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 h
->ImagingBoundingBox
[2] = h
->PageSize
[0];
143 h
->ImagingBoundingBox
[3] = h
->PageSize
[1];
145 h
->HWResolution
[0] = (unsigned)xdpi
;
146 h
->HWResolution
[1] = (unsigned)ydpi
;
148 h
->cupsWidth
= (unsigned)(media
->width
* xdpi
/ 2540);
149 h
->cupsHeight
= (unsigned)(media
->length
* ydpi
/ 2540);
151 if (h
->cupsWidth
> 0x00ffffff || h
->cupsHeight
> 0x00ffffff)
153 _cupsRasterAddError("Raster dimensions too large.");
157 h
->cupsInteger
[CUPS_RASTER_PWG_ImageBoxRight
] = h
->cupsWidth
;
158 h
->cupsInteger
[CUPS_RASTER_PWG_ImageBoxBottom
] = h
->cupsHeight
;
161 * Colorspace and bytes per line...
164 if (!strcmp(type
, "adobe-rgb_8"))
166 h
->cupsBitsPerColor
= 8;
167 h
->cupsBitsPerPixel
= 24;
168 h
->cupsColorSpace
= CUPS_CSPACE_ADOBERGB
;
170 else if (!strcmp(type
, "adobe-rgb_16"))
172 h
->cupsBitsPerColor
= 16;
173 h
->cupsBitsPerPixel
= 48;
174 h
->cupsColorSpace
= CUPS_CSPACE_ADOBERGB
;
176 else if (!strcmp(type
, "black_1"))
178 h
->cupsBitsPerColor
= 1;
179 h
->cupsBitsPerPixel
= 1;
180 h
->cupsColorSpace
= CUPS_CSPACE_K
;
182 else if (!strcmp(type
, "black_8"))
184 h
->cupsBitsPerColor
= 8;
185 h
->cupsBitsPerPixel
= 8;
186 h
->cupsColorSpace
= CUPS_CSPACE_K
;
188 else if (!strcmp(type
, "black_16"))
190 h
->cupsBitsPerColor
= 16;
191 h
->cupsBitsPerPixel
= 16;
192 h
->cupsColorSpace
= CUPS_CSPACE_K
;
194 else if (!strcmp(type
, "cmyk_8"))
196 h
->cupsBitsPerColor
= 8;
197 h
->cupsBitsPerPixel
= 32;
198 h
->cupsColorSpace
= CUPS_CSPACE_CMYK
;
200 else if (!strcmp(type
, "cmyk_16"))
202 h
->cupsBitsPerColor
= 16;
203 h
->cupsBitsPerPixel
= 64;
204 h
->cupsColorSpace
= CUPS_CSPACE_CMYK
;
206 else if (!strncmp(type
, "device", 6) && type
[6] >= '1' && type
[6] <= '9')
208 int ncolors
, bits
; /* Number of colors and bits */
211 if (sscanf(type
, "device%d_%d", &ncolors
, &bits
) != 2 || ncolors
> 15 || (bits
!= 8 && bits
!= 16))
213 _cupsRasterAddError("Unsupported raster type \'%s\'.", type
);
217 h
->cupsBitsPerColor
= (unsigned)bits
;
218 h
->cupsBitsPerPixel
= (unsigned)(ncolors
* bits
);
219 h
->cupsColorSpace
= (cups_cspace_t
)(CUPS_CSPACE_DEVICE1
+ ncolors
- 1);
221 else if (!strcmp(type
, "rgb_8"))
223 h
->cupsBitsPerColor
= 8;
224 h
->cupsBitsPerPixel
= 24;
225 h
->cupsColorSpace
= CUPS_CSPACE_RGB
;
227 else if (!strcmp(type
, "rgb_16"))
229 h
->cupsBitsPerColor
= 16;
230 h
->cupsBitsPerPixel
= 48;
231 h
->cupsColorSpace
= CUPS_CSPACE_RGB
;
233 else if (!strcmp(type
, "sgray_1"))
235 h
->cupsBitsPerColor
= 1;
236 h
->cupsBitsPerPixel
= 1;
237 h
->cupsColorSpace
= CUPS_CSPACE_SW
;
239 else if (!strcmp(type
, "sgray_8"))
241 h
->cupsBitsPerColor
= 8;
242 h
->cupsBitsPerPixel
= 8;
243 h
->cupsColorSpace
= CUPS_CSPACE_SW
;
245 else if (!strcmp(type
, "sgray_16"))
247 h
->cupsBitsPerColor
= 16;
248 h
->cupsBitsPerPixel
= 16;
249 h
->cupsColorSpace
= CUPS_CSPACE_SW
;
251 else if (!strcmp(type
, "srgb_8"))
253 h
->cupsBitsPerColor
= 8;
254 h
->cupsBitsPerPixel
= 24;
255 h
->cupsColorSpace
= CUPS_CSPACE_SRGB
;
257 else if (!strcmp(type
, "srgb_16"))
259 h
->cupsBitsPerColor
= 16;
260 h
->cupsBitsPerPixel
= 48;
261 h
->cupsColorSpace
= CUPS_CSPACE_SRGB
;
265 _cupsRasterAddError("Unsupported raster type \'%s\'.", type
);
269 h
->cupsColorOrder
= CUPS_ORDER_CHUNKED
;
270 h
->cupsNumColors
= h
->cupsBitsPerPixel
/ h
->cupsBitsPerColor
;
271 h
->cupsBytesPerLine
= (h
->cupsWidth
* h
->cupsBitsPerPixel
+ 7) / 8;
277 h
->cupsInteger
[CUPS_RASTER_PWG_CrossFeedTransform
] = 1;
278 h
->cupsInteger
[CUPS_RASTER_PWG_FeedTransform
] = 1;
282 if (!strcmp(sides
, "two-sided-long-edge"))
286 else if (!strcmp(sides
, "two-sided-short-edge"))
291 else if (strcmp(sides
, "one-sided"))
293 _cupsRasterAddError("Unsupported sides value \'%s\'.", sides
);
299 if (!strcmp(sheet_back
, "flipped"))
302 h
->cupsInteger
[CUPS_RASTER_PWG_CrossFeedTransform
] = 0xffffffffU
;
304 h
->cupsInteger
[CUPS_RASTER_PWG_FeedTransform
] = 0xffffffffU
;
306 else if (!strcmp(sheet_back
, "manual-tumble"))
310 h
->cupsInteger
[CUPS_RASTER_PWG_CrossFeedTransform
] = 0xffffffffU
;
311 h
->cupsInteger
[CUPS_RASTER_PWG_FeedTransform
] = 0xffffffffU
;
314 else if (!strcmp(sheet_back
, "rotated"))
318 h
->cupsInteger
[CUPS_RASTER_PWG_CrossFeedTransform
] = 0xffffffffU
;
319 h
->cupsInteger
[CUPS_RASTER_PWG_FeedTransform
] = 0xffffffffU
;
322 else if (strcmp(sheet_back
, "normal"))
324 _cupsRasterAddError("Unsupported sheet_back value \'%s\'.", sheet_back
);
335 * 'cupsRasterOpen()' - Open a raster stream using a file descriptor.
