#ifndef BITMAP_H
#define BITMAP_H

#include <assert.h>
#include <stddef.h>
#include <stdint.h>

enum rgb {red, green, blue, rgb};
enum rgba {alpha = rgb, rgba};
enum cmyk {cyan, magenta, yellow, black, cmyk};
enum grey {level, grey};

typedef union {
    uint8_t bytes[4];
    uint8_t cmyk[cmyk];
    uint8_t rgba[rgba];
    uint8_t rgb[rgb];
    uint8_t grey[grey];
} colour;

static_assert(sizeof (colour) == sizeof (colour){0}.bytes, "");

struct bitmap {
    size_t width;
    size_t height;
    colour clear;
    enum depth {mono1, grey8, index8, rgb24, rgba32, cmyk32} depth;
    uint8_t data[];
};

struct bitmap *clearbitmap(struct bitmap *, colour);
struct bitmap *createbitmap(struct bitmap);
colour getbitmap(const struct bitmap *, size_t, size_t);
struct bitmap *destroybitmap(struct bitmap *);
struct memory {size_t size; uint8_t *bytes;} exportbitmap(struct bitmap *);
struct bitmap *setbitmap(struct bitmap *, size_t, size_t, colour);

#endif