/* Id */ /* * 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 tdata_t _TIFFCheckMalloc(TIFF* tif, size_t nmemb, size_t elem_size, const char* what) { tdata_t cp = NULL; tsize_t bytes = nmemb * elem_size; /* * XXX: Check for integer overflow. */ if (nmemb && elem_size && bytes / elem_size == nmemb) cp = _TIFFmalloc(bytes); if (cp == NULL) TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space %s", what); return (cp); } 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_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; } /* * 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_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: { int i; static float ycbcr_refblackwhite[] = { 0.0F, 255.0F, 128.0F, 255.0F, 128.0F, 255.0F }; static float rgb_refblackwhite[6]; for (i = 0; i < 3; i++) { rgb_refblackwhite[2 * i + 0] = 0.0F; rgb_refblackwhite[2 * i + 1] = (float)((1L<td_bitspersample)-1L); } if (td->td_photometric == PHOTOMETRIC_YCBCR) { /* * YCbCr (Class Y) images must have the * ReferenceBlackWhite tag set. Fix the * broken images, which lacks that tag. */ *va_arg(ap, float **) = ycbcr_refblackwhite; } else { /* * Assume RGB (Class R) */ *va_arg(ap, float **) = rgb_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: */