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tiff2ps.c
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tiff2ps.c
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/*
* Copyright (c) 1988-1997 Sam Leffler
* Copyright (c) 1991-1997 Silicon Graphics, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that (i) the above copyright notices and this permission notice appear in
* all copies of the software and related documentation, and (ii) the names of
* Sam Leffler and Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Sam Leffler and Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include "tiff_tools_internal.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h> /* for atof */
#include <string.h>
#include <time.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <tiffio.h>
#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#endif
#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif
/*
* Revision history
* 2013-Jan-21
* Richard Nolde: Fix bug in auto rotate option code. Once a
* rotation angle was set by the auto rotate check, it was
* retained for all pages that followed instead of being
* retested for each page.
*
* 2010-Sep-17
* Richard Nolde: Reinstate code from Feb 2009 that never got
* accepted into CVS with major modifications to handle -H and -W
* options. Replaced original PlaceImage function with several
* new functions that make support for multiple output pages
* from a single image easier to understand. Added additional
* warning messages for incompatible command line options.
* Add new command line options to specify PageOrientation
* Document Structuring Comment for landscape or portrait
* and code to determine the values from output width and height
* if not specified on the command line.
* Add new command line option to specify document creator
* as an alterntive to the string "tiff2ps" following model
* of patch submitted by Thomas Jarosch for specifying a
* document title which is also supported now.
*
* 2009-Feb-11
* Richard Nolde: Added support for rotations of 90, 180, 270
* and auto using -r <90|180|270|auto>. Auto picks the best
* fit for the image on the specified paper size (eg portrait
* or landscape) if -h or -w is specified. Rotation is in
* degrees counterclockwise since that is how Postscript does
* it. The auto opption rotates the image 90 degrees ccw to
* produce landscape if that is a better fit than portrait.
*
* Cleaned up code in TIFF2PS and broke into smaller functions
* to simplify rotations.
*
* Identified incompatible options and returned errors, eg
* -i for imagemask operator is only available for Level2 or
* Level3 Postscript in the current implementation since there
* is a difference in the way the operands are called for Level1
* and there is no function to provide the Level1 version.
* -H was not handled properly if -h and/or -w were specified.
* It should only clip the masked images if the scaled image
* exceeds the maxPageHeight specified with -H.
*
* New design allows for all of the following combinations:
* Conversion of TIFF to Postscript with optional rotations
* of 90, 180, 270, or auto degrees counterclockwise
* Conversion of TIFF to Postscript with entire image scaled
* to maximum of values specified with -h or -w while
* maintaining aspect ratio. Same rotations apply.
* Conversion of TIFF to Postscript with clipping of output
* viewport to height specified with -H, producing multiple
* pages at this height and original width as needed.
* Same rotations apply.
* Conversion of TIFF to Postscript with image scaled to
* maximum specified by -h and -w and the resulting scaled
* image is presented in an output viewport clipped by -H height.
* The same rotations apply.
*
* Added maxPageWidth option using -W flag. MaxPageHeight and
* MaxPageWidth are mutually exclusive since the aspect ratio
* cannot be maintained if you set both.
* Rewrote PlaceImage to allow maxPageHeight and maxPageWidth
* options to work with values smaller or larger than the
* physical paper size and still preserve the aspect ratio.
* This is accomplished by creating multiple pages across
* as well as down if need be.
*
* 2001-Mar-21
* I (Bruce A. Mallett) added this revision history comment ;)
*
* Fixed PS_Lvl2page() code which outputs non-ASCII85 raw
* data. Moved test for when to output a line break to
* *after* the output of a character. This just serves
* to fix an eye-nuisance where the first line of raw
* data was one character shorter than subsequent lines.
*
* Added an experimental ASCII85 encoder which can be used
* only when there is a single buffer of bytes to be encoded.
* This version is much faster at encoding a straight-line
* buffer of data because it can avoid a lot of the loop
* overhead of the byte-by-byte version. To use this version
* you need to define EXP_ASCII85ENCODER (experimental ...).
*
* Added bug fix given by Michael Schmidt to PS_Lvl2page()
* in which an end-of-data marker ('>') was not being output
* when producing non-ASCII85 encoded PostScript Level 2
* data.
