[clutter/wip/transitions: 6/9] Add ClutterKeyframeTransition
- From: Emmanuele Bassi <ebassi src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [clutter/wip/transitions: 6/9] Add ClutterKeyframeTransition
- Date: Wed, 11 Apr 2012 16:50:14 +0000 (UTC)
commit e6abad80b92a428ddaf7696bb4b3dceb91f12ce5
Author: Emmanuele Bassi <ebassi linux intel com>
Date: Wed Apr 11 15:53:52 2012 +0100
Add ClutterKeyframeTransition
A simple transition class that interpolates a property between key
frames.
clutter/Makefile.am | 2 +
clutter/clutter-keyframe-transition.c | 628 ++++++++++++++++++++++++++
clutter/clutter-keyframe-transition.h | 105 +++++
clutter/clutter-types.h | 1 +
clutter/clutter.h | 1 +
clutter/clutter.symbols | 11 +
doc/reference/clutter/clutter-docs.xml.in | 5 +-
doc/reference/clutter/clutter-sections.txt | 22 +
doc/reference/clutter/clutter.types | 1 +
tests/interactive/Makefile.am | 3 +-
tests/interactive/test-keyframe-transition.c | 77 ++++
11 files changed, 853 insertions(+), 3 deletions(-)
---
diff --git a/clutter/Makefile.am b/clutter/Makefile.am
index e2c59f1..80819ee 100644
--- a/clutter/Makefile.am
+++ b/clutter/Makefile.am
@@ -93,6 +93,7 @@ source_h = \
$(srcdir)/clutter-image.h \
$(srcdir)/clutter-input-device.h \
$(srcdir)/clutter-interval.h \
+ $(srcdir)/clutter-keyframe-transition.h \
$(srcdir)/clutter-keysyms.h \
$(srcdir)/clutter-layout-manager.h \
$(srcdir)/clutter-layout-meta.h \
@@ -171,6 +172,7 @@ source_c = \
$(srcdir)/clutter-image.c \
$(srcdir)/clutter-input-device.c \
$(srcdir)/clutter-interval.c \
+ $(srcdir)/clutter-keyframe-transition.c \
$(srcdir)/clutter-keysyms-table.c \
$(srcdir)/clutter-layout-manager.c \
$(srcdir)/clutter-layout-meta.c \
diff --git a/clutter/clutter-keyframe-transition.c b/clutter/clutter-keyframe-transition.c
new file mode 100644
index 0000000..0703d7e
--- /dev/null
+++ b/clutter/clutter-keyframe-transition.c
@@ -0,0 +1,628 @@
+/*
+ * Clutter.
+ *
+ * An OpenGL based 'interactive canvas' library.
+ *
+ * Copyright (C) 2012 Intel Corporation
+ *
+ * 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/>.
+ *
+ * Author: Emmanuele Bassi <ebassi linux intel com>
+ */
+
+/**
+ * SECTION:clutter-keyframe-transition
+ * @Title: ClutterKeyframeTransition
+ * @Short_Description: Keyframe property transition
+ *
+ * #ClutterKeyframeTransition allows animating a property by defining
+ * "key frames": values at a normalized position on the transition
+ * duration.
+ *
+ * The #ClutterKeyframeTransition interpolates the value of the property
+ * to which it's bound across these key values.
+ *
+ * Setting up a #ClutterKeyframeTransition means providing the times,
+ * values, and easing modes between these key frames, for instance:
+ *
+ * |[
+ * ClutterTransition *keyframe;
+ *
+ * keyframe = clutter_keyframe_transition_new ("opacity");
+ * clutter_transition_set_from (keyframe, G_TYPE_UINT, 255);
+ * clutter_transition_set_to (keyframe, G_TYPE_UINT, 0);
+ * clutter_keyframe_transition_set_keys (CLUTTER_KEYFRAME_TRANSITION (keyframe),
+ * G_TYPE_UINT,
+ * 1, /* number of key frames */
+ * 0.5, 128, CLUTTER_EASE_IN_OUT_CUBIC);
+ * ]|
+ *
+ * The example above sets up a keyframe transition for the #ClutterActor:opacity
+ * property of a #ClutterActor; the transition starts and sets the value of the
+ * property to fully transparent; between the start of the transition and its mid
+ * point, it will animate the property to half opacity, using an easy in/easy out
+ * progress. Once the transition reaches the mid point, it will linearly fade the
+ * actor out until it reaches the end of the transition.
