OSL v1.13.9.0

Release 1.13.9.0 -- 1 May 2024 (compared to 1.13.8.0)

• deps: Support for LLVM-18 #1773 (by مهدي شينون (Mehdi Chinoune) #1803 (by Larry Gritz)
• fix: Make isconnected() work with downstream renderer "connections." #1782 (by sfriedmapixar)
• cleanup: Change OSL_CONSTEXPR14 to constexpr #1805
• internals build: Fix ifdef typo #1804
• build: Propagate cpp version #1797
• build: Print commit hash of locally built dependencies #1798
• ci: Lock down to OIIO 2.5 for icc tests #1799
• ci: Suppress leak sanitizer warnings about internals of robin_hash #1807
• docs: More detail about supported platforms in INSTALL.md #1796

OSL v1.13.8.0

Release 1.13.8.0 -- 1 Apr 2024 (compared to 1.13.7.0)

• fix(batched): Codegen bug for compref with varying index for batched shading #1776 (by Alex Wells)
• fix: Calculatenormal needs fliphandedness #1783 (by sfriedmapixar)
• fix: Print closure missing error message at compile time instead of run time. #1781 (by sfriedmapixar)
• int: Change long-deprecated OIIO macro to new one #1788
• ci: Fix broken Macos-13 CI #1780

OSL v1.13.7.0

Release 1.13.7.0 -- 1 Mar 2024 (compared to 1.13.6.1)

• fix: Mute partio error prints #1774 (by olegul)
• ci: Test with Mac ARM runner #1770
• docs: Fix links to RTD docs from github landing page #1768
• admin: Switch release announcement workflow to jmertic's awesome action #1766

OSL v1.13.6.1

This is the first official supported release of the 1.13 series. The 1.12 series is now considered obsolete and will receive patches only occasionally, and for the most critical fixes.

Release 1.13 -- Feb 1, 2024 (compared to 1.12)

New minimum dependencies and compatibility changes:

• For GPU/OptiX mode, OptiX 6.0 support has been removed. For GPU rendering
  with OptiX, a minimum of OptiX 7.0 is required, and the Cuda minimum has
  been raised to 9.0 #1737
• The minimum version OpenImageIO has been raised from 2.2 to 2.4. #1591 #1722
• The minimum CMake dependency has been raised from 3.12 to 3.15
  #1724 (1.13.5.0)
• The minimum Imath/OpenEXR has been raised from 2.3 to 2.4. (Note: OSL 1.13
  is probably the last major release family that will support Imath/OpenEXR
  2.x.)

OSL Language and oslc compiler:

• There have been no substantive changes to the OSL language in this release.

⛰️ API changes, new options, new ShadingSystem features (for renderer writers):

• A new shadingStateUniform pointer field was added to ShaderGlobals for
  planned future expansion and improved GPU support. #1585 (1.13.1.0)
• Adding relaxed type-equivalency to ReParameter() #1639 (by cmstein) (1.13.2.1)
• Expose llvm groupdata size as a shadergroup attribute
  #1642 (by Chris Hellmuth) (1.13.4.0)
• RendererServices API for letting get_texture_handle consider colorspace
  #1641 (1.13.4.0)
• Make "compile_report" attribute an int instead of just 0/1. Passing 1 makes
  a brief report, values >1 are more verbose. (Zero still prints no report.)
  #1654 (1.13.4.0)
• Switch lockgeom to interpolated and interactive. The lockgeom=0
  was confusing. Now we use interpolated=1 to mean "don't optimize it away
  because it might be interpolated across the geometry and thus won't have
  the same value at all points being shaded," and the subtly different
  interactive=1 to mean "don't optimize it away because although it will
  always take on the same value at all points at the same time, the user
  might want to interactively adjust the value and we don't want to have
  to recompile the shader group if that happens."
  #1662 (1.13.4.0)
• Add type information for needed attributes. #1650 (by Curtis Black) (1.13.4.0)
• Add API for building attribute getter free functions.
  #1704 (by Curtis Black) (1.13.5.0)
• Rs fmt specification - Journaling Algorithm for error, warning, fprintf
  #1702 (by Steena Monteiro) #1711 #1715 (1.13.5.0)

