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opencv/3rdparty/libtiff/tif_dir.c

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/* $Id: tif_dir.c,v 1.108 2012-02-01 01:51:00 fwarmerdam 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.
*/
/*
* TIFF Library.
*
* Directory Tag Get & Set Routines.
* (and also some miscellaneous stuff)
*/
#include "tiffiop.h"
/*
* These are used in the backwards compatibility code...
*/
#define DATATYPE_VOID 0 /* !untyped data */
#define DATATYPE_INT 1 /* !signed integer data */
#define DATATYPE_UINT 2 /* !unsigned integer data */
#define DATATYPE_IEEEFP 3 /* !IEEE floating point data */
static void
setByteArray(void** vpp, void* vp, size_t nmemb, size_t elem_size)
{
if (*vpp)
_TIFFfree(*vpp), *vpp = 0;
if (vp) {
tmsize_t bytes = (tmsize_t)(nmemb * elem_size);
if (elem_size && bytes / elem_size == nmemb)
*vpp = (void*) _TIFFmalloc(bytes);
if (*vpp)
_TIFFmemcpy(*vpp, vp, bytes);
}
}
void _TIFFsetByteArray(void** vpp, void* vp, uint32 n)
{ setByteArray(vpp, vp, n, 1); }
void _TIFFsetString(char** cpp, char* cp)
{ setByteArray((void**) cpp, (void*) cp, strlen(cp)+1, 1); }
void _TIFFsetNString(char** cpp, char* cp, uint32 n)
{ setByteArray((void**) cpp, (void*) cp, n, 1); }
void _TIFFsetShortArray(uint16** wpp, uint16* wp, uint32 n)
{ setByteArray((void**) wpp, (void*) wp, n, sizeof (uint16)); }
void _TIFFsetLongArray(uint32** lpp, uint32* lp, uint32 n)
{ setByteArray((void**) lpp, (void*) lp, n, sizeof (uint32)); }
void _TIFFsetLong8Array(uint64** lpp, uint64* lp, uint32 n)
{ setByteArray((void**) lpp, (void*) lp, n, sizeof (uint64)); }
void _TIFFsetFloatArray(float** fpp, float* fp, uint32 n)
{ setByteArray((void**) fpp, (void*) fp, n, sizeof (float)); }
void _TIFFsetDoubleArray(double** dpp, double* dp, uint32 n)
{ setByteArray((void**) dpp, (void*) dp, n, sizeof (double)); }
static void
setDoubleArrayOneValue(double** vpp, double value, size_t nmemb)
{
if (*vpp)
_TIFFfree(*vpp);
*vpp = _TIFFmalloc(nmemb*sizeof(double));
if (*vpp)
{
while (nmemb--)
((double*)*vpp)[nmemb] = value;
}
}
/*
* Install extra samples information.
*/
static int
setExtraSamples(TIFFDirectory* td, va_list ap, uint32* v)
{
/* XXX: Unassociated alpha data == 999 is a known Corel Draw bug, see below */
#define EXTRASAMPLE_COREL_UNASSALPHA 999
uint16* va;
uint32 i;
*v = (uint16) va_arg(ap, uint16_vap);
if ((uint16) *v > td->td_samplesperpixel)
return 0;
va = va_arg(ap, uint16*);
if (*v > 0 && va == NULL) /* typically missing param */
return 0;
for (i = 0; i < *v; i++) {
if (va[i] > EXTRASAMPLE_UNASSALPHA) {
/*
* XXX: Corel Draw is known to produce incorrect
* ExtraSamples tags which must be patched here if we
* want to be able to open some of the damaged TIFF
* files:
*/
if (va[i] == EXTRASAMPLE_COREL_UNASSALPHA)
va[i] = EXTRASAMPLE_UNASSALPHA;
else
return 0;
}
}
td->td_extrasamples = (uint16) *v;
_TIFFsetShortArray(&td->td_sampleinfo, va, td->td_extrasamples);
return 1;
#undef EXTRASAMPLE_COREL_UNASSALPHA
}
static uint32
checkInkNamesString(TIFF* tif, uint32 slen, const char* s)
{
TIFFDirectory* td = &tif->tif_dir;
uint16 i = td->td_samplesperpixel;
if (slen > 0) {
const char* ep = s+slen;
const char* cp = s;
for (; i > 0; i--) {
for (; *cp != '\0'; cp++)
if (cp >= ep)
goto bad;
cp++; /* skip \0 */
}
return ((uint32)(cp-s));
}
bad:
TIFFErrorExt(tif->tif_clientdata, "TIFFSetField",
"%s: Invalid InkNames value; expecting %d names, found %d",
tif->tif_name,
td->td_samplesperpixel,
td->td_samplesperpixel-i);
return (0);
}
static int
_TIFFVSetField(TIFF* tif, uint32 tag, va_list ap)
{
static const char module[] = "_TIFFVSetField";
TIFFDirectory* td = &tif->tif_dir;
int status = 1;
uint32 v32, i, v;
char* s;
switch (tag) {
case TIFFTAG_SUBFILETYPE:
td->td_subfiletype = (uint32) va_arg(ap, uint32);
break;
case TIFFTAG_IMAGEWIDTH:
td->td_imagewidth = (uint32) va_arg(ap, uint32);
break;
case TIFFTAG_IMAGELENGTH:
td->td_imagelength = (uint32) va_arg(ap, uint32);
break;
case TIFFTAG_BITSPERSAMPLE:
td->td_bitspersample = (uint16) va_arg(ap, uint16_vap);
/*
* If the data require post-decoding processing to byte-swap
* samples, set it up here. Note that since tags are required
* to be ordered, compression code can override this behaviour
* in the setup method if it wants to roll the post decoding
* work in with its normal work.
*/
if (tif->tif_flags & TIFF_SWAB) {
if (td->td_bitspersample == 8)
tif->tif_postdecode = _TIFFNoPostDecode;
else if (td->td_bitspersample == 16)
tif->tif_postdecode = _TIFFSwab16BitData;
else if (td->td_bitspersample == 24)
tif->tif_postdecode = _TIFFSwab24BitData;
else if (td->td_bitspersample == 32)
tif->tif_postdecode = _TIFFSwab32BitData;
else if (td->td_bitspersample == 64)
tif->tif_postdecode = _TIFFSwab64BitData;
else if (td->td_bitspersample == 128) /* two 64's */
tif->tif_postdecode = _TIFFSwab64BitData;
}
break;
case TIFFTAG_COMPRESSION:
v = (uint16) va_arg(ap, uint16_vap);
/*
* If we're changing the compression scheme, the notify the
* previous module so that it can cleanup any state it's
* setup.