337 * This function associates a raster stream with the given file descriptor.
338 * For most printer driver filters, "fd" will be 0 (stdin). For most raster
339 * image processor (RIP) filters that generate raster data, "fd" will be 1
342 * When writing raster data, the @code CUPS_RASTER_WRITE@,
343 * @code CUPS_RASTER_WRITE_COMPRESS@, or @code CUPS_RASTER_WRITE_PWG@ mode can
344 * be used - compressed and PWG output is generally 25-50% smaller but adds a
345 * 100-300% execution time overhead.
348 cups_raster_t
* /* O - New stream */
349 cupsRasterOpen(int fd
, /* I - File descriptor */
350 cups_mode_t mode
) /* I - Mode - @code CUPS_RASTER_READ@,
351 @code CUPS_RASTER_WRITE@,
352 @code CUPS_RASTER_WRITE_COMPRESSED@,
353 or @code CUPS_RASTER_WRITE_PWG@ */
355 if (mode
== CUPS_RASTER_READ
)
356 return (cupsRasterOpenIO(cups_read_fd
, (void *)((intptr_t)fd
), mode
));
358 return (cupsRasterOpenIO(cups_write_fd
, (void *)((intptr_t)fd
), mode
));
363 * 'cupsRasterOpenIO()' - Open a raster stream using a callback function.
365 * This function associates a raster stream with the given callback function and
368 * When writing raster data, the @code CUPS_RASTER_WRITE@,
369 * @code CUPS_RASTER_WRITE_COMPRESS@, or @code CUPS_RASTER_WRITE_PWG@ mode can
370 * be used - compressed and PWG output is generally 25-50% smaller but adds a
371 * 100-300% execution time overhead.
374 cups_raster_t
* /* O - New stream */
376 cups_raster_iocb_t iocb
, /* I - Read/write callback */
377 void *ctx
, /* I - Context pointer for callback */
378 cups_mode_t mode
) /* I - Mode - @code CUPS_RASTER_READ@,
379 @code CUPS_RASTER_WRITE@,
380 @code CUPS_RASTER_WRITE_COMPRESSED@,
381 or @code CUPS_RASTER_WRITE_PWG@ */
383 cups_raster_t
*r
; /* New stream */
386 _cupsRasterClearError();
388 if ((r
= calloc(sizeof(cups_raster_t
), 1)) == NULL
)
390 _cupsRasterAddError("Unable to allocate memory for raster stream: %s\n",
399 if (mode
== CUPS_RASTER_READ
)
402 * Open for read - get sync word...
405 if (cups_raster_io(r
, (unsigned char *)&(r
->sync
), sizeof(r
->sync
)) !=
408 _cupsRasterAddError("Unable to read header from raster stream: %s\n",
414 if (r
->sync
!= CUPS_RASTER_SYNC
&&
415 r
->sync
!= CUPS_RASTER_REVSYNC
&&
416 r
->sync
!= CUPS_RASTER_SYNCv1
&&
417 r
->sync
!= CUPS_RASTER_REVSYNCv1
&&
418 r
->sync
!= CUPS_RASTER_SYNCv2
&&
419 r
->sync
!= CUPS_RASTER_REVSYNCv2
)
421 _cupsRasterAddError("Unknown raster format %08x!\n", r
->sync
);
426 if (r
->sync
== CUPS_RASTER_SYNCv2
||
427 r
->sync
== CUPS_RASTER_REVSYNCv2
)
430 if (r
->sync
== CUPS_RASTER_REVSYNC
||
431 r
->sync
== CUPS_RASTER_REVSYNCv1
||
432 r
->sync
== CUPS_RASTER_REVSYNCv2
)
435 DEBUG_printf(("1cupsRasterOpenIO: r->swapped=%d, r->sync=%08x\n", r
->swapped
, r
->sync
));
440 * Open for write - put sync word...
446 case CUPS_RASTER_WRITE
:
447 r
->sync
= CUPS_RASTER_SYNC
;
450 case CUPS_RASTER_WRITE_COMPRESSED
:
452 r
->sync
= CUPS_RASTER_SYNCv2
;
455 case CUPS_RASTER_WRITE_PWG
:
457 r
->sync
= htonl(CUPS_RASTER_SYNC_PWG
);
458 r
->swapped
= r
->sync
!= CUPS_RASTER_SYNC_PWG
;
462 if (cups_raster_io(r
, (unsigned char *)&(r
->sync
), sizeof(r
->sync
)) < (ssize_t
)sizeof(r
->sync
))
464 _cupsRasterAddError("Unable to write raster stream header: %s\n",
476 * 'cupsRasterReadHeader()' - Read a raster page header and store it in a
477 * version 1 page header structure.
479 * This function is deprecated. Use @link cupsRasterReadHeader2@ instead.
481 * Version 1 page headers were used in CUPS 1.0 and 1.1 and contain a subset
482 * of the version 2 page header data. This function handles reading version 2
483 * page headers and copying only the version 1 data into the provided buffer.
488 unsigned /* O - 1 on success, 0 on failure/end-of-file */
489 cupsRasterReadHeader(
490 cups_raster_t
*r
, /* I - Raster stream */
491 cups_page_header_t
*h
) /* I - Pointer to header data */
494 * Get the raster header...
