diff options
Diffstat (limited to 'tiff/contrib/pds/tif_pdsdirwrite.c')
| -rwxr-xr-x | tiff/contrib/pds/tif_pdsdirwrite.c | 971 |
1 files changed, 971 insertions, 0 deletions
diff --git a/tiff/contrib/pds/tif_pdsdirwrite.c b/tiff/contrib/pds/tif_pdsdirwrite.c new file mode 100755 index 0000000..3c632da --- /dev/null +++ b/tiff/contrib/pds/tif_pdsdirwrite.c @@ -0,0 +1,971 @@ +/* $Header: /cvs/maptools/cvsroot/libtiff/contrib/pds/tif_pdsdirwrite.c,v 1.4 2010-06-08 18:55:15 bfriesen Exp $ */ + +/* When writing data to TIFF files, it is often useful to store application- + specific data in a private TIFF directory so that the tags don't need to + be registered and won't conflict with other people's user-defined tags. + One needs to have a registered public tag which contains some amount of + raw data. That raw data, however, is interpreted at an independent, + separate, private tiff directory. This file provides some routines which + will be useful for converting that data from its raw binary form into + the proper form for your application. +*/ + +/* + * Copyright (c) 1988-1996 Sam Leffler + * Copyright (c) 1991-1996 Silicon Graphics, Inc. + * Copyright (c( 1996 USAF Phillips Laboratory + * + * 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. + * + * These routines written by Conrad J. Poelman on a single late-night of + * March 20-21, 1996. + * + * The entire purpose of this file is to provide a single external function, + * TIFFWritePrivateDataSubDirectory(). This function is intended for use + * in writing a private subdirectory structure into a TIFF file. The + * actual reading of data from the structure is handled by the getFieldFn(), + * which is passed to TIFFWritePrivateDataSubDirectory() as a parameter. The + * idea is to enable any application wishing to read private subdirectories to + * do so easily using this function, without modifying the TIFF library. + * + * The astute observer will notice that only two functions are at all different + * from the original tif_dirwrite.c file: TIFFWritePrivateDataSubDirectory()and + * TIFFWriteNormalSubTag(). All the other stuff that makes this file so huge + * is only necessary because all of those functions are declared static in + * tif_dirwrite.c, so we have to totally duplicate them in order to use them. + * + * Oh, also please note the bug-fix in the routine TIFFWriteNormalSubTag(), + * which equally should be applied to TIFFWriteNormalTag(). + * + */ +#include "tiffiop.h" + +#if HAVE_IEEEFP +#define TIFFCvtNativeToIEEEFloat(tif, n, fp) +#define TIFFCvtNativeToIEEEDouble(tif, n, dp) +#else +extern void TIFFCvtNativeToIEEEFloat(TIFF*, uint32, float*); +extern void TIFFCvtNativeToIEEEDouble(TIFF*, uint32, double*); +#endif + +static int TIFFWriteNormalTag(TIFF*, TIFFDirEntry*, const TIFFFieldInfo*); +static int TIFFWriteNormalSubTag(TIFF*, TIFFDirEntry*, const TIFFFieldInfo*, + int (*getFieldFn)(TIFF *tif,ttag_t tag,...)); +static void TIFFSetupShortLong(TIFF*, ttag_t, TIFFDirEntry*, uint32); +static int TIFFSetupShortPair(TIFF*, ttag_t, TIFFDirEntry*); +static int TIFFWritePerSampleShorts(TIFF*, ttag_t, TIFFDirEntry*); +static int TIFFWritePerSampleAnys(TIFF*, TIFFDataType, ttag_t, TIFFDirEntry*); +static int TIFFWriteShortTable(TIFF*, ttag_t, TIFFDirEntry*, uint32, uint16**); +static int TIFFWriteShortArray(TIFF*, + TIFFDataType, ttag_t, TIFFDirEntry*, uint32, uint16*); +static int TIFFWriteLongArray(TIFF *, + TIFFDataType, ttag_t, TIFFDirEntry*, uint32, uint32*); +static int TIFFWriteRationalArray(TIFF *, + TIFFDataType, ttag_t, TIFFDirEntry*, uint32, float*); +static int TIFFWriteFloatArray(TIFF *, + TIFFDataType, ttag_t, TIFFDirEntry*, uint32, float*); +static