diff options
Diffstat (limited to 'src/3rdparty/libtiff/libtiff/tif_dirread.c')
-rw-r--r-- | src/3rdparty/libtiff/libtiff/tif_dirread.c | 107 |
1 files changed, 84 insertions, 23 deletions
diff --git a/src/3rdparty/libtiff/libtiff/tif_dirread.c b/src/3rdparty/libtiff/libtiff/tif_dirread.c index aa258ba..e80a3b1 100644 --- a/src/3rdparty/libtiff/libtiff/tif_dirread.c +++ b/src/3rdparty/libtiff/libtiff/tif_dirread.c @@ -1,5 +1,3 @@ -/* $Id: tif_dirread.c,v 1.218 2017-09-09 21:44:42 erouault Exp $ */ - /* * Copyright (c) 1988-1997 Sam Leffler * Copyright (c) 1991-1997 Silicon Graphics, Inc. @@ -167,6 +165,7 @@ static int TIFFFetchStripThing(TIFF* tif, TIFFDirEntry* dir, uint32 nstrips, uin static int TIFFFetchSubjectDistance(TIFF*, TIFFDirEntry*); static void ChopUpSingleUncompressedStrip(TIFF*); static uint64 TIFFReadUInt64(const uint8 *value); +static int _TIFFGetMaxColorChannels(uint16 photometric); static int _TIFFFillStrilesInternal( TIFF *tif, int loadStripByteCount ); @@ -776,7 +775,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryIfd8(TIFF* tif, TIFFDirEntry* di static enum TIFFReadDirEntryErr TIFFReadDirEntryDataAndRealloc( TIFF* tif, uint64 offset, tmsize_t size, void** pdest) { -#if SIZEOF_VOIDP == 8 || SIZEOF_SIZE_T == 8 +#if SIZEOF_SIZE_T == 8 tmsize_t threshold = INITIAL_THRESHOLD; #endif tmsize_t already_read = 0; @@ -797,7 +796,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryDataAndRealloc( void* new_dest; tmsize_t bytes_read; tmsize_t to_read = size - already_read; -#if SIZEOF_VOIDP == 8 || SIZEOF_SIZE_T == 8 +#if SIZEOF_SIZE_T == 8 if( to_read >= threshold && threshold < MAX_THRESHOLD ) { to_read = threshold; @@ -3507,6 +3506,35 @@ static void TIFFReadDirEntryOutputErr(TIFF* tif, enum TIFFReadDirEntryErr err, c } /* + * Return the maximum number of color channels specified for a given photometric + * type. 0 is returned if photometric type isn't supported or no default value + * is defined by the specification. + */ +static int _TIFFGetMaxColorChannels( uint16 photometric ) +{ + switch (photometric) { + case PHOTOMETRIC_PALETTE: + case PHOTOMETRIC_MINISWHITE: + case PHOTOMETRIC_MINISBLACK: + return 1; + case PHOTOMETRIC_YCBCR: + case PHOTOMETRIC_RGB: + case PHOTOMETRIC_CIELAB: + case PHOTOMETRIC_LOGLUV: + case PHOTOMETRIC_ITULAB: + case PHOTOMETRIC_ICCLAB: + return 3; + case PHOTOMETRIC_SEPARATED: + case PHOTOMETRIC_MASK: + return 4; + case PHOTOMETRIC_LOGL: + case PHOTOMETRIC_CFA: + default: + return 0; + } +} + +/* * Read the next TIFF directory from a file and convert it to the internal * format. We read directories sequentially. */ @@ -3522,6 +3550,7 @@ TIFFReadDirectory(TIFF* tif) uint32 fii=FAILED_FII; toff_t nextdiroff; int bitspersample_read = FALSE; + int color_channels; tif->tif_diroff=tif->tif_nextdiroff; if (!TIFFCheckDirOffset(tif,tif->tif_nextdiroff)) @@ -4026,6 +4055,37 @@ TIFFReadDirectory(TIFF* tif) } } } + + /* + * Make sure all non-color channels are extrasamples. + * If it's not the case, define them as such. + */ + color_channels = _TIFFGetMaxColorChannels(tif->tif_dir.td_photometric); + if (color_channels && tif->tif_dir.td_samplesperpixel - tif->tif_dir.td_extrasamples > color_channels) { + uint16 old_extrasamples; + uint16 *new_sampleinfo; + + TIFFWarningExt(tif->tif_clientdata,module, "Sum of Photometric type-related " + "color channels and ExtraSamples doesn't match SamplesPerPixel. " + "Defining non-color channels as ExtraSamples."); + + old_extrasamples = tif->tif_dir.td_extrasamples; + tif->tif_dir.td_extrasamples = (uint16) (tif->tif_dir.td_samplesperpixel - color_channels); + + // sampleinfo should contain information relative to these new extra samples + new_sampleinfo = (uint16*) _TIFFcalloc(tif->tif_dir.td_extrasamples, sizeof(uint16)); + if (!new_sampleinfo) { + TIFFErrorExt(tif->tif_clientdata, module, "Failed to allocate memory for " + "temporary new sampleinfo array (%d 16 bit elements)", + tif->tif_dir.td_extrasamples); + goto bad; + } + + memcpy(new_sampleinfo, tif->tif_dir.td_sampleinfo, old_extrasamples * sizeof(uint16)); + _TIFFsetShortArray(&tif->tif_dir.td_sampleinfo, new_sampleinfo, tif->tif_dir.td_extrasamples); + _TIFFfree(new_sampleinfo); + } + /* * Verify Palette image has a Colormap. */ @@ -4881,17 +4941,18 @@ TIFFFetchNormalTag(TIFF* tif, TIFFDirEntry* dp, int recover) err=TIFFReadDirEntryByteArray(tif,dp,&data); if (err==TIFFReadDirEntryErrOk) { - uint8* ma; - uint32 mb; + uint32 mb = 0; int n; - ma=data; - mb=0; - while (mb<(uint32)dp->tdir_count) + if (data != NULL) { - if (*ma==0) - break; - ma++; - mb++; + uint8* ma = data; + while (mb<(uint32)dp->tdir_count) + { + if (*ma==0) + break; + ma++; + mb++; + } } if (mb+1<(uint32)dp->tdir_count) TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" contains null byte in value; value incorrectly truncated during reading due to implementation limitations",fip->field_name); @@ -5141,11 +5202,11 @@ TIFFFetchNormalTag(TIFF* tif, TIFFDirEntry* dp, int recover) if (err==TIFFReadDirEntryErrOk) { int m; - if( dp->tdir_count > 0 && data[dp->tdir_count-1] != '\0' ) - { - TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" does not end in null byte. Forcing it to be null",fip->field_name); - data[dp->tdir_count-1] = '\0'; - } + if( data != 0 && dp->tdir_count > 0 && data[dp->tdir_count-1] != '\0' ) + { + TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" does not end in null byte. Forcing it to be null",fip->field_name); + data[dp->tdir_count-1] = '\0'; + } m=TIFFSetField(tif,dp->tdir_tag,(uint16)(dp->tdir_count),data); if (data!=0) _TIFFfree(data); @@ -5318,11 +5379,11 @@ TIFFFetchNormalTag(TIFF* tif, TIFFDirEntry* dp, int recover) if (err==TIFFReadDirEntryErrOk) { int m; - if( dp->tdir_count > 0 && data[dp->tdir_count-1] != '\0' ) - { - TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" does not end in null byte. Forcing it to be null",fip->field_name); - data[dp->tdir_count-1] = '\0'; - } + if( data != 0 && dp->tdir_count > 0 && data[dp->tdir_count-1] != '\0' ) + { + TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" does not end in null byte. Forcing it to be null",fip->field_name); + data[dp->tdir_count-1] = '\0'; + } m=TIFFSetField(tif,dp->tdir_tag,(uint32)(dp->tdir_count),data); if (data!=0) _TIFFfree(data); |