+ *
+ * The #ClutterKeyframeTransition will add an implicit key frame between the last
+ * and the 1.0 value, to interpolate to the final value of the transition's
+ * interval.
+ *
+ * #ClutterKeyframeTransition is available since Clutter 1.12.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "clutter-keyframe-transition.h"
+
+#include "clutter-debug.h"
+#include "clutter-easing.h"
+#include "clutter-interval.h"
+#include "clutter-private.h"
+#include "clutter-timeline.h"
+
+#include <math.h>
+#include <gobject/gvaluecollector.h>
+
+typedef struct _KeyFrame
+{
+ double key;
+
+ double start;
+ double end;
+
+ ClutterAnimationMode mode;
+
+ ClutterInterval *interval;
+} KeyFrame;
+
+struct _ClutterKeyframeTransitionPrivate
+{
+ GArray *frames;
+
+ gint current_frame;
+};
+
+G_DEFINE_TYPE (ClutterKeyframeTransition,
+ clutter_keyframe_transition,
+ CLUTTER_TYPE_PROPERTY_TRANSITION)
+
+static void
+key_frame_free (gpointer data)
+{
+ if (data != NULL)
+ {
+ KeyFrame *key = data;
+
+ g_object_unref (key->interval);
+ }
+}
+
+static int
+sort_by_key (gconstpointer a,
+ gconstpointer b)
+{
+ const KeyFrame *k_a = a;
+ const KeyFrame *k_b = b;
+
+ if (fabs (k_a->key - k_b->key) < 0.0001)
+ return 0;
+
+ if (k_a->key > k_a->key)
+ return 1;
+
+ return -1;
+}
+
+static inline void
+clutter_keyframe_transition_sort_frames (ClutterKeyframeTransition *transition)
+{
+ if (transition->priv->frames != NULL)
+ g_array_sort (transition->priv->frames, sort_by_key);
+}
+
+static inline void
+clutter_keyframe_transition_init_frames (ClutterKeyframeTransition *transition,
+ gssize n_key_frames)
+{
+ ClutterKeyframeTransitionPrivate *priv = transition->priv;
+ guint i;
+
+ priv->frames = g_array_sized_new (FALSE, FALSE,
+ sizeof (KeyFrame),
+ n_key_frames);
+ g_array_set_clear_func (priv->frames, key_frame_free);
+
+ /* we add an implicit key frame that goes to 1.0, so that the
+ * user doesn't have to do that an can simply add key frames
+ * in between 0.0 and 1.0
+ */
+ for (i = 0; i < n_key_frames + 1; i++)
+ {
+ KeyFrame frame;
+
+ if (i == n_key_frames)
+ frame.key = 1.0;
+ else
+ frame.key = 0.0;
+
+ frame.mode = CLUTTER_LINEAR;
+ frame.interval = NULL;
+
+ g_array_insert_val (priv->frames, i, frame);
+ }
+}
+
+static inline void
+clutter_keyframe_transition_update_frames (ClutterKeyframeTransition *transition)
+{
+ ClutterKeyframeTransitionPrivate *priv = transition->priv;
+ guint i;
+
+ if (priv->frames == NULL)
+ return;
+
+ for (i = 0; i < priv->frames->len; i++)
+ {
+ KeyFrame *cur_frame = &g_array_index (priv->frames, KeyFrame, i);
+ KeyFrame *prev_frame;
+
+ if (i > 0)
+ prev_frame = &g_array_index (priv->frames, KeyFrame, i - 1);
+ else
+ prev_frame = NULL;
+
+ if (prev_frame != NULL)
+ {
+ cur_frame->start = prev_frame->key;
+
+ if (prev_frame->interval != NULL)
+ {
+ const GValue *value;
+
+ value = clutter_interval_peek_final_value (prev_frame->interval);
+
+ if (cur_frame->interval != NULL)
+ clutter_interval_set_initial_value (cur_frame->interval, value);
+ else
+ {
+ cur_frame->interval =
+ clutter_interval_new_with_values (G_VALUE_TYPE (value), value, NULL);
+ }
+ }
+ }
+ else
+ cur_frame->start = 0.0;
+
+ cur_frame->end = cur_frame->key;
+ }
+}
+
+static void
+clutter_keyframe_transition_compute_value (ClutterTransition *transition,
+ ClutterAnimatable *animatable,
+ ClutterInterval *interval,
+ gdouble progress)
+{
+ ClutterKeyframeTransition *self = CLUTTER_KEYFRAME_TRANSITION (transition);
+ ClutterTimeline *timeline = CLUTTER_TIMELINE (transition);
