/* $Id: tiffcmp.c,v 1.16 2010-03-10 18:56:50 bfriesen Exp $ */

/*

* 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 "tif_config.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <math.h>

#ifdef HAVE_UNISTD_H

# include <unistd.h>

#endif

#ifdef NEED_LIBPORT

# include "libport.h"

#endif

#include "tiffio.h"

#ifndef HAVE_GETOPT

extern int getopt(int, char**, char*);

#endif

static int stopondiff = 1;

static int stoponfirsttag = 1;

static uint16 bitspersample = 1;

static uint16 samplesperpixel = 1;

static uint16 sampleformat = SAMPLEFORMAT_UINT;

static uint32 imagewidth;

static uint32 imagelength;

static void usage(void);

static int tiffcmp(TIFF*, TIFF*);

static int cmptags(TIFF*, TIFF*);

static int ContigCompare(int, uint32, unsigned char*, unsigned char*, tsize_t);

static int SeparateCompare(int, int, uint32, unsigned char*, unsigned char*);

static void PrintIntDiff(uint32, int, uint32, uint32, uint32);

static void PrintFloatDiff(uint32, int, uint32, double, double);

static void leof(const char*, uint32, int);

int

main(int argc, char* argv[])

{

TIFF *tif1, *tif2;

int c, dirnum;

extern int optind;

extern char* optarg;

while ((c = getopt(argc, argv, "ltz:")) != -1)

switch (c) {

case 'l':

stopondiff = 0;

break;

case 'z':

stopondiff = atoi(optarg);

break;

case 't':

stoponfirsttag = 0;

break;

case '?':

usage();

/*NOTREACHED*/

}

if (argc - optind < 2)

usage();

tif1 = TIFFOpen(argv[optind], "r");

if (tif1 == NULL)

return (-1);

tif2 = TIFFOpen(argv[optind+1], "r");

if (tif2 == NULL)

return (-2);

dirnum = 0;

while (tiffcmp(tif1, tif2)) {

if (!TIFFReadDirectory(tif1)) {

if (!TIFFReadDirectory(tif2))

break;

printf("No more directories for %s\n",

TIFFFileName(tif1));

return (1);

} else if (!TIFFReadDirectory(tif2)) {

printf("No more directories for %s\n",

TIFFFileName(tif2));

return (1);

}

printf("Directory %d:\n", ++dirnum);

}

TIFFClose(tif1);

TIFFClose(tif2);

return (0);

}

char* stuff[] = {

"usage: tiffcmp [options] file1 file2",

"where options are:",

" -l list each byte of image data that differs between the files",

" -z # list specified number of bytes that differs between the files",

" -t ignore any differences in directory tags",

NULL

};

static void

usage(void)

{

char buf[BUFSIZ];

int i;

setbuf(stderr, buf);

fprintf(stderr, "%s\n\n", TIFFGetVersion());

for (i = 0; stuff[i] != NULL; i++)

fprintf(stderr, "%s\n", stuff[i]);

exit(-1);

}

#define checkEOF(tif, row, sample) { \

leof(TIFFFileName(tif), row, sample); \

goto bad; \

}

static int CheckShortTag(TIFF*, TIFF*, int, char*);

static int CheckShort2Tag(TIFF*, TIFF*, int, char*);

static int CheckShortArrayTag(TIFF*, TIFF*, int, char*);

static int CheckLongTag(TIFF*, TIFF*, int, char*);

static int CheckFloatTag(TIFF*, TIFF*, int, char*);

static int CheckStringTag(TIFF*, TIFF*, int, char*);

static int

tiffcmp(TIFF* tif1, TIFF* tif2)

{

uint16 config1, config2;

tsize_t size1;

uint32 row;

tsample_t s;

unsigned char *buf1, *buf2;

if (!CheckShortTag(tif1, tif2, TIFFTAG_BITSPERSAMPLE, "BitsPerSample"))

return (0);

if (!CheckShortTag(tif1, tif2, TIFFTAG_SAMPLESPERPIXEL, "SamplesPerPixel"))

return (0);

if (!CheckLongTag(tif1, tif2, TIFFTAG_IMAGEWIDTH, "ImageWidth"))

return (0);

if (!cmptags(tif1, tif2))

return (1);

(void) TIFFGetField(tif1, TIFFTAG_BITSPERSAMPLE, &bitspersample);