*/
if (TIFFFieldSet(tif, FIELD_COMPRESSION)) {
if ((uint32)td->td_compression == v)
break;
(*tif->tif_cleanup)(tif);
tif->tif_flags &= ~TIFF_CODERSETUP;
}
/*
* Setup new compression routine state.
*/
if( (status = TIFFSetCompressionScheme(tif, v)) != 0 )
td->td_compression = (uint16) v;
else
status = 0;
break;
case TIFFTAG_PHOTOMETRIC:
td->td_photometric = (uint16) va_arg(ap, uint16_vap);
break;
case TIFFTAG_THRESHHOLDING:
td->td_threshholding = (uint16) va_arg(ap, uint16_vap);
break;
case TIFFTAG_FILLORDER:
v = (uint16) va_arg(ap, uint16_vap);
if (v != FILLORDER_LSB2MSB && v != FILLORDER_MSB2LSB)
goto badvalue;
td->td_fillorder = (uint16) v;
break;
case TIFFTAG_ORIENTATION:
v = (uint16) va_arg(ap, uint16_vap);
if (v < ORIENTATION_TOPLEFT || ORIENTATION_LEFTBOT < v)
goto badvalue;
else
td->td_orientation = (uint16) v;
break;
case TIFFTAG_SAMPLESPERPIXEL:
v = (uint16) va_arg(ap, uint16_vap);
if (v == 0)
goto badvalue;
td->td_samplesperpixel = (uint16) v;
break;
case TIFFTAG_ROWSPERSTRIP:
v32 = (uint32) va_arg(ap, uint32);
if (v32 == 0)
goto badvalue32;
td->td_rowsperstrip = v32;
if (!TIFFFieldSet(tif, FIELD_TILEDIMENSIONS)) {
td->td_tilelength = v32;
td->td_tilewidth = td->td_imagewidth;
}
break;
case TIFFTAG_MINSAMPLEVALUE:
td->td_minsamplevalue = (uint16) va_arg(ap, uint16_vap);
break;
case TIFFTAG_MAXSAMPLEVALUE:
td->td_maxsamplevalue = (uint16) va_arg(ap, uint16_vap);
break;
case TIFFTAG_SMINSAMPLEVALUE:
if (tif->tif_flags & TIFF_PERSAMPLE)
_TIFFsetDoubleArray(&td->td_sminsamplevalue, va_arg(ap, double*), td->td_samplesperpixel);
else
setDoubleArrayOneValue(&td->td_sminsamplevalue, va_arg(ap, double), td->td_samplesperpixel);
break;
case TIFFTAG_SMAXSAMPLEVALUE:
if (tif->tif_flags & TIFF_PERSAMPLE)
_TIFFsetDoubleArray(&td->td_smaxsamplevalue, va_arg(ap, double*), td->td_samplesperpixel);
else
setDoubleArrayOneValue(&td->td_smaxsamplevalue, va_arg(ap, double), td->td_samplesperpixel);
break;
case TIFFTAG_XRESOLUTION:
td->td_xresolution = (float) va_arg(ap, double);
break;
case TIFFTAG_YRESOLUTION:
td->td_yresolution = (float) va_arg(ap, double);
break;
case TIFFTAG_PLANARCONFIG:
v = (uint16) va_arg(ap, uint16_vap);
if (v != PLANARCONFIG_CONTIG && v != PLANARCONFIG_SEPARATE)
goto badvalue;
td->td_planarconfig = (uint16) v;
break;
case TIFFTAG_XPOSITION:
td->td_xposition = (float) va_arg(ap, double);
break;
case TIFFTAG_YPOSITION:
td->td_yposition = (float) va_arg(ap, double);
break;
case TIFFTAG_RESOLUTIONUNIT:
v = (uint16) va_arg(ap, uint16_vap);
if (v < RESUNIT_NONE || RESUNIT_CENTIMETER < v)
goto badvalue;
td->td_resolutionunit = (uint16) v;
break;
case TIFFTAG_PAGENUMBER:
td->td_pagenumber[0] = (uint16) va_arg(ap, uint16_vap);
td->td_pagenumber[1] = (uint16) va_arg(ap, uint16_vap);
break;
case TIFFTAG_HALFTONEHINTS:
td->td_halftonehints[0] = (uint16) va_arg(ap, uint16_vap);
td->td_halftonehints[1] = (uint16) va_arg(ap, uint16_vap);
break;
case TIFFTAG_COLORMAP:
v32 = (uint32)(1L<<td->td_bitspersample);
_TIFFsetShortArray(&td->td_colormap[0], va_arg(ap, uint16*), v32);
_TIFFsetShortArray(&td->td_colormap[1], va_arg(ap, uint16*), v32);
_TIFFsetShortArray(&td->td_colormap[2], va_arg(ap, uint16*), v32);
break;
case TIFFTAG_EXTRASAMPLES:
if (!setExtraSamples(td, ap, &v))
goto badvalue;
break;
case TIFFTAG_MATTEING:
td->td_extrasamples = (((uint16) va_arg(ap, uint16_vap)) != 0);
if (td->td_extrasamples) {
uint16 sv = EXTRASAMPLE_ASSOCALPHA;
_TIFFsetShortArray(&td->td_sampleinfo, &sv, 1);
}
break;
case TIFFTAG_TILEWIDTH:
v32 = (uint32) va_arg(ap, uint32);
if (v32 % 16) {
if (tif->tif_mode != O_RDONLY)
goto badvalue32;
TIFFWarningExt(tif->tif_clientdata, tif->tif_name,
"Nonstandard tile width %d, convert file", v32);
}
td->td_tilewidth = v32;
tif->tif_flags |= TIFF_ISTILED;
break;
case TIFFTAG_TILELENGTH:
v32 = (uint32) va_arg(ap, uint32);
if (v32 % 16) {
if (tif->tif_mode != O_RDONLY)
goto badvalue32;
TIFFWarningExt(tif->tif_clientdata, tif->tif_name,
"Nonstandard tile length %d, convert file", v32);
}
td->td_tilelength = v32;
tif->tif_flags |= TIFF_ISTILED;
break;
case TIFFTAG_TILEDEPTH:
v32 = (uint32) va_arg(ap, uint32);
if (v32 == 0)
goto badvalue32;
td->td_tiledepth = v32;
break;
case TIFFTAG_DATATYPE:
v = (uint16) va_arg(ap, uint16_vap);
switch (v) {
case DATATYPE_VOID: v = SAMPLEFORMAT_VOID; break;
case DATATYPE_INT: v = SAMPLEFORMAT_INT; break;
case DATATYPE_UINT: v = SAMPLEFORMAT_UINT; break;
case DATATYPE_IEEEFP: v = SAMPLEFORMAT_IEEEFP;break;
default: goto badvalue;
}
td->td_sampleformat = (uint16) v;
break;
case TIFFTAG_SAMPLEFORMAT:
v = (uint16) va_arg(ap, uint16_vap);
if (v < SAMPLEFORMAT_UINT || SAMPLEFORMAT_COMPLEXIEEEFP < v)
goto badvalue;
td->td_sampleformat = (uint16) v;
/* Try to fix up the SWAB function for complex data. */
if( td->td_sampleformat == SAMPLEFORMAT_COMPLEXINT
&& td->td_bitspersample == 32
&& tif->tif_postdecode == _TIFFSwab32BitData )
tif->tif_postdecode = _TIFFSwab16BitData;
else if( (td->td_sampleformat == SAMPLEFORMAT_COMPLEXINT
|| td->td_sampleformat == SAMPLEFORMAT_COMPLEXIEEEFP)
&& td->td_bitspersample == 64
&& tif->tif_postdecode == _TIFFSwab64BitData )