+ ClutterKeyframeTransitionPrivate *priv = self->priv;
+ ClutterTransitionClass *parent_class;
+ ClutterTimelineDirection direction;
+ ClutterInterval *real_interval;
+ gdouble real_progress;
+ double t, d, p;
+ KeyFrame *cur_frame = NULL;
+
+ real_interval = interval;
+ real_progress = progress;
+
+ /* if we don't have any keyframe, we behave like our parent class */
+ if (priv->frames == NULL)
+ goto out;
+
+ direction = clutter_timeline_get_direction (timeline);
+
+ /* we need a normalized linear value */
+ t = clutter_timeline_get_elapsed_time (timeline);
+ d = clutter_timeline_get_duration (timeline);
+ p = t / d;
+
+ if (priv->current_frame < 0)
+ {
+ if (direction == CLUTTER_TIMELINE_FORWARD)
+ priv->current_frame = 0;
+ else
+ priv->current_frame = priv->frames->len - 1;
+ }
+
+ cur_frame = &g_array_index (priv->frames, KeyFrame, priv->current_frame);
+
+ /* skip to the next key frame, depending on the direction of the timeline */
+ if (direction == CLUTTER_TIMELINE_FORWARD)
+ {
+ if (p > cur_frame->end)
+ {
+ priv->current_frame = MIN (priv->current_frame + 1,
+ priv->frames->len - 1);
+
+ cur_frame = &g_array_index (priv->frames, KeyFrame, priv->current_frame);
+ }
+ }
+ else
+ {
+ if (p < cur_frame->start)
+ {
+ priv->current_frame = MAX (priv->current_frame - 1, 0);
+
+ cur_frame = &g_array_index (priv->frames, KeyFrame, priv->current_frame);
+ }
+ }
+
+ /* if we are at the boundaries of the transition, use the from and to
+ * value from the transition
+ */
+ if (priv->current_frame == 0)
+ {
+ const GValue *value;
+
+ value = clutter_interval_peek_initial_value (interval);
+ clutter_interval_set_initial_value (cur_frame->interval, value);
+ }
+ else if (priv->current_frame == priv->frames->len - 1)
+ {
+ const GValue *value;
+
+ cur_frame->mode = clutter_timeline_get_progress_mode (timeline);
+
+ value = clutter_interval_peek_final_value (interval);
+ clutter_interval_set_final_value (cur_frame->interval, value);
+ }
+
+ /* update the interval to be used to interpolate the property */
+ real_interval = cur_frame->interval;
+
+ /* normalize the progress */
+ real_progress = (p - cur_frame->start) / (cur_frame->end - cur_frame->start);
+
+#ifdef CLUTTER_ENABLE_DEBUG
+ if (CLUTTER_HAS_DEBUG (ANIMATION))
+ {
+ char *from, *to;
+ const GValue *value;
+
+ value = clutter_interval_peek_initial_value (cur_frame->interval);
+ from = g_strdup_value_contents (value);
+
+ value = clutter_interval_peek_final_value (cur_frame->interval);
+ to = g_strdup_value_contents (value);
+
+ CLUTTER_NOTE (ANIMATION,
+ "cur_frame [%d] => { %g, %s, %s %s %s } - "
+ "progress: %g, sub-progress: %g\n",
+ priv->current_frame,
+ cur_frame->key,
+ clutter_get_easing_name_for_mode (cur_frame->mode),
+ from,
+ direction == CLUTTER_TIMELINE_FORWARD ? "->" : "<-",
+ to,
+ p, real_progress);
+
+ g_free (from);
+ g_free (to);
+ }
+#endif /* CLUTTER_ENABLE_DEBUG */
+
+out:
+ parent_class =
+ CLUTTER_TRANSITION_CLASS (clutter_keyframe_transition_parent_class);
+ parent_class->compute_value (transition, animatable, real_interval, real_progress);
+}
+
+static void
+clutter_keyframe_transition_started (ClutterTimeline *timeline)
+{
+ ClutterKeyframeTransition *transition;
+
+ transition = CLUTTER_KEYFRAME_TRANSITION (timeline);
+
+ transition->priv->current_frame = -1;
+
+ clutter_keyframe_transition_sort_frames (transition);
+ clutter_keyframe_transition_update_frames (transition);
+}
+
+static void
+clutter_keyframe_transition_completed (ClutterTimeline *timeline)
+{
+ ClutterKeyframeTransitionPrivate *priv;
+
