imgcvt
This is simply just a png to raw image converter for MCU GUI.
compile
On ubuntu:
git clone https://github.com/singds/imgcvt.git
cd imgcvt
make
After that you have a ../imgcvt/build directory with the executable imgcvt.
usage
To see all the available options run:
imgcvt -h
This is an example supposing you have an example.png image inside your current directory:
imgcvt example.png -frgba8888 -o example.raw
This produces the file example.raw.