tif->tif_postdecode = _TIFFSwab32BitData;
break;
case TIFFTAG_IMAGEDEPTH:
td->td_imagedepth = (uint32) va_arg(ap, uint32);
break;
case TIFFTAG_SUBIFD:
if ((tif->tif_flags & TIFF_INSUBIFD) == 0) {
td->td_nsubifd = (uint16) va_arg(ap, uint16_vap);
_TIFFsetLong8Array(&td->td_subifd, (uint64*) va_arg(ap, uint64*),
(long) td->td_nsubifd);
} else {
TIFFErrorExt(tif->tif_clientdata, module,
"%s: Sorry, cannot nest SubIFDs",
tif->tif_name);
status = 0;
}
break;
case TIFFTAG_YCBCRPOSITIONING:
td->td_ycbcrpositioning = (uint16) va_arg(ap, uint16_vap);
break;
case TIFFTAG_YCBCRSUBSAMPLING:
td->td_ycbcrsubsampling[0] = (uint16) va_arg(ap, uint16_vap);
td->td_ycbcrsubsampling[1] = (uint16) va_arg(ap, uint16_vap);
break;
case TIFFTAG_TRANSFERFUNCTION:
v = (td->td_samplesperpixel - td->td_extrasamples) > 1 ? 3 : 1;
for (i = 0; i < v; i++)
_TIFFsetShortArray(&td->td_transferfunction[i],
va_arg(ap, uint16*), 1L<<td->td_bitspersample);
break;
case TIFFTAG_REFERENCEBLACKWHITE:
/* XXX should check for null range */
_TIFFsetFloatArray(&td->td_refblackwhite, va_arg(ap, float*), 6);
break;
case TIFFTAG_INKNAMES:
v = (uint16) va_arg(ap, uint16_vap);
s = va_arg(ap, char*);
v = checkInkNamesString(tif, v, s);
status = v > 0;
if( v > 0 ) {
_TIFFsetNString(&td->td_inknames, s, v);
td->td_inknameslen = v;
}
break;
case TIFFTAG_PERSAMPLE:
v = (uint16) va_arg(ap, uint16_vap);
if( v == PERSAMPLE_MULTI )
tif->tif_flags |= TIFF_PERSAMPLE;
else
tif->tif_flags &= ~TIFF_PERSAMPLE;
break;
default: {
TIFFTagValue *tv;
int tv_size, iCustom;
const TIFFField *fip = TIFFFindField(tif, tag, TIFF_ANY);
/*
* This can happen if multiple images are open with different
* codecs which have private tags. The global tag information
* table may then have tags that are valid for one file but not
* the other. If the client tries to set a tag that is not valid
* for the image's codec then we'll arrive here. This
* happens, for example, when tiffcp is used to convert between
* compression schemes and codec-specific tags are blindly copied.
*/
if(fip == NULL || fip->field_bit != FIELD_CUSTOM) {
TIFFErrorExt(tif->tif_clientdata, module,
"%s: Invalid %stag \"%s\" (not supported by codec)",
tif->tif_name, isPseudoTag(tag) ? "pseudo-" : "",
fip ? fip->field_name : "Unknown");
status = 0;
break;
}
/*
* Find the existing entry for this custom value.
*/
tv = NULL;
for (iCustom = 0; iCustom < td->td_customValueCount; iCustom++) {
if (td->td_customValues[iCustom].info->field_tag == tag) {
tv = td->td_customValues + iCustom;
if (tv->value != NULL) {
_TIFFfree(tv->value);
tv->value = NULL;
}
break;
}
}
/*
* Grow the custom list if the entry was not found.
*/
if(tv == NULL) {
TIFFTagValue *new_customValues;
td->td_customValueCount++;
new_customValues = (TIFFTagValue *)
_TIFFrealloc(td->td_customValues,
sizeof(TIFFTagValue) * td->td_customValueCount);
if (!new_customValues) {
TIFFErrorExt(tif->tif_clientdata, module,
"%s: Failed to allocate space for list of custom values",
tif->tif_name);
status = 0;
goto end;
}
td->td_customValues = new_customValues;
tv = td->td_customValues + (td->td_customValueCount - 1);
tv->info = fip;
tv->value = NULL;
tv->count = 0;
}
/*
* Set custom value ... save a copy of the custom tag value.
*/
tv_size = _TIFFDataSize(fip->field_type);
if (tv_size == 0) {
status = 0;
TIFFErrorExt(tif->tif_clientdata, module,
"%s: Bad field type %d for \"%s\"",
tif->tif_name, fip->field_type,
fip->field_name);
goto end;
}
if (fip->field_type == TIFF_ASCII)
{
uint32 ma;
char* mb;
if (fip->field_passcount)
{
assert(fip->field_writecount==TIFF_VARIABLE2);
ma=(uint32)va_arg(ap,uint32);
mb=(char*)va_arg(ap,char*);
}
else
{
mb=(char*)va_arg(ap,char*);
ma=(uint32)(strlen(mb)+1);
}
tv->count=ma;
setByteArray(&tv->value,mb,ma,1);
}
else
{
if (fip->field_passcount) {
if (fip->field_writecount == TIFF_VARIABLE2)
tv->count = (uint32) va_arg(ap, uint32);
else
tv->count = (int) va_arg(ap, int);
} else if (fip->field_writecount == TIFF_VARIABLE
|| fip->field_writecount == TIFF_VARIABLE2)
tv->count = 1;
else if (fip->field_writecount == TIFF_SPP)
tv->count = td->td_samplesperpixel;
else
tv->count = fip->field_writecount;
if (tv->count == 0) {
status = 0;
TIFFErrorExt(tif->tif_clientdata, module,
"%s: Null count for \"%s\" (type "
"%d, writecount %d, passcount %d)",
tif->tif_name,
fip->field_name,
fip->field_type,
fip->field_writecount,
fip->field_passcount);
goto end;
}
tv->value = _TIFFCheckMalloc(tif, tv->count, tv_size,
"custom tag binary object");
if (!tv->value) {
status = 0;
goto end;
}
if ((fip->field_passcount
|| fip->field_writecount == TIFF_VARIABLE
|| fip->field_writecount == TIFF_VARIABLE2
|| fip->field_writecount == TIFF_SPP
|| tv->count > 1)
&& fip->field_tag != TIFFTAG_PAGENUMBER
&& fip->field_tag != TIFFTAG_HALFTONEHINTS
&& fip->field_tag != TIFFTAG_YCBCRSUBSAMPLING
&& fip->field_tag != TIFFTAG_DOTRANGE) {
_TIFFmemcpy(tv->value, va_arg(ap, void *),
tv->count * tv_size);
} else {
/*
* XXX: The following loop required to handle
* TIFFTAG_PAGENUMBER, TIFFTAG_HALFTONEHINTS,
* TIFFTAG_YCBCRSUBSAMPLING and TIFFTAG_DOTRANGE tags.