497 if (!cups_raster_read_header(r
))
499 memset(h
, 0, sizeof(cups_page_header_t
));
504 * Copy the header to the user-supplied buffer...
507 memcpy(h
, &(r
->header
), sizeof(cups_page_header_t
));
514 * 'cupsRasterReadHeader2()' - Read a raster page header and store it in a
515 * version 2 page header structure.
517 * @since CUPS 1.2/OS X 10.5@
520 unsigned /* O - 1 on success, 0 on failure/end-of-file */
521 cupsRasterReadHeader2(
522 cups_raster_t
*r
, /* I - Raster stream */
523 cups_page_header2_t
*h
) /* I - Pointer to header data */
526 * Get the raster header...
529 DEBUG_printf(("cupsRasterReadHeader2(r=%p, h=%p)", r
, h
));
531 if (!cups_raster_read_header(r
))
533 memset(h
, 0, sizeof(cups_page_header2_t
));
538 * Copy the header to the user-supplied buffer...
541 memcpy(h
, &(r
->header
), sizeof(cups_page_header2_t
));
548 * 'cupsRasterReadPixels()' - Read raster pixels.
550 * For best performance, filters should read one or more whole lines.
551 * The "cupsBytesPerLine" value from the page header can be used to allocate
552 * the line buffer and as the number of bytes to read.
555 unsigned /* O - Number of bytes read */
556 cupsRasterReadPixels(cups_raster_t
*r
, /* I - Raster stream */
557 unsigned char *p
, /* I - Pointer to pixel buffer */
558 unsigned len
) /* I - Number of bytes to read */
560 ssize_t bytes
; /* Bytes read */
561 unsigned cupsBytesPerLine
; /* cupsBytesPerLine value */
562 unsigned remaining
; /* Bytes remaining */
563 unsigned char *ptr
, /* Pointer to read buffer */
564 byte
, /* Byte from file */
565 *temp
; /* Pointer into buffer */
566 unsigned count
; /* Repetition count */
569 DEBUG_printf(("cupsRasterReadPixels(r=%p, p=%p, len=%u)", r
, p
, len
));
571 if (r
== NULL
|| r
->mode
!= CUPS_RASTER_READ
|| r
->remaining
== 0 ||
572 r
->header
.cupsBytesPerLine
== 0)
574 DEBUG_puts("1cupsRasterReadPixels: Returning 0.");
578 DEBUG_printf(("1cupsRasterReadPixels: compressed=%d, remaining=%u", r
->compressed
, r
->remaining
));
583 * Read without compression...
586 r
->remaining
-= len
/ r
->header
.cupsBytesPerLine
;
588 if (cups_raster_io(r
, p
, len
) < (ssize_t
)len
)
590 DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
595 * Swap bytes as needed...
599 (r
->header
.cupsBitsPerColor
== 16 ||
600 r
->header
.cupsBitsPerPixel
== 12 ||
601 r
->header
.cupsBitsPerPixel
== 16))
608 DEBUG_printf(("1cupsRasterReadPixels: Returning %u", len
));
614 * Read compressed data...
618 cupsBytesPerLine
= r
->header
.cupsBytesPerLine
;
620 while (remaining
> 0 && r
->remaining
> 0)
625 * Need to read a new row...
628 if (remaining
== cupsBytesPerLine
)
634 * Read using a modified PackBits compression...
637 if (!cups_raster_read(r
, &byte
, 1))
639 DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
643 r
->count
= (unsigned)byte
+ 1;
649 bytes
= (ssize_t
)cupsBytesPerLine
;
654 * Get a new repeat count...
657 if (!cups_raster_read(r
, &byte
, 1))
659 DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
666 * Copy N literal pixels...
669 count
= (unsigned)(257 - byte
) * r
->bpp
;
671 if (count
> (unsigned)bytes
)
672 count
= (unsigned)bytes
;
674 if (!cups_raster_read(r
, temp
, count
))
676 DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
686 * Repeat the next N bytes...
689 count
= ((unsigned)byte
+ 1) * r
->bpp
;
690 if (count
> (unsigned)bytes
)
691 count
= (unsigned)bytes
;
698 if (!cups_raster_read(r
, temp
, r
->bpp
))
700 DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
709 memcpy(temp
, temp
- r
->bpp
, r
->bpp
);
717 * Swap bytes as needed...
720 if ((r
->header
.cupsBitsPerColor
== 16 ||
721 r
->header
.cupsBitsPerPixel
== 12 ||
722 r
->header
.cupsBitsPerPixel
== 16) &&
724 cups_swap(ptr
, (size_t)bytes
);
730 if (remaining
>= cupsBytesPerLine
)
732 bytes
= (ssize_t
)cupsBytesPerLine
;
733 r
->pcurrent
= r
->pixels
;
739 bytes
= (ssize_t
)remaining
;
740 r
->pcurrent
= r
->pixels
+ bytes
;
744 * Copy data as needed...
748 memcpy(p
, ptr
, (size_t)bytes
);
753 * Copy fragment from buffer...
756 if ((unsigned)(bytes
= (int)(r
->pend
- r
->pcurrent
)) > remaining
)
757 bytes
= (ssize_t
)remaining
;
759 memcpy(p
, r
->pcurrent
, (size_t)bytes
);
760 r
->pcurrent
+= bytes
;
762 if (r
->pcurrent
>= r
->pend
)
764 r
->pcurrent
= r
->pixels
;
770 remaining
-= (unsigned)bytes
;
774 DEBUG_printf(("1cupsRasterReadPixels: Returning %u", len
));
781 * 'cupsRasterWriteHeader()' - Write a raster page header from a version 1 page
784 * This function is deprecated. Use @link cupsRasterWriteHeader2@ instead.
789 unsigned /* O - 1 on success, 0 on failure */
790 cupsRasterWriteHeader(
791 cups_raster_t
*r
, /* I - Raster stream */
792 cups_page_header_t
*h
) /* I - Raster page header */
794 if (r
== NULL
|| r
->mode
== CUPS_RASTER_READ
)
798 * Make a copy of the header, and compute the number of raster
799 * lines in the page image...