🚀 SIMD batched shading mode

• Fix some array overruns (asymptomatic, but still potentially buggy) in
  common_ancestor_between. #1577 (1.13.0.2)
• Fix issue with closure keyword parameters. #1620 (1.13.2.0/1.12.8.0)
• Fix crash when adding a default initialized closure. #1624
  (1.13.2.0/1.12.8.0)
• Fix support for closures with array types. #1630 (1.13.2.0/1.12.8.0)
• Fix bug with masked wide llvm_gen_closure() #1637 (by danieldresser-ie) (1.13.2.1)
• Fix Force LLVM Boolean #1717 (by Alex Wells)
• Batched pointcloud if "index" is not passed #1753 (by Alex Wells)

🚀 OptiX GPU rendering

• OptiX 6.0 support has been removed. For GPU rendering with OptiX, a minimum
  of OptiX 7.0 is required.
• Big overhaul/simplification of how strings are represented on the GPU: the
  extra level of indirection to global variables is removed, and strings are
  simply represented in ordinary variables as the hash of their characters.
  #1531 (1.13.0.0) #1553 (1.13.0.1)
• Better PTX cache hit rate by eliminating several sources of not being
  strictly deterministic in the PTX text we were generating. #1566 #1570
  (1.13.0.1)
• Fix PTX symbol visibility issues. #1609 (1.13.2.0)
• Hide more code that is only used for OptiX mode, when OptiX is disabled.
  #1608 (1.13.2.0)
• Remove dependency on OptiX SDK for building core OSL with OptiX support. You
  can now build OSL with OptiX support enabled even if you don't have the
  OptiX SDK headers present at build time. But you will still need them to
  build your OptiX-based application that uses OSL for GPU rendering. #1627
  (1.13.2.0/1.12.8.0)
• GPU/OptiX support of ReParameter #1686 (1.13.4.0)
• Fix userdata derivatives for interpolated params on GPU #1685 (by Pascal Lecocq) (1.13.4.0)
• Enable userdata derivatives for interpolated params on GPU
  #1657 (by Chris Hellmuth) (1.13.4.0)
• Move qualifying GroupData params onto stack for higher performance.
  #1710 (by Chris Hellmuth) (1.13.5.0)
• Handle mixed string casting that plagues optix codegen #1718 (1.13.5.0)
• Add missing members to ShaderGlobals in rend_lib.h #1721 (by Tim Grant) (1.13.5.0)
• OptiX direct callable API that owns groupdata buffer
  #1683 (by Chris Hellmuth) (1.13.5.0)
• OptiX PTX pipeline overhaul #1680 (by Tim Grant) (1.13.5.0)
• Perf: Don't insert redundant run layer calls inside a basic block
  #1665 #1669 #1672 (by Chris Hellmuth) (1.13.4.0)
• Fix NVPTX TargetMachine leak, etc. #1763 (by Tim Grant)

