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CUPS-for-Android/filter/raster.c
Noha Elarief 130bd3bb59 Upgrading to CUPS 2.2.1
2017-02-03 13:21:52 -08:00

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/*
* Raster file routines for CUPS.
*
* Copyright 2007-2016 by Apple Inc.
* Copyright 1997-2006 by Easy Software Products.
*
* This file is part of the CUPS Imaging library.
*
* These coded instructions, statements, and computer programs are the
* property of Apple Inc. and are protected by Federal copyright
* law. Distribution and use rights are outlined in the file "LICENSE.txt"
* which should have been included with this file. If this file is
* file is missing or damaged, see the license at "http://www.cups.org/".
*
* This file is subject to the Apple OS-Developed Software exception.
*/
/*
* Include necessary headers...
*/
#include <cups/raster-private.h>
#ifdef HAVE_STDINT_H
# include <stdint.h>
#endif /* HAVE_STDINT_H */
/*
* Private structures...
*/
struct _cups_raster_s /**** Raster stream data ****/
{
unsigned sync; /* Sync word from start of stream */
void *ctx; /* File descriptor */
cups_raster_iocb_t iocb; /* IO callback */
cups_mode_t mode; /* Read/write mode */
cups_page_header2_t header; /* Raster header for current page */
unsigned count, /* Current row run-length count */
remaining, /* Remaining rows in page image */
bpp; /* Bytes per pixel/color */
unsigned char *pixels, /* Pixels for current row */
*pend, /* End of pixel buffer */
*pcurrent; /* Current byte in pixel buffer */
int compressed, /* Non-zero if data is compressed */
swapped; /* Non-zero if data is byte-swapped */
unsigned char *buffer, /* Read/write buffer */
*bufptr, /* Current (read) position in buffer */
*bufend; /* End of current (read) buffer */
size_t bufsize; /* Buffer size */
#ifdef DEBUG
size_t iocount; /* Number of bytes read/written */
#endif /* DEBUG */
};
/*
* Local functions...
*/
static ssize_t cups_raster_io(cups_raster_t *r, unsigned char *buf, size_t bytes);
static unsigned cups_raster_read_header(cups_raster_t *r);
static ssize_t cups_raster_read(cups_raster_t *r, unsigned char *buf,
size_t bytes);
static int cups_raster_update(cups_raster_t *r);
static ssize_t cups_raster_write(cups_raster_t *r,
const unsigned char *pixels);
static ssize_t cups_read_fd(void *ctx, unsigned char *buf, size_t bytes);
static void cups_swap(unsigned char *buf, size_t bytes);
static ssize_t cups_write_fd(void *ctx, unsigned char *buf, size_t bytes);
/*
* 'cupsRasterClose()' - Close a raster stream.
*
* The file descriptor associated with the raster stream must be closed
* separately as needed.
*/
void
cupsRasterClose(cups_raster_t *r) /* I - Stream to close */
{
if (r != NULL)
{
if (r->buffer)
free(r->buffer);
if (r->pixels)
free(r->pixels);
free(r);
}
}
/*
* 'cupsRasterInitPWGHeader()' - Initialize a page header for PWG Raster output.
*
* The "media" argument specifies the media to use.
*
* The "type" argument specifies a "pwg-raster-document-type-supported" value
* that controls the color space and bit depth of the raster data.
*
* The "xres" and "yres" arguments specify the raster resolution in dots per
* inch.
*
* The "sheet_back" argument specifies a "pwg-raster-document-sheet-back" value
* to apply for the back side of a page. Pass @code NULL@ for the front side.
*
* @since CUPS 2.2/macOS 10.12@
*/
int /* O - 1 on success, 0 on failure */
cupsRasterInitPWGHeader(
cups_page_header2_t *h, /* I - Page header */
pwg_media_t *media, /* I - PWG media information */
const char *type, /* I - PWG raster type string */
int xdpi, /* I - Cross-feed direction (horizontal) resolution */
int ydpi, /* I - Feed direction (vertical) resolution */
const char *sides, /* I - IPP "sides" option value */
const char *sheet_back) /* I - Transform for back side or @code NULL@ for none */
{
if (!h || !media || !type || xdpi <= 0 || ydpi <= 0)
{
_cupsRasterAddError("%s", strerror(EINVAL));
return (0);
}
/*
* Initialize the page header...
*/
memset(h, 0, sizeof(cups_page_header2_t));
strlcpy(h->cupsPageSizeName, media->pwg, sizeof(h->cupsPageSizeName));
h->PageSize[0] = (unsigned)(72 * media->width / 2540);
h->PageSize[1] = (unsigned)(72 * media->length / 2540);
/* This never gets written but is needed for some applications */
h->cupsPageSize[0] = 72.0f * media->width / 2540.0f;
h->cupsPageSize[1] = 72.0f * media->length / 2540.0f;
h->ImagingBoundingBox[2] = h->PageSize[0];
h->ImagingBoundingBox[3] = h->PageSize[1];
h->HWResolution[0] = (unsigned)xdpi;
h->HWResolution[1] = (unsigned)ydpi;
h->cupsWidth = (unsigned)(media->width * xdpi / 2540);
h->cupsHeight = (unsigned)(media->length * ydpi / 2540);
if (h->cupsWidth > 0x00ffffff || h->cupsHeight > 0x00ffffff)
{
_cupsRasterAddError("Raster dimensions too large.");
return (0);
}
h->cupsInteger[CUPS_RASTER_PWG_ImageBoxRight] = h->cupsWidth;
h->cupsInteger[CUPS_RASTER_PWG_ImageBoxBottom] = h->cupsHeight;
/*
* Colorspace and bytes per line...
