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jedioutcast/utils/roq2/tiff/tif_dir.c

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Jedi Outcast v056
2013-04-04 18:02:27 +00:00
/* $Header: /roq/tiff/tif_dir.c 1 11/02/99 4:39p Zaphod $ */
/*
* Copyright (c) 1988-1996 Sam Leffler
* Copyright (c) 1991-1996 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 */
void
_TIFFsetByteArray(void** vpp, void* vp, long n)
{
if (*vpp)
_TIFFfree(*vpp), *vpp = 0;
if (vp && (*vpp = (void*) _TIFFmalloc(n)))
_TIFFmemcpy(*vpp, vp, n);
}
void _TIFFsetString(char** cpp, char* cp)
{ _TIFFsetByteArray((void**) cpp, (void*) cp, (long) (strlen(cp)+1)); }
void _TIFFsetShortArray(uint16** wpp, uint16* wp, long n)
{ _TIFFsetByteArray((void**) wpp, (void*) wp, n*sizeof (uint16)); }
void _TIFFsetLongArray(uint32** lpp, uint32* lp, long n)
{ _TIFFsetByteArray((void**) lpp, (void*) lp, n*sizeof (uint32)); }
void _TIFFsetFloatArray(float** fpp, float* fp, long n)
{ _TIFFsetByteArray((void**) fpp, (void*) fp, n*sizeof (float)); }
void _TIFFsetDoubleArray(double** dpp, double* dp, long n)
{ _TIFFsetByteArray((void**) dpp, (void*) dp, n*sizeof (double)); }
/*
* Install extra samples information.
*/
static int
setExtraSamples(TIFFDirectory* td, va_list ap, int* v)
{
uint16* va;
int i;
*v = va_arg(ap, int);
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)
return (0);
td->td_extrasamples = (uint16) *v;
_TIFFsetShortArray(&td->td_sampleinfo, va, td->td_extrasamples);
return (1);
}
static int
_TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
{
TIFFDirectory* td = &tif->tif_dir;
int status = 1;
uint32 v32;
int i, v;
switch (tag) {
case TIFFTAG_SUBFILETYPE:
td->td_subfiletype = va_arg(ap, uint32);
break;
case TIFFTAG_IMAGEWIDTH:
td->td_imagewidth = va_arg(ap, uint32);
break;
case TIFFTAG_IMAGELENGTH:
td->td_imagelength = va_arg(ap, uint32);
break;
case TIFFTAG_BITSPERSAMPLE:
td->td_bitspersample = (uint16) va_arg(ap, int);
/*
* 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 == 16)
tif->tif_postdecode = _TIFFSwab16BitData;
else if (td->td_bitspersample == 32)
tif->tif_postdecode = _TIFFSwab32BitData;
else if (td->td_bitspersample == 64)
tif->tif_postdecode = _TIFFSwab64BitData;
}
break;
case TIFFTAG_COMPRESSION:
v = va_arg(ap, int) & 0xffff;
/*
* 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 (td->td_compression == v)
break;
(*tif->tif_cleanup)(tif);
tif->tif_flags &= ~TIFF_CODERSETUP;
}
/*
* Setup new compression routine state.