🐛/🔧 Internals: fixes, improvements, and developer concerns

• Fix memory leak in oslc ASTvariable_declaration. #1576 (1.13.0.2)
• Fix memory leaks in LPE code in error conditions. #1593 #1594 (1.13.0.3)
• Fix mismatched strides when calling OCIO for transformc with derivs #1646 (1.13.4.0)
• Set up ray types for testrender #1648 (1.13.4.0)
• Fix userdata binding corner case #1673 (by Alejandro Conty) (1.13.4.0)
• Fix constant float values being converted to ints #1674 (by Declan Russell) (1.13.4.0)
• Don't try to ReParameter symbols not in the group #1693 (by Alejandro Conty) (1.13.5.0)
• Have ReParameter only copy data when it changes #1698 (1.13.5.0)
• Avoid deprecated OSLQuery ctr in test example #1699 (1.13.5.0)
• Zero derivs for interactive params when needed #1700 (by Alejandro Conty) (1.13.5.0)
• oslc bug fix: shader params whose default values involve "init ops" could be
  incorrectly initialized if their values came from instance parameters set to
  zero. #1578 (1.13.0.2)
• oslc: Add missing fmod() variants #1643 (1.13.4.0)
• Simple constant folding of binary expressions now happen on the oslc side
  #1653 (1.13.4.0)
• platform.h:
  • New OSL_ALLOCA macro to allocate on the stack. #1589 (1.13.0.3)
  • Define OSL::bitcast utility. #1610 (1.13.2.0)
• Make sure that std::hash is defined for ustring and ustringhash. #1599
  (1.13.1.1)
• Deprecate LLVMUtil::internalize_module_functions. #1606 (1.13.1.0)
• Work toward always representing strings in shaders as ustringhash rather
  than ustring: phase 1 #1603 phase2 #1612 (1.13.2.0) #1726 (1.13.5.0)
• Remove unnecessary setting of locale::global #1636 (by danieldresser-ie) (1.13.2.1)
• Fully define bitcast template [#1635](https://github.com/AcademySo...

OSL v1.13.6.0 BETA 1

This is the first beta release of OSL 1.13. We are shooting for January 15 for an official production-ready 1.13 release. Please test and let us know if there are any problems. Once out of beta, this will be the officially supported stable release for 2024.

If all goes well, there will be no additional non-back-compatible changes, but it's possible for this to happen until the "beta" designation is removed, so use some caution. Preliminary release notes are below:

Release 1.13 -- beta 1: December 20, 2023 (compared to 1.12)

New minimum dependencies and compatibility changes:

• For GPU/OptiX mode, OptiX 6.0 support has been removed. For GPU rendering
  with OptiX, a minimum of OptiX 7.0 is required, and the Cuda minimum has
  been raised to 9.0 #1737
• The minimum version OpenImageIO has been raised from 2.2 to 2.4. #1591 #1722
• The minimum CMake dependency has been raised from 3.12 to 3.15
  #1724 (1.13.5.0)
• The minimum Imath/OpenEXR has been raised from 2.3 to 2.4. (Note: OSL 1.13
  is probably the last major release family that will support Imath/OpenEXR
  2.x.)

OSL Language and oslc compiler:

• There have been no substantive changes to the OSL language in this release.

⛰️ API changes, new options, new ShadingSystem features (for renderer writers):

• A new shadingStateUniform pointer field was added to ShaderGlobals for
  planned future expansion and improved GPU support. #1585 (1.13.1.0)
• Adding relaxed type-equivalency to ReParameter() #1639 (by cmstein) (1.13.2.1)
• Expose llvm groupdata size as a shadergroup attribute
  #1642 (by Chris Hellmuth) (1.13.4.0)
• RendererServices API for letting get_texture_handle consider colorspace
  #1641 (1.13.4.0)
• Make "compile_report" attribute an int instead of just 0/1. Passing 1 makes
  a brief report, values >1 are more verbose. (Zero still prints no report.)
  #1654 (1.13.4.0)
• Switch lockgeom to interpolated and interactive. The lockgeom=0
  was confusing. Now we use interpolated=1 to mean "don't optimize it away
  because it might be interpolated across the geometry and thus won't have
  the same value at all points being shaded," and the subtly different
  interactive=1 to mean "don't optimize it away because although it will
  always take on the same value at all points at the same time, the user
  might want to interactively adjust the value and we don't want to have
  to recompile the shader group if that happens."
  #1662 (1.13.4.0)
• Add type information for needed attributes. #1650 (by Curtis Black) (1.13.4.0)
• Add API for building attribute getter free functions.
  #1704 (by Curtis Black) (1.13.5.0)
• Rs fmt specification - Journaling Algorithm for error, warning, fprintf
  #1702 (by Steena Monteiro) #1711 #1715 (1.13.5.0)

