color setting for bpp = 8 ?

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  • As far as I can see, possible bpp values are 1,2,4,8,16,24,32
    In set Color bpp of 16,24,32 are handled seperately
    All others result in 0 or 0xFFFFFFFF only
    Is there a technical reason for that ?

  • Are you sure about that? Maybe I'm misunderstanding the question.

    In 16/24/32 you get R,G and B channels handled separately (if you specify them), but in anything else it's considered that the image is a single channel, so setColor(123) for a BPP of 4 would write the value 123.

  • Hmmm, may be I'm misunderstanding the answer.
    First, setColor(123) sets color correctly to 123.
    Why is setColor( not supported for bpp = 8 ?
    If this is on purpose a short hint in description would help.

  • Ahh, ok - yes, It's not supported because there's no standard way of mapping R,G and B to a single 8 bit value (same with 1, 2 and 4 bits). About the only thing you could reliably assume is white being all 1 and black being all 0 (or vice versa) which is what it does.

    I've updated the docs here:­mit/8ef686d5f405abd5ed76e80dbaa8930c49b9­4f69

    If you have some specific display that works another way, nothing stops you from just overriding setColor with your own implementation though...

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color setting for bpp = 8 ?

Posted by Avatar for JumJum @JumJum