/* 
 * XPilot NG, a multiplayer space war game.
 *
 * Copyright (C) 1991-2001 by
 *
 *      Bjørn Stabell        <bjoern@xpilot.org>
 *      Ken Ronny Schouten   <ken@xpilot.org>
 *      Bert Gijsbers        <bert@xpilot.org>
 *      Dick Balaska         <dick@xpilot.org>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef GFX2D_H
#define GFX2D_H

extern char	*texturePath;		/* Path list of texture directories */
extern char     *realTexturePath;       /* Real texture lookup path */

typedef unsigned int RGB_COLOR;

#define RGB24(r, g, b) \
((RGB_COLOR)((((b)&255) << 16) | (((g)&255) << 8) | ((r)&255)))

#define RED_VALUE(col) ((col) &255)
#define GREEN_VALUE(col) (((col) >> 8) &255)
#define BLUE_VALUE(col) (((col) >>16) &255)

/*
 * Purpose: bounding box for one image or a set of images.
 * The xmin and ymin elements give the lowest coordinate which
 * has a non-black color value.  The xmax and ymax elements
 * give the highest coordinate which has a non-black color.
 * The number of pixels covered by one box is given by:
 * (xmax + 1 - xmin, ymax + 1 - ymin).
 */
typedef struct {
    int xmin, ymin;
    int xmax, ymax;
} bbox_t;


/*
 * Purpose: A device/os independent structure to do keep 24bit images in.
 * an instance of xp_picture_t can contain more than 1 image, 
 * This feature is  useful for structural identical bitmaps (example: items), 
 * and rotated images. When dealing with rotated images, the first image
 * in the xp_picture_t structure is used as texture for the transformation of
 * the others.
 */

typedef struct {
    unsigned	width, height;
    int		count;
    RGB_COLOR	**data;

    bbox_t	*bbox;
} xp_picture_t;

int Picture_init(xp_picture_t *picture, const char *filename, int count);
int Picture_load( xp_picture_t *picture, const char *path);
int Picture_rotate(xp_picture_t *picture);

void Picture_set_pixel(xp_picture_t *picture, int image, int x, int y, 
		       RGB_COLOR color);
RGB_COLOR Picture_get_rotated_pixel(const xp_picture_t *picture, 
				    int x, int y, int image);
RGB_COLOR Picture_get_pixel(const xp_picture_t *picture, int image,
			    int x, int y);
RGB_COLOR Picture_get_pixel_area(const xp_picture_t *picture, int image, 
				 double x_1, double y_1, double dx, double dy);
void Picture_get_bounding_box(xp_picture_t *picture);

#endif