Endians issues with slint / mipidsi / ST7789 / esp32 rust no idf

[mgrenonville]

Hello,

Thanks for this project.
I try to implement an EspBackend for ST7789 in rust, based on this code.
I have correctly identified that I need to invert_color with my mipidsi display, however, I might have a endianess issue:

            circle1 := Circle { y:0; background: green; x: 85px; }
            circle2 := Circle { background: blue; x: 85px; y: 40px; }

Which renders to :

Using embedded-graphics works like a charm, but with slint, green pixels should be blue, and blue should be green.
Here is my display config:

    let mut display = Builder::new(ST7789, di)
        .reset_pin(rst)
        .color_order(mipidsi::options::ColorOrder::Rgb)
        .invert_colors(ColorInversion::Inverted)
        .init(&mut delay)
        .unwrap();

I have tried to swap ColorOrder to Gbr, but i have a similar issue. I guess that i need to use a similar trick of SlintPlatformConfiguration::color_swap_16 but I can't find how to do this with rust api.

Could you help me ?

[ogoffart]

You may need to do a manual pass to change the byte order.
Just loop over the buffer before sending it to the screen to swap bytes

[mgrenonville]

Hello,

I'm sorry, after checking everything, it works as expected, i was messed up by all the code I wrote before 😓