#ifndef KITATLAS_H
#define KITATLAS_H

#include <stdbool.h>
#include <SDL2/SDL_rect.h>
#include <SDL2/SDL_surface.h>
#include <SDL2/SDL_render.h>

#include "kitchensink/kitconfig.h"

#define MAX_SHELVES 256

typedef struct Kit_TextureAtlasItem {
    int cur_shelf; //< Current shelf number in cache
    int cur_slot; //< Current slot on shelf in cache
    bool is_copied; //< Is copied to cache surface
    SDL_Rect source; //< Source coordinates on cache surface
    SDL_Rect target; //< Target coordinates on output surface
    SDL_Surface *surface; //< Current item surface
} Kit_TextureAtlasItem;

typedef struct Kit_TextureAtlas {
    int cur_items; //< Current items count
    int max_items; //< Maximum items count
    int w; //< Current atlas width
    int h; //< Current atlas height
    Kit_TextureAtlasItem *items; //< Cached items
    uint16_t shelf[MAX_SHELVES][3]; //< Atlas current shelf width, height, item count
} Kit_TextureAtlas;

KIT_LOCAL Kit_TextureAtlas* Kit_CreateAtlas(int w, int h);
KIT_LOCAL void Kit_FreeAtlas(Kit_TextureAtlas *atlas);
KIT_LOCAL void Kit_RefreshAtlas(Kit_TextureAtlas *atlas, double current_pts);
KIT_LOCAL void Kit_ClearAtlasContent(Kit_TextureAtlas *atlas);
KIT_LOCAL int Kit_UpdateAtlasTexture(Kit_TextureAtlas *atlas, SDL_Texture *texture);
KIT_LOCAL int Kit_GetAtlasItems(const Kit_TextureAtlas *atlas, SDL_Rect *sources, SDL_Rect *targets, int limit);
KIT_LOCAL int Kit_AddAtlasItem(Kit_TextureAtlas *atlas, SDL_Surface *surface, const SDL_Rect *target);

#endif // KITATLAS_H
