--- /dev/null
+/* $Header$ */
+
+/*
+ * 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 Read Support Routines.
+ */
+#include "tiffiop.h"
+
+#define IGNORE 0 /* tag placeholder used below */
+
+#if HAVE_IEEEFP
+#define TIFFCvtIEEEFloatToNative(tif, n, fp)
+#define TIFFCvtIEEEDoubleToNative(tif, n, dp)
+#else
+extern void TIFFCvtIEEEFloatToNative(TIFF*, uint32, float*);
+extern void TIFFCvtIEEEDoubleToNative(TIFF*, uint32, double*);
+#endif
+
+static void EstimateStripByteCounts(TIFF*, TIFFDirEntry*, uint16);
+static void MissingRequired(TIFF*, const char*);
+static int CheckDirCount(TIFF*, TIFFDirEntry*, uint32);
+static tsize_t TIFFFetchData(TIFF*, TIFFDirEntry*, char*);
+static tsize_t TIFFFetchString(TIFF*, TIFFDirEntry*, char*);
+static float TIFFFetchRational(TIFF*, TIFFDirEntry*);
+static int TIFFFetchNormalTag(TIFF*, TIFFDirEntry*);
+static int TIFFFetchPerSampleShorts(TIFF*, TIFFDirEntry*, int*);
+static int TIFFFetchPerSampleAnys(TIFF*, TIFFDirEntry*, double*);
+static int TIFFFetchShortArray(TIFF*, TIFFDirEntry*, uint16*);
+static int TIFFFetchStripThing(TIFF*, TIFFDirEntry*, long, uint32**);
+static int TIFFFetchExtraSamples(TIFF*, TIFFDirEntry*);
+static int TIFFFetchRefBlackWhite(TIFF*, TIFFDirEntry*);
+static float TIFFFetchFloat(TIFF*, TIFFDirEntry*);
+static int TIFFFetchFloatArray(TIFF*, TIFFDirEntry*, float*);
+static int TIFFFetchDoubleArray(TIFF*, TIFFDirEntry*, double*);
+static int TIFFFetchAnyArray(TIFF*, TIFFDirEntry*, double*);
+static int TIFFFetchShortPair(TIFF*, TIFFDirEntry*);
+static void ChopUpSingleUncompressedStrip(TIFF*);
+
+static char *
+CheckMalloc(TIFF* tif, tsize_t n, const char* what)
+{
+ char *cp = (char*)_TIFFmalloc(n);
+ if (cp == NULL)
+ TIFFError(tif->tif_name, "No space %s", what);
+ return (cp);
+}
+
+/*
+ * Read the next TIFF directory from a file
+ * and convert it to the internal format.
+ * We read directories sequentially.
+ */
+int
+TIFFReadDirectory(TIFF* tif)
+{
+ register TIFFDirEntry* dp;
+ register int n;
+ register TIFFDirectory* td;
+ TIFFDirEntry* dir;
+ int iv;
+ long v;
+ double dv;
+ const TIFFFieldInfo* fip;
+ int fix;
+ uint16 dircount;
+ uint32 nextdiroff;
+ char* cp;
+ int diroutoforderwarning = 0;
+
+ tif->tif_diroff = tif->tif_nextdiroff;
+ if (tif->tif_diroff == 0) /* no more directories */
+ return (0);
+ /*
+ * Cleanup any previous compression state.
+ */
+ (*tif->tif_cleanup)(tif);
+ tif->tif_curdir++;
+ nextdiroff = 0;
+ if (!isMapped(tif)) {
+ if (!SeekOK(tif, tif->tif_diroff)) {
+ TIFFError(tif->tif_name,
+ "Seek error accessing TIFF directory");
+ return (0);
+ }
+ if (!ReadOK(tif, &dircount, sizeof (uint16))) {
+ TIFFError(tif->tif_name,
+ "Can not read TIFF directory count");
+ return (0);
+ }
+ if (tif->tif_flags & TIFF_SWAB)
+ TIFFSwabShort(&dircount);
+ dir = (TIFFDirEntry *)CheckMalloc(tif,
+ dircount * sizeof (TIFFDirEntry), "to read TIFF directory");
+ if (dir == NULL)
+ return (0);
+ if (!ReadOK(tif, dir, dircount*sizeof (TIFFDirEntry))) {
+ TIFFError(tif->tif_name, "Can not read TIFF directory");
+ goto bad;
+ }
+ /*
+ * Read offset to next directory for sequential scans.
+ */
+ (void) ReadOK(tif, &nextdiroff, sizeof (uint32));
+ } else {
+ toff_t off = tif->tif_diroff;
+
+ if (off + sizeof (uint16) > tif->tif_size) {
+ TIFFError(tif->tif_name,
+ "Can not read TIFF directory count");
+ return (0);
+ } else
+ _TIFFmemcpy(&dircount, tif->tif_base + off, sizeof (uint16));
+ off += sizeof (uint16);
+ if (tif->tif_flags & TIFF_SWAB)
+ TIFFSwabShort(&dircount);
+ dir = (TIFFDirEntry *)CheckMalloc(tif,
+ dircount * sizeof (TIFFDirEntry), "to read TIFF directory");
+ if (dir == NULL)
+ return (0);
+ if (off + dircount*sizeof (TIFFDirEntry) > tif->tif_size) {
+ TIFFError(tif->tif_name, "Can not read TIFF directory");
+ goto bad;
+ } else
+ _TIFFmemcpy(dir, tif->tif_base + off,
+ dircount*sizeof (TIFFDirEntry));
+ off += dircount* sizeof (TIFFDirEntry);
+ if (off + sizeof (uint32) <= tif->tif_size)
+ _TIFFmemcpy(&nextdiroff, tif->tif_base+off, sizeof (uint32));
+ }
+ if (tif->tif_flags & TIFF_SWAB)
+ TIFFSwabLong(&nextdiroff);
+ tif->tif_nextdiroff = nextdiroff;
+
+ tif->tif_flags &= ~TIFF_BEENWRITING; /* reset before new dir */
+ /*
+ * Setup default value and then make a pass over
+ * the fields to check type and tag information,
+ * and to extract info required to size data
+ * structures. A second pass is made afterwards
+ * to read in everthing not taken in the first pass.
+ */
+ td = &tif->tif_dir;
+ /* free any old stuff and reinit */
+ TIFFFreeDirectory(tif);
+ TIFFDefaultDirectory(tif);
+ /*
+ * Electronic Arts writes gray-scale TIFF files
+ * without a PlanarConfiguration directory entry.