+ priv = CLUTTER_KEYFRAME_TRANSITION (timeline)->priv;
+
+ priv->current_frame = -1;
+}
+
+static void
+clutter_keyframe_transition_finalize (GObject *gobject)
+{
+ ClutterKeyframeTransitionPrivate *priv;
+
+ priv = CLUTTER_KEYFRAME_TRANSITION (gobject)->priv;
+
+ if (priv->frames != NULL)
+ g_array_unref (priv->frames);
+
+ G_OBJECT_CLASS (clutter_keyframe_transition_parent_class)->finalize (gobject);
+}
+
+static void
+clutter_keyframe_transition_class_init (ClutterKeyframeTransitionClass *klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ ClutterTimelineClass *timeline_class = CLUTTER_TIMELINE_CLASS (klass);
+ ClutterTransitionClass *transition_class = CLUTTER_TRANSITION_CLASS (klass);
+
+ g_type_class_add_private (klass, sizeof (ClutterKeyframeTransitionPrivate));
+
+ gobject_class->finalize = clutter_keyframe_transition_finalize;
+
+ timeline_class->started = clutter_keyframe_transition_started;
+ timeline_class->completed = clutter_keyframe_transition_completed;
+
+ transition_class->compute_value = clutter_keyframe_transition_compute_value;
+}
+
+static void
+clutter_keyframe_transition_init (ClutterKeyframeTransition *self)
+{
+ self->priv =
+ G_TYPE_INSTANCE_GET_PRIVATE (self, CLUTTER_TYPE_KEYFRAME_TRANSITION,
+ ClutterKeyframeTransitionPrivate);
+}
+
+/**
+ * clutter_keyframe_transition_new:
+ * @property_name: the property to animate
+ *
+ * Creates a new #ClutterKeyframeTransition for @property_name.
+ *
+ * Return value: (transfer full): the newly allocated
+ * #ClutterKeyframeTransition instance. Use g_object_unref() when
+ * done to free its resources.
+ *
+ * Since: 1.12
+ */
+ClutterTransition *
+clutter_keyframe_transition_new (const char *property_name)
+{
+ return g_object_new (CLUTTER_TYPE_KEYFRAME_TRANSITION,
+ "property-name", property_name,
+ NULL);
+}
+
+/**
+ * clutter_keyframe_transition_set_key_frames:
+ * @transition: a #ClutterKeyframeTransition
+ * @n_key_frames: the number of values
+ * @key_frames: (array length=n_key_frames): an array of keys between 0.0
+ * and 1.0, one for each key frame
+ *
+ * Sets the keys for each key frame inside @transition.
+ *
+ * If @transition does not hold any key frame, @n_key_frames key frames
+ * will be created; if @transition already has key frames, @key_frames must
+ * have at least as many elements as the number of key frames.
+ *
+ * Since: 1.12
+ */
+void
+clutter_keyframe_transition_set_key_frames (ClutterKeyframeTransition *transition,
+ guint n_key_frames,
+ const double *key_frames)
+{
+ ClutterKeyframeTransitionPrivate *priv;
+ guint i;
+
+ g_return_if_fail (CLUTTER_IS_KEYFRAME_TRANSITION (transition));
+ g_return_if_fail (n_key_frames > 0);
+ g_return_if_fail (key_frames != NULL);
+
+ priv = transition->priv;
+
+ if (priv->frames == NULL)
+ clutter_keyframe_transition_init_frames (transition, n_key_frames);
+ else
+ g_return_if_fail (n_key_frames == priv->frames->len - 1);
+
+ for (i = 0; i < n_key_frames; i++)
+ {
+ KeyFrame *frame = &g_array_index (priv->frames, KeyFrame, i);
+
+ frame->key = key_frames[i];
+ }
+}
+
+/**
+ * clutter_keyframe_transition_set_values:
+ * @transition: a #ClutterKeyframeTransition
+ * @n_values: the number of values
+ * @values: (array length=n_values): an array of values, one for each
+ * key frame
+ *
+ * Sets the values for each key frame inside @transition.
+ *
+ * If @transition does not hold any key frame, @n_values key frames will
+ * be created; if @transition already has key frames, @values must have
+ * at least as many elements as the number of key frames.