*/
if (!strcmp(type, "adobe-rgb_8"))
{
h->cupsBitsPerColor = 8;
h->cupsBitsPerPixel = 24;
h->cupsColorSpace = CUPS_CSPACE_ADOBERGB;
}
else if (!strcmp(type, "adobe-rgb_16"))
{
h->cupsBitsPerColor = 16;
h->cupsBitsPerPixel = 48;
h->cupsColorSpace = CUPS_CSPACE_ADOBERGB;
}
else if (!strcmp(type, "black_1"))
{
h->cupsBitsPerColor = 1;
h->cupsBitsPerPixel = 1;
h->cupsColorSpace = CUPS_CSPACE_K;
}
else if (!strcmp(type, "black_8"))
{
h->cupsBitsPerColor = 8;
h->cupsBitsPerPixel = 8;
h->cupsColorSpace = CUPS_CSPACE_K;
}
else if (!strcmp(type, "black_16"))
{
h->cupsBitsPerColor = 16;
h->cupsBitsPerPixel = 16;
h->cupsColorSpace = CUPS_CSPACE_K;
}
else if (!strcmp(type, "cmyk_8"))
{
h->cupsBitsPerColor = 8;
h->cupsBitsPerPixel = 32;
h->cupsColorSpace = CUPS_CSPACE_CMYK;
}
else if (!strcmp(type, "cmyk_16"))
{
h->cupsBitsPerColor = 16;
h->cupsBitsPerPixel = 64;
h->cupsColorSpace = CUPS_CSPACE_CMYK;
}
else if (!strncmp(type, "device", 6) && type[6] >= '1' && type[6] <= '9')
{
int ncolors, bits; /* Number of colors and bits */
if (sscanf(type, "device%d_%d", &ncolors, &bits) != 2 || ncolors > 15 || (bits != 8 && bits != 16))
{
_cupsRasterAddError("Unsupported raster type \'%s\'.", type);
return (0);
}
h->cupsBitsPerColor = (unsigned)bits;
h->cupsBitsPerPixel = (unsigned)(ncolors * bits);
h->cupsColorSpace = (cups_cspace_t)(CUPS_CSPACE_DEVICE1 + ncolors - 1);
}
else if (!strcmp(type, "rgb_8"))
{
h->cupsBitsPerColor = 8;
h->cupsBitsPerPixel = 24;
h->cupsColorSpace = CUPS_CSPACE_RGB;
}
else if (!strcmp(type, "rgb_16"))
{
h->cupsBitsPerColor = 16;
h->cupsBitsPerPixel = 48;
h->cupsColorSpace = CUPS_CSPACE_RGB;
}
else if (!strcmp(type, "sgray_1"))
{
h->cupsBitsPerColor = 1;
h->cupsBitsPerPixel = 1;
h->cupsColorSpace = CUPS_CSPACE_SW;
}
else if (!strcmp(type, "sgray_8"))
{
h->cupsBitsPerColor = 8;
h->cupsBitsPerPixel = 8;
h->cupsColorSpace = CUPS_CSPACE_SW;
}
else if (!strcmp(type, "sgray_16"))
{
h->cupsBitsPerColor = 16;
h->cupsBitsPerPixel = 16;
h->cupsColorSpace = CUPS_CSPACE_SW;
}
else if (!strcmp(type, "srgb_8"))
{
h->cupsBitsPerColor = 8;
h->cupsBitsPerPixel = 24;
h->cupsColorSpace = CUPS_CSPACE_SRGB;
}
else if (!strcmp(type, "srgb_16"))
{
h->cupsBitsPerColor = 16;
h->cupsBitsPerPixel = 48;
h->cupsColorSpace = CUPS_CSPACE_SRGB;
}
else
{
_cupsRasterAddError("Unsupported raster type \'%s\'.", type);
return (0);
}
h->cupsColorOrder = CUPS_ORDER_CHUNKED;
h->cupsNumColors = h->cupsBitsPerPixel / h->cupsBitsPerColor;
h->cupsBytesPerLine = (h->cupsWidth * h->cupsBitsPerPixel + 7) / 8;
/*
* Duplex support...
*/
h->cupsInteger[CUPS_RASTER_PWG_CrossFeedTransform] = 1;
h->cupsInteger[CUPS_RASTER_PWG_FeedTransform] = 1;
if (sides)
{
if (!strcmp(sides, "two-sided-long-edge"))
{
h->Duplex = 1;
}
else if (!strcmp(sides, "two-sided-short-edge"))
{
h->Duplex = 1;
h->Tumble = 1;
}
else if (strcmp(sides, "one-sided"))
{
_cupsRasterAddError("Unsupported sides value \'%s\'.", sides);
return (0);
}
if (sheet_back)
{
if (!strcmp(sheet_back, "flipped"))
{
if (h->Tumble)
h->cupsInteger[CUPS_RASTER_PWG_CrossFeedTransform] = 0xffffffffU;
else
h->cupsInteger[CUPS_RASTER_PWG_FeedTransform] = 0xffffffffU;
}
else if (!strcmp(sheet_back, "manual-tumble"))
{
if (h->Tumble)
{
h->cupsInteger[CUPS_RASTER_PWG_CrossFeedTransform] = 0xffffffffU;
h->cupsInteger[CUPS_RASTER_PWG_FeedTransform] = 0xffffffffU;
}
}
else if (!strcmp(sheet_back, "rotated"))
{
if (!h->Tumble)
{
h->cupsInteger[CUPS_RASTER_PWG_CrossFeedTransform] = 0xffffffffU;
h->cupsInteger[CUPS_RASTER_PWG_FeedTransform] = 0xffffffffU;
}
}
else if (strcmp(sheet_back, "normal"))
{
_cupsRasterAddError("Unsupported sheet_back value \'%s\'.", sheet_back);
return (0);
}
}
}
return (1);
}
/*
* 'cupsRasterOpen()' - Open a raster stream using a file descriptor.
*
* This function associates a raster stream with the given file descriptor.
* For most printer driver filters, "fd" will be 0 (stdin). For most raster
* image processor (RIP) filters that generate raster data, "fd" will be 1
* (stdout).
*
* When writing raster data, the @code CUPS_RASTER_WRITE@,
* @code CUPS_RASTER_WRITE_COMPRESS@, or @code CUPS_RASTER_WRITE_PWG@ mode can
* be used - compressed and PWG output is generally 25-50% smaller but adds a
* 100-300% execution time overhead.
*/
cups_raster_t * /* O - New stream */
cupsRasterOpen(int fd, /* I - File descriptor */
cups_mode_t mode) /* I - Mode - @code CUPS_RASTER_READ@,
@code CUPS_RASTER_WRITE@,
@code CUPS_RASTER_WRITE_COMPRESSED@,
or @code CUPS_RASTER_WRITE_PWG@ */
{
if (mode == CUPS_RASTER_READ)
return (cupsRasterOpenIO(cups_read_fd, (void *)((intptr_t)fd), mode));
else
return (cupsRasterOpenIO(cups_write_fd, (void *)((intptr_t)fd), mode));
}
/*
* 'cupsRasterOpenIO()' - Open a raster stream using a callback function.
*
* This function associates a raster stream with the given callback function and
* context pointer.
*
* When writing raster data, the @code CUPS_RASTER_WRITE@,
* @code CUPS_RASTER_WRITE_COMPRESS@, or @code CUPS_RASTER_WRITE_PWG@ mode can
* be used - compressed and PWG output is generally 25-50% smaller but adds a
* 100-300% execution time overhead.