+ * Thus we setup a default value here, even though
+ * the TIFF spec says there is no default value.
+ */
+ TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
+
+ /*
+ * Sigh, we must make a separate pass through the
+ * directory for the following reason:
+ *
+ * We must process the Compression tag in the first pass
+ * in order to merge in codec-private tag definitions (otherwise
+ * we may get complaints about unknown tags). However, the
+ * Compression tag may be dependent on the SamplesPerPixel
+ * tag value because older TIFF specs permited Compression
+ * to be written as a SamplesPerPixel-count tag entry.
+ * Thus if we don't first figure out the correct SamplesPerPixel
+ * tag value then we may end up ignoring the Compression tag
+ * value because it has an incorrect count value (if the
+ * true value of SamplesPerPixel is not 1).
+ *
+ * It sure would have been nice if Aldus had really thought
+ * this stuff through carefully.
+ */
+ for (dp = dir, n = dircount; n > 0; n--, dp++) {
+ if (tif->tif_flags & TIFF_SWAB) {
+ TIFFSwabArrayOfShort(&dp->tdir_tag, 2);
+ TIFFSwabArrayOfLong(&dp->tdir_count, 2);
+ }
+ if (dp->tdir_tag == TIFFTAG_SAMPLESPERPIXEL) {
+ if (!TIFFFetchNormalTag(tif, dp))
+ goto bad;
+ dp->tdir_tag = IGNORE;
+ }
+ }
+ /*
+ * First real pass over the directory.
+ */
+ fix = 0;
+ for (dp = dir, n = dircount; n > 0; n--, dp++) {
+
+ /*
+ * Find the field information entry for this tag.
+ * Added check for tags to ignore ... [BFC]
+ */
+ if( TIFFReassignTagToIgnore(TIS_EXTRACT, dp->tdir_tag) )
+ dp->tdir_tag = IGNORE;
+
+ if (dp->tdir_tag == IGNORE)
+ continue;
+
+ /*
+ * Silicon Beach (at least) writes unordered
+ * directory tags (violating the spec). Handle
+ * it here, but be obnoxious (maybe they'll fix it?).
+ */
+ if (dp->tdir_tag < tif->tif_fieldinfo[fix]->field_tag) {
+ if (!diroutoforderwarning) {
+ TIFFWarning(tif->tif_name,
+ "invalid TIFF directory; tags are not sorted in ascending order");
+ diroutoforderwarning = 1;
+ }
+ fix = 0; /* O(n^2) */
+ }
+ while (fix < tif->tif_nfields &&
+ tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag)
+ fix++;
+ if (fix == tif->tif_nfields ||
+ tif->tif_fieldinfo[fix]->field_tag != dp->tdir_tag) {
+ TIFFWarning(tif->tif_name,
+ "unknown field with tag %d (0x%x) ignored",
+ dp->tdir_tag, dp->tdir_tag);
+ dp->tdir_tag = IGNORE;
+ fix = 0; /* restart search */
+ continue;
+ }
+ /*
+ * Null out old tags that we ignore.
+ */
+ if (tif->tif_fieldinfo[fix]->field_bit == FIELD_IGNORE) {
+ ignore:
+ dp->tdir_tag = IGNORE;
+ continue;
+ }
+ /*
+ * Check data type.
+ */
+ fip = tif->tif_fieldinfo[fix];
+ while (dp->tdir_type != (u_short) fip->field_type) {
+ if (fip->field_type == TIFF_ANY) /* wildcard */
+ break;
+ fip++, fix++;
+ if (fix == tif->tif_nfields ||
+ fip->field_tag != dp->tdir_tag) {
+ TIFFWarning(tif->tif_name,
+ "wrong data type %d for \"%s\"; tag ignored",
+ dp->tdir_type, fip[-1].field_name);
+ goto ignore;
+ }
+ }
+ /*
+ * Check count if known in advance.
+ */
+ if (fip->field_readcount != TIFF_VARIABLE) {
+ uint32 expected = (fip->field_readcount == TIFF_SPP) ?
+ (uint32) td->td_samplesperpixel :
+ (uint32) fip->field_readcount;
+ if (!CheckDirCount(tif, dp, expected))
+ goto ignore;
+ }
+
+ switch (dp->tdir_tag) {
+ case TIFFTAG_COMPRESSION:
+ /*
+ * The 5.0 spec says the Compression tag has
+ * one value, while earlier specs say it has
+ * one value per sample. Because of this, we
+ * accept the tag if one value is supplied.
+ */
+ if (dp->tdir_count == 1) {
+ v = TIFFExtractData(tif,
+ dp->tdir_type, dp->tdir_offset);
+ if (!TIFFSetField(tif, dp->tdir_tag, (int)v))
+ goto bad;
+ break;
+ }
+ if (!TIFFFetchPerSampleShorts(tif, dp, &iv) ||
+ !TIFFSetField(tif, dp->tdir_tag, iv))
+ goto bad;
+ dp->tdir_tag = IGNORE;
+ break;
+ case TIFFTAG_STRIPOFFSETS:
+ case TIFFTAG_STRIPBYTECOUNTS:
+ case TIFFTAG_TILEOFFSETS:
+ case TIFFTAG_TILEBYTECOUNTS:
+ TIFFSetFieldBit(tif, fip->field_bit);
+ break;
+ case TIFFTAG_IMAGEWIDTH:
+ case TIFFTAG_IMAGELENGTH:
+ case TIFFTAG_IMAGEDEPTH:
+ case TIFFTAG_TILELENGTH:
+ case TIFFTAG_TILEWIDTH:
+ case TIFFTAG_TILEDEPTH:
+ case TIFFTAG_PLANARCONFIG:
+ case TIFFTAG_ROWSPERSTRIP:
+ if (!TIFFFetchNormalTag(tif, dp))
+ goto bad;
+ dp->tdir_tag = IGNORE;
+ break;
+ case TIFFTAG_EXTRASAMPLES:
+ (void) TIFFFetchExtraSamples(tif, dp);
+ dp->tdir_tag = IGNORE;
+ break;
+ }
+ }
+
+ /*
+ * Allocate directory structure and setup defaults.
