+++ /dev/null
-/* === 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
-** 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 "lineargradient.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(LinearGradient);
-SYNFIG_LAYER_SET_NAME(LinearGradient,"linear_gradient");
-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,"$Id$");
-
-/* === P R O C E D U R E S ================================================= */
-
-/* === M E T H O D S ======================================================= */
-
-inline void
-LinearGradient::sync()
-{
- diff=(p2-p1);
- const Real mag(diff.inv_mag());
- diff*=mag*mag;
-}
-
-
-LinearGradient::LinearGradient():
- p1(1,1),
- p2(-1,-1),
- gradient(Color::black(), Color::white()),
- loop(false),
- zigzag(false)
-{
- sync();
-}
-
-inline Color
-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;
- supersample*=2.0;
- if(dist>1)dist=2.0-dist;
- }
-
- if(loop)
- {
- if(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)
- {
- 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();
- }
- }
- return gradient(dist,supersample);
-}
-
-float
-LinearGradient::calc_supersample(const synfig::Point &/*x*/, float pw,float /*ph*/)const
-{
- return pw/(p2-p1).mag();
-}
-
-synfig::Layer::Handle
-LinearGradient::hit_check(synfig::Context context, const synfig::Point &point)const
-{
- if(get_blend_method()==Color::BLEND_STRAIGHT && get_amount()>=0.5)
- return const_cast<LinearGradient*>(this);
- if(get_amount()==0.0)
- return context.hit_check(point);
- if((get_blend_method()==Color::BLEND_STRAIGHT || get_blend_method()==Color::BLEND_COMPOSITE) && color_func(point).get_a()>0.5)
- return const_cast<LinearGradient*>(this);
- return context.hit_check(point);
-}
-
-bool
-LinearGradient::set_param(const String & param, const ValueBase &value)
-{
- if(param=="p1" && value.same_type_as(p1))
- {
- p1=value.get(p1);
- sync();
- return true;
- }
- if(param=="p2" && value.same_type_as(p2))
- {
- p2=value.get(p2);
- sync();
- return true;
- }
- //IMPORT(p1);
- //IMPORT(p2);
-
-
- IMPORT(gradient);
- IMPORT(loop);
- IMPORT(zigzag);
- return Layer_Composite::set_param(param,value);
-}
-
-ValueBase
-LinearGradient::get_param(const String & param)const
-{
- EXPORT(p1);
- EXPORT(p2);
- EXPORT(gradient);
- EXPORT(loop);
- EXPORT(zigzag);
-
- EXPORT_NAME();
- EXPORT_VERSION();
-
- 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("p2")
- .set_local_name(_("Point 2"))
- );
- ret.push_back(ParamDesc("gradient")
- .set_local_name(_("Gradient"))
- );
- ret.push_back(ParamDesc("loop")
- .set_local_name(_("Loop"))
- );
- ret.push_back(ParamDesc("zigzag")
- .set_local_name(_("ZigZag"))
- );
-
- return ret;
-}
-
-Color
-LinearGradient::get_color(Context context, const Point &point)const
-{
- const Color color(color_func(point));
-
- if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
- return color;
- else
- return Color::blend(color,context.get_color(point),get_amount(),get_blend_method());
-}
-
-bool
-LinearGradient::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,calc_supersample(pos,pw,ph)));
- }
- 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,calc_supersample(pos,pw,ph)),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