802 memset(&(r
->header
), 0, sizeof(r
->header
));
803 memcpy(&(r
->header
), h
, sizeof(cups_page_header_t
));
805 if (!cups_raster_update(r
))
809 * Write the raster header...
812 if (r
->mode
== CUPS_RASTER_WRITE_PWG
)
815 * PWG raster data is always network byte order with much of the page header
819 cups_page_header2_t fh
; /* File page header */
821 memset(&fh
, 0, sizeof(fh
));
823 strlcpy(fh
.MediaClass
, "PwgRaster", sizeof(fh
.MediaClass
));
825 strlcpy(fh
.MediaColor
, r
->header
.MediaColor
, sizeof(fh
.MediaColor
));
826 strlcpy(fh
.MediaType
, r
->header
.MediaType
, sizeof(fh
.MediaType
));
827 strlcpy(fh
.OutputType
, r
->header
.OutputType
, sizeof(fh
.OutputType
));
828 /* PrintContentType */
830 fh
.CutMedia
= htonl(r
->header
.CutMedia
);
831 fh
.Duplex
= htonl(r
->header
.Duplex
);
832 fh
.HWResolution
[0] = htonl(r
->header
.HWResolution
[0]);
833 fh
.HWResolution
[1] = htonl(r
->header
.HWResolution
[1]);
834 fh
.ImagingBoundingBox
[0] = htonl(r
->header
.ImagingBoundingBox
[0]);
835 fh
.ImagingBoundingBox
[1] = htonl(r
->header
.ImagingBoundingBox
[1]);
836 fh
.ImagingBoundingBox
[2] = htonl(r
->header
.ImagingBoundingBox
[2]);
837 fh
.ImagingBoundingBox
[3] = htonl(r
->header
.ImagingBoundingBox
[3]);
838 fh
.InsertSheet
= htonl(r
->header
.InsertSheet
);
839 fh
.Jog
= htonl(r
->header
.Jog
);
840 fh
.LeadingEdge
= htonl(r
->header
.LeadingEdge
);
841 fh
.ManualFeed
= htonl(r
->header
.ManualFeed
);
842 fh
.MediaPosition
= htonl(r
->header
.MediaPosition
);
843 fh
.MediaWeight
= htonl(r
->header
.MediaWeight
);
844 fh
.NumCopies
= htonl(r
->header
.NumCopies
);
845 fh
.Orientation
= htonl(r
->header
.Orientation
);
846 fh
.PageSize
[0] = htonl(r
->header
.PageSize
[0]);
847 fh
.PageSize
[1] = htonl(r
->header
.PageSize
[1]);
848 fh
.Tumble
= htonl(r
->header
.Tumble
);
849 fh
.cupsWidth
= htonl(r
->header
.cupsWidth
);
850 fh
.cupsHeight
= htonl(r
->header
.cupsHeight
);
851 fh
.cupsBitsPerColor
= htonl(r
->header
.cupsBitsPerColor
);
852 fh
.cupsBitsPerPixel
= htonl(r
->header
.cupsBitsPerPixel
);
853 fh
.cupsBytesPerLine
= htonl(r
->header
.cupsBytesPerLine
);
854 fh
.cupsColorOrder
= htonl(r
->header
.cupsColorOrder
);
855 fh
.cupsColorSpace
= htonl(r
->header
.cupsColorSpace
);
856 fh
.cupsNumColors
= htonl(r
->header
.cupsNumColors
);
857 fh
.cupsInteger
[0] = htonl(r
->header
.cupsInteger
[0]);
859 fh
.cupsInteger
[1] = htonl(r
->header
.cupsInteger
[1]);
860 /* CrossFeedTransform */
861 fh
.cupsInteger
[2] = htonl(r
->header
.cupsInteger
[2]);
863 fh
.cupsInteger
[3] = htonl(r
->header
.cupsInteger
[3]);
865 fh
.cupsInteger
[4] = htonl(r
->header
.cupsInteger
[4]);
867 fh
.cupsInteger
[5] = htonl(r
->header
.cupsInteger
[5]);
869 fh
.cupsInteger
[6] = htonl(r
->header
.cupsInteger
[6]);
871 fh
.cupsInteger
[7] = htonl(r
->header
.cupsInteger
[7]);
873 fh
.cupsInteger
[8] = htonl(r
->header
.cupsInteger
[8]);
875 fh
.cupsInteger
[14] = htonl(r
->header
.cupsInteger
[14]);
876 /* VendorIdentifier */
877 fh
.cupsInteger
[15] = htonl(r
->header
.cupsInteger
[15]);
880 void *dst
= fh
.cupsReal
; /* Bypass bogus compiler warning */
881 void *src
= r
->header
.cupsReal
;
882 memcpy(dst
, src
, sizeof(fh
.cupsReal
) + sizeof(fh
.cupsString
));
885 strlcpy(fh
.cupsRenderingIntent
, r
->header
.cupsRenderingIntent
,
886 sizeof(fh
.cupsRenderingIntent
));
887 strlcpy(fh
.cupsPageSizeName
, r
->header
.cupsPageSizeName
,
888 sizeof(fh
.cupsPageSizeName
));
890 return (cups_raster_io(r
, (unsigned char *)&fh
, sizeof(fh
)) == sizeof(fh
));
893 return (cups_raster_io(r
, (unsigned char *)&(r
->header
), sizeof(r
->header
))
894 == sizeof(r
->header
));
899 * 'cupsRasterWriteHeader2()' - Write a raster page header from a version 2
900 * page header structure.
902 * The page header can be initialized using @link cupsRasterInterpretPPD@.
904 * @since CUPS 1.2/OS X 10.5@
907 unsigned /* O - 1 on success, 0 on failure */
908 cupsRasterWriteHeader2(
909 cups_raster_t
*r
, /* I - Raster stream */
910 cups_page_header2_t
*h
) /* I - Raster page header */
912 if (r
== NULL
|| r
->mode
== CUPS_RASTER_READ
)
916 * Make a copy of the header, and compute the number of raster
917 * lines in the page image...
920 memcpy(&(r
->header
), h
, sizeof(cups_page_header2_t
));
922 if (!cups_raster_update(r
))
926 * Write the raster header...
