419 lines
11 KiB
C
419 lines
11 KiB
C
/*
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* Copyright (c) 1991-1997 Sam Leffler
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* Copyright (c) 1991-1997 Silicon Graphics, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that (i) the above copyright notices and this permission notice appear in
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* all copies of the software and related documentation, and (ii) the names of
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* Sam Leffler and Silicon Graphics may not be used in any advertising or
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* publicity relating to the software without the specific, prior written
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* permission of Sam Leffler and Silicon Graphics.
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*
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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/*
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* TIFF Library.
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*
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* Auxiliary Support Routines.
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*/
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#include "tiffiop.h"
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#include "tif_predict.h"
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#include <math.h>
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#include <float.h>
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uint32
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_TIFFMultiply32(TIFF* tif, uint32 first, uint32 second, const char* where)
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{
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if (second && first > TIFF_UINT32_MAX / second) {
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TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
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return 0;
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}
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return first * second;
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}
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uint64
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_TIFFMultiply64(TIFF* tif, uint64 first, uint64 second, const char* where)
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{
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if (second && first > TIFF_UINT64_MAX / second) {
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TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
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return 0;
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}
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return first * second;
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}
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tmsize_t
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_TIFFMultiplySSize(TIFF* tif, tmsize_t first, tmsize_t second, const char* where)
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{
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if( first <= 0 || second <= 0 )
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{
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if( tif != NULL && where != NULL )
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{
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TIFFErrorExt(tif->tif_clientdata, where,
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"Invalid argument to _TIFFMultiplySSize() in %s", where);
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}
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return 0;
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}
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if( first > TIFF_TMSIZE_T_MAX / second )
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{
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if( tif != NULL && where != NULL )
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{
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TIFFErrorExt(tif->tif_clientdata, where,
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"Integer overflow in %s", where);
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}
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return 0;
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}
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return first * second;
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}
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tmsize_t _TIFFCastUInt64ToSSize(TIFF* tif, uint64 val, const char* module)
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{
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if( val > (uint64)TIFF_TMSIZE_T_MAX )
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{
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if( tif != NULL && module != NULL )
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{
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TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
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}
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return 0;
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}
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return (tmsize_t)val;
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}
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void*
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_TIFFCheckRealloc(TIFF* tif, void* buffer,
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tmsize_t nmemb, tmsize_t elem_size, const char* what)
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{
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void* cp = NULL;
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tmsize_t count = _TIFFMultiplySSize(tif, nmemb, elem_size, NULL);
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/*
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* Check for integer overflow.
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*/
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if (count != 0)
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{
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cp = _TIFFrealloc(buffer, count);
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}
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if (cp == NULL) {
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
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"Failed to allocate memory for %s "
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"(%ld elements of %ld bytes each)",
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what,(long) nmemb, (long) elem_size);
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}
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return cp;
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}
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void*
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_TIFFCheckMalloc(TIFF* tif, tmsize_t nmemb, tmsize_t elem_size, const char* what)
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{
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return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what);
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}
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static int
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TIFFDefaultTransferFunction(TIFFDirectory* td)
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{
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uint16 **tf = td->td_transferfunction;
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tmsize_t i, n, nbytes;
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tf[0] = tf[1] = tf[2] = 0;
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if (td->td_bitspersample >= sizeof(tmsize_t) * 8 - 2)
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return 0;
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n = ((tmsize_t)1)<<td->td_bitspersample;
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nbytes = n * sizeof (uint16);
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tf[0] = (uint16 *)_TIFFmalloc(nbytes);
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if (tf[0] == NULL)
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return 0;
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tf[0][0] = 0;
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for (i = 1; i < n; i++) {
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double t = (double)i/((double) n-1.);
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tf[0][i] = (uint16)floor(65535.*pow(t, 2.2) + .5);
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}
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if (td->td_samplesperpixel - td->td_extrasamples > 1) {
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tf[1] = (uint16 *)_TIFFmalloc(nbytes);
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if(tf[1] == NULL)
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goto bad;
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_TIFFmemcpy(tf[1], tf[0], nbytes);
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tf[2] = (uint16 *)_TIFFmalloc(nbytes);
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if (tf[2] == NULL)
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goto bad;
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_TIFFmemcpy(tf[2], tf[0], nbytes);
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}
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return 1;
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bad:
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if (tf[0])
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_TIFFfree(tf[0]);
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if (tf[1])
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_TIFFfree(tf[1]);
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if (tf[2])
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_TIFFfree(tf[2]);
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tf[0] = tf[1] = tf[2] = 0;
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return 0;
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}
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static int
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TIFFDefaultRefBlackWhite(TIFFDirectory* td)
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{
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int i;
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td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float));
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if (td->td_refblackwhite == NULL)
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return 0;
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if (td->td_photometric == PHOTOMETRIC_YCBCR) {
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/*
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* YCbCr (Class Y) images must have the ReferenceBlackWhite
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* tag set. Fix the broken images, which lacks that tag.