*
* Fixed PS_Lvl2colorspace() so that it no longer assumes that
* a TIFF having more than 2 planes is a CMYK. This routine
* no longer looks at the samples per pixel but instead looks
* at the "photometric" value. This change allows support of
* CMYK TIFFs.
*
* Modified the PostScript L2 imaging loop so as to test if
* the input stream is still open before attempting to do a
* flushfile on it. This was done because some RIPs close
* the stream after doing the image operation.
*
* Got rid of the realloc() being done inside a loop in the
* PSRawDataBW() routine. The code now walks through the
* byte-size array outside the loop to determine the largest
* size memory block that will be needed.
*
* Added "-m" switch to ask tiff2ps to, where possible, use the
* "imagemask" operator instead of the "image" operator.
*
* Added the "-i #" switch to allow interpolation to be disabled.
*
* Unrolled a loop or two to improve performance.
*/
/*
* Define EXP_ASCII85ENCODER if you want to use an experimental
* version of the ASCII85 encoding routine. The advantage of
* using this routine is that tiff2ps will convert to ASCII85
* encoding at between 3 and 4 times the speed as compared to
* using the old (non-experimental) encoder. The disadvantage
* is that you will be using a new (and unproven) encoding
* routine. So user beware, you have been warned!
*/
#define EXP_ASCII85ENCODER
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
#define DEFAULT_MAX_MALLOC (256 * 1024 * 1024)
/* malloc size limit (in bytes)
* disabled when set to 0 */
static tmsize_t maxMalloc = DEFAULT_MAX_MALLOC;
int ascii85 = FALSE; /* use ASCII85 encoding */
int interpolate = TRUE; /* interpolate level2 image */
int level2 = FALSE; /* generate PostScript level 2 */
int level3 = FALSE; /* generate PostScript level 3 */
int printAll = FALSE; /* print all images in file */
int generateEPSF = TRUE; /* generate Encapsulated PostScript */
int PSduplex = FALSE; /* enable duplex printing */
int PStumble = FALSE; /* enable top edge binding */
int PSavoiddeadzone = TRUE; /* enable avoiding printer deadzone */
double maxPageHeight =
0; /* maximum height to select from image and print per page */
double maxPageWidth =
0; /* maximum width to select from image and print per page */
double splitOverlap = 0; /* amount for split pages to overlag */
int rotation = 0; /* optional value for rotation angle */
int auto_rotate = 0; /* rotate image for best fit on the page */
char *filename = NULL; /* input filename */
char *title = NULL; /* optional document title string */
char *creator = NULL; /* optional document creator string */
char pageOrientation[12]; /* set optional PageOrientation DSC to Landscape or
Portrait */
int useImagemask = FALSE; /* Use imagemask instead of image operator */
uint16_t res_unit = 0; /* Resolution units: 2 - inches, 3 - cm */
/*
* ASCII85 Encoding Support.
*/
unsigned char ascii85buf[10];
int ascii85count;
int ascii85breaklen;
int TIFF2PS(FILE *, TIFF *, double, double, double, double, int);
void PSpage(FILE *, TIFF *, uint32_t, uint32_t);
void PSColorContigPreamble(FILE *, uint32_t, uint32_t, int);
void PSColorSeparatePreamble(FILE *, uint32_t, uint32_t, int);
void PSDataColorContig(FILE *, TIFF *, uint32_t, uint32_t, int);
void PSDataColorSeparate(FILE *, TIFF *, uint32_t, uint32_t, int);
void PSDataPalette(FILE *, TIFF *, uint32_t, uint32_t);
void PSDataBW(FILE *, TIFF *, uint32_t, uint32_t);
