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/*
* Copyright (C) 2011-2012 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* Authored by: Gordon Allott <gord.alott@canonical.com>
*/
#include "BGHash.h"
#include <gdk/gdkx.h>
#include <NuxCore/Logger.h>
#include "unity-shared/UBusMessages.h"
namespace
{
nux::logging::Logger logger("unity.BGHash");
}
namespace unity
{
BGHash::BGHash()
: current_color_(unity::colors::Aubergine)
{
transition_animator_.SetDuration(500);
override_color_.alpha = 0.0f;
transition_animator_.updated.connect(sigc::mem_fun(this, &BGHash::OnTransitionUpdated));
ubus_manager_.RegisterInterest(UBUS_BACKGROUND_REQUEST_COLOUR_EMIT, [&](GVariant *) { DoUbusColorEmit(); } );
RefreshColor();
}
void BGHash::OverrideColor(nux::Color const& color)
{
override_color_ = color;
RefreshColor();
}
void BGHash::RefreshColor()
{
if (override_color_.alpha > 0.0f)
{
TransitionToNewColor(override_color_);
return;
}
Atom real_type;
gint result;
gint real_format;
gulong items_read;
gulong items_left;
gchar* colors;
Atom representative_colors_atom;
Display* display;
GdkRGBA color_gdk;
representative_colors_atom = gdk_x11_get_xatom_by_name("_GNOME_BACKGROUND_REPRESENTATIVE_COLORS");
display = gdk_x11_display_get_xdisplay(gdk_display_get_default ());
gdk_error_trap_push();
result = XGetWindowProperty (display,
GDK_ROOT_WINDOW(),
representative_colors_atom,
0L,
G_MAXLONG,
False,
XA_STRING,
&real_type,
&real_format,
&items_read,
&items_left,
(guchar **) &colors);
gdk_flush ();
gdk_error_trap_pop_ignored ();
if (result == Success && items_read)
{
gdk_rgba_parse(&color_gdk, colors);
nux::Color new_color(color_gdk.red,
color_gdk.green,
color_gdk.blue,
1.0f);
TransitionToNewColor(MatchColor(new_color));
XFree (colors);
}
}
void BGHash::TransitionToNewColor(nux::color::Color const& new_color)
{
if (new_color == current_color_)
return;
LOG_DEBUG(logger) << "transitioning from: " << current_color_.red << " to " << new_color.red;
transition_animator_.SetStartValue(current_color_);
transition_animator_.SetFinishValue(new_color);
transition_animator_.Stop();
transition_animator_.Start();
}
void BGHash::OnTransitionUpdated(nux::Color const& new_color)
{
current_color_ = new_color;
DoUbusColorEmit();
}
void BGHash::DoUbusColorEmit()
{
ubus_manager_.SendMessage(UBUS_BACKGROUND_COLOR_CHANGED,
g_variant_new ("(dddd)",
current_color_.red,
current_color_.green,
current_color_.blue,
current_color_.alpha));
}
nux::Color BGHash::MatchColor(nux::Color const& base_color) const
{
nux::Color colors[12];
colors[ 0] = nux::Color (0x540e44);
colors[ 1] = nux::Color (0x6e0b2a);
colors[ 2] = nux::Color (0x841617);
colors[ 3] = nux::Color (0x84371b);
colors[ 4] = nux::Color (0x864d20);
colors[ 5] = nux::Color (0x857f31);
colors[ 6] = nux::Color (0x1d6331);
colors[ 7] = nux::Color (0x11582e);
colors[ 8] = nux::Color (0x0e5955);
colors[ 9] = nux::Color (0x192b59);
colors[10] = nux::Color (0x1b134c);
colors[11] = nux::Color (0x2c0d46);
nux::Color chosen_color;
nux::color::HueSaturationValue base_hsv (base_color);
if (base_hsv.saturation < 0.08)
{
// grayscale image
LOG_DEBUG (logger) << "got a grayscale image";
chosen_color = nux::Color (46 , 52 , 54 );
chosen_color.alpha = 0.72f;
}
else
{
float closest_diff = 200.0f;
LOG_DEBUG (logger) << "got a colour image";
// full colour image
for (int i = 0; i < 11; i++)
{
nux::color::HueSaturationValue comparison_hsv (colors[i]);
float color_diff = fabs(base_hsv.hue - comparison_hsv.hue);
if (color_diff < closest_diff)
{
chosen_color = colors[i];
closest_diff = color_diff;
}
}
nux::color::HueSaturationValue hsv_color (chosen_color);
hsv_color.saturation = std::min(base_hsv.saturation, hsv_color.saturation);
hsv_color.saturation *= (2.0f - hsv_color.saturation);
hsv_color.value = std::min(std::min(base_hsv.value, hsv_color.value), 0.26f);
chosen_color = nux::Color (nux::color::RedGreenBlue(hsv_color));
chosen_color.alpha = 0.72f;
}
LOG_DEBUG(logger) << "eventually chose "
<< chosen_color.red << ", "
<< chosen_color.green << ", "
<< chosen_color.blue;
return chosen_color;
}
nux::Color const& BGHash::CurrentColor() const
{
return current_color_;
}
}
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