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- /* $Header: /usr/people/sam/tiff/libtiff/RCS/tif_dir.c,v 1.151 1995/07/19 00:39:31 sam Exp $ */
-
- /*
- * Copyright (c) 1988-1995 Sam Leffler
- * Copyright (c) 1991-1995 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:
- TIFFError(tif->tif_name,
- "Internal error, tag value botch, tag \"%s\"",
- _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)
- {
- if (tag != TIFFTAG_IMAGELENGTH &&
- (tif->tif_flags & TIFF_BEENWRITING)) {
- const TIFFFieldInfo *fip = _TIFFFindFieldInfo(tif, tag, TIFF_ANY);
- /*
- * 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.
- */
- if (fip && !fip->field_oktochange) {
- 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:
- TIFFError("_TIFFVGetField",
- "Internal error, no value returned for tag \"%s\"",
- _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 && 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);
- }
-