
, /* I - Raster stream */
1275 unsigned char *buf
, /* I - Buffer for read/write */
1276 size_t bytes
) /* I - Number of bytes to read/write */
1278 ssize_t count
, /* Number of bytes read/written */
1279 total
; /* Total bytes read/written */
1282 DEBUG_printf(("5cups_raster_io(r=%p, buf=%p, bytes=" CUPS_LLFMT
")", r
, buf
, CUPS_LLCAST bytes
));
1284 for (total
= 0; total
< (ssize_t
)bytes
; total
+= count
, buf
+= count
)
1286 count
= (*r
->iocb
)(r
->ctx
, buf
, bytes
- (size_t)total
);
1288 DEBUG_printf(("6cups_raster_io: count=%d, total=%d", (int)count
, (int)total
));
1291 DEBUG_puts("6cups_raster_io: Returning 0.");
1296 DEBUG_puts("6cups_raster_io: Returning -1 on error.");
1301 r
->iocount
+= (size_t)count
;
1305 DEBUG_printf(("6cups_raster_io: Returning " CUPS_LLFMT
".", CUPS_LLCAST total
));
1312 * 'cups_raster_read()' - Read through the raster buffer.
1315 static ssize_t
/* O - Number of bytes read */
1316 cups_raster_read(cups_raster_t
*r
, /* I - Raster stream */
1317 unsigned char *buf
, /* I - Buffer */
1318 size_t bytes
) /* I - Number of bytes to read */
1320 ssize_t count
, /* Number of bytes read */
1321 remaining
, /* Remaining bytes in buffer */
1322 total
; /* Total bytes read */
1325 DEBUG_printf(("5cups_raster_read(r=%p, buf=%p, bytes=" CUPS_LLFMT
")\n", r
, buf
, CUPS_LLCAST bytes
));
1328 return (cups_raster_io(r
, buf
, bytes
));
1331 * Allocate a read buffer as needed...
1334 count
= (ssize_t
)(2 * r
->header
.cupsBytesPerLine
);
1338 if ((size_t)count
> r
->bufsize
)
1340 ssize_t offset
= r
->bufptr
- r
->buffer
;
1341 /* Offset to current start of buffer */
1342 ssize_t end
= r
->bufend
- r
->buffer
;/* Offset to current end of buffer */
1343 unsigned char *rptr
; /* Pointer in read buffer */
1346 rptr
= realloc(r
->buffer
, (size_t)count
);
1348 rptr
= malloc((size_t)count
);
1354 r
->bufptr
= rptr
+ offset
;
1355 r
->bufend
= rptr
+ end
;
1356 r
->bufsize
= (size_t)count
;
1360 * Loop until we have read everything...
1363 for (total
= 0, remaining
= (int)(r
->bufend
- r
->bufptr
);
1364 total
< (ssize_t
)bytes
;
1365 total
+= count
, buf
+= count
)
1367 count
= (ssize_t
)bytes
- total
;
1369 DEBUG_printf(("6cups_raster_read: count=" CUPS_LLFMT
", remaining=" CUPS_LLFMT
", buf=%p, bufptr=%p, bufend=%p", CUPS_LLCAST count
, CUPS_LLCAST remaining
, buf
, r
->bufptr
, r
->bufend
));
1376 * Read into the raster buffer and then copy...
1379 remaining
= (*r
->iocb
)(r
->ctx
, r
->buffer
, r
->bufsize
);
1383 r
->bufptr
= r
->buffer
;
1384 r
->bufend
= r
->buffer
+ remaining
;
1387 r
->iocount
+= (size_t)remaining
;
1393 * Read directly into "buf"...
1396 count
= (*r
->iocb
)(r
->ctx
, buf
, (size_t)count
);
1402 r
->iocount
+= (size_t)count
;
1410 * Copy bytes from raster buffer to "buf"...
1413 if (count
> remaining
)
1422 *buf
= *(r
->bufptr
)++;
1425 else if (count
< 128)
1428 * Copy up to 127 bytes without using memcpy(); this is
1429 * faster because it avoids an extra function call and is
1430 * often further optimized by the compiler...
1433 unsigned char *bufptr
; /* Temporary buffer pointer */
1437 for (bufptr
= r
->bufptr
; count
> 0; count
--, total
++)
1445 * Use memcpy() for a large read...
1448 memcpy(buf
, r
->bufptr
, (size_t)count
);
1454 DEBUG_printf(("6cups_raster_read: Returning %ld", (long)total
));
1461 * 'cups_raster_update()' - Update the raster header and row count for the
1465 static int /* O - 1 on success, 0 on failure */
1466 cups_raster_update(cups_raster_t
*r
) /* I - Raster stream */
1468 if (r
->sync
== CUPS_RASTER_SYNCv1
|| r
->sync
== CUPS_RASTER_REVSYNCv1
||
1469 r
->header
.cupsNumColors
== 0)
1472 * Set the "cupsNumColors" field according to the colorspace...