void Ascii85Init(void);
void Ascii85Put(unsigned char code, FILE *fd);
void Ascii85Flush(FILE *fd);
void PSHead(FILE *, double, double, double, double);
void PSTail(FILE *, int);
int psStart(FILE *, int, int, int *, double *, double, double, double, double,
double, double, double, double, double, double);
int psPageSize(FILE *, int, double, double, double, double, double, double);
int psRotateImage(FILE *, int, double, double, double, double);
int psMaskImage(FILE *, TIFF *, int, int, int *, double, double, double, double,
double, double, double, double, double);
int psScaleImage(FILE *, double, int, int, double, double, double, double,
double, double);
int get_viewport(double, double, double, double, double *, double *, int);
int exportMaskedImage(FILE *, double, double, double, double, int, int, double,
double, double, int, int);
#if defined(EXP_ASCII85ENCODER)
tsize_t Ascii85EncodeBlock(uint8_t *ascii85_p, unsigned f_eod,
const uint8_t *raw_p, tsize_t raw_l);
#endif
static void usage(int);
/**
* This custom malloc function enforce a maximum allocation size
*/
static void *limitMalloc(tmsize_t s)
{
/* tmsize_t is signed and _TIFFmalloc() converts s to size_t. Therefore
* check for negative s. */
if (maxMalloc && ((s > maxMalloc) || (s < 0)))
{
fprintf(stderr,
"MemoryLimitError: allocation of %" TIFF_SSIZE_FORMAT
" bytes is forbidden. Limit is %" TIFF_SSIZE_FORMAT ".\n",
s, maxMalloc);
fprintf(stderr, " use -M option to change limit.\n");
return NULL;
}
return _TIFFmalloc(s);
}
int main(int argc, char *argv[])
{
int dirnum = -1, c, np = 0;
int centered = 0;
double bottommargin = 0;
double leftmargin = 0;
double pageWidth = 0;
double pageHeight = 0;
uint32_t diroff = 0;
#if !HAVE_DECL_OPTARG
extern char *optarg;
extern int optind;
#endif
FILE *output = stdout;
pageOrientation[0] = '\0';
while ((c = getopt(argc, argv,
"b:d:h:H:W:L:M:i:w:l:o:O:P:C:r:t:acemxyzps1238DT")) !=
-1)
switch (c)
{
case 'M':
maxMalloc = (tmsize_t)strtoul(optarg, NULL, 0) << 20;
break;
case 'b':
bottommargin = atof(optarg);
break;
case 'c':
centered = 1;
break;
case 'C':
creator = optarg;
break;
case 'd': /* without -a, this only processes one image at this IFD
*/
dirnum = atoi(optarg);
break;
case 'D':
PSduplex = TRUE;
break;
case 'i':
interpolate = atoi(optarg) ? TRUE : FALSE;
break;
case 'T':
PStumble = TRUE;
break;
case 'e':
PSavoiddeadzone = FALSE;
generateEPSF = TRUE;
break;
case 'h':
pageHeight = atof(optarg);
break;
case 'H':
maxPageHeight = atof(optarg);
break;
case 'W':
maxPageWidth = atof(optarg);
break;
case 'L':
splitOverlap = atof(optarg);
break;
case 'm':
useImagemask = TRUE;
break;
case 'o':
switch (optarg[0])
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
diroff = (uint32_t)strtoul(optarg, NULL, 0);
break;
default:
TIFFError("-o", "Offset must be a numeric value.");
exit(EXIT_FAILURE);
}
break;
case 'O': /* XXX too bad -o is already taken */
output = fopen(optarg, "w");
if (output == NULL)
{
fprintf(stderr, "%s: %s: Cannot open output file.\n",
argv[0], optarg);
exit(EXIT_FAILURE);
}
break;
case 'P':
switch (optarg[0])
{
case 'l':
case 'L':
strcpy(pageOrientation, "Landscape");
break;
case 'p':
case 'P':
strcpy(pageOrientation, "Portrait");
break;
default:
TIFFError(
"-P",
"Page orientation must be Landscape or Portrait");
exit(EXIT_FAILURE);
}
break;
case 'l':
leftmargin = atof(optarg);
break;
case 'a': /* removed fall through to generate warning below, R Nolde
09-01-2010 */
