/* === S Y N F I G ========================================================= */
/*! \file zoom.cpp
** \brief Implementation of the "Zoom" layer, aka "Scale"
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2012-2013 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 "zoom.h"
#include <synfig/rendering/common/task/tasktransformation.h>
#include <synfig/rendering/primitive/transformationaffine.h>
#endif
using namespace std;
using namespace etl;
using namespace synfig;
using namespace modules;
using namespace lyr_std;
/* === M A C R O S ========================================================= */
/* === G L O B A L S ======================================================= */
SYNFIG_LAYER_INIT(Zoom);
SYNFIG_LAYER_SET_NAME(Zoom,"zoom");
SYNFIG_LAYER_SET_LOCAL_NAME(Zoom,N_("Scale"));
SYNFIG_LAYER_SET_CATEGORY(Zoom,N_("Transform"));
SYNFIG_LAYER_SET_VERSION(Zoom,"0.1");
SYNFIG_LAYER_SET_CVS_ID(Zoom,"$Id$");
/* === 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 ================================================= */
Zoom::Zoom():
param_center(ValueBase(Vector(0,0))),
param_amount(ValueBase(Real(0)))
{
SET_INTERPOLATION_DEFAULTS();
SET_STATIC_DEFAULTS();
}
bool
Zoom::set_param(const String & param, const ValueBase &value)
{
IMPORT_VALUE(param_center);
IMPORT_VALUE(param_amount);
return false;
}
ValueBase
Zoom::get_param(const String ¶m)const
{
EXPORT_VALUE(param_center);
EXPORT_VALUE(param_amount);
EXPORT_NAME();
EXPORT_VERSION();
return ValueBase();
}
Layer::Vocab
Zoom::get_param_vocab()const
{
Layer::Vocab ret;
ret.push_back(ParamDesc("amount")
.set_local_name(_("Amount"))
.set_description(_("Amount to scale to"))
.set_origin("center")
.set_exponential()
);
ret.push_back(ParamDesc("center")
.set_local_name(_("Origin"))
.set_description(_("Point to scale from"))
);
return ret;
}
Layer::Handle
Zoom::hit_check(Context context, const Point &pos)const
{
Vector center=param_center.get(Vector());
return context.hit_check((pos-center)/exp(param_amount.get(Real()))+center);
}
Color
Zoom::get_color(Context context, const Point &pos)const
{
Vector center=param_center.get(Vector());
return context.get_color((pos-center)/exp(param_amount.get(Real()))+center);
}
class lyr_std::Zoom_Trans : public Transform
{
etl::handle<const Zoom> layer;
public:
Zoom_Trans(const Zoom* x):Transform(x->get_guid()),layer(x) { }
Vector perform(const Vector& x)const
{
Vector center=layer->param_center.get(Vector());
Real amount=layer->param_amount.get(Real());
return (x-center)*exp(amount)+center;
}
Vector unperform(const Vector& x)const
{
Vector center=layer->param_center.get(Vector());
Real amount=layer->param_amount.get(Real());
return (x-center)/exp(amount)+center;
}
String get_string()const
{
return "zoom";
}
};
etl::handle<Transform>
Zoom::get_transform()const
{
return new Zoom_Trans(this);
}
Rect
Zoom::get_full_bounding_rect(Context context)const
{
Vector center=param_center.get(Vector());
return (context.get_full_bounding_rect()-center)*exp(param_amount.get(Real()))+center;
}
rendering::Task::Handle
Zoom::build_rendering_task_vfunc(Context context)const
{
Real amount=param_amount.get(Real());
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(exp(amount))
* Matrix().set_translate(-center);
task_transformation->sub_task() = context.build_rendering_task();
return task_transformation;
}