+ *
+ * Since: 1.12
+ */
+void
+clutter_keyframe_transition_set_values (ClutterKeyframeTransition *transition,
+ guint n_values,
+ const GValue *values)
+{
+ ClutterKeyframeTransitionPrivate *priv;
+ guint i;
+
+ g_return_if_fail (CLUTTER_IS_KEYFRAME_TRANSITION (transition));
+ g_return_if_fail (n_values > 0);
+ g_return_if_fail (values != NULL);
+
+ priv = transition->priv;
+
+ if (priv->frames == NULL)
+ clutter_keyframe_transition_init_frames (transition, n_values);
+ else
+ g_return_if_fail (n_values == priv->frames->len - 1);
+
+ for (i = 0; i < n_values; i++)
+ {
+ KeyFrame *frame = &g_array_index (priv->frames, KeyFrame, i);
+
+ clutter_interval_set_final_value (frame->interval, &values[i]);
+ }
+}
+
+/**
+ * clutter_keyframe_transition_set_modes:
+ * @transition: a #ClutterKeyframeTransition
+ * @n_modes: the number of easing modes
+ * @modes: (array length=n_modes): an array of easing modes, one for
+ * each key frame
+ *
+ * Sets the easing modes for each key frame inside @transition.
+ *
+ * If @transition does not hold any key frame, @n_modes key frames will
+ * be created; if @transition already has key frames, @modes must have
+ * at least as many elements as the number of key frames.
+ *
+ * Since: 1.12
+ */
+void
+clutter_keyframe_transition_set_modes (ClutterKeyframeTransition *transition,
+ guint n_modes,
+ const ClutterAnimationMode *modes)
+{
+ ClutterKeyframeTransitionPrivate *priv;
+ guint i;
+
+ g_return_if_fail (CLUTTER_IS_KEYFRAME_TRANSITION (transition));
+ g_return_if_fail (n_modes > 0);
+ g_return_if_fail (modes != NULL);
+
+ priv = transition->priv;
+
+ if (priv->frames == NULL)
+ clutter_keyframe_transition_init_frames (transition, n_modes);
+ else
+ g_return_if_fail (n_modes == priv->frames->len - 1);
+
+ for (i = 0; i < n_modes; i++)
+ {
+ KeyFrame *frame = &g_array_index (priv->frames, KeyFrame, i);
+
+ frame->mode = modes[i];
+ }
+}
+
+/**
+ * clutter_keyframe_transition_set: (skip)
+ * @transition: a #ClutterKeyframeTransition
+ * @gtype: the type of the values to use for the key frames
+ * @n_key_frames: the number of key frames between the initial
+ * and final values
+ * @...: a list of tuples, containing the key frame index, the value
+ * at the key frame, and the animation mode
+ *
+ * Sets the key frames of the @transition.
+ *
+ * This variadic arguments function is a convenience for C developers;
+ * language bindings should use clutter_keyframe_transition_set_keys(),
+ * clutter_keyframe_transition_set_modes(), and
+ * clutter_keyframe_transition_set_values() instead.
+ *
+ * Since: 1.12
+ */
+void
+clutter_keyframe_transition_set (ClutterKeyframeTransition *transition,
+ GType gtype,
+ guint n_key_frames,
+ ...)
+{
+ ClutterKeyframeTransitionPrivate *priv;
+ va_list args;
+ guint i;
+
+ g_return_if_fail (CLUTTER_IS_KEYFRAME_TRANSITION (transition));
+ g_return_if_fail (gtype != G_TYPE_INVALID);
+ g_return_if_fail (n_key_frames > 0);
+
+ priv = transition->priv;
+
+ if (priv->frames == NULL)
+ clutter_keyframe_transition_init_frames (transition, n_key_frames);
+ else
+ g_return_if_fail (n_key_frames == priv->frames->len - 1);
+
+ va_start (args, n_key_frames);
+
+ for (i = 0; i < n_key_frames; i++)
+ {
+ KeyFrame *frame = &g_array_index (priv->frames, KeyFrame, i);
+ GValue value = G_VALUE_INIT;
+ char *error = NULL;
+
+ frame->key = va_arg (args, double);
+
+ G_VALUE_COLLECT_INIT (&value, gtype, args, 0, &error);
+ if (error != NULL)
+ {
+ g_warning ("%s: %s", G_STRLOC, error);
+ g_free (error);
+ break;
+ }
+
+ frame->mode = va_arg (args, ClutterAnimationMode);
+
+ g_clear_object (&frame->interval);
+ frame->interval = clutter_interval_new_with_values (gtype, NULL, &value);
+
+ g_value_unset (&value);
+ }
+
+ va_end (args);
+}
+
+/**
+ * clutter_keyframe_transition_clear:
+ * @transition: a #ClutterKeyframeTransition
+ *
+ * Removes all key frames from @transition.