*/
if (status = TIFFSetCompressionScheme(tif, v))
td->td_compression = v;
break;
case TIFFTAG_PHOTOMETRIC:
td->td_photometric = (uint16) va_arg(ap, int);
break;
case TIFFTAG_THRESHHOLDING:
td->td_threshholding = (uint16) va_arg(ap, int);
break;
case TIFFTAG_FILLORDER:
v = va_arg(ap, int);
if (v != FILLORDER_LSB2MSB && v != FILLORDER_MSB2LSB)
goto badvalue;
td->td_fillorder = (uint16) v;
break;
case TIFFTAG_DOCUMENTNAME:
_TIFFsetString(&td->td_documentname, va_arg(ap, char*));
break;
case TIFFTAG_ARTIST:
_TIFFsetString(&td->td_artist, va_arg(ap, char*));
break;
case TIFFTAG_DATETIME:
_TIFFsetString(&td->td_datetime, va_arg(ap, char*));
break;
case TIFFTAG_HOSTCOMPUTER:
_TIFFsetString(&td->td_hostcomputer, va_arg(ap, char*));
break;
case TIFFTAG_IMAGEDESCRIPTION:
_TIFFsetString(&td->td_imagedescription, va_arg(ap, char*));
break;
case TIFFTAG_MAKE:
_TIFFsetString(&td->td_make, va_arg(ap, char*));
break;
case TIFFTAG_MODEL:
_TIFFsetString(&td->td_model, va_arg(ap, char*));
break;
case TIFFTAG_SOFTWARE:
_TIFFsetString(&td->td_software, va_arg(ap, char*));
break;
case TIFFTAG_ORIENTATION:
v = va_arg(ap, int);
if (v < ORIENTATION_TOPLEFT || ORIENTATION_LEFTBOT < v) {
TIFFWarning(tif->tif_name,
"Bad value %ld for \"%s\" tag ignored",
v, _TIFFFieldWithTag(tif, tag)->field_name);
} else
td->td_orientation = (uint16) v;
break;
case TIFFTAG_SAMPLESPERPIXEL:
/* XXX should cross check -- e.g. if pallette, then 1 */
v = va_arg(ap, int);
if (v == 0)
goto badvalue;
td->td_samplesperpixel = (uint16) v;
break;
case TIFFTAG_ROWSPERSTRIP:
v32 = 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, int);
break;
case TIFFTAG_MAXSAMPLEVALUE:
td->td_maxsamplevalue = (uint16) va_arg(ap, int);
break;
case TIFFTAG_SMINSAMPLEVALUE:
td->td_sminsamplevalue = (double) va_arg(ap, dblparam_t);
break;
case TIFFTAG_SMAXSAMPLEVALUE:
td->td_smaxsamplevalue = (double) va_arg(ap, dblparam_t);
break;
case TIFFTAG_XRESOLUTION:
td->td_xresolution = (float) va_arg(ap, dblparam_t);
break;
case TIFFTAG_YRESOLUTION:
td->td_yresolution = (float) va_arg(ap, dblparam_t);
break;
case TIFFTAG_PLANARCONFIG:
v = va_arg(ap, int);
if (v != PLANARCONFIG_CONTIG && v != PLANARCONFIG_SEPARATE)
goto badvalue;
td->td_planarconfig = (uint16) v;
break;
case TIFFTAG_PAGENAME:
_TIFFsetString(&td->td_pagename, va_arg(ap, char*));
break;
case TIFFTAG_XPOSITION:
td->td_xposition = (float) va_arg(ap, dblparam_t);
break;
case TIFFTAG_YPOSITION:
td->td_yposition = (float) va_arg(ap, dblparam_t);
break;
case TIFFTAG_RESOLUTIONUNIT:
v = va_arg(ap, int);
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, int);
td->td_pagenumber[1] = (uint16) va_arg(ap, int);
break;
case TIFFTAG_HALFTONEHINTS:
td->td_halftonehints[0] = (uint16) va_arg(ap, int);
td->td_halftonehints[1] = (uint16) va_arg(ap, int);
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, int) != 0);
if (td->td_extrasamples) {
uint16 sv = EXTRASAMPLE_ASSOCALPHA;
_TIFFsetShortArray(&td->td_sampleinfo, &sv, 1);
}
break;
case TIFFTAG_TILEWIDTH:
v32 = va_arg(ap, uint32);
if (v32 % 16) {
if (tif->tif_mode != O_RDONLY)
goto badvalue32;
TIFFWarning(tif->tif_name,
