/*
   (c) Copyright 2001-2009  The world wide DirectFB Open Source Community (directfb.org)
   (c) Copyright 2000-2004  Convergence (integrated media) GmbH

   All rights reserved.

   Written by Denis Oliver Kropp <dok@directfb.org>,
              Andreas Hundt <andi@fischlustig.de>,
              Sven Neumann <neo@directfb.org>,
              Ville Syrjälä <syrjala@sci.fi> and
              Claudio Ciccani <klan@users.sf.net>.

   This library 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 library 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 library; if not, write to the
   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
*/

#ifndef __UNIQUE__STRET_ITERATION_H__
#define __UNIQUE__STRET_ITERATION_H__

#include <directfb.h>

#include <unique/types.h>


#define STRET_ITERATION_MAX_DEPTH  4

typedef struct {
     StretRegion *region;
     int          level;
     int          index;
} StretIterationStackFrame;

typedef struct {
     int                       magic;

     StretIterationStackFrame  stack[STRET_ITERATION_MAX_DEPTH];
     int                       frame;

     int                       x0;
     int                       y0;

     StretRegion              *abort;
} StretIteration;


void         stret_iteration_init ( StretIteration  *iteration,
                                    StretRegion     *region,
                                    StretRegion     *abort_at );

StretRegion *stret_iteration_next ( StretIteration  *iteration,
                                    const DFBRegion *clip );

void         stret_iteration_abort( StretIteration  *iteration );

#endif