/* SPDX-License-Identifier: MIT */
/*
 * konpicture.h
 *
 * Copyright (c) 2026 KonAki
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef KONPICTURE_H
#define KONPICTURE_H

#include "konsofren.h"
#include "kon2d.h"

#ifdef __cplusplus
extern "C" {
#endif

/*** definition ***/

/* pictures drawn over the screen that can be moved, faded, turned and tinted, the way RPG Maker has them: a number of slots
   drawn in order so a higher one is in front, each a picture with a place, a scale in percent, an opacity from 0 to 255,
   a blend, an angle and a tone. all the times are in frames at 60 a second, like RPG Maker counts them.
   a number that isn't a slot does nothing, so a bad script can't write outside of them */

#define KON_PICTURES 100
#define KON_PICTURE_NAME 64

/* gives the image for a name, or NULL. the pictures do not own what it gives, whoever made the image keeps it until the picture is
   erased or replaced */
typedef const kon_image *(*kon_pictureLoad)(const char *name, void *user);

typedef struct kon_picture {
	int shown;
	char name[KON_PICTURE_NAME];
	const kon_image *image;
	int origin; /* 0 top left, 1 middle */
	int blend; /* a kon_blend_t: 0 normal, 1 add, 2 multiply, 3 screen */
	kon_tween_t x, y, scaleX, scaleY, opacity;
	kon_tween_t tone[4]; /* red, green, blue added from -255 to 255 and gray from 0 to 255 */
	float angle; /* radians */
	float turn; /* RPG Maker's rotation speed */
	kon_image *toned; /* a copy with the tone in it, made when there is one to apply */
	int tonedFor[4];
} kon_picture_t;

typedef struct kon_pictures {
	kon_picture_t slot[KON_PICTURES];
	kon_pictureLoad load;
	void *user;
} kon_pictures_t;

/*** pictures ***/

void kon_picturesInit(kon_pictures_t *pictures, kon_pictureLoad load, void *user);
void kon_picturesFree(kon_pictures_t *pictures);

/* id is 1 to KON_PICTURES. scale is a percent. this puts everything back as given, a picture that is already there is replaced */
void kon_pictureShow(kon_pictures_t *pictures, int id, const char *name, int origin, int x, int y, int scaleX, int scaleY, int opacity, int blend);

/* goes to the new values over frames, with easing 0 constant, 1 slow start, 2 slow end, 3 slow both. 0 frames is at once */
void kon_pictureMove(kon_pictures_t *pictures, int id, int origin, int x, int y, int scaleX, int scaleY, int opacity, int blend, int frames, int easing);

/* turns clockwise, speed is RPG Maker's: half a degree a frame for each 1. 0 stops it */
void kon_pictureRotate(kon_pictures_t *pictures, int id, int speed);
void kon_pictureTint(kon_pictures_t *pictures, int id, int red, int green, int blue, int gray, int frames);
void kon_pictureErase(kon_pictures_t *pictures, int id);

void kon_picturesUpdate(kon_pictures_t *pictures, float dt);
/* draws the shown ones in order, a made copy of a toned picture is kept in the slot, which is why this changes the pictures */
void kon_picturesDraw(kon_pictures_t *pictures, kon_framebuffer_t *fb);

/* 1 while any picture is still moving or changing tone, what a "wait" in a script waits for */
int kon_picturesBusy(const kon_pictures_t *pictures);

#ifdef __cplusplus
}
#endif
#endif /* KONPICTURE_H */