TSC meeting notes 2019-07-16

Signed-off-by: Cary Phillips <cary@ilm.com>

ASWF/tsc-meetings/2020-07-16.md

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+# 7/16/2020
+
+### Attending:
+
+* Cary Phillips
+* Christina Tempelaar-Lietz
+* Joseph Goldstone
+* Kimball Thurston
+* Larry Gritz
+* Nick Porcino
+* Owen Thompson
+* Peter Hillman
+* Rod Bogart
+
+### Discussion:
+
+* The CLA. Disney refuses to sign the current one, although Disney
+  employees already authorized have apparently somehow slipped
+  through. This came to a head with OSL. We (OpenEXR TSC) have no
+  concerns about moving to the new CLA that the ASWF Governing Board
+  legal committee settled on, which is Apache 2. We will request help
+  from John Mertic to navigate through changing the forms in EasyCLA,
+  and getting respetive companies to sign the new one, without anyone
+  getting locked out of push access to the repo. Also, we need to
+  update the documents in repo and make sure there are no references
+  to the outdated form. Cary will request help from John Mertic.
+
+* Review the logo concepts from Ali Rowan, graphic designer with the
+  Linux Foundation. The red version is nicely suggestive of the old
+  logo. The trapezoidal shapes were intended to suggest a perspective
+  projection, although the shape in the concept designs provided is
+  not a perspective, and this feature has relatively minor appeal to
+  the group. Therefore, we settle on the square-ish red logo. Note
+  that we need several variations: text on the bottom, text to the
+  right, no text, gray-scale, very small "favicon". Cary will request
+  that of Ali.
+
+
+* Open Source Day
+
+  * Outline:
+
+    * Brief recap of the year
+    * Overview of OpenEXR 3.0 release
+    * Overview of Imath (given by Owen)
+    * Introduction of new openexr.com (hopefully given by Sarah Martin)
+
+  * Arkell agreed to provide some updated images for the
+    openexr-images repo, although he reports that he's not prepared to
+    generate and deep exr images.
+
+  * Cary requested 25 minutes, but given that Imath is a major topic,
+    we expect enough comments and feedback that we should increase
+    that to 55 minutes. Cary will follow up with Emily Olin.
+
+  * Larry notes: This is the biggest release in a very long time, with
+    signficant implications to the user community. Everyone who builds
+    openexr is going to be affected.
+
+  * We should expect lots of questions and vigorous discussion. We had
+   good questions last year (e.g. “Is OpenEXR appropriate for ML?”)
+
+  * The title of session should prominently feature "Imath".
+
+* 3.0 Release: time to get in any changes that break compatibility.
+
+  We should make a pass at cleaning up exceptions in the OpenEXR tree.
+
+  Some Issues for potential inclusion:
+
+  * getChunkOffsetTableSize https://github.com/AcademySoftwareFoundation/openexr/issues/740
+
+  * Include guards https://github.com/AcademySoftwareFoundation/openexr/issues/636
+
+  * Signed strides: https://github.com/AcademySoftwareFoundation/openexr/issues/614
+
+  We will need to take care with how OpenEXR references Imath. It
+  could potentially be an external project path in cmake that
+  auto-clones imath repo. Nick reports that this works well with
+  OpenTimelineIO.
+
+  We should remove legacy thread support, just use std::thread We
+  still want to provide the semaphore class. Lock is slower than a
+  semaphore class.  Keep the shim layer.
+
+  We should we move some of the directories up a level, so the OpenEXR repo has subfolders:
+
+  * src
+
+  * test
+
+  * tools
+
+* OSS-Fuzz: Going well so far, around a dozen issues, which have been
+  easy to reproduce and identify. It takes some thought to determine
+  how to resolve them. Do we want to break compatibility, or suppress
+  it?
+
+  Peter points out that the most recent report, the test case is
+  broken, the exr is bad data. Peter will follow up with fuzz folks.
+
+* Owen reports on progress with Imath.
+
+  * Initial push of constexpr changes
+
+  * A small set of tests. There are some python binding missing.
+
+  * Cuda: The strategy is when compiling with Cuda, put half into Imath internal namespace.
+
+    What is different between cuda and imath half? Bit layout is the
+    same. Our class has HasInf, could use std::isinf override.  Rod:
+    We tried to merge with NVIDIA.
+
+    Owen will write a test that verifies the behavior.  Should still
+    support C++11.
+
+  * Create a RC3 branch.
+
+* clang-format: Would like to reformat before the 3.0 release.  Nick
+  says that OpenTimelineIO used the openexr template with
+  success. Larry notes: Whatever we choose, there will be sections
+  that don't format nicely, so just turn off formatting.  But, a year
+  later, you'll forget about what you didn't like.
+
+  Don't like #include sorting, it can break the build; alphabetical
+  order is not always what you want.
+