diff options
Diffstat (limited to 'plugins/AdvaImg/src/LibTIFF/tif_dir.c')
| -rw-r--r-- | plugins/AdvaImg/src/LibTIFF/tif_dir.c | 1391 |
1 files changed, 1391 insertions, 0 deletions
diff --git a/plugins/AdvaImg/src/LibTIFF/tif_dir.c b/plugins/AdvaImg/src/LibTIFF/tif_dir.c new file mode 100644 index 0000000000..081bb43c06 --- /dev/null +++ b/plugins/AdvaImg/src/LibTIFF/tif_dir.c @@ -0,0 +1,1391 @@ +/* $Id: tif_dir.c,v 1.38 2011/04/10 17:14:09 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 == 8)
+ tif->tif_postdecode = _TIFFNoPostDecode;
+ else if (td->td_bitspersample == 16)
+ tif->tif_postdecode = _TIFFSwab16BitData;
+ else if (td->td_bitspersample == 24)
+ tif->tif_postdecode = _TIFFSwab24BitData;
+ else if (td->td_bitspersample == 32)
+ tif->tif_postdecode = _TIFFSwab32BitData;
+ else if (td->td_bitspersample == 64)
+ tif->tif_postdecode = _TIFFSwab64BitData;
+ else if (td->td_bitspersample == 128) /* two 64's */
+ tif->tif_postdecode = _TIFFSwab64BitData;
+ }
+ break;
+ case TIFFTAG_COMPRESSION:
+ v = 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_REFERENCEBLACKWHITE:
+ /* XXX should check for null range */
+ _TIFFsetFloatArray(&td->td_refblackwhite, va_arg(ap, float*), 6);
+ 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_REFERENCEBLACKWHITE:
+ *va_arg(ap, float**) = td->td_refblackwhite;
+ 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_refblackwhite);
+ CleanupField(td_transferfunction[0]);
+ CleanupField(td_transferfunction[1]);
+ CleanupField(td_transferfunction[2]);
+ CleanupField(td_stripoffset);
+ CleanupField(td_stripbytecount);
+ TIFFClrFieldBit(tif, FIELD_YCBCRSUBSAMPLING);
+ TIFFClrFieldBit(tif, FIELD_YCBCRPOSITIONING);
+
+ /* Cleanup custom tag values */
+ for ( i = 0; i < td->td_customValueCount; i++ ) {
+ if (td->td_customValues[i].value)
+ _TIFFfree(td->td_customValues[i].value);
+ }
+
+ td->td_customValueCount = 0;
+ CleanupField(td_customValues);
+}
+#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;
+ /*
+ * Clear other directory-specific fields.
+ */
+ tif->tif_tilesize = -1;
+ tif->tif_scanlinesize = -1;
+
+ 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: */
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 8
+ * fill-column: 78
+ * End:
+ */
|