🚀 SIMD batched shading mode

• Fix some array overruns (asymptomatic, but still potentially buggy) in
  common_ancestor_between. #1577 (1.13.0.2)
• Fix issue with closure keyword parameters. #1620 (1.13.2.0/1.12.8.0)
• Fix crash when adding a default initialized closure. #1624
  (1.13.2.0/1.12.8.0)
• Fix support for closures with array types. #1630 (1.13.2.0/1.12.8.0)
• Fix bug with masked wide llvm_gen_closure() #1637 (by danieldresser-ie) (1.13.2.1)
• Fix Force LLVM Boolean #1717 (by Alex Wells)
• Batched pointcloud if "index" is not passed #1753 (by Alex Wells)

🚀 OptiX GPU rendering

• OptiX 6.0 support has been removed. For GPU rendering with OptiX, a minimum
  of OptiX 7.0 is required.
• Big overhaul/simplification of how strings are represented on the GPU: the
  extra level of indirection to global variables is removed, and strings are
  simply represented in ordinary variables as the hash of their characters.
  #1531 (1.13.0.0) #1553 (1.13.0.1)
• Better PTX cache hit rate by eliminating several sources of not being
  strictly deterministic in the PTX text we were generating. #1566 #1570
  (1.13.0.1)
• Fix PTX symbol visibility issues. #1609 (1.13.2.0)
• Hide more code that is only used for OptiX mode, when OptiX is disabled.
  #1608 (1.13.2.0)
• Remove dependency on OptiX SDK for building core OSL with OptiX support. You
  can now build OSL with OptiX support enabled even if you don't have the
  OptiX SDK headers present at build time. But you will still need them to
  build your OptiX-based application that uses OSL for GPU rendering. #1627
  (1.13.2.0/1.12.8.0)
• GPU/OptiX support of ReParameter #1686 (1.13.4.0)
• Fix userdata derivatives for interpolated params on GPU #1685 (by Pascal Lecocq) (1.13.4.0)
• Enable userdata derivatives for interpolated params on GPU
  #1657 (by Chris Hellmuth) (1.13.4.0)
• Move qualifying GroupData params onto stack for higher performance.
  #1710 (by Chris Hellmuth) (1.13.5.0)
• Handle mixed string casting that plagues optix codegen #1718 (1.13.5.0)
• Add missing members to ShaderGlobals in rend_lib.h #1721 (by Tim Grant) (1.13.5.0)
• OptiX direct callable API that owns groupdata buffer
  #1683 (by Chris Hellmuth) (1.13.5.0)
• OptiX PTX pipeline overhaul #1680 (by Tim Grant) (1.13.5.0)
• Perf: Don't insert redundant run layer calls inside a basic block
  #1665 #1669 #1672 (by Chris Hellmuth) (1.13.4.0)

🐛/🔧 Internals: fixes, improvements, and developer concerns

• Fix memory leak in oslc ASTvariable_declaration. #1576 (1.13.0.2)
• Fix memory leaks in LPE code in error conditions. #1593 #1594 (1.13.0.3)
• Fix mismatched strides when calling OCIO for transformc with derivs #1646 (1.13.4.0)
• Set up ray types for testrender #1648 (1.13.4.0)
• Fix userdata binding corner case #1673 (by Alejandro Conty) (1.13.4.0)
• Fix constant float values being converted to ints #1674 (by Declan Russell) (1.13.4.0)
• Don't try to ReParameter symbols not in the group #1693 (by Alejandro Conty) (1.13.5.0)
• Have ReParameter only copy data when it changes #1698 (1.13.5.0)
• Avoid deprecated OSLQuery ctr in test example #1699 (1.13.5.0)
• Zero derivs for interactive params when needed #1700 (by Alejandro Conty) (1.13.5.0)
• oslc bug fix: shader params whose default values involve "init ops" could be
  incorrectly initialized if their values came from instance parameters set to
  zero. #1578 (1.13.0.2)
• oslc: Add missing fmod() variants #1643 (1.13.4.0)
• Simple constant folding of binary expressions now happen on the oslc side
  #1653 (1.13.4.0)
• platform.h:
  • New OSL_ALLOCA macro to allocate on the stack. #1589 (1.13.0.3)
  • Define OSL::bitcast utility. #1610 (1.13.2.0)
• Make sure that std::hash is defined for ustring and ustringhash. #1599
  (1.13.1.1)
• Deprecate LLVMUtil::internalize_module_functions. #1606 (1.13.1.0)
• Work toward always representing strings in shaders as ustringhash rather
  than ustring: phase 1 #1603 phase2 #1612 (1.13.2.0) #1726 (1.13.5.0)
• Remove unnecessary setting of local...

