diff options
Diffstat (limited to 'tiff/contrib/pds/tif_pdsdirread.c')
| -rwxr-xr-x | tiff/contrib/pds/tif_pdsdirread.c | 1131 |
1 files changed, 0 insertions, 1131 deletions
diff --git a/tiff/contrib/pds/tif_pdsdirread.c b/tiff/contrib/pds/tif_pdsdirread.c deleted file mode 100755 index 37e513a..0000000 --- a/tiff/contrib/pds/tif_pdsdirread.c +++ /dev/null @@ -1,1131 +0,0 @@ -/* $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: - */ |