Additional framebuffer

[Jeff-Squared]

I am using a TFT driver designed by Peter Hinch and the class inherits the framebuffer class. This works well with no issues but I was wondering how difficult it would be to add a second framebuffer in the same class. Here is the relevant part of the code I already have

class LCD(framebuf.FrameBuffer):
        buf = bytearray(height * width * 2)
        self._mvb = memoryview(buf)
        super().__init__(buf, width, height, framebuf.RGB565)

[mendenm]

This is a classic python has-a versus is-a situation. Making something a subclass is cute, but often limiting, in exactly the way you see. You might want to make your LCD class own framebuffers, rather than be a framebuffer. Then, you have complete freedom to control a list of framebuffers, as needed. You can pass through the calls in the framebuf.FrameBuffer class that you actually need, but select which framebuffer in your list receives the calls.

[Jeff-Squared]

Thanks for the response. That is basically how I began with framebuffers, importing rather than inheriting so I don't have a problem doing that. I'll mark that as being the solution and I will continue to monitor the thread if anyone else has any suggestions or pointers to help me understand multiple inheritance, it seems to be more complex than I first imagined. Again thank you.

[peterhinch]

The reason for using inheritance is that it enables display drivers to be absurdly simple while providing the display primitives offered by FrameBuffer. My approach to a pair of displays is to instantiate two display drivers (each subclassed from FrameBuffer).

[Jeff-Squared]

@peterhinch your driver that I mentioned in the original post is still my go to driver for displays as are several other drivers written by you, the mcu I am using has room for two frame buffers and I was experimenting to see if I could gain anything substantial with the additional frame buffer. I had not really thought about a pair of displays on the same controller but it is now on my agenda. Thanks for your input.