* These tags are actually arrays and should be passed as
* array pointers to TIFFSetField() function, but actually
* passed as a list of separate values. This behaviour
* must be changed in the future!
*/
int i;
char *val = (char *)tv->value;
for (i = 0; i < tv->count; i++, val += tv_size) {
switch (fip->field_type) {
case TIFF_BYTE:
case TIFF_UNDEFINED:
{
uint8 v = (uint8)va_arg(ap, int);
_TIFFmemcpy(val, &v, tv_size);
}
break;
case TIFF_SBYTE:
{
int8 v = (int8)va_arg(ap, int);
_TIFFmemcpy(val, &v, tv_size);
}
break;
case TIFF_SHORT:
{
uint16 v = (uint16)va_arg(ap, int);
_TIFFmemcpy(val, &v, tv_size);
}
break;
case TIFF_SSHORT:
{
int16 v = (int16)va_arg(ap, int);
_TIFFmemcpy(val, &v, tv_size);
}
break;
case TIFF_LONG:
case TIFF_IFD:
{
uint32 v = va_arg(ap, uint32);
_TIFFmemcpy(val, &v, tv_size);
}
break;
case TIFF_SLONG:
{
int32 v = va_arg(ap, int32);
_TIFFmemcpy(val, &v, tv_size);
}
break;
case TIFF_LONG8:
case TIFF_IFD8:
{
uint64 v = va_arg(ap, uint64);
_TIFFmemcpy(val, &v, tv_size);
}
break;
case TIFF_SLONG8:
{
int64 v = va_arg(ap, int64);
_TIFFmemcpy(val, &v, tv_size);
}
break;
case TIFF_RATIONAL:
case TIFF_SRATIONAL:
case TIFF_FLOAT:
{
float v = (float)va_arg(ap, double);
_TIFFmemcpy(val, &v, tv_size);
}
break;
case TIFF_DOUBLE:
{
double v = va_arg(ap, double);
_TIFFmemcpy(val, &v, tv_size);
}
break;
default:
_TIFFmemset(val, 0, tv_size);
status = 0;
break;
}
}
}
}
}
}
if (status) {
const TIFFField* fip=TIFFFieldWithTag(tif,tag);
if (fip)
TIFFSetFieldBit(tif, fip->field_bit);
tif->tif_flags |= TIFF_DIRTYDIRECT;
}
end:
va_end(ap);
return (status);
badvalue:
{
const TIFFField* fip=TIFFFieldWithTag(tif,tag);
TIFFErrorExt(tif->tif_clientdata, module,
"%s: Bad value %u for \"%s\" tag",
tif->tif_name, v,
fip ? fip->field_name : "Unknown");
va_end(ap);
}
return (0);
badvalue32:
{
const TIFFField* fip=TIFFFieldWithTag(tif,tag);
TIFFErrorExt(tif->tif_clientdata, module,
"%s: Bad value %u for \"%s\" tag",
tif->tif_name, v32,
fip ? fip->field_name : "Unknown");
va_end(ap);
}
return (0);
}
/*
* Return 1/0 according to whether or not
* it is permissible to set the tag's value.
* Note that we allow ImageLength to be changed
* so that we can append and extend to images.
* Any other tag may not be altered once writing
* has commenced, unless its value has no effect
* on the format of the data that is written.
*/
static int
OkToChangeTag(TIFF* tif, uint32 tag)
{
const TIFFField* fip = TIFFFindField(tif, tag, TIFF_ANY);
if (!fip) { /* unknown tag */
TIFFErrorExt(tif->tif_clientdata, "TIFFSetField", "%s: Unknown %stag %u",
tif->tif_name, isPseudoTag(tag) ? "pseudo-" : "", tag);
return (0);
}
if (tag != TIFFTAG_IMAGELENGTH && (tif->tif_flags & TIFF_BEENWRITING) &&
!fip->field_oktochange) {
/*
* Consult info table to see if tag can be changed
* after we've started writing. We only allow changes
* to those tags that don't/shouldn't affect the
* compression and/or format of the data.
*/
TIFFErrorExt(tif->tif_clientdata, "TIFFSetField",
"%s: Cannot modify tag \"%s\" while writing",
tif->tif_name, fip->field_name);
return (0);
}
return (1);
}
/*
* Record the value of a field in the
* internal directory structure. The
* field will be written to the file
* when/if the directory structure is
* updated.
*/
int
TIFFSetField(TIFF* tif, uint32 tag, ...)
{
va_list ap;
int status;
va_start(ap, tag);
status = TIFFVSetField(tif, tag, ap);
va_end(ap);
return (status);
}
/*
* Clear the contents of the field in the internal structure.
*/
int
TIFFUnsetField(TIFF* tif, uint32 tag)
{
const TIFFField *fip = TIFFFieldWithTag(tif, tag);
TIFFDirectory* td = &tif->tif_dir;
if( !fip )
return 0;
if( fip->field_bit != FIELD_CUSTOM )
TIFFClrFieldBit(tif, fip->field_bit);
else
{
TIFFTagValue *tv = NULL;
int i;
for (i = 0; i < td->td_customValueCount; i++) {
tv = td->td_customValues + i;
if( tv->info->field_tag == tag )
break;
}
if( i < td->td_customValueCount )
{
_TIFFfree(tv->value);
for( ; i < td->td_customValueCount-1; i++) {
td->td_customValues[i] = td->td_customValues[i+1];
}
td->td_customValueCount--;
}
}
tif->tif_flags |= TIFF_DIRTYDIRECT;
return (1);
}
/*
* Like TIFFSetField, but taking a varargs
* parameter list. This routine is useful
* for building higher-level interfaces on
* top of the library.
*/
int
TIFFVSetField(TIFF* tif, uint32 tag, va_list ap)
{
return OkToChangeTag(tif, tag) ?