929 if (r
->mode
== CUPS_RASTER_WRITE_PWG
)
932 * PWG raster data is always network byte order with most of the page header
936 cups_page_header2_t fh
; /* File page header */
938 memset(&fh
, 0, sizeof(fh
));
939 strlcpy(fh
.MediaClass
, "PwgRaster", sizeof(fh
.MediaClass
));
940 strlcpy(fh
.MediaColor
, r
->header
.MediaColor
, sizeof(fh
.MediaColor
));
941 strlcpy(fh
.MediaType
, r
->header
.MediaType
, sizeof(fh
.MediaType
));
942 strlcpy(fh
.OutputType
, r
->header
.OutputType
, sizeof(fh
.OutputType
));
943 strlcpy(fh
.cupsRenderingIntent
, r
->header
.cupsRenderingIntent
,
944 sizeof(fh
.cupsRenderingIntent
));
945 strlcpy(fh
.cupsPageSizeName
, r
->header
.cupsPageSizeName
,
946 sizeof(fh
.cupsPageSizeName
));
948 fh
.CutMedia
= htonl(r
->header
.CutMedia
);
949 fh
.Duplex
= htonl(r
->header
.Duplex
);
950 fh
.HWResolution
[0] = htonl(r
->header
.HWResolution
[0]);
951 fh
.HWResolution
[1] = htonl(r
->header
.HWResolution
[1]);
952 fh
.ImagingBoundingBox
[0] = htonl(r
->header
.ImagingBoundingBox
[0]);
953 fh
.ImagingBoundingBox
[1] = htonl(r
->header
.ImagingBoundingBox
[1]);
954 fh
.ImagingBoundingBox
[2] = htonl(r
->header
.ImagingBoundingBox
[2]);
955 fh
.ImagingBoundingBox
[3] = htonl(r
->header
.ImagingBoundingBox
[3]);
956 fh
.InsertSheet
= htonl(r
->header
.InsertSheet
);
957 fh
.Jog
= htonl(r
->header
.Jog
);
958 fh
.LeadingEdge
= htonl(r
->header
.LeadingEdge
);
959 fh
.ManualFeed
= htonl(r
->header
.ManualFeed
);
960 fh
.MediaPosition
= htonl(r
->header
.MediaPosition
);
961 fh
.MediaWeight
= htonl(r
->header
.MediaWeight
);
962 fh
.NumCopies
= htonl(r
->header
.NumCopies
);
963 fh
.Orientation
= htonl(r
->header
.Orientation
);
964 fh
.PageSize
[0] = htonl(r
->header
.PageSize
[0]);
965 fh
.PageSize
[1] = htonl(r
->header
.PageSize
[1]);
966 fh
.Tumble
= htonl(r
->header
.Tumble
);
967 fh
.cupsWidth
= htonl(r
->header
.cupsWidth
);
968 fh
.cupsHeight
= htonl(r
->header
.cupsHeight
);
969 fh
.cupsBitsPerColor
= htonl(r
->header
.cupsBitsPerColor
);
970 fh
.cupsBitsPerPixel
= htonl(r
->header
.cupsBitsPerPixel
);
971 fh
.cupsBytesPerLine
= htonl(r
->header
.cupsBytesPerLine
);
972 fh
.cupsColorOrder
= htonl(r
->header
.cupsColorOrder
);
973 fh
.cupsColorSpace
= htonl(r
->header
.cupsColorSpace
);
974 fh
.cupsNumColors
= htonl(r
->header
.cupsNumColors
);
975 fh
.cupsInteger
[0] = htonl(r
->header
.cupsInteger
[0]);
976 fh
.cupsInteger
[1] = htonl(r
->header
.cupsInteger
[1]);
977 fh
.cupsInteger
[2] = htonl(r
->header
.cupsInteger
[2]);
978 fh
.cupsInteger
[3] = htonl((unsigned)(r
->header
.cupsImagingBBox
[0] * r
->header
.HWResolution
[0] / 72.0));
979 fh
.cupsInteger
[4] = htonl((unsigned)(r
->header
.cupsImagingBBox
[1] * r
->header
.HWResolution
[1] / 72.0));
980 fh
.cupsInteger
[5] = htonl((unsigned)(r
->header
.cupsImagingBBox
[2] * r
->header
.HWResolution
[0] / 72.0));
981 fh
.cupsInteger
[6] = htonl((unsigned)(r
->header
.cupsImagingBBox
[3] * r
->header
.HWResolution
[1] / 72.0));
982 fh
.cupsInteger
[7] = htonl(0xffffff);
984 return (cups_raster_io(r
, (unsigned char *)&fh
, sizeof(fh
)) == sizeof(fh
));
987 return (cups_raster_io(r
, (unsigned char *)&(r
->header
), sizeof(r
->header
))
988 == sizeof(r
->header
));
993 * 'cupsRasterWritePixels()' - Write raster pixels.
995 * For best performance, filters should write one or more whole lines.
996 * The "cupsBytesPerLine" value from the page header can be used to allocate
997 * the line buffer and as the number of bytes to write.
1000 unsigned /* O - Number of bytes written */
1001 cupsRasterWritePixels(cups_raster_t
*r
, /* I - Raster stream */
1002 unsigned char *p
, /* I - Bytes to write */
1003 unsigned len
)/* I - Number of bytes to write */
1005 ssize_t bytes
; /* Bytes read */
1006 unsigned remaining
; /* Bytes remaining */
1009 DEBUG_printf(("cupsRasterWritePixels(r=%p, p=%p, len=%u), remaining=%u\n",
1010 r
, p
, len
, r
->remaining
));
1012 if (r
== NULL
|| r
->mode
== CUPS_RASTER_READ
|| r
->remaining
== 0)
1018 * Without compression, just write the raster data raw unless the data needs
1022 r
->remaining
-= len
/ r
->header
.cupsBytesPerLine
;
1025 (r
->header
.cupsBitsPerColor
== 16 ||
1026 r
->header
.cupsBitsPerPixel
== 12 ||
1027 r
->header
.cupsBitsPerPixel
== 16))
1029 unsigned char *bufptr
; /* Pointer into write buffer */
1030 unsigned count
; /* Remaining count */
1033 * Allocate a write buffer as needed...
