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// timfx
// Copyright 2002, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// This program 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 program 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.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include "soft_focus.h"
#include "kino_plugin_types.h"
#include <kino/image_filters.h>
#include <gtkmm/adjustment.h>
#include <gtkmm/box.h>
#include <gtkmm/checkbutton.h>
#include <gtkmm/label.h>
#include <gtkmm/main.h>
#include <gtkmm/spinbutton.h>
#include <gtkmm/window.h>
#include <deque>
#include <numeric>
#include <vector>
namespace
{
class soft_focus :
public GDKImageFilter
{
public:
soft_focus() :
m_radius(15),
m_mix(0.5)
{
Gtk::Main main(0, 0);
m_radius_spin_button.set_adjustment(*manage(new Gtk::Adjustment(m_radius, 1, 1000, 1, 10)));
m_radius_spin_button.set_numeric(true);
m_radius_spin_button.set_digits(0);
m_radius_spin_button.set_wrap(false);
m_radius_spin_button.set_snap_to_ticks(false);
m_radius_spin_button.set_value(m_radius);
m_mix_spin_button.set_adjustment(*manage(new Gtk::Adjustment(m_mix, 0.0, 1.0, 0.01, 0.1)));
m_mix_spin_button.set_numeric(true);
m_mix_spin_button.set_digits(2);
m_mix_spin_button.set_wrap(false);
m_mix_spin_button.set_snap_to_ticks(false);
Gtk::HBox* const options_group = new Gtk::HBox(false, 0);
options_group->pack_start(*manage(new Gtk::Label("Softness:")), false, true);
options_group->pack_start(m_radius_spin_button, true, true);
Gtk::HBox* const options_group2 = new Gtk::HBox(false, 0);
options_group2->pack_start(*manage(new Gtk::Label("Amount:")), false, true);
options_group2->pack_start(m_mix_spin_button, true, true);
Gtk::VBox* const vbox = new Gtk::VBox(false, 0);
vbox->pack_start(*manage(options_group), false, true);
vbox->pack_start(*manage(options_group2), false, true);
vbox->show_all();
m_window.add(*manage(vbox));
}
char *GetDescription( ) const
{
return "Soft Focus";
}
void FilterFrame(uint8_t* pixels, int width, int height, double position, double frame_delta)
{
// Create a copy of the source image for later mixing with the blurred version ...
kino::basic_bitmap<kino::basic_rgb<uint8_t> > blurred_image(pixels, width, height);
// Create an N-pixel filter kernel
kino::convolve_filter<kino::basic_rgb<double> > filter;
unsigned int n = m_radius * 2;
/* Gaussian distribution
for(unsigned int i = 0; i <= n; ++i)
filter.push_weight(factorial(n) / (factorial(i) * factorial(n - i)));
*/
/* Box distribution
for(unsigned int i = 0; i <= n; ++i)
filter.push_weight(1);
*/
/* Triangle distribution */
for(int i = 0; i <= n; ++i)
filter.push_weight((n * 0.5) - fabs(i - (n * 0.5)));
// Filter horizontally ...
for(int row = 0; row < height; ++row)
{
kino::basic_rgb<uint8_t>* const a = blurred_image.begin() + (row * width);
kino::basic_rgb<uint8_t>* const b = a + filter.neighbors();
kino::basic_rgb<uint8_t>* const c = a + width - filter.neighbors();
kino::basic_rgb<uint8_t>* const d = a + width;
// Initialize the kernel ...
for(const kino::basic_rgb<uint8_t>* neighbor = a; neighbor != b; ++neighbor)
filter.push_value(*neighbor);
// First border zone ...
unsigned int start = filter.middle();
for(kino::basic_rgb<uint8_t>* current = a; current != b; ++current, --start)
{
filter.push_value(*(current + filter.neighbors()));
*current = filter.get_value(start, filter.width());
}
// Image body ...
for(kino::basic_rgb<uint8_t>* current = b; current != c; ++current)
{
filter.push_value(*(current + filter.neighbors()));
*current = filter.get_value();
}
// Second border zone ...
unsigned int remaining_width = filter.width()-1;
for(kino::basic_rgb<uint8_t>* current = c; current != d; ++current, --remaining_width)
{
filter.push_value(kino::basic_rgb<uint8_t>());
*current = filter.get_value(0, remaining_width);
}
}
// Filter vertically ...
for(int column = 0; column < width; ++column)
{
kino::basic_rgb<uint8_t>* const a = blurred_image.begin() + column;
kino::basic_rgb<uint8_t>* const b = a + filter.neighbors() * width;
kino::basic_rgb<uint8_t>* const c = a + (height - filter.neighbors()) * width;
kino::basic_rgb<uint8_t>* const d = a + height * width;
// Initialize the kernel ...
for(const kino::basic_rgb<uint8_t>* neighbor = a; neighbor != b; neighbor += width)
filter.push_value(*neighbor);
// First border zone ...
unsigned int start = filter.middle();
for(kino::basic_rgb<uint8_t>* current = a; current != b; current += width, --start)
{
filter.push_value(*(current + filter.neighbors() * width));
*current = filter.get_value(start, filter.width());
}
// Image body ...
for(kino::basic_rgb<uint8_t>* current = b; current != c; current += width)
{
filter.push_value(*(current + filter.neighbors() * width));
*current = filter.get_value();
}
// Second border zone ...
unsigned int remaining_width = filter.width() - 1;
for(kino::basic_rgb<uint8_t>* current = c; current != d; current += width, --remaining_width)
{
filter.push_value(kino::basic_rgb<uint8_t>());
*current = filter.get_value(0, remaining_width);
}
}
// Mix the blurred image with the original ...
kino::basic_rgb<uint8_t>* original_pixel = reinterpret_cast<kino::basic_rgb<uint8_t>*>(pixels);
for(kino::basic_bitmap<kino::basic_rgb<uint8_t> >::const_iterator blurred_pixel = blurred_image.begin(); blurred_pixel != blurred_image.end(); ++blurred_pixel, ++original_pixel)
{
original_pixel->red = kino::lerp(original_pixel->red, blurred_pixel->red, m_mix);
original_pixel->green = kino::lerp(original_pixel->green, blurred_pixel->green, m_mix);
original_pixel->blue = kino::lerp(original_pixel->blue, blurred_pixel->blue, m_mix);
}
}
void AttachWidgets(GtkBin* bin)
{
gtk_widget_reparent( ( GTK_BIN( m_window.gobj() ) )->child, GTK_WIDGET( bin ) );
}
void DetachWidgets(GtkBin* bin)
{
gtk_widget_reparent( ( GTK_BIN( bin ) )->child, GTK_WIDGET( m_window.gobj() ) );
}
void InterpretWidgets( GtkBin *bin )
{
m_radius = m_radius_spin_button.get_value_as_int();
m_mix = m_mix_spin_button.get_value();
}
private:
Gtk::SpinButton m_radius_spin_button;
Gtk::SpinButton m_mix_spin_button;
Gtk::Window m_window;
unsigned int m_radius;
double m_mix;
};
} // namespace
GDKImageFilter* soft_focus_factory()
{
return new soft_focus();
}
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