(*tif->tif_tagmethods.vsetfield)(tif, tag, ap) : 0;
}
static int
_TIFFVGetField(TIFF* tif, uint32 tag, va_list ap)
{
TIFFDirectory* td = &tif->tif_dir;
int ret_val = 1;
switch (tag) {
case TIFFTAG_SUBFILETYPE:
*va_arg(ap, uint32*) = td->td_subfiletype;
break;
case TIFFTAG_IMAGEWIDTH:
*va_arg(ap, uint32*) = td->td_imagewidth;
break;
case TIFFTAG_IMAGELENGTH:
*va_arg(ap, uint32*) = td->td_imagelength;
break;
case TIFFTAG_BITSPERSAMPLE:
*va_arg(ap, uint16*) = td->td_bitspersample;
break;
case TIFFTAG_COMPRESSION:
*va_arg(ap, uint16*) = td->td_compression;
break;
case TIFFTAG_PHOTOMETRIC:
*va_arg(ap, uint16*) = td->td_photometric;
break;
case TIFFTAG_THRESHHOLDING:
*va_arg(ap, uint16*) = td->td_threshholding;
break;
case TIFFTAG_FILLORDER:
*va_arg(ap, uint16*) = td->td_fillorder;
break;
case TIFFTAG_ORIENTATION:
*va_arg(ap, uint16*) = td->td_orientation;
break;
case TIFFTAG_SAMPLESPERPIXEL:
*va_arg(ap, uint16*) = td->td_samplesperpixel;
break;
case TIFFTAG_ROWSPERSTRIP:
*va_arg(ap, uint32*) = td->td_rowsperstrip;
break;
case TIFFTAG_MINSAMPLEVALUE:
*va_arg(ap, uint16*) = td->td_minsamplevalue;
break;
case TIFFTAG_MAXSAMPLEVALUE:
*va_arg(ap, uint16*) = td->td_maxsamplevalue;
break;
case TIFFTAG_SMINSAMPLEVALUE:
if (tif->tif_flags & TIFF_PERSAMPLE)
*va_arg(ap, double**) = td->td_sminsamplevalue;
else
{
/* libtiff historially treats this as a single value. */
uint16 i;
double v = td->td_sminsamplevalue[0];
for (i=1; i < td->td_samplesperpixel; ++i)
if( td->td_sminsamplevalue[i] < v )
v = td->td_sminsamplevalue[i];
*va_arg(ap, double*) = v;
}
break;
case TIFFTAG_SMAXSAMPLEVALUE:
if (tif->tif_flags & TIFF_PERSAMPLE)
*va_arg(ap, double**) = td->td_smaxsamplevalue;
else
{
/* libtiff historially treats this as a single value. */
uint16 i;
double v = td->td_smaxsamplevalue[0];
for (i=1; i < td->td_samplesperpixel; ++i)
if( td->td_smaxsamplevalue[i] > v )
v = td->td_smaxsamplevalue[i];
*va_arg(ap, double*) = v;
}
break;
case TIFFTAG_XRESOLUTION:
*va_arg(ap, float*) = td->td_xresolution;
break;
case TIFFTAG_YRESOLUTION:
*va_arg(ap, float*) = td->td_yresolution;
break;
case TIFFTAG_PLANARCONFIG:
*va_arg(ap, uint16*) = td->td_planarconfig;
break;
case TIFFTAG_XPOSITION:
*va_arg(ap, float*) = td->td_xposition;
break;
case TIFFTAG_YPOSITION:
*va_arg(ap, float*) = td->td_yposition;
break;
case TIFFTAG_RESOLUTIONUNIT:
*va_arg(ap, uint16*) = td->td_resolutionunit;
break;
case TIFFTAG_PAGENUMBER:
*va_arg(ap, uint16*) = td->td_pagenumber[0];
*va_arg(ap, uint16*) = td->td_pagenumber[1];
break;
case TIFFTAG_HALFTONEHINTS:
*va_arg(ap, uint16*) = td->td_halftonehints[0];
*va_arg(ap, uint16*) = td->td_halftonehints[1];
break;
case TIFFTAG_COLORMAP:
*va_arg(ap, uint16**) = td->td_colormap[0];
*va_arg(ap, uint16**) = td->td_colormap[1];
*va_arg(ap, uint16**) = td->td_colormap[2];
break;
case TIFFTAG_STRIPOFFSETS:
case TIFFTAG_TILEOFFSETS:
_TIFFFillStriles( tif );
*va_arg(ap, uint64**) = td->td_stripoffset;
break;
case TIFFTAG_STRIPBYTECOUNTS:
case TIFFTAG_TILEBYTECOUNTS:
_TIFFFillStriles( tif );
*va_arg(ap, uint64**) = td->td_stripbytecount;
break;
case TIFFTAG_MATTEING:
*va_arg(ap, uint16*) =
(td->td_extrasamples == 1 &&
td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
break;
case TIFFTAG_EXTRASAMPLES:
*va_arg(ap, uint16*) = td->td_extrasamples;
*va_arg(ap, uint16**) = td->td_sampleinfo;
break;
case TIFFTAG_TILEWIDTH:
*va_arg(ap, uint32*) = td->td_tilewidth;
break;
case TIFFTAG_TILELENGTH:
*va_arg(ap, uint32*) = td->td_tilelength;
break;
case TIFFTAG_TILEDEPTH:
*va_arg(ap, uint32*) = td->td_tiledepth;
break;
case TIFFTAG_DATATYPE:
switch (td->td_sampleformat) {
case SAMPLEFORMAT_UINT:
*va_arg(ap, uint16*) = DATATYPE_UINT;
break;
case SAMPLEFORMAT_INT:
*va_arg(ap, uint16*) = DATATYPE_INT;
break;
case SAMPLEFORMAT_IEEEFP:
*va_arg(ap, uint16*) = DATATYPE_IEEEFP;
break;
case SAMPLEFORMAT_VOID:
*va_arg(ap, uint16*) = DATATYPE_VOID;
break;
}
break;
case TIFFTAG_SAMPLEFORMAT:
*va_arg(ap, uint16*) = td->td_sampleformat;
break;
case TIFFTAG_IMAGEDEPTH:
*va_arg(ap, uint32*) = td->td_imagedepth;
break;
case TIFFTAG_SUBIFD:
*va_arg(ap, uint16*) = td->td_nsubifd;
*va_arg(ap, uint64**) = td->td_subifd;
break;
case TIFFTAG_YCBCRPOSITIONING:
*va_arg(ap, uint16*) = td->td_ycbcrpositioning;
break;
case TIFFTAG_YCBCRSUBSAMPLING:
*va_arg(ap, uint16*) = td->td_ycbcrsubsampling[0];
*va_arg(ap, uint16*) = td->td_ycbcrsubsampling[1];
break;
case TIFFTAG_TRANSFERFUNCTION:
*va_arg(ap, uint16**) = td->td_transferfunction[0];
if (td->td_samplesperpixel - td->td_extrasamples > 1) {
*va_arg(ap, uint16**) = td->td_transferfunction[1];
*va_arg(ap, uint16**) = td->td_transferfunction[2];
}
break;
case TIFFTAG_REFERENCEBLACKWHITE:
*va_arg(ap, float**) = td->td_refblackwhite;
break;
case TIFFTAG_INKNAMES:
*va_arg(ap, char**) = td->td_inknames;
break;
default:
{
const TIFFField* fip =
TIFFFindField(tif, tag, TIFF_ANY);
int i;
/*
* This can happen if multiple images are open
* with different codecs which have private
* tags. The global tag information table may
* then have tags that are valid for one file
* but not the other. If the client tries to
* get a tag that is not valid for the image's
* codec then we'll arrive here.
