207 lines
6.0 KiB
C
207 lines
6.0 KiB
C
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_aux.c,v 1.3 2000-03-03 15:22:00 warmerda 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"
|
|
|
|
#ifdef COLORIMETRY_SUPPORT
|
|
#include <math.h>
|
|
|
|
static void
|
|
TIFFDefaultTransferFunction(TIFFDirectory* td)
|
|
{
|
|
uint16 **tf = td->td_transferfunction;
|
|
long i, n = 1<<td->td_bitspersample;
|
|
|
|
tf[0] = (uint16 *)_TIFFmalloc(n * sizeof (uint16));
|
|
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(n * sizeof (uint16));
|
|
_TIFFmemcpy(tf[1], tf[0], n * sizeof (uint16));
|
|
tf[2] = (uint16 *)_TIFFmalloc(n * sizeof (uint16));
|
|
_TIFFmemcpy(tf[2], tf[0], n * sizeof (uint16));
|
|
}
|
|
}
|
|
|
|
static void
|
|
TIFFDefaultRefBlackWhite(TIFFDirectory* td)
|
|
{
|
|
int i;
|
|
|
|
td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float));
|
|
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);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 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
|
|
* explcit values so that defaults exist only one
|
|
* place in the library -- in TIFFDefaultDirectory.
|
|
*/
|
|
int
|
|
TIFFVGetFieldDefaulted(TIFF* tif, ttag_t 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);
|
|
#ifdef CMYK_SUPPORT
|
|
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 *) = td->td_inkset;
|
|
return (1);
|
|
case TIFFTAG_NUMBEROFINKS:
|
|
*va_arg(ap, uint16 *) = td->td_ninks;
|
|
return (1);
|
|
#endif
|
|
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);
|
|
#ifdef YCBCR_SUPPORT
|
|
case TIFFTAG_YCBCRCOEFFICIENTS:
|
|
if (!td->td_ycbcrcoeffs) {
|
|
td->td_ycbcrcoeffs = (float *)
|
|
_TIFFmalloc(3*sizeof (float));
|
|
/* defaults are from CCIR Recommendation 601-1 */
|
|
td->td_ycbcrcoeffs[0] = 0.299f;
|
|
td->td_ycbcrcoeffs[1] = 0.587f;
|
|
td->td_ycbcrcoeffs[2] = 0.114f;
|
|
}
|
|
*va_arg(ap, float **) = td->td_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);
|
|
#endif
|
|
#ifdef COLORIMETRY_SUPPORT
|
|
case TIFFTAG_TRANSFERFUNCTION:
|
|
if (!td->td_transferfunction[0])
|
|
TIFFDefaultTransferFunction(td);
|
|
*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);
|
|
*va_arg(ap, float **) = td->td_refblackwhite;
|
|
return (1);
|
|
#endif
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Like TIFFGetField, but return any default
|
|
* value if the tag is not present in the directory.
|
|
*/
|
|
int
|
|
TIFFGetFieldDefaulted(TIFF* tif, ttag_t tag, ...)
|
|
{
|
|
int ok;
|
|
va_list ap;
|
|
|
|
va_start(ap, tag);
|
|
ok = TIFFVGetFieldDefaulted(tif, tag, ap);
|
|
va_end(ap);
|
|
return (ok);
|
|
}
|