How to generate .c image files for OLED display?

Question

Arduino

I tried LCD Assistaint , the pictures are crooked.
The usual array of 10x10 "pixels" takes about 1Kb.
It is desirable that the solution is suitable for the OLED_I2C library.

Answer 1

Load the image into GIMP and export it to xpm format to get a char array, where each ASCII character encodes the color of a pixel. Or in the xbm format to get an array of type uint8_t, where the color of a pixel is encoded by a byte.