*/
if( fip == NULL || fip->field_bit != FIELD_CUSTOM )
{
TIFFErrorExt(tif->tif_clientdata, "_TIFFVGetField",
"%s: Invalid %stag \"%s\" "
"(not supported by codec)",
tif->tif_name,
isPseudoTag(tag) ? "pseudo-" : "",
fip ? fip->field_name : "Unknown");
ret_val = 0;
break;
}
/*
* Do we have a custom value?
*/
ret_val = 0;
for (i = 0; i < td->td_customValueCount; i++) {
TIFFTagValue *tv = td->td_customValues + i;
if (tv->info->field_tag != tag)
continue;
if (fip->field_passcount) {
if (fip->field_readcount == TIFF_VARIABLE2)
*va_arg(ap, uint32*) = (uint32)tv->count;
else /* Assume TIFF_VARIABLE */
*va_arg(ap, uint16*) = (uint16)tv->count;
*va_arg(ap, void **) = tv->value;
ret_val = 1;
} else {
if ((fip->field_type == TIFF_ASCII
|| fip->field_readcount == TIFF_VARIABLE
|| fip->field_readcount == TIFF_VARIABLE2
|| fip->field_readcount == TIFF_SPP
|| tv->count > 1)
&& fip->field_tag != TIFFTAG_PAGENUMBER
&& fip->field_tag != TIFFTAG_HALFTONEHINTS
&& fip->field_tag != TIFFTAG_YCBCRSUBSAMPLING
&& fip->field_tag != TIFFTAG_DOTRANGE) {
*va_arg(ap, void **) = tv->value;
ret_val = 1;
} else {
int j;
char *val = (char *)tv->value;
for (j = 0; j < tv->count;
j++, val += _TIFFDataSize(tv->info->field_type)) {
switch (fip->field_type) {
case TIFF_BYTE:
case TIFF_UNDEFINED:
*va_arg(ap, uint8*) =
*(uint8 *)val;
ret_val = 1;
break;
case TIFF_SBYTE:
*va_arg(ap, int8*) =
*(int8 *)val;
ret_val = 1;
break;
case TIFF_SHORT:
*va_arg(ap, uint16*) =
*(uint16 *)val;
ret_val = 1;
break;
case TIFF_SSHORT:
*va_arg(ap, int16*) =
*(int16 *)val;
ret_val = 1;
break;
case TIFF_LONG:
case TIFF_IFD:
*va_arg(ap, uint32*) =
*(uint32 *)val;
ret_val = 1;
break;
case TIFF_SLONG:
*va_arg(ap, int32*) =
*(int32 *)val;
ret_val = 1;
break;
case TIFF_LONG8:
case TIFF_IFD8:
*va_arg(ap, uint64*) =
*(uint64 *)val;
ret_val = 1;
break;
case TIFF_SLONG8:
*va_arg(ap, int64*) =
*(int64 *)val;
ret_val = 1;
break;
case TIFF_RATIONAL:
case TIFF_SRATIONAL:
case TIFF_FLOAT:
*va_arg(ap, float*) =
*(float *)val;
ret_val = 1;
break;
case TIFF_DOUBLE:
*va_arg(ap, double*) =
*(double *)val;
ret_val = 1;
break;
default:
ret_val = 0;
break;
}
}
}
}
break;
}
}
}
return(ret_val);
}
/*
* Return the value of a field in the
* internal directory structure.
*/
int
TIFFGetField(TIFF* tif, uint32 tag, ...)
{
int status;
va_list ap;
va_start(ap, tag);
status = TIFFVGetField(tif, tag, ap);
va_end(ap);
return (status);
}
/*
* Like TIFFGetField, but taking a varargs
* parameter list. This routine is useful
* for building higher-level interfaces on
* top of the library.
*/
int
TIFFVGetField(TIFF* tif, uint32 tag, va_list ap)
{
const TIFFField* fip = TIFFFindField(tif, tag, TIFF_ANY);
return (fip && (isPseudoTag(tag) || TIFFFieldSet(tif, fip->field_bit)) ?
(*tif->tif_tagmethods.vgetfield)(tif, tag, ap) : 0);
}
#define CleanupField(member) { \
if (td->member) { \
_TIFFfree(td->member); \
td->member = 0; \
} \
}
/*
* Release storage associated with a directory.
*/
void
TIFFFreeDirectory(TIFF* tif)
{
TIFFDirectory *td = &tif->tif_dir;
int i;
_TIFFmemset(td->td_fieldsset, 0, FIELD_SETLONGS);
CleanupField(td_sminsamplevalue);
CleanupField(td_smaxsamplevalue);
CleanupField(td_colormap[0]);
CleanupField(td_colormap[1]);
CleanupField(td_colormap[2]);
CleanupField(td_sampleinfo);
CleanupField(td_subifd);
CleanupField(td_inknames);
CleanupField(td_refblackwhite);
CleanupField(td_transferfunction[0]);
CleanupField(td_transferfunction[1]);
CleanupField(td_transferfunction[2]);
CleanupField(td_stripoffset);
CleanupField(td_stripbytecount);
TIFFClrFieldBit(tif, FIELD_YCBCRSUBSAMPLING);
TIFFClrFieldBit(tif, FIELD_YCBCRPOSITIONING);
/* Cleanup custom tag values */
for( i = 0; i < td->td_customValueCount; i++ ) {
if (td->td_customValues[i].value)
_TIFFfree(td->td_customValues[i].value);
}
td->td_customValueCount = 0;
CleanupField(td_customValues);
#if defined(DEFER_STRILE_LOAD)
_TIFFmemset( &(td->td_stripoffset_entry), 0, sizeof(TIFFDirEntry));
_TIFFmemset( &(td->td_stripbytecount_entry), 0, sizeof(TIFFDirEntry));
#endif
}
#undef CleanupField
/*
* Client Tag extension support (from Niles Ritter).
