/usr/include/synfig-1.0/synfig/blur.h is in libsynfig-dev 1.2.1-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*! \file synfig/blur.h
** \brief Blur Helper Header file
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2012-2013 Carlos López
**
** 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
*/
/* ========================================================================= */
/* === S T A R T =========================================================== */
#ifndef __SYNFIG_BLUR_HELPER_H
#define __SYNFIG_BLUR_HELPER_H
/* === H E A D E R S ======================================================= */
#include "vector.h"
#include "surface.h"
#include "progresscallback.h"
/* === M A C R O S ========================================================= */
/* === T Y P E D E F S ===================================================== */
/* === C L A S S E S & S T R U C T S ======================================= */
class Blur
{
public:
enum Type
{
BOX =0,
FASTGAUSSIAN =1,
CROSS =2,
GAUSSIAN =3,
DISC =4,
FORCE_DWORD = 0x8fffffff
};
private:
synfig::Point size;
int type;
synfig::ProgressCallback *cb;
public:
static synfig::Real get_size_amplifier(int type);
void set_size(const synfig::Point &x) { size = x; }
const synfig::Point& get_size() const { return size; }
void set_type(int x) { type = x; }
int get_type() const { return type; }
static synfig::Real get_surface_extra_size_amplifier(int type) {
static const synfig::Real gauss_max_deviation = 1.0 / 512.0;
static const synfig::Real gauss_size_amplifier = 0.5*sqrt(-2.0*log(gauss_max_deviation));
switch(type)
{
case Blur::DISC:
case Blur::BOX:
case Blur::CROSS:
return 0.5;
case Blur::FASTGAUSSIAN:
return 1.0;
case Blur::GAUSSIAN:
return gauss_size_amplifier;
default:
break;
}
return 0.0;
}
synfig::Real get_surface_extra_size_amplifier() const
{ return get_surface_extra_size_amplifier(get_type()); }
synfig::Point get_surface_extra_size() const
{ return get_size() * get_surface_extra_size_amplifier(); }
void get_surface_extra_size(synfig::Real pixels_per_width_unit, synfig::Real pixels_per_height_unit, int &out_dx, int &out_dy) const {
synfig::Point es = get_surface_extra_size();
out_dx = (int)ceil(fabs(es[0]*pixels_per_width_unit));
out_dy = (int)ceil(fabs(es[1]*pixels_per_height_unit));
}
void get_surface_expanded_size(synfig::Real pixels_per_width_unit, synfig::Real pixels_per_height_unit, int &width, int &height) const {
int dw, dh;
get_surface_extra_size(pixels_per_width_unit, pixels_per_height_unit, dw, dh);
width = width > 0 ? width + 2*dw : 2*dw;
height = height > 0 ? height + 2*dh : 2*dh;
}
Blur(): type(), cb() {}
Blur(const synfig::Point &s, int t, synfig::ProgressCallback *callb=0):size(s), type(t), cb(callb) {}
Blur(synfig::Real sx, synfig::Real sy, int t, synfig::ProgressCallback *callb = 0): size(sx,sy), type(t), cb(callb) {}
//Parametric Blur
synfig::Point operator()(const synfig::Point &p) const;
synfig::Point operator()(synfig::Real x, synfig::Real y) const;
//Surface based blur
// input surface can be the same as output surface,
// though both have to be the same size
bool operator()(const synfig::Surface &surface, const synfig::Vector &resolution, synfig::Surface &out) const;
bool operator()(cairo_surface_t *surface, const synfig::Vector &resolution, cairo_surface_t *out) const;
bool operator()(const etl::surface<float> &surface, const synfig::Vector &resolution, etl::surface<float> &out) const;
//bool operator()(const etl::surface<unsigned char> &surface, const Vector &resolution, etl::surface<unsigned char> &out) const;
};
/* === E N D =============================================================== */
#endif
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