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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 "image_luma.h"
#include "kino_plugin_types.h"
#include <kino/image_transitions.h>
#include <gtkmm/adjustment.h>
#include <gtkmm/box.h>
#include <gtkmm/button.h>
#include <gtkmm/checkbutton.h>
#include <gtkmm/entry.h>
#include <gtkmm/fileselection.h>
#include <gtkmm/main.h>
#include <gtkmm/spinbutton.h>
#include <gtkmm/window.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <algorithm>
#include <functional>
#include <iostream>
#include <string>
#include <vector>
namespace
{
class invert_luma
{
public:
void operator()(kino::basic_luma<double>& RHS)
{
RHS.luma = 1.0 - RHS.luma;
}
};
class image_luma :
public GDKImageTransition
{
public:
image_luma() :
m_filepath(std::string(g_get_home_dir()) + "/"),
m_softness(0.2),
m_reverse(false),
m_interlaced(true),
m_even_field_first(true)
{
Gtk::Main main(0, 0);
// Setup our user interface ...
m_path_entry.set_text(m_filepath);
Gtk::Button* const browse_button = new Gtk::Button("Browse ...");
browse_button->signal_clicked().connect(sigc::mem_fun(*this, &image_luma::on_browse));
Gtk::HBox* const file_group = new Gtk::HBox(false, 0);
file_group->pack_start(*manage(new Gtk::Label("Image:")), false, true);
file_group->pack_start(m_path_entry, true, true);
file_group->pack_start(*manage(browse_button), false, true);
m_reverse_button.add(*manage(new Gtk::Label("Reverse")));
m_reverse_button.set_active(m_reverse);
m_interlaced_button.add(*manage(new Gtk::Label("Interlace")));
m_interlaced_button.set_active(m_interlaced);
m_even_field_first_button.add(*manage(new Gtk::Label("Lower Field First")));
m_even_field_first_button.set_active(m_even_field_first);
m_softness_spin_button.set_adjustment(*manage(new Gtk::Adjustment(m_softness, 0.0, 1.0, 0.01, 0.1)));
m_softness_spin_button.set_numeric(true);
m_softness_spin_button.set_digits(2);
m_softness_spin_button.set_wrap(false);
m_softness_spin_button.set_snap_to_ticks(true);
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_softness_spin_button, true, true);
Gtk::VBox* const vbox = new Gtk::VBox(false, 0);
vbox->pack_start(*manage(file_group), false, true);
vbox->pack_start(*manage(options_group), false, true);
vbox->pack_start(m_reverse_button, false, true);
vbox->pack_start(m_interlaced_button, false, true);
vbox->pack_start(m_even_field_first_button, false, true);
vbox->show_all();
m_window.add(*manage(vbox));
}
char *GetDescription( ) const
{
return "Image Luma";
}
void GetFrame( uint8_t *io, uint8_t *mesh, int width, int height, double position, double frame_delta, bool reverse )
{
if ( !m_luma.data() )
{
GError *gerr = NULL;
// Load the luma definition from file
kino::raii<GdkPixbuf> raw_image( gdk_pixbuf_new_from_file( m_filepath.c_str(), &gerr ),
reinterpret_cast< void (*)(GdkPixbuf*) >( g_object_unref ) );
if ( !raw_image.get() )
throw("failed to load luma image from file");
// Scale the luma definition to the frame
kino::raii<GdkPixbuf> scaled_image( gdk_pixbuf_scale_simple( raw_image.get(), width, height, GDK_INTERP_HYPER ),
reinterpret_cast< void (*)(GdkPixbuf*) >( g_object_unref ) );
// Cache the image luma as doubles, normalized in the range [0, 1]
m_luma.reset( width, height );
std::copy( reinterpret_cast< kino::basic_rgb<uint8_t>* >( gdk_pixbuf_get_pixels( scaled_image.get() ) ),
reinterpret_cast< kino::basic_rgb<uint8_t>* >( gdk_pixbuf_get_pixels( scaled_image.get() ) +
height * gdk_pixbuf_get_rowstride( scaled_image.get() ) ),
m_luma.begin() );
if ( m_reverse )
std::for_each( m_luma.begin(), m_luma.end(), invert_luma() );
}
const kino::basic_rgb<uint8_t>* a = reinterpret_cast<kino::basic_rgb<uint8_t>*>(io);
const kino::basic_rgb<uint8_t>* b = reinterpret_cast<kino::basic_rgb<uint8_t>*>(mesh);
kino::basic_rgb<uint8_t>* output = reinterpret_cast<kino::basic_rgb<uint8_t>*>(io);
for( int field = 0; field < (m_interlaced ? 2 : 1); ++field )
{
// Offset the position based on which field we're looking at ...
const double field_position = position + ((m_even_field_first ? 1 - field : field) * frame_delta * 0.5);
// Scale the position so that the entire wipe will be complete (including the "soft" edge) by the time we finish ...
const double adjusted_position = kino::lerp(0.0, 1.0 + m_softness, field_position);
// For each row ...
for( int row = field; row < height; row += (m_interlaced ? 2 : 1) )
{
const kino::basic_rgb<uint8_t>* pixel_a = &a[row * width];
const kino::basic_rgb<uint8_t>* pixel_b = &b[row * width];
const kino::basic_luma<double>* pixel_luma = &m_luma.data()[row * width];
kino::basic_rgb<uint8_t>* pixel_output = &output[row * width];
for( int column = 0; column < width; ++column )
{
const double mix = kino::smoothstep(pixel_luma->luma, pixel_luma->luma + m_softness, adjusted_position);
pixel_output->red = kino::lerp(pixel_a->red, pixel_b->red, mix);
pixel_output->green = kino::lerp(pixel_a->green, pixel_b->green, mix);
pixel_output->blue = kino::lerp(pixel_a->blue, pixel_b->blue, mix);
++pixel_a;
++pixel_b;
++pixel_luma;
++pixel_output;
}
}
}
}
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_filepath = m_path_entry.get_chars(0, -1);
m_softness = m_softness_spin_button.get_value();
m_reverse = m_reverse_button.get_active();
m_interlaced = m_interlaced_button.get_active();
m_even_field_first = m_even_field_first_button.get_active();
m_luma.clear();
}
private:
void on_browse()
{
m_file_selection_dialog.set_filename(m_path_entry.get_chars(0, -1));
m_file_selection_dialog.show();
m_file_selection_dialog.run();
m_path_entry.set_text(m_file_selection_dialog.get_filename());
m_file_selection_dialog.hide();
}
std::string m_filepath;
kino::basic_bitmap<kino::basic_luma<double> > m_luma;
double m_softness;
bool m_reverse;
bool m_interlaced;
bool m_even_field_first;
Gtk::Window m_window;
Gtk::Entry m_path_entry;
Gtk::FileSelection m_file_selection_dialog;
Gtk::SpinButton m_softness_spin_button;
Gtk::CheckButton m_reverse_button;
Gtk::CheckButton m_interlaced_button;
Gtk::CheckButton m_even_field_first_button;
};
} // namespace
GDKImageTransition* image_luma_factory()
{
return new image_luma();
}
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