/* === S Y N F I G ========================================================= */

/*!	\file target.cpp

**	\brief Target Class Implementation

**

**	$Id$

**

**	\legal

**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley

**  Copyright (c) 2010 Diego Barrios Romero

**

**	This package 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 package 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.

**	\endlegal

*/

/* ========================================================================= */

/* === H E A D E R S ======================================================= */

#ifdef HAVE_CONFIG_H

# include <config.h></config.h>

#endif

#include "target.h"

#include "string.h"

#include "canvas.h"

#include "target_null.h"

#include "target_null_tile.h"

#include "targetparam.h"

using namespace synfig;

using namespace etl;

using namespace std;

synfig::Target::Book* synfig::Target::book_;

synfig::Target::ExtBook* synfig::Target::ext_book_;

/* === P R O C E D U R E S ================================================= */

bool

Target::subsys_init()

{

	book_=new synfig::Target::Book();

	ext_book_=new synfig::Target::ExtBook();

	// At least one target must be available.

	book()["null"].factory =

		reinterpret_cast<synfig::target::factory>(&Target_Null::create);</synfig::target::factory>

	book()["null"].filename = "null";

	book()["null"].target_param = TargetParam();

	ext_book()["null"]="null";

	book()["null-tile"].factory =

		reinterpret_cast<synfig::target::factory>(&Target_Null_Tile::create);</synfig::target::factory>

	book()["null-tile"].filename = "null-tile";

	book()["null-tile"].target_param = TargetParam();

	ext_book()["null-tile"]="null-tile";

	return true;

}

bool

Target::subsys_stop()

{

	delete book_;

	delete ext_book_;

	return true;

}

Target::Book&

Target::book()

{

	return *book_;

}

Target::ExtBook&

Target::ext_book()

{

	return *ext_book_;

}

/* === M E T H O D S ======================================================= */

Target::Target():

	quality_(4),

	alpha_mode(TARGET_ALPHA_MODE_KEEP),

	avoid_time_sync_(false),

	curr_frame_(0)

{

}

void

synfig::Target::set_canvas(etl::handle<canvas> c)</canvas>

{

	canvas=c;

	RendDesc desc=canvas->rend_desc();

	set_rend_desc(&desc);

}

Target::Handle

Target::create(const String &name, const String &filename,

			   synfig::TargetParam params)

{

	if(!book().count(name))

		return handle<target>();</target>

	return Target::Handle(book()[name].factory(filename.c_str(), params));

}

int

Target::next_frame(Time& time)

{

	int

	total_frames(1),

	frame_start(0),

	frame_end(0);

	Time

	time_start(0),

	time_end(0);

	frame_start=desc.get_frame_start();

	frame_end=desc.get_frame_end();

	time_start=desc.get_time_start();

	time_end=desc.get_time_end();

	// TODO: Add option to exclude last frame

	// If user wants to recover the last buggy behavior then 

	// expose this option to the interface using the target params.

	// At the moment it is set to false.

	bool exclude_last_frame(false);

	// Calculate the number of frames

	total_frames=frame_end-frame_start+(exclude_last_frame?0:1);

	if(total_frames<=0)total_frames=1;

	if(total_frames == 1)

	{

		time=time_start;

	}

	else

	{

		time=(time_end-time_start)*curr_frame_/(total_frames-(exclude_last_frame?0:1))+time_start;

	}

//	synfig::info("before curr_frame_: %d",curr_frame_);

	curr_frame_++;

//	synfig::info("before curr_frame_: %d",curr_frame_);

//	synfig::info("total_frames: %d",total_frames);

//	synfig::info("time_end: %s",time_end.get_string().c_str());

//	synfig::info("time_start: %s",time_start.get_string().c_str());

//	synfig::info("time: %s",time.get_string().c_str());

//	synfig::info("remaining frames %d", total_frames-curr_frame_);

	return total_frames- curr_frame_;

}