--- /dev/null
+/* === S Y N F I G ========================================================= */
+/*! \file twirl.cpp
+** \brief Implementation of the "Twirl" layer
+**
+** $Id$
+**
+** \legal
+** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**
+** 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/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 "twirl.h"
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace etl;
+using namespace std;
+using namespace synfig;
+
+/* === G L O B A L S ======================================================= */
+
+SYNFIG_LAYER_INIT(Twirl);
+SYNFIG_LAYER_SET_NAME(Twirl,"twirl");
+SYNFIG_LAYER_SET_LOCAL_NAME(Twirl,N_("Twirl"));
+SYNFIG_LAYER_SET_CATEGORY(Twirl,N_("Distortions"));
+SYNFIG_LAYER_SET_VERSION(Twirl,"0.1");
+SYNFIG_LAYER_SET_CVS_ID(Twirl,"$Id$");
+
+/* === 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 ================================================= */
+
+Twirl::Twirl():
+ Layer_Composite(1.0,Color::BLEND_STRAIGHT),
+ center(0,0),
+ radius(1.0),
+ rotations(Angle::zero()),
+ distort_inside(true),
+ distort_outside(false)
+{
+}
+
+bool
+Twirl::set_param(const String & param, const ValueBase &value)
+{
+ IMPORT(center);
+ IMPORT(radius);
+ IMPORT(rotations);
+ IMPORT(distort_inside);
+ IMPORT(distort_outside);
+
+ return Layer_Composite::set_param(param,value);
+}
+
+ValueBase
+Twirl::get_param(const String ¶m)const
+{
+ EXPORT(center);
+ EXPORT(radius);
+ EXPORT(rotations);
+ EXPORT(distort_inside);
+ EXPORT(distort_outside);
+
+ EXPORT_NAME();
+ EXPORT_VERSION();
+
+ return false;
+}
+
+Layer::Vocab
+Twirl::get_param_vocab()const
+{
+ Layer::Vocab ret;
+
+ ret.push_back(ParamDesc("center")
+ .set_local_name(_("Center"))
+ );
+
+ ret.push_back(ParamDesc("radius")
+ .set_local_name(_("Radius"))
+ .set_description(_("This is the radius of the circle"))
+ .set_is_distance()
+ .set_origin("center")
+ );
+
+ ret.push_back(ParamDesc("rotations")
+ .set_local_name(_("Rotations"))
+ .set_origin("center")
+ );
+
+ ret.push_back(ParamDesc("distort_inside")
+ .set_local_name(_("Distort Inside"))
+ );
+
+ ret.push_back(ParamDesc("distort_outside")
+ .set_local_name(_("Distort Outside"))
+ );
+
+ return ret;
+}
+
+synfig::Point
+Twirl::distort(const synfig::Point &pos,bool reverse)const
+{
+ Point centered(pos-center);
+ Real mag(centered.mag());
+
+ Angle a;
+
+ if((distort_inside || mag>radius) && (distort_outside || mag<radius))
+ a=rotations*((centered.mag()-radius)/radius);
+ else
+ return pos;
+
+ if(reverse) a=-a;
+
+ const Real sin(Angle::sin(a).get());
+ const Real cos(Angle::cos(a).get());
+
+ Point twirled;
+ twirled[0]=cos*centered[0]-sin*centered[1];
+ twirled[1]=sin*centered[0]+cos*centered[1];
+
+ return twirled+center;
+}
+
+synfig::Layer::Handle
+Twirl::hit_check(synfig::Context context, const synfig::Point &pos)const
+{
+ return context.hit_check(distort(pos));
+}
+
+Color
+Twirl::get_color(Context context, const Point &pos)const
+{
+ return context.get_color(distort(pos));
+}
+
+class Twirl_Trans : public Transform
+{
+ etl::handle<const Twirl> layer;
+public:
+ Twirl_Trans(const Twirl* x):Transform(x->get_guid()),layer(x) { }
+
+ synfig::Vector perform(const synfig::Vector& x)const
+ {
+ return layer->distort(x,true);
+ }
+
+ synfig::Vector unperform(const synfig::Vector& x)const
+ {
+ return layer->distort(x,false);
+ }
+};
+etl::handle<Transform>
+Twirl::get_transform()const
+{
+ return new Twirl_Trans(this);
+}
+
+/*
+bool
+Twirl::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+ SuperCallback supercb(cb,0,9500,10000);
+
+ if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
+ {
+ surface->set_wh(renddesc.get_w(),renddesc.get_h());
+ }
+ else
+ {
+ if(!context.accelerated_render(surface,quality,renddesc,&supercb))
+ return false;
+ if(get_amount()==0)
+ return true;
+ }
+
+
+ int x,y;
+
+ Surface::pen pen(surface->begin());
+ const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
+ Point pos;
+ Point tl(renddesc.get_tl());
+ const int w(surface->get_w());
+ const int h(surface->get_h());
+
+ if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
+ {
+ for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
+ for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
+ pen.put_value(color_func(pos));
+ }
+ else
+ {
+ for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
+ for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
+ pen.put_value(Color::blend(color_func(pos),pen.get_value(),get_amount(),get_blend_method()));
+ }
+
+ // Mark our progress as finished
+ if(cb && !cb->amount_complete(10000,10000))
+ return false;
+
+ return true;
+}
+*/
projects / synfig.git / blobdiff