/*
 * layer.h - Separate graphics operations by layers and replay
 *
 * Written 2016 by Werner Almesberger
 * Copyright 2016 by Werner Almesberger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */


#ifndef LAYER_H
#define	LAYER_H

#include "gfx.h"


struct layer_obj;

struct layer_objs {
	unsigned layer;
	struct layer_obj *obj;
	struct layer_obj **next_obj;
	struct layer_objs *next;
};

struct layer {
	const struct gfx_ops *ops;
	void *user;
	int xmin, xmax;
	int ymin, ymax;
	struct layer_objs *objs;
};


void layer_line(void *ctx, int sx, int sy, int ex, int ey,
    int color, unsigned layer);
void layer_rect(void *ctx, int sx, int sy, int ex, int ey,
    int color, int fill_color, unsigned layer);
void layer_poly(void *ctx, int points, const int x[points], const int y[points],
    int color, int fill_color, unsigned layer);
void layer_circ(void *ctx, int x, int y, int r,
    int color, int fill_color, unsigned layer);
void layer_arc(void *ctx, int x, int y, int r, int sa, int ea,
    int color, int fill_color, unsigned layer);
void layer_text(void *ctx, int x, int y, const char *s, unsigned size,
    enum text_align align, int rot, unsigned color, unsigned layer);

void layer_init(struct layer *layer, const struct gfx_ops *ops, void *user);
void layer_wipe(struct layer *layer);
void layer_replay(const struct layer *layer);
void layer_bbox(const struct layer *layer, int *x, int *y, int *w, int *h);
void layer_destroy(struct layer *layer);

#endif /* !LAYER_H */