/* Copyright (C) 1996, 1999 Aladdin Enterprises.  All rights reserved.
  
  This file is part of GNU ghostscript

  GNU ghostscript 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, or (at your option) any later version.

  GNU ghostscript 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
  ghostscript; see the file COPYING. If not, write to the Free Software Foundation,
  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

*/

/* $Id: gsflip.h,v 1.4 2005/12/13 16:57:21 jemarch Exp $ */
/* Interface to routines for "flipping" image data */

#ifndef gsflip_INCLUDED
#  define gsflip_INCLUDED

/*
 * Convert planar (MultipleDataSource) input to chunky format.  The input
 * data starts at planes[0] + offset ... planes[num_planes-1] + offset; the
 * output is stored at buffer.  This procedure assumes that the input
 * consists of an integral number of pixels; in particular, for 12-bit
 * input, nbytes is rounded up to a multiple of 3.  num_planes must be >=0;
 * bits_per_sample must be 1, 2, 4, 8, or 12.  Returns -1 if num_planes or
 * bits_per_sample is invalid, otherwise 0.
 */
extern int image_flip_planes(byte * buffer, const byte ** planes,
			     int offset, int nbytes,
			     int num_planes, int bits_per_sample);

#endif /* gsflip_INCLUDED */
