src/tiff/tif_aux.c

/* $Header$ */

/*
 * 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_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);
}
Commit	Line	Data
	1	/* $Header$ */
	2
	3	/*
	4	* Copyright (c) 1991-1997 Sam Leffler
	5	* Copyright (c) 1991-1997 Silicon Graphics, Inc.
	6	*
	7	* Permission to use, copy, modify, distribute, and sell this software and
	8	* its documentation for any purpose is hereby granted without fee, provided
	9	* that (i) the above copyright notices and this permission notice appear in
	10	* all copies of the software and related documentation, and (ii) the names of
	11	* Sam Leffler and Silicon Graphics may not be used in any advertising or
	12	* publicity relating to the software without the specific, prior written
	13	* permission of Sam Leffler and Silicon Graphics.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
	16	* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
	17	* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
	18	*
	19	* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
	20	* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
	21	* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
	22	* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
	23	* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	24	* OF THIS SOFTWARE.
	25	*/
	26
	27	/*
	28	* TIFF Library.
	29	*
	30	* Auxiliary Support Routines.
	31	*/
	32	#include "tiffiop.h"
	33
	34	#ifdef COLORIMETRY_SUPPORT
	35	#include <math.h>
	36
	37	static void
	38	TIFFDefaultTransferFunction(TIFFDirectory* td)
	39	{
	40	uint16 **tf = td->td_transferfunction;
	41	long i, n = 1<<td->td_bitspersample;
	42
	43	tf[0] = (uint16 )_TIFFmalloc(n sizeof (uint16));
	44	tf[0][0] = 0;
	45	for (i = 1; i < n; i++) {
	46	double t = (double)i/((double) n-1.);
	47	tf[0][i] = (uint16)floor(65535.*pow(t, 2.2) + .5);
	48	}
	49	if (td->td_samplesperpixel - td->td_extrasamples > 1) {
	50	tf[1] = (uint16 )_TIFFmalloc(n sizeof (uint16));
	51	_TIFFmemcpy(tf[1], tf[0], n * sizeof (uint16));
	52	tf[2] = (uint16 )_TIFFmalloc(n sizeof (uint16));
	53	_TIFFmemcpy(tf[2], tf[0], n * sizeof (uint16));
	54	}
	55	}
	56
	57	static void
	58	TIFFDefaultRefBlackWhite(TIFFDirectory* td)
	59	{
	60	int i;
	61
	62	td->td_refblackwhite = (float )_TIFFmalloc(6sizeof (float));
	63	for (i = 0; i < 3; i++) {
	64	td->td_refblackwhite[2*i+0] = 0;
	65	td->td_refblackwhite[2*i+1] = (float)((1L<<td->td_bitspersample)-1L);
	66	}
	67	}
	68	#endif
	69
	70	/*
	71	* Like TIFFGetField, but return any default
	72	* value if the tag is not present in the directory.
	73	*
	74	* NB: We use the value in the directory, rather than
	75	* explcit values so that defaults exist only one
	76	* place in the library -- in TIFFDefaultDirectory.
	77	*/
	78	int
	79	TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list ap)
	80	{
	81	TIFFDirectory *td = &tif->tif_dir;
	82
	83	if (TIFFVGetField(tif, tag, ap))
	84	return (1);
	85	switch (tag) {
	86	case TIFFTAG_SUBFILETYPE:
	87	va_arg(ap, uint32 ) = td->td_subfiletype;
	88	return (1);
	89	case TIFFTAG_BITSPERSAMPLE:
	90	va_arg(ap, uint16 ) = td->td_bitspersample;
	91	return (1);
	92	case TIFFTAG_THRESHHOLDING:
	93	va_arg(ap, uint16 ) = td->td_threshholding;
	94	return (1);
	95	case TIFFTAG_FILLORDER:
	96	va_arg(ap, uint16 ) = td->td_fillorder;
