/* $Id: tif_aux.c,v 1.31 2017-11-17 20:21:00 erouault Exp $ */
/*
* Copyright (c) 1991-1997 Sam Leffler
* Copyright (c) 1991-1997 Silicon Graphics, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that (i) the above copyright notices and this permission notice appear in
* all copies of the software and related documentation, and (ii) the names of
* Sam Leffler and Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Sam Leffler and Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
/*
* TIFF Library.
*
* Auxiliary Support Routines.
*/
#include "tiffiop.h"
#include "tif_predict.h"
#include <math.h>
uint32
_TIFFMultiply32(TIFF* tif, uint32 first, uint32 second, const char* where)
{
uint32 bytes = first * second;
if (second && bytes / second != first) {
TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
bytes = 0;
}
return bytes;
}
uint64
_TIFFMultiply64(TIFF* tif, uint64 first, uint64 second, const char* where)
{
uint64 bytes = first * second;
if (second && bytes / second != first) {
TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
bytes = 0;
}
return bytes;
}
void*
_TIFFCheckRealloc(TIFF* tif, void* buffer,
tmsize_t nmemb, tmsize_t elem_size, const char* what)
{
void* cp = NULL;
tmsize_t bytes = nmemb * elem_size;
/*
* XXX: Check for integer overflow.
*/
if (nmemb && elem_size && bytes / elem_size == nmemb)
cp = _TIFFrealloc(buffer, bytes);
if (cp == NULL) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Failed to allocate memory for %s "
"(%ld elements of %ld bytes each)",
what,(long) nmemb, (long) elem_size);
}
return cp;
}
void*
_TIFFCheckMalloc(TIFF* tif, tmsize_t nmemb, tmsize_t elem_size, const char* what)
{
return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what);
}
static int
TIFFDefaultTransferFunction(TIFFDirectory* td)
{
uint16 **tf = td->td_transferfunction;
tmsize_t i, n, nbytes;
tf[0] = tf[1] = tf[2] = 0;
if (td->td_bitspersample >= sizeof(tmsize_t) * 8 - 2)
return 0;
n = ((tmsize_t)1)<<td->td_bitspersample;
nbytes = n * sizeof (uint16);
tf[0] = (uint16 *)_TIFFmalloc(nbytes);
if (tf[0] == NULL)
return 0;
tf[0][0] = 0;
for (i = 1; i < n; i++) {
double t = (double)i/((double) n-1.);
tf[0][i] = (uint16)floor(65535.*pow(t, 2.2) + .5);
}
if (td->td_samplesperpixel - td->td_extrasamples > 1) {
tf[1] = (uint16 *)_TIFFmalloc(nbytes);
if(tf[1] == NULL)
goto bad;
_TIFFmemcpy(tf[1], tf[0], nbytes);
tf[2] = (uint16 *)_TIFFmalloc(nbytes);
if (tf[2] == NULL)
goto bad;
_TIFFmemcpy(tf[2], tf[0], nbytes);
}
return 1;
bad:
if (tf[0])
_TIFFfree(tf[0]);
if (tf[1])
_TIFFfree(tf[1]);
if (tf[2])
_TIFFfree(tf[2]);
tf[0] = tf[1] = tf[2] = 0;
return 0;
}
static int
TIFFDefaultRefBlackWhite(TIFFDirectory* td)
{
int i;
td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float));
if (td->td_refblackwhite == NULL)
return 0;
if (td->td_photometric == PHOTOMETRIC_YCBCR) {
/*
* YCbCr (Class Y) images must have the ReferenceBlackWhite
* tag set. Fix the broken images, which lacks that tag.
*/
td->td_refblackwhite[0] = 0.0F;
td->td_refblackwhite[1] = td->td_refblackwhite[3] =
td->td_refblackwhite[5] = 255.0F;
td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
} else {
/*
* Assume RGB (Class R)
*/
for (i = 0; i < 3; i++) {
td->td_refblackwhite[2*i+0] = 0;
td->td_refblackwhite[2*i+1] =
(float)((1L<<td->td_bitspersample)-1L);
}
}
return 1;
}
/*
* Like TIFFGetField, but return any default
* value if the tag is not present in the directory.
*
* NB: We use the value in the directory, rather than
* explicit values so that defaults exist only one
* place in the library -- in TIFFDefaultDirectory.
