-/*! ========================================================================
-** Synfig
-** Template File
-** $Id: lineargradient.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $
+/* === S Y N F I G ========================================================= */
+/*! \file lineargradient.cpp
+** \brief Implementation of the "Linear Gradient" layer
**
+** $Id$
+**
+** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**
** This package is free software; you can redistribute it and/or
** 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 ===========================================================
**
SYNFIG_LAYER_INIT(LinearGradient);
SYNFIG_LAYER_SET_NAME(LinearGradient,"linear_gradient");
-SYNFIG_LAYER_SET_LOCAL_NAME(LinearGradient,_("Linear Gradient"));
-SYNFIG_LAYER_SET_CATEGORY(LinearGradient,_("Gradients"));
+SYNFIG_LAYER_SET_LOCAL_NAME(LinearGradient,N_("Linear Gradient"));
+SYNFIG_LAYER_SET_CATEGORY(LinearGradient,N_("Gradients"));
SYNFIG_LAYER_SET_VERSION(LinearGradient,"0.0");
-SYNFIG_LAYER_SET_CVS_ID(LinearGradient,"$Id: lineargradient.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $");
+SYNFIG_LAYER_SET_CVS_ID(LinearGradient,"$Id$");
/* === P R O C E D U R E S ================================================= */
LinearGradient::color_func(const Point &point, float supersample)const
{
Real dist(point*diff-p1*diff);
-
+
if(loop)
dist-=floor(dist);
-
+
if(zigzag)
{
dist*=2.0;
{
if(dist+supersample*0.5>1.0)
{
- Color pool(gradient(dist,supersample*0.5).premult_alpha()*(1.0-(dist-supersample*0.5)));
- pool+=gradient((dist+supersample*0.5)-1.0,supersample*0.5).premult_alpha()*((dist+supersample*0.5)-1.0);
+ float left(supersample*0.5-(dist-1.0));
+ float right(supersample*0.5+(dist-1.0));
+ Color pool(gradient(1.0-(left*0.5),left).premult_alpha()*left/supersample);
+ if (zigzag) pool+=gradient(1.0-right*0.5,right).premult_alpha()*right/supersample;
+ else pool+=gradient(right*0.5,right).premult_alpha()*right/supersample;
return pool.demult_alpha();
}
if(dist-supersample*0.5<0.0)
{
- Color pool(gradient(dist,supersample*0.5).premult_alpha()*(dist+supersample*0.5));
- pool+=gradient(1.0-(dist-supersample*0.5),supersample*0.5).premult_alpha()*(-(dist-supersample*0.5));
+ float left(supersample*0.5-dist);
+ float right(supersample*0.5+dist);
+ Color pool(gradient(right*0.5,right).premult_alpha()*right/supersample);
+ if (zigzag) pool+=gradient(left*0.5,left).premult_alpha()*left/supersample;
+ else pool+=gradient(1.0-left*0.5,left).premult_alpha()*left/supersample;
return pool.demult_alpha();
}
}
}
float
-LinearGradient::calc_supersample(const synfig::Point &x, float pw,float ph)const
+LinearGradient::calc_supersample(const synfig::Point &/*x*/, float pw,float /*ph*/)const
{
return pw/(p2-p1).mag();
}
bool
LinearGradient::set_param(const String & param, const ValueBase &value)
{
- if(param=="p1" && value.same_as(p1))
+ if(param=="p1" && value.same_type_as(p1))
{
p1=value.get(p1);
sync();
return true;
}
- if(param=="p2" && value.same_as(p2))
+ if(param=="p2" && value.same_type_as(p2))
{
p2=value.get(p2);
sync();
}
//IMPORT(p1);
//IMPORT(p2);
-
-
+
+
IMPORT(gradient);
IMPORT(loop);
IMPORT(zigzag);
- return Layer_Composite::set_param(param,value);
+ return Layer_Composite::set_param(param,value);
}
ValueBase
EXPORT(gradient);
EXPORT(loop);
EXPORT(zigzag);
-
+
EXPORT_NAME();
EXPORT_VERSION();
-
- return Layer_Composite::get_param(param);
+
+ return Layer_Composite::get_param(param);
}
Layer::Vocab
LinearGradient::get_param_vocab()const
{
Layer::Vocab ret(Layer_Composite::get_param_vocab());
-
+
ret.push_back(ParamDesc("p1")
.set_local_name(_("Point 1"))
.set_connect("p2")
ret.push_back(ParamDesc("zigzag")
.set_local_name(_("ZigZag"))
);
-
+
return ret;
}
return true;
}
-
+
int x,y;
Surface::pen pen(surface->begin());
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)