Python refactor #1477

ledvinap · 2022-11-01T20:52:35Z

(For discussion)

Refactor python bindings a bit, fixing various problems leading to SEGFAULT
class passed to SwapOnVSync is returned on second call unmodified
FrameCanvas is recycled when python object is freed

Add support for FrameCanvas::Serialize:

Python class with Buffer Protocol is returned
It can be easily used to write to file etc. (and no copy is necessary)
Now read-only, but read-write should be safe and it will allow zero-copy writing to framebuffer
- another option is to export Deserialize, possibly with Buffer Protocol interface, but performance will be slightly smaller

Solves problem when installing package directly from git (pipenv install -e )

- Except NULL for cdefs (slightly optimizes performance) - Handle reading NULLs from Options (caused segfault) - Improve handling of parameters for char* options - accepts string-like objects, returns bytes() - Use cython magic for __options - Handle None as NULL in SwapOnVSync (allows wait for sync usage) - Use C++ Canvas object to handle common operations - Use @Property decorator syntax - prevent creation of uninitialized objects from Python code (__new__) - prevent cython classes without corresponding C++ class (raise exception on all paths that can cause it) - Trace displayed FrameCanvas in SwapOnVSync - class passed to SwapOnVSync is returned on second call - Recycle FrameCanvas when python object is freed - FrameCanvas class keeps RGBMatrix alive (RGBMatrix is not deleted before FrameCanvas)

Export Serialize using Python Buffer Protocol Currently only read-only view is supported

``` green = Color(0, 255, 0) rgbmatrix.Fill(*green())

generated using: python3 -m cython -3 --cplus *.pyx

ledvinap added 6 commits November 1, 2022 21:29

Python: Use absolute import

8b901b9

Solves problem when installing package directly from git (pipenv install -e )

Python: Add do_dpio_init option

c3e26bf

Python: Add support for FrameCanvas::Serialize

553848d

Export Serialize using Python Buffer Protocol Currently only read-only view is supported

Python: Add convenience functions to Color()

7361b1c

``` green = Color(0, 255, 0) rgbmatrix.Fill(*green())

Python: New cython cpp files

1433868

generated using: python3 -m cython -3 --cplus *.pyx

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Python refactor #1477

Python refactor #1477

ledvinap commented Nov 1, 2022

Python refactor #1477

Are you sure you want to change the base?

Python refactor #1477

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ledvinap commented Nov 1, 2022