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# Imath Release Notes * [Version 3.1.2](#version-312-july-31-2021) July 31, 2021 * [Version 3.1.1](#version-311-july-20-2021) July 20, 2021 * [Version 3.1.0](#version-310-july-13-2021) July 13, 2021 * [Version 3.0.5](#version-305-june-29-2021) June 29, 2021 * [Version 3.0.4](#version-304-june-1-2021) June 1, 2021 * [Version 3.0.2](#version-302-may-16-2021) May 16, 2021 * [Version 3.0.1](#version-301-april-1-2021) April 1, 2021 * [Version 3.0.1-beta](#version-301-beta-march-28-2021) March 28, 2021 * [Version 3.0.0-beta](#version-300-beta-march-15-2021) March 15, 2021 * [Inherited History from OpenEXR](#inherited-history-from-openexr) ## Version 3.1.2 (July 31, 2021) Patch release that fixes a Windows header issue. * \[[#190](https://github.com/AcademySoftwareFoundation/Imath/pull/190)\] Improve handling of ``#include <*intrin.h>`` ## Version 3.1.1 (July 20, 2021) Patch release that fixes a build failure on ARM64 macOS * \[[#184](https://github.com/AcademySoftwareFoundation/Imath/pull/184)\] Include ``<x86intrin.h>`` only if ``__x86_64__`` ## Version 3.1.0 (July 13, 2021) Minor release with new features: * Optimized half-to-float and float-to-half conversion, using F16C SSE instruction set if available. Non-SSE conversion eliminates the float-to-half exponent lookup table, and half-to-float conversion provides a compile-time-optional bit shifting that is slower but eliminates the need for the lookup table, for applications where memory is limited. Half-to-float and float-to-half conversion is also available as C-language functions ``imath_half_to_float()`` and ``imath_float_to_half()``. All new conversions produced identical results, and new options are off by default to ensure backwards compatibility. See https://imath.readthedocs.io for more info. * NOEXCEPT specifier can be eliminated at compile-time via the ``IMATH_USE_NOEXCEPT`` CMake option. * Python bindings: * FixedArray objects support a "read only" state. * FixedArray objects support python buffer protocol. * Optimized 4x4 matrix multiplication. ### Merged Pull Requests * [#181](https://github.com/AcademySoftwareFoundation/Imath/pull/181)] Clean up half lookup-table options and related docs * [#179](https://github.com/AcademySoftwareFoundation/Imath/pull/179)] Remove dead code from half * [#178](https://github.com/AcademySoftwareFoundation/Imath/pull/178)] Update Imath docs for 3.1 * [#177](https://github.com/AcademySoftwareFoundation/Imath/pull/177)] v3.1.0 release notes * [#176](https://github.com/AcademySoftwareFoundation/Imath/pull/176)] v3.0.5 notes * [#175](https://github.com/AcademySoftwareFoundation/Imath/pull/175)] Clean up library VERSION and SOVERSION * [#172](https://github.com/AcademySoftwareFoundation/Imath/pull/172)] Use CMAKE_INSTALL_FULL_LIBDIR/INCLUDEDIR for pkgconfig * [#173](https://github.com/AcademySoftwareFoundation/Imath/pull/173)] Update README.md and INSTALL.md for 3.1 * [#169](https://github.com/AcademySoftwareFoundation/Imath/pull/169)] Add testInterop to test list in define_imath_test() * [#168](https://github.com/AcademySoftwareFoundation/Imath/pull/168)] Push/pop Windows warning pragma * [#167](https://github.com/AcademySoftwareFoundation/Imath/pull/167)] Clean up cmake lib symlink message * [#165](https://github.com/AcademySoftwareFoundation/Imath/pull/165)] Use CMAKE_<CONFIG>_POSTFIX for .pc file lib suffix. * [#166](https://github.com/AcademySoftwareFoundation/Imath/pull/166)] Fix non-versioned library symlinks in debug build. * [#162](https://github.com/AcademySoftwareFoundation/Imath/pull/162)] silence