int TIFFWriteDoubleArray(TIFF *, + TIFFDataType, ttag_t, TIFFDirEntry*, uint32, double*); +static int TIFFWriteByteArray(TIFF*, TIFFDirEntry*, char*); +static int TIFFWriteAnyArray(TIFF*, + TIFFDataType, ttag_t, TIFFDirEntry*, uint32, double*); +#ifdef COLORIMETRY_SUPPORT +static int TIFFWriteTransferFunction(TIFF*, TIFFDirEntry*); +#endif +static int TIFFWriteData(TIFF*, TIFFDirEntry*, char*); +static int TIFFLinkDirectory(TIFF*); + +#define WriteRationalPair(type, tag1, v1, tag2, v2) { \ + if (!TIFFWriteRational(tif, type, tag1, dir, v1)) \ + goto bad; \ + if (!TIFFWriteRational(tif, type, tag2, dir+1, v2)) \ + goto bad; \ + dir++; \ +} +#define TIFFWriteRational(tif, type, tag, dir, v) \ + TIFFWriteRationalArray((tif), (type), (tag), (dir), 1, &(v)) +#ifndef TIFFWriteRational +static int TIFFWriteRational(TIFF*, + TIFFDataType, ttag_t, TIFFDirEntry*, float); +#endif + +/* This function will write an entire directory to the disk, and return the + offset value indicating where in the file it wrote the beginning of the + directory structure. This is NOT the same as the offset value before + calling this function, because some of the fields may have caused various + data items to be written out BEFORE writing the directory structure. + + This code was basically written by ripping of the TIFFWriteDirectory() + code and generalizing it, using RPS's TIFFWritePliIfd() code for + inspiration. My original goal was to make this code general enough that + the original TIFFWriteDirectory() could be rewritten to just call this + function with the appropriate field and field-accessing arguments. + + However, now I realize that there's a lot of code that gets executed for + the main, standard TIFF directories that does not apply to special + private subdirectories, so such a reimplementation for the sake of + eliminating redundant or duplicate code is probably not possible, + unless we also pass in a Main flag to indiciate which type of handling + to do, which would be kind of a hack. I've marked those places where I + changed or ripped out code which would have to be re-inserted to + generalize this function. If it can be done in a clean and graceful way, + it would be a great way to generalize the TIFF library. Otherwise, I'll + just leave this code here where it duplicates but remains on top of and + hopefully mostly independent of the main TIFF library. + + The caller will probably want to free the sub directory structure after + returning from this call, since otherwise once written out, the user + is likely to forget about it and leave data lying around. +*/ +toff_t +TIFFWritePrivateDataSubDirectory(TIFF* tif, + uint32 pdir_fieldsset[], int pdir_fields_last, + TIFFFieldInfo *field_info, + int (*getFieldFn)(TIFF *tif, ttag_t tag, ...)) +{ + uint16 dircount; + uint32 diroff, nextdiroff; + ttag_t tag; + uint32 nfields; + tsize_t dirsize; + char* data; + TIFFDirEntry* dir; + u_long b, *fields, fields_size; + toff_t directory_offset; + TIFFFieldInfo* fip; + + /* + * Deleted out all of the encoder flushing and such code from here - + * not necessary for subdirectories. + */ + + /* Finish writing out any image data. */ + TIFFFlushData(tif); + + /* + * Size the directory so that we can calculate + * offsets for the data items that aren't kept + * in-place in each field. + */ + nfields = 0; + for (b = 0; b <= pdir_fields_last; b++) + if (FieldSet(pdir_fieldsset, b)) + /* Deleted code to make size of first 4 tags 2 + instead of 1. */ + nfields += 1; + dirsize = nfields * sizeof (TIFFDirEntry); + data = (char*) _TIFFmalloc(dirsize); + if (data == NULL) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Cannot