(void) TIFFGetField(tif1, TIFFTAG_SAMPLESPERPIXEL, &samplesperpixel);

(void) TIFFGetField(tif1, TIFFTAG_SAMPLEFORMAT, &sampleformat);

(void) TIFFGetField(tif1, TIFFTAG_IMAGEWIDTH, &imagewidth);

(void) TIFFGetField(tif1, TIFFTAG_IMAGELENGTH, &imagelength);

(void) TIFFGetField(tif1, TIFFTAG_PLANARCONFIG, &config1);

(void) TIFFGetField(tif2, TIFFTAG_PLANARCONFIG, &config2);

buf1 = (unsigned char *)_TIFFmalloc(size1 = TIFFScanlineSize(tif1));

buf2 = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(tif2));

if (buf1 == NULL || buf2 == NULL) {

fprintf(stderr, "No space for scanline buffers\n");

exit(-1);

}

if (config1 != config2 && bitspersample != 8 && samplesperpixel > 1) {

fprintf(stderr,

"Can't handle different planar configuration w/ different bits/sample\n");

goto bad;

}

#define pack(a,b) ((a)<<8)|(b)

switch (pack(config1, config2)) {

case pack(PLANARCONFIG_SEPARATE, PLANARCONFIG_CONTIG):

for (row = 0; row < imagelength; row++) {

if (TIFFReadScanline(tif2, buf2, row, 0) < 0)

checkEOF(tif2, row, -1)

for (s = 0; s < samplesperpixel; s++) {

if (TIFFReadScanline(tif1, buf1, row, s) < 0)

checkEOF(tif1, row, s)

if (SeparateCompare(1, s, row, buf2, buf1) < 0)

goto bad1;

}

}

break;

case pack(PLANARCONFIG_CONTIG, PLANARCONFIG_SEPARATE):

for (row = 0; row < imagelength; row++) {

if (TIFFReadScanline(tif1, buf1, row, 0) < 0)

checkEOF(tif1, row, -1)

for (s = 0; s < samplesperpixel; s++) {

if (TIFFReadScanline(tif2, buf2, row, s) < 0)

checkEOF(tif2, row, s)

if (SeparateCompare(0, s, row, buf1, buf2) < 0)

goto bad1;

}

}

break;

case pack(PLANARCONFIG_SEPARATE, PLANARCONFIG_SEPARATE):

for (s = 0; s < samplesperpixel; s++)

for (row = 0; row < imagelength; row++) {

if (TIFFReadScanline(tif1, buf1, row, s) < 0)

checkEOF(tif1, row, s)

if (TIFFReadScanline(tif2, buf2, row, s) < 0)

checkEOF(tif2, row, s)

if (ContigCompare(s, row, buf1, buf2, size1) < 0)

goto bad1;

}

break;

case pack(PLANARCONFIG_CONTIG, PLANARCONFIG_CONTIG):

for (row = 0; row < imagelength; row++) {

if (TIFFReadScanline(tif1, buf1, row, 0) < 0)

checkEOF(tif1, row, -1)

if (TIFFReadScanline(tif2, buf2, row, 0) < 0)

checkEOF(tif2, row, -1)

if (ContigCompare(-1, row, buf1, buf2, size1) < 0)

goto bad1;

}

break;

}

if (buf1) _TIFFfree(buf1);

if (buf2) _TIFFfree(buf2);

return (1);

bad:

if (stopondiff)

exit(1);

bad1:

if (buf1) _TIFFfree(buf1);

if (buf2) _TIFFfree(buf2);

return (0);

}

#define CmpShortField(tag, name) \

if (!CheckShortTag(tif1, tif2, tag, name) && stoponfirsttag) return (0)

#define CmpShortField2(tag, name) \

if (!CheckShort2Tag(tif1, tif2, tag, name) && stoponfirsttag) return (0)

#define CmpLongField(tag, name) \

if (!CheckLongTag(tif1, tif2, tag, name) && stoponfirsttag) return (0)

#define CmpFloatField(tag, name) \

if (!CheckFloatTag(tif1, tif2, tag, name) && stoponfirsttag) return (0)

#define CmpStringField(tag, name) \

if (!CheckStringTag(tif1, tif2, tag, name) && stoponfirsttag) return (0)