1036 if ((size_t)len
> r
->bufsize
)
1039 bufptr
= realloc(r
->buffer
, len
);
1041 bufptr
= malloc(len
);
1051 * Byte swap the pixels...
1054 for (bufptr
= r
->buffer
, count
= len
; count
> 1; count
-= 2, bufptr
+= 2)
1060 if (count
) /* This should never happen... */
1064 * Write the byte-swapped buffer...
1067 bytes
= cups_raster_io(r
, r
->buffer
, len
);
1070 bytes
= cups_raster_io(r
, p
, len
);
1079 * Otherwise, compress each line...
1082 for (remaining
= len
; remaining
> 0; remaining
-= (unsigned)bytes
, p
+= bytes
)
1085 * Figure out the number of remaining bytes on the current line...
1088 if ((bytes
= (ssize_t
)remaining
) > (ssize_t
)(r
->pend
- r
->pcurrent
))
1089 bytes
= (ssize_t
)(r
->pend
- r
->pcurrent
);
1094 * Check to see if this line is the same as the previous line...
1097 if (memcmp(p
, r
->pcurrent
, (size_t)bytes
))
1099 if (cups_raster_write(r
, r
->pixels
) <= 0)
1107 * Mark more bytes as the same...
1110 r
->pcurrent
+= bytes
;
1112 if (r
->pcurrent
>= r
->pend
)
1115 * Increase the repeat count...
1119 r
->pcurrent
= r
->pixels
;
1122 * Flush out this line if it is the last one...
1127 if (r
->remaining
== 0)
1129 if (cups_raster_write(r
, r
->pixels
) <= 0)
1134 else if (r
->count
== 256)
1136 if (cups_raster_write(r
, r
->pixels
) <= 0)
1150 * Copy the raster data to the buffer...
1153 memcpy(r
->pcurrent
, p
, (size_t)bytes
);
1155 r
->pcurrent
+= bytes
;
1157 if (r
->pcurrent
>= r
->pend
)
1160 * Increase the repeat count...
1164 r
->pcurrent
= r
->pixels
;
1167 * Flush out this line if it is the last one...
1172 if (r
->remaining
== 0)
1174 if (cups_raster_write(r
, r
->pixels
) <= 0)
1186 * 'cups_raster_read_header()' - Read a raster page header.
1189 static unsigned /* O - 1 on success, 0 on fail */
1190 cups_raster_read_header(
1191 cups_raster_t
*r
) /* I - Raster stream */
1193 size_t len
; /* Length for read/swap */
1196 DEBUG_printf(("3cups_raster_read_header(r=%p), r->mode=%d", r
, r
? r
->mode
: 0));
1198 if (r
== NULL
|| r
->mode
!= CUPS_RASTER_READ
)
1201 DEBUG_printf(("4cups_raster_read_header: r->iocount=" CUPS_LLFMT
, CUPS_LLCAST r
->iocount
));
1204 * Get the length of the raster header...
1207 if (r
->sync
== CUPS_RASTER_SYNCv1
|| r
->sync
== CUPS_RASTER_REVSYNCv1
)
1208 len
= sizeof(cups_page_header_t
);
1210 len
= sizeof(cups_page_header2_t
);
1212 DEBUG_printf(("4cups_raster_read_header: len=%d", (int)len
));
1215 * Read the header...
1218 memset(&(r
->header
), 0, sizeof(r
->header
));
1220 if (cups_raster_read(r
, (unsigned char *)&(r
->header
), len
) < (ssize_t
)len
)
1222 DEBUG_printf(("4cups_raster_read_header: EOF, r->iocount=" CUPS_LLFMT
, CUPS_LLCAST r
->iocount
));
1227 * Swap bytes as needed...
1232 unsigned *s
, /* Current word */
1233 temp
; /* Temporary copy */
1236 DEBUG_puts("4cups_raster_read_header: Swapping header bytes.");
1238 for (len
= 81, s
= &(r
->header
.AdvanceDistance
);
1243 *s
= ((temp
& 0xff) << 24) |
1244 ((temp
& 0xff00) << 8) |
1245 ((temp
& 0xff0000) >> 8) |
1246 ((temp
& 0xff000000) >> 24);
1248 DEBUG_printf(("4cups_raster_read_header: %08x => %08x", temp
, *s
));
1253 * Update the header and row count...
1256 if (!cups_raster_update(r
))
1259 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
));
1261 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);
1266 * 'cups_raster_io()' - Read/write bytes from a context, handling interruptions.
1269 static ssize_t
/* O - Bytes read/write or -1 */
1270 cups_raster_io(cups_raster_t
*r
, /* I - Raster stream */
1271 unsigned char *buf
, /* I - Buffer for read/write */
1272 size_t bytes
) /* I - Number of bytes to read/write */
1274 ssize_t count
, /* Number of bytes read/written */
1275 total
; /* Total bytes read/written */
1278 DEBUG_printf(("5cups_raster_io(r=%p, buf=%p, bytes=" CUPS_LLFMT
")", r
, buf
, CUPS_LLCAST bytes
));
1280 for (total
= 0; total
< (ssize_t
)bytes
; total
+= count
, buf
+= count
)
1282 count
= (*r
->iocb
)(r
->ctx
, buf
, bytes
- (size_t)total
);
1284 DEBUG_printf(("6cups_raster_io: count=%d, total=%d", (int)count
, (int)total
));
1287 DEBUG_puts("6cups_raster_io: Returning 0.");
1292 DEBUG_puts("6cups_raster_io: Returning -1 on error.");
1297 r
->iocount
+= (size_t)count
;
1301 DEBUG_printf(("6cups_raster_io: Returning " CUPS_LLFMT
".", CUPS_LLCAST total
));
1308 * 'cups_raster_read()' - Read through the raster buffer.
1311 static ssize_t
/* O - Number of bytes read */
1312 cups_raster_read(cups_raster_t
*r
, /* I - Raster stream */
1313 unsigned char *buf
, /* I - Buffer */
1314 size_t bytes
) /* I - Number of bytes to read */
1316 ssize_t count
, /* Number of bytes read */
1317 remaining
, /* Remaining bytes in buffer */
1318 total
; /* Total bytes read */
1321 DEBUG_printf(("5cups_raster_read(r=%p, buf=%p, bytes=" CUPS_LLFMT
")\n", r
, buf
, CUPS_LLCAST bytes
));
1324 return (cups_raster_io(r
, buf
, bytes
));
1327 * Allocate a read buffer as needed...
