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pngio.py: MicroPython's pngio, on CPython over Pillow - #125
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import pngionow works the same on CPython as on MicroPython. MicroPython builds carry the C module (PyDevices/micropython-pydevices,modules/pngio). On CPython,utils/pngio.pygives the samePngEncoder/PngDecoderAPI over Pillow, so an app doesn't know which runtime it's on (Brad, 2026-10-07). It ships in pydevices-desktop, like everything inutils/. Without Pillow, the import sayspip install pillow.micropython-pydevices'
modules/pngio/tests/test_pngio.pyruns unchanged against this file. Onpython(Linux) andpython.exe(Windows) it gives exact RGB565 round trips, the formats, the stride and placed decode, and every error, raised where the C module raises it.tests/test_pngio.pyhere covers the CPython-only parts, and skips its round trip when Pillow isn't installed, as in this repo's unittest job.