f83ffa3520
* clutter/clutter-private.h: Add our own READABLE, WRITABLE and READWRITE paramspec flags, declaring the string components of the properties GParamSpec as static; this should shave off some bytes in the memory footprint and avoid relocations. * clutter/clutter-actor.c: * clutter/clutter-behaviour.c: * clutter/clutter-behaviour-opacity.c: * clutter/clutter-behaviour-path.c: * clutter/clutter-behavuour-scale.c: * clutter/clutter-clone-texture.c: * clutter/clutter-label.c: * clutter/clutter-rectangle.c: * clutter/clutter-stage.c: * clutter/clutter-texture.c: * clutter/clutter-timeline.c: Use the CLUTTER_PARAM_* macros we just added. * clutter/clutter-behaviour-scale.c: Add properties for the scale begin, scale end and gravity parameters. * clutter/clutter-behaviour-path.h: Mark the ClutterKnot memory management functions as public (for the bindings), since we use the slice allocator for copying knots around; add a clutter_knot_equal() function. * clutter/clutter-behaviour-path.c: (node_distance): Use clutter_knot_equal() as a fast path to avoid the sqrt() in case the nodes we are using are at the same position. (path_total_length): Additional check on the existence of the next node. * examples/behave.c: Do not leak the ClutterBehaviour objects around.
237 lines
7.2 KiB
C
237 lines
7.2 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2006 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:clutter-behaviour-opacity
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* @short_description: A behaviour class interpolating actors opacity between
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* two values.
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*
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* #ClutterBehaviourPath interpolates actors opacity between two values.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "clutter-actor.h"
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#include "clutter-behaviour.h"
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#include "clutter-behaviour-opacity.h"
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#include "clutter-enum-types.h"
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#include "clutter-main.h"
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#include "clutter-private.h"
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#include "clutter-debug.h"
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#include <math.h>
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/**
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* SECTION:clutter-behaviour-opacity
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* @short_description: Behaviour controlling the opacity
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*
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* #ClutterBehaviourOpacity controls the opacity of a set of actors.
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*
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* Since: 0.2
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*/
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G_DEFINE_TYPE (ClutterBehaviourOpacity,
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clutter_behaviour_opacity,
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CLUTTER_TYPE_BEHAVIOUR);
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struct _ClutterBehaviourOpacityPrivate
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{
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guint8 opacity_start;
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guint8 opacity_end;
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};
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#define CLUTTER_BEHAVIOUR_OPACITY_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
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CLUTTER_TYPE_BEHAVIOUR_OPACITY, \
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ClutterBehaviourOpacityPrivate))
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enum
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{
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PROP_0,
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PROP_OPACITY_START,
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PROP_OPACITY_END
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};
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static void
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opacity_frame_foreach (ClutterActor *actor,
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ClutterBehaviourOpacity *behave)
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{
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guint32 alpha;
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guint8 opacity;
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ClutterBehaviourOpacityPrivate *priv;
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ClutterBehaviour *_behave;
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priv = CLUTTER_BEHAVIOUR_OPACITY_GET_PRIVATE (behave);
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_behave = CLUTTER_BEHAVIOUR (behave);
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alpha = clutter_alpha_get_alpha (clutter_behaviour_get_alpha (_behave));
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opacity = (alpha * (priv->opacity_end - priv->opacity_start))
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/ CLUTTER_ALPHA_MAX_ALPHA;
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opacity += priv->opacity_start;
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CLUTTER_NOTE (BEHAVIOUR, "alpha %i opacity %i\n", alpha, opacity);
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clutter_actor_set_opacity (actor, opacity);
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}
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static void
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clutter_behaviour_alpha_notify (ClutterBehaviour *behave,
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guint32 alpha_value)
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{
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clutter_behaviour_actors_foreach (behave,
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(GFunc) opacity_frame_foreach,
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CLUTTER_BEHAVIOUR_OPACITY (behave));
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}
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static void
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clutter_behaviour_opacity_set_property (GObject *gobject,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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ClutterBehaviourOpacity *opacityb = CLUTTER_BEHAVIOUR_OPACITY (gobject);
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switch (prop_id)
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{
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case PROP_OPACITY_START:
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opacityb->priv->opacity_start = g_value_get_uint (value);
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break;
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case PROP_OPACITY_END:
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opacityb->priv->opacity_end = g_value_get_uint (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_behaviour_opacity_get_property (GObject *gobject,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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ClutterBehaviourOpacity *opacityb = CLUTTER_BEHAVIOUR_OPACITY (gobject);
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switch (prop_id)
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{
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case PROP_OPACITY_START:
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g_value_set_uint (value, opacityb->priv->opacity_start);
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break;
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case PROP_OPACITY_END:
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g_value_set_uint (value, opacityb->priv->opacity_end);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_behaviour_opacity_class_init (ClutterBehaviourOpacityClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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ClutterBehaviourClass *behave_class = CLUTTER_BEHAVIOUR_CLASS (klass);
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gobject_class->set_property = clutter_behaviour_opacity_set_property;
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gobject_class->get_property = clutter_behaviour_opacity_get_property;
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/**
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* ClutterBehaviourOpacity:opacity-start:
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*
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* Initial opacity level of the behaviour.
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*
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* Since: 0.2
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*/
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g_object_class_install_property (gobject_class,
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PROP_OPACITY_START,
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g_param_spec_uint ("opacity-start",
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"Opacity Start",
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"Initial opacity level",
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0, 255,
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0,
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CLUTTER_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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/**
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* ClutterBehaviourOpacity:opacity-end:
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*
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* Final opacity level of the behaviour.
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*
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* Since: 0.2
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*/
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g_object_class_install_property (gobject_class,
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PROP_OPACITY_END,
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g_param_spec_uint ("opacity-end",
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"Opacity End",
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"Final opacity level",
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0, 255,
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0,
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CLUTTER_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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behave_class->alpha_notify = clutter_behaviour_alpha_notify;
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g_type_class_add_private (klass, sizeof (ClutterBehaviourOpacityPrivate));
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}
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static void
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clutter_behaviour_opacity_init (ClutterBehaviourOpacity *self)
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{
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self->priv = CLUTTER_BEHAVIOUR_OPACITY_GET_PRIVATE (self);
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}
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/**
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* clutter_behaviour_opacity_new:
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* @alpha: a #ClutterAlpha instance, or %NULL
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* @opacity_start: minimum level of opacity
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* @opacity_end: maximum level of opacity
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*
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* Creates a new #ClutterBehaviourOpacity object, driven by @alpha
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* which controls the opacity property of every actor, making it
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* change in the interval between @opacity_start and @opacity_end.
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*
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* Return value: the newly created #ClutterBehaviourOpacity
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*
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* Since: 0.2
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*/
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ClutterBehaviour *
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clutter_behaviour_opacity_new (ClutterAlpha *alpha,
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guint8 opacity_start,
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guint8 opacity_end)
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{
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return g_object_new (CLUTTER_TYPE_BEHAVIOUR_OPACITY,
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"alpha", alpha,
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"opacity-start", opacity_start,
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"opacity-end", opacity_end,
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NULL);
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}
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