1330 count
= (ssize_t
)(2 * r
->header
.cupsBytesPerLine
);
1334 if ((size_t)count
> r
->bufsize
)
1336 ssize_t offset
= r
->bufptr
- r
->buffer
;
1337 /* Offset to current start of buffer */
1338 ssize_t end
= r
->bufend
- r
->buffer
;/* Offset to current end of buffer */
1339 unsigned char *rptr
; /* Pointer in read buffer */
1342 rptr
= realloc(r
->buffer
, (size_t)count
);
1344 rptr
= malloc((size_t)count
);
1350 r
->bufptr
= rptr
+ offset
;
1351 r
->bufend
= rptr
+ end
;
1352 r
->bufsize
= (size_t)count
;
1356 * Loop until we have read everything...
1359 for (total
= 0, remaining
= (int)(r
->bufend
- r
->bufptr
);
1360 total
< (ssize_t
)bytes
;
1361 total
+= count
, buf
+= count
)
1363 count
= (ssize_t
)bytes
- total
;
1365 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
));
1372 * Read into the raster buffer and then copy...
1375 remaining
= (*r
->iocb
)(r
->ctx
, r
->buffer
, r
->bufsize
);
1379 r
->bufptr
= r
->buffer
;
1380 r
->bufend
= r
->buffer
+ remaining
;
1383 r
->iocount
+= (size_t)remaining
;
1389 * Read directly into "buf"...
1392 count
= (*r
->iocb
)(r
->ctx
, buf
, (size_t)count
);
1398 r
->iocount
+= (size_t)count
;
1406 * Copy bytes from raster buffer to "buf"...
1409 if (count
> remaining
)
1418 *buf
= *(r
->bufptr
)++;
1421 else if (count
< 128)
1424 * Copy up to 127 bytes without using memcpy(); this is
1425 * faster because it avoids an extra function call and is
1426 * often further optimized by the compiler...
1429 unsigned char *bufptr
; /* Temporary buffer pointer */
1433 for (bufptr
= r
->bufptr
; count
> 0; count
--, total
++)
1441 * Use memcpy() for a large read...
1444 memcpy(buf
, r
->bufptr
, (size_t)count
);
1450 DEBUG_printf(("6cups_raster_read: Returning %ld", (long)total
));
1457 * 'cups_raster_update()' - Update the raster header and row count for the
1461 static int /* O - 1 on success, 0 on failure */
1462 cups_raster_update(cups_raster_t
*r
) /* I - Raster stream */
1464 if (r
->sync
== CUPS_RASTER_SYNCv1
|| r
->sync
== CUPS_RASTER_REVSYNCv1
||
1465 r
->header
.cupsNumColors
== 0)
1468 * Set the "cupsNumColors" field according to the colorspace...
1471 switch (r
->header
.cupsColorSpace
)
1473 case CUPS_CSPACE_W
:
1474 case CUPS_CSPACE_K
:
1475 case CUPS_CSPACE_WHITE
:
1476 case CUPS_CSPACE_GOLD
:
1477 case CUPS_CSPACE_SILVER
:
1478 case CUPS_CSPACE_SW
:
1479 r
->header
.cupsNumColors
= 1;
1482 case CUPS_CSPACE_RGB
:
1483 case CUPS_CSPACE_CMY
:
1484 case CUPS_CSPACE_YMC
:
1485 case CUPS_CSPACE_CIEXYZ
:
1486 case CUPS_CSPACE_CIELab
:
1487 case CUPS_CSPACE_SRGB
:
1488 case CUPS_CSPACE_ADOBERGB
:
1489 case CUPS_CSPACE_ICC1
:
1490 case CUPS_CSPACE_ICC2
:
1491 case CUPS_CSPACE_ICC3
:
1492 case CUPS_CSPACE_ICC4
:
1493 case CUPS_CSPACE_ICC5
:
1494 case CUPS_CSPACE_ICC6
:
1495 case CUPS_CSPACE_ICC7
:
1496 case CUPS_CSPACE_ICC8
:
1497 case CUPS_CSPACE_ICC9
:
1498 case CUPS_CSPACE_ICCA
:
1499 case CUPS_CSPACE_ICCB
:
1500 case CUPS_CSPACE_ICCC
:
1501 case CUPS_CSPACE_ICCD
:
1502 case CUPS_CSPACE_ICCE
:
1503 case CUPS_CSPACE_ICCF
:
1504 r
->header
.cupsNumColors
= 3;
1507 case CUPS_CSPACE_RGBA
:
1508 case CUPS_CSPACE_RGBW
:
1509 case CUPS_CSPACE_CMYK
:
1510 case CUPS_CSPACE_YMCK
:
1511 case CUPS_CSPACE_KCMY
:
1512 case CUPS_CSPACE_GMCK
:
1513 case CUPS_CSPACE_GMCS
:
1514 r
->header
.cupsNumColors
= 4;
1517 case CUPS_CSPACE_KCMYcm
:
1518 if (r
->header
.cupsBitsPerPixel
< 8)
1519 r
->header
.cupsNumColors
= 6;
1521 r
->header
.cupsNumColors
= 4;
1524 case CUPS_CSPACE_DEVICE1
:
1525 case CUPS_CSPACE_DEVICE2
:
1526 case CUPS_CSPACE_DEVICE3
:
1527 case CUPS_CSPACE_DEVICE4
:
1528 case CUPS_CSPACE_DEVICE5
:
1529 case CUPS_CSPACE_DEVICE6
:
1530 case CUPS_CSPACE_DEVICE7
:
1531 case CUPS_CSPACE_DEVICE8
:
1532 case CUPS_CSPACE_DEVICE9
:
1533 case CUPS_CSPACE_DEVICEA
:
1534 case CUPS_CSPACE_DEVICEB
:
1535 case CUPS_CSPACE_DEVICEC
:
1536 case CUPS_CSPACE_DEVICED
:
1537 case CUPS_CSPACE_DEVICEE
:
1538 case CUPS_CSPACE_DEVICEF
:
1539 r
->header
.cupsNumColors
= r
->header
.cupsColorSpace
-
1540 CUPS_CSPACE_DEVICE1
+ 1;
1544 /* Unknown color space */
1550 * Set the number of bytes per pixel/color...
