Printing image to brain in vexcode without an SD card

[squiddy_slapper]

I have been looking through the forum for a while now, and I can’t find out how to print an image to the brain without using an SD card. Anyone care to help?

[anon4126930]

Note that this is an unofficial response
You can convert images to a byte array:

Image Converter

Then you can probably figure out how to print byte arrays using lvgl (I don’t have experience with LVGL so I don’t know how to exactly do it)

Worst case scenario, you can buy a micro sd for $10 easy.

[trontech569]

Yes.

This thread talks about it:

Displaying images on the brain

Can you use images, bitmaps, et cetera on an sd card to display images while running a program?

But this is the specific guide that is linked.

Can you upload picture/gif to brain without sd card?

You need to turn the image (png or bmp) into a C struct and then display that using the drawImageFromBuffer function. We do not directly provide any tools to do this, but it is fairly easy using tools available online, this is one way, there may be others available as well. Images must be less than 480x240 pixels in size or they will not display. In general this method should only be used for smaller images as it will make the program much larger. Go to the LVGL image converter page. Altho…

[squiddy_slapper]

Is this what it is supposed to look like? If so, what am I supposed to do from this point?

this is some of it, I had to cut a bunch out

const uint16_t download (7)[225][225] = {
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};

[jpearman]

No, that data is not correct.
Did you follow the instructions I posted ?

Can you upload picture/gif to brain without sd card?

You need to turn the image (png or bmp) into a C struct and then display that using the drawImageFromBuffer function. We do not directly provide any tools to do this, but it is fairly easy using tools available online, this is one way, there may be others available as well. Images must be less than 480x240 pixels in size or they will not display. In general this method should only be used for smaller images as it will make the program much larger. Go to the LVGL image converter page. Altho…

[tabor473]

I was really impressed “how could he possibly know the data looked or didn’t look good, can JPearman visualize in his head images from raw byte arrays” and then I looked at the data and it wasn’t a bye array, plus there were only like 4 unique values.

[jpearman]

@squiddy_slapper

const uint16_t download (7)[225][225] = {

yea, as soon as you see this you know it wont work.

[squiddy_slapper]

@jpearman

Did you follow the instructions I posted ?

I posted my reply right after he sent that topic. I didn’t get a chance to look at it before I posted mine. That does make sense and I will try it tomorrow when I have the robot.