| /* $Id: tif_aux.c,v 1.27 2009/09/06 13:11:27 drolon 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> |
| |
| tdata_t |
| _TIFFCheckRealloc(TIFF* tif, tdata_t buffer, |
| 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 = _TIFFrealloc(buffer, bytes); |
| |
| if (cp == NULL) |
| TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
| "No space %s", what); |
| |
| return cp; |
| } |
| |
| tdata_t |
| _TIFFCheckMalloc(TIFF* tif, size_t nmemb, size_t elem_size, const char* what) |
| { |
| return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what); |
| } |
| |
| 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; |
| } |
| |
| /* |
| * 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 *) = 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->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: */ |