*/
cups_raster_t * /* O - New stream */
cupsRasterOpenIO(
cups_raster_iocb_t iocb, /* I - Read/write callback */
void *ctx, /* I - Context pointer for callback */
cups_mode_t mode) /* I - Mode - @code CUPS_RASTER_READ@,
@code CUPS_RASTER_WRITE@,
@code CUPS_RASTER_WRITE_COMPRESSED@,
or @code CUPS_RASTER_WRITE_PWG@ */
{
cups_raster_t *r; /* New stream */
_cupsRasterClearError();
if ((r = calloc(sizeof(cups_raster_t), 1)) == NULL)
{
_cupsRasterAddError("Unable to allocate memory for raster stream: %s\n",
strerror(errno));
return (NULL);
}
r->ctx = ctx;
r->iocb = iocb;
r->mode = mode;
if (mode == CUPS_RASTER_READ)
{
/*
* Open for read - get sync word...
*/
if (cups_raster_io(r, (unsigned char *)&(r->sync), sizeof(r->sync)) !=
sizeof(r->sync))
{
_cupsRasterAddError("Unable to read header from raster stream: %s\n",
strerror(errno));
free(r);
return (NULL);
}
if (r->sync != CUPS_RASTER_SYNC &&
r->sync != CUPS_RASTER_REVSYNC &&
r->sync != CUPS_RASTER_SYNCv1 &&
r->sync != CUPS_RASTER_REVSYNCv1 &&
r->sync != CUPS_RASTER_SYNCv2 &&
r->sync != CUPS_RASTER_REVSYNCv2)
{
_cupsRasterAddError("Unknown raster format %08x!\n", r->sync);
free(r);
return (NULL);
}
if (r->sync == CUPS_RASTER_SYNCv2 ||
r->sync == CUPS_RASTER_REVSYNCv2)
r->compressed = 1;
if (r->sync == CUPS_RASTER_REVSYNC ||
r->sync == CUPS_RASTER_REVSYNCv1 ||
r->sync == CUPS_RASTER_REVSYNCv2)
r->swapped = 1;
DEBUG_printf(("1cupsRasterOpenIO: r->swapped=%d, r->sync=%08x\n", r->swapped, r->sync));
}
else
{
/*
* Open for write - put sync word...
*/
switch (mode)
{
default :
case CUPS_RASTER_WRITE :
r->sync = CUPS_RASTER_SYNC;
break;
case CUPS_RASTER_WRITE_COMPRESSED :
r->compressed = 1;
r->sync = CUPS_RASTER_SYNCv2;
break;
case CUPS_RASTER_WRITE_PWG :
r->compressed = 1;
r->sync = htonl(CUPS_RASTER_SYNC_PWG);
r->swapped = r->sync != CUPS_RASTER_SYNC_PWG;
break;
}
if (cups_raster_io(r, (unsigned char *)&(r->sync), sizeof(r->sync)) < (ssize_t)sizeof(r->sync))
{
_cupsRasterAddError("Unable to write raster stream header: %s\n",
strerror(errno));
free(r);
return (NULL);
}
}
return (r);
}
/*
* 'cupsRasterReadHeader()' - Read a raster page header and store it in a
* version 1 page header structure.
*
* This function is deprecated. Use @link cupsRasterReadHeader2@ instead.
*
* Version 1 page headers were used in CUPS 1.0 and 1.1 and contain a subset
* of the version 2 page header data. This function handles reading version 2
* page headers and copying only the version 1 data into the provided buffer.
*
* @deprecated@
*/
unsigned /* O - 1 on success, 0 on failure/end-of-file */
cupsRasterReadHeader(
cups_raster_t *r, /* I - Raster stream */
cups_page_header_t *h) /* I - Pointer to header data */
{
/*
* Get the raster header...
*/
if (!cups_raster_read_header(r))
{
memset(h, 0, sizeof(cups_page_header_t));
return (0);
}
/*
* Copy the header to the user-supplied buffer...
*/
memcpy(h, &(r->header), sizeof(cups_page_header_t));
return (1);
}
/*
* 'cupsRasterReadHeader2()' - Read a raster page header and store it in a
* version 2 page header structure.
*
* @since CUPS 1.2/macOS 10.5@
*/
unsigned /* O - 1 on success, 0 on failure/end-of-file */
cupsRasterReadHeader2(
cups_raster_t *r, /* I - Raster stream */
cups_page_header2_t *h) /* I - Pointer to header data */
{
/*
* Get the raster header...
*/
DEBUG_printf(("cupsRasterReadHeader2(r=%p, h=%p)", (void *)r, (void *)h));
if (!cups_raster_read_header(r))
{
memset(h, 0, sizeof(cups_page_header2_t));
return (0);
}
/*
* Copy the header to the user-supplied buffer...
*/
memcpy(h, &(r->header), sizeof(cups_page_header2_t));
return (1);
}
/*
* 'cupsRasterReadPixels()' - Read raster pixels.
*
* For best performance, filters should read one or more whole lines.
* The "cupsBytesPerLine" value from the page header can be used to allocate
* the line buffer and as the number of bytes to read.
*/
unsigned /* O - Number of bytes read */
cupsRasterReadPixels(cups_raster_t *r, /* I - Raster stream */
unsigned char *p, /* I - Pointer to pixel buffer */
unsigned len) /* I - Number of bytes to read */
{
ssize_t bytes; /* Bytes read */
unsigned cupsBytesPerLine; /* cupsBytesPerLine value */
unsigned remaining; /* Bytes remaining */
unsigned char *ptr, /* Pointer to read buffer */
byte, /* Byte from file */
*temp; /* Pointer into buffer */
unsigned count; /* Repetition count */
DEBUG_printf(("cupsRasterReadPixels(r=%p, p=%p, len=%u)", (void *)r, (void *)p, len));
if (r == NULL || r->mode != CUPS_RASTER_READ || r->remaining == 0 ||
r->header.cupsBytesPerLine == 0)
{
DEBUG_puts("1cupsRasterReadPixels: Returning 0.");
return (0);
}
DEBUG_printf(("1cupsRasterReadPixels: compressed=%d, remaining=%u", r->compressed, r->remaining));
if (!r->compressed)
{
/*
* Read without compression...
*/
r->remaining -= len / r->header.cupsBytesPerLine;
if (cups_raster_io(r, p, len) < (ssize_t)len)
{
DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
return (0);
}
/*
* Swap bytes as needed...
*/
if (r->swapped &&
(r->header.cupsBitsPerColor == 16 ||
r->header.cupsBitsPerPixel == 12 ||
r->header.cupsBitsPerPixel == 16))
cups_swap(p, len);
/*
* Return...
*/
DEBUG_printf(("1cupsRasterReadPixels: Returning %u", len));
return (len);
}
/*
* Read compressed data...