+ */
+ if (!TIFFFieldSet(tif, FIELD_IMAGEDIMENSIONS)) {
+ MissingRequired(tif, "ImageLength");
+ goto bad;
+ }
+ if (!TIFFFieldSet(tif, FIELD_PLANARCONFIG)) {
+ MissingRequired(tif, "PlanarConfiguration");
+ goto bad;
+ }
+ /*
+ * Setup appropriate structures (by strip or by tile)
+ */
+ if (!TIFFFieldSet(tif, FIELD_TILEDIMENSIONS)) {
+ td->td_nstrips = TIFFNumberOfStrips(tif);
+ td->td_tilewidth = td->td_imagewidth;
+ td->td_tilelength = td->td_rowsperstrip;
+ td->td_tiledepth = td->td_imagedepth;
+ tif->tif_flags &= ~TIFF_ISTILED;
+ } else {
+ td->td_nstrips = TIFFNumberOfTiles(tif);
+ tif->tif_flags |= TIFF_ISTILED;
+ }
+ td->td_stripsperimage = td->td_nstrips;
+ if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
+ td->td_stripsperimage /= td->td_samplesperpixel;
+ if (!TIFFFieldSet(tif, FIELD_STRIPOFFSETS)) {
+ MissingRequired(tif,
+ isTiled(tif) ? "TileOffsets" : "StripOffsets");
+ goto bad;
+ }
+
+ /*
+ * Second pass: extract other information.
+ */
+ for (dp = dir, n = dircount; n > 0; n--, dp++) {
+ if (dp->tdir_tag == IGNORE)
+ continue;
+ switch (dp->tdir_tag) {
+ case TIFFTAG_MINSAMPLEVALUE:
+ case TIFFTAG_MAXSAMPLEVALUE:
+ case TIFFTAG_BITSPERSAMPLE:
+ /*
+ * The 5.0 spec says the Compression tag has
+ * one value, while earlier specs say it has
+ * one value per sample. Because of this, we
+ * accept the tag if one value is supplied.
+ *
+ * The MinSampleValue, MaxSampleValue and
+ * BitsPerSample tags are supposed to be written
+ * as one value/sample, but some vendors incorrectly
+ * write one value only -- so we accept that
+ * as well (yech).
+ */
+ if (dp->tdir_count == 1) {
+ v = TIFFExtractData(tif,
+ dp->tdir_type, dp->tdir_offset);
+ if (!TIFFSetField(tif, dp->tdir_tag, (int)v))
+ goto bad;
+ break;
+ }
+ /* fall thru... */
+ case TIFFTAG_DATATYPE:
+ case TIFFTAG_SAMPLEFORMAT:
+ if (!TIFFFetchPerSampleShorts(tif, dp, &iv) ||
+ !TIFFSetField(tif, dp->tdir_tag, iv))
+ goto bad;
+ break;
+ case TIFFTAG_SMINSAMPLEVALUE:
+ case TIFFTAG_SMAXSAMPLEVALUE:
+ if (!TIFFFetchPerSampleAnys(tif, dp, &dv) ||
+ !TIFFSetField(tif, dp->tdir_tag, dv))
+ goto bad;
+ break;
+ case TIFFTAG_STRIPOFFSETS:
+ case TIFFTAG_TILEOFFSETS:
+ if (!TIFFFetchStripThing(tif, dp,
+ td->td_nstrips, &td->td_stripoffset))
+ goto bad;
+ break;
+ case TIFFTAG_STRIPBYTECOUNTS:
+ case TIFFTAG_TILEBYTECOUNTS:
+ if (!TIFFFetchStripThing(tif, dp,
+ td->td_nstrips, &td->td_stripbytecount))
+ goto bad;
+ break;
+ case TIFFTAG_COLORMAP:
+ case TIFFTAG_TRANSFERFUNCTION:
+ /*
+ * TransferFunction can have either 1x or 3x data
+ * values; Colormap can have only 3x items.
+ */
+ v = 1L<<td->td_bitspersample;
+ if (dp->tdir_tag == TIFFTAG_COLORMAP ||
+ dp->tdir_count != (uint32) v) {
+ if (!CheckDirCount(tif, dp, (uint32)(3*v)))
+ break;
+ }
+ v *= sizeof (uint16);
+ cp = CheckMalloc(tif, dp->tdir_count * sizeof (uint16),
+ "to read \"TransferFunction\" tag");
+ if (cp != NULL) {
+ if (TIFFFetchData(tif, dp, cp)) {
+ /*
+ * This deals with there being only
+ * one array to apply to all samples.
+ */
+ uint32 c =
+ (uint32)1 << td->td_bitspersample;
+ if (dp->tdir_count == c)
+ v = 0;
+ TIFFSetField(tif, dp->tdir_tag,
+ cp, cp+v, cp+2*v);
+ }
+ _TIFFfree(cp);
+ }
+ break;
+ case TIFFTAG_PAGENUMBER:
+ case TIFFTAG_HALFTONEHINTS:
+ case TIFFTAG_YCBCRSUBSAMPLING:
+ case TIFFTAG_DOTRANGE:
+ (void) TIFFFetchShortPair(tif, dp);
+ break;
+#ifdef COLORIMETRY_SUPPORT
+ case TIFFTAG_REFERENCEBLACKWHITE:
+ (void) TIFFFetchRefBlackWhite(tif, dp);
+ break;
+#endif
+/* BEGIN REV 4.0 COMPATIBILITY */
+ case TIFFTAG_OSUBFILETYPE:
+ v = 0;
+ switch (TIFFExtractData(tif, dp->tdir_type,
+ dp->tdir_offset)) {
+ case OFILETYPE_REDUCEDIMAGE:
+ v = FILETYPE_REDUCEDIMAGE;
+ break;
+ case OFILETYPE_PAGE:
+ v = FILETYPE_PAGE;
+ break;
+ }
+ if (v)
+ (void) TIFFSetField(tif,
+ TIFFTAG_SUBFILETYPE, (int)v);
+ break;
+/* END REV 4.0 COMPATIBILITY */
+ default:
+ (void) TIFFFetchNormalTag(tif, dp);
+ break;
+ }
+ }
+ /*
+ * Verify Palette image has a Colormap.
+ */
+ if (td->td_photometric == PHOTOMETRIC_PALETTE &&
+ !TIFFFieldSet(tif, FIELD_COLORMAP)) {
+ MissingRequired(tif, "Colormap");
+ goto bad;
+ }
+ /*
+ * Attempt to deal with a missing StripByteCounts tag.
