#ifndef COMET_EFFECT_H
#define COMET_EFFECT_H

#include <cairo.h>

#include "util.h"

typedef struct effect effect_t;

typedef struct effect_info effect_info_t;

typedef struct layout layout_t;

// NOTE: Should only allocate the effect and set any extra values
//
typedef effect_t *(*effect_allocate_t)(const effect_info_t *info);

// NOTE: Must free any state associated with the effect
//
typedef void (*effect_finalize_t)(effect_t *effect);

typedef void (*effect_render_t)(effect_t *effect, layout_t *layout, cairo_t *cr);

// NOTE: effect_info's state will be free'd simply
//
struct effect_info {
    char *label;
    struct timespec duration;
    effect_allocate_t allocate;
    effect_finalize_t finalize;
    effect_render_t pre;
    effect_render_t post;
    void *state;
};

struct effect {
    const effect_info_t *info;
    struct timespec start;
    struct effect *next;
};

void effect_init(effect_t *effect, const effect_info_t *info);

void effect_free(effect_t *effect);

#endif