+ *
+ * Since: 1.12
+ */
+void
+clutter_keyframe_transition_clear (ClutterKeyframeTransition *transition)
+{
+ g_return_if_fail (CLUTTER_IS_KEYFRAME_TRANSITION (transition));
+
+ if (transition->priv->frames != NULL)
+ {
+ g_array_unref (transition->priv->frames);
+ transition->priv->frames = NULL;
+ }
+}
diff --git a/clutter/clutter-keyframe-transition.h b/clutter/clutter-keyframe-transition.h
new file mode 100644
index 0000000..ce1016d
--- /dev/null
+++ b/clutter/clutter-keyframe-transition.h
@@ -0,0 +1,105 @@
+/*
+ * Clutter.
+ *
+ * An OpenGL based 'interactive canvas' library.
+ *
+ * Copyright (C) 2012 Intel Corporation
+ *
+ * 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/>.
+ *
+ * Author: Emmanuele Bassi <ebassi linux intel com>
+ */
+
+#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
+#error "Only <clutter/clutter.h> can be included directly."
+#endif
+
+#ifndef __CLUTTER_KEYFRAME_TRANSITION_H__
+#define __CLUTTER_KEYFRAME_TRANSITION_H__
+
+#include <clutter/clutter-types.h>
+#include <clutter/clutter-property-transition.h>
+
+G_BEGIN_DECLS
+
+#define CLUTTER_TYPE_KEYFRAME_TRANSITION (clutter_keyframe_transition_get_type ())
+#define CLUTTER_KEYFRAME_TRANSITION(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_KEYFRAME_TRANSITION, ClutterKeyframeTransition))
+#define CLUTTER_IS_KEYFRAME_TRANSITION(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_KEYFRAME_TRANSITION))
+#define CLUTTER_KEYFRAME_TRANSITION_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_KEYFRAME_TRANSITION, ClutterKeyframeTransitionClass))
+#define CLUTTER_IS_KEYFRAME_TRANSITION_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_KEYFRAME_TRANSITION))
+#define CLUTTER_KEYFRAME_TRANSITION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_KEYFRAME_TRANSITION, ClutterKeyframeTransitionClass))
+
+typedef struct _ClutterKeyframeTransitionPrivate ClutterKeyframeTransitionPrivate;
+typedef struct _ClutterKeyframeTransitionClass ClutterKeyframeTransitionClass;
+
+/**
+ * ClutterKeyframeTransition:
+ *
+ * FIXME
+ *
+ * Since: 1.12
+ */
+struct _ClutterKeyframeTransition
+{
+ /*< private >*/
+ ClutterPropertyTransition parent_instance;
+
+ ClutterKeyframeTransitionPrivate *priv;
+};
+
+/**
+ * ClutterKeyframeTransitionClass:
+ *
+ * FIXME
+ *
+ * Since: 1.12
+ */
+struct _ClutterKeyframeTransitionClass
+{
+ /*< private >*/
+ ClutterPropertyTransitionClass parent_class;
+
+ gpointer _padding[8];
+};
+
+CLUTTER_AVAILABLE_IN_1_12
+GType clutter_keyframe_transition_get_type (void) G_GNUC_CONST;
+
+CLUTTER_AVAILABLE_IN_1_12
+ClutterTransition * clutter_keyframe_transition_new (const char *property_name);
+
+CLUTTER_AVAILABLE_IN_1_12
+void clutter_keyframe_transition_set_key_frames (ClutterKeyframeTransition *transition,
+ guint n_key_frames,
+ const double *key_frames);
+CLUTTER_AVAILABLE_IN_1_12
+void clutter_keyframe_transition_set_values (ClutterKeyframeTransition *transition,
+ guint n_values,
+ const GValue *values);
+CLUTTER_AVAILABLE_IN_1_12
+void clutter_keyframe_transition_set_modes (ClutterKeyframeTransition *transition,
+ guint n_modes,
+ const ClutterAnimationMode *modes);
+CLUTTER_AVAILABLE_IN_1_12
+void clutter_keyframe_transition_set (ClutterKeyframeTransition *transition,
+ GType gtype,
+ guint n_key_frames,
+ ...);
+
+CLUTTER_AVAILABLE_IN_1_12
+void clutter_keyframe_transition_clear (ClutterKeyframeTransition *transition);
+
+G_END_DECLS
+
+#endif /* __CLUTTER_KEYFRAME_TRANSITION_H__ */
diff --git a/clutter/clutter-types.h b/clutter/clutter-types.h