+ */
+ if (!TIFFFieldSet(tif, FIELD_STRIPBYTECOUNTS)) {
+ /*
+ * Some manufacturers violate the spec by not giving
+ * the size of the strips. In this case, assume there
+ * is one uncompressed strip of data.
+ */
+ if ((td->td_planarconfig == PLANARCONFIG_CONTIG &&
+ td->td_nstrips > 1) ||
+ (td->td_planarconfig == PLANARCONFIG_SEPARATE &&
+ td->td_nstrips != td->td_samplesperpixel)) {
+ MissingRequired(tif, "StripByteCounts");
+ goto bad;
+ }
+ TIFFWarning(tif->tif_name,
+"TIFF directory is missing required \"%s\" field, calculating from imagelength",
+ _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name);
+ EstimateStripByteCounts(tif, dir, dircount);
+#define BYTECOUNTLOOKSBAD \
+ (td->td_stripbytecount[0] == 0 || \
+ (td->td_compression == COMPRESSION_NONE && \
+ td->td_stripbytecount[0] > TIFFGetFileSize(tif) - td->td_stripoffset[0]))
+ } else if (td->td_nstrips == 1 && BYTECOUNTLOOKSBAD) {
+ /*
+ * Plexus (and others) sometimes give a value
+ * of zero for a tag when they don't know what
+ * the correct value is! Try and handle the
+ * simple case of estimating the size of a one
+ * strip image.
+ */
+ TIFFWarning(tif->tif_name,
+ "Bogus \"%s\" field, ignoring and calculating from imagelength",
+ _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name);
+ EstimateStripByteCounts(tif, dir, dircount);
+ }
+ if (dir)
+ _TIFFfree((char *)dir);
+ if (!TIFFFieldSet(tif, FIELD_MAXSAMPLEVALUE))
+ td->td_maxsamplevalue = (uint16)((1L<<td->td_bitspersample)-1);
+ /*
+ * Setup default compression scheme.
+ */
+ if (!TIFFFieldSet(tif, FIELD_COMPRESSION))
+ TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
+ /*
+ * Some manufacturers make life difficult by writing
+ * large amounts of uncompressed data as a single strip.
+ * This is contrary to the recommendations of the spec.
+ * The following makes an attempt at breaking such images
+ * into strips closer to the recommended 8k bytes. A
+ * side effect, however, is that the RowsPerStrip tag
+ * value may be changed.
+ */
+ if (td->td_nstrips == 1 && td->td_compression == COMPRESSION_NONE &&
+ (tif->tif_flags & (TIFF_STRIPCHOP|TIFF_ISTILED)) == TIFF_STRIPCHOP)
+ ChopUpSingleUncompressedStrip(tif);
+ /*
+ * Reinitialize i/o since we are starting on a new directory.
+ */
+ tif->tif_row = (uint32) -1;
+ tif->tif_curstrip = (tstrip_t) -1;
+ tif->tif_col = (uint32) -1;
+ tif->tif_curtile = (ttile_t) -1;
+ tif->tif_tilesize = TIFFTileSize(tif);
+ tif->tif_scanlinesize = TIFFScanlineSize(tif);
+ return (1);
+bad:
+ if (dir)
+ _TIFFfree(dir);
+ return (0);
+}
+
+static void
+EstimateStripByteCounts(TIFF* tif, TIFFDirEntry* dir, uint16 dircount)
+{
+ register TIFFDirEntry *dp;
+ register TIFFDirectory *td = &tif->tif_dir;
+ uint16 i;
+
+ if (td->td_stripbytecount)
+ _TIFFfree(td->td_stripbytecount);
+ td->td_stripbytecount = (uint32*)
+ CheckMalloc(tif, td->td_nstrips * sizeof (uint32),
+ "for \"StripByteCounts\" array");
+ if (td->td_compression != COMPRESSION_NONE) {
+ uint32 space = (uint32)(sizeof (TIFFHeader)
+ + sizeof (uint16)
+ + (dircount * sizeof (TIFFDirEntry))
+ + sizeof (uint32));
+ toff_t filesize = TIFFGetFileSize(tif);
+ uint16 n;
+
+ /* calculate amount of space used by indirect values */
+ for (dp = dir, n = dircount; n > 0; n--, dp++) {
+ uint32 cc = dp->tdir_count*tiffDataWidth[dp->tdir_type];
+ if (cc > sizeof (uint32))
+ space += cc;
+ }
+ space = filesize - space;
+ if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
+ space /= td->td_samplesperpixel;
+ for (i = 0; i < td->td_nstrips; i++)
+ td->td_stripbytecount[i] = space;
+ /*
+ * This gross hack handles the case were the offset to
+ * the last strip is past the place where we think the strip
+ * should begin. Since a strip of data must be contiguous,
+ * it's safe to assume that we've overestimated the amount
+ * of data in the strip and trim this number back accordingly.
+ */
+ i--;
+ if (td->td_stripoffset[i] + td->td_stripbytecount[i] > filesize)
+ td->td_stripbytecount[i] =
+ filesize - td->td_stripoffset[i];
+ } else {
+ uint32 rowbytes = TIFFScanlineSize(tif);
+ uint32 rowsperstrip = td->td_imagelength/td->td_stripsperimage;
+ for (i = 0; i < td->td_nstrips; i++)
+ td->td_stripbytecount[i] = rowbytes*rowsperstrip;
+ }
+ TIFFSetFieldBit(tif, FIELD_STRIPBYTECOUNTS);
+ if (!TIFFFieldSet(tif, FIELD_ROWSPERSTRIP))
+ td->td_rowsperstrip = td->td_imagelength;
+}
+
+static void
+MissingRequired(TIFF* tif, const char* tagname)
+{
+ TIFFError(tif->tif_name,
+ "TIFF directory is missing required \"%s\" field", tagname);
+}
+
+/*
+ * Check the count field of a directory
+ * entry against a known value. The caller
+ * is expected to skip/ignore the tag if
+ * there is a mismatch.
+ */
+static int
+CheckDirCount(TIFF* tif, TIFFDirEntry* dir, uint32 count)
+{
+ if (count != dir->tdir_count) {
+ TIFFWarning(tif->tif_name,
+ "incorrect count for field \"%s\" (%lu, expecting %lu); tag ignored",
+ _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name,
+ dir->tdir_count, count);
+ return (0);
+ }
+ return (1);
+}
+
+/*
+ * Fetch a contiguous directory item.