"Nonstandard tile width %d, convert file", v32);
}
td->td_tilewidth = v32;
tif->tif_flags |= TIFF_ISTILED;
break;
case TIFFTAG_TILELENGTH:
v32 = va_arg(ap, uint32);
if (v32 % 16) {
if (tif->tif_mode != O_RDONLY)
goto badvalue32;
TIFFWarning(tif->tif_name,
"Nonstandard tile length %d, convert file", v32);
}
td->td_tilelength = v32;
tif->tif_flags |= TIFF_ISTILED;
break;
case TIFFTAG_TILEDEPTH:
v32 = va_arg(ap, uint32);
if (v32 == 0)
goto badvalue32;
td->td_tiledepth = v32;
break;
case TIFFTAG_DATATYPE:
v = va_arg(ap, int);
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 = va_arg(ap, int);
if (v < SAMPLEFORMAT_UINT || SAMPLEFORMAT_VOID < v)
goto badvalue;
td->td_sampleformat = (uint16) v;
break;
case TIFFTAG_IMAGEDEPTH:
td->td_imagedepth = va_arg(ap, uint32);
break;
#if SUBIFD_SUPPORT
case TIFFTAG_SUBIFD:
if ((tif->tif_flags & TIFF_INSUBIFD) == 0) {
td->td_nsubifd = (uint16) va_arg(ap, int);
_TIFFsetLongArray(&td->td_subifd, va_arg(ap, uint32*),
(long) td->td_nsubifd);
} else {
TIFFError(tif->tif_name, "Sorry, cannot nest SubIFDs");
status = 0;
}
break;
#endif
#ifdef YCBCR_SUPPORT
case TIFFTAG_YCBCRCOEFFICIENTS:
_TIFFsetFloatArray(&td->td_ycbcrcoeffs, va_arg(ap, float*), 3);
break;
case TIFFTAG_YCBCRPOSITIONING:
td->td_ycbcrpositioning = (uint16) va_arg(ap, int);
break;
case TIFFTAG_YCBCRSUBSAMPLING:
td->td_ycbcrsubsampling[0] = (uint16) va_arg(ap, int);
td->td_ycbcrsubsampling[1] = (uint16) va_arg(ap, int);
break;
#endif
#ifdef COLORIMETRY_SUPPORT
case TIFFTAG_WHITEPOINT:
_TIFFsetFloatArray(&td->td_whitepoint, va_arg(ap, float*), 2);
break;
case TIFFTAG_PRIMARYCHROMATICITIES:
_TIFFsetFloatArray(&td->td_primarychromas, va_arg(ap, float*), 6);
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;
#endif
#ifdef CMYK_SUPPORT
case TIFFTAG_INKSET:
td->td_inkset = (uint16) va_arg(ap, int);
break;
case TIFFTAG_DOTRANGE:
/* XXX should check for null range */
td->td_dotrange[0] = (uint16) va_arg(ap, int);
td->td_dotrange[1] = (uint16) va_arg(ap, int);
break;
case TIFFTAG_INKNAMES:
_TIFFsetString(&td->td_inknames, va_arg(ap, char*));
break;
case TIFFTAG_TARGETPRINTER:
_TIFFsetString(&td->td_targetprinter, va_arg(ap, char*));
break;
#endif
default:
/*
* 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.
*/
TIFFError("TIFFSetField",
"%s: Invalid %stag \"%s\" (not supported by codec)",
tif->tif_name, isPseudoTag(tag) ? "pseduo-" : "",
_TIFFFieldWithTag(tif, tag)->field_name);
status = 0;
break;
}
if (status) {
TIFFSetFieldBit(tif, _TIFFFieldWithTag(tif, tag)->field_bit);
tif->tif_flags |= TIFF_DIRTYDIRECT;
}
va_end(ap);
return (status);
badvalue:
TIFFError(tif->tif_name, "%d: Bad value for \"%s\"", v,
_TIFFFieldWithTag(tif, tag)->field_name);
va_end(ap);
return (0);
badvalue32:
TIFFError(tif->tif_name, "%ld: Bad value for \"%s\"", v32,
_TIFFFieldWithTag(tif, tag)->field_name);
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, ttag_t tag)
{
const TIFFFieldInfo* fip = _TIFFFindFieldInfo(tif, tag, TIFF_ANY);
if (!fip) { /* unknown tag */
TIFFError("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.
*/
TIFFError("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, ttag_t tag, ...)
