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

/*!	\file target_cairo.h

**	\brief Template Header for the Target Cairo class

**

**	$Id$

**

**	\legal

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

**	Copyright (c) 2012-2013 Carlos Lรณpez

**

**	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

*/

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

/* === S T A R T =========================================================== */

#ifndef __SYNFIG_TARGET_CAIRO_H

#define __SYNFIG_TARGET_CAIRO_H

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

#include "target.h"

#include "cairo.h"

/* === M A C R O S ========================================================= */

/* === T Y P E D E F S ===================================================== */

/* === C L A S S E S & S T R U C T S ======================================= */

namespace synfig {

class CairoSurface;

/*!	\class Target_Cairo

**	\brief This is a Target class that implements the render function

**     for a CairoSurface

*/

class Target_Cairo : public Target

{

	//! Number of threads to use

	// int threads_;

public:

	typedef etl::handle<target_cairo> Handle;</target_cairo>

	typedef etl::loose_handle<target_cairo> LooseHandle;</target_cairo>

	typedef etl::handle<const target_cairo=""> ConstHandle;</const>

	//! Default constructor (current frame = 0)

	Target_Cairo();

	//! Renders the canvas to the target

	virtual bool render(ProgressCallback *cb=NULL);

	//! Obtain a surface pointer based on the render method

	//! this function has to be overrrided by the derived targets 

	//! to create the proper Cairo backend surface for each target type.

	virtual bool obtain_surface(cairo_surface_t*&)=0; 

	//! Returns the number of peniding frames to render. If it is zero it

	//! stops rendering frames.

	virtual int next_frame(Time& time);

	//! Puts the rendered surface onto the target.

	virtual bool put_surface(cairo_surface_t *surface, ProgressCallback *cb=NULL);

	//! Filters the cairo surface based on gamma

	static void gamma_filter(cairo_surface_t* surface, const synfig::Gamma &gamma);

private:

}; // END of class Target_Cairo

}; // END of namespace synfig

/* === E N D =============================================================== */

#endif