NiLuJe 7210fb478d Faster blitting @ BB8/BBRGB32 when no processing is needed (#4847) ...

* Pickup the eponymous blitting performance tweaks from koreader/koreader-base#878
* Cleanup BitOpts usage (require & cache)
* Unify oddness checks (MOD -> AND)
* Enforce the native Portrait orientation on Kobo (except @ 16bpp, i.e., KSM w/ 8bpp swap disabled), to allow for faster blitting when unrotted.
* Switch CRe BB to 32BPP on color screens
* Minor cleanups

2019-03-27 22:50:44 +01:00

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