write private subdirectory, out of space"); + return (0); + } + /* + * Place directory in data section of the file. If there isn't one + * yet, place it at the end of the file. The directory is treated as + * data, so we don't link it into the directory structure at all. + */ + if (tif->tif_dataoff == 0) + tif->tif_dataoff =(TIFFSeekFile(tif, (toff_t) 0, SEEK_END)+1) &~ 1; + diroff = tif->tif_dataoff; + tif->tif_dataoff = (toff_t)( + diroff + sizeof (uint16) + dirsize + sizeof (toff_t)); + if (tif->tif_dataoff & 1) + tif->tif_dataoff++; + (void) TIFFSeekFile(tif, tif->tif_dataoff, SEEK_SET); + /*tif->tif_curdir++;*/ + dir = (TIFFDirEntry*) data; + /* + * Setup external form of directory + * entries and write data items. + */ + /* + * We make a local copy of the fieldsset here so that we don't mess + * up the original one when we call ResetFieldBit(). But I'm not sure + * why the original code calls ResetFieldBit(), since we're already + * going through the fields in order... + * + * fields_size is the number of uint32's we will need to hold the + * bit-mask for all of the fields. If our highest field number is + * 100, then we'll need 100 / (8*4)+1 == 4 uint32's to hold the + * fieldset. + * + * Unlike the original code, we allocate fields dynamically based + * on the requested pdir_fields_last value, allowing private + * data subdirectories to contain more than the built-in code's limit + * of 95 tags in a directory. + */ + fields_size = pdir_fields_last / (8*sizeof(uint32)) + 1; + fields = _TIFFmalloc(fields_size*sizeof(uint32)); + _TIFFmemcpy(fields, pdir_fieldsset, fields_size * sizeof(uint32)); + + /* Deleted "write out extra samples tag" code here. */ + + /* Deleted code for checking a billion little special cases for the + * standard TIFF tags. Should add a general mechanism for overloading + * write function for each field, just like Brian kept telling me!!! + */ + for (fip = field_info; fip->field_tag; fip++) { + /* Deleted code to check for FIELD_IGNORE!! */ + if (/* fip->field_bit == FIELD_IGNORE || */ + !FieldSet(fields, fip->field_bit)) + continue; + if (!TIFFWriteNormalSubTag(tif, dir, fip, getFieldFn)) + goto bad; + dir++; + ResetFieldBit(fields, fip->field_bit); + } + + /* Now we've written all of the referenced data, and are about to + write the main directory structure, so grab the tif_dataoff value + now so we can remember where we wrote the directory. */ + directory_offset = tif->tif_dataoff; + + /* + * Write directory. + */ + dircount = (uint16) nfields; + /* Deleted code to link to the next directory - we set it to zero! */ + nextdiroff = 0; + if (tif->tif_flags & TIFF_SWAB) { + /* + * The file's byte order is opposite to the + * native machine architecture. We overwrite + * the directory information with impunity + * because it'll be released below after we + * write it to the file. Note that all the + * other tag construction routines assume that + * we do this byte-swapping; i.e. they only + * byte-swap indirect data. + */ + for (dir = (TIFFDirEntry*) data; dircount; dir++, dircount--) { + TIFFSwabArrayOfShort(&dir->tdir_tag, 2); + TIFFSwabArrayOfLong(&dir->tdir_count, 2); + } + dircount = (uint16) nfields; + TIFFSwabShort(&dircount); + TIFFSwabLong(&nextdiroff); + } + + (void) TIFFSeekFile(tif, tif->tif_dataoff, SEEK_SET); + if (!WriteOK(tif, &dircount, sizeof (dircount))) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing private subdirectory count"); + goto bad; + } + if (!WriteOK(tif, data, dirsize)) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing private subdirectory contents"); + goto bad; + } + if (!WriteOK(tif, &nextdiroff, sizeof (nextdiroff))) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing private subdirectory link"); + goto bad; + } + tif->tif_dataoff += sizeof(dircount) + dirsize + sizeof(nextdiroff); + + _TIFFfree(data); + _TIFFfree(fields); + tif->tif_flags &= ~TIFF_DIRTYDIRECT; + +#if (0) + /* This stuff commented out because I don't think we want it for + subdirectories, but I could be wrong. */ + (*tif->tif_cleanup)(tif); + + /* + * Reset directory-related state for subsequent + * directories. + */ + TIFFDefaultDirectory(tif); + tif->tif_curoff = 0; + tif->tif_row = (uint32) -1; + tif->tif_curstrip = (tstrip_t) -1; +#endif + + return (directory_offset); +bad: + _TIFFfree(data); + _TIFFfree(fields); + return (0); +} +#undef WriteRationalPair + +/* + * Process tags that are not special cased. + */ +/* The standard function TIFFWriteNormalTag() could definitely be replaced + with a simple call to this function, just adding TIFFGetField() as the + last argument. */ +static int +TIFFWriteNormalSubTag(TIFF* tif, TIFFDirEntry* dir, const TIFFFieldInfo* fip, + int (*getFieldFn)(TIFF *tif, ttag_t tag, ...)) +{ + u_short wc = (u_short) fip->field_writecount; + + dir->tdir_tag = fip->field_tag; + dir->tdir_type = (u_short) fip->field_type; + dir->tdir_count = wc; +#define WRITEF(x,y) x(tif, fip->field_type, fip->field_tag, dir, wc, y) + switch (fip->field_type) { + case TIFF_SHORT: + case TIFF_SSHORT: + if (wc > 1) { + uint16* wp; + if (wc == (u_short) TIFF_VARIABLE) { + (*getFieldFn)(tif, fip->field_tag, &wc, &wp); + dir->tdir_count = wc; + } else + (*getFieldFn)(tif, fip->field_tag, &wp); + if (!WRITEF(TIFFWriteShortArray, wp)) + return (0); + } else { + uint16 sv; + (*getFieldFn)(tif, fip->field_tag, &sv); + dir->tdir_offset = + TIFFInsertData(tif, dir->tdir_type, sv); + } + break; + case TIFF_LONG: + case TIFF_SLONG: + if (wc > 1) { + uint32* lp; + if (wc == (u_short) TIFF_VARIABLE) { + (*getFieldFn)(tif, fip->field_tag, &wc, &lp); + dir->tdir_count = wc; + } else + (*getFieldFn)(tif, fip->field_tag, &lp); + if (!WRITEF(TIFFWriteLongArray, lp)) + return (0); + } else { + /* XXX handle LONG->SHORT conversion */ + (*getFieldFn)(tif, fip->field_tag, &dir->tdir_offset); + } + break; + case TIFF_RATIONAL: + case TIFF_SRATIONAL: + if (wc > 1) { + float* fp; + if (wc == (u_short) TIFF_VARIABLE) { + (*getFieldFn)(tif, fip->field_tag, &wc, &fp); + dir->tdir_count = wc; + } else + (*getFieldFn)(tif, fip->field_tag, &fp); + if (!WRITEF(TIFFWriteRationalArray, fp)) + return (0); + } else { + float fv; + (*getFieldFn)(tif, fip->field_tag, &fv); + if (!WRITEF(TIFFWriteRationalArray, &fv)) + return (0); + } + break; + case TIFF_FLOAT: + if (wc > 1) { + float* fp; + if (wc == (u_short) TIFF_VARIABLE) { + (*getFieldFn)(tif, fip->field_tag, &wc, &fp); + dir->tdir_count = wc; + } else + (*getFieldFn)(tif, fip->field_tag, &fp); + if (!WRITEF(TIFFWriteFloatArray, fp)) + return (0); + } else { + float fv; + (*getFieldFn)(tif, fip->field_tag, &fv); + if (!WRITEF(TIFFWriteFloatArray, &fv)) + return (0); + } + break; + case TIFF_DOUBLE: + /* Hey - I think this is a bug, or at least a "gross + inconsistency", in the TIFF library. Look at the original + TIFF library code below within the "#if (0) ... #else". + Just from the type of *dp, you can see that this code + expects TIFFGetField() to be handed a double ** for + any TIFF_DOUBLE tag, even for the constant wc==1 case. + This is totally inconsistent with other fields (like + TIFF_FLOAT, above) and is also inconsistent with the + TIFFSetField() function for TIFF_DOUBLEs, which expects + to be passed a single double by value for the wc==1 case. + (See the handling of TIFFFetchNormalTag() in