+/* === S Y N F I G ========================================================= */
+/*! \file xorpattern.cpp
+** \brief Template Header
+**
+** $Id$
+**
+** \legal
+** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 2007 Chris Moore
+**
+** 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
+**
+** === N O T E S ===========================================================
+**
+** ========================================================================= */
+
+/* === H E A D E R S ======================================================= */
+
+#ifdef USING_PCH
+# include "pch.h"
+#else
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "xorpattern.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>
+
+#endif
+
+/* === M A C R O S ========================================================= */
+
+/* === G L O B A L S ======================================================= */
+
+SYNFIG_LAYER_INIT(XORPattern);
+SYNFIG_LAYER_SET_NAME(XORPattern,"xor_pattern");
+SYNFIG_LAYER_SET_LOCAL_NAME(XORPattern,_("XOR Pattern"));
+SYNFIG_LAYER_SET_CATEGORY(XORPattern,_("Other"));
+SYNFIG_LAYER_SET_VERSION(XORPattern,"0.1");
+SYNFIG_LAYER_SET_CVS_ID(XORPattern,"$Id$");
+
+/* === P R O C E D U R E S ================================================= */
+
+/* === M E T H O D S ======================================================= */
+
+XORPattern::XORPattern():
+ Layer_Composite (1.0,Color::BLEND_STRAIGHT),
+ pos(0.125,0.125),
+ size(0.25,0.25)
+{
+}
+
+bool
+XORPattern::set_param(const String & param, const ValueBase &value)
+{
+ IMPORT(pos);
+ IMPORT(size);
+
+ return Layer_Composite::set_param(param,value);
+}
+
+ValueBase
+XORPattern::get_param(const String & param)const
+{
+ EXPORT(pos);
+ EXPORT(size);
+
+ EXPORT_NAME();
+ EXPORT_VERSION();
+
+ return Layer_Composite::get_param(param);
+}
+
+Color
+XORPattern::get_color(Context context, const Point &point)const
+{
+ if(get_amount()==0.0)
+ return context.get_color(point);
+
+ unsigned int a=(unsigned int)floor((point[0]-pos[0])/size[0]), b=(unsigned int)floor((point[1]-pos[1])/size[1]);
+ unsigned char rindex=(a^b);
+ unsigned char gindex=(a^(~b))*4;
+ unsigned char bindex=~(a^b)*2;
+
+ Color color((Color::value_type)rindex/(Color::value_type)255.0,
+ (Color::value_type)gindex/(Color::value_type)255.0,
+ (Color::value_type)bindex/(Color::value_type)255.0,
+ 1.0);
+
+ if(get_amount() == 1 && get_blend_method() == Color::BLEND_STRAIGHT)
+ return color;
+ else
+ return Color::blend(color,context.get_color(point),get_amount(),get_blend_method());
+
+}
+
+Layer::Vocab
+XORPattern::get_param_vocab()const
+{
+ Layer::Vocab ret(Layer_Composite::get_param_vocab());
+
+ ret.push_back(ParamDesc("pos")
+ .set_local_name(_("Offset"))
+ );
+ ret.push_back(ParamDesc("size")
+ .set_local_name(_("Size"))
+ .set_origin("pos")
+ );
+
+ return ret;
+}
+
+synfig::Layer::Handle
+XORPattern::hit_check(synfig::Context context, const synfig::Point &getpos)const
+{
+ // if we have a zero amount
+ if(get_amount()==0.0)
+ // then the click passes down to our context
+ return context.hit_check(getpos);
+
+ synfig::Layer::Handle tmp;
+ // if we are behind the context, and the click hits something in the context
+ if(get_blend_method()==Color::BLEND_BEHIND && (tmp=context.hit_check(getpos)))
+ // then return the thing it hit in the context
+ return tmp;
+
+ // if we're using an 'onto' blend method and the click missed the context
+ if(Color::is_onto(get_blend_method()) && !(tmp=context.hit_check(getpos)))
+ // then it misses everything
+ return 0;
+
+ // otherwise the click hit us, since we're the size of the whole plane
+ return const_cast<XORPattern*>(this);
+}