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*/
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td->td_refblackwhite[0] = 0.0F;
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td->td_refblackwhite[1] = td->td_refblackwhite[3] =
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td->td_refblackwhite[5] = 255.0F;
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td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
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} else {
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/*
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* Assume RGB (Class R)
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*/
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for (i = 0; i < 3; i++) {
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td->td_refblackwhite[2*i+0] = 0;
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td->td_refblackwhite[2*i+1] =
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(float)((1L<<td->td_bitspersample)-1L);
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}
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}
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return 1;
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}
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/*
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* Like TIFFGetField, but return any default
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* value if the tag is not present in the directory.
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*
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* NB: We use the value in the directory, rather than
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* explicit values so that defaults exist only one
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* place in the library -- in TIFFDefaultDirectory.
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*/
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int
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TIFFVGetFieldDefaulted(TIFF* tif, uint32 tag, va_list ap)
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{
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TIFFDirectory *td = &tif->tif_dir;
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if (TIFFVGetField(tif, tag, ap))
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return (1);
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switch (tag) {
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case TIFFTAG_SUBFILETYPE:
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*va_arg(ap, uint32 *) = td->td_subfiletype;
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return (1);
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case TIFFTAG_BITSPERSAMPLE:
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*va_arg(ap, uint16 *) = td->td_bitspersample;
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return (1);
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case TIFFTAG_THRESHHOLDING:
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*va_arg(ap, uint16 *) = td->td_threshholding;
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return (1);
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case TIFFTAG_FILLORDER:
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*va_arg(ap, uint16 *) = td->td_fillorder;
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return (1);
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case TIFFTAG_ORIENTATION:
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*va_arg(ap, uint16 *) = td->td_orientation;
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return (1);
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case TIFFTAG_SAMPLESPERPIXEL:
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*va_arg(ap, uint16 *) = td->td_samplesperpixel;
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return (1);
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case TIFFTAG_ROWSPERSTRIP:
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*va_arg(ap, uint32 *) = td->td_rowsperstrip;
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return (1);
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case TIFFTAG_MINSAMPLEVALUE:
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*va_arg(ap, uint16 *) = td->td_minsamplevalue;
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return (1);
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case TIFFTAG_MAXSAMPLEVALUE:
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*va_arg(ap, uint16 *) = td->td_maxsamplevalue;
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return (1);
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case TIFFTAG_PLANARCONFIG:
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*va_arg(ap, uint16 *) = td->td_planarconfig;
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return (1);
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case TIFFTAG_RESOLUTIONUNIT:
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*va_arg(ap, uint16 *) = td->td_resolutionunit;
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return (1);
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case TIFFTAG_PREDICTOR:
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{
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TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
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if( sp == NULL )
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{
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
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"Cannot get \"Predictor\" tag as plugin is not configured");
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*va_arg(ap, uint16*) = 0;
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return 0;
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}
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*va_arg(ap, uint16*) = (uint16) sp->predictor;
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return 1;
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}
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case TIFFTAG_DOTRANGE:
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*va_arg(ap, uint16 *) = 0;
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*va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
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return (1);
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case TIFFTAG_INKSET:
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*va_arg(ap, uint16 *) = INKSET_CMYK;
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return 1;
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case TIFFTAG_NUMBEROFINKS:
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*va_arg(ap, uint16 *) = 4;
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return (1);
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case TIFFTAG_EXTRASAMPLES:
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*va_arg(ap, uint16 *) = td->td_extrasamples;
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*va_arg(ap, const uint16 **) = td->td_sampleinfo;
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return (1);
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case TIFFTAG_MATTEING:
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*va_arg(ap, uint16 *) =
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(td->td_extrasamples == 1 &&
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td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
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return (1);
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case TIFFTAG_TILEDEPTH:
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*va_arg(ap, uint32 *) = td->td_tiledepth;
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return (1);
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case TIFFTAG_DATATYPE:
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*va_arg(ap, uint16 *) = td->td_sampleformat-1;
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return (1);
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case TIFFTAG_SAMPLEFORMAT:
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*va_arg(ap, uint16 *) = td->td_sampleformat;
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return(1);
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case TIFFTAG_IMAGEDEPTH:
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*va_arg(ap, uint32 *) = td->td_imagedepth;
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return (1);
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case TIFFTAG_YCBCRCOEFFICIENTS:
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{
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/* defaults are from CCIR Recommendation 601-1 */
