1 /* === S Y N F I G ========================================================= */
3 ** \brief Implementation of the "Time Loop" layer
8 ** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
9 ** Copyright (c) 2007, 2008 Chris Moore
11 ** This package is free software; you can redistribute it and/or
12 ** modify it under the terms of the GNU General Public License as
13 ** published by the Free Software Foundation; either version 2 of
14 ** the License, or (at your option) any later version.
16 ** This package is distributed in the hope that it will be useful,
17 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ** General Public License for more details.
22 ** === N O T E S ===========================================================
24 ** ========================================================================= */
26 /* === H E A D E R S ======================================================= */
36 #include <synfig/valuenode.h>
37 #include <synfig/valuenode_const.h>
38 #include <synfig/valuenode_subtract.h>
39 #include <synfig/time.h>
40 #include <synfig/context.h>
41 #include <synfig/paramdesc.h>
42 #include <synfig/renddesc.h>
43 #include <synfig/value.h>
47 using namespace synfig;
51 /* === M A C R O S ========================================================= */
53 /* === G L O B A L S ======================================================= */
55 SYNFIG_LAYER_INIT(Layer_TimeLoop);
56 SYNFIG_LAYER_SET_NAME(Layer_TimeLoop,"timeloop");
57 SYNFIG_LAYER_SET_LOCAL_NAME(Layer_TimeLoop,N_("Time Loop"));
58 SYNFIG_LAYER_SET_CATEGORY(Layer_TimeLoop,N_("Other"));
59 SYNFIG_LAYER_SET_VERSION(Layer_TimeLoop,"0.2");
60 SYNFIG_LAYER_SET_CVS_ID(Layer_TimeLoop,"$Id$");
62 /* === P R O C E D U R E S ================================================= */
64 /* === M E T H O D S ======================================================= */
66 Layer_TimeLoop::Layer_TimeLoop()
69 only_for_positive_duration=false;
74 Layer::Vocab voc(get_param_vocab());
75 Layer::fill_static(voc);
78 Layer_TimeLoop::~Layer_TimeLoop()
83 Layer_TimeLoop::set_param(const String & param, const ValueBase &value)
95 IMPORT(only_for_positive_duration);
99 return Layer::set_param(param,value);
103 Layer_TimeLoop::get_param(const String & param)const
108 EXPORT(only_for_positive_duration);
113 return Layer::get_param(param);
117 Layer_TimeLoop::get_param_vocab()const
119 Layer::Vocab ret(Layer::get_param_vocab());
121 ret.push_back(ParamDesc("link_time")
122 .set_local_name(_("Link Time"))
123 .set_description(_("Start time of the loop for the cycled context"))
126 ret.push_back(ParamDesc("local_time")
127 .set_local_name(_("Local Time"))
128 .set_description(_("The time when the resulted loop starts"))
131 ret.push_back(ParamDesc("duration")
132 .set_local_name(_("Duration"))
133 .set_description(_("Lenght of the loop"))
136 ret.push_back(ParamDesc("only_for_positive_duration")
137 .set_local_name(_("Only For Positive Duration"))
138 .set_description(_("When checked will loop only positive durations"))
141 ret.push_back(ParamDesc("symmetrical")
142 .set_local_name(_("Symmetrical"))
143 .set_description(_("When checked, loops are mirrored centered at Local Time"))
150 Layer_TimeLoop::set_version(const String &ver)
159 Layer_TimeLoop::reset_version()
161 // if we're not converting from an old version of the layer, there's nothing to do
167 // these are the conversions to go from 0.1 to 0.2:
169 // local_time = start_time
170 // duration = end_time - start_time
171 // if (time < start_time)
172 // link_time = -duration : if we want to reproduce the old behaviour - do we?
176 // convert the static parameters
177 local_time = start_time;
178 duration = end_time - start_time;
179 only_for_positive_duration = true;
182 //! \todo layer version 0.1 acted differently before start_time was reached - possibly due to a bug
185 // convert the dynamic parameters
186 const DynamicParamList &dpl = dynamic_param_list();
188 // if neither start_time nor end_time are dynamic, there's nothing more to do
189 if (dpl.count("start_time") == 0 && dpl.count("end_time") == 0)
192 etl::rhandle<ValueNode> start_time_value_node, end_time_value_node;
193 LinkableValueNode* duration_value_node;
195 if (dpl.count("start_time"))
197 start_time_value_node = dpl.find("start_time")->second;
198 disconnect_dynamic_param("start_time");
201 start_time_value_node = ValueNode_Const::create(start_time);
203 if (dpl.count("end_time"))
205 end_time_value_node = dpl.find("end_time")->second;
206 disconnect_dynamic_param("end_time");
209 end_time_value_node = ValueNode_Const::create(end_time);
211 duration_value_node = ValueNode_Subtract::create(Time(0));
212 duration_value_node->set_link("lhs", end_time_value_node);
213 duration_value_node->set_link("rhs", start_time_value_node);
215 connect_dynamic_param("local_time", start_time_value_node);
216 connect_dynamic_param("duration", duration_value_node);
220 Layer_TimeLoop::set_time(Context context, Time t)const
224 if (!only_for_positive_duration || duration > 0)
228 else if (duration > 0)
231 t -= floor(t / duration) * duration;
237 t -= floor(t / -duration) * -duration;
241 // for compatibility with v0.1 layers; before local_time is reached, take a step back
242 if (!symmetrical && time < local_time)
250 Layer_TimeLoop::get_color(Context context, const Point &pos)const
252 return context.get_color(pos);
256 Layer_TimeLoop::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
258 return context.accelerated_render(surface,quality,renddesc,cb);