| /* $Id: tif_dir.c,v 1.28 2009/09/06 13:11:27 drolon 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) { |
| tsize_t bytes = 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 _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)); } |
| |
| /* |
| * 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 = va_arg(ap, uint32); |
| 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 (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, ttag_t 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 = 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 == 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 = va_arg(ap, uint32) & 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)) != 0 ) |
| td->td_compression = (uint16) v; |
| else |
| status = 0; |
| 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, uint32); |
| if (v != FILLORDER_LSB2MSB && v != FILLORDER_MSB2LSB) |
| goto badvalue; |
| td->td_fillorder = (uint16) v; |
| break; |
| case TIFFTAG_ORIENTATION: |
| v = va_arg(ap, uint32); |
| if (v < ORIENTATION_TOPLEFT || ORIENTATION_LEFTBOT < v) |
| goto badvalue; |
| else |
| td->td_orientation = (uint16) v; |
| break; |
| case TIFFTAG_SAMPLESPERPIXEL: |
| /* XXX should cross check -- e.g. if pallette, then 1 */ |
| v = va_arg(ap, uint32); |
| 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 = va_arg(ap, double); |
| break; |
| case TIFFTAG_SMAXSAMPLEVALUE: |
| td->td_smaxsamplevalue = va_arg(ap, double); |
| 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 = va_arg(ap, uint32); |
| 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 = va_arg(ap, uint32); |
| 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; |
| 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 = 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 = va_arg(ap, uint32); |
| if (v32 == 0) |
| goto badvalue32; |
| td->td_tiledepth = v32; |
| break; |
| case TIFFTAG_DATATYPE: |
| v = va_arg(ap, uint32); |
| 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, uint32); |
| 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 = va_arg(ap, uint32); |
| break; |
| 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 { |
| 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, int); |
| break; |
| case TIFFTAG_YCBCRSUBSAMPLING: |
| td->td_ycbcrsubsampling[0] = (uint16) va_arg(ap, int); |
| td->td_ycbcrsubsampling[1] = (uint16) va_arg(ap, int); |
| 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_INKNAMES: |
| v = va_arg(ap, uint32); |
| 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; |
| default: { |
| TIFFTagValue *tv; |
| int tv_size, iCustom; |
| const TIFFFieldInfo* fip = _TIFFFindFieldInfo(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_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 (fip->field_type == TIFF_ASCII) |
| _TIFFsetString((char **)&tv->value, va_arg(ap, char *)); |
| else { |
| tv->value = _TIFFCheckMalloc(tif, tv_size, tv->count, |
| "Tag Value"); |
| 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_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) { |
| TIFFSetFieldBit(tif, _TIFFFieldWithTag(tif, tag)->field_bit); |
| tif->tif_flags |= TIFF_DIRTYDIRECT; |
| } |
| |
| end: |
| va_end(ap); |
| return (status); |
| badvalue: |
| TIFFErrorExt(tif->tif_clientdata, module, |
| "%s: Bad value %d for \"%s\" tag", |
| tif->tif_name, v, |
| _TIFFFieldWithTag(tif, tag)->field_name); |
| va_end(ap); |
| return (0); |
| badvalue32: |
| TIFFErrorExt(tif->tif_clientdata, module, |
| "%s: Bad value %u for \"%s\" tag", |
| tif->tif_name, 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 */ |
| 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, 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_tagmethods.vsetfield)(tif, tag, ap) : 0; |
| } |
| |
| static int |
| _TIFFVGetField(TIFF* tif, ttag_t 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: |
| *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_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; |
| case TIFFTAG_SUBIFD: |
| *va_arg(ap, uint16*) = td->td_nsubifd; |
| *va_arg(ap, uint32**) = 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_INKNAMES: |
| *va_arg(ap, char**) = td->td_inknames; |
| break; |
| default: |
| { |
| const TIFFFieldInfo* fip = _TIFFFindFieldInfo(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_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, 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_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_colormap[0]); |