1475 switch (r
->header
.cupsColorSpace
)
1477 case CUPS_CSPACE_W
:
1478 case CUPS_CSPACE_K
:
1479 case CUPS_CSPACE_WHITE
:
1480 case CUPS_CSPACE_GOLD
:
1481 case CUPS_CSPACE_SILVER
:
1482 case CUPS_CSPACE_SW
:
1483 r
->header
.cupsNumColors
= 1;
1486 case CUPS_CSPACE_RGB
:
1487 case CUPS_CSPACE_CMY
:
1488 case CUPS_CSPACE_YMC
:
1489 case CUPS_CSPACE_CIEXYZ
:
1490 case CUPS_CSPACE_CIELab
:
1491 case CUPS_CSPACE_SRGB
:
1492 case CUPS_CSPACE_ADOBERGB
:
1493 case CUPS_CSPACE_ICC1
:
1494 case CUPS_CSPACE_ICC2
:
1495 case CUPS_CSPACE_ICC3
:
1496 case CUPS_CSPACE_ICC4
:
1497 case CUPS_CSPACE_ICC5
:
1498 case CUPS_CSPACE_ICC6
:
1499 case CUPS_CSPACE_ICC7
:
1500 case CUPS_CSPACE_ICC8
:
1501 case CUPS_CSPACE_ICC9
:
1502 case CUPS_CSPACE_ICCA
:
1503 case CUPS_CSPACE_ICCB
:
1504 case CUPS_CSPACE_ICCC
:
1505 case CUPS_CSPACE_ICCD
:
1506 case CUPS_CSPACE_ICCE
:
1507 case CUPS_CSPACE_ICCF
:
1508 r
->header
.cupsNumColors
= 3;
1511 case CUPS_CSPACE_RGBA
:
1512 case CUPS_CSPACE_RGBW
:
1513 case CUPS_CSPACE_CMYK
:
1514 case CUPS_CSPACE_YMCK
:
1515 case CUPS_CSPACE_KCMY
:
1516 case CUPS_CSPACE_GMCK
:
1517 case CUPS_CSPACE_GMCS
:
1518 r
->header
.cupsNumColors
= 4;
1521 case CUPS_CSPACE_KCMYcm
:
1522 if (r
->header
.cupsBitsPerPixel
< 8)
1523 r
->header
.cupsNumColors
= 6;
1525 r
->header
.cupsNumColors
= 4;
1528 case CUPS_CSPACE_DEVICE1
:
1529 case CUPS_CSPACE_DEVICE2
:
1530 case CUPS_CSPACE_DEVICE3
:
1531 case CUPS_CSPACE_DEVICE4
:
1532 case CUPS_CSPACE_DEVICE5
:
1533 case CUPS_CSPACE_DEVICE6
:
1534 case CUPS_CSPACE_DEVICE7
:
1535 case CUPS_CSPACE_DEVICE8
:
1536 case CUPS_CSPACE_DEVICE9
:
1537 case CUPS_CSPACE_DEVICEA
:
1538 case CUPS_CSPACE_DEVICEB
:
1539 case CUPS_CSPACE_DEVICEC
:
1540 case CUPS_CSPACE_DEVICED
:
1541 case CUPS_CSPACE_DEVICEE
:
1542 case CUPS_CSPACE_DEVICEF
:
1543 r
->header
.cupsNumColors
= r
->header
.cupsColorSpace
-
1544 CUPS_CSPACE_DEVICE1
+ 1;
1548 /* Unknown color space */
1554 * Set the number of bytes per pixel/color...
1557 if (r
->header
.cupsColorOrder
== CUPS_ORDER_CHUNKED
)
1558 r
->bpp
= (r
->header
.cupsBitsPerPixel
+ 7) / 8;
1560 r
->bpp
= (r
->header
.cupsBitsPerColor
+ 7) / 8;
1566 * Set the number of remaining rows...
1569 if (r
->header
.cupsColorOrder
== CUPS_ORDER_PLANAR
)
1570 r
->remaining
= r
->header
.cupsHeight
* r
->header
.cupsNumColors
;
1572 r
->remaining
= r
->header
.cupsHeight
;
1575 * Allocate the compression buffer...
1580 if (r
->pixels
!= NULL
)
1583 if ((r
->pixels
= calloc(r
->header
.cupsBytesPerLine
, 1)) == NULL
)
1592 r
->pcurrent
= r
->pixels
;
1593 r
->pend
= r
->pixels
+ r
->header
.cupsBytesPerLine
;
1602 * 'cups_raster_write()' - Write a row of compressed raster data...
