diff options
Diffstat (limited to 'src/3rdparty/libtiff/libtiff/tif_aux.c')
| -rw-r--r-- | src/3rdparty/libtiff/libtiff/tif_aux.c | 169 |
1 files changed, 126 insertions, 43 deletions
diff --git a/src/3rdparty/libtiff/libtiff/tif_aux.c b/src/3rdparty/libtiff/libtiff/tif_aux.c index 43d591b38a..927150a493 100644 --- a/src/3rdparty/libtiff/libtiff/tif_aux.c +++ b/src/3rdparty/libtiff/libtiff/tif_aux.c @@ -1,4 +1,4 @@ -/* $Id: tif_aux.c,v 1.20 2006/06/08 14:24:13 dron Exp $ */ +/* $Id: tif_aux.c,v 1.26 2010-07-01 15:33:28 dron Exp $ */ /* * Copyright (c) 1991-1997 Sam Leffler @@ -33,12 +33,38 @@ #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) +uint32 +_TIFFMultiply32(TIFF* tif, uint32 first, uint32 second, const char* where) { - tdata_t cp = NULL; - tsize_t bytes = nmemb * elem_size; + uint32 bytes = first * second; + + if (second && bytes / second != first) { + TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where); + bytes = 0; + } + + return bytes; +} + +uint64 +_TIFFMultiply64(TIFF* tif, uint64 first, uint64 second, const char* where) +{ + uint64 bytes = first * second; + + if (second && bytes / second != first) { + TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where); + bytes = 0; + } + + return bytes; +} + +void* +_TIFFCheckRealloc(TIFF* tif, void* buffer, + tmsize_t nmemb, tmsize_t elem_size, const char* what) +{ + void* cp = NULL; + tmsize_t bytes = nmemb * elem_size; /* * XXX: Check for integer overflow. @@ -46,30 +72,33 @@ _TIFFCheckRealloc(TIFF* tif, tdata_t buffer, if (nmemb && elem_size && bytes / elem_size == nmemb) cp = _TIFFrealloc(buffer, bytes); - if (cp == NULL) + if (cp == NULL) { TIFFErrorExt(tif->tif_clientdata, tif->tif_name, - "No space %s", what); + "Failed to allocate memory for %s " + "(%ld elements of %ld bytes each)", + what,(long) nmemb, (long) elem_size); + } return cp; } -tdata_t -_TIFFCheckMalloc(TIFF* tif, size_t nmemb, size_t elem_size, const char* what) +void* +_TIFFCheckMalloc(TIFF* tif, tmsize_t nmemb, tmsize_t elem_size, const char* what) { - return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what); + return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what); } static int TIFFDefaultTransferFunction(TIFFDirectory* td) { uint16 **tf = td->td_transferfunction; - tsize_t i, n, nbytes; + tmsize_t i, n, nbytes; tf[0] = tf[1] = tf[2] = 0; - if (td->td_bitspersample >= sizeof(tsize_t) * 8 - 2) + if (td->td_bitspersample >= sizeof(tmsize_t) * 8 - 2) return 0; - n = 1<<td->td_bitspersample; + n = ((tmsize_t)1)<<td->td_bitspersample; nbytes = n * sizeof (uint16); if (!(tf[0] = (uint16 *)_TIFFmalloc(nbytes))) return 0; @@ -100,6 +129,35 @@ bad: 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. @@ -109,7 +167,7 @@ bad: * place in the library -- in TIFFDefaultDirectory. */ int -TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list ap) +TIFFVGetFieldDefaulted(TIFF* tif, uint32 tag, va_list ap) { TIFFDirectory *td = &tif->tif_dir; @@ -225,33 +283,10 @@ TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list ap) } 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; - } + if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td)) + return (0); + *va_arg(ap, float **) = td->td_refblackwhite; + return (1); } return 0; } @@ -261,7 +296,7 @@ TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list ap) * value if the tag is not present in the directory. */ int -TIFFGetFieldDefaulted(TIFF* tif, ttag_t tag, ...) +TIFFGetFieldDefaulted(TIFF* tif, uint32 tag, ...) { int ok; va_list ap; @@ -272,4 +307,52 @@ TIFFGetFieldDefaulted(TIFF* tif, ttag_t tag, ...) return (ok); } +struct _Int64Parts { + int32 low, high; +}; + +typedef union { + struct _Int64Parts part; + int64 value; +} _Int64; + +float +_TIFFUInt64ToFloat(uint64 ui64) +{ + _Int64 i; + + i.value = ui64; + if (i.part.high >= 0) { + return (float)i.value; + } else { + long double df; + df = (long double)i.value; + df += 18446744073709551616.0; /* adding 2**64 */ + return (float)df; + } +} + +double +_TIFFUInt64ToDouble(uint64 ui64) +{ + _Int64 i; + + i.value = ui64; + if (i.part.high >= 0) { + return (double)i.value; + } else { + long double df; + df = (long double)i.value; + df += 18446744073709551616.0; /* adding 2**64 */ + return (double)df; + } +} + /* vim: set ts=8 sts=8 sw=8 noet: */ +/* + * Local Variables: + * mode: c + * c-basic-offset: 8 + * fill-column: 78 + * End: + */ |