forked from AuroraMiddleware/gtk
107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/* 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;
|
|
}
|