/* === S Y N F I G ========================================================= */
/*! \file stretch.cpp
** \brief Implementation of the "Stretch" layer
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2007 Chris Moore
** Copyright (c) 2011-2013 Carlos López
**
** 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>
#endif
#include <synfig/localization.h>
#include <synfig/general.h>
#include <synfig/string.h>
#include <synfig/time.h>
#include <synfig/context.h>
#include <synfig/paramdesc.h>
#include <synfig/renddesc.h>
#include <synfig/surface.h>
#include <synfig/value.h>
#include <synfig/valuenode.h>
#include <synfig/transform.h>
#include "stretch.h"
#include <synfig/rendering/common/task/tasktransformation.h>
#include <synfig/rendering/primitive/transformationaffine.h>
#endif
/* === U S I N G =========================================================== */
using namespace std;
using namespace etl;
using namespace synfig;
using namespace modules;
using namespace lyr_std;
/* === G L O B A L S ======================================================= */
SYNFIG_LAYER_INIT(Layer_Stretch);
SYNFIG_LAYER_SET_NAME(Layer_Stretch,"stretch");
SYNFIG_LAYER_SET_LOCAL_NAME(Layer_Stretch,N_("Stretch"));
SYNFIG_LAYER_SET_CATEGORY(Layer_Stretch,N_("Distortions"));
SYNFIG_LAYER_SET_VERSION(Layer_Stretch,"0.1");
SYNFIG_LAYER_SET_CVS_ID(Layer_Stretch,"$Id$");
/* === P R O C E D U R E S ================================================= */
/* === M E T H O D S ======================================================= */
/* === E N T R Y P O I N T ================================================= */
Layer_Stretch::Layer_Stretch():
param_amount(ValueBase(Point(1,1))),
param_center(ValueBase(Point(0,0)))
{
SET_INTERPOLATION_DEFAULTS();
SET_STATIC_DEFAULTS();
}
bool
Layer_Stretch::set_param(const String & param, const ValueBase &value)
{
IMPORT_VALUE(param_amount);
IMPORT_VALUE(param_center);
return false;
}
ValueBase
Layer_Stretch::get_param(const String ¶m)const
{
EXPORT_VALUE(param_amount);
EXPORT_VALUE(param_center);
EXPORT_NAME();
EXPORT_VERSION();
return ValueBase();
}
Layer::Vocab
Layer_Stretch::get_param_vocab()const
{
Layer::Vocab ret;
ret.push_back(ParamDesc("amount")
.set_local_name(_("Amount"))
.set_origin("center")
.set_description(_("Size of the stretch relative to its Center"))
);
ret.push_back(ParamDesc("center")
.set_local_name(_("Center"))
.set_description(_("Where the stretch distortion is centered"))
);
return ret;
}
Layer::Handle
Layer_Stretch::hit_check(Context context, const Point &pos)const
{
Vector amount=param_amount.get(Vector());
Point center=param_center.get(Point());
Point npos(pos);
npos[0]=(npos[0]-center[0])/amount[0]+center[0];
npos[1]=(npos[1]-center[1])/amount[1]+center[1];
return context.hit_check(npos);
}
Color
Layer_Stretch::get_color(Context context, const Point &pos)const
{
Vector amount=param_amount.get(Vector());
Point center=param_center.get(Point());
Point npos(pos);
npos[0]=(npos[0]-center[0])/amount[0]+center[0];
npos[1]=(npos[1]-center[1])/amount[1]+center[1];
return context.get_color(npos);
}
class lyr_std::Stretch_Trans : public Transform
{
etl::handle<const Layer_Stretch> layer;
public:
Stretch_Trans(const Layer_Stretch* x):Transform(x->get_guid()),layer(x) { }
Vector perform(const Vector& x)const
{
Vector amount=layer->param_amount.get(Vector());
Point center=layer->param_center.get(Point());
return Vector((x[0]-center[0])*amount[0]+center[0],
(x[1]-center[1])*amount[1]+center[1]);
}
Vector unperform(const Vector& x)const
{
Vector amount=layer->param_amount.get(Vector());
Point center=layer->param_center.get(Point());
return Vector((x[0]-center[0])/amount[0]+center[0],
(x[1]-center[1])/amount[1]+center[1]);
}
String get_string()const
{
return "stretch";
}
};
etl::handle<Transform>
Layer_Stretch::get_transform()const
{
return new Stretch_Trans(this);
}
Rect
Layer_Stretch::get_full_bounding_rect(Context context)const
{
Vector amount=param_amount.get(Vector());
Point center=param_center.get(Point());
Rect rect(context.get_full_bounding_rect());
Point min(rect.get_min()), max(rect.get_max());
return Rect(Point((min[0]-center[0])*amount[0]+center[0],
(min[1]-center[1])*amount[1]+center[1]),
Point((max[0]-center[0])*amount[0]+center[0],
(max[1]-center[1])*amount[1]+center[1]));
}
rendering::Task::Handle
Layer_Stretch::build_rendering_task_vfunc(Context context)const
{
Vector amount=param_amount.get(Vector());
Point center=param_center.get(Point());
rendering::TaskTransformationAffine::Handle task_transformation(new rendering::TaskTransformationAffine());
task_transformation->transformation->matrix =
Matrix().set_translate(center)
* Matrix().set_scale(amount)
* Matrix().set_translate(-center);
task_transformation->sub_task() = context.build_rendering_task();
return task_transformation;
}