tif_dirread.c + for an example.) Maybe this function was written before + TIFFWriteDoubleArray() was written, not that that's an + excuse. Anyway, the new code below is a trivial modification + of the TIFF_FLOAT code above. The fact that even single + doubles get written out in the data segment and get an + offset value stored is irrelevant here - that is all + handled by TIFFWriteDoubleArray(). */ +#if (0) + { double* dp; + if (wc == (u_short) TIFF_VARIABLE) { + (*getFieldFn)(tif, fip->field_tag, &wc, &dp); + dir->tdir_count = wc; + } else + (*getFieldFn)(tif, fip->field_tag, &dp); + TIFFCvtNativeToIEEEDouble(tif, wc, dp); + if (!TIFFWriteData(tif, dir, (char*) dp)) + return (0); + } +#else + if (wc > 1) { + double* dp; + if (wc == (u_short) TIFF_VARIABLE) { + (*getFieldFn)(tif, fip->field_tag, &wc, &dp); + dir->tdir_count = wc; + } else + (*getFieldFn)(tif, fip->field_tag, &dp); + if (!WRITEF(TIFFWriteDoubleArray, dp)) + return (0); + } else { + double dv; + (*getFieldFn)(tif, fip->field_tag, &dv); + if (!WRITEF(TIFFWriteDoubleArray, &dv)) + return (0); + } +#endif + break; + case TIFF_ASCII: + { char* cp; + (*getFieldFn)(tif, fip->field_tag, &cp); + dir->tdir_count = (uint32) (strlen(cp) + 1); + if (!TIFFWriteByteArray(tif, dir, cp)) + return (0); + } + break; + case TIFF_UNDEFINED: + { char* cp; + if (wc == (u_short) TIFF_VARIABLE) { + (*getFieldFn)(tif, fip->field_tag, &wc, &cp); + dir->tdir_count = wc; + } else + (*getFieldFn)(tif, fip->field_tag, &cp); + if (!TIFFWriteByteArray(tif, dir, cp)) + return (0); + } + break; + } + return (1); +} +#undef WRITEF + +/* Everything after this is exactly duplicated from the standard tif_dirwrite.c + file, necessitated by the fact that they are declared static there so + we can't call them! +*/ +/* + * Setup a directory entry with either a SHORT + * or LONG type according to the value. + */ +static void +TIFFSetupShortLong(TIFF* tif, ttag_t tag, TIFFDirEntry* dir, uint32 v) +{ + dir->tdir_tag = tag; + dir->tdir_count = 1; + if (v > 0xffffL) { + dir->tdir_type = (short) TIFF_LONG; + dir->tdir_offset = v; + } else { + dir->tdir_type = (short) TIFF_SHORT; + dir->tdir_offset = TIFFInsertData(tif, (int) TIFF_SHORT, v); + } +} +#undef MakeShortDirent + +#ifndef TIFFWriteRational +/* + * Setup a RATIONAL directory entry and + * write the associated indirect value. + */ +static int +TIFFWriteRational(TIFF* tif, + TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, float v) +{ + return (TIFFWriteRationalArray(tif, type, tag, dir, 1, &v)); +} +#endif + +#define NITEMS(x) (sizeof (x) / sizeof (x[0])) +/* + * Setup a directory entry that references a + * samples/pixel array of SHORT values and + * (potentially) write the associated indirect + * values. + */ +static int +TIFFWritePerSampleShorts(TIFF* tif, ttag_t tag, TIFFDirEntry* dir) +{ + uint16 buf[10], v; + uint16* w = buf; + int i, status, samples = tif->tif_dir.td_samplesperpixel; + + if (samples > NITEMS(buf)) + w = (uint16*) _TIFFmalloc(samples * sizeof (uint16)); + TIFFGetField(tif, tag, &v); + for (i = 0; i < samples; i++) + w[i] = v; + status = TIFFWriteShortArray(tif, TIFF_SHORT, tag, dir, samples, w); + if (w != buf) + _TIFFfree((char*) w); + return (status); +} + +/* + * Setup a directory entry that references a samples/pixel array of ``type'' + * values and (potentially) write the associated indirect values. The source + * data from TIFFGetField() for the specified tag must be returned as double. + */ +static int +TIFFWritePerSampleAnys(TIFF* tif, + TIFFDataType type, ttag_t tag, TIFFDirEntry* dir) +{ + double buf[10], v; + double* w = buf; + int i, status; + int samples = (int) tif->tif_dir.td_samplesperpixel; + + if (samples > NITEMS(buf)) + w = (double*) _TIFFmalloc(samples * sizeof (double)); + TIFFGetField(tif, tag, &v); + for (i = 0; i < samples; i++) + w[i] = v; + status = TIFFWriteAnyArray(tif, type, tag, dir, samples, w); + if (w != buf) + _TIFFfree(w); + return (status); +} +#undef NITEMS + +/* + * Setup a pair of shorts that are returned by + * value, rather than as a reference to an array. + */ +static int +TIFFSetupShortPair(TIFF* tif, ttag_t tag, TIFFDirEntry* dir) +{ + uint16 v[2]; + + TIFFGetField(tif, tag, &v[0], &v[1]); + return (TIFFWriteShortArray(tif, TIFF_SHORT, tag, dir, 2, v)); +} + +/* + * Setup a directory entry for an NxM table of shorts, + * where M is known to be 2**bitspersample, and write + * the associated indirect data. + */ +static int +TIFFWriteShortTable(TIFF* tif, + ttag_t tag, TIFFDirEntry* dir, uint32 n, uint16** table) +{ + uint32 i, off; + + dir->tdir_tag = tag; + dir->tdir_type = (short) TIFF_SHORT; + /* XXX -- yech, fool TIFFWriteData */ + dir->tdir_count = (uint32) (1L<<tif->tif_dir.td_bitspersample); + off = tif->tif_dataoff; + for (i = 0; i < n; i++) + if (!TIFFWriteData(tif, dir, (char *)table[i])) + return (0); + dir->tdir_count *= n; + dir->tdir_offset = off; + return (1); +} + +/* + * Write/copy data associated with an ASCII or opaque tag value. + */ +static int +TIFFWriteByteArray(TIFF* tif, TIFFDirEntry* dir, char* cp) +{ + if (dir->tdir_count > 4) { + if (!TIFFWriteData(tif, dir, cp)) + return (0); + } else + _TIFFmemcpy(&dir->tdir_offset, cp, dir->tdir_count); + return (1); +} + +/* + * Setup a directory entry of an array of SHORT + * or SSHORT and write the associated indirect values. + */ +static int +TIFFWriteShortArray(TIFF* tif, + TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, uint16* v) +{ + dir->tdir_tag = tag; + dir->tdir_type = (short) type; + dir->tdir_count = n; + if (n <= 2) { + if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) { + dir->tdir_offset = (uint32) ((long) v[0] << 16); + if (n == 2) + dir->tdir_offset |= v[1] & 0xffff; + } else { + dir->tdir_offset = v[0] & 0xffff; + if (n == 2) + dir->tdir_offset |= (long) v[1] << 16; + } + return (1); + } else + return (TIFFWriteData(tif, dir, (char*) v)); +} + +/* + * Setup a directory entry of an array of LONG + * or SLONG and write the associated indirect values. + */ +static int +TIFFWriteLongArray(TIFF* tif, + TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, uint32* v) +{ + dir->tdir_tag = tag; + dir->tdir_type = (short) type; + dir->tdir_count = n; + if (n == 1) { + dir->tdir_offset = v[0]; + return (1); + } else + return (TIFFWriteData(tif, dir, (char*) v)); +} + +/* + * Setup a directory entry of an array of RATIONAL + * or SRATIONAL and write the associated indirect values. + */ +static int +TIFFWriteRationalArray(TIFF* tif, + TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, float* v) +{ + uint32 i; + uint32* t; + int status; + + dir->tdir_tag = tag; + dir->tdir_type = (short) type; + dir->tdir_count = n; + t = (uint32*) _TIFFmalloc(2*n * sizeof (uint32)); + for (i = 0; i < n; i++) { + float fv = v[i]; + int sign = 1; + uint32 den; + + if (fv < 0) { + if (type == TIFF_RATIONAL) { + TIFFWarning(tif->tif_name, + "\"%s\": Information lost writing value (%g) as (unsigned) RATIONAL", + _TIFFFieldWithTag(tif,tag)->field_name, v); + fv = 0; + } else + fv = -fv, sign = -1; + } + den = 1L; + if (fv > 0) { + while (fv < 1L<<(31-3) && den < 1L<<(31-3)) + fv *= 1<<3, den *= 1L<<3; + } + t[2*i+0] = sign * (fv + 0.5); + t[2*i+1] = den; + } + status = TIFFWriteData(tif, dir, (char *)t); + _TIFFfree((char*) t); + return (status); +} + +static int +TIFFWriteFloatArray(TIFF* tif, + TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, float* v) +{ + dir->tdir_tag = tag; + dir->tdir_type = (short) type; + dir->tdir_count = n; + TIFFCvtNativeToIEEEFloat(tif, n, v); + if (n == 1) { + dir->tdir_offset = *(uint32*) &v[0]; + return (1); + } else + return (TIFFWriteData(tif, dir, (char*) v)); +} + +static int +TIFFWriteDoubleArray(TIFF* tif, + TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, double* v) +{ + dir->tdir_tag = tag; + dir->tdir_type = (short) type; + dir->tdir_count = n; + TIFFCvtNativeToIEEEDouble(tif, n, v); + return (TIFFWriteData(tif, dir, (char*) v)); +} + +/* + * Write an array of ``type'' values for a specified tag (i.e. this is a tag + * which is allowed to have different types, e.g. SMaxSampleType). + * Internally the data values are represented as double since a double can + * hold any of the TIFF tag types (yes, this should really be an abstract + * type tany_t for portability). The data is converted into the specified + * type in a temporary buffer and then handed off to the appropriate array + * writer. + */ +static int +TIFFWriteAnyArray(TIFF* tif, + TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, double* v) +{ + char buf[10 * sizeof(double)]; + char* w = buf; + int i, status = 0; + + if (n * TIFFDataWidth(type) > sizeof buf) + w = (char*) _TIFFmalloc(n * TIFFDataWidth(type)); + switch (type) { + case TIFF_BYTE: + { unsigned char* bp = (unsigned char*) w; + for (i = 0; i < n; i++) + bp[i] = (unsigned char) v[i]; + dir->tdir_tag = tag; + dir->tdir_type = (short) type; + dir->tdir_count = n; + if (!TIFFWriteByteArray(tif, dir, (char*) bp)) + goto out; + } + break; + case TIFF_SBYTE: + { signed char* bp = (signed char*) w; + for (i = 0; i < n; i++) + bp[i] = (signed char) v[i]; + dir->tdir_tag = tag; + dir->tdir_type = (short) type; + dir->tdir_count = n; + if (!TIFFWriteByteArray(tif, dir, (char*) bp)) + goto out; + } + break; + case TIFF_SHORT: + { uint16* bp = (uint16*) w; + for (i = 0; i < n; i++) + bp[i] = (uint16) v[i]; + if (!TIFFWriteShortArray(tif, type, tag, dir, n, (uint16*)bp)) + goto out; + } + break; + case TIFF_SSHORT: + { int16* bp = (int16*) w; + for (i = 0; i < n; i++) + bp[i] = (int16) v[i]; + if (!TIFFWriteShortArray(tif, type, tag, dir, n, (uint16*)bp)) + goto out; + } + break; + case TIFF_LONG: + { uint32* bp = (uint32*) w; + for (i = 0; i < n; i++) + bp[i] = (uint32) v[i]; + if (!TIFFWriteLongArray(tif, type, tag, dir, n, bp)) + goto out; + } + break; + case TIFF_SLONG: + { int32* bp = (int32*) w; + for (i = 0; i < n; i++) + bp[i] = (int32) v[i]; + if (!TIFFWriteLongArray(tif, type, tag, dir, n, (uint32*) bp)) + goto out; + } + break; + case TIFF_FLOAT: + { float* bp = (float*) w; + for (i = 0; i < n; i++) + bp[i] = (float) v[i]; + if (!TIFFWriteFloatArray(tif, type, tag, dir, n, bp)) + goto out; + } + break; + case TIFF_DOUBLE: + return (TIFFWriteDoubleArray(tif, type, tag, dir, n, v)); + default: + /* TIFF_NOTYPE */ + /* TIFF_ASCII */ + /* TIFF_UNDEFINED */ + /* TIFF_RATIONAL */ + /* TIFF_SRATIONAL */ + goto out; + } + status = 1; + out: + if (w != buf) + _TIFFfree(w); + return (status); +} + +#ifdef COLORIMETRY_SUPPORT +static int +TIFFWriteTransferFunction(TIFF* tif, TIFFDirEntry* dir) +{ + TIFFDirectory* td = &tif->tif_dir; + tsize_t n = (1L<<td->td_bitspersample) * sizeof (uint16); + uint16** tf = td->td_transferfunction; + int ncols; + + /* + * Check if the table can be written as a single column, + * or if it must be written as 3 columns. Note that we + * write a 3-column tag if there are 2 samples/pixel and + * a single column of data won't suffice--hmm. + */ + switch (td->td_samplesperpixel - td->td_extrasamples) { + default: if (_TIFFmemcmp(tf[0], tf[2], n)) { ncols = 3; break; } + case 2: if (_TIFFmemcmp(tf[0], tf[1], n)) { ncols = 3; break; } + case 1: case 0: ncols = 1; + } + return (TIFFWriteShortTable(tif, + TIFFTAG_TRANSFERFUNCTION, dir, ncols, tf)); +} +#endif + +/* + * Write a contiguous directory item. + */ +static int +TIFFWriteData(TIFF* tif, TIFFDirEntry* dir, char* cp) +{ + tsize_t cc; + + if (tif->tif_flags & TIFF_SWAB) { + switch (dir->tdir_type) { + case TIFF_SHORT: + case TIFF_SSHORT: + TIFFSwabArrayOfShort((uint16*) cp, dir->tdir_count); + break; + case TIFF_LONG: + case TIFF_SLONG: + case TIFF_FLOAT: + TIFFSwabArrayOfLong((uint32*) cp, dir->tdir_count); + break; + case TIFF_RATIONAL: + case TIFF_SRATIONAL: + TIFFSwabArrayOfLong((uint32*) cp, 2*dir->tdir_count); + break; + case TIFF_DOUBLE: + TIFFSwabArrayOfDouble((double*) cp, dir->tdir_count); + break; + } + } + dir->tdir_offset = tif->tif_dataoff; + cc = dir->tdir_count * TIFFDataWidth(dir->tdir_type); + if (SeekOK(tif, dir->tdir_offset) && + WriteOK(tif, cp, cc)) { + tif->tif_dataoff += (cc + 1) & ~1; + return (1); + } + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing data for field \"%s\"", + _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); + return (0); +} + +/* + * Link the current directory into the + * directory chain for the file. + */ +static int +TIFFLinkDirectory(TIFF* tif) +{ + static const char module[] = "TIFFLinkDirectory"; + uint32 nextdir; + uint32 diroff; + + tif->tif_diroff = (TIFFSeekFile(tif, (toff_t) 0, SEEK_END)+1) &~ 1; + diroff = (uint32) tif->tif_diroff; + if (tif->tif_flags & TIFF_SWAB) + TIFFSwabLong(&diroff); +#if SUBIFD_SUPPORT + if (tif->tif_flags & TIFF_INSUBIFD) { + (void) TIFFSeekFile(tif, tif->tif_subifdoff, SEEK_SET); + if (!WriteOK(tif, &diroff, sizeof (diroff))) { + TIFFErrorExt(tif->tif_clientdata, module, + "%s: Error writing SubIFD directory link", + tif->tif_name); + return (0); + } + /* + * Advance to the next SubIFD or, if this is + * the last one configured, revert back to the + * normal directory linkage. + */ + if (--tif->tif_nsubifd) + tif->tif_subifdoff += sizeof (diroff); + else + tif->tif_flags &= ~TIFF_INSUBIFD; + return (1); + } +#endif + if (tif->tif_header.tiff_diroff == 0) { + /* + * First directory, overwrite offset in header. + */ + tif->tif_header.tiff_diroff = (uint32) tif->tif_diroff; +#define HDROFF(f) ((toff_t) &(((TIFFHeader*) 0)->f)) + (void) TIFFSeekFile(tif, HDROFF(tiff_diroff), SEEK_SET); + if (!WriteOK(tif, &diroff, sizeof (diroff))) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing TIFF header"); + return (0); + } + return (1); + } + /* + * Not the first directory, search to the last and append. + */ + nextdir = tif->tif_header.tiff_diroff; + do { + uint16 dircount; + + if (!SeekOK(tif, nextdir) || + !ReadOK(tif, &dircount, sizeof (dircount))) { + TIFFErrorExt(tif->tif_clientdata, module, "Error fetching directory count"); + return (0); + } + if (tif->tif_flags & TIFF_SWAB) + TIFFSwabShort(&dircount); + (void) TIFFSeekFile(tif, + dircount * sizeof (TIFFDirEntry), SEEK_CUR); + if (!ReadOK(tif, &nextdir, sizeof (nextdir))) { + TIFFErrorExt(tif->tif_clientdata, module, "Error fetching directory link"); + return (0); + } + if (tif->tif_flags & TIFF_SWAB) + TIFFSwabLong(&nextdir); + } while (nextdir != 0); + (void) TIFFSeekFile(tif, -(toff_t) sizeof (nextdir), SEEK_CUR); + if (!WriteOK(tif, &diroff, sizeof (diroff))) { + TIFFErrorExt(tif->tif_clientdata, module, "Error writing directory link"); + return (0); + } + return (1); +} +/* + * Local Variables: + * mode: c + * c-basic-offset: 8 + * fill-column: 78 + * End: + */ |