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

/*!	\file synfig/rendering/common/task/taskpixelprocessor.h

**	\brief TaskPixelProcessor Header

**

**	$Id$

**

**	\legal

**	......... ... 2016-2018 Ivan Mahonin

**

**	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_RENDERING_TASKPIXELPROCESSOR_H

#define __SYNFIG_RENDERING_TASKPIXELPROCESSOR_H

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

#include <synfig color="" colormatrix.h=""></synfig>

#include "../../task.h"

#include "tasktransformation.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

{

namespace rendering

{

class TaskPixelProcessor: public Task,

	public TaskInterfaceTransformationPass,

	public TaskInterfaceConstant,

	public TaskInterfaceSplit

{

public:

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

	static Token token;

	virtual Token::Handle get_token() const { return token.handle(); }

	const Task::Handle& sub_task() const { return Task::sub_task(0); }

	Task::Handle& sub_task() { return Task::sub_task(0); }

	VectorInt get_offset() const;

	virtual Rect calc_bounds() const;

	virtual int get_pass_subtask_index() const

	{

		if (is_zero())

			return PASSTO_NO_TASK;

		if (!is_affects_transparent() && !sub_task())

			return PASSTO_NO_TASK;

		if (is_transparent())

			return sub_task() ? 0 : PASSTO_NO_TASK;

		if (is_constant())

			return PASSTO_THIS_TASK_WITHOUT_SUBTASKS;

		return PASSTO_THIS_TASK;

	}

	virtual bool is_zero() const

		{ return false; }

	virtual bool is_transparent() const

		{ return false; }

	virtual bool is_constant() const

		{ return false; }

	virtual bool is_affects_transparent() const

		{ return false; }

};

class TaskPixelGamma: public TaskPixelProcessor

{

public:

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

	static Token token;

	virtual Token::Handle get_token() const { return token.handle(); }

	Gamma gamma;

	TaskPixelGamma() { }

	virtual bool is_transparent() const

	{

		return approximate_equal_lp(gamma.get_r(), ColorReal(1.0))

			&& approximate_equal_lp(gamma.get_g(), ColorReal(1.0))

			&& approximate_equal_lp(gamma.get_b(), ColorReal(1.0));

	}

};

class TaskPixelColorMatrix: public TaskPixelProcessor

{

public:

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

	static Token token;

	virtual Token::Handle get_token() const { return token.handle(); }

	ColorMatrix matrix;

	virtual bool is_zero() const

		{ return matrix.is_transparent(); }

	virtual bool is_transparent() const

		{ return matrix.is_identity(); }

	virtual bool is_constant() const

		{ return matrix.is_constant(); }

	virtual bool is_affects_transparent() const

		{ return matrix.is_affects_transparent(); }

};

} /* end namespace rendering */

} /* end namespace synfig */

/* -- E N D ----------------------------------------------------------------- */

#endif