/*
- * "$Id: raster.c 181 2006-06-22 20:01:18Z jlovell $"
+ * "$Id: raster.c 5671 2006-06-16 11:17:39Z mike $"
*
* Raster file routines for the Common UNIX Printing System (CUPS).
*
* cups_raster_read_header() - Read a raster page header.
* cups_raster_update() - Update the raster header and row count for the
* current page.
- * cups_raster_write() - Write a row of raster data...
* cups_read() - Read bytes from a file.
* cups_swap() - Swap bytes in raster data...
* cups_write() - Write bytes to a file.
static int cups_raster_read(cups_raster_t *r, unsigned char *buf,
int bytes);
static void cups_raster_update(cups_raster_t *r);
-static int cups_raster_write(cups_raster_t *r, const unsigned char *pixels);
static int cups_read(int fd, unsigned char *buf, int bytes);
static void cups_swap(unsigned char *buf, int bytes);
static int cups_write(int fd, const unsigned char *buf, int bytes);
return (NULL);
r->fd = fd;
- r->mode = mode == CUPS_RASTER_WRITE_COMPRESSED ? CUPS_RASTER_WRITE : mode;
+ r->mode = mode;
if (mode == CUPS_RASTER_READ)
{
* Open for write - put sync word...
*/
- if (mode == CUPS_RASTER_WRITE_COMPRESSED)
- {
- r->compressed = 1;
- r->sync = CUPS_RASTER_SYNCv2;
- }
- else
- r->sync = CUPS_RASTER_SYNC;
+ r->sync = CUPS_RASTER_SYNC;
if (cups_write(r->fd, (unsigned char *)&(r->sync), sizeof(r->sync))
< sizeof(r->sync))
unsigned char *p, /* I - Bytes to write */
unsigned len)/* I - Number of bytes to write */
{
- int bytes; /* Bytes read */
- unsigned remaining; /* Bytes remaining */
-
-
#ifdef DEBUG
fprintf(stderr, "cupsRasterWritePixels(r=%p, p=%p, len=%u), remaining=%u\n",
r, p, len, r->remaining);
if (r == NULL || r->mode != CUPS_RASTER_WRITE || r->remaining == 0)
return (0);
- if (!r->compressed)
- {
- /*
- * Without compression, just write the raster data raw...
- */
-
- r->remaining -= len / r->header.cupsBytesPerLine;
-
- return (cups_write(r->fd, p, len));
- }
-
/*
- * Otherwise, compress each line...
+ * No write compression, just write the raster data raw...
*/
- for (remaining = len; remaining > 0; remaining -= bytes, p += bytes)
- {
- /*
- * Figure out the number of remaining bytes on the current line...
- */
-
- if ((bytes = remaining) > (r->pend - r->pcurrent))
- bytes = 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, bytes))
- {
- if (!cups_raster_write(r, r->pixels))
- 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)
- return (cups_raster_write(r, r->pixels));
- 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, 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 --;
+ r->remaining -= len / r->header.cupsBytesPerLine;
- if (r->remaining == 0)
- return (cups_raster_write(r, r->pixels));
- }
- }
- }
-
- return (len);
+ return (cups_write(r->fd, p, len));
}
}
-/*
- * 'cups_raster_write()' - Write a row of compressed raster data...
- */
-
-static int /* 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 */
- int bpp, /* Bytes per pixel */
- count, /* Count */
- maxrun; /* Maximum run of 128 * bpp */
-
-
-#ifdef DEBUG
- fprintf(stderr, "cups_raster_write(r=%p, pixels=%p)\n", r, pixels);
-#endif /* DEBUG */
-
- /*
- * Allocate a write buffer as needed...
- */
-
- count = r->header.cupsBytesPerLine * 2;
- if (count > r->bufsize)
- {
- if (r->buffer)
- wptr = realloc(r->buffer, count);
- else
- wptr = malloc(count);
-
- if (!wptr)
- 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++ = r->count - 1;
- maxrun = 128 * bpp;
-
- /*
- * Write using a modified TIFF "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++ = count - 1;
- for (count = bpp; count > 0; count --)
- *wptr++ = *ptr++;
- }
- else
- {
- /*
- * Encode a sequence of non-repeating pixels...
- */
-
- for (count = 1; count < 127 && ptr < plast; count ++, ptr += bpp)
- if (!memcmp(ptr, ptr + bpp, bpp))
- break;
-
- if (ptr >= plast && count < 128)
- {
- count ++;
- ptr += bpp;
- }
-
- *wptr++ = 257 - count;
-
- count *= bpp;
- memcpy(wptr, start, count);
- wptr += count;
- }
- }
-
- return (cups_write(r->fd, r->buffer, wptr - r->buffer));
-}
-
-
/*
* 'cups_read()' - Read bytes from a file.
*/
/*
- * End of "$Id: raster.c 181 2006-06-22 20:01:18Z jlovell $".
+ * End of "$Id: raster.c 5671 2006-06-16 11:17:39Z mike $".
*/
projects / thirdparty / cups.git / blobdiff