diff options
Diffstat (limited to 'clutter/clutter/clutter-clone.c')
| -rw-r--r-- | clutter/clutter/clutter-clone.c | 469 |
1 files changed, 0 insertions, 469 deletions
diff --git a/clutter/clutter/clutter-clone.c b/clutter/clutter/clutter-clone.c deleted file mode 100644 index 42e3e07cd..000000000 --- a/clutter/clutter/clutter-clone.c +++ /dev/null @@ -1,469 +0,0 @@ -/* - * Clutter. - * - * An OpenGL based 'interactive canvas' library. - * - * Copyright (C) 2008 Intel Corporation. - * - * Authored By: Robert Bragg <robert@linux.intel.com> - * - * 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/>. - */ - -/** - * SECTION:clutter-clone - * @short_description: An actor that displays a clone of a source actor - * - * #ClutterClone is a #ClutterActor which draws with the paint - * function of another actor, scaled to fit its own allocation. - * - * #ClutterClone can be used to efficiently clone any other actor. - * - * Unlike clutter_texture_new_from_actor(), #ClutterClone does not require - * the presence of support for FBOs in the underlying GL or GLES - * implementation. - * - * #ClutterClone is available since Clutter 1.0 - */ - -#include "clutter-build-config.h" - -#include "clutter-actor-private.h" -#include "clutter-clone.h" -#include "clutter-debug.h" -#include "clutter-main.h" -#include "clutter-paint-volume-private.h" -#include "clutter-private.h" - -#include "cogl/cogl.h" - -struct _ClutterClonePrivate -{ - ClutterActor *clone_source; - float x_scale, y_scale; - - gulong source_destroy_id; -}; - -G_DEFINE_TYPE_WITH_PRIVATE (ClutterClone, clutter_clone, CLUTTER_TYPE_ACTOR) - -enum -{ - PROP_0, - - PROP_SOURCE, - - PROP_LAST -}; - -static GParamSpec *obj_props[PROP_LAST]; - -static void clutter_clone_set_source_internal (ClutterClone *clone, - ClutterActor *source); -static void -clutter_clone_get_preferred_width (ClutterActor *self, - gfloat for_height, - gfloat *min_width_p, - gfloat *natural_width_p) -{ - ClutterClonePrivate *priv = CLUTTER_CLONE (self)->priv; - ClutterActor *clone_source = priv->clone_source; - - if (clone_source == NULL) - { - if (min_width_p) - *min_width_p = 0; - - if (natural_width_p) - *natural_width_p = 0; - } - else - clutter_actor_get_preferred_width (clone_source, - for_height, - min_width_p, - natural_width_p); -} - -static void -clutter_clone_get_preferred_height (ClutterActor *self, - gfloat for_width, - gfloat *min_height_p, - gfloat *natural_height_p) -{ - ClutterClonePrivate *priv = CLUTTER_CLONE (self)->priv; - ClutterActor *clone_source = priv->clone_source; - - if (clone_source == NULL) - { - if (min_height_p) - *min_height_p = 0; - - if (natural_height_p) - *natural_height_p = 0; - } - else - clutter_actor_get_preferred_height (clone_source, - for_width, - min_height_p, - natural_height_p); -} - -static void -clutter_clone_apply_transform (ClutterActor *self, - graphene_matrix_t *matrix) -{ - ClutterClonePrivate *priv = CLUTTER_CLONE (self)->priv; - - - if (priv->clone_source) - graphene_matrix_scale (matrix, priv->x_scale, priv->y_scale, 1.f); - - CLUTTER_ACTOR_CLASS (clutter_clone_parent_class)->apply_transform (self, - matrix); -} - -static void -clutter_clone_paint (ClutterActor *actor, - ClutterPaintContext *paint_context) -{ - ClutterClone *self = CLUTTER_CLONE (actor); - ClutterClonePrivate *priv = self->priv; - gboolean was_unmapped = FALSE; - - if (priv->clone_source == NULL) - return; - - CLUTTER_NOTE (PAINT, "painting clone