	97	return (1);
	98	case TIFFTAG_ORIENTATION:
	99	va_arg(ap, uint16 ) = td->td_orientation;
	100	return (1);
	101	case TIFFTAG_SAMPLESPERPIXEL:
	102	va_arg(ap, uint16 ) = td->td_samplesperpixel;
	103	return (1);
	104	case TIFFTAG_ROWSPERSTRIP:
	105	va_arg(ap, uint32 ) = td->td_rowsperstrip;
	106	return (1);
	107	case TIFFTAG_MINSAMPLEVALUE:
	108	va_arg(ap, uint16 ) = td->td_minsamplevalue;
	109	return (1);
	110	case TIFFTAG_MAXSAMPLEVALUE:
	111	va_arg(ap, uint16 ) = td->td_maxsamplevalue;
	112	return (1);
	113	case TIFFTAG_PLANARCONFIG:
	114	va_arg(ap, uint16 ) = td->td_planarconfig;
	115	return (1);
	116	case TIFFTAG_RESOLUTIONUNIT:
	117	va_arg(ap, uint16 ) = td->td_resolutionunit;
	118	return (1);
	119	#ifdef CMYK_SUPPORT
	120	case TIFFTAG_DOTRANGE:
	121	va_arg(ap, uint16 ) = 0;
	122	va_arg(ap, uint16 ) = (1<<td->td_bitspersample)-1;
	123	return (1);
	124	case TIFFTAG_INKSET:
	125	va_arg(ap, uint16 ) = td->td_inkset;
	126	return (1);
	127	case TIFFTAG_NUMBEROFINKS:
	128	va_arg(ap, uint16 ) = td->td_ninks;
	129	return (1);
	130	#endif
	131	case TIFFTAG_EXTRASAMPLES:
	132	va_arg(ap, uint16 ) = td->td_extrasamples;
	133	va_arg(ap, uint16 *) = td->td_sampleinfo;
	134	return (1);
	135	case TIFFTAG_MATTEING:
	136	va_arg(ap, uint16 ) =
	137	(td->td_extrasamples == 1 &&
	138	td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
	139	return (1);
	140	case TIFFTAG_TILEDEPTH:
	141	va_arg(ap, uint32 ) = td->td_tiledepth;
	142	return (1);
	143	case TIFFTAG_DATATYPE:
	144	va_arg(ap, uint16 ) = td->td_sampleformat-1;
	145	return (1);
	146	case TIFFTAG_IMAGEDEPTH:
	147	va_arg(ap, uint32 ) = td->td_imagedepth;
	148	return (1);
	149	#ifdef YCBCR_SUPPORT
	150	case TIFFTAG_YCBCRCOEFFICIENTS:
	151	if (!td->td_ycbcrcoeffs) {
	152	td->td_ycbcrcoeffs = (float *)
	153	_TIFFmalloc(3*sizeof (float));
	154	/* defaults are from CCIR Recommendation 601-1 */
	155	td->td_ycbcrcoeffs[0] = 0.299f;
	156	td->td_ycbcrcoeffs[1] = 0.587f;
	157	td->td_ycbcrcoeffs[2] = 0.114f;
	158	}
	159	va_arg(ap, float *) = td->td_ycbcrcoeffs;
	160	return (1);
	161	case TIFFTAG_YCBCRSUBSAMPLING:
	162	va_arg(ap, uint16 ) = td->td_ycbcrsubsampling[0];
	163	va_arg(ap, uint16 ) = td->td_ycbcrsubsampling[1];
	164	return (1);
	165	case TIFFTAG_YCBCRPOSITIONING:
	166	va_arg(ap, uint16 ) = td->td_ycbcrpositioning;
	167	return (1);
	168	#endif
	169	#ifdef COLORIMETRY_SUPPORT
	170	case TIFFTAG_TRANSFERFUNCTION:
	171	if (!td->td_transferfunction[0])
	172	TIFFDefaultTransferFunction(td);
	173	va_arg(ap, uint16 *) = td->td_transferfunction[0];
	174	if (td->td_samplesperpixel - td->td_extrasamples > 1) {
	175	va_arg(ap, uint16 *) = td->td_transferfunction[1];
	176	va_arg(ap, uint16 *) = td->td_transferfunction[2];
	177	}
	178	return (1);
	179	case TIFFTAG_REFERENCEBLACKWHITE:
	180	if (!td->td_refblackwhite)
	181	TIFFDefaultRefBlackWhite(td);
	182	va_arg(ap, float *) = td->td_refblackwhite;
	183	return (1);
	184	#endif
	185	}
	186	return (0);
	187	}
	188
	189	/*
	190	* Like TIFFGetField, but return any default
	191	* value if the tag is not present in the directory.
	192	*/
	193	int
	194	TIFFGetFieldDefaulted(TIFF* tif, ttag_t tag, ...)
	195	{
	196	int ok;
	197	va_list ap;
	198
	199	va_start(ap, tag);
	200	ok = TIFFVGetFieldDefaulted(tif, tag, ap);
	201	va_end(ap);
	202	return (ok);
	203	}