diff options
Diffstat (limited to 'tiff/contrib/pds/tif_pdsdirread.c')
| -rwxr-xr-x | tiff/contrib/pds/tif_pdsdirread.c | 1131 |
1 files changed, 1131 insertions, 0 deletions
diff --git a/tiff/contrib/pds/tif_pdsdirread.c b/tiff/contrib/pds/tif_pdsdirread.c new file mode 100755 index 0000000..37e513a --- /dev/null +++ b/tiff/contrib/pds/tif_pdsdirread.c @@ -0,0 +1,1131 @@ +/* $Header: /cvs/maptools/cvsroot/libtiff/contrib/pds/tif_pdsdirread.c,v 1.4 2010-06-08 18:55:15 bfriesen Exp $ */ + +/* + * Copyright (c) 1988-1996 Sam Leffler + * Copyright (c) 1991-1996 Silicon Graphics, Inc. + * Copyright (c( 1996 USAF Phillips Laboratory + * + * Permission to use, copy, modify, distribute, and sell this software and + * its documentation for any purpose is hereby granted without fee, provided + * that (i) the above copyright notices and this permission notice appear in + * all copies of the software and related documentation, and (ii) the names of + * Sam Leffler and Silicon Graphics may not be used in any advertising or + * publicity relating to the software without the specific, prior written + * permission of Sam Leffler and Silicon Graphics. + * + * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, + * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * + * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR + * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, + * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, + * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF + * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +/* + * TIFF Library. + * + * These routines written by Conrad J. Poelman on a single late-night of + * March 20-21, 1996. + * + * The entire purpose of this file is to provide a single external function, + * TIFFReadPrivateDataSubDirectory(). This function is intended for use in reading a + * private subdirectory from a TIFF file into a private structure. The + * actual writing of data into the structure is handled by the setFieldFn(), + * which is passed to TIFFReadPrivateDataSubDirectory() as a parameter. The idea is to + * enable any application wishing to store private subdirectories to do so + * easily using this function, without modifying the TIFF library. + * + * The astute observer will notice that only two functions are at all different + * from the original tif_dirread.c file: TIFFReadPrivateDataSubDirectory() and + * TIFFFetchNormalSubTag(). All the other stuff that makes this file so huge + * is only necessary because all of those functions are declared static in + * tif_dirread.c, so we have to totally duplicate them in order to use them. + * + * Oh, also note the bug fix in TIFFFetchFloat(). + * + */ + +#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 TIFFFetchNormalSubTag(TIFF*, TIFFDirEntry*, const TIFFFieldInfo*, + int (*getFieldFn)(TIFF *tif,ttag_t tag,...)); +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*); +#if STRIPCHOP_SUPPORT +static void ChopUpSingleUncompressedStrip(TIFF*); +#endif + +static char * +CheckMalloc(TIFF* tif, tsize_t n, const char* what) +{ + char *cp = (char*)_TIFFmalloc(n); + if (cp == NULL) + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space %s", what); + return (cp); +} + +/* Just as was done with TIFFWritePrivateDataSubDirectory(), here we implement + TIFFReadPrivateDataSubDirectory() which takes an offset into the TIFF file, + a TIFFFieldInfo structure specifying the types of the various tags, + and a function to use to set individual tags when they are encountered. + The data is read from the file, translated using the TIFF library's + built-in machine-independent conversion functions, and filled into + private subdirectory structure. + + This code was written by copying the original TIFFReadDirectory() function + from tif_dirread.c and paring it down to what is needed for this. + + It is the caller's responsibility to allocate and initialize the internal + structure that setFieldFn() will be writing into. If this function is being + called more than once before closing the file, the caller also must be + careful to free data in the structure before re-initializing. + + It is also the caller's responsibility to verify the presence of + any required fields after reading the directory in. +*/ + + +int +TIFFReadPrivateDataSubDirectory(TIFF* tif, toff_t pdir_offset, + TIFFFieldInfo *field_info, + int (*setFieldFn)(TIFF *tif, ttag_t tag, ...)) +{ + 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; + + /* Skipped part about checking for directories or compression data. */ + + if (!isMapped(tif)) { + if (!SeekOK(tif, pdir_offset)) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Seek error accessing TIFF private subdirectory"); + return (0); + } + if (!ReadOK(tif, &dircount, sizeof (uint16))) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Can not read TIFF private subdirectory count"); + return (0); + } + if (tif->tif_flags & TIFF_SWAB) + TIFFSwabShort(&dircount); + dir = (TIFFDirEntry *)CheckMalloc(tif, + dircount * sizeof (TIFFDirEntry), "to read TIFF private subdirectory"); + if (dir == NULL) + return (0); + if (!ReadOK(tif, dir, dircount*sizeof (TIFFDirEntry))) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Can not read TIFF private subdirectory"); + goto bad; + } + /* + * Read offset to next directory for sequential scans. + */ + (void) ReadOK(tif, &nextdiroff, sizeof (uint32)); + } else { + toff_t off = pdir_offset; + + if (off + sizeof (short) > tif->tif_size) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Can not read TIFF private subdirectory 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 private subdirectory"); + if (dir == NULL) + return (0); + if (off + dircount*sizeof (TIFFDirEntry) > tif->tif_size) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Can not read