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static const float ycbcrcoeffs[] = { 0.299f, 0.587f, 0.114f };
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*va_arg(ap, const float **) = ycbcrcoeffs;
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return 1;
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}
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case TIFFTAG_YCBCRSUBSAMPLING:
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*va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
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*va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
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return (1);
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case TIFFTAG_YCBCRPOSITIONING:
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*va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
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return (1);
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case TIFFTAG_WHITEPOINT:
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{
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/* TIFF 6.0 specification tells that it is no default
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value for the WhitePoint, but AdobePhotoshop TIFF
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Technical Note tells that it should be CIE D50. */
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static const float whitepoint[] = {
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D50_X0 / (D50_X0 + D50_Y0 + D50_Z0),
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D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0)
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};
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*va_arg(ap, const float **) = whitepoint;
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return 1;
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}
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case TIFFTAG_TRANSFERFUNCTION:
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if (!td->td_transferfunction[0] &&
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!TIFFDefaultTransferFunction(td)) {
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space for \"TransferFunction\" tag");
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return (0);
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}
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*va_arg(ap, const uint16 **) = td->td_transferfunction[0];
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if (td->td_samplesperpixel - td->td_extrasamples > 1) {
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*va_arg(ap, const uint16 **) = td->td_transferfunction[1];
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*va_arg(ap, const uint16 **) = td->td_transferfunction[2];
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}
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return (1);
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case TIFFTAG_REFERENCEBLACKWHITE:
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if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
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return (0);
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*va_arg(ap, const float **) = td->td_refblackwhite;
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return (1);
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}
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return 0;
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}
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/*
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* Like TIFFGetField, but return any default
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* value if the tag is not present in the directory.
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*/
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int
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TIFFGetFieldDefaulted(TIFF* tif, uint32 tag, ...)
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{
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int ok;
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va_list ap;
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va_start(ap, tag);
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ok = TIFFVGetFieldDefaulted(tif, tag, ap);
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va_end(ap);
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return (ok);
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}
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struct _Int64Parts {
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int32 low, high;
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};
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typedef union {
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struct _Int64Parts part;
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int64 value;
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} _Int64;
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float
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_TIFFUInt64ToFloat(uint64 ui64)
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{
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_Int64 i;
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i.value = ui64;
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if (i.part.high >= 0) {
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return (float)i.value;
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} else {
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long double df;
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df = (long double)i.value;
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df += 18446744073709551616.0; /* adding 2**64 */
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return (float)df;
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}
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}
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double
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_TIFFUInt64ToDouble(uint64 ui64)
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{
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_Int64 i;
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i.value = ui64;
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if (i.part.high >= 0) {
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return (double)i.value;
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} else {
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long double df;
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df = (long double)i.value;
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df += 18446744073709551616.0; /* adding 2**64 */
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return (double)df;
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}
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}
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float _TIFFClampDoubleToFloat( double val )
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{
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if( val > FLT_MAX )
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return FLT_MAX;
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if( val < -FLT_MAX )
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return -FLT_MAX;
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return (float)val;
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}
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int _TIFFSeekOK(TIFF* tif, toff_t off)
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{
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/* Huge offsets, especially -1 / UINT64_MAX, can cause issues */
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/* See http://bugzilla.maptools.org/show_bug.cgi?id=2726 */
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return off <= (~(uint64)0)/2 && TIFFSeekFile(tif,off,SEEK_SET)==off;
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}
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/* vim: set ts=8 sts=8 sw=8 noet: */
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/*
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* Local Variables:
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* mode: c
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* c-basic-offset: 8
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* fill-column: 78
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* End:
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*/
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