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/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcssrgbavalueprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkstylecontextprivate.h"
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
GdkRGBA rgba;
};
static void
gtk_css_value_rgba_free (GtkCssValue *value)
{
g_slice_free (GtkCssValue, value);
}
static GtkCssValue *
gtk_css_value_rgba_compute (GtkCssValue *value,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
return _gtk_css_value_ref (value);
}
static gboolean
gtk_css_value_rgba_equal (const GtkCssValue *rgba1,
const GtkCssValue *rgba2)
{
return gdk_rgba_equal (&rgba1->rgba, &rgba2->rgba);
}
static GtkCssValue *
gtk_css_value_rgba_transition (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
GdkRGBA transition;
progress = CLAMP (progress, 0, 1);
transition.red = start->rgba.red + (end->rgba.red - start->rgba.red) * progress;
transition.green = start->rgba.green + (end->rgba.green - start->rgba.green) * progress;
transition.blue = start->rgba.blue + (end->rgba.blue - start->rgba.blue) * progress;
transition.alpha = start->rgba.alpha + (end->rgba.alpha - start->rgba.alpha) * progress;
return _gtk_css_rgba_value_new_from_rgba (&transition);
}
static void
gtk_css_value_rgba_print (const GtkCssValue *rgba,
GString *string)
{
char *s = gdk_rgba_to_string (&rgba->rgba);
g_string_append (string, s);
g_free (s);
}
static const GtkCssValueClass GTK_CSS_VALUE_RGBA = {
gtk_css_value_rgba_free,
gtk_css_value_rgba_compute,
gtk_css_value_rgba_equal,
gtk_css_value_rgba_transition,
gtk_css_value_rgba_print
};
GtkCssValue *
_gtk_css_rgba_value_new_from_rgba (const GdkRGBA *rgba)
{
GtkCssValue *value;
g_return_val_if_fail (rgba != NULL, NULL);
value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_RGBA);
value->rgba = *rgba;
return value;
}
const GdkRGBA *
_gtk_css_rgba_value_get_rgba (const GtkCssValue *rgba)
{
g_return_val_if_fail (rgba->class == >K_CSS_VALUE_RGBA, NULL);
return &rgba->rgba;
}
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