TIFF private subdirectory"); + 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); + + /* + * 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; + + for (fip = field_info, dp = dir, n = dircount; + n > 0; n--, dp++) { + if (tif->tif_flags & TIFF_SWAB) { + TIFFSwabArrayOfShort(&dp->tdir_tag, 2); + TIFFSwabArrayOfLong(&dp->tdir_count, 2); + } + /* + * Find the field information entry for this tag. + */ + /* + * 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 < fip->field_tag) { + if (!diroutoforderwarning) { + TIFFWarning(tif->tif_name, + "invalid TIFF private subdirectory; tags are not sorted in ascending order"); + diroutoforderwarning = 1; + } + fip = field_info; /* O(n^2) */ + } + + while (fip->field_tag && fip->field_tag < dp->tdir_tag) + fip++; + if (!fip->field_tag || fip->field_tag != dp->tdir_tag) { + TIFFWarning(tif->tif_name, + "unknown field with tag %d (0x%x) in private subdirectory ignored", + dp->tdir_tag, dp->tdir_tag); + dp->tdir_tag = IGNORE; + fip = field_info;/* restart search */ + continue; + } + /* + * Null out old tags that we ignore. + */ + + /* Not implemented yet, since FIELD_IGNORE is specific to + the main directories. Could pass this in too... */ + if (0 /* && fip->field_bit == FIELD_IGNORE */) { + ignore: + dp->tdir_tag = IGNORE; + continue; + } + + /* + * Check data type. + */ + + while (dp->tdir_type != (u_short)fip->field_type) { + if (fip->field_type == TIFF_ANY) /* wildcard */ + break; + fip++; + if (!fip->field_tag || 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; + } + + /* Now read in and process data from field. */ + if (!TIFFFetchNormalSubTag(tif, dp, fip, setFieldFn)) + goto bad; + + } + + if (dir) + _TIFFfree(dir); + 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) / 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_nstrips; + 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) +{ + TIFFErrorExt(tif->tif_clientdata, 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: + TIFFErrorExt(tif->tif_clientdata, 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) { + TIFFErrorExt(tif->tif_clientdata, 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) +{ + /* This appears to be a flagrant bug in the TIFF library, yet I + actually don't understand how it could have ever worked the old + way. Look at the comments in my new code and you'll understand. */ +#if (0) + float v = (float) + TIFFExtractData(tif, dir->tdir_type, dir->tdir_offset); + TIFFCvtIEEEFloatToNative(tif, 1, &v); +#else + float v; + /* This is a little bit tricky - if we just cast the uint32 to a float, + C will perform a numerical conversion, which is not what we want. + We want to take the actual bit pattern in the uint32 and interpret + it as a float. Thus we cast a uint32 * into a float * and then + dereference to get v. */ + uint32 l = (uint32) + TIFFExtractData(tif, dir->tdir_type, dir->tdir_offset); + v = * (float *) &l; + TIFFCvtIEEEFloatToNative(tif, 1, &v); +#endif + 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 */ + TIFFErrorExt(tif->tif_clientdata, 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. + */ +/* The standard function TIFFFetchNormalTag() could definitely be replaced + with a simple call to this function, just adding TIFFSetField() as the + last argument. */ +static int +TIFFFetchNormalSubTag(TIFF* tif, TIFFDirEntry* dp, const TIFFFieldInfo* fip, + int (*setFieldFn)(TIFF *tif, ttag_t tag, ...)) +{ + static char mesg[] = "to fetch tag value"; + int ok = 0; + + 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))) + cp[dp->tdir_count] = '\0'; /* XXX */ + break; + } + if (ok) { + ok = (fip->field_passcount ? + (*setFieldFn)(tif, dp->tdir_tag, dp->tdir_count, cp) + : (*setFieldFn)(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 (*setFieldFn) 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 ? + (*setFieldFn)(tif, dp->tdir_tag, 1, &v) + : (*setFieldFn)(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 ? + (*setFieldFn)(tif, dp->tdir_tag, 1, &v32) + : (*setFieldFn)(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 ? + (*setFieldFn)(tif, dp->tdir_tag, 1, &v) + : (*setFieldFn)(tif, dp->tdir_tag, v)); + } + break; + case TIFF_DOUBLE: + { double v; + ok = (TIFFFetchDoubleArray(tif, dp, &v) && + (fip->field_passcount ? + (*setFieldFn)(tif, dp->tdir_tag, 1, &v) + : (*setFieldFn)(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)) { + c[1] = '\0'; /* XXX paranoid */ + ok = (*setFieldFn)(tif, dp->tdir_tag, c); + } + } + break; + } + } + return (ok); +} + +/* Everything after this is exactly duplicated from the standard tif_dirread.c + file, necessitated by the fact that they are declared static there so + we can't call them! +*/ +#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]) { + TIFFErrorExt(tif->tif_clientdata, 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]) { + TIFFErrorExt(tif->tif_clientdata, 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)) { + 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 char mesg[] = "for \"ReferenceBlackWhite\" array"; + char* cp; + int ok; + + if (dir->tdir_type == TIFF_RATIONAL) + return (1/*TIFFFetchNormalTag(tif, dir) just so linker won't complain - this part of the code is never used anyway */); + /* + * Handle LONG's for backward compatibility. + */ + cp = CheckMalloc(tif, dir->tdir_count * sizeof (uint32), mesg); + if (ok = (cp && TIFFFetchLongArray(tif, dir, (uint32*) cp))) { + float* fp = (float*) + CheckMalloc(tif, dir->tdir_count * sizeof (float), mesg); + if (ok = (fp != NULL)) { + 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 + +#if STRIPCHOP_SUPPORT +/* + * 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; +} +#endif /* STRIPCHOP_SUPPORT */ +/* + * Local Variables: + * mode: c + * c-basic-offset: 8 + * fill-column: 78 + * End: + */ |