printAll = TRUE;
break;
case 'p':
generateEPSF = FALSE;
break;
case 'r':
if (strcmp(optarg, "auto") == 0)
{
rotation = 0;
auto_rotate = TRUE;
}
else
{
rotation = atoi(optarg);
auto_rotate = FALSE;
}
switch (rotation)
{
case 0:
case 90:
case 180:
case 270:
break;
default:
fprintf(stderr, "Rotation angle must be 90, 180, 270 "
"(degrees ccw) or auto\n");
exit(EXIT_FAILURE);
}
break;
case 's':
printAll = FALSE;
break;
case 't':
title = optarg;
break;
case 'w':
pageWidth = atof(optarg);
break;
case 'z':
PSavoiddeadzone = FALSE;
break;
case '1':
level2 = FALSE;
level3 = FALSE;
ascii85 = FALSE;
break;
case '2':
level2 = TRUE;
ascii85 = TRUE; /* default to yes */
break;
case '3':
level3 = TRUE;
ascii85 = TRUE; /* default to yes */
break;
case '8':
ascii85 = FALSE;
break;
case 'x':
res_unit = RESUNIT_CENTIMETER;
break;
case 'y':
res_unit = RESUNIT_INCH;
break;
case '?':
usage(EXIT_FAILURE);
}
if (useImagemask == TRUE)
{
if ((level2 == FALSE) && (level3 == FALSE))
{
TIFFError(
"-m ",
" imagemask operator requires Postscript Level2 or Level3");
exit(EXIT_FAILURE);
}
}
if (pageWidth && (maxPageWidth > pageWidth))
{
TIFFError("-W", "Max viewport width cannot exceed page width");
exit(EXIT_FAILURE);
}
/* auto rotate requires a specified page width and height */
if (auto_rotate == TRUE)
{
/*
if ((pageWidth == 0) || (pageHeight == 0))
TIFFWarning ("-r auto", " requires page height and width specified with
-h and -w");
*/
if ((maxPageWidth > 0) || (maxPageHeight > 0))
{
TIFFError("-r auto", " is incompatible with maximum page "
"width/height specified by -H or -W");
exit(EXIT_FAILURE);
}
}
if ((maxPageWidth > 0) && (maxPageHeight > 0))
{
TIFFError("-H and -W",
" Use only one of -H or -W to define a viewport");
exit(EXIT_FAILURE);
}
if ((generateEPSF == TRUE) && (printAll == TRUE))
{
TIFFError(" -e and -a", "Warning: Cannot generate Encapsulated "
"Postscript for multiple images");
generateEPSF = FALSE;
}
if ((generateEPSF == TRUE) && (PSduplex == TRUE))
{
TIFFError(
" -e and -D",
"Warning: Encapsulated Postscript does not support Duplex option");
PSduplex = FALSE;
}
if ((generateEPSF == TRUE) && (PStumble == TRUE))
{
TIFFError(" -e and -T", "Warning: Encapsulated Postscript does not "
"support Top Edge Binding option");
PStumble = FALSE;
}
if ((generateEPSF == TRUE) && (PSavoiddeadzone == TRUE))
PSavoiddeadzone = FALSE;
for (; argc - optind > 0; optind++)
{
TIFFOpenOptions *opts = TIFFOpenOptionsAlloc();
if (opts == NULL)
{
return EXIT_FAILURE;
}
TIFFOpenOptionsSetMaxSingleMemAlloc(opts, maxMalloc);
TIFF *tif = TIFFOpenExt(filename = argv[optind], "r", opts);
TIFFOpenOptionsFree(opts);
if (tif != NULL)
{
if (dirnum != -1 && !TIFFSetDirectory(tif, (tdir_t)dirnum))
{
TIFFClose(tif);
return (EXIT_FAILURE);
}
else if (diroff != 0 && !TIFFSetSubDirectory(tif, diroff))
{
TIFFClose(tif);
return (EXIT_FAILURE);
}
np = TIFF2PS(output, tif, pageWidth, pageHeight, leftmargin,
bottommargin, centered);
if (np < 0)
{
TIFFError("Error", "Unable to process %s", filename);
}
TIFFClose(tif);
}
}
if (np)
PSTail(output, np);
else
usage(EXIT_FAILURE);
if (output != stdout)
fclose(output);
return (EXIT_SUCCESS);
}
static uint16_t samplesperpixel;
static uint16_t bitspersample;
static uint16_t planarconfiguration;
static uint16_t photometric;
static uint16_t compression;
static uint16_t extrasamples;
static int alpha;
static int checkImage(TIFF *tif)
{
switch (photometric)
{
case PHOTOMETRIC_YCBCR:
