[LVGL] Choosing how to use fonts and images #2

[SinglWolf]

The beginning here: ([LVGL] Choosing how to use fonts and images)
I share my joy! I managed to completely port my project from SLS to EEZ Studio 🥳🎉.

Some things are upsetting, but I am sure that together we will fix everything.
After a while, I will write a report on the use of fonts and images as bin-files.

[SinglWolf]

As you can see in the screenshot in the message above, fonts from binary files are working. But there's a problem with the pictures.
Expected

On a real device

If I use real images, for example

lv_image_set_src(obj, "L:/icons/boot.png");

instead of

lv_image_set_src(obj, "L:/sd-card/ui_image_boot.bin");

everything works

I've tried different color formats, but it doesn't work.

The RAW and RAW ALPHA format causes this error during Build

[SinglWolf]

I wanted to transfer the files to a card microSD via the built-in ftp server of the old project, but it didn't work out due to the size of the image-bin files being too large.
To implement the existing settings for using fonts and images in EEZ Studio, I had to remove the microsd card from the device, insert it into the phone, create an sd_card directory on the microsd card and copy fonts and images from different project folders!

Initially, I suggested using #752 (comment), which would allow us to use existing files on the device's microsd card.
I also suggest creating file names the same as in the project, for example


with the appropriate extension, but not like it is now

[SinglWolf]

When using fonts embedded in the source code, no checks should be made for its presence - this is absurd. However, if the font is used as a binary file, then its absence on the storage device leads to a crash. Using the ESP32-S3 as an example, I can say with confidence that by default, if any critical errors occur, the system is configured to reboot immediately. If there is no font file, ESP32 will switch to bootloop, and even when monitoring via UART, it will be very difficult to understand the reason. And the reason is trivial - the missing file is due to the human factor. This may not be relevant at the design stage, but it is critical for the end user.
If this question is relevant to you, I can show you how the font file check missing is implemented in my project.
It's just an idea. I want to help make EZZ Studio a worthy competitor for other similar solutions.