+ */
+static tsize_t
+TIFFFetchData(TIFF* tif, TIFFDirEntry* dir, char* cp)
+{
+ int w = tiffDataWidth[dir->tdir_type];
+ tsize_t cc = dir->tdir_count * w;
+
+ if (!isMapped(tif)) {
+ if (!SeekOK(tif, dir->tdir_offset))
+ goto bad;
+ if (!ReadOK(tif, cp, cc))
+ goto bad;
+ } else {
+ if (dir->tdir_offset + cc > tif->tif_size)
+ goto bad;
+ _TIFFmemcpy(cp, tif->tif_base + dir->tdir_offset, 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;
+ }
+ }
+ return (cc);
+bad:
+ TIFFError(tif->tif_name, "Error fetching data for field \"%s\"",
+ _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
+ return ((tsize_t) 0);
+}
+
+/*
+ * Fetch an ASCII item from the file.
+ */
+static tsize_t
+TIFFFetchString(TIFF* tif, TIFFDirEntry* dir, char* cp)
+{
+ if (dir->tdir_count <= 4) {
+ uint32 l = dir->tdir_offset;
+ if (tif->tif_flags & TIFF_SWAB)
+ TIFFSwabLong(&l);
+ _TIFFmemcpy(cp, &l, dir->tdir_count);
+ return (1);
+ }
+ return (TIFFFetchData(tif, dir, cp));
+}
+
+/*
+ * Convert numerator+denominator to float.
+ */
+static int
+cvtRational(TIFF* tif, TIFFDirEntry* dir, uint32 num, uint32 denom, float* rv)
+{
+ if (denom == 0) {
+ TIFFError(tif->tif_name,
+ "%s: Rational with zero denominator (num = %lu)",
+ _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name, num);
+ return (0);
+ } else {
+ if (dir->tdir_type == TIFF_RATIONAL)
+ *rv = ((float)num / (float)denom);
+ else
+ *rv = ((float)(int32)num / (float)(int32)denom);
+ return (1);
+ }
+}
+
+/*
+ * Fetch a rational item from the file
+ * at offset off and return the value
+ * as a floating point number.
+ */
+static float
+TIFFFetchRational(TIFF* tif, TIFFDirEntry* dir)
+{
+ uint32 l[2];
+ float v;
+
+ return (!TIFFFetchData(tif, dir, (char *)l) ||
+ !cvtRational(tif, dir, l[0], l[1], &v) ? 1.0f : v);
+}
+
+/*
+ * Fetch a single floating point value
+ * from the offset field and return it
+ * as a native float.
+ */
+static float
+TIFFFetchFloat(TIFF* tif, TIFFDirEntry* dir)
+{
+ long l = TIFFExtractData(tif, dir->tdir_type, dir->tdir_offset);
+ float v = *(float*) &l;
+ TIFFCvtIEEEFloatToNative(tif, 1, &v);
+ return (v);
+}
+
+/*
+ * Fetch an array of BYTE or SBYTE values.
+ */
+static int
+TIFFFetchByteArray(TIFF* tif, TIFFDirEntry* dir, uint16* v)
+{
+ if (dir->tdir_count <= 4) {
+ /*
+ * Extract data from offset field.
+ */
+ if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) {
+ switch (dir->tdir_count) {
+ case 4: v[3] = dir->tdir_offset & 0xff;
+ case 3: v[2] = (dir->tdir_offset >> 8) & 0xff;
+ case 2: v[1] = (dir->tdir_offset >> 16) & 0xff;
+ case 1: v[0] = dir->tdir_offset >> 24;
+ }
+ } else {
+ switch (dir->tdir_count) {
+ case 4: v[3] = dir->tdir_offset >> 24;
+ case 3: v[2] = (dir->tdir_offset >> 16) & 0xff;
+ case 2: v[1] = (dir->tdir_offset >> 8) & 0xff;
+ case 1: v[0] = dir->tdir_offset & 0xff;
+ }
+ }
+ return (1);
+ } else
+ return (TIFFFetchData(tif, dir, (char*) v) != 0); /* XXX */
+}
+
+/*
+ * Fetch an array of SHORT or SSHORT values.
+ */
+static int
+TIFFFetchShortArray(TIFF* tif, TIFFDirEntry* dir, uint16* v)
+{
+ if (dir->tdir_count <= 2) {
+ if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) {
+ switch (dir->tdir_count) {
+ case 2: v[1] = dir->tdir_offset & 0xffff;
+ case 1: v[0] = dir->tdir_offset >> 16;
+ }
+ } else {
+ switch (dir->tdir_count) {
+ case 2: v[1] = dir->tdir_offset >> 16;
+ case 1: v[0] = dir->tdir_offset & 0xffff;
+ }
+ }
+ return (1);
+ } else
+ return (TIFFFetchData(tif, dir, (char *)v) != 0);
+}
+
+/*
+ * Fetch a pair of SHORT or BYTE values.
+ */
+static int
+TIFFFetchShortPair(TIFF* tif, TIFFDirEntry* dir)
+{
+ uint16 v[2];
+ int ok = 0;
+
+ switch (dir->tdir_type) {
+ case TIFF_SHORT:
+ case TIFF_SSHORT:
+ ok = TIFFFetchShortArray(tif, dir, v);
+ break;
+ case TIFF_BYTE:
+ case TIFF_SBYTE:
+ ok = TIFFFetchByteArray(tif, dir, v);
+ break;
+ }
+ if (ok)
+ TIFFSetField(tif, dir->tdir_tag, v[0], v[1]);
+ return (ok);
+}
+
+/*
+ * Fetch an array of LONG or SLONG values.
+ */
+static int
+TIFFFetchLongArray(TIFF* tif, TIFFDirEntry* dir, uint32* v)
+{
+ if (dir->tdir_count == 1) {
+ v[0] = dir->tdir_offset;
+ return (1);
+ } else
+ return (TIFFFetchData(tif, dir, (char*) v) != 0);
+}
+
+/*
+ * Fetch an array of RATIONAL or SRATIONAL values.
