+++ /dev/null
-/* $Id: tif_aux.c,v 1.1 2005/06/17 13:54:52 vp153 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>
-
-static int
-TIFFDefaultTransferFunction(TIFFDirectory* td)
-{
- uint16 **tf = td->td_transferfunction;
- tsize_t i, n, nbytes;
-
- tf[0] = tf[1] = tf[2] = 0;
- if (td->td_bitspersample >= sizeof(tsize_t) * 8 - 2)
- return 0;
-
- n = 1<<td->td_bitspersample;
- nbytes = n * sizeof (uint16);
- if (!(tf[0] = (uint16 *)_TIFFmalloc(nbytes)))
- 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) {
- if (!(tf[1] = (uint16 *)_TIFFmalloc(nbytes)))
- goto bad;
- _TIFFmemcpy(tf[1], tf[0], nbytes);
- if (!(tf[2] = (uint16 *)_TIFFmalloc(nbytes)))
- 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;
-
- if (!(td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float))))
- 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
- * 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);
- case TIFFTAG_PREDICTOR:
- {
- TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
- *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 *) = td->td_inkset;
- return (1);
- case TIFFTAG_NUMBEROFINKS:
- *va_arg(ap, uint16 *) = td->td_ninks;
- 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:
- if (!td->td_ycbcrcoeffs) {
- td->td_ycbcrcoeffs = (float *)
- _TIFFmalloc(3*sizeof (float));
- if (!td->td_ycbcrcoeffs)
- return (0);
- /* 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);
- case TIFFTAG_WHITEPOINT:
- if (!td->td_whitepoint) {
- td->td_whitepoint = (float *)
- _TIFFmalloc(2 * sizeof (float));
- if (!td->td_whitepoint)
- return (0);
- /* TIFF 6.0 specification says that it is no default
- value for the WhitePoint, but AdobePhotoshop TIFF
- Technical Note tells that it should be CIE D50. */
- td->td_whitepoint[0] =
- D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
- td->td_whitepoint[1] =
- D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
- }
- *va_arg(ap, float **) = td->td_whitepoint;
- return (1);
- case TIFFTAG_TRANSFERFUNCTION:
- if (!td->td_transferfunction[0] &&
- !TIFFDefaultTransferFunction(td)) {
- TIFFError(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, ttag_t tag, ...)
-{
- int ok;
- va_list ap;
-
- va_start(ap, tag);
- ok = TIFFVGetFieldDefaulted(tif, tag, ap);
- va_end(ap);
- return (ok);
-}
-
-/* vim: set ts=8 sts=8 sw=8 noet: */
projects / opencv / blobdiff