1553 if (r
->header
.cupsColorOrder
== CUPS_ORDER_CHUNKED
)
1554 r
->bpp
= (r
->header
.cupsBitsPerPixel
+ 7) / 8;
1556 r
->bpp
= (r
->header
.cupsBitsPerColor
+ 7) / 8;
1562 * Set the number of remaining rows...
1565 if (r
->header
.cupsColorOrder
== CUPS_ORDER_PLANAR
)
1566 r
->remaining
= r
->header
.cupsHeight
* r
->header
.cupsNumColors
;
1568 r
->remaining
= r
->header
.cupsHeight
;
1571 * Allocate the compression buffer...
1576 if (r
->pixels
!= NULL
)
1579 if ((r
->pixels
= calloc(r
->header
.cupsBytesPerLine
, 1)) == NULL
)
1588 r
->pcurrent
= r
->pixels
;
1589 r
->pend
= r
->pixels
+ r
->header
.cupsBytesPerLine
;
1598 * 'cups_raster_write()' - Write a row of compressed raster data...
1601 static ssize_t
/* O - Number of bytes written */
1603 cups_raster_t
*r
, /* I - Raster stream */
1604 const unsigned char *pixels
) /* I - Pixel data to write */
1606 const unsigned char *start
, /* Start of sequence */
1607 *ptr
, /* Current pointer in sequence */
1608 *pend
, /* End of raster buffer */
1609 *plast
; /* Pointer to last pixel */
1610 unsigned char *wptr
; /* Pointer into write buffer */
1611 unsigned bpp
, /* Bytes per pixel */
1615 DEBUG_printf(("3cups_raster_write(r=%p, pixels=%p)\n", r
, pixels
));
1618 * Allocate a write buffer as needed...
1621 count
= r
->header
.cupsBytesPerLine
* 2;
1625 if ((size_t)count
> r
->bufsize
)
1628 wptr
= realloc(r
->buffer
, count
);
1630 wptr
= malloc(count
);
1634 DEBUG_printf(("4cups_raster_write: Unable to allocate " CUPS_LLFMT
" bytes for raster buffer: %s", CUPS_LLCAST count
, strerror(errno
)));
1643 * Write the row repeat count...
1647 pend
= pixels
+ r
->header
.cupsBytesPerLine
;
1650 *wptr
++ = (unsigned char)(r
->count
- 1);
1653 * Write using a modified PackBits compression...
1656 for (ptr
= pixels
; ptr
< pend
;)
1664 * Encode a single pixel at the end...
1668 for (count
= bpp
; count
> 0; count
--)
1671 else if (!memcmp(start
, ptr
, bpp
))
1674 * Encode a sequence of repeating pixels...
1677 for (count
= 2; count
< 128 && ptr
< plast
; count
++, ptr
+= bpp
)
1678 if (memcmp(ptr
, ptr
+ bpp
, bpp
))
1681 *wptr
++ = (unsigned char)(count
- 1);
1682 for (count
= bpp
; count
> 0; count
--)
1688 * Encode a sequence of non-repeating pixels...
1691 for (count
= 1; count
< 128 && ptr
< plast
; count
++, ptr
+= bpp
)
1692 if (!memcmp(ptr
, ptr
+ bpp
, bpp
))
1695 if (ptr
>= plast
&& count
< 128)
1701 *wptr
++ = (unsigned char)(257 - count
);
1704 memcpy(wptr
, start
, count
);
1709 DEBUG_printf(("4cups_raster_write: Writing " CUPS_LLFMT
" bytes.", CUPS_LLCAST (wptr
- r
->buffer
)));
1711 return (cups_raster_io(r
, r
->buffer
, (size_t)(wptr
- r
->buffer
)));
1716 * 'cups_read_fd()' - Read bytes from a file.
1719 static ssize_t
/* O - Bytes read or -1 */
1720 cups_read_fd(void *ctx
, /* I - File descriptor as pointer */
1721 unsigned char *buf
, /* I - Buffer for read */
1722 size_t bytes
) /* I - Maximum number of bytes to read */
1724 int fd
= (int)((intptr_t)ctx
);
1725 /* File descriptor */
1726 ssize_t count
; /* Number of bytes read */
1729 #ifdef WIN32 /* Sigh */
1730 while ((count
= read(fd
, buf
, (unsigned)bytes
)) < 0)
1732 while ((count
= read(fd
, buf
, bytes
)) < 0)
1734 if (errno
!= EINTR
&& errno
!= EAGAIN
)
1736 DEBUG_printf(("4cups_read_fd: %s", strerror(errno
)));
1740 DEBUG_printf(("4cups_read_fd: Returning %d bytes.", (int)count
));
1747 * 'cups_swap()' - Swap bytes in raster data...
1751 cups_swap(unsigned char *buf
, /* I - Buffer to swap */
1752 size_t bytes
) /* I - Number of bytes to swap */
1754 unsigned char even
, odd
; /* Temporary variables */
1773 * 'cups_write_fd()' - Write bytes to a file.
1776 static ssize_t
/* O - Bytes written or -1 */
1777 cups_write_fd(void *ctx
, /* I - File descriptor pointer */
1778 unsigned char *buf
, /* I - Bytes to write */
1779 size_t bytes
) /* I - Number of bytes to write */
1781 int fd
= (int)((intptr_t)ctx
);
1782 /* File descriptor */
1783 ssize_t count
; /* Number of bytes written */
1786 #ifdef WIN32 /* Sigh */
1787 while ((count
= write(fd
, buf
, (unsigned)bytes
)) < 0)
1789 while ((count
= write(fd
, buf
, bytes
)) < 0)
1791 if (errno
!= EINTR
&& errno
!= EAGAIN
)
1793 DEBUG_printf(("4cups_write_fd: %s", strerror(errno
)));