Drawn image is shown with interlaced horizontal black lines? about jacscript HOT 3 OPEN

@mmoskal I see you wrote some of that c code that runs the image render, any insights here (sorry for the direct ping)

I did a deep dive to see if there was anything I could do in userland but I think my configuration good, the image context from allocate doesn't allow me to fix this AFAIK.

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You want to make sure you initialize the screen correctly. Eg code for 1.14inch picolcd is this:

   const d = new ST7789Driver(Image.alloc(240, 136, 4), {
            dc: pins.GP8,
            cs: pins.GP9,
            reset: pins.GP12,
            // frmctr1: 0x0e_14_ff,
            flip: false,
            spi: spi,
            offX: 40,
            offY: 53,
        })
        await d.init()

You need to make sure you have similar code that matches what's in the vendor's C libraries. Also they say the display is 135px tall, but it's probably 136px; if not that may be a problem

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I can render background colors, circles and squares just fine. The only issue is images. I was thinking because if this it wouldn't be my configuration.

Here's my config, looks the same.

spi.configure({
  mosi: gpio(35),
  sck: gpio(36),
  hz: 8_000_000,
})

// backlight led
gpio(38).setMode(GPIOMode.OutputHigh)

const width = 240
const height = 136

const display = new ST7789Driver(Image.alloc(width, height, 4), {
    dc: gpio(34),
    cs: gpio(37),
    reset: gpio(33),
    // frmctr1: 0x0e_14_ff,
    flip: false,
    spi: spi,
    
    offX: 40,
    offY: 53,
})

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