{
va_list ap;
int status;
va_start(ap, tag);
status = TIFFVSetField(tif, tag, ap);
va_end(ap);
return (status);
}
/*
* 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, ttag_t tag, va_list ap)
{
return OkToChangeTag(tif, tag) ?
(*tif->tif_vsetfield)(tif, tag, ap) : 0;
}
static int
_TIFFVGetField(TIFF* tif, ttag_t tag, va_list ap)
{
TIFFDirectory* td = &tif->tif_dir;
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_DOCUMENTNAME:
*va_arg(ap, char**) = td->td_documentname;
break;
case TIFFTAG_ARTIST:
*va_arg(ap, char**) = td->td_artist;
break;
case TIFFTAG_DATETIME:
*va_arg(ap, char**) = td->td_datetime;
break;
case TIFFTAG_HOSTCOMPUTER:
*va_arg(ap, char**) = td->td_hostcomputer;
break;
case TIFFTAG_IMAGEDESCRIPTION:
*va_arg(ap, char**) = td->td_imagedescription;
break;
case TIFFTAG_MAKE:
*va_arg(ap, char**) = td->td_make;
break;
case TIFFTAG_MODEL:
*va_arg(ap, char**) = td->td_model;
break;
case TIFFTAG_SOFTWARE:
*va_arg(ap, char**) = td->td_software;
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:
*va_arg(ap, double*) = td->td_sminsamplevalue;
break;
case TIFFTAG_SMAXSAMPLEVALUE:
*va_arg(ap, double*) = td->td_smaxsamplevalue;
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_PAGENAME:
*va_arg(ap, char**) = td->td_pagename;
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:
*va_arg(ap, uint32**) = td->td_stripoffset;
break;
case TIFFTAG_STRIPBYTECOUNTS:
case TIFFTAG_TILEBYTECOUNTS:
*va_arg(ap, uint32**) = 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;
#if SUBIFD_SUPPORT
case TIFFTAG_SUBIFD:
*va_arg(ap, uint16*) = td->td_nsubifd;
*va_arg(ap, uint32**) = td->td_subifd;
break;
#endif
#ifdef YCBCR_SUPPORT
case TIFFTAG_YCBCRCOEFFICIENTS:
*va_arg(ap, float**) = td->td_ycbcrcoeffs;
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;
#endif
#ifdef COLORIMETRY_SUPPORT
case TIFFTAG_WHITEPOINT:
*va_arg(ap, float**) = td->td_whitepoint;
break;
case TIFFTAG_PRIMARYCHROMATICITIES:
*va_arg(ap, float**) = td->td_primarychromas;
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;
#endif
#ifdef CMYK_SUPPORT
case TIFFTAG_INKSET:
*va_arg(ap, uint16*) = td->td_inkset;
break;
case TIFFTAG_DOTRANGE:
*va_arg(ap, uint16*) = td->td_dotrange[0];
*va_arg(ap, uint16*) = td->td_dotrange[1];
break;
case TIFFTAG_INKNAMES:
*va_arg(ap, char**) = td->td_inknames;
break;
case TIFFTAG_TARGETPRINTER:
*va_arg(ap, char**) = td->td_targetprinter;
break;
#endif
default:
/*
* 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.
*/
TIFFError("TIFFGetField",
"%s: Invalid %stag \"%s\" (not supported by codec)",
tif->tif_name, isPseudoTag(tag) ? "pseudo-" : "",
_TIFFFieldWithTag(tif, tag)->field_name);
break;
}
return (1);
}
/*
* Return the value of a field in the
* internal directory structure.
*/
int
TIFFGetField(TIFF* tif, ttag_t 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, ttag_t tag, va_list ap)
{
const TIFFFieldInfo* fip = _TIFFFindFieldInfo(tif, tag, TIFF_ANY);
return (fip && (isPseudoTag(tag) || TIFFFieldSet(tif, fip->field_bit)) ?