*/
int
TIFFVGetFieldDefaulted(TIFF* tif, uint32 tag, va_list ap)
{
TIFFDirectory *td = &tif->tif_dir;
if (TIFFVGetField(tif, tag, ap))
return (1);
switch (tag) {
case TIFFTAG_SUBFILETYPE:
*va_arg(ap, uint32 *) = td->td_subfiletype;
return (1);
case TIFFTAG_BITSPERSAMPLE:
*va_arg(ap, uint16 *) = td->td_bitspersample;
return (1);
case TIFFTAG_THRESHHOLDING:
*va_arg(ap, uint16 *) = td->td_threshholding;
return (1);
case TIFFTAG_FILLORDER:
*va_arg(ap, uint16 *) = td->td_fillorder;
return (1);
case TIFFTAG_ORIENTATION:
*va_arg(ap, uint16 *) = td->td_orientation;
return (1);
case TIFFTAG_SAMPLESPERPIXEL:
*va_arg(ap, uint16 *) = td->td_samplesperpixel;
return (1);
case TIFFTAG_ROWSPERSTRIP:
*va_arg(ap, uint32 *) = td->td_rowsperstrip;
return (1);
case TIFFTAG_MINSAMPLEVALUE:
*va_arg(ap, uint16 *) = td->td_minsamplevalue;
return (1);
case TIFFTAG_MAXSAMPLEVALUE:
*va_arg(ap, uint16 *) = td->td_maxsamplevalue;
return (1);
case TIFFTAG_PLANARCONFIG:
*va_arg(ap, uint16 *) = td->td_planarconfig;
return (1);
case TIFFTAG_RESOLUTIONUNIT:
*va_arg(ap, uint16 *) = td->td_resolutionunit;
return (1);
case TIFFTAG_PREDICTOR:
{
TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
if( sp == NULL )
{
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Cannot get \"Predictor\" tag as plugin is not configured");
*va_arg(ap, uint16*) = 0;
return 0;
}
*va_arg(ap, uint16*) = (uint16) sp->predictor;
return 1;
}
case TIFFTAG_DOTRANGE:
*va_arg(ap, uint16 *) = 0;
*va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
return (1);
case TIFFTAG_INKSET:
*va_arg(ap, uint16 *) = INKSET_CMYK;
return 1;
case TIFFTAG_NUMBEROFINKS:
*va_arg(ap, uint16 *) = 4;
return (1);
case TIFFTAG_EXTRASAMPLES:
*va_arg(ap, uint16 *) = td->td_extrasamples;
*va_arg(ap, uint16 **) = td->td_sampleinfo;
return (1);
case TIFFTAG_MATTEING:
*va_arg(ap, uint16 *) =
(td->td_extrasamples == 1 &&
td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
return (1);
case TIFFTAG_TILEDEPTH:
*va_arg(ap, uint32 *) = td->td_tiledepth;
return (1);
case TIFFTAG_DATATYPE:
*va_arg(ap, uint16 *) = td->td_sampleformat-1;
return (1);
case TIFFTAG_SAMPLEFORMAT:
*va_arg(ap, uint16 *) = td->td_sampleformat;
return(1);
case TIFFTAG_IMAGEDEPTH:
*va_arg(ap, uint32 *) = td->td_imagedepth;
return (1);
case TIFFTAG_YCBCRCOEFFICIENTS:
{
/* defaults are from CCIR Recommendation 601-1 */
static float ycbcrcoeffs[] = { 0.299f, 0.587f, 0.114f };
*va_arg(ap, float **) = ycbcrcoeffs;
return 1;
}
case TIFFTAG_YCBCRSUBSAMPLING:
*va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
*va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
return (1);
case TIFFTAG_YCBCRPOSITIONING:
*va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
return (1);
case TIFFTAG_WHITEPOINT:
{
static float whitepoint[2];
/* TIFF 6.0 specification tells that it is no default
value for the WhitePoint, but AdobePhotoshop TIFF
Technical Note tells that it should be CIE D50. */
whitepoint[0] = D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
whitepoint[1] = D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
*va_arg(ap, float **) = whitepoint;
return 1;
}
case TIFFTAG_TRANSFERFUNCTION:
if (!td->td_transferfunction[0] &&
!TIFFDefaultTransferFunction(td)) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space for \"TransferFunction\" tag");
return (0);
}
*va_arg(ap, uint16 **) = td->td_transferfunction[0];
if (td->td_samplesperpixel - td->td_extrasamples > 1) {
*va_arg(ap, uint16 **) = td->td_transferfunction[1];
*va_arg(ap, uint16 **) = td->td_transferfunction[2];
}
return (1);
case TIFFTAG_REFERENCEBLACKWHITE:
if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
return (0);
*va_arg(ap, float **) = td->td_refblackwhite;
return (1);
}
return 0;
}
/*
* Like TIFFGetField, but return any default
* value if the tag is not present in the directory.
*/
int
TIFFGetFieldDefaulted(TIFF* tif, uint32 tag, ...)
{
int ok;
va_list ap;
va_start(ap, tag);
ok = TIFFVGetFieldDefaulted(tif, tag, ap);
va_end(ap);
return (ok);
}
struct _Int64Parts {
int32 low, high;
};
typedef union {
struct _Int64Parts part;
int64 value;
} _Int64;
float
_TIFFUInt64ToFloat(uint64 ui64)
{
_Int64 i;
i.value = ui64;
if (i.part.high >= 0) {
return (float)i.value;
} else {
long double df;
df = (long double)i.value;
df += 18446744073709551616.0; /* adding 2**64 */
return (float)df;
}
}
double
_TIFFUInt64ToDouble(uint64 ui64)
{
_Int64 i;
i.value = ui64;
if (i.part.high >= 0) {
return (double)i.value;
} else {
long double df;
df = (long double)i.value;
df += 18446744073709551616.0; /* adding 2**64 */
return (double)df;
}
}
int _TIFFSeekOK(TIFF* tif, toff_t off)
{
/* Huge offsets, especially -1 / UINT64_MAX, can cause issues */
/* See http://bugzilla.maptools.org/show_bug.cgi?id=2726 */
return off <= (~(uint64)0)/2 && TIFFSeekFile(tif,off,SEEK_SET)==off;
}
/* vim: set ts=8 sts=8 sw=8 noet: */
/*
* Local Variables:
* mode: c
* c-basic-offset: 8
* fill-column: 78
* End:
*/