This document provides a summary of significant changes made to the software between the previous and current versions (see above). A fully-detailed change summary is provided by the ChangeLog file included in the release package and by the Git commit history:

• Major Changes
• Changes in the software configuration
• Changes in libtiff
• Changes in the tools
• Changes in the contrib area

None

• Handle absolute paths in pkg-config file (#333)
• Correct fix for the pkgconf file relative paths.
• cmake: allow running the tests with a read-only source directory.
• cmake: Fix STRIPCHOP_DEFAULT value in CMake builds.
• build: Fix static library imports in mingw related to LERC
• Fix version in libtiff-4.pc.in, and CMake build: Add requirements to pc file
• cmake: Fix build with CMake 3.10.
• cmake: Export tiff targets.
• Make LERC_SUPPORT conditional on ZLIB_SUPPORT

New/improved functionalities:

• TIFFIsBigTiff() function added.
• Functions TIFFFieldSetGetSize() and TIFFieldSetGetCountSize() added.
• LZWDecode(): major speed improvements (~30% faster)
• Predictor 2 (horizontal differenciation): support 64-bit
• Support libjpeg 9d

Bug fixes:

• Remove incorrect assert (#329)
• avoid hang in TIFFRewriteDirectory() if a classic file > 4 GB is attempted to be created
• tif_jbig.c: fix crash when reading a file with multiple IFD in memory-mapped mode and when bit reversal is needed (fixes #385)
• TIFFFetchNormalTag(): avoid calling memcpy() with a null source pointer and size of zero (fixes #383)
• TIFFWriteDirectoryTagData(): turn assertion on data length into a runtime check
• TIFFFetchStripThing(): avoid calling memcpy() with a null source pointer and size of zero (fixes #362)
• TIFFReadDirectory(): avoid calling memcpy() with a null source pointer and size of zero (fixes #362)
• TIFFYCbCrToRGBInit(): avoid Integer-overflow
• TIFFGetField(TIFFTAG_STRIPBYTECOUNTS/TIFFTAG_STRIPOFFSETS): return error if returned pointer is NULL (fixes #342)
• OJPEG: avoid assertion when using TIFFReadScanline() (fixes #337)
• TIFFReadDirectory: fix OJPEG hack (fixes #319)
• LZW codec: fix support for strips/tiles > 2 GB on Windows
• TIFFAppendToStrip(): fix rewrite-in-place logic (fixes #309)
• Fix TIFFRewriteDirectory discarding directories.
• TIFFReadCustomDirectory(): avoid crash when reading SubjectDistance tag on a non EXIF directory (#316)
• Fix Segmentation fault printing GPS directory if Altitude tag is present
• tif_jpeg.c: do not emit progressive scans with mozjpeg. (#266)
• _TIFFRewriteField(): fix when writing a IFD with a single tile that is a sparse one, on big endian hosts
• Fix all remaining uses of legacy Deflate compression id and warn on use.

Bug fixes:

• tiffcrop: Fix issue #330 and some more from 320 to 349.
• tiffcrop: fix issue #395: generation of strange section images.
• tiffcrop: fix issue #380 and #382 heap buffer overflow in extractImageSection
• tiffcrop: fix FPE (#393)
• tiffcrop: buffsize check formula in loadImage() amended (fixes #273,#275)
• tiffcrop.c: Fix issue #352 heap-buffer-overflow by correcting uint32_t underflow.
• tiff2pdf: handle 8-bit palette colormap.
• tiffcp: avoid buffer overflow in "mode" string (fixes #400)
• tiffcp: Fix incomprehensible setting of orientation tag (fixes #29)
• tiffcp: do not try to fetch compressor-specific tags when not appropriate (fixes #396)
• tiffcp: fix heap buffer overflow (#278)
• tiff2ps: In limitMalloc() check for negative size (fixes #284)
• tiffinfo: add a -M switch to define the maximum heap allocation, and default it to 256 MiB (fixes #287, #290)
• tiffinfo: limit more memory allocations using -M switch (fixes #288)
• tiffset: fix global-buffer-overflow for ASCII tags where count is required (fixes #355)
• raw2tiff: check that band number if not zero to avoid floating point exception(fixes #338)
• tiffinfo/tiffdump: improve output for GDAL tags.

None