*/
remaining = len;
cupsBytesPerLine = r->header.cupsBytesPerLine;
while (remaining > 0 && r->remaining > 0)
{
if (r->count == 0)
{
/*
* Need to read a new row...
*/
if (remaining == cupsBytesPerLine)
ptr = p;
else
ptr = r->pixels;
/*
* Read using a modified PackBits compression...
*/
if (!cups_raster_read(r, &byte, 1))
{
DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
return (0);
}
r->count = (unsigned)byte + 1;
if (r->count > 1)
ptr = r->pixels;
temp = ptr;
bytes = (ssize_t)cupsBytesPerLine;
while (bytes > 0)
{
/*
* Get a new repeat count...
*/
if (!cups_raster_read(r, &byte, 1))
{
DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
return (0);
}
if (byte & 128)
{
/*
* Copy N literal pixels...
*/
count = (unsigned)(257 - byte) * r->bpp;
if (count > (unsigned)bytes)
count = (unsigned)bytes;
if (!cups_raster_read(r, temp, count))
{
DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
return (0);
}
temp += count;
bytes -= (ssize_t)count;
}
else
{
/*
* Repeat the next N bytes...
*/
count = ((unsigned)byte + 1) * r->bpp;
if (count > (unsigned)bytes)
count = (unsigned)bytes;
if (count < r->bpp)
break;
bytes -= (ssize_t)count;
if (!cups_raster_read(r, temp, r->bpp))
{
DEBUG_puts("1cupsRasterReadPixels: Read error, returning 0.");
return (0);
}
temp += r->bpp;
count -= r->bpp;
while (count > 0)
{
memcpy(temp, temp - r->bpp, r->bpp);
temp += r->bpp;
count -= r->bpp;
}
}
}
/*
* Swap bytes as needed...
*/
if ((r->header.cupsBitsPerColor == 16 ||
r->header.cupsBitsPerPixel == 12 ||
r->header.cupsBitsPerPixel == 16) &&
r->swapped)
cups_swap(ptr, (size_t)bytes);
/*
* Update pointers...
*/
if (remaining >= cupsBytesPerLine)
{
bytes = (ssize_t)cupsBytesPerLine;
r->pcurrent = r->pixels;
r->count --;
r->remaining --;
}
else
{
bytes = (ssize_t)remaining;
r->pcurrent = r->pixels + bytes;
}
/*
* Copy data as needed...
*/
if (ptr != p)
memcpy(p, ptr, (size_t)bytes);
}
else
{
/*
* Copy fragment from buffer...
*/
if ((unsigned)(bytes = (int)(r->pend - r->pcurrent)) > remaining)
bytes = (ssize_t)remaining;
memcpy(p, r->pcurrent, (size_t)bytes);
r->pcurrent += bytes;
if (r->pcurrent >= r->pend)
{
r->pcurrent = r->pixels;
r->count --;
r->remaining --;
}
}
remaining -= (unsigned)bytes;
p += bytes;
}
DEBUG_printf(("1cupsRasterReadPixels: Returning %u", len));
return (len);
}
/*
* 'cupsRasterWriteHeader()' - Write a raster page header from a version 1 page
* header structure.
*
* This function is deprecated. Use @link cupsRasterWriteHeader2@ instead.
*
* @deprecated@
*/
unsigned /* O - 1 on success, 0 on failure */
cupsRasterWriteHeader(
cups_raster_t *r, /* I - Raster stream */
cups_page_header_t *h) /* I - Raster page header */
{
if (r == NULL || r->mode == CUPS_RASTER_READ)
return (0);
/*
* Make a copy of the header, and compute the number of raster
* lines in the page image...
*/
memset(&(r->header), 0, sizeof(r->header));
memcpy(&(r->header), h, sizeof(cups_page_header_t));
if (!cups_raster_update(r))
return (0);
/*
* Write the raster header...
*/
if (r->mode == CUPS_RASTER_WRITE_PWG)
{
/*
* PWG raster data is always network byte order with much of the page header
* zeroed.
*/
cups_page_header2_t fh; /* File page header */
memset(&fh, 0, sizeof(fh));
strlcpy(fh.MediaClass, "PwgRaster", sizeof(fh.MediaClass));
/* PwgRaster */
strlcpy(fh.MediaColor, r->header.MediaColor, sizeof(fh.MediaColor));
strlcpy(fh.MediaType, r->header.MediaType, sizeof(fh.MediaType));
strlcpy(fh.OutputType, r->header.OutputType, sizeof(fh.OutputType));
/* PrintContentType */
fh.CutMedia = htonl(r->header.CutMedia);
fh.Duplex = htonl(r->header.Duplex);
fh.HWResolution[0] = htonl(r->header.HWResolution[0]);
fh.HWResolution[1] = htonl(r->header.HWResolution[1]);
fh.ImagingBoundingBox[0] = htonl(r->header.ImagingBoundingBox[0]);
fh.ImagingBoundingBox[1] = htonl(r->header.ImagingBoundingBox[1]);
fh.ImagingBoundingBox[2] = htonl(r->header.ImagingBoundingBox[2]);
fh.ImagingBoundingBox[3] = htonl(r->header.ImagingBoundingBox[3]);
fh.InsertSheet = htonl(r->header.InsertSheet);
fh.Jog = htonl(r->header.Jog);
fh.LeadingEdge = htonl(r->header.LeadingEdge);
fh.ManualFeed = htonl(r->header.ManualFeed);
fh.MediaPosition = htonl(r->header.MediaPosition);
fh.MediaWeight = htonl(r->header.MediaWeight);
fh.NumCopies = htonl(r->header.NumCopies);
fh.Orientation = htonl(r->header.Orientation);
fh.PageSize[0] = htonl(r->header.PageSize[0]);
fh.PageSize[1] = htonl(r->header.PageSize[1]);
fh.Tumble = htonl(r->header.Tumble);
fh.cupsWidth = htonl(r->header.cupsWidth);
fh.cupsHeight = htonl(r->header.cupsHeight);
fh.cupsBitsPerColor = htonl(r->header.cupsBitsPerColor);
fh.cupsBitsPerPixel = htonl(r->header.cupsBitsPerPixel);
fh.cupsBytesPerLine = htonl(r->header.cupsBytesPerLine);
fh.cupsColorOrder = htonl(r->header.cupsColorOrder);
fh.cupsColorSpace = htonl(r->header.cupsColorSpace);
fh.cupsNumColors = htonl(r->header.cupsNumColors);
fh.cupsInteger[0] = htonl(r->header.cupsInteger[0]);
/* TotalPageCount */
fh.cupsInteger[1] = htonl(r->header.cupsInteger[1]);
/* CrossFeedTransform */
fh.cupsInteger[2] = htonl(r->header.cupsInteger[2]);
/* FeedTransform */
fh.cupsInteger[3] = htonl(r->header.cupsInteger[3]);
/* ImageBoxLeft */
fh.cupsInteger[4] = htonl(r->header.cupsInteger[4]);
/* ImageBoxTop */
fh.cupsInteger[5] = htonl(r->header.cupsInteger[5]);
/* ImageBoxRight */
fh.cupsInteger[6] = htonl(r->header.cupsInteger[6]);
/* ImageBoxBottom */
fh.cupsInteger[7] = htonl(r->header.cupsInteger[7]);
/* BlackPrimary */
fh.cupsInteger[8] = htonl(r->header.cupsInteger[8]);
/* PrintQuality */
fh.cupsInteger[14] = htonl(r->header.cupsInteger[14]);
/* VendorIdentifier */
fh.cupsInteger[15] = htonl(r->header.cupsInteger[15]);
/* VendorLength */
void *dst = fh.cupsReal; /* Bypass bogus compiler warning */
void *src = r->header.cupsReal;
memcpy(dst, src, sizeof(fh.cupsReal) + sizeof(fh.cupsString));
/* VendorData */
strlcpy(fh.cupsRenderingIntent, r->header.cupsRenderingIntent,
sizeof(fh.cupsRenderingIntent));
strlcpy(fh.cupsPageSizeName, r->header.cupsPageSizeName,
sizeof(fh.cupsPageSizeName));
return (cups_raster_io(r, (unsigned char *)&fh, sizeof(fh)) == sizeof(fh));
}
else
return (cups_raster_io(r, (unsigned char *)&(r->header), sizeof(r->header))
== sizeof(r->header));
}
/*
* 'cupsRasterWriteHeader2()' - Write a raster page header from a version 2
* page header structure.
