Export a png in 8bpc RGBA pixelformat and take note of the size

then you can either use stb_image and include stb_image.h

• unsigned char *img = stbi_load("resources/calcbut.png", &width, &height, &channels, 0);

or use xxd -i calcbut.png > calcbut.h on the terminal and include calcbut.h

• make a pointer to the array in calcbut.h unsigned char *img2 = calcbut_png;

or use ld to link the png as a binary blob into the executable

• ld -r -b binary -o calcbut.o calcbut.png on the terminal (this Makefile does this for you)

• extern unsigned char _binary_calcbut_png_start[];
  extern unsigned char _binary_calcbut_png_end[];
  unsigned char *p = _binary_calcbut_png_start;
  

ram those pointers into CNFGBlitImage type casted as an unsigned int, the first 2 parameters are x,y coordinates of where you want the o,o pixel of your image to appear on the screen, the second 2 are the width and height of your image (you took notes for this in the first step)

• CNFGBlitImage((unsigned int*)img, 10, 10, width, height);
  CNFGBlitImage((unsigned int*)img2, 10, 200, 300, 88);
  CNFGBlitImage((unsigned int*)p, 10, 400, 300, 88);