mirror of
https://github.com/brl/mutter.git
synced 2024-11-23 08:30:42 -05:00
105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
|
#include "cb-background-effect.h"
|
||
|
|
|
||
|
|
G_DEFINE_TYPE (CbBackgroundEffect, cb_background_effect, CLUTTER_TYPE_EFFECT);
|
||
|
|
|
||
|
|
#define CB_BACKGROUND_EFFECT_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
|
||
|
|
CB_TYPE_BACKGROUND_EFFECT, \
|
||
|
|
CbBackgroundEffectPrivate))
|
||
|
|
|
||
|
|
struct _CbBackgroundEffectPrivate
|
||
|
|
{
|
||
|
|
CoglMaterial *background;
|
||
|
|
CoglColor *color;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* ClutterEffect implementation */
|
||
|
|
|
||
|
|
/* note that if pre_paint() returns FALSE
|
||
|
|
* any post_paint() defined for the effect will not be called
|
||
|
|
*/
|
||
|
|
static gboolean
|
||
|
|
cb_background_effect_pre_paint (ClutterEffect *self)
|
||
|
|
{
|
||
|
|
ClutterActor *actor;
|
||
|
|
gfloat width;
|
||
|
|
gfloat height;
|
||
|
|
CbBackgroundEffectPrivate *priv;
|
||
|
|
|
||
|
|
priv = CB_BACKGROUND_EFFECT (self)->priv;
|
||
|
|
|
||
|
|
/* get the associated actor's dimensions */
|
||
|
|
actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (self));
|
||
|
|
clutter_actor_get_size (actor, &width, &height);
|
||
|
|
|
||
|
|
/* draw a grey Cogl rectangle in the background */
|
||
|
|
cogl_set_source (priv->background);
|
||
|
|
|
||
|
|
cogl_rectangle (0, 0, width, height);
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* GObject implementation */
|
||
|
|
static void
|
||
|
|
cb_background_effect_dispose (GObject *gobject)
|
||
|
|
{
|
||
|
|
CbBackgroundEffectPrivate *priv = CB_BACKGROUND_EFFECT (gobject)->priv;
|
||
|
|
|
||
|
|
if (priv->background != COGL_INVALID_HANDLE)
|
||
|
|
{
|
||
|
|
cogl_handle_unref (priv->background);
|
||
|
|
priv->background = COGL_INVALID_HANDLE;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (priv->color != NULL)
|
||
|
|
{
|
||
|
|
cogl_color_free (priv->color);
|
||
|
|
priv->color = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
G_OBJECT_CLASS (cb_background_effect_parent_class)->dispose (gobject);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
cb_background_effect_class_init (CbBackgroundEffectClass *klass)
|
||
|
|
{
|
||
|
|
ClutterEffectClass *effect_class = CLUTTER_EFFECT_CLASS (klass);
|
||
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
||
|
|
|
||
|
|
effect_class->pre_paint = cb_background_effect_pre_paint;
|
||
|
|
gobject_class->dispose = cb_background_effect_dispose;
|
||
|
|
|
||
|
|
g_type_class_add_private (klass, sizeof (CbBackgroundEffectPrivate));
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
cb_background_effect_init (CbBackgroundEffect *self)
|
||
|
|
{
|
||
|
|
CbBackgroundEffectPrivate *priv;
|
||
|
|
|
||
|
|
priv = self->priv = CB_BACKGROUND_EFFECT_GET_PRIVATE (self);
|
||
|
|
|
||
|
|
priv->background = cogl_material_new ();
|
||
|
|
|
||
|
|
/* grey color for filling the background material */
|
||
|
|
priv->color = cogl_color_new ();
|
||
|
|
cogl_color_init_from_4ub (priv->color, 122, 122, 122, 255);
|
||
|
|
|
||
|
|
cogl_material_set_color (priv->background, priv->color);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* public API */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cb_background_effect_new:
|
||
|
|
*
|
||
|
|
* Creates a new #ClutterEffect which adds a grey background
|
||
|
|
* when applied to a rectangular actor.
|
||
|
|
*/
|
||
|
|
ClutterEffect *
|
||
|
|
cb_background_effect_new ()
|
||
|
|
{
|
||
|
|
return g_object_new (CB_TYPE_BACKGROUND_EFFECT,
|
||
|
|
NULL);
|
||
|
|
}
|