*
* The page header can be initialized using @link cupsRasterInterpretPPD@.
*
* @since CUPS 1.2/macOS 10.5@
*/
unsigned /* O - 1 on success, 0 on failure */
cupsRasterWriteHeader2(
cups_raster_t *r, /* I - Raster stream */
cups_page_header2_t *h) /* I - Raster page header */
{
if (r == NULL || r->mode == CUPS_RASTER_READ)
return (0);
/*
* Make a copy of the header, and compute the number of raster
* lines in the page image...
*/
memcpy(&(r->header), h, sizeof(cups_page_header2_t));
if (!cups_raster_update(r))
return (0);
/*
* Write the raster header...
*/
if (r->mode == CUPS_RASTER_WRITE_PWG)
{
/*
* PWG raster data is always network byte order with most of the page header
* zeroed.
*/
cups_page_header2_t fh; /* File page header */
memset(&fh, 0, sizeof(fh));
strlcpy(fh.MediaClass, "PwgRaster", sizeof(fh.MediaClass));
strlcpy(fh.MediaColor, r->header.MediaColor, sizeof(fh.MediaColor));
strlcpy(fh.MediaType, r->header.MediaType, sizeof(fh.MediaType));
strlcpy(fh.OutputType, r->header.OutputType, sizeof(fh.OutputType));
strlcpy(fh.cupsRenderingIntent, r->header.cupsRenderingIntent,
sizeof(fh.cupsRenderingIntent));
strlcpy(fh.cupsPageSizeName, r->header.cupsPageSizeName,
sizeof(fh.cupsPageSizeName));
fh.CutMedia = htonl(r->header.CutMedia);
fh.Duplex = htonl(r->header.Duplex);
fh.HWResolution[0] = htonl(r->header.HWResolution[0]);
fh.HWResolution[1] = htonl(r->header.HWResolution[1]);
fh.ImagingBoundingBox[0] = htonl(r->header.ImagingBoundingBox[0]);
fh.ImagingBoundingBox[1] = htonl(r->header.ImagingBoundingBox[1]);
fh.ImagingBoundingBox[2] = htonl(r->header.ImagingBoundingBox[2]);
fh.ImagingBoundingBox[3] = htonl(r->header.ImagingBoundingBox[3]);
fh.InsertSheet = htonl(r->header.InsertSheet);
fh.Jog = htonl(r->header.Jog);
fh.LeadingEdge = htonl(r->header.LeadingEdge);
fh.ManualFeed = htonl(r->header.ManualFeed);
fh.MediaPosition = htonl(r->header.MediaPosition);
fh.MediaWeight = htonl(r->header.MediaWeight);
fh.NumCopies = htonl(r->header.NumCopies);
fh.Orientation = htonl(r->header.Orientation);
fh.PageSize[0] = htonl(r->header.PageSize[0]);
fh.PageSize[1] = htonl(r->header.PageSize[1]);
fh.Tumble = htonl(r->header.Tumble);
fh.cupsWidth = htonl(r->header.cupsWidth);
fh.cupsHeight = htonl(r->header.cupsHeight);
fh.cupsBitsPerColor = htonl(r->header.cupsBitsPerColor);
fh.cupsBitsPerPixel = htonl(r->header.cupsBitsPerPixel);
fh.cupsBytesPerLine = htonl(r->header.cupsBytesPerLine);
fh.cupsColorOrder = htonl(r->header.cupsColorOrder);
fh.cupsColorSpace = htonl(r->header.cupsColorSpace);
fh.cupsNumColors = htonl(r->header.cupsNumColors);
fh.cupsInteger[0] = htonl(r->header.cupsInteger[0]);
fh.cupsInteger[1] = htonl(r->header.cupsInteger[1]);
fh.cupsInteger[2] = htonl(r->header.cupsInteger[2]);
fh.cupsInteger[3] = htonl((unsigned)(r->header.cupsImagingBBox[0] * r->header.HWResolution[0] / 72.0));
fh.cupsInteger[4] = htonl((unsigned)(r->header.cupsImagingBBox[1] * r->header.HWResolution[1] / 72.0));
fh.cupsInteger[5] = htonl((unsigned)(r->header.cupsImagingBBox[2] * r->header.HWResolution[0] / 72.0));
fh.cupsInteger[6] = htonl((unsigned)(r->header.cupsImagingBBox[3] * r->header.HWResolution[1] / 72.0));
fh.cupsInteger[7] = htonl(0xffffff);
return (cups_raster_io(r, (unsigned char *)&fh, sizeof(fh)) == sizeof(fh));
}
else
return (cups_raster_io(r, (unsigned char *)&(r->header), sizeof(r->header))
== sizeof(r->header));
}
/*
* 'cupsRasterWritePixels()' - Write raster pixels.
*
* For best performance, filters should write one or more whole lines.
* The "cupsBytesPerLine" value from the page header can be used to allocate
* the line buffer and as the number of bytes to write.