+ */
+static int
+TIFFFetchRationalArray(TIFF* tif, TIFFDirEntry* dir, float* v)
+{
+ int ok = 0;
+ uint32* l;
+
+ l = (uint32*)CheckMalloc(tif,
+ dir->tdir_count*tiffDataWidth[dir->tdir_type],
+ "to fetch array of rationals");
+ if (l) {
+ if (TIFFFetchData(tif, dir, (char *)l)) {
+ uint32 i;
+ for (i = 0; i < dir->tdir_count; i++) {
+ ok = cvtRational(tif, dir,
+ l[2*i+0], l[2*i+1], &v[i]);
+ if (!ok)
+ break;
+ }
+ }
+ _TIFFfree((char *)l);
+ }
+ return (ok);
+}
+
+/*
+ * Fetch an array of FLOAT values.
+ */
+static int
+TIFFFetchFloatArray(TIFF* tif, TIFFDirEntry* dir, float* v)
+{
+
+ if (dir->tdir_count == 1) {
+ v[0] = *(float*) &dir->tdir_offset;
+ TIFFCvtIEEEFloatToNative(tif, dir->tdir_count, v);
+ return (1);
+ } else if (TIFFFetchData(tif, dir, (char*) v)) {
+ TIFFCvtIEEEFloatToNative(tif, dir->tdir_count, v);
+ return (1);
+ } else
+ return (0);
+}
+
+/*
+ * Fetch an array of DOUBLE values.
+ */
+static int
+TIFFFetchDoubleArray(TIFF* tif, TIFFDirEntry* dir, double* v)
+{
+ if (TIFFFetchData(tif, dir, (char*) v)) {
+ TIFFCvtIEEEDoubleToNative(tif, dir->tdir_count, v);
+ return (1);
+ } else
+ return (0);
+}
+
+/*
+ * Fetch an array of ANY values. The actual values are
+ * returned as doubles which should be able hold all the
+ * types. Yes, there really should be an tany_t to avoid
+ * this potential non-portability ... Note in particular
+ * that we assume that the double return value vector is
+ * large enough to read in any fundamental type. We use
+ * that vector as a buffer to read in the base type vector
+ * and then convert it in place to double (from end
+ * to front of course).
+ */
+static int
+TIFFFetchAnyArray(TIFF* tif, TIFFDirEntry* dir, double* v)
+{
+ int i;
+
+ switch (dir->tdir_type) {
+ case TIFF_BYTE:
+ case TIFF_SBYTE:
+ if (!TIFFFetchByteArray(tif, dir, (uint16*) v))
+ return (0);
+ if (dir->tdir_type == TIFF_BYTE) {
+ uint16* vp = (uint16*) v;
+ for (i = dir->tdir_count-1; i >= 0; i--)
+ v[i] = vp[i];
+ } else {
+ int16* vp = (int16*) v;
+ for (i = dir->tdir_count-1; i >= 0; i--)
+ v[i] = vp[i];
+ }
+ break;
+ case TIFF_SHORT:
+ case TIFF_SSHORT:
+ if (!TIFFFetchShortArray(tif, dir, (uint16*) v))
+ return (0);
+ if (dir->tdir_type == TIFF_SHORT) {
+ uint16* vp = (uint16*) v;
+ for (i = dir->tdir_count-1; i >= 0; i--)
+ v[i] = vp[i];
+ } else {
+ int16* vp = (int16*) v;
+ for (i = dir->tdir_count-1; i >= 0; i--)
+ v[i] = vp[i];
+ }
+ break;
+ case TIFF_LONG:
+ case TIFF_SLONG:
+ if (!TIFFFetchLongArray(tif, dir, (uint32*) v))
+ return (0);
+ if (dir->tdir_type == TIFF_LONG) {
+ uint32* vp = (uint32*) v;
+ for (i = dir->tdir_count-1; i >= 0; i--)
+ v[i] = vp[i];
+ } else {
+ int32* vp = (int32*) v;
+ for (i = dir->tdir_count-1; i >= 0; i--)
+ v[i] = vp[i];
+ }
+ break;
+ case TIFF_RATIONAL:
+ case TIFF_SRATIONAL:
+ if (!TIFFFetchRationalArray(tif, dir, (float*) v))
+ return (0);
+ { float* vp = (float*) v;
+ for (i = dir->tdir_count-1; i >= 0; i--)
+ v[i] = vp[i];
+ }
+ break;
+ case TIFF_FLOAT:
+ if (!TIFFFetchFloatArray(tif, dir, (float*) v))
+ return (0);
+ { float* vp = (float*) v;
+ for (i = dir->tdir_count-1; i >= 0; i--)
+ v[i] = vp[i];
+ }
+ break;
+ case TIFF_DOUBLE:
+ return (TIFFFetchDoubleArray(tif, dir, (double*) v));
+ default:
+ /* TIFF_NOTYPE */
+ /* TIFF_ASCII */
+ /* TIFF_UNDEFINED */
+ TIFFError(tif->tif_name,
+ "Cannot read TIFF_ANY type %d for field \"%s\"",
+ _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
+ return (0);
+ }
+ return (1);
+}
+
+/*
+ * Fetch a tag that is not handled by special case code.
+ */
+static int
+TIFFFetchNormalTag(TIFF* tif, TIFFDirEntry* dp)
+{
+ static const char mesg[] = "to fetch tag value";
+ int ok = 0;
+ const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, dp->tdir_tag);
+
+ if (dp->tdir_count > 1) { /* array of values */
+ char* cp = NULL;
+
+ switch (dp->tdir_type) {
+ case TIFF_BYTE:
+ case TIFF_SBYTE:
+ /* NB: always expand BYTE values to shorts */
+ cp = CheckMalloc(tif,
+ dp->tdir_count * sizeof (uint16), mesg);
+ ok = cp && TIFFFetchByteArray(tif, dp, (uint16*) cp);
+ break;
+ case TIFF_SHORT:
+ case TIFF_SSHORT:
+ cp = CheckMalloc(tif,
+ dp->tdir_count * sizeof (uint16), mesg);
+ ok = cp && TIFFFetchShortArray(tif, dp, (uint16*) cp);
+ break;
+ case TIFF_LONG:
+ case TIFF_SLONG:
+ cp = CheckMalloc(tif,
+ dp->tdir_count * sizeof (uint32), mesg);
+ ok = cp && TIFFFetchLongArray(tif, dp, (uint32*) cp);
+ break;
+ case TIFF_RATIONAL:
+ case TIFF_SRATIONAL:
+ cp = CheckMalloc(tif,
+ dp->tdir_count * sizeof (float), mesg);
+ ok = cp && TIFFFetchRationalArray(tif, dp, (float*) cp);
+ break;
+ case TIFF_FLOAT:
+ cp = CheckMalloc(tif,
+ dp->tdir_count * sizeof (float), mesg);
+ ok = cp && TIFFFetchFloatArray(tif, dp, (float*) cp);
+ break;
+ case TIFF_DOUBLE:
+ cp = CheckMalloc(tif,
+ dp->tdir_count * sizeof (double), mesg);
+ ok = cp && TIFFFetchDoubleArray(tif, dp, (double*) cp);
+ break;
+ case TIFF_ASCII:
+ case TIFF_UNDEFINED: /* bit of a cheat... */
+ /*
+ * Some vendors write strings w/o the trailing
+ * NULL byte, so always append one just in case.