a few warnings noticed with -Weverything * [#157](https://github.com/AcademySoftwareFoundation/Imath/pull/157)] IMATH_NOEXCEPT macro to make noexcept a compile-time option * [#156](https://github.com/AcademySoftwareFoundation/Imath/pull/156)] PyImath read-only FixedArray state & python buffer protocol support * [#158](https://github.com/AcademySoftwareFoundation/Imath/pull/158)] Improve 4x4 matrix multiplication * [#160](https://github.com/AcademySoftwareFoundation/Imath/pull/160)] Clean up analysis_workflow.yml * [#155](https://github.com/AcademySoftwareFoundation/Imath/pull/155)] Release notes for v3.0.4 * [#159](https://github.com/AcademySoftwareFoundation/Imath/pull/159)] Add new macros to Doxyfile PREDEFINED * [#153](https://github.com/AcademySoftwareFoundation/Imath/pull/153)] Configure ImathTest as optional standalone program * [#141](https://github.com/AcademySoftwareFoundation/Imath/pull/141)] Enable C and lighter weight half <-> float conversion * [#150](https://github.com/AcademySoftwareFoundation/Imath/pull/150)] Add __version__ attr to imath and imathnumpy python modules ## Version 3.0.5 (June 29, 2021) Patch release that fixes problems with library symlinks and pkg-config. Otherwise, no code changes. * [#172](https://github.com/AcademySoftwareFoundation/Imath/pull/172)] Use CMAKE_INSTALL_FULL_LIBDIR/INCLUDEDIR for pkgconfig * [#166](https://github.com/AcademySoftwareFoundation/Imath/pull/166)] Fix non-versioned library symlinks in debug build. * [#165](https://github.com/AcademySoftwareFoundation/Imath/pull/165)] Use CMAKE_<CONFIG>_POSTFIX for .pc file lib suffix. ## Version 3.0.4 (June 1, 2021) Patch release that corrects a problem with the release version number of v3.0.2: * \[[#147](https://github.com/AcademySoftwareFoundation/Imath/pull/147)\] Add #define for IMATH_VERSION_RELEASE_TYPE * \[[#145](https://github.com/AcademySoftwareFoundation/Imath/pull/145)\] Set IMATH_VERSION from Imath_VERSION instead of CMAKE_PROJECT_VERSION ## Version 3.0.2 (May 16, 2021) Patch release with miscellaneous bug/build fixes: * \[[#142](https://github.com/AcademySoftwareFoundation/Imath/pull/142)\] Fix order of ${IMATH_SOVERSION}.${IMATH_SOREVISION}.${IMATH_SOAGE} * \[[#140](https://github.com/AcademySoftwareFoundation/Imath/pull/140)\] Fix regression in succf()/predf() * \[[#139](https://github.com/AcademySoftwareFoundation/Imath/pull/139)\] Clean up setting of Imath version * \[[#137](https://github.com/AcademySoftwareFoundation/Imath/pull/137)\] Don't impose C++14 on downstream projects * \[[#135](https://github.com/AcademySoftwareFoundation/Imath/pull/135)\] Add section on python bindings * \[[#133](https://github.com/AcademySoftwareFoundation/Imath/pull/133)\] Lib version ## Version 3.0.1 (April 1, 2021) First release of Imath independent of OpenEXR. See the [porting guide](docs/PortingGuide2-3.md) for details about differences from previous releases. Summary: * Imath includes the half type, formerly in a separate Half library. * Headers are installed in ``Imath/`` subdirectory. * All appropriate methods are marked constexpr, noexcept * Appropriate declaration include CUDA ``__host__`` and ``__device__`` directives. * Throwing methods throw std exceptions instead of ``Iex``. * New Vec and Matrix interoperability constructors for conversion from other similar type objects. * Symbol linkage visibility is limited to specific public symbols. * python bindings are off by default, available by setting ``PYTHON=ON``. * Deprecated features: - ``std::numeric_limits`` replaces ``Imath::limits``. - ``Int64`` and ``SInt64`` are deprecated in favor of ``uint64_t`` and ``int64_t``. ## Version 3.0.1-beta (March 28, 2021) Beta patch release: * \[[#131](https://github.com/AcademySoftwareFoundation/Imath/pull/131)\] #if IMATH_FOREIGN_VECTOR_INTEROP around type detectors * \[[#130](https://github.com/AcademySoftwareFoundation/Imath/pull/130)\] Forward declarations only if header is not included ## Version 3.0.0-beta (March 15, 2021) First release of Imath independent of OpenEXR. See the [porting guide](docs/PortingGuide2-3.md) for details about differences from previous releases. Summary and Key Changes: * Imath includes the half type, formerly in a separate Half library. * Headers are installed in ``Imath/`` subdirectory. * Header files have been pruned of extraneous ``#include``'s, which may require updates to application source code. * All appropriate methods are marked constexpr, noexcept * Appropriate declaration include CUDA ``__host__`` and ``__device__`` directives. * Throwing methods throw std exceptions instead of ``Iex``. * New Vec and Matrix interoperability constructors for conversion from other similar type objects. * Symbol linkage visibility is limited to specific public symbols. * Python bindings are off by default, available by setting ``PYTHON=ON``. * Deprecated features: - ``std::numeric_limits`` replaces ``Imath::limits``. - ``Int64`` and ``SInt64`` are deprecated in favor of ``uint64_t`` and ``int64_t``. ### Merged Pull Requests * \[[#119](https://github.com/AcademySoftwareFoundation/Imath/pull/119)\] Enable policy 77 if possible. * \[[#117](https://github.com/AcademySoftwareFoundation/Imath/pull/117)\] Add/fix rst source for readthedocs * \[[#116](https://github.com/AcademySoftwareFoundation/Imath/pull/116)\] Add/fix doxygen comments * \[[#115](https://github.com/AcademySoftwareFoundation/Imath/pull/115)\] Add =delete for the int64_t Vec specializations * \[[#114](https://github.com/AcademySoftwareFoundation/Imath/pull/114)\] Disable analysis on PR/push * \[[#113](https://github.com/AcademySoftwareFoundation/Imath/pull/113)\] Clean up cmake/config * \[[#111](https://github.com/AcademySoftwareFoundation/Imath/pull/111)\] Rename IMATH_IMATH_NAMESPACE option to IMATH_NAMESPACE * \[[#110](https://github.com/AcademySoftwareFoundation/Imath/pull/110)\] Remove PyImathConfigInternal * \[[#109](https://github.com/AcademySoftwareFoundation/Imath/pull/109)\] build one python binding only * \[[#107](https://github.com/AcademySoftwareFoundation/Imath/pull/107)\] Add int64_t specializations of Vec and Box. * \[[#106](https://github.com/AcademySoftwareFoundation/Imath/pull/106)\] Replace Int64/SInt64 with uint64_t/int64_t * \[[#103](https://github.com/AcademySoftwareFoundation/Imath/pull/103)\] Drop support for exception-handling in PyImath * \[[#102](https://github.com/AcademySoftwareFoundation/Imath/pull/102)\] cmake improvements and fixes * \[[#100](https://github.com/AcademySoftwareFoundation/Imath/pull/100)\] Replace Iex::OverflowExc with std::invalid_argument * \[[#98](https://github.com/AcademySoftwareFoundation/Imath/pull/98)\] constexpr Vec2, Vec3, Vec4 constructors * \[[#97](https://github.com/AcademySoftwareFoundation/Imath/pull/97)\] restore original behavior of Matrix33<T>::setScale() * \[[#95](https://github.com/AcademySoftwareFoundation/Imath/pull/95)\] Build fixups for Visual Studio 2015 * \[[#94](https://github.com/AcademySoftwareFoundation/Imath/pull/94)\] Add background and file/class-specific details to porting guide * \[[#93](https://github.com/AcademySoftwareFoundation/Imath/pull/93)\] Fix