*/
unsigned /* O - Number of bytes written */
cupsRasterWritePixels(cups_raster_t *r, /* I - Raster stream */
unsigned char *p, /* I - Bytes to write */
unsigned len)/* I - Number of bytes to write */
{
ssize_t bytes; /* Bytes read */
unsigned remaining; /* Bytes remaining */
DEBUG_printf(("cupsRasterWritePixels(r=%p, p=%p, len=%u), remaining=%u", (void *)r, (void *)p, len, r->remaining));
if (r == NULL || r->mode == CUPS_RASTER_READ || r->remaining == 0)
return (0);
if (!r->compressed)
{
/*
* Without compression, just write the raster data raw unless the data needs
* to be swapped...
*/
r->remaining -= len / r->header.cupsBytesPerLine;
if (r->swapped &&
(r->header.cupsBitsPerColor == 16 ||
r->header.cupsBitsPerPixel == 12 ||
r->header.cupsBitsPerPixel == 16))
{
unsigned char *bufptr; /* Pointer into write buffer */
unsigned count; /* Remaining count */
/*
* Allocate a write buffer as needed...
*/
if ((size_t)len > r->bufsize)
{
if (r->buffer)
bufptr = realloc(r->buffer, len);
else
bufptr = malloc(len);
if (!bufptr)
return (0);
r->buffer = bufptr;
r->bufsize = len;
}
/*
* Byte swap the pixels...
*/
for (bufptr = r->buffer, count = len; count > 1; count -= 2, bufptr += 2)
{
bufptr[1] = *p++;
bufptr[0] = *p++;
}
if (count) /* This should never happen... */
*bufptr = *p;
/*
* Write the byte-swapped buffer...
*/
bytes = cups_raster_io(r, r->buffer, len);
}
else
bytes = cups_raster_io(r, p, len);
if (bytes < len)
return (0);
else
return (len);
}
/*
* Otherwise, compress each line...
*/
for (remaining = len; remaining > 0; remaining -= (unsigned)bytes, p += bytes)
{
/*
* Figure out the number of remaining bytes on the current line...
*/
if ((bytes = (ssize_t)remaining) > (ssize_t)(r->pend - r->pcurrent))
bytes = (ssize_t)(r->pend - r->pcurrent);
if (r->count > 0)
{
/*
* Check to see if this line is the same as the previous line...
*/
if (memcmp(p, r->pcurrent, (size_t)bytes))
{
if (cups_raster_write(r, r->pixels) <= 0)
return (0);
r->count = 0;
}
else
{
/*
* Mark more bytes as the same...
*/
r->pcurrent += bytes;
if (r->pcurrent >= r->pend)
{
/*
* Increase the repeat count...
*/
r->count ++;
r->pcurrent = r->pixels;
/*
* Flush out this line if it is the last one...
*/
r->remaining --;
if (r->remaining == 0)
{
if (cups_raster_write(r, r->pixels) <= 0)
return (0);
else
return (len);
}
else if (r->count == 256)
{
if (cups_raster_write(r, r->pixels) <= 0)
return (0);
r->count = 0;
}
}
continue;
}
}
if (r->count == 0)
{
/*
* Copy the raster data to the buffer...
*/
memcpy(r->pcurrent, p, (size_t)bytes);
r->pcurrent += bytes;
if (r->pcurrent >= r->pend)
{
/*
* Increase the repeat count...
*/
r->count ++;
r->pcurrent = r->pixels;
/*
* Flush out this line if it is the last one...
*/
r->remaining --;
if (r->remaining == 0)
{
if (cups_raster_write(r, r->pixels) <= 0)
return (0);
}
}
}
}
return (len);
}
/*
* 'cups_raster_read_header()' - Read a raster page header.
*/
static unsigned /* O - 1 on success, 0 on fail */
cups_raster_read_header(
cups_raster_t *r) /* I - Raster stream */
{
size_t len; /* Length for read/swap */
DEBUG_printf(("3cups_raster_read_header(r=%p), r->mode=%d", (void *)r, r ? r->mode : 0));
if (r == NULL || r->mode != CUPS_RASTER_READ)
return (0);
DEBUG_printf(("4cups_raster_read_header: r->iocount=" CUPS_LLFMT, CUPS_LLCAST r->iocount));
/*
* Get the length of the raster header...
*/
if (r->sync == CUPS_RASTER_SYNCv1 || r->sync == CUPS_RASTER_REVSYNCv1)
len = sizeof(cups_page_header_t);
else
len = sizeof(cups_page_header2_t);
DEBUG_printf(("4cups_raster_read_header: len=%d", (int)len));
/*
* Read the header...
*/
memset(&(r->header), 0, sizeof(r->header));
if (cups_raster_read(r, (unsigned char *)&(r->header), len) < (ssize_t)len)
{
DEBUG_printf(("4cups_raster_read_header: EOF, r->iocount=" CUPS_LLFMT, CUPS_LLCAST r->iocount));
return (0);
}
/*
* Swap bytes as needed...
*/
if (r->swapped)
{
unsigned *s, /* Current word */
temp; /* Temporary copy */
DEBUG_puts("4cups_raster_read_header: Swapping header bytes.");
for (len = 81, s = &(r->header.AdvanceDistance);
len > 0;
len --, s ++)
{
temp = *s;
*s = ((temp & 0xff) << 24) |
((temp & 0xff00) << 8) |
((temp & 0xff0000) >> 8) |
((temp & 0xff000000) >> 24);
DEBUG_printf(("4cups_raster_read_header: %08x => %08x", temp, *s));
}
}
/*
* Update the header and row count...
*/
if (!cups_raster_update(r))
return (0);
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));
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);
}
/*
* 'cups_raster_io()' - Read/write bytes from a context, handling interruptions.
*/
static ssize_t /* O - Bytes read/write or -1 */
cups_raster_io(cups_raster_t *r, /* I - Raster stream */
unsigned char *buf, /* I - Buffer for read/write */
size_t bytes) /* I - Number of bytes to read/write */
{
ssize_t count, /* Number of bytes read/written */
total; /* Total bytes read/written */
DEBUG_printf(("5cups_raster_io(r=%p, buf=%p, bytes=" CUPS_LLFMT ")", (void *)r, (void *)buf, CUPS_LLCAST bytes));
for (total = 0; total < (ssize_t)bytes; total += count, buf += count)
{
count = (*r->iocb)(r->ctx, buf, bytes - (size_t)total);
DEBUG_printf(("6cups_raster_io: count=%d, total=%d", (int)count, (int)total));
if (count == 0)
{
DEBUG_puts("6cups_raster_io: Returning 0.");
return (0);
}
else if (count < 0)
{
DEBUG_puts("6cups_raster_io: Returning -1 on error.");
return (-1);
}
#ifdef DEBUG
r->iocount += (size_t)count;
#endif /* DEBUG */
}
DEBUG_printf(("6cups_raster_io: Returning " CUPS_LLFMT ".", CUPS_LLCAST total));
return (total);
}
/*
* 'cups_raster_read()' - Read through the raster buffer.