#define CmpShortArrayField(tag, name) \

if (!CheckShortArrayTag(tif1, tif2, tag, name) && stoponfirsttag) return (0)

static int

cmptags(TIFF* tif1, TIFF* tif2)

{

CmpLongField(TIFFTAG_SUBFILETYPE, "SubFileType");

CmpLongField(TIFFTAG_IMAGEWIDTH, "ImageWidth");

CmpLongField(TIFFTAG_IMAGELENGTH, "ImageLength");

CmpShortField(TIFFTAG_BITSPERSAMPLE, "BitsPerSample");

CmpShortField(TIFFTAG_COMPRESSION, "Compression");

CmpShortField(TIFFTAG_PREDICTOR, "Predictor");

CmpShortField(TIFFTAG_PHOTOMETRIC, "PhotometricInterpretation");

CmpShortField(TIFFTAG_THRESHHOLDING, "Thresholding");

CmpShortField(TIFFTAG_FILLORDER, "FillOrder");

CmpShortField(TIFFTAG_ORIENTATION, "Orientation");

CmpShortField(TIFFTAG_SAMPLESPERPIXEL, "SamplesPerPixel");

CmpShortField(TIFFTAG_MINSAMPLEVALUE, "MinSampleValue");

CmpShortField(TIFFTAG_MAXSAMPLEVALUE, "MaxSampleValue");

CmpShortField(TIFFTAG_SAMPLEFORMAT, "SampleFormat");

CmpFloatField(TIFFTAG_XRESOLUTION, "XResolution");

CmpFloatField(TIFFTAG_YRESOLUTION, "YResolution");

CmpLongField(TIFFTAG_GROUP3OPTIONS, "Group3Options");

CmpLongField(TIFFTAG_GROUP4OPTIONS, "Group4Options");

CmpShortField(TIFFTAG_RESOLUTIONUNIT, "ResolutionUnit");

CmpShortField(TIFFTAG_PLANARCONFIG, "PlanarConfiguration");

CmpLongField(TIFFTAG_ROWSPERSTRIP, "RowsPerStrip");

CmpFloatField(TIFFTAG_XPOSITION, "XPosition");

CmpFloatField(TIFFTAG_YPOSITION, "YPosition");

CmpShortField(TIFFTAG_GRAYRESPONSEUNIT, "GrayResponseUnit");

CmpShortField(TIFFTAG_COLORRESPONSEUNIT, "ColorResponseUnit");

#ifdef notdef

{ uint16 *graycurve;

CmpField(TIFFTAG_GRAYRESPONSECURVE, graycurve);

}

{ uint16 *red, *green, *blue;

CmpField3(TIFFTAG_COLORRESPONSECURVE, red, green, blue);

}

{ uint16 *red, *green, *blue;

CmpField3(TIFFTAG_COLORMAP, red, green, blue);

}

#endif

CmpShortField2(TIFFTAG_PAGENUMBER, "PageNumber");

CmpStringField(TIFFTAG_ARTIST, "Artist");

CmpStringField(TIFFTAG_IMAGEDESCRIPTION,"ImageDescription");

CmpStringField(TIFFTAG_MAKE, "Make");

CmpStringField(TIFFTAG_MODEL, "Model");

CmpStringField(TIFFTAG_SOFTWARE, "Software");

CmpStringField(TIFFTAG_DATETIME, "DateTime");

CmpStringField(TIFFTAG_HOSTCOMPUTER, "HostComputer");

CmpStringField(TIFFTAG_PAGENAME, "PageName");

CmpStringField(TIFFTAG_DOCUMENTNAME, "DocumentName");

CmpShortField(TIFFTAG_MATTEING, "Matteing");

CmpShortArrayField(TIFFTAG_EXTRASAMPLES,"ExtraSamples");

return (1);

}

static int

ContigCompare(int sample, uint32 row,

unsigned char* p1, unsigned char* p2, tsize_t size)

{

uint32 pix;

int ppb = 8 / bitspersample;

int samples_to_test;

if (memcmp(p1, p2, size) == 0)

return 0;

samples_to_test = (sample == -1) ? samplesperpixel : 1;

switch (bitspersample) {

case 1: case 2: case 4: case 8:

{

unsigned char *pix1 = p1, *pix2 = p2;

for (pix = 0; pix < imagewidth; pix += ppb) {

int s;

for(s = 0; s < samples_to_test; s++) {

if (*pix1 != *pix2) {

if( sample == -1 )