OSL v1.12.14.0

Release 1.12.14.0 -- 1 Nov 2023 (compared to 1.12.13.0)

• Correctly document that our Cuda minimum is 9.0. #1737
• Fixes to build and test against OpenImageIO 2.5 #1742
• Fix default fmt logic changing in latest openimageio release #1725

OSL v1.12.13.0

Release 1.12.13.0 -- 1 July 2023 (compared to 1.12.12.0)

• fix: Fix constant float values being converted to ints #1674 (by Declan Russell)
• build Fix builds when USE_PYTHON=OFF #1675 (by Declan Russell)
• build Changes to support fmt 10.0 #1691
• cleanup Switch deprecated oiio simd names to modern #1679
• testing: Avoid deprecated OSLQuery ctr in test example #1699
• ci: Fix package name for icc #1690
• ci: Add VFX Platform 2023 tests using new ASWF containers #1696
• ci: Switch oiio obsolete branch names to immutable tags #1701
• docs Improve documentation of trace function #1671 (by AidanWelch)
• docs README.md: added filmography and Siggraph OSL course info. #1692 #1694 (by Mitch Prater)
• docs Amend the filmography #1695
• docs Fix incorrect links in CONTRIBUTING #1688

OSL v1.12.12.0

Release 1.12.12.0 -- 1 May 2023 (compared to 1.12.11.0)

• New ShadingSystem getattribute query for shader groups: "attribute_types"
  retrieves a pointer to the array of TypeDesc values describing the
  attributes retrieved by existing "attributes_needed" and "attribute_scopes".
  #1650
• Fix a bug with binding userdata when it's used by more than one shader
  within the group and they disagree about whether derivatives are needed when
  retrieving the attribute. #1673

OSL v1.12.11.0

Release 1.12.11.0 -- 5 Apr 2023 (compared to 1.12.10.0)

• Build: Add Qt 6.x compatibility (Qt is only used for osltoy). #1655
• Build: more careful about paths to look for LLVM. #1656
• Build: Fix Cuda compilation flags for LLVM 15. #1659
• Notice: OSL does not yet build properly against the newly release LLVM 16.
  You must use LLVM 9-15. For Mac users who get their llvm from Homebrew,
  please be aware that Homebrew has changed its default llvm to 16, so you'll
  need to brew install llvm@14 and make your OSL CMake define:
  -DLLVM_ROOT=/usr/local/opt/llvm@14

OSL v1.12.10.0

Release 1.12.10.0 -- 1 Mar 2023 (compared to 1.12.9.0)

• feat(testrender): Modify testrender so that it correctly sets raytype to
  "camera" for camera rays, "shadow" for shadow rays, and "diffuse" for all
  secondary rays. Also rerun the shades for background shader group on the
  camera rays rather than use the cached map. This helps the MaterialX project
  use testrender for certain unit tests and verification. #1648 #1649
• feat: Expose llvm groupdata size as a shadergroup attribute
  "llvm_groupdata_size". #1642
• fix: Crash could result from uncaught exception in OpenColorIO when calling
  transformc with derivatives for color spaces that require OCIO. #1646
• fix: certain uses of fmod() in shaders could fail to generate LLVM code
  correctly, due to a missing implementation for the fmod(triple,float)
  varieties. #1643
• build: Change snprintf formatting to satisfy some compilers. #1640
• CI: Fix broken Mac ci. #1647