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/*
* Copyright (C) 2001 Havoc Pennington
* Copyright (C) 2016 Alberts Muktupāvels
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "meta-hsla-private.h"
#include "meta-color-private.h"
#include "meta-color.h"
#define LIGHTNESS_MULT 1.3
#define DARKNESS_MULT 0.7
/**
* meta_color_shade:
* @source: #GdkRGBA color
* @factor: amount to scale saturation and lightness
* @destination: (out): location to store #GdkRGBA color
*
* Takes a @source color, scales saturation and lightness by @factor and
* sets @destionation to the resulting color.
*/
void
meta_color_shade (const GdkRGBA *source,
const gdouble factor,
GdkRGBA *destination)
{
MetaHSLA hsla;
meta_hsla_from_rgba (&hsla, source);
meta_hsla_shade (&hsla, factor, &hsla);
meta_hsla_to_rgba (&hsla, destination);
}
/**
* meta_color_get_background_color:
* @context: a #GtkStyleContext
* @state: state to retrieve the color for
* @color: (out): location to store the background color
*
* Gets the background color for a given state.
*/
void
meta_color_get_background_color (GtkStyleContext *context,
GtkStateFlags state,
GdkRGBA *color)
{
GdkRGBA *tmp;
g_return_if_fail (color != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_get (context, state, "background-color", &tmp, NULL);
*color = *tmp;
gdk_rgba_free (tmp);
}
/**
* meta_color_get_light_color:
* @context: a #GtkStyleContext
* @state: state to retrieve the color for
* @color: (out): location to store the light color
*
* Gets the light color of background color for a given state.
*/
void
meta_color_get_light_color (GtkStyleContext *context,
GtkStateFlags state,
GdkRGBA *color)
{
meta_color_get_background_color (context, state, color);
meta_color_shade (color, LIGHTNESS_MULT, color);
}
/**
* meta_color_get_dark_color:
* @context: a #GtkStyleContext
* @state: state to retrieve the color for
* @color: (out): location to store the dark color
*
* Gets the dark color of background color for a given state.
*/
void
meta_color_get_dark_color (GtkStyleContext *context,
GtkStateFlags state,
GdkRGBA *color)
{
meta_color_get_background_color (context, state, color);
meta_color_shade (color, DARKNESS_MULT, color);
}
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