| CleanupField(td_colormap[1]); |
| CleanupField(td_colormap[2]); |
| CleanupField(td_sampleinfo); |
| CleanupField(td_subifd); |
| CleanupField(td_inknames); |
| 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); |
| } |
| #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 = (tstrip_t) -1; |
| |
| return 0; |
| } |
| |
| /* |
| * Setup a default directory structure. |
| */ |
| int |
| TIFFDefaultDirectory(TIFF* tif) |
| { |
| register TIFFDirectory* td = &tif->tif_dir; |
| |
| size_t tiffFieldInfoCount; |
| const TIFFFieldInfo *tiffFieldInfo = |
| _TIFFGetFieldInfo(&tiffFieldInfoCount); |
| _TIFFSetupFieldInfo(tif, tiffFieldInfo, tiffFieldInfoCount); |
| |
| _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, uint32* nextdir, toff_t* off) |
| { |
| static const char module[] = "TIFFAdvanceDirectory"; |
| uint16 dircount; |
| if (isMapped(tif)) |
| { |
| toff_t poff=*nextdir; |
| if (poff+sizeof(uint16) > tif->tif_size) |
| { |
| TIFFErrorExt(tif->tif_clientdata, module, "%s: Error fetching directory count", |
| tif->tif_name); |
| return (0); |
| } |
| _TIFFmemcpy(&dircount, tif->tif_base+poff, sizeof (uint16)); |
| if (tif->tif_flags & TIFF_SWAB) |
| TIFFSwabShort(&dircount); |
| poff+=sizeof (uint16)+dircount*sizeof (TIFFDirEntry); |
| if (off != NULL) |
| *off = poff; |
| if (((toff_t) (poff+sizeof (uint32))) > tif->tif_size) |
| { |
| TIFFErrorExt(tif->tif_clientdata, module, "%s: Error fetching directory link", |
| tif->tif_name); |
| return (0); |
| } |
| _TIFFmemcpy(nextdir, tif->tif_base+poff, sizeof (uint32)); |
| if (tif->tif_flags & TIFF_SWAB) |
| TIFFSwabLong(nextdir); |
| return (1); |
| } |
| else |
| { |
| 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*sizeof (TIFFDirEntry), SEEK_CUR); |
| else |
| (void) TIFFSeekFile(tif, |
| dircount*sizeof (TIFFDirEntry), SEEK_CUR); |
| if (!ReadOK(tif, nextdir, sizeof (uint32))) { |
| TIFFErrorExt(tif->tif_clientdata, module, "%s: Error fetching directory link", |
| tif->tif_name); |
| return (0); |
| } |
| if (tif->tif_flags & TIFF_SWAB) |
| TIFFSwabLong(nextdir); |
| return (1); |
| } |
| } |
| |
| /* |
| * Count the number of directories in a file. |
| */ |
| tdir_t |
| TIFFNumberOfDirectories(TIFF* tif) |
| { |
| toff_t nextdir = tif->tif_header.tiff_diroff; |
| tdir_t 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, tdir_t dirn) |
| { |
| toff_t 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; |
| /* |
| * 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, uint32 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. |
| */ |
| 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"; |
| toff_t nextdir; |
| toff_t off; |
| tdir_t 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. |
| */ |
| nextdir = tif->tif_header.tiff_diroff; |
| off = sizeof (uint16) + sizeof (uint16); |
| 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_SWAB) |
| TIFFSwabLong(&nextdir); |
| if (!WriteOK(tif, &nextdir, sizeof (uint32))) { |
| 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_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); |
| } |
| |
| /* [BFC] |
| * |
| * Author: Bruce Cameron <cameron@petris.com> |
| * |
| * Set a table of tags that are to be replaced during directory process by the |
| * 'IGNORE' state - or return TRUE/FALSE for the requested tag such that |
| * 'ReadDirectory' can use the stored information. |
| * |
| * FIXME: this is never used properly. Should be removed in the future. |
| */ |
| int |
| TIFFReassignTagToIgnore (enum TIFFIgnoreSense task, int TIFFtagID) |
| { |
| static int TIFFignoretags [FIELD_LAST]; |
| static int tagcount = 0 ; |
| int i; /* Loop index */ |
| int j; /* Loop index */ |
| |
| switch (task) |
| { |
| case TIS_STORE: |
| if ( tagcount < (FIELD_LAST - 1) ) |
| { |
| for ( j = 0 ; j < tagcount ; ++j ) |
| { /* Do not add duplicate tag */ |
| if ( TIFFignoretags [j] == TIFFtagID ) |
| return (TRUE) ; |
| } |
| TIFFignoretags [tagcount++] = TIFFtagID ; |
| return (TRUE) ; |
| } |
| break ; |
| |
| case TIS_EXTRACT: |
| for ( i = 0 ; i < tagcount ; ++i ) |
| { |
| if ( TIFFignoretags [i] == TIFFtagID ) |
| return (TRUE) ; |
| } |
| break; |
| |
| case TIS_EMPTY: |
| tagcount = 0 ; /* Clear the list */ |
| return (TRUE) ; |
| |
| default: |
| break; |
| } |
| |
| return (FALSE); |
| } |
| |
| /* vim: set ts=8 sts=8 sw=8 noet: */ |