PrintIntDiff(row, s, pix, *pix1, *pix2);

else

PrintIntDiff(row, sample, pix, *pix1, *pix2);

}

pix1++;

pix2++;

}

}

break;

}

case 16:

{

uint16 *pix1 = (uint16 *)p1, *pix2 = (uint16 *)p2;

for (pix = 0; pix < imagewidth; pix++) {

int s;

for(s = 0; s < samples_to_test; s++) {

if (*pix1 != *pix2)

PrintIntDiff(row, sample, pix, *pix1, *pix2);

pix1++;

pix2++;

}

}

break;

}

case 32:

if (sampleformat == SAMPLEFORMAT_UINT

|| sampleformat == SAMPLEFORMAT_INT) {

uint32 *pix1 = (uint32 *)p1, *pix2 = (uint32 *)p2;

for (pix = 0; pix < imagewidth; pix++) {

int s;

for(s = 0; s < samples_to_test; s++) {

if (*pix1 != *pix2) {

PrintIntDiff(row, sample, pix,

*pix1, *pix2);

}

pix1++;

pix2++;

}

}

} else if (sampleformat == SAMPLEFORMAT_IEEEFP) {

float *pix1 = (float *)p1, *pix2 = (float *)p2;

for (pix = 0; pix < imagewidth; pix++) {

int s;

for(s = 0; s < samples_to_test; s++) {

if (fabs(*pix1 - *pix2) < 0.000000000001) {

PrintFloatDiff(row, sample, pix,

*pix1, *pix2);

}

pix1++;

pix2++;

}

}

} else {

fprintf(stderr, "Sample format %d is not supported.\n",

sampleformat);

return -1;

}

break;

default:

fprintf(stderr, "Bit depth %d is not supported.\n", bitspersample);

return -1;

}

return 0;

}

static void

PrintIntDiff(uint32 row, int sample, uint32 pix, uint32 w1, uint32 w2)

{

if (sample < 0)

sample = 0;

switch (bitspersample) {

case 1:

case 2:

case 4:

{

int32 mask1, mask2, s;

mask1 = ~((-1) << bitspersample);

s = (8 - bitspersample);

mask2 = mask1 << s;

for (; mask2 && pix < imagewidth;

mask2 >>= bitspersample, s -= bitspersample, pix++) {

if ((w1 & mask2) ^ (w2 & mask2)) {

printf(

"Scanline %lu, pixel %lu, sample %d: %01x %01x\n",

(unsigned long) row,

(unsigned long) pix,

sample,

(unsigned int)((w1 >> s) & mask1),

(unsigned int)((w2 >> s) & mask1));

if (--stopondiff == 0)

exit(1);

}

}

break;

}

case 8:

printf("Scanline %lu, pixel %lu, sample %d: %02x %02x\n",

(unsigned long) row, (unsigned long) pix, sample,

(unsigned int) w1, (unsigned int) w2);

if (--stopondiff == 0)

exit(1);

break;

case 16:

printf("Scanline %lu, pixel %lu, sample %d: %04x %04x\n",

(unsigned long) row, (unsigned long) pix, sample,

(unsigned int) w1, (unsigned int) w2);

if (--stopondiff == 0)

exit(1);

break;

case 32:

printf("Scanline %lu, pixel %lu, sample %d: %08x %08x\n",

(unsigned long) row, (unsigned long) pix, sample,

(unsigned int) w1, (unsigned int) w2);

if (--stopondiff == 0)

exit(1);

break;

default:

break;

}

}

static void

PrintFloatDiff(uint32 row, int sample, uint32 pix, double w1, double w2)

{

if (sample < 0)

sample = 0;

switch (bitspersample) {

case 32:

printf("Scanline %lu, pixel %lu, sample %d: %g %g\n",

(long) row, (long) pix, sample, w1, w2);

if (--stopondiff == 0)

exit(1);

break;

default:

break;

}

}

static int

SeparateCompare(int reversed, int sample, uint32 row,

unsigned char* cp1, unsigned char* p2)

