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

/*!	\file lumakey.cpp

**	\brief Implementation of the "Luma Key" layer

**

**	$Id$

**

**	\legal

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

**	Copyright (c) 2007 Chris Moore

**	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

*/

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

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

#ifdef USING_PCH

#	include "pch.h"

#else

#ifdef HAVE_CONFIG_H

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

#endif

#include "lumakey.h"

#include <synfig localization.h=""></synfig>

#include <synfig general.h=""></synfig>

#include <synfig string.h=""></synfig>

#include <synfig time.h=""></synfig>

#include <synfig context.h=""></synfig>

#include <synfig paramdesc.h=""></synfig>

#include <synfig renddesc.h=""></synfig>

#include <synfig surface.h=""></synfig>

#include <synfig value.h=""></synfig>

#include <synfig valuenode.h=""></synfig>

#include <synfig segment.h=""></synfig>

#include <synfig cairo_renddesc.h=""></synfig>

#endif

using namespace synfig;

using namespace std;

using namespace etl;

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

/* === G L O B A L S ======================================================= */

SYNFIG_LAYER_INIT(LumaKey);

SYNFIG_LAYER_SET_NAME(LumaKey,"lumakey");

SYNFIG_LAYER_SET_LOCAL_NAME(LumaKey,N_("Luma Key"));

SYNFIG_LAYER_SET_CATEGORY(LumaKey,N_("Filters"));

SYNFIG_LAYER_SET_VERSION(LumaKey,"0.1");

SYNFIG_LAYER_SET_CVS_ID(LumaKey,"$Id$");

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

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

LumaKey::LumaKey():

	Layer_CompositeFork(1.0,Color::BLEND_STRAIGHT)

{

	set_blend_method(Color::BLEND_STRAIGHT);

}

bool

LumaKey::set_param(const String ¶m, const ValueBase &value)

{

	return Layer_Composite::set_param(param,value);

}

ValueBase

LumaKey::get_param(const String ¶m)const

{

	EXPORT_NAME();

	EXPORT_VERSION();

	return Layer_Composite::get_param(param);

}

Layer::Vocab

LumaKey::get_param_vocab()const

{

	Layer::Vocab ret(Layer_Composite::get_param_vocab());

/*	ret.push_back(ParamDesc("color")

		.set_local_name(_("Color"))

		.set_description(_("Color of checkers"))

	);

	ret.push_back(ParamDesc("pos")

		.set_local_name(_("Offset"))

	);

	ret.push_back(ParamDesc("size")

		.set_local_name(_("Size"))

		.set_description(_("Size of checkers"))

		.set_origin("pos")

	);

*/

	return ret;

}

synfig::Layer::Handle

LumaKey::hit_check(synfig::Context context, const synfig::Point &getpos)const

{

	return context.hit_check(getpos);

}

Color

LumaKey::get_color(Context context, const Point &getpos)const

{

	const Color color(context.get_color(getpos));

	if(get_amount()==0.0)

		return color;

	Color ret(color);

	ret.set_a(ret.get_y()*ret.get_a());

	ret.set_y(1);

	if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)

		return ret;

	return Color::blend(ret,color,get_amount(),get_blend_method());

}

bool

LumaKey::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const

{

	RENDER_TRANSFORMED_IF_NEED(__FILE__, __LINE__)

	SuperCallback supercb(cb,0,9500,10000);

	if(!context.accelerated_render(surface,quality,renddesc,&supercb))

		return false;

	int x,y;

	Surface::pen pen(surface->begin());

	for(y=0;y

		for(x=0;x

		{

			Color tmp(pen.get_value());

			tmp.set_a(tmp.get_y()*tmp.get_a());

			tmp.set_y(1);

			pen.put_value(tmp);

		}

	// Mark our progress as finished

	if(cb && !cb->amount_complete(10000,10000))

		return false;

	return true;

}

////

bool

LumaKey::accelerated_cairorender(Context context, cairo_t *cr, int quality, const RendDesc &renddesc_, ProgressCallback *cb)const

{

	RendDesc	renddesc(renddesc_);

	// Untransform the render desc

	if(!cairo_renddesc_untransform(cr, renddesc))

		return false;

	const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());

	const Point tl(renddesc.get_tl());

	const int w(renddesc.get_w());

	const int h(renddesc.get_h());

	SuperCallback supercb(cb,0,9500,10000);

	if(get_amount()==0)

		return true;

	cairo_surface_t *surface;

	surface=cairo_surface_create_similar(cairo_get_target(cr), CAIRO_CONTENT_COLOR_ALPHA, w, h);

	cairo_t* subcr=cairo_create(surface);

	cairo_scale(subcr, 1/pw, 1/ph);

	cairo_translate(subcr, -tl[0], -tl[1]);

	if(!context.accelerated_cairorender(subcr,quality,renddesc,&supercb))

	{

		if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Cairo Renderer Failure",__LINE__));

		return false;

	}

	cairo_destroy(subcr);

	int x,y;

	CairoSurface cairosurface(surface);

	if(!cairosurface.map_cairo_image())

	{

		synfig::info("map cairo image failed");

		return false;

	}

	CairoSurface::pen pen(cairosurface.begin());

	for(y=0;y

		for(x=0;x

		{

			Color tmp(Color(pen.get_value().demult_alpha()));

			tmp.set_a(tmp.get_y()*tmp.get_a());

			tmp.set_y(1);

			pen.put_value(CairoColor(tmp.clamped()).premult_alpha());

		}

	cairosurface.unmap_cairo_image();

	// paint surface on cr

	cairo_save(cr);

	cairo_translate(cr, tl[0], tl[1]);

	cairo_scale(cr, pw, ph);

	cairo_set_source_surface(cr, surface, 0, 0);

	cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);

	cairo_paint(cr);

	cairo_restore(cr);

	// Mark our progress as finished

	if(cb && !cb->amount_complete(10000,10000))

		return false;

	return true;

}

////

Rect

LumaKey::get_bounding_rect(Context context)const

{

	if(is_disabled())

		return Rect::zero();

	return context.get_full_bounding_rect();

}

rendering::Task::Handle

LumaKey::build_rendering_task_vfunc(Context context) const

	{ return Layer::build_rendering_task_vfunc(context); }