/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

/* Provides facilities for writing pictures and seperate views to .png files */


#ifndef _SCI_GRAPHICS_PNG_H_
#define _SCI_GRAPHICS_PNG_H_

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */

#ifdef HAVE_LIBPNG

#include <resource.h>
#include <graphics.h>
#include <png.h>

int
write_pic_png(char *filename, guint8 *pic);
/* Stores a picture map in a png file
** --DEPRECATED--
** Parameters: (filename) The name of the file to create
**             (pic) A pointer to the picture map to store
** Returns   : (int) 0 on success, != 0 otherwise
** Please note that pic must not point to a picture_t, it must point to a
** map.
** E.g. to store the foreground picture, you could use
** write_pic_png("filename.png", picture->maps[0]).
*/


int
png_save_buffer(picture_t pic, char *name,
                int xoffset, int yoffset, int width, int height,
                byte *data, int force_8bpp_special);
/* Stores any buffer in a png file
** Parameters: (picture_t) pic: The picture_t containing the parameters of the buffer
**             (char *) name: File name to write to
**             (int x int) xoffset, yoffset: relative screen position of the buffer
**             (int x int) width, height: Buffer size
**             (byte *) data: The actual data to write
**             (int) force_8bpp_special: See below
** Returns   : (int) 0 on success, 1 otherwise
** Each graphics buffer is stored in the way that the corresponding picture_t
** dictates (all buffers are either identical to, or parts of a past representation
** of the picture_t map 0, after all).
** force_8bpp_special overrides this and forces 8bpp palette mode for writing the
** buffer.
** This should only be used for maps 1 through 3, which are always in this format.
*/


byte *
png_load_buffer(picture_t pic, char *name,
                int *xoffset, int *yoffset, int *width, int *height,
                int *size, int force_8bpp_special);
/* Loads a buffer from a png file
** Parameters: (picture_t) pic: The picture_t containing the target parameters
**             (char *) name: The file name of the file to read from
**             (int* x int*) xoffset, yoffset: Offset storage pointers
**             (int* x int*) width, height: Size storage pointers
**             (int*) size: Memory size storage pointer
**             (int) force_8bpp_special: Import file as 8bpp with palette
** Returns   : (byte *): The buffer on success, NULL otherwise
** xoffset, yoffset, width, height, and size should each point to ints the picture
** parameters are stored in. xoffset and yoffset may be set to NULL, though, in
** order to be omitted.
*/


int
png_save_pic(picture_t pic);
/* Stores a picture_t in the current directory
** Parameters: (picture_t) pic: The picture_t to store
** Returns   : (int) 0 on success, 1 otherwise
*/

int
png_load_pic(picture_t pic);
/* Loads a picture_t from the cwd
** Parameters: (picture_t) pic: The structure to write to
** Returns   : (int) 0 on success, 1 otherwise
** On error, the original pic status is retained.
*/


#endif /* HAVE_LIBPNG */
#endif /* !_SCI_GRAPHICS_PNG_H_ */