1605 static ssize_t
/* O - Number of bytes written */
1607 cups_raster_t
*r
, /* I - Raster stream */
1608 const unsigned char *pixels
) /* I - Pixel data to write */
1610 const unsigned char *start
, /* Start of sequence */
1611 *ptr
, /* Current pointer in sequence */
1612 *pend
, /* End of raster buffer */
1613 *plast
; /* Pointer to last pixel */
1614 unsigned char *wptr
; /* Pointer into write buffer */
1615 unsigned bpp
, /* Bytes per pixel */
1619 DEBUG_printf(("3cups_raster_write(r=%p, pixels=%p)\n", r
, pixels
));
1622 * Allocate a write buffer as needed...
1625 count
= r
->header
.cupsBytesPerLine
* 2;
1629 if ((size_t)count
> r
->bufsize
)
1632 wptr
= realloc(r
->buffer
, count
);
1634 wptr
= malloc(count
);
1638 DEBUG_printf(("4cups_raster_write: Unable to allocate " CUPS_LLFMT
" bytes for raster buffer: %s", CUPS_LLCAST count
, strerror(errno
)));
1647 * Write the row repeat count...
1651 pend
= pixels
+ r
->header
.cupsBytesPerLine
;
1654 *wptr
++ = (unsigned char)(r
->count
- 1);
1657 * Write using a modified PackBits compression...
1660 for (ptr
= pixels
; ptr
< pend
;)
1668 * Encode a single pixel at the end...
1672 for (count
= bpp
; count
> 0; count
--)
1675 else if (!memcmp(start
, ptr
, bpp
))
1678 * Encode a sequence of repeating pixels...
1681 for (count
= 2; count
< 128 && ptr
< plast
; count
++, ptr
+= bpp
)
1682 if (memcmp(ptr
, ptr
+ bpp
, bpp
))
1685 *wptr
++ = (unsigned char)(count
- 1);
1686 for (count
= bpp
; count
> 0; count
--)
1692 * Encode a sequence of non-repeating pixels...
1695 for (count
= 1; count
< 128 && ptr
< plast
; count
++, ptr
+= bpp
)
1696 if (!memcmp(ptr
, ptr
+ bpp
, bpp
))
1699 if (ptr
>= plast
&& count
< 128)
1705 *wptr
++ = (unsigned char)(257 - count
);
1708 memcpy(wptr
, start
, count
);
1713 DEBUG_printf(("4cups_raster_write: Writing " CUPS_LLFMT
" bytes.", CUPS_LLCAST (wptr
- r
->buffer
)));
1715 return (cups_raster_io(r
, r
->buffer
, (size_t)(wptr
- r
->buffer
)));
1720 * 'cups_read_fd()' - Read bytes from a file.
1723 static ssize_t
/* O - Bytes read or -1 */
1724 cups_read_fd(void *ctx
, /* I - File descriptor as pointer */
1725 unsigned char *buf
, /* I - Buffer for read */
1726 size_t bytes
) /* I - Maximum number of bytes to read */
1728 int fd
= (int)((intptr_t)ctx
);
1729 /* File descriptor */
1730 ssize_t count
; /* Number of bytes read */
1733 #ifdef WIN32 /* Sigh */
1734 while ((count
= read(fd
, buf
, (unsigned)bytes
)) < 0)
1736 while ((count
= read(fd
, buf
, bytes
)) < 0)
1738 if (errno
!= EINTR
&& errno
!= EAGAIN
)
1740 DEBUG_printf(("4cups_read_fd: %s", strerror(errno
)));
1744 DEBUG_printf(("4cups_read_fd: Returning %d bytes.", (int)count
));
1751 * 'cups_swap()' - Swap bytes in raster data...
1755 cups_swap(unsigned char *buf
, /* I - Buffer to swap */
1756 size_t bytes
) /* I - Number of bytes to swap */
1758 unsigned char even
, odd
; /* Temporary variables */
1777 * 'cups_write_fd()' - Write bytes to a file.
1780 static ssize_t
/* O - Bytes written or -1 */
1781 cups_write_fd(void *ctx
, /* I - File descriptor pointer */
1782 unsigned char *buf
, /* I - Bytes to write */
1783 size_t bytes
) /* I - Number of bytes to write */
1785 int fd
= (int)((intptr_t)ctx
);
1786 /* File descriptor */
1787 ssize_t count
; /* Number of bytes written */
1790 #ifdef WIN32 /* Sigh */
1791 while ((count
= write(fd
, buf
, (unsigned)bytes
)) < 0)
1793 while ((count
= write(fd
, buf
, bytes
)) < 0)
1795 if (errno
!= EINTR
&& errno
!= EAGAIN
)
1797 DEBUG_printf(("4cups_write_fd: %s", strerror(errno
)));