if ((compression == COMPRESSION_JPEG ||
compression == COMPRESSION_OJPEG) &&
planarconfiguration == PLANARCONFIG_CONTIG)
{
/* can rely on libjpeg to convert to RGB */
TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB);
photometric = PHOTOMETRIC_RGB;
}
else
{
if (level2 || level3)
break;
TIFFError(filename, "Can not handle image with %s",
"PhotometricInterpretation=YCbCr");
return (0);
}
/* fall through... */
case PHOTOMETRIC_RGB:
if (alpha && bitspersample != 8)
{
TIFFError(filename,
"Can not handle %" PRIu16
"-bit/sample RGB image with alpha",
bitspersample);
return (0);
}
/* fall through... */
case PHOTOMETRIC_SEPARATED:
case PHOTOMETRIC_PALETTE:
case PHOTOMETRIC_MINISBLACK:
case PHOTOMETRIC_MINISWHITE:
break;
case PHOTOMETRIC_LOGL:
case PHOTOMETRIC_LOGLUV:
if (compression != COMPRESSION_SGILOG &&
compression != COMPRESSION_SGILOG24)
{
TIFFError(
filename,
"Can not handle %s data with compression other than SGILog",
(photometric == PHOTOMETRIC_LOGL) ? "LogL" : "LogLuv");
return (0);
}
/* rely on library to convert to RGB/greyscale */
TIFFSetField(tif, TIFFTAG_SGILOGDATAFMT, SGILOGDATAFMT_8BIT);
photometric = (photometric == PHOTOMETRIC_LOGL)
? PHOTOMETRIC_MINISBLACK
: PHOTOMETRIC_RGB;
bitspersample = 8;
break;
case PHOTOMETRIC_CIELAB:
/* fall through... */
default:
TIFFError(
filename,
"Can not handle image with PhotometricInterpretation=%" PRIu16,
photometric);
return (0);
}
switch (bitspersample)
{
case 1:
case 2:
case 4:
case 8:
case 16:
break;
default:
TIFFError(filename, "Can not handle %" PRIu16 "-bit/sample image",
bitspersample);
return (0);
}
if (planarconfiguration == PLANARCONFIG_SEPARATE && extrasamples > 0)
TIFFWarning(filename, "Ignoring extra samples");
return (1);
}
#define PS_UNIT_SIZE 72.0F
#define PSUNITS(npix, res) ((npix) * (PS_UNIT_SIZE / (res)))
static const char RGBcolorimage[] = "\
/bwproc {\n\
rgbproc\n\
dup length 3 idiv string 0 3 0\n\
5 -1 roll {\n\
add 2 1 roll 1 sub dup 0 eq {\n\
pop 3 idiv\n\
3 -1 roll\n\
dup 4 -1 roll\n\
dup 3 1 roll\n\
5 -1 roll put\n\
1 add 3 0\n\
} { 2 1 roll } ifelse\n\
} forall\n\
pop pop pop\n\
} def\n\
/colorimage where {pop} {\n\
/colorimage {pop pop /rgbproc exch def {bwproc} image} bind def\n\
} ifelse\n\
";
/*
* Adobe Photoshop requires a comment line of the form:
*
* %ImageData: <cols> <rows> <depth> <main channels> <pad channels>
* <block size> <1 for binary|2 for hex> "data start"
*
* It is claimed to be part of some future revision of the EPS spec.
*/
static void PhotoshopBanner(FILE *fd, uint32_t w, uint32_t h, int bs, int nc,
const char *startline)
{
fprintf(fd, "%%ImageData: %" PRIu32 " %" PRIu32 " %" PRIu16 " %d 0 %d 2 \"",
w, h, bitspersample, nc, bs);
fprintf(fd, startline, nc);
fprintf(fd, "\"\n");
}
/* Convert pixel width and height pw, ph, to points pprw, pprh
* using image resolution and resolution units from TIFF tags.
* pw : image width in pixels
* ph : image height in pixels
* pprw : image width in PS units (72 dpi)
* pprh : image height in PS units (72 dpi)
*/
static void setupPageState(TIFF *tif, uint32_t *pw, uint32_t *ph, double *pprw,
double *pprh)
{
float xres = 0.0F, yres = 0.0F;
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, pw);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, ph);
if (res_unit == 0) /* Not specified as command line option */
if (!TIFFGetFieldDefaulted(tif, TIFFTAG_RESOLUTIONUNIT, &res_unit))
res_unit = RESUNIT_INCH;
/*
* Calculate printable area.