(*tif->tif_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)
{
register TIFFDirectory *td = &tif->tif_dir;
CleanupField(td_colormap[0]);
CleanupField(td_colormap[1]);
CleanupField(td_colormap[2]);
CleanupField(td_documentname);
CleanupField(td_artist);
CleanupField(td_datetime);
CleanupField(td_hostcomputer);
CleanupField(td_imagedescription);
CleanupField(td_make);
CleanupField(td_model);
CleanupField(td_software);
CleanupField(td_pagename);
CleanupField(td_sampleinfo);
#if SUBIFD_SUPPORT
CleanupField(td_subifd);
#endif
#ifdef YCBCR_SUPPORT
CleanupField(td_ycbcrcoeffs);
#endif
#ifdef CMYK_SUPPORT
CleanupField(td_inknames);
CleanupField(td_targetprinter);
#endif
#ifdef COLORIMETRY_SUPPORT
CleanupField(td_whitepoint);
CleanupField(td_primarychromas);
CleanupField(td_refblackwhite);
CleanupField(td_transferfunction[0]);
CleanupField(td_transferfunction[1]);
CleanupField(td_transferfunction[2]);
#endif
CleanupField(td_stripoffset);
CleanupField(td_stripbytecount);
}
#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 a default directory structure.
*/
int
TIFFDefaultDirectory(TIFF* tif)
{
register TIFFDirectory* td = &tif->tif_dir;
_TIFFSetupFieldInfo(tif);
_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 = (uint32) -1;
td->td_tilelength = (uint32) -1;
td->td_tiledepth = 1;
td->td_resolutionunit = RESUNIT_INCH;
td->td_sampleformat = SAMPLEFORMAT_VOID;
td->td_imagedepth = 1;
#ifdef YCBCR_SUPPORT
td->td_ycbcrsubsampling[0] = 2;
td->td_ycbcrsubsampling[1] = 2;
td->td_ycbcrpositioning = YCBCRPOSITION_CENTERED;
#endif
#ifdef CMYK_SUPPORT
td->td_inkset = INKSET_CMYK;
#endif
tif->tif_postdecode = _TIFFNoPostDecode;
tif->tif_vsetfield = _TIFFVSetField;
tif->tif_vgetfield = _TIFFVGetField;
tif->tif_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;
return (1);
}
static int
TIFFAdvanceDirectory(TIFF* tif, uint32* nextdir, toff_t* off)
{
static const char module[] = "TIFFAdvanceDirectory";
uint16 dircount;
if (!SeekOK(tif, *nextdir) ||
!ReadOK(tif, &dircount, sizeof (uint16))) {
TIFFError(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*sizeof (TIFFDirEntry), SEEK_CUR);
else
(void) TIFFSeekFile(tif,
dircount*sizeof (TIFFDirEntry), SEEK_CUR);
if (!ReadOK(tif, nextdir, sizeof (uint32))) {
TIFFError(module, "%s: Error fetching directory link",
tif->tif_name);
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong(nextdir);
return (1);
}
/*
* Set the n-th directory as the current directory.
* NB: Directories are numbered starting at 0.
*/
int
TIFFSetDirectory(TIFF* tif, tdir_t dirn)
{
uint32 nextdir;
tdir_t n;
nextdir = tif->tif_header.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;
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, uint32 diroff)
{
tif->tif_nextdiroff = diroff;
return (TIFFReadDirectory(tif));
}
/*
* Return file offset of the current directory.
*/
uint32
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, tdir_t dirn)
{
static const char module[] = "TIFFUnlinkDirectory";
uint32 nextdir;
toff_t off;
tdir_t n;
if (tif->tif_mode == O_RDONLY) {
TIFFError(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.
*/
nextdir = tif->tif_header.tiff_diroff;
off = sizeof (uint16) + sizeof (uint16);
for (n = dirn-1; n > 0; n--) {
if (nextdir == 0) {
TIFFError(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_SWAB)
TIFFSwabLong(&nextdir);
if (!WriteOK(tif, &nextdir, sizeof (uint32))) {
TIFFError(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_flags &= ~(TIFF_BEENWRITING|TIFF_BUFFERSETUP|TIFF_POSTENCODE);
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 = (tstrip_t) -1;
return (1);
}
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