index a3092ce..124d675 100644
--- a/clutter/clutter-types.h
+++ b/clutter/clutter-types.h
@@ -64,6 +64,7 @@ typedef struct _ClutterState ClutterState;
typedef struct _ClutterTimeline ClutterTimeline;
typedef struct _ClutterTransition ClutterTransition;
typedef struct _ClutterPropertyTransition ClutterPropertyTransition;
+typedef struct _ClutterKeyframeTransition ClutterKeyframeTransition;
typedef struct _ClutterAction ClutterAction;
typedef struct _ClutterConstraint ClutterConstraint;
diff --git a/clutter/clutter.h b/clutter/clutter.h
index 34788e3..262bc71 100644
--- a/clutter/clutter.h
+++ b/clutter/clutter.h
@@ -73,6 +73,7 @@
#include "clutter-image.h"
#include "clutter-input-device.h"
#include "clutter-interval.h"
+#include "clutter-keyframe-transition.h"
#include "clutter-keysyms.h"
#include "clutter-layout-manager.h"
#include "clutter-layout-meta.h"
diff --git a/clutter/clutter.symbols b/clutter/clutter.symbols
index 6da9a4b..0614393 100644
--- a/clutter/clutter.symbols
+++ b/clutter/clutter.symbols
@@ -792,6 +792,13 @@ clutter_input_device_type_get_type
clutter_input_device_ungrab
clutter_input_device_update_from_event
clutter_input_mode_get_type
+clutter_keyframe_transition_clear
+clutter_keyframe_transition_get_type
+clutter_keyframe_transition_new
+clutter_keyframe_transition_set_key_frames
+clutter_keyframe_transition_set_modes
+clutter_keyframe_transition_set_values
+clutter_keyframe_transition_set
clutter_keysym_to_unicode
clutter_knot_copy
clutter_knot_equal
@@ -1374,8 +1381,12 @@ clutter_transition_get_interval
clutter_transition_get_type
clutter_transition_get_remove_on_complete
clutter_transition_set_animatable
+clutter_transition_set_from_value
+clutter_transition_set_from
clutter_transition_set_interval
clutter_transition_set_remove_on_complete
+clutter_transition_set_to_value
+clutter_transition_set_to
clutter_ungrab_keyboard
clutter_ungrab_pointer
clutter_ungrab_pointer_for_device
diff --git a/doc/reference/clutter/clutter-docs.xml.in b/doc/reference/clutter/clutter-docs.xml.in
index 0700c77..88f0aef 100644
--- a/doc/reference/clutter/clutter-docs.xml.in
+++ b/doc/reference/clutter/clutter-docs.xml.in
@@ -150,11 +150,11 @@
<title>Base classes</title>
<xi:include href="xml/clutter-timeline.xml"/>
- <xi:include href="xml/clutter-alpha.xml"/>
<xi:include href="xml/clutter-interval.xml"/>
- <xi:include href="xml/clutter-transition.xml"/>
<xi:include href="xml/clutter-animatable.xml"/>
+ <xi:include href="xml/clutter-transition.xml"/>
<xi:include href="xml/clutter-property-transition.xml"/>
+ <xi:include href="xml/clutter-keyframe-transition.xml"/>
</chapter>
<chapter>
@@ -259,6 +259,7 @@
<xi:include href="xml/clutter-score.xml"/>
<xi:include href="xml/clutter-shader.xml"/>
+ <xi:include href="xml/clutter-alpha.xml"/>
<xi:include href="xml/clutter-behaviour.xml"/>
<xi:include href="xml/clutter-behaviour-depth.xml"/>
<xi:include href="xml/clutter-behaviour-ellipse.xml"/>
diff --git a/doc/reference/clutter/clutter-sections.txt b/doc/reference/clutter/clutter-sections.txt
index f362b5b..c69b3e0 100644
--- a/doc/reference/clutter/clutter-sections.txt
+++ b/doc/reference/clutter/clutter-sections.txt
@@ -3161,3 +3161,25 @@ ClutterImagePrivate
clutter_image_get_type
clutter_image_error_quark
</SECTION>
+
+<SECTION>
+<FILE>clutter-keyframe-transition</FILE>
+ClutterKeyframeTransition
+ClutterKeyframeTransitionClass
+clutter_keyframe_transition_new
+clutter_keyframe_transition_set
+clutter_keyframe_transition_set_key_frames
+clutter_keyframe_transition_set_modes