*/
static ssize_t /* O - Number of bytes read */
cups_raster_read(cups_raster_t *r, /* I - Raster stream */
unsigned char *buf, /* I - Buffer */
size_t bytes) /* I - Number of bytes to read */
{
ssize_t count, /* Number of bytes read */
remaining, /* Remaining bytes in buffer */
total; /* Total bytes read */
DEBUG_printf(("5cups_raster_read(r=%p, buf=%p, bytes=" CUPS_LLFMT ")", (void *)r, (void *)buf, CUPS_LLCAST bytes));
if (!r->compressed)
return (cups_raster_io(r, buf, bytes));
/*
* Allocate a read buffer as needed...
*/
count = (ssize_t)(2 * r->header.cupsBytesPerLine);
if (count < 65536)
count = 65536;
if ((size_t)count > r->bufsize)
{
ssize_t offset = r->bufptr - r->buffer;
/* Offset to current start of buffer */
ssize_t end = r->bufend - r->buffer;/* Offset to current end of buffer */
unsigned char *rptr; /* Pointer in read buffer */
if (r->buffer)
rptr = realloc(r->buffer, (size_t)count);
else
rptr = malloc((size_t)count);
if (!rptr)
return (0);
r->buffer = rptr;
r->bufptr = rptr + offset;
r->bufend = rptr + end;
r->bufsize = (size_t)count;
}
/*
* Loop until we have read everything...
*/
for (total = 0, remaining = (int)(r->bufend - r->bufptr);
total < (ssize_t)bytes;
total += count, buf += count)
{
count = (ssize_t)bytes - total;
DEBUG_printf(("6cups_raster_read: count=" CUPS_LLFMT ", remaining=" CUPS_LLFMT ", buf=%p, bufptr=%p, bufend=%p", CUPS_LLCAST count, CUPS_LLCAST remaining, (void *)buf, (void *)r->bufptr, (void *)r->bufend));
if (remaining == 0)
{
if (count < 16)
{
/*
* Read into the raster buffer and then copy...
*/
remaining = (*r->iocb)(r->ctx, r->buffer, r->bufsize);
if (remaining <= 0)
return (0);
r->bufptr = r->buffer;
r->bufend = r->buffer + remaining;
#ifdef DEBUG
r->iocount += (size_t)remaining;
#endif /* DEBUG */
}
else
{
/*
* Read directly into "buf"...
*/
count = (*r->iocb)(r->ctx, buf, (size_t)count);
if (count <= 0)
return (0);
#ifdef DEBUG
r->iocount += (size_t)count;
#endif /* DEBUG */
continue;
}
}
/*
* Copy bytes from raster buffer to "buf"...
*/
if (count > remaining)
count = remaining;
if (count == 1)
{
/*
* Copy 1 byte...
*/
*buf = *(r->bufptr)++;
remaining --;
}
else if (count < 128)
{
/*
* Copy up to 127 bytes without using memcpy(); this is
* faster because it avoids an extra function call and is
* often further optimized by the compiler...
*/
unsigned char *bufptr; /* Temporary buffer pointer */
remaining -= count;
for (bufptr = r->bufptr; count > 0; count --, total ++)
*buf++ = *bufptr++;
r->bufptr = bufptr;
}
else
{
/*
* Use memcpy() for a large read...
*/
memcpy(buf, r->bufptr, (size_t)count);
r->bufptr += count;
remaining -= count;
}
}
DEBUG_printf(("6cups_raster_read: Returning %ld", (long)total));
return (total);
}
/*
* 'cups_raster_update()' - Update the raster header and row count for the
* current page.
*/
static int /* O - 1 on success, 0 on failure */
cups_raster_update(cups_raster_t *r) /* I - Raster stream */
{
if (r->sync == CUPS_RASTER_SYNCv1 || r->sync == CUPS_RASTER_REVSYNCv1 ||
r->header.cupsNumColors == 0)
{
/*
* Set the "cupsNumColors" field according to the colorspace...
*/
switch (r->header.cupsColorSpace)
{
case CUPS_CSPACE_W :
case CUPS_CSPACE_K :
case CUPS_CSPACE_WHITE :
case CUPS_CSPACE_GOLD :
case CUPS_CSPACE_SILVER :
case CUPS_CSPACE_SW :
r->header.cupsNumColors = 1;
break;
case CUPS_CSPACE_RGB :
case CUPS_CSPACE_CMY :
case CUPS_CSPACE_YMC :
case CUPS_CSPACE_CIEXYZ :
case CUPS_CSPACE_CIELab :
case CUPS_CSPACE_SRGB :
case CUPS_CSPACE_ADOBERGB :
case CUPS_CSPACE_ICC1 :
case CUPS_CSPACE_ICC2 :
case CUPS_CSPACE_ICC3 :
case CUPS_CSPACE_ICC4 :
case CUPS_CSPACE_ICC5 :
case CUPS_CSPACE_ICC6 :
case CUPS_CSPACE_ICC7 :
case CUPS_CSPACE_ICC8 :
case CUPS_CSPACE_ICC9 :
case CUPS_CSPACE_ICCA :
case CUPS_CSPACE_ICCB :
case CUPS_CSPACE_ICCC :
case CUPS_CSPACE_ICCD :
case CUPS_CSPACE_ICCE :
case CUPS_CSPACE_ICCF :
r->header.cupsNumColors = 3;
break;
case CUPS_CSPACE_RGBA :
case CUPS_CSPACE_RGBW :
case CUPS_CSPACE_CMYK :
case CUPS_CSPACE_YMCK :
case CUPS_CSPACE_KCMY :
case CUPS_CSPACE_GMCK :
case CUPS_CSPACE_GMCS :
r->header.cupsNumColors = 4;
break;
case CUPS_CSPACE_KCMYcm :
if (r->header.cupsBitsPerPixel < 8)
r->header.cupsNumColors = 6;
else
r->header.cupsNumColors = 4;
break;
case CUPS_CSPACE_DEVICE1 :
case CUPS_CSPACE_DEVICE2 :
case CUPS_CSPACE_DEVICE3 :
case CUPS_CSPACE_DEVICE4 :
case CUPS_CSPACE_DEVICE5 :
case CUPS_CSPACE_DEVICE6 :
case CUPS_CSPACE_DEVICE7 :
case CUPS_CSPACE_DEVICE8 :
case CUPS_CSPACE_DEVICE9 :
case CUPS_CSPACE_DEVICEA :
case CUPS_CSPACE_DEVICEB :
case CUPS_CSPACE_DEVICEC :
case CUPS_CSPACE_DEVICED :
case CUPS_CSPACE_DEVICEE :
case CUPS_CSPACE_DEVICEF :
r->header.cupsNumColors = r->header.cupsColorSpace -
CUPS_CSPACE_DEVICE1 + 1;
break;
default :
/* Unknown color space */
return (0);
}
}
/*
* Set the number of bytes per pixel/color...