*/
if (!TIFFGetField(tif, TIFFTAG_XRESOLUTION, &xres) ||
fabs(xres) < 0.0000001)
xres = PS_UNIT_SIZE;
if (!TIFFGetField(tif, TIFFTAG_YRESOLUTION, &yres) ||
fabs(yres) < 0.0000001)
yres = PS_UNIT_SIZE;
switch (res_unit)
{
case RESUNIT_CENTIMETER:
xres *= 2.54F, yres *= 2.54F;
break;
case RESUNIT_INCH:
break;
case RESUNIT_NONE: /* Subsequent code assumes we have converted to
inches! */
res_unit = RESUNIT_INCH;
break;
default: /* Last ditch guess for unspecified RESUNIT case
* check that the resolution is not inches before scaling it.
* Moved to end of function with additional check, RJN,
* 08-31-2010 if (xres != PS_UNIT_SIZE || yres != PS_UNIT_SIZE)
* xres *= PS_UNIT_SIZE, yres *= PS_UNIT_SIZE;
*/
break;
}
/* This is a hack to deal with images that have no meaningful Resolution
* Size but may have x and/or y resolutions of 1 pixel per undefined unit.
*/
if ((xres > 1.0) && (xres != PS_UNIT_SIZE))
*pprw = PSUNITS(*pw, xres);
else
*pprw = PSUNITS(*pw, PS_UNIT_SIZE);
if ((yres > 1.0) && (yres != PS_UNIT_SIZE))
*pprh = PSUNITS(*ph, yres);
else
*pprh = PSUNITS(*ph, PS_UNIT_SIZE);
}
static int isCCITTCompression(TIFF *tif)
{
uint16_t compress;
TIFFGetField(tif, TIFFTAG_COMPRESSION, &compress);
return (compress == COMPRESSION_CCITTFAX3 ||
compress == COMPRESSION_CCITTFAX4 ||
compress == COMPRESSION_CCITTRLE ||
compress == COMPRESSION_CCITTRLEW);
}
static tsize_t tf_bytesperrow;
static tsize_t ps_bytesperrow;
static uint32_t tf_rowsperstrip;
static uint32_t tf_numberstrips;
static char *hex = "0123456789abcdef";
/*
* Pagewidth and pageheight are the output size in points,
* may refer to values specified with -h and -w, or to
* values read from the image if neither -h nor -w are used.
* Imagewidth and imageheight are image size in points.
* Ximages and Yimages are number of pages across and down.
* Only one of maxPageHeight or maxPageWidth can be used.
* These are global variables unfortunately.
*/
int get_subimage_count(double pagewidth, double pageheight, double imagewidth,
double imageheight, int *ximages, int *yimages,
int rotation, double scale)
{
int pages = 1;
double splitheight = 0; /* Requested Max Height in points */
double splitwidth = 0; /* Requested Max Width in points */
double overlap = 0; /* Repeated edge width in points */
splitheight = maxPageHeight * PS_UNIT_SIZE;
splitwidth = maxPageWidth * PS_UNIT_SIZE;
overlap = splitOverlap * PS_UNIT_SIZE;
pagewidth *= PS_UNIT_SIZE;
pageheight *= PS_UNIT_SIZE;
if ((imagewidth < 1.0) || (imageheight < 1.0))
{
TIFFError("get_subimage_count", "Invalid image width or height");
return (0);
}
switch (rotation)
{
case 0:
case 180:
if (splitheight > 0) /* -H maxPageHeight */
{
if (imageheight >
splitheight) /* More than one vertical image segment */
{
if (pagewidth)
*ximages = (int)ceil((scale * imagewidth) /
(pagewidth - overlap));
else
*ximages = 1;
*yimages = (int)ceil(
(scale * imageheight) /
(splitheight - overlap)); /* Max vert pages needed */
}
else
{
if (pagewidth)
*ximages = (int)ceil(
(scale * imagewidth) /
(pagewidth - overlap)); /* Max horz pages needed */
else
*ximages = 1;
*yimages = 1; /* Max vert pages needed */
}
}
else
{
if (splitwidth > 0) /* -W maxPageWidth */
{
if (imagewidth > splitwidth)
{
*ximages = (int)ceil(
(scale * imagewidth) /
(splitwidth - overlap)); /* Max horz pages needed */
if (pageheight)
*yimages = (int)ceil(
(scale * imageheight) /
(pageheight -