{

uint32 npixels = imagewidth;

int pixel;

cp1 += sample;

for (pixel = 0; npixels-- > 0; pixel++, cp1 += samplesperpixel, p2++) {

if (*cp1 != *p2) {

printf("Scanline %lu, pixel %lu, sample %ld: ",

(long) row, (long) pixel, (long) sample);

if (reversed)

printf("%02x %02x\n", *p2, *cp1);

else

printf("%02x %02x\n", *cp1, *p2);

if (--stopondiff == 0)

exit(1);

}

}

return 0;

}

static int

checkTag(TIFF* tif1, TIFF* tif2, int tag, char* name, void* p1, void* p2)

{

if (TIFFGetField(tif1, tag, p1)) {

if (!TIFFGetField(tif2, tag, p2)) {

printf("%s tag appears only in %s\n",

name, TIFFFileName(tif1));

return (0);

}

return (1);

} else if (TIFFGetField(tif2, tag, p2)) {

printf("%s tag appears only in %s\n", name, TIFFFileName(tif2));

return (0);

}

return (-1);

}

#define CHECK(cmp, fmt) { \

switch (checkTag(tif1,tif2,tag,name,&v1,&v2)) { \

case 1: if (cmp) \

case -1: return (1); \

printf(fmt, name, v1, v2); \

} \

return (0); \

}

static int

CheckShortTag(TIFF* tif1, TIFF* tif2, int tag, char* name)

{

uint16 v1, v2;

CHECK(v1 == v2, "%s: %u %u\n");

}

static int

CheckShort2Tag(TIFF* tif1, TIFF* tif2, int tag, char* name)

{

uint16 v11, v12, v21, v22;

if (TIFFGetField(tif1, tag, &v11, &v12)) {

if (!TIFFGetField(tif2, tag, &v21, &v22)) {

printf("%s tag appears only in %s\n",

name, TIFFFileName(tif1));

return (0);

}

if (v11 == v21 && v12 == v22)

return (1);

printf("%s: <%u,%u> <%u,%u>\n", name, v11, v12, v21, v22);

} else if (TIFFGetField(tif2, tag, &v21, &v22))

printf("%s tag appears only in %s\n", name, TIFFFileName(tif2));

else

return (1);

return (0);

}

static int

CheckShortArrayTag(TIFF* tif1, TIFF* tif2, int tag, char* name)

{

uint16 n1, *a1;

uint16 n2, *a2;

if (TIFFGetField(tif1, tag, &n1, &a1)) {

if (!TIFFGetField(tif2, tag, &n2, &a2)) {

printf("%s tag appears only in %s\n",

name, TIFFFileName(tif1));

return (0);

}

if (n1 == n2) {

char* sep;

uint16 i;

if (memcmp(a1, a2, n1 * sizeof(uint16)) == 0)

return (1);

printf("%s: value mismatch, <%u:", name, n1);

sep = "";

for (i = 0; i < n1; i++)

printf("%s%u", sep, a1[i]), sep = ",";

printf("> and <%u: ", n2);

sep = "";

for (i = 0; i < n2; i++)

printf("%s%u", sep, a2[i]), sep = ",";

printf(">\n");

} else

printf("%s: %u items in %s, %u items in %s", name,

n1, TIFFFileName(tif1),

n2, TIFFFileName(tif2)

);

} else if (TIFFGetField(tif2, tag, &n2, &a2))

printf("%s tag appears only in %s\n", name, TIFFFileName(tif2));

else

return (1);

return (0);

}

static int

CheckLongTag(TIFF* tif1, TIFF* tif2, int tag, char* name)

{

uint32 v1, v2;

CHECK(v1 == v2, "%s: %u %u\n");

}

static int

CheckFloatTag(TIFF* tif1, TIFF* tif2, int tag, char* name)

{

float v1, v2;

CHECK(v1 == v2, "%s: %g %g\n");

}

static int

CheckStringTag(TIFF* tif1, TIFF* tif2, int tag, char* name)

{

char *v1, *v2;

CHECK(strcmp(v1, v2) == 0, "%s: \"%s\" \"%s\"\n");

}

static void

leof(const char* name, uint32 row, int s)

{

printf("%s: EOF at scanline %lu", name, (unsigned long)row);

if (s >= 0)

printf(", sample %d", s);

printf("\n");

}

/* vim: set ts=8 sts=8 sw=8 noet: */

/*

* Local Variables:

* mode: c

* c-basic-offset: 8

* fill-column: 78

* End:

*/