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- #ifndef lint
- static char rcsid[] = "$Header: /usr/people/sam/tiff/libtiff/RCS/tif_aux.c,v 1.8 92/03/27 14:53:02 sam Exp $";
- #endif
-
- /*
- * Copyright (c) 1991, 1992 Sam Leffler
- * Copyright (c) 1991, 1992 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 "prototypes.h"
-
- /*
- * 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.
- */
- TIFFVGetFieldDefaulted(tif, tag, ap)
- TIFF *tif;
- int tag;
- va_list ap;
- {
- TIFFDirectory *td = &tif->tif_dir;
- int i;
-
- if (TIFFVGetField(tif, tag, ap))
- return (1);
- switch (tag) {
- case TIFFTAG_SUBFILETYPE:
- *va_arg(ap, u_short *) = td->td_subfiletype;
- return (1);
- case TIFFTAG_BITSPERSAMPLE:
- *va_arg(ap, u_short *) = td->td_bitspersample;
- return (1);
- case TIFFTAG_THRESHHOLDING:
- *va_arg(ap, u_short *) = td->td_threshholding;
- return (1);
- case TIFFTAG_FILLORDER:
- *va_arg(ap, u_short *) = td->td_fillorder;
- return (1);
- case TIFFTAG_ORIENTATION:
- *va_arg(ap, u_short *) = td->td_orientation;
- return (1);
- case TIFFTAG_SAMPLESPERPIXEL:
- *va_arg(ap, u_short *) = td->td_samplesperpixel;
- return (1);
- case TIFFTAG_ROWSPERSTRIP:
- *va_arg(ap, u_long *) = td->td_rowsperstrip;
- return (1);
- case TIFFTAG_MINSAMPLEVALUE:
- *va_arg(ap, u_short *) = td->td_minsamplevalue;
- return (1);
- case TIFFTAG_MAXSAMPLEVALUE:
- *va_arg(ap, u_short *) = td->td_maxsamplevalue;
- return (1);
- case TIFFTAG_PLANARCONFIG:
- *va_arg(ap, u_short *) = td->td_planarconfig;
- return (1);
- case TIFFTAG_GROUP4OPTIONS:
- *va_arg(ap, u_long *) = td->td_group4options;
- return (1);
- case TIFFTAG_RESOLUTIONUNIT:
- *va_arg(ap, u_short *) = td->td_resolutionunit;
- return (1);
- case TIFFTAG_PREDICTOR:
- *va_arg(ap, u_short *) = td->td_predictor;
- return (1);
- #ifdef CMYK_SUPPORT
- case TIFFTAG_DOTRANGE:
- *va_arg(ap, u_short *) = 0;
- *va_arg(ap, u_short *) = (1<<td->td_bitspersample)-1;
- return (1);
- case TIFFTAG_INKSET:
- *va_arg(ap, u_short *) = td->td_inkset;
- return (1);
- #endif
- case TIFFTAG_TILEDEPTH:
- *va_arg(ap, u_long *) = td->td_tiledepth;
- return (1);
- case TIFFTAG_DATATYPE:
- *va_arg(ap, u_short *) = td->td_sampleformat-1;
- return (1);
- case TIFFTAG_IMAGEDEPTH:
- *va_arg(ap, u_short *) = td->td_imagedepth;
- return (1);
- #ifdef YCBCR_SUPPORT
- case TIFFTAG_YCBCRCOEFFICIENTS:
- if (!td->td_ycbcrcoeffs) {
- td->td_ycbcrcoeffs = (float *)malloc(3*sizeof (float));
- /* defaults are from CCIR Recommendation 601-1 */
- td->td_ycbcrcoeffs[0] = .299;
- td->td_ycbcrcoeffs[1] = .587;
- td->td_ycbcrcoeffs[2] = .114;
- }
- *va_arg(ap, float **) = td->td_ycbcrcoeffs;
- return (1);
- case TIFFTAG_YCBCRSUBSAMPLING:
- *va_arg(ap, u_short *) = td->td_ycbcrsubsampling[0];
- *va_arg(ap, u_short *) = td->td_ycbcrsubsampling[1];
- return (1);
- case TIFFTAG_YCBCRPOSITIONING:
- *va_arg(ap, u_short *) = td->td_ycbcrpositioning;
- return (1);
- #endif
- #ifdef COLORIMETRY_SUPPORT
- case TIFFTAG_TRANSFERFUNCTION:
- if (!td->td_transferfunction[0]) {
- u_short **tf = td->td_transferfunction;
- int n = 1<<td->td_bitspersample;
-
- tf[0] = (u_short *)malloc(n * sizeof (u_short));
- tf[0][0] = 0;
- for (i = 1; i < n; i++)
- tf[0][i] = (u_short)
- floor(65535.*pow(i/(n-1.), 2.2) + .5);
- for (i = 1; i < td->td_samplesperpixel; i++) {
- tf[i] = (u_short *)malloc(n * sizeof (u_short));
- bcopy(tf[0], tf[i], n * sizeof (u_short));
- }
- }
- for (i = 0; i < td->td_samplesperpixel; i++)
- *va_arg(ap, u_short **) = td->td_transferfunction[i];
- return (1);
- case TIFFTAG_REFERENCEBLACKWHITE:
- if (!td->td_refblackwhite) {
- td->td_refblackwhite = (float *)
- malloc(2*td->td_samplesperpixel * sizeof (float));
- for (i = 0; i < td->td_samplesperpixel; i++) {
- td->td_refblackwhite[2*i+0] = 0;
- td->td_refblackwhite[2*i+1] = 1L<<td->td_bitspersample;
- }
- }
- *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.
- */
- /*VARARGS2*/
- DECLARE2V(TIFFGetFieldDefaulted, TIFF*, tif, int, tag)
- {
- int ok;
- va_list ap;
-
- VA_START(ap, tag);
- ok = TIFFVGetFieldDefaulted(tif, tag, ap);
- va_end(ap);
- return (ok);
- }
-