overlap)); /* Max vert pages needed */
else
*yimages = 1;
}
else
{
*ximages = 1; /* Max vert pages needed */
if (pageheight)
*yimages = (int)ceil(
(scale * imageheight) /
(pageheight -
overlap)); /* Max vert pages needed */
else
*yimages = 1;
}
}
else
{
*ximages = 1;
*yimages = 1;
}
}
break;
case 90:
case 270:
if (splitheight > 0) /* -H maxPageHeight */
{
if (imagewidth >
splitheight) /* More than one vertical image segment */
{
*yimages = (int)ceil(
(scale * imagewidth) /
(splitheight - overlap)); /* Max vert pages needed */
if (pagewidth)
*ximages = (int)ceil(
(scale * imageheight) /
(pagewidth - overlap)); /* Max horz pages needed */
else
*ximages = 1;
}
else
{
*yimages = 1; /* Max vert pages needed */
if (pagewidth)
*ximages = (int)ceil(
(scale * imageheight) /
(pagewidth - overlap)); /* Max horz pages needed */
else
*ximages = 1;
}
}
else
{
if (splitwidth > 0) /* -W maxPageWidth */
{
if (imageheight > splitwidth)
{
if (pageheight)
*yimages = (int)ceil(
(scale * imagewidth) /
(pageheight -
overlap)); /* Max vert pages needed */
else
*yimages = 1;
*ximages = (int)ceil(
(scale * imageheight) /
(splitwidth - overlap)); /* Max horz pages needed */
}
else
{
if (pageheight)
*yimages = (int)ceil(
(scale * imagewidth) /
(pageheight -
overlap)); /* Max horz pages needed */
else
*yimages = 1;
*ximages = 1; /* Max vert pages needed */
}
}
else
{
*ximages = 1;
*yimages = 1;
}
}
break;
default:
*ximages = 1;
*yimages = 1;
}
pages = (*ximages) * (*yimages);
return (pages);
}
/* New version of PlaceImage that handles only the translation and rotation
* for a single output page.
*/
int exportMaskedImage(FILE *fp, double pagewidth, double pageheight,
double imagewidth, double imageheight, int row,
int column, double left_offset, double bott_offset,
double scale, int center, int rotation)
{
double xtran = 0.0;
double ytran = 0.0;
double xscale = 1.0;
double yscale = 1.0;
double splitheight = 0; /* Requested Max Height in points */
double splitwidth = 0; /* Requested Max Width in points */
double overlap = 0; /* Repeated edge width in points */
double subimage_height = 0.0;
splitheight = maxPageHeight * PS_UNIT_SIZE;
splitwidth = maxPageWidth * PS_UNIT_SIZE;
overlap = splitOverlap * PS_UNIT_SIZE;
xscale = scale * imagewidth;
yscale = scale * imageheight;
if ((xscale < 0.0) || (yscale < 0.0))
{
TIFFError("exportMaskedImage", "Invalid parameters.");
return (-1);
}
/* If images are cropped to a vewport with -H or -W, the output pages are
* shifted to the top of each output page rather than the Postscript default
* lower edge.
*/
switch (rotation)
{
case 0:
case 180:
if (splitheight > 0) /* -H maxPageHeight */
{
if (splitheight <
imageheight) /* More than one vertical image segments */
{
/* Intra2net: Keep correct apspect ratio */
xscale = (imagewidth + overlap) *
(pageheight / splitheight) * scale;
xtran = -1.0 * column * (pagewidth - overlap);
subimage_height =
imageheight - ((splitheight - overlap) * row);
ytran = pageheight -
subimage_height * (pageheight / splitheight);
}
else /* Only one page in vertical direction */
{
xtran = -1.0 * column * (pagewidth - overlap);
ytran = splitheight - imageheight;
}
}
else
{
if (splitwidth > 0) /* maxPageWidth */
{
if (splitwidth < imagewidth)
{
xtran = -1.0 * column * splitwidth;
ytran = -1.0 * row * (pageheight - overlap);
}
else /* Only one page in horizontal direction */
{
ytran = -1.0 * row * (pageheight - overlap);
xtran = 0;
}
}