typo in comment in testHalfLimits * \[[#92](https://github.com/AcademySoftwareFoundation/Imath/pull/92)\] Replace ILMBASE_HAVE_LARGE_STACK with IMATH_HAVE_LARGE_STACK * \[[#91](https://github.com/AcademySoftwareFoundation/Imath/pull/91)\] Interoperability constructors * \[[#90](https://github.com/AcademySoftwareFoundation/Imath/pull/90)\] Fix compiler errors from recent changes * \[[#89](https://github.com/AcademySoftwareFoundation/Imath/pull/89)\] First stab at Imath 2->3 porting guide * \[[#88](https://github.com/AcademySoftwareFoundation/Imath/pull/88)\] PyImath installs headers into Imath subdirectory * \[[#87](https://github.com/AcademySoftwareFoundation/Imath/pull/87)\] constexpr as much of half as possible * \[[#83](https://github.com/AcademySoftwareFoundation/Imath/pull/83)\] Replace NOTICE with STATUS for CMake messages * \[[#82](https://github.com/AcademySoftwareFoundation/Imath/pull/82)\] Clean up Imath::Limits and numeric_limits issues * \[[#81](https://github.com/AcademySoftwareFoundation/Imath/pull/81)\] Reformat all Imath header comments to doxygen style * \[[#77](https://github.com/AcademySoftwareFoundation/Imath/pull/77)\] Change copyright notices to standard SPDX format * \[[#76](https://github.com/AcademySoftwareFoundation/Imath/pull/76)\] Incorrect constexpr in Imath::limits<half>, and missing test. * \[[#75](https://github.com/AcademySoftwareFoundation/Imath/pull/75)\] CI: add VFX2021 jobs, enable coverage analysis * \[[#74](https://github.com/AcademySoftwareFoundation/Imath/pull/74)\] noexcept all the things * \[[#73](https://github.com/AcademySoftwareFoundation/Imath/pull/73)\] Simplify definition of IMATH_RESTRICT for modern supported compilers * \[[#72](https://github.com/AcademySoftwareFoundation/Imath/pull/72)\] Eliminate normalize and length methods for Vec<inttype> * \[[#70](https://github.com/AcademySoftwareFoundation/Imath/pull/70)\] Adding missing header * \[[#69](https://github.com/AcademySoftwareFoundation/Imath/pull/69)\] [#bugfix] Install error on windows #68 * \[[#67](https://github.com/AcademySoftwareFoundation/Imath/pull/67)\] Fix two typos in m22 tests causing out of bounds references * \[[#66](https://github.com/AcademySoftwareFoundation/Imath/pull/66)\] Use likely/unlikely to improve certain vector ops * \[[#65](https://github.com/AcademySoftwareFoundation/Imath/pull/65)\] Deprecate Math<T> in favor of std:: * \[[#60](https://github.com/AcademySoftwareFoundation/Imath/pull/60)\] Make Matrix implementation more SIMD friendly * \[[#59](https://github.com/AcademySoftwareFoundation/Imath/pull/59)\] Imath::Vec -- omit exception-throwing methods from Cuda side * \[[#58](https://github.com/AcademySoftwareFoundation/Imath/pull/58)\] Make separate test calls for each test * \[[#57](https://github.com/AcademySoftwareFoundation/Imath/pull/57)\] Fixes the subproject test * \[[#56](https://github.com/AcademySoftwareFoundation/Imath/pull/56)\] Initial support for C wrappers * \[[#55](https://github.com/AcademySoftwareFoundation/Imath/pull/55)\] Fix non-linux platform CI * \[[#54](https://github.com/AcademySoftwareFoundation/Imath/pull/54)\] Combination of Half/Imath and HalfTest/ImathTest directories. * \[[#53](https://github.com/AcademySoftwareFoundation/Imath/pull/53)\] Stoped sonar cloud from running on PR * \[[#52](https://github.com/AcademySoftwareFoundation/Imath/pull/52)\] Fix problems with ImathInterval, and add test * \[[#51](https://github.com/AcademySoftwareFoundation/Imath/pull/51)\] First pass at sphinx/breathe/doxygen documentation * \[[#50](https://github.com/AcademySoftwareFoundation/Imath/pull/50)\] Removed