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CHANGELOG.md

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Notable Changes in OpenSlide

Version 3.4.1, 2015-04-20

  • New formats: Philips TIFF, Ventana TIFF
  • Support OpenJPEG 2.1.0
  • Improve performance of JPEG and JP2K decoding
  • Add openslide.region[i].* properties
  • Improve MATLAB compatibility
  • Enable function deprecation warnings with MSVC
  • Many portability fixes
  • aperio: Detect OpenJPEG chroma subsampling breakage during open
  • aperio: Fill in missing tiles with downsampled data
  • aperio: Report MPP for slides scanned in locales with decimal comma
  • hamamatsu: Support NDPI files > 4 GB
  • hamamatsu: Properly detect NDPI slides produced by NDP.toolkit
  • hamamatsu: Support VMS/VMU slides without a NoLayers key
  • hamamatsu: Report MPP for VMS/VMU
  • leica: Support slides with 2010/03/10 XML namespace
  • leica: Base64-decode leica.barcode property in 2010/10/01 namespace
  • sakura: Support slides with multiple focal planes
  • sakura: Support slides without tile table
  • ventana: Support slides with multiple focal planes
  • ventana: Improve positioning of AOIs within level
  • ventana: Fix failure to recognize macro image on some slides

Version 3.4.0, 2014-01-25

  • Major internal restructuring
  • New formats: Hamamatsu NDPI, Sakura SVSLIDE, Ventana BIF (preliminary)
  • Add openslide_detect_vendor()
  • Deprecate openslide_can_open() (not very useful and often misused)
  • Document performance considerations for openslide_open()
  • Add properties giving the bounds of the non-empty region of the slide
  • leica: Support multiple main images if their levels are coplanar
  • leica: Use slide size as level size
  • mirax: Support PNG- and BMP-formatted slides
  • mirax: Fix Expected first 0 value error opening some slides
  • mirax: Fix incorrect tile placement on some slides without overlaps
  • mirax: Never synthesize downsampled levels
  • Add OPENSLIDE_DEBUG environment variable (OPENSLIDE_DEBUG=? for help)
  • Fix some crashes in error paths
  • Add tests for many error paths

Version 3.3.3, 2013-04-13

  • Fix inclusion of openslide.h with MSVC
  • Properly handle Aperio JP2K slides with zero-length tiles
  • Support Hamamatsu slides with blank MacroImage key

Version 3.3.2, 2012-12-01

  • Fix seams in MIRAX 2.2 slides (thanks, Agelos Pappas)
  • Fix associated image naming in single-level Aperio slides
  • Stop decoding MIRAX tiles outside requested region
  • Stop decoding unneeded tiles during tile-aligned accesses
  • Increase Hamamatsu VMU tile size to reduce rendering overhead
  • Document performance considerations for openslide_can_open()

Version 3.3.1, 2012-10-14

  • Parallelize concurrent openslide_read_region calls on an openslide_t
  • Eliminate background scanning of tile headers in MIRAX
  • Scan many fewer tiles during first accesses to Hamamatsu VMS
  • Ignore Leica Z-planes other than 0
  • Add experimental tile-size properties
  • Document API thread safety

Version 3.3.0, 2012-09-08

  • Support Leica SCN format (requires libtiff ≥ 4) (thanks, Agelos Pappas)
  • Allow opening MIRAX 2.2 slides (though there are seams, bug #92)
  • Add standardized microns-per-pixel and objective-power properties
  • Add macro associated image in Trestle
  • Rename layer to level throughout the API (deprecate layer functions; remove layer properties)
  • Report parse errors in openslide_open() by returning an openslide_t in error state
  • Deprecate openslide_get_comment()
  • Add openslide_get_version()
  • Improve command-line tools; add manpages
  • Support building with MinGW-w64; drop CMake, MSVC, mingw32
  • Add tests for many error paths

Version 3.2.6, 2012-02-23

  • Support downsampled MIRAX files
  • Improve performance on MIRAX slides without tile overlaps
  • Fix openslide_read_region for large dimensions on layer > 0 (3.2.5 regression)
  • Correct subpixel error in MIRAX tile placement
  • Fix unlikely use-after-free with Hamamatsu VMU

Version 3.2.5, 2011-12-16

  • Support MIRAX 1.03 files (thanks, Jan Harkes)
  • Fix openslide_read_region for large dimensions
  • Use subpixel precision in all backends
  • Don't keep associated images in memory
  • Disable quickhash-1 for TIFF files with very large top layer
  • Various build fixes (thanks, Jan, Marco Feuerstein, and Mathieu Malaterre)
  • Fix some unlikely memory leaks

Version 3.2.4, 2011-03-07

  • Support MIRAX files that do not have non-hierarchical data (thanks, Jan Harkes)
  • Fix compilation on Windows (thanks Hauke Heibel)
  • Work around a bug in GKeyFile parser (thanks, Jan)

Version 3.2.3, 2010-09-09

  • Support MIRAX files that use a variant format for tile positions (thanks, Hauke Heibel and Marco Feuerstein)
  • Update location of website
  • Add background color property, for slides that have it
  • Update CMake scripts and other Windows fixes (thanks Hauke and Marco)
  • Fix some test.c bugs
  • Fix incorrect MIRAX drawing at certain resolutions (thanks Hauke and Marco)
  • Support quickhash-1 on older systems (thanks, Jan Harkes)

Version 3.2.2, 2010-06-16

  • Rework some internals of openslide_read_region
  • Support negative coordinates and zero-sized dimensions in openslide_read_region
  • Clarify the documentation about openslide_read_region
  • Fix Windows build bug with new NGR support
  • Enable untested BigTIFF support

Version 3.2.1, 2010-06-03

  • Fix crashes on Windows when trying to read Hamamatsu files
  • Fix jpeg 7 problems in read_from_one_jpeg
  • Quiet the error handling system after the first error

Version 3.2.0, 2010-06-01

  • Add experimental CMake support and fixes for building with MSVC (thanks to Hauke Heibel!)
  • Enable detecting runtime errors
  • Add initial Hamamatsu Nanozoomer VMU support (thanks to Steve Lamont)
  • Add openslide-write-png tool

Version 3.1.1, 2010-04-27

  • Fix a crash when reading an invalid VMS file
  • Fix memory leaks when reading an invalid VMS file
  • Accept VMS files that have more than one focal plane (non-0 planes ignored)
  • Fix bug that could cause problems with libtiff 4
  • Relax the required version of Microsoft.VC80.CRT

Version 3.1.0, 2010-04-01

  • Enable large file access on Windows (requires Microsoft.VC80.CRT)
  • Support newer Aperio files (compression 33005)
  • Be more robust in reading raw TIFF tiles
  • Reject invalid TIFF files earlier
  • Fix many memory leaks when probing for TIFF files

Version 3.0.3, 2010-03-01

  • Fix nasty artifacts in some MIRAX files (seen at some zoom levels)

Version 3.0.2, 2010-02-17

  • Restore ability to build with glib 2.12, at the expense of not having "quickhash-1" in that configuration

Version 3.0.1, 2010-02-04

  • Fix edge-drawing bug in TIFF backend
  • Ship CHANGELOG.txt

Version 3.0.0, 2010-01-28

  • Switch from GPLv2 to LGPLv2
  • Reduce some unlikely memory leaks
  • Support of more MIRAX files
  • Improve performance of MIRAX rendering, vastly in some cases
  • Reduce appearance of seams in MIRAX
  • Add "quickhash-1" hash property
  • Add openslide-quickhash1sum and openslide-show-properties tools
  • Rework the API documentation
  • Remove never-implemented prefetch functions from openslide.h (but retain with warnings in the library)
  • Start attempting to figure out Trestle tile position files
  • Add some defined property names to the header file

Version 2.3.1, 2009-12-14

  • Eliminate Aperio regression introduced in Version 2.3.0

Version 2.3.0, 2009-12-11

  • Support for generic tiled TIFF format (for InterScope files)
  • Bug fixes
  • Reduction of some TIFF error messages
  • Fixes for some build problems
  • Deprecate prefetch functions (never implemented)

Version 2.2.1, 2009-10-23

  • Fixes for thread safety problems in 2.2.0

Version 2.2.0, 2009-09-15

  • Thread safety (lockless with Hamamatsu and MIRAX files)

Version 2.1.0, 2009-08-18

  • Support for MIRAX mrxs

Version 2.0.0, 2009-07-16

  • Support for image metadata and associated images
  • Support Aperio variant
  • Internally rework a lot in preparation for MIRAX
  • Win32 support

Version 1.1.1, 2009-02-25

  • Remove never-functional generic JPEG 2000 support
  • Switch Aperio to use the released version of OpenJPEG
  • Be more robust to errors in general

Version 1.1.0, 2008-12-20

  • Greatly speed up Hamamatsu with a tile cache and background scanning thread

Version 1.0.0, 2008-12-09

  • Renamed to "OpenSlide"
  • Multi-file Hamamatsu support
  • Switch to 64-bit signed integers in public API where possible

Version 0.5.0, 2008-10-21

  • GPLv2 release
  • Working Aperio support
  • More work on generic JPEG 2000

Version 0.4.2, 2008-09-05

  • Documentation updates
  • For Aperio, remove Jasper in lieu of using OpenJPEG
  • Preliminary and non-functional generic JPEG 2000 support

Version 0.4.0, 2008-03-12

  • Update simple test program

Version 0.3.0, 2008-01-31

  • Broken and unusably slow Aperio support

Version 0.2.0, 2008-01-19

  • Using glib
  • Layers are numbered instead of named
  • Actual start of implementation
  • Initial Trestle support
  • Initial Aperio support (without tile codec)
  • Initial slow and incomplete Hamamatsu support
  • Initial test program
  • Documentation updates

Version 0.1.0, 2007-12-06

  • Unreleased, just documentation and headers (called "Wholeslide")