So we seem to have reached mostly-stable state for the PyOpenGL 4.0.0 release. There's no other planned major changes to the core library, so unless we see significant regressions we'll likely release 4.0.0 final over the next few weeks.

Changes since the 4.0.0a5 release last mentioned here:

Bug/crash fixes:

* OSMesa -- a dropped OffscreenContext cleans up and prevents further writes
* Buffers -- a memoryview upload sent the wrapper instead of the data; this is fixed
* Buffers -- use-after-free in the buffers format handler is fixed
* Offsets -- an integer where a const void* is wanted is treated as a buffer offset (regression)
* Arrays -- bare numbers are accepted as input types again (regression)
* Arrays -- an input array is checked against the length count
* Dispatch -- a function derived from a C entry point keeps its own customisations
* Dispatch -- define() applies the annotation table to every command
* Dispatch -- context handles now compares equal to themselves
* Bindings -- glGetUniformIndices takes names and returns indices
* Bindings -- GL 3.0 pixel formats (GL_RG and similar) are sized without importing their extension module
* Bindings -- A wrapper that names a parameter its entry point lacks is handled
* OpenGL.GLES2 imports with error checking switched off (regression)
* Errors -- error messages are bounded size for all wrappers
* Errors -- NullFunctionError says which of three things went wrong
* Errors -- a platform plugin or format handler that will not import now reports which one and why
* Errors -- a config flag set too late says so rather than silently failing to activate
* Python 3.15 -- no longer reads ctypes.__version__ and 3.15 is added to CI/tox

VBO Helper

* References and aliases -- VBO attributes hold their own references
* VBO and VBOOffset are accepted by every array alias
* vbo.VBO is a class to type checkers
* Context sharing -- dispatch.share_context, gives contexts that share objects one identity

Platform Support

* Tk GLFrame for macOS (Aqua), working on Apple silicon (only tested in CI however)
* Tk Contexts take a swapInterval
* OSMesa now runs on Windows
* EGL -- the gbm render node is opened read-write
* Windows -- a GL library beside the interpreter is preferred to the system one (ANGLE support)
* Windows -- user-installed freeglut is found by its own name
* Windows -- opengl32 is loaded from Windows rather than from PATH
* Windows -- freeglut and GLE binaries left the main wheel. pip install PyOpenGL[glut] brings them back
* Namespaces -- a platform-specific API says which platform serves it

Packaging and CI

* Wheels -- arm64, aarch64 and Intel Mac wheels are built
* PyOpenGL_accelerate now has the same version as PyOpenGL, run-time checks it
* sdist no longer ships Cython output
* Test and CI setup -- the suite runs on OSMesa, and CI runs it there
* macOS test suite that never ran is not counted as a failing suite.

Tests, tooling and docs

* Tests -- a large batch of added tests. Many are tickets from the github tracker
* Lint -- ruff cleanups, typing cleanups
* Docs -- lots of updates, particularly around how we're generating them