+ */
+ cp = CheckMalloc(tif, dp->tdir_count+1, mesg);
+ if( (ok = (cp && TIFFFetchString(tif, dp, cp))) != 0 )
+ cp[dp->tdir_count] = '\0'; /* XXX */
+ break;
+ }
+ if (ok) {
+ ok = (fip->field_passcount ?
+ TIFFSetField(tif, dp->tdir_tag, dp->tdir_count, cp)
+ : TIFFSetField(tif, dp->tdir_tag, cp));
+ }
+ if (cp != NULL)
+ _TIFFfree(cp);
+ } else if (CheckDirCount(tif, dp, 1)) { /* singleton value */
+ switch (dp->tdir_type) {
+ case TIFF_BYTE:
+ case TIFF_SBYTE:
+ case TIFF_SHORT:
+ case TIFF_SSHORT:
+ /*
+ * If the tag is also acceptable as a LONG or SLONG
+ * then TIFFSetField will expect an uint32 parameter
+ * passed to it (through varargs). Thus, for machines
+ * where sizeof (int) != sizeof (uint32) we must do
+ * a careful check here. It's hard to say if this
+ * is worth optimizing.
+ *
+ * NB: We use TIFFFieldWithTag here knowing that
+ * it returns us the first entry in the table
+ * for the tag and that that entry is for the
+ * widest potential data type the tag may have.
+ */
+ { TIFFDataType type = fip->field_type;
+ if (type != TIFF_LONG && type != TIFF_SLONG) {
+ uint16 v = (uint16)
+ TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset);
+ ok = (fip->field_passcount ?
+ TIFFSetField(tif, dp->tdir_tag, 1, &v)
+ : TIFFSetField(tif, dp->tdir_tag, v));
+ break;
+ }
+ }
+ /* fall thru... */
+ case TIFF_LONG:
+ case TIFF_SLONG:
+ { uint32 v32 =
+ TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset);
+ ok = (fip->field_passcount ?
+ TIFFSetField(tif, dp->tdir_tag, 1, &v32)
+ : TIFFSetField(tif, dp->tdir_tag, v32));
+ }
+ break;
+ case TIFF_RATIONAL:
+ case TIFF_SRATIONAL:
+ case TIFF_FLOAT:
+ { float v = (dp->tdir_type == TIFF_FLOAT ?
+ TIFFFetchFloat(tif, dp)
+ : TIFFFetchRational(tif, dp));
+ ok = (fip->field_passcount ?
+ TIFFSetField(tif, dp->tdir_tag, 1, &v)
+ : TIFFSetField(tif, dp->tdir_tag, v));
+ }
+ break;
+ case TIFF_DOUBLE:
+ { double v;
+ ok = (TIFFFetchDoubleArray(tif, dp, &v) &&
+ (fip->field_passcount ?
+ TIFFSetField(tif, dp->tdir_tag, 1, &v)
+ : TIFFSetField(tif, dp->tdir_tag, v))
+ );
+ }
+ break;
+ case TIFF_ASCII:
+ case TIFF_UNDEFINED: /* bit of a cheat... */
+ { char c[2];
+ if( (ok = (TIFFFetchString(tif, dp, c) != 0)) != 0 ){
+ c[1] = '\0'; /* XXX paranoid */
+ ok = TIFFSetField(tif, dp->tdir_tag, c);
+ }
+ }
+ break;
+ }
+ }
+ return (ok);
+}
+
+#define NITEMS(x) (sizeof (x) / sizeof (x[0]))
+/*
+ * Fetch samples/pixel short values for
+ * the specified tag and verify that
+ * all values are the same.
+ */
+static int
+TIFFFetchPerSampleShorts(TIFF* tif, TIFFDirEntry* dir, int* pl)
+{
+ int samples = tif->tif_dir.td_samplesperpixel;
+ int status = 0;
+
+ if (CheckDirCount(tif, dir, (uint32) samples)) {
+ uint16 buf[10];
+ uint16* v = buf;
+
+ if (samples > NITEMS(buf))
+ v = (uint16*) _TIFFmalloc(samples * sizeof (uint16));
+ if (TIFFFetchShortArray(tif, dir, v)) {
+ int i;
+ for (i = 1; i < samples; i++)
+ if (v[i] != v[0]) {
+ TIFFError(tif->tif_name,
+ "Cannot handle different per-sample values for field \"%s\"",
+ _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
+ goto bad;
+ }
+ *pl = v[0];
+ status = 1;
+ }
+ bad:
+ if (v != buf)
+ _TIFFfree((char*) v);
+ }
+ return (status);
+}
+
+/*
+ * Fetch samples/pixel ANY values for
+ * the specified tag and verify that
+ * all values are the same.
+ */
+static int
+TIFFFetchPerSampleAnys(TIFF* tif, TIFFDirEntry* dir, double* pl)
+{
+ int samples = (int) tif->tif_dir.td_samplesperpixel;
+ int status = 0;
+
+ if (CheckDirCount(tif, dir, (uint32) samples)) {
+ double buf[10];
+ double* v = buf;
+
+ if (samples > NITEMS(buf))
+ v = (double*) _TIFFmalloc(samples * sizeof (double));
+ if (TIFFFetchAnyArray(tif, dir, v)) {
+ int i;
+ for (i = 1; i < samples; i++)
+ if (v[i] != v[0]) {
+ TIFFError(tif->tif_name,
+ "Cannot handle different per-sample values for field \"%s\"",
+ _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
+ goto bad;
+ }
+ *pl = v[0];
+ status = 1;
+ }
+ bad:
+ if (v != buf)
+ _TIFFfree(v);
+ }
+ return (status);
+}
+#undef NITEMS
+
+/*
+ * Fetch a set of offsets or lengths.
