int libjpeg_read_header(struct image_io *io);
int libjpeg_read_data(struct image_io *io);
int libjpeg_write(struct image_io *io);
int libjpeg_read_header(struct image_io *io);
int libjpeg_read_data(struct image_io *io);
int libjpeg_write(struct image_io *io);
int libpng_read_header(struct image_io *io);
int libpng_read_data(struct image_io *io);
int libpng_write(struct image_io *io);
int libpng_read_header(struct image_io *io);
int libpng_read_data(struct image_io *io);
int libpng_write(struct image_io *io);
int libmagick_read_header(struct image_io *io);
int libmagick_read_data(struct image_io *io);
int libmagick_write(struct image_io *io);
int libmagick_read_header(struct image_io *io);
int libmagick_read_data(struct image_io *io);
int libmagick_write(struct image_io *io);
};
struct image *image_io_read_data_prepare(struct image_io_read_data_internals *rdi, struct image_io *io, uns cols, uns rows, uns flags);
};
struct image *image_io_read_data_prepare(struct image_io_read_data_internals *rdi, struct image_io *io, uns cols, uns rows, uns flags);