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How to programme the power on image?

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When the machine is power on each time, we can always see that there is a large logo “Ultimaker” on the LCD screen. I just have a look at the firmware and find that it is programmed through a so long code as following. I am just a little curious why the long code indicate the big logo. What code is it?:)

const uint8_t ultimakerTextGfx[] PROGMEM = {

128, 21, //size









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I am just a little curious why the long code indicate the big logo. What code is it?


I also didn't make it... but it's no secret format...

It's a (sort of) XBM aka X Bitmap.

Commonly used together with the Adafruit GFX-library. There are tools to convert a monochrome bitmap, no need to count the pixels manually...

...for example this one.

What's your intention...?

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Firstly Thank you tinkergnome for the answer. I just notice that sometimes the lcd cannot show the logo correctly, not each time,the image cannot be fully shown in the lcd occasionally .Also there is image Dithering sometimes.So I look into the firmware and try finding the reason. I did not change the firmware. I guess if the code is correct, maybe there is a problem with my lcd screen. Not sure whether my thought is correct.

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