*/
static TIFFExtendProc _TIFFextender = (TIFFExtendProc) NULL;
TIFFExtendProc
TIFFSetTagExtender(TIFFExtendProc extender)
{
TIFFExtendProc prev = _TIFFextender;
_TIFFextender = extender;
return (prev);
}
/*
* Setup for a new directory. Should we automatically call
* TIFFWriteDirectory() if the current one is dirty?
*
* The newly created directory will not exist on the file till
* TIFFWriteDirectory(), TIFFFlush() or TIFFClose() is called.
*/
int
TIFFCreateDirectory(TIFF* tif)
{
TIFFDefaultDirectory(tif);
tif->tif_diroff = 0;
tif->tif_nextdiroff = 0;
tif->tif_curoff = 0;
tif->tif_row = (uint32) -1;
tif->tif_curstrip = (uint32) -1;
return 0;
}
/*
* Setup a default directory structure.
*/
int
TIFFDefaultDirectory(TIFF* tif)
{
register TIFFDirectory* td = &tif->tif_dir;
const TIFFFieldArray* tiffFieldArray;
tiffFieldArray = _TIFFGetFields();
_TIFFSetupFields(tif, tiffFieldArray);
_TIFFmemset(td, 0, sizeof (*td));
td->td_fillorder = FILLORDER_MSB2LSB;
td->td_bitspersample = 1;
td->td_threshholding = THRESHHOLD_BILEVEL;
td->td_orientation = ORIENTATION_TOPLEFT;
td->td_samplesperpixel = 1;
td->td_rowsperstrip = (uint32) -1;
td->td_tilewidth = 0;
td->td_tilelength = 0;
td->td_tiledepth = 1;
td->td_stripbytecountsorted = 1; /* Our own arrays always sorted. */
td->td_resolutionunit = RESUNIT_INCH;
td->td_sampleformat = SAMPLEFORMAT_UINT;
td->td_imagedepth = 1;
td->td_ycbcrsubsampling[0] = 2;
td->td_ycbcrsubsampling[1] = 2;
td->td_ycbcrpositioning = YCBCRPOSITION_CENTERED;
tif->tif_postdecode = _TIFFNoPostDecode;
tif->tif_foundfield = NULL;
tif->tif_tagmethods.vsetfield = _TIFFVSetField;
tif->tif_tagmethods.vgetfield = _TIFFVGetField;
tif->tif_tagmethods.printdir = NULL;
/*
* Give client code a chance to install their own
* tag extensions & methods, prior to compression overloads.
*/
if (_TIFFextender)
(*_TIFFextender)(tif);
(void) TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
/*
* NB: The directory is marked dirty as a result of setting
* up the default compression scheme. However, this really
* isn't correct -- we want TIFF_DIRTYDIRECT to be set only
* if the user does something. We could just do the setup
* by hand, but it seems better to use the normal mechanism
* (i.e. TIFFSetField).
*/
tif->tif_flags &= ~TIFF_DIRTYDIRECT;
/*
* As per http://bugzilla.remotesensing.org/show_bug.cgi?id=19
* we clear the ISTILED flag when setting up a new directory.
* Should we also be clearing stuff like INSUBIFD?
*/
tif->tif_flags &= ~TIFF_ISTILED;
return (1);
}
static int
TIFFAdvanceDirectory(TIFF* tif, uint64* nextdir, uint64* off)
{
static const char module[] = "TIFFAdvanceDirectory";
if (isMapped(tif))
{
uint64 poff=*nextdir;
if (!(tif->tif_flags&TIFF_BIGTIFF))
{
tmsize_t poffa,poffb,poffc,poffd;
uint16 dircount;
uint32 nextdir32;
poffa=(tmsize_t)poff;
poffb=poffa+sizeof(uint16);
if (((uint64)poffa!=poff)||(poffb<poffa)||(poffb<(tmsize_t)sizeof(uint16))||(poffb>tif->tif_size))
{
TIFFErrorExt(tif->tif_clientdata,module,"Error fetching directory count");
return(0);
}
_TIFFmemcpy(&dircount,tif->tif_base+poffa,sizeof(uint16));
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabShort(&dircount);
poffc=poffb+dircount*12;
poffd=poffc+sizeof(uint32);
if ((poffc<poffb)||(poffc<dircount*12)||(poffd<poffc)||(poffd<(tmsize_t)sizeof(uint32))||(poffd>tif->tif_size))
{
TIFFErrorExt(tif->tif_clientdata,module,"Error fetching directory link");
return(0);
}
if (off!=NULL)
*off=(uint64)poffc;
_TIFFmemcpy(&nextdir32,tif->tif_base+poffc,sizeof(uint32));
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong(&nextdir32);
*nextdir=nextdir32;
}
else
{
tmsize_t poffa,poffb,poffc,poffd;
uint64 dircount64;
uint16 dircount16;
poffa=(tmsize_t)poff;
poffb=poffa+sizeof(uint64);
if (((uint64)poffa!=poff)||(poffb<poffa)||(poffb<(tmsize_t)sizeof(uint64))||(poffb>tif->tif_size))
{
TIFFErrorExt(tif->tif_clientdata,module,"Error fetching directory count");
return(0);
}
_TIFFmemcpy(&dircount64,tif->tif_base+poffa,sizeof(uint64));
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong8(&dircount64);
if (dircount64>0xFFFF)
{
TIFFErrorExt(tif->tif_clientdata,module,"Sanity check on directory count failed");
return(0);
}
dircount16=(uint16)dircount64;
poffc=poffb+dircount16*20;
poffd=poffc+sizeof(uint64);
if ((poffc<poffb)||(poffc<dircount16*20)||(poffd<poffc)||(poffd<(tmsize_t)sizeof(uint64))||(poffd>tif->tif_size))
{
TIFFErrorExt(tif->tif_clientdata,module,"Error fetching directory link");
return(0);
}
if (off!=NULL)
*off=(uint64)poffc;
_TIFFmemcpy(nextdir,tif->tif_base+poffc,sizeof(uint64));
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong8(nextdir);
}
return(1);
}
else
{
if (!(tif->tif_flags&TIFF_BIGTIFF))
{
uint16 dircount;
uint32 nextdir32;
if (!SeekOK(tif, *nextdir) ||
!ReadOK(tif, &dircount, sizeof (uint16))) {
TIFFErrorExt(tif->tif_clientdata, module, "%s: Error fetching directory count",
tif->tif_name);
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabShort(&dircount);
if (off != NULL)
*off = TIFFSeekFile(tif,
dircount*12, SEEK_CUR);
else
(void) TIFFSeekFile(tif,
dircount*12, SEEK_CUR);
if (!ReadOK(tif, &nextdir32, sizeof (uint32))) {
TIFFErrorExt(tif->tif_clientdata, module, "%s: Error fetching directory link",
tif->tif_name);
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong(&nextdir32);
*nextdir=nextdir32;
}
else
{
uint64 dircount64;
uint16 dircount16;
if (!SeekOK(tif, *nextdir) ||
!ReadOK(tif, &dircount64, sizeof (uint64))) {
TIFFErrorExt(tif->tif_clientdata, module, "%s: Error fetching directory count",
tif->tif_name);
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong8(&dircount64);
if (dircount64>0xFFFF)
{
TIFFErrorExt(tif->tif_clientdata, module, "Error fetching directory count");
return(0);
}
dircount16 = (uint16)dircount64;
if (off != NULL)
*off = TIFFSeekFile(tif,
dircount16*20, SEEK_CUR);
else
(void) TIFFSeekFile(tif,
dircount16*20, SEEK_CUR);
if (!ReadOK(tif, nextdir, sizeof (uint64))) {
TIFFErrorExt(tif->tif_clientdata, module, "%s: Error fetching directory link",
tif->tif_name);
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong8(nextdir);
}
return (1);
}
}
/*
* Count the number of directories in a file.
