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/*
* Copyright © 2010 Yuvaraj Pandian T <yuvipanda@yuvi.in>
* Copyright © 2010 daniel g. siegel <dgsiegel@gnome.org>
* Copyright © 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
*
* Licensed under the GNU General Public License Version 2
*
* This program 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 program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
using GLib;
internal class Cheese.EffectsManager : GLib.Object
{
public List<Effect> effects;
public EffectsManager ()
{
effects = new List<Effect> ();
}
/**
* Add the effects into the manager.
*/
public void load_effects ()
{
var loaded_effects = Cheese.Effect.load_effects ();
var effects_hash = new HashTable<string, Effect> (str_hash, str_equal);
foreach (var effect in loaded_effects)
{
effects_hash.insert (effect.name, effect);
}
effects_hash.foreach (add_effect);
/* Add identity effect as the first in the effect list. */
if (effects.length () > 0)
{
/* Translators: a description of an effect (to be applied to images
* from the webcam) which does nothing. */
Effect e = new Effect (_("No Effect"), "identity");
effects.prepend (e);
}
}
/**
* Add an effect into the manager. Used as a HFunc.
*/
private void add_effect (string name, Effect effect)
{
effects.insert_sorted (effect, sort_value);
}
/**
* Search for and return the requested effect.
*
* @param name the name of the effect to search for
* @return the effect which matches the supplied name, or null
*/
public Effect ? get_effect (string name)
{
foreach (var effect in effects)
{
if (effect.name == name)
return effect;
}
return null;
}
/**
* Compare two effects by the pipeline description.
*
* @param a an effect to compare against
* @param b another effect to compare against
* @return true if the effects are the same, false otherwise
*/
private static bool cmp_value (Effect a, Effect b)
{
return a.pipeline_desc == b.pipeline_desc;
}
/**
* A sort function for effects
*
* @param a an effect to sort against
* @param b another effect to sort against
* @return -1 if a is less than b, 0 if the effects are the same and 1 if a
* is greater than b
*/
private static int sort_value (Effect a, Effect b)
{
if (a.name.down () < b.name.down ())
return -1;
else if (a.name.down () > b.name.down ())
return 1;
else
return 0;
}
}
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