+++ /dev/null
-/* === S Y N F I G ========================================================= */
-/*! \file halftone.cpp
-** \brief blehh
-**
-** $Id$
-**
-** \legal
-** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
-** Copyright (c) 2008 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
-*/
-/* ========================================================================= */
-
-/* === H E A D E R S ======================================================= */
-
-#ifdef USING_PCH
-# include "pch.h"
-#else
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include "halftone.h"
-
-#endif
-
-/* === M A C R O S ========================================================= */
-
-using namespace synfig;
-using namespace std;
-using namespace etl;
-
-/* === G L O B A L S ======================================================= */
-
-
-/* === P R O C E D U R E S ================================================= */
-
-#define SQRT2 (1.414213562f)
-
-/* === M E T H O D S ======================================================= */
-
-float
-Halftone::operator()(const Point &point, const float& luma, float supersample)const
-{
- float halftone(mask(point));
-
- if(supersample>=0.5f)
- supersample=0.4999999999f;
-
- halftone=(halftone-0.5f)*(1.0f-supersample*2.0f)+0.5f;
-
- const float diff(halftone-luma);
-
- if(supersample)
- {
- const float amount(diff/(supersample*2.0f)+0.5f);
-
- if(amount<=0.0f+0.01f)
- return 1.0f;
- else if(amount>=1.0f-0.01f)
- return 0.0f;
- else
- return 1.0f-amount;
- }
- else
- {
- if(diff>=0)
- return 0.0f;
- else
- return 1.0f;
- }
-
- return 0.0f;
-}
-
-float
-Halftone::mask(synfig::Point point)const
-{
- float radius1;
- float radius2;
-
- point-=origin;
-
- {
- const float a(Angle::sin(-angle).get()), b(Angle::cos(-angle).get());
- const float u(point[0]),v(point[1]);
-
- point[0]=b*u-a*v;
- point[1]=a*u+b*v;
- }
-
- if(type==TYPE_STRIPE)
- {
- Point pnt(fmod(point[0],size[0]),fmod(point[1],size[1]));
- while(pnt[0]<0)pnt[0]+=abs(size[0]);
- while(pnt[1]<0)pnt[1]+=abs(size[1]);
-
- float x(pnt[1]/size[1]);
- if(x>0.5)x=1.0-x;
- x*=2;
- return x;
- }
-
- {
- Point pnt(fmod(point[0],size[0]),fmod(point[1],size[1]));
- while(pnt[0]<0)pnt[0]+=abs(size[0]);
- while(pnt[1]<0)pnt[1]+=abs(size[1]);
- pnt-=Vector(size[0]*0.5,size[1]*0.5);
- pnt*=2.0;
- pnt[0]/=size[0];
- pnt[1]/=size[1];
-
- radius1=pnt.mag()/SQRT2;
- radius1*=radius1;
- }
- if(type==TYPE_DARKONLIGHT || type== TYPE_LIGHTONDARK)
- return radius1;
-
- {
- Point pnt(fmod(point[0]+size[0]*0.5,size[0]),fmod(point[1]+size[0]*0.5,size[1]));
- while(pnt[0]<0)pnt[0]+=abs(size[0]);
- while(pnt[1]<0)pnt[1]+=abs(size[1]);
- pnt-=Vector(size[0]*0.5,size[1]*0.5);
- pnt*=2.0;
- pnt[0]/=size[0];
- pnt[1]/=size[1];
-
- radius2=pnt.mag()/SQRT2;
- radius2*=radius2;
- }
-
- if(type==TYPE_DIAMOND)
- {
- //return (radius1+(1.0f-radius2))*0.5;
- float x((radius1+(1.0f-radius2))*0.5);
- //float x(((radius2-radius1)*((radius1+(1.0f-radius2))*0.5)+radius1)*2.0f);
- x-=0.5;
- x*=2.0;
- if(x<0)x=-sqrt(-x);else x=sqrt(x);
- x*=1.01f;
- x/=2.0;
- x+=0.5;
- return x;
- }
-
- if(type==TYPE_SYMMETRIC)
- {
- float x(((radius2-radius1)*((radius1+(1.0f-radius2))*0.5)+radius1)*2.0f);
- x-=0.5;
- x*=2.0;
- if(x<0)x=-sqrt(-x);else x=sqrt(x);
- x*=1.01f;
- x/=2.0;
- x+=0.5;
- return x;
- }
- return 0;
-}