*/
uint16
TIFFNumberOfDirectories(TIFF* tif)
{
uint64 nextdir;
uint16 n;
if (!(tif->tif_flags&TIFF_BIGTIFF))
nextdir = tif->tif_header.classic.tiff_diroff;
else
nextdir = tif->tif_header.big.tiff_diroff;
n = 0;
while (nextdir != 0 && TIFFAdvanceDirectory(tif, &nextdir, NULL))
n++;
return (n);
}
/*
* Set the n-th directory as the current directory.
* NB: Directories are numbered starting at 0.
*/
int
TIFFSetDirectory(TIFF* tif, uint16 dirn)
{
uint64 nextdir;
uint16 n;
if (!(tif->tif_flags&TIFF_BIGTIFF))
nextdir = tif->tif_header.classic.tiff_diroff;
else
nextdir = tif->tif_header.big.tiff_diroff;
for (n = dirn; n > 0 && nextdir != 0; n--)
if (!TIFFAdvanceDirectory(tif, &nextdir, NULL))
return (0);
tif->tif_nextdiroff = nextdir;
/*
* Set curdir to the actual directory index. The
* -1 is because TIFFReadDirectory will increment
* tif_curdir after successfully reading the directory.
*/
tif->tif_curdir = (dirn - n) - 1;
/*
* Reset tif_dirnumber counter and start new list of seen directories.
* We need this to prevent IFD loops.
*/
tif->tif_dirnumber = 0;
return (TIFFReadDirectory(tif));
}
/*
* Set the current directory to be the directory
* located at the specified file offset. This interface
* is used mainly to access directories linked with
* the SubIFD tag (e.g. thumbnail images).
*/
int
TIFFSetSubDirectory(TIFF* tif, uint64 diroff)
{
tif->tif_nextdiroff = diroff;
/*
* Reset tif_dirnumber counter and start new list of seen directories.
* We need this to prevent IFD loops.
*/
tif->tif_dirnumber = 0;
return (TIFFReadDirectory(tif));
}
/*
* Return file offset of the current directory.
*/
uint64
TIFFCurrentDirOffset(TIFF* tif)
{
return (tif->tif_diroff);
}
/*
* Return an indication of whether or not we are
* at the last directory in the file.
*/
int
TIFFLastDirectory(TIFF* tif)
{
return (tif->tif_nextdiroff == 0);
}
/*
* Unlink the specified directory from the directory chain.
*/
int
TIFFUnlinkDirectory(TIFF* tif, uint16 dirn)
{
static const char module[] = "TIFFUnlinkDirectory";
uint64 nextdir;
uint64 off;
uint16 n;
if (tif->tif_mode == O_RDONLY) {
TIFFErrorExt(tif->tif_clientdata, module,
"Can not unlink directory in read-only file");
return (0);
}
/*
* Go to the directory before the one we want
* to unlink and nab the offset of the link
* field we'll need to patch.
*/
if (!(tif->tif_flags&TIFF_BIGTIFF))
{
nextdir = tif->tif_header.classic.tiff_diroff;
off = 4;
}
else
{
nextdir = tif->tif_header.big.tiff_diroff;
off = 8;
}
for (n = dirn-1; n > 0; n--) {
if (nextdir == 0) {
TIFFErrorExt(tif->tif_clientdata, module, "Directory %d does not exist", dirn);
return (0);
}
if (!TIFFAdvanceDirectory(tif, &nextdir, &off))
return (0);
}
/*
* Advance to the directory to be unlinked and fetch
* the offset of the directory that follows.
*/
if (!TIFFAdvanceDirectory(tif, &nextdir, NULL))
return (0);
/*
* Go back and patch the link field of the preceding
* directory to point to the offset of the directory
* that follows.
*/
(void) TIFFSeekFile(tif, off, SEEK_SET);
if (!(tif->tif_flags&TIFF_BIGTIFF))
{
uint32 nextdir32;
nextdir32=(uint32)nextdir;
assert((uint64)nextdir32==nextdir);
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong(&nextdir32);
if (!WriteOK(tif, &nextdir32, sizeof (uint32))) {
TIFFErrorExt(tif->tif_clientdata, module, "Error writing directory link");
return (0);
}
}
else
{
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong8(&nextdir);
if (!WriteOK(tif, &nextdir, sizeof (uint64))) {
TIFFErrorExt(tif->tif_clientdata, module, "Error writing directory link");
return (0);
}
}
/*
* Leave directory state setup safely. We don't have
* facilities for doing inserting and removing directories,
* so it's safest to just invalidate everything. This
* means that the caller can only append to the directory
* chain.
*/
(*tif->tif_cleanup)(tif);
if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) {
_TIFFfree(tif->tif_rawdata);
tif->tif_rawdata = NULL;
tif->tif_rawcc = 0;
tif->tif_rawdataoff = 0;
tif->tif_rawdataloaded = 0;
}
tif->tif_flags &= ~(TIFF_BEENWRITING|TIFF_BUFFERSETUP|TIFF_POSTENCODE|TIFF_BUF4WRITE);
TIFFFreeDirectory(tif);
TIFFDefaultDirectory(tif);
tif->tif_diroff = 0; /* force link on next write */
tif->tif_nextdiroff = 0; /* next write must be at end */
tif->tif_curoff = 0;
tif->tif_row = (uint32) -1;
tif->tif_curstrip = (uint32) -1;
return (1);
}
/* vim: set ts=8 sts=8 sw=8 noet: */
/*
* Local Variables:
* mode: c
* c-basic-offset: 8
* fill-column: 78
* End:
*/