/* @(#) ceil() an image ... no promotion, so output type == input type
 * @(#)
 * @(#) int 
 * @(#) im_ceil( in, out )
 * @(#) IMAGE *in, *out;
 * @(#)
 * @(#) Returns 0 on success and -1 on error
 * @(#)
 *
 * 20/6/02 JC
 *	- adapted from im_abs()
 */

/*

    This file is part of VIPS.
    
    VIPS is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser 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

 */

/*

    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk

 */

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

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <assert.h>

#include <vips/vips.h>

#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/

#define ceil_loop(TYPE)\
	{\
		TYPE *p = (TYPE *) in;\
		TYPE *q = (TYPE *) out;\
		\
		for( x = 0; x < sz; x++ )\
			q[x] = ceil( p[x] );\
	}

/* Ceil a buffer of PELs.
 */
static void
ceil_gen( PEL *in, PEL *out, int width, IMAGE *im )
{	
	int x;
	int sz = width * im->Bands;

        switch( im->BandFmt ) {
        case IM_BANDFMT_FLOAT: 		ceil_loop(float); break; 
        case IM_BANDFMT_DOUBLE:		ceil_loop(double); break; 
        case IM_BANDFMT_COMPLEX:	sz *= 2; ceil_loop(float); break;
        case IM_BANDFMT_DPCOMPLEX:	sz *= 2; ceil_loop(double); break;

        default:
		assert( 0 );
        }
}

/* Ceil of image.
 */
int 
im_ceil( IMAGE *in, IMAGE *out )
{	
	/* Check args.
	 */
	if( in->Coding != IM_CODING_NONE ) {
		im_error( "im_ceil", "%s", _( "not uncoded" ) );
		return( -1 );
	}

	/* Is this one of the int types? Degenerate to im_copy() if it
	 * is.
	 */
	if( im_isint( in ) )
		return( im_copy( in, out ) );

	/* Output type == input type.
	 */
	if( im_cp_desc( out, in ) )
		return( -1 );

	/* Generate!
	 */
	if( im_wrapone( in, out, 
		(im_wrapone_fn) ceil_gen, in, NULL ) )
		return( -1 );

	return( 0 );
}