actor '%s'", - _clutter_actor_get_debug_name (actor)); - - /* The final bits of magic: - * - We need to override the paint opacity of the actor with our own - * opacity. - * - We need to inform the actor that it's in a clone paint (for the function - * clutter_actor_is_in_clone_paint()) - * - We need to stop clutter_actor_paint applying the model view matrix of - * the clone source actor. - */ - _clutter_actor_set_in_clone_paint (priv->clone_source, TRUE); - clutter_actor_set_opacity_override (priv->clone_source, - clutter_actor_get_paint_opacity (actor)); - _clutter_actor_set_enable_model_view_transform (priv->clone_source, FALSE); - - if (!clutter_actor_is_mapped (priv->clone_source)) - { - _clutter_actor_set_enable_paint_unmapped (priv->clone_source, TRUE); - was_unmapped = TRUE; - } - - /* If the source isn't ultimately parented to a toplevel, it can't be - * realized or painted. - */ - if (clutter_actor_is_realized (priv->clone_source)) - { - _clutter_actor_push_clone_paint (); - clutter_actor_paint (priv->clone_source, paint_context); - _clutter_actor_pop_clone_paint (); - } - - if (was_unmapped) - _clutter_actor_set_enable_paint_unmapped (priv->clone_source, FALSE); - - _clutter_actor_set_enable_model_view_transform (priv->clone_source, TRUE); - clutter_actor_set_opacity_override (priv->clone_source, -1); - _clutter_actor_set_in_clone_paint (priv->clone_source, FALSE); -} - -static gboolean -clutter_clone_get_paint_volume (ClutterActor *actor, - ClutterPaintVolume *volume) -{ - ClutterClonePrivate *priv = CLUTTER_CLONE (actor)->priv; - const ClutterPaintVolume *source_volume; - - /* if the source is not set the paint volume is defined to be empty */ - if (priv->clone_source == NULL) - return TRUE; - - /* query the volume of the source actor and simply masquerade it as - * the clones volume... */ - source_volume = clutter_actor_get_paint_volume (priv->clone_source); - if (source_volume == NULL) - return FALSE; - - _clutter_paint_volume_set_from_volume (volume, source_volume); - _clutter_paint_volume_set_reference_actor (volume, actor); - - return TRUE; -} - -static gboolean -clutter_clone_has_overlaps (ClutterActor *actor) -{ - ClutterClonePrivate *priv = CLUTTER_CLONE (actor)->priv; - - /* The clone has overlaps iff the source has overlaps */ - - if (priv->clone_source == NULL) - return FALSE; - - return clutter_actor_has_overlaps (priv->clone_source); -} - -static void -clutter_clone_allocate (ClutterActor *self, - const ClutterActorBox *box) -{ - ClutterClonePrivate *priv = CLUTTER_CLONE (self)->priv; - ClutterActorClass *parent_class; - ClutterActorBox source_box; - float x_scale, y_scale; - - /* chain up */ - parent_class = CLUTTER_ACTOR_CLASS (clutter_clone_parent_class); - parent_class->allocate (self, box); - - if (priv->clone_source == NULL) - return; - - /* ClutterActor delays allocating until the actor is shown; however - * we cannot paint it correctly in that case, so force an allocation. - */ - if (clutter_actor_get_parent (priv->clone_source) != NULL && - !clutter_actor_has_allocation (priv->clone_source)) - { - float x = 0.f; - float y = 0.f; - - clutter_actor_get_fixed_position (priv->clone_source, &x, &y); - clutter_actor_allocate_preferred_size (priv->clone_source, x, y); - } - - clutter_actor_get_allocation_box (priv->clone_source, &source_box); - - /* We need to scale what the clone-source actor paints to fill our own - * allocation... - */ - x_scale = clutter_actