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Edit: CHANGELOG.txt
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")