Loading png files to the system

Hello all,

I am trying to load and draw dinamically, during execution, png files to our system. I have seen that there are several functions inside the GUIX API to convert png files into guix resources dinamically:

gx_image_reader_create
gx_image_reader_palette_set
gx_image_reader_start

But we have not been able to find any example on how to use them. Is there someone else using these functions or anyone knows where to find examples about this topic?

Thanks in advance

 Imanol