all references to PYIMATH_VERSION, as it is redundant. * \[[#48](https://github.com/AcademySoftwareFoundation/Imath/pull/48)\] Set version to 3.0.0 and SOCURRENT to 26 * \[[#47](https://github.com/AcademySoftwareFoundation/Imath/pull/47)\] Added Exc variants of all methods in frustum that required them. * \[[#46](https://github.com/AcademySoftwareFoundation/Imath/pull/46)\] Movement of all source directories into one top level src/ * \[[#44](https://github.com/AcademySoftwareFoundation/Imath/pull/44)\] Fix copy/paste typos in Doxyfile and conf.py * \[[#43](https://github.com/AcademySoftwareFoundation/Imath/pull/43)\] Initial Doxygen/sphinx/breathe/readthedocs configuration * \[[#42](https://github.com/AcademySoftwareFoundation/Imath/pull/42)\] Made various Imath/ header methods inline * \[[#41](https://github.com/AcademySoftwareFoundation/Imath/pull/41)\] __host__ __device__ CUDA macro added to all header functions under Imath/ * \[[#40](https://github.com/AcademySoftwareFoundation/Imath/pull/40)\] Update INSTALL info on namespaces and cmake options * \[[#39](https://github.com/AcademySoftwareFoundation/Imath/pull/39)\] Clean up of repo docs. * \[[#38](https://github.com/AcademySoftwareFoundation/Imath/pull/38)\] Added CUDA __host__ __device__ with macro to Vector, Matrix, Limits, \xe2\x80\xa6 * \[[#37](https://github.com/AcademySoftwareFoundation/Imath/pull/37)\] Add .git-blame-ignore-revs to ignore reformatting * \[[#36](https://github.com/AcademySoftwareFoundation/Imath/pull/36)\] Disable clang-format for python bindings * \[[#32](https://github.com/AcademySoftwareFoundation/Imath/pull/32)\] Tune .clang-format to match existing style * \[[#30](https://github.com/AcademySoftwareFoundation/Imath/pull/30)\] Changed analysis sonarcloud tests, run on pull request. * \[[#29](https://github.com/AcademySoftwareFoundation/Imath/pull/29)\] Added CI testing and made necessary changes to pass those tests. * \[[#27](https://github.com/AcademySoftwareFoundation/Imath/pull/27)\] Simplest CUDA half type conflict resolution implementation. * \[[#25](https://github.com/AcademySoftwareFoundation/Imath/pull/25)\] Used macros to allow compilation with C++11 and constexpr * \[[#24](https://github.com/AcademySoftwareFoundation/Imath/pull/24)\] b"removed pragma to disable clang's -Wself-assign-overloaded" * \[[#23](https://github.com/AcademySoftwareFoundation/Imath/pull/23)\] changed assert()\] to throw, which is what the original Iex macro ASSERT()\] macro did * \[[#21](https://github.com/AcademySoftwareFoundation/Imath/pull/21)\] First pass at adding constexpr where useful * \[[#20](https://github.com/AcademySoftwareFoundation/Imath/pull/20)\] Speedtest and Inversion python bindings for Arrays * \[[#19](https://github.com/AcademySoftwareFoundation/Imath/pull/19)\] clean up Imath repo docs * \[[#18](https://github.com/AcademySoftwareFoundation/Imath/pull/18)\] Transfer of PyImath history and source to Imath * \[[#17](https://github.com/AcademySoftwareFoundation/Imath/pull/17)\] fixed typo in README.md * \[[#15](https://github.com/AcademySoftwareFoundation/Imath/pull/15)\] further edits of README.md * \[[#14](https://github.com/AcademySoftwareFoundation/Imath/pull/14)\] First complete draft of README.md for the Imath project ## Inherited History from OpenEXR History dated before May 9th, 2020 has been inherited from https://github.com/AcademySoftwareFoundation/openexr, omitting commits (via [git-filter-repo](https://github.com/newren/git-filter-repo)) not pertaining to files now a part of the Imath project.