*/
if (r->header.cupsColorOrder == CUPS_ORDER_CHUNKED)
r->bpp = (r->header.cupsBitsPerPixel + 7) / 8;
else
r->bpp = (r->header.cupsBitsPerColor + 7) / 8;
if (r->bpp == 0)
r->bpp = 1;
/*
* Set the number of remaining rows...
*/
if (r->header.cupsColorOrder == CUPS_ORDER_PLANAR)
r->remaining = r->header.cupsHeight * r->header.cupsNumColors;
else
r->remaining = r->header.cupsHeight;
/*
* Allocate the compression buffer...
*/
if (r->compressed)
{
if (r->pixels != NULL)
free(r->pixels);
if ((r->pixels = calloc(r->header.cupsBytesPerLine, 1)) == NULL)
{
r->pcurrent = NULL;
r->pend = NULL;
r->count = 0;
return (0);
}
r->pcurrent = r->pixels;
r->pend = r->pixels + r->header.cupsBytesPerLine;
r->count = 0;
}
return (1);
}
/*
* 'cups_raster_write()' - Write a row of compressed raster data...
*/
static ssize_t /* O - Number of bytes written */
cups_raster_write(
cups_raster_t *r, /* I - Raster stream */
const unsigned char *pixels) /* I - Pixel data to write */
{
const unsigned char *start, /* Start of sequence */
*ptr, /* Current pointer in sequence */
*pend, /* End of raster buffer */
*plast; /* Pointer to last pixel */
unsigned char *wptr; /* Pointer into write buffer */
unsigned bpp, /* Bytes per pixel */
count; /* Count */
DEBUG_printf(("3cups_raster_write(r=%p, pixels=%p)", (void *)r, (void *)pixels));
/*
* Allocate a write buffer as needed...
*/
count = r->header.cupsBytesPerLine * 2;
if (count < 65536)
count = 65536;
if ((size_t)count > r->bufsize)
{
if (r->buffer)
wptr = realloc(r->buffer, count);
else
wptr = malloc(count);
if (!wptr)
{
DEBUG_printf(("4cups_raster_write: Unable to allocate " CUPS_LLFMT " bytes for raster buffer: %s", CUPS_LLCAST count, strerror(errno)));
return (-1);
}
r->buffer = wptr;
r->bufsize = count;
}
/*
* Write the row repeat count...
*/
bpp = r->bpp;
pend = pixels + r->header.cupsBytesPerLine;
plast = pend - bpp;
wptr = r->buffer;
*wptr++ = (unsigned char)(r->count - 1);
/*
* Write using a modified PackBits compression...
*/
for (ptr = pixels; ptr < pend;)
{
start = ptr;
ptr += bpp;
if (ptr == pend)
{
/*
* Encode a single pixel at the end...
*/
*wptr++ = 0;
for (count = bpp; count > 0; count --)
*wptr++ = *start++;
}
else if (!memcmp(start, ptr, bpp))
{
/*
* Encode a sequence of repeating pixels...
*/
for (count = 2; count < 128 && ptr < plast; count ++, ptr += bpp)
if (memcmp(ptr, ptr + bpp, bpp))
break;
*wptr++ = (unsigned char)(count - 1);
for (count = bpp; count > 0; count --)
*wptr++ = *ptr++;
}
else
{
/*
* Encode a sequence of non-repeating pixels...
*/
for (count = 1; count < 128 && ptr < plast; count ++, ptr += bpp)
if (!memcmp(ptr, ptr + bpp, bpp))
break;
if (ptr >= plast && count < 128)
{
count ++;
ptr += bpp;
}
*wptr++ = (unsigned char)(257 - count);
count *= bpp;
memcpy(wptr, start, count);
wptr += count;
}
}
DEBUG_printf(("4cups_raster_write: Writing " CUPS_LLFMT " bytes.", CUPS_LLCAST (wptr - r->buffer)));
return (cups_raster_io(r, r->buffer, (size_t)(wptr - r->buffer)));
}
/*
* 'cups_read_fd()' - Read bytes from a file.
*/
static ssize_t /* O - Bytes read or -1 */
cups_read_fd(void *ctx, /* I - File descriptor as pointer */
unsigned char *buf, /* I - Buffer for read */
size_t bytes) /* I - Maximum number of bytes to read */
{
int fd = (int)((intptr_t)ctx);
/* File descriptor */
ssize_t count; /* Number of bytes read */
#ifdef WIN32 /* Sigh */
while ((count = read(fd, buf, (unsigned)bytes)) < 0)
#else
while ((count = read(fd, buf, bytes)) < 0)
#endif /* WIN32 */
if (errno != EINTR && errno != EAGAIN)
{
DEBUG_printf(("4cups_read_fd: %s", strerror(errno)));
return (-1);
}
DEBUG_printf(("4cups_read_fd: Returning %d bytes.", (int)count));
return (count);
}
/*
* 'cups_swap()' - Swap bytes in raster data...
*/
static void
cups_swap(unsigned char *buf, /* I - Buffer to swap */
size_t bytes) /* I - Number of bytes to swap */
{
unsigned char even, odd; /* Temporary variables */
bytes /= 2;
while (bytes > 0)
{
even = buf[0];
odd = buf[1];
buf[0] = odd;
buf[1] = even;
buf += 2;
bytes --;
}
}
/*
* 'cups_write_fd()' - Write bytes to a file.
*/
static ssize_t /* O - Bytes written or -1 */
cups_write_fd(void *ctx, /* I - File descriptor pointer */
unsigned char *buf, /* I - Bytes to write */
size_t bytes) /* I - Number of bytes to write */
{
int fd = (int)((intptr_t)ctx);
/* File descriptor */
ssize_t count; /* Number of bytes written */
#ifdef WIN32 /* Sigh */
while ((count = write(fd, buf, (unsigned)bytes)) < 0)
#else
while ((count = write(fd, buf, bytes)) < 0)
#endif /* WIN32 */
if (errno != EINTR && errno != EAGAIN)
{
DEBUG_printf(("4cups_write_fd: %s", strerror(errno)));
return (-1);
}
return (count);
}
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