[feature request]: Support for BWR/BWY displays and greyscale

[DL5SMB]

Hi,

now as my setup is working I would like to bring up a feature request:

If I have it right, multi-color displays (red/yellow, black, white) and grayscale are not supported yet.
At least I could not make it work (which means nothing) but I could neither see a routine in the code for converting the input.png to another format than black/white.

So I'd like to bring up the idea to either implement an easy way to offer an already converted file (using Dmitry's tool) for uploading or adding a subroutine to choose into which colour-scheme a file should be converted.

Also another question: Is there already hardware support for a way to generate 800Mhz signals to make the Chroma 74 and Chroma29 display work?

[DL5SMB]

Thanks for having added support for "red", Daniel and Aaron :-)

I've played around with it for some time, trying all the different options
(dithering on/off, 1bbpR, 2bppR, 3bppR and so on) in line 206/208.

I'm getting different pictures every time, so I guess I am not doing it completey wrong. However am I correct assuming that greyscale is not working yet? Only, black, white and red pixels?