+ * While this routine says "strips",
+ * in fact it's also used for tiles.
+ */
+static int
+TIFFFetchStripThing(TIFF* tif, TIFFDirEntry* dir, long nstrips, uint32** lpp)
+{
+ register uint32* lp;
+ int status;
+
+ if (!CheckDirCount(tif, dir, (uint32) nstrips))
+ return (0);
+ /*
+ * Allocate space for strip information.
+ */
+ if (*lpp == NULL &&
+ (*lpp = (uint32 *)CheckMalloc(tif,
+ nstrips * sizeof (uint32), "for strip array")) == NULL)
+ return (0);
+ lp = *lpp;
+ if (dir->tdir_type == (int)TIFF_SHORT) {
+ /*
+ * Handle uint16->uint32 expansion.
+ */
+ uint16* dp = (uint16*) CheckMalloc(tif,
+ dir->tdir_count* sizeof (uint16), "to fetch strip tag");
+ if (dp == NULL)
+ return (0);
+ if( (status = TIFFFetchShortArray(tif, dir, dp)) != 0 ) {
+ register uint16* wp = dp;
+ while (nstrips-- > 0)
+ *lp++ = *wp++;
+ }
+ _TIFFfree((char*) dp);
+ } else
+ status = TIFFFetchLongArray(tif, dir, lp);
+ return (status);
+}
+
+#define NITEMS(x) (sizeof (x) / sizeof (x[0]))
+/*
+ * Fetch and set the ExtraSamples tag.
+ */
+static int
+TIFFFetchExtraSamples(TIFF* tif, TIFFDirEntry* dir)
+{
+ uint16 buf[10];
+ uint16* v = buf;
+ int status;
+
+ if (dir->tdir_count > NITEMS(buf))
+ v = (uint16*) _TIFFmalloc(dir->tdir_count * sizeof (uint16));
+ if (dir->tdir_type == TIFF_BYTE)
+ status = TIFFFetchByteArray(tif, dir, v);
+ else
+ status = TIFFFetchShortArray(tif, dir, v);
+ if (status)
+ status = TIFFSetField(tif, dir->tdir_tag, dir->tdir_count, v);
+ if (v != buf)
+ _TIFFfree((char*) v);
+ return (status);
+}
+#undef NITEMS
+
+#ifdef COLORIMETRY_SUPPORT
+/*
+ * Fetch and set the RefBlackWhite tag.
+ */
+static int
+TIFFFetchRefBlackWhite(TIFF* tif, TIFFDirEntry* dir)
+{
+ static const char mesg[] = "for \"ReferenceBlackWhite\" array";
+ char* cp;
+ int ok;
+
+ if (dir->tdir_type == TIFF_RATIONAL)
+ return (TIFFFetchNormalTag(tif, dir));
+ /*
+ * Handle LONG's for backward compatibility.
+ */
+ cp = CheckMalloc(tif, dir->tdir_count * sizeof (uint32), mesg);
+ if( (ok = (cp && TIFFFetchLongArray(tif, dir, (uint32*) cp))) != 0) {
+ float* fp = (float*)
+ CheckMalloc(tif, dir->tdir_count * sizeof (float), mesg);
+ if( (ok = (fp != NULL)) != 0 ) {
+ uint32 i;
+ for (i = 0; i < dir->tdir_count; i++)
+ fp[i] = (float)((uint32*) cp)[i];
+ ok = TIFFSetField(tif, dir->tdir_tag, fp);
+ _TIFFfree((char*) fp);
+ }
+ }
+ if (cp)
+ _TIFFfree(cp);
+ return (ok);
+}
+#endif
+
+/*
+ * Replace a single strip (tile) of uncompressed data by
+ * multiple strips (tiles), each approximately 8Kbytes.
+ * This is useful for dealing with large images or
+ * for dealing with machines with a limited amount
+ * memory.
+ */
+static void
+ChopUpSingleUncompressedStrip(TIFF* tif)
+{
+ register TIFFDirectory *td = &tif->tif_dir;
+ uint32 bytecount = td->td_stripbytecount[0];
+ uint32 offset = td->td_stripoffset[0];
+ tsize_t rowbytes = TIFFVTileSize(tif, 1), stripbytes;
+ tstrip_t strip, nstrips, rowsperstrip;
+ uint32* newcounts;
+ uint32* newoffsets;
+
+ /*
+ * Make the rows hold at least one
+ * scanline, but fill 8k if possible.
+ */
+ if (rowbytes > 8192) {
+ stripbytes = rowbytes;
+ rowsperstrip = 1;
+ } else {
+ rowsperstrip = 8192 / rowbytes;
+ stripbytes = rowbytes * rowsperstrip;
+ }
+ /* never increase the number of strips in an image */
+ if (rowsperstrip >= td->td_rowsperstrip)
+ return;
+ nstrips = (tstrip_t) TIFFhowmany(bytecount, stripbytes);
+ newcounts = (uint32*) CheckMalloc(tif, nstrips * sizeof (uint32),
+ "for chopped \"StripByteCounts\" array");
+ newoffsets = (uint32*) CheckMalloc(tif, nstrips * sizeof (uint32),
+ "for chopped \"StripOffsets\" array");
+ if (newcounts == NULL || newoffsets == NULL) {
+ /*
+ * Unable to allocate new strip information, give
+ * up and use the original one strip information.
+ */
+ if (newcounts != NULL)
+ _TIFFfree(newcounts);
+ if (newoffsets != NULL)
+ _TIFFfree(newoffsets);
+ return;
+ }
+ /*
+ * Fill the strip information arrays with
+ * new bytecounts and offsets that reflect
+ * the broken-up format.
+ */
+ for (strip = 0; strip < nstrips; strip++) {
+ if (stripbytes > bytecount)
+ stripbytes = bytecount;
+ newcounts[strip] = stripbytes;
+ newoffsets[strip] = offset;
+ offset += stripbytes;
+ bytecount -= stripbytes;
+ }
+ /*
+ * Replace old single strip info with multi-strip info.
+ */
+ td->td_stripsperimage = td->td_nstrips = nstrips;
+ TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip);
+
+ _TIFFfree(td->td_stripbytecount);
+ _TIFFfree(td->td_stripoffset);
+ td->td_stripbytecount = newcounts;
+ td->td_stripoffset = newoffsets;
+}
projects / wxWidgets.git / blobdiff