+clutter_keyframe_transition_set_values
+clutter_keyframe_transition_clear
+<SECTION Standard>
+CLUTTER_TYPE_KEYFRAME_TRANSITION
+CLUTTER_KEYFRAME_TRANSITION
+CLUTTER_KEYFRAME_TRANSITION_CLASS
+CLUTTER_IS_KEYFRAME_TRANSITION
+CLUTTER_IS_KEYFRAME_TRANSITION_CLASS
+CLUTTER_KEYFRAME_TRANSITION_GET_CLASS
+<SUBSECTION Private>
+ClutterKeyframeTransitionPrivate
+clutter_keyframe_transition_get_type
+</SECTION>
diff --git a/doc/reference/clutter/clutter.types b/doc/reference/clutter/clutter.types
index d81be12..f94fc39 100644
--- a/doc/reference/clutter/clutter.types
+++ b/doc/reference/clutter/clutter.types
@@ -43,6 +43,7 @@ clutter_gesture_action_get_type
clutter_group_get_type
clutter_input_device_get_type
clutter_interval_get_type
+clutter_keyframe_transition_get_type
clutter_layout_manager_get_type
clutter_layout_meta_get_type
clutter_list_model_get_type
diff --git a/tests/interactive/Makefile.am b/tests/interactive/Makefile.am
index 2c38e30..1dfef93 100644
--- a/tests/interactive/Makefile.am
+++ b/tests/interactive/Makefile.am
@@ -58,7 +58,8 @@ UNIT_TESTS = \
test-actor.c \
test-transitions.c \
test-content.c \
- test-canvas.c
+ test-canvas.c \
+ test-keyframe-transition.c
if X11_TESTS
UNIT_TESTS += test-pixmap.c
diff --git a/tests/interactive/test-keyframe-transition.c b/tests/interactive/test-keyframe-transition.c
new file mode 100644
index 0000000..aeef548
--- /dev/null
+++ b/tests/interactive/test-keyframe-transition.c
@@ -0,0 +1,77 @@
+#include <stdlib.h>
+#include <gmodule.h>
+#include <clutter/clutter.h>
+
+static const ClutterColor colors[] = {
+ { 255, 0, 0, 255 },
+ { 0, 255, 0, 255 },
+ { 0, 0, 255, 255 },
+};
+
+#define PADDING (64.0f)
+#define SIZE (64.0f)
+
+G_MODULE_EXPORT const char *
+test_keyframe_transition_describe (void)
+{
+ return "Demonstrate the keyframe transition.";
+}
+
+G_MODULE_EXPORT int
+test_keyframe_transition_main (int argc, char *argv[])
+{
+ ClutterActor *stage;
+ int i;
+
+ if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
+ return EXIT_FAILURE;
+
+ stage = clutter_stage_new ();
+ clutter_stage_set_title (CLUTTER_STAGE (stage), "Keyframe Transitions");
+ g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
+
+ for (i = 0; i < 3; i++)
+ {
+ ClutterTransition *transition;
+ ClutterActor *rect;
+ float cur_x, cur_y;
+ float new_x;
+
+ cur_x = PADDING;
+ cur_y = PADDING + ((SIZE + PADDING) * i);
+
+ new_x = clutter_actor_get_width (stage) - PADDING - SIZE;
+
+ rect = clutter_actor_new ();
+
+ clutter_actor_set_background_color (rect, &colors[i]);
+ clutter_actor_set_size (rect, SIZE, SIZE);
+ clutter_actor_set_position (rect, PADDING, cur_y);
+ clutter_actor_add_child (stage, rect);
+
+ clutter_actor_save_easing_state (rect);
+ clutter_actor_set_easing_duration (rect, 2000);
+ clutter_actor_set_easing_mode (rect, CLUTTER_LINEAR);
+
+ transition = clutter_keyframe_transition_new ("x");
+ clutter_transition_set_from (transition, G_TYPE_FLOAT, cur_x);
+ clutter_transition_set_to (transition, G_TYPE_FLOAT, new_x);
+
+ clutter_keyframe_transition_set (CLUTTER_KEYFRAME_TRANSITION (transition),
+ G_TYPE_FLOAT, 1,
+ 0.5, new_x / 2.0f, CLUTTER_EASE_OUT_EXPO);
+
+ clutter_timeline_set_repeat_count (CLUTTER_TIMELINE (transition), 1);
+ clutter_timeline_set_auto_reverse (CLUTTER_TIMELINE (transition), TRUE);
+
+ clutter_actor_add_transition (rect, "horizAnimation", transition);
+
+ clutter_actor_restore_easing_state (rect);
+ }
+
+ clutter_actor_show (stage);
+
+ clutter_main ();
+
+ return EXIT_SUCCESS;
+}
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