Required files
- ffi
- rbconfig
- free-image/types/ffi
- free-image/types/boolean
- free-image/types/rgb_triple
- free-image/types/rgb_quad
- free-image/types/rgb16
- free-image/types/rgba16
- free-image/types/rgbf
- free-image/types/rgbaf
- free-image/types/complex
- free-image/types/info_header
- free-image/enums/color_types
- free-image/enums/dithers
- free-image/enums/filters
- free-image/enums/formats
- free-image/enums/image_types
- free-image/sources/abstract_source
- free-image/sources/io
- free-image/sources/file
- free-image/sources/memory
- free-image/modules/conversions
- free-image/modules/helper
- free-image/modules/icc
- free-image/modules/information
- free-image/modules/modify
- free-image/modules/pixels
- free-image/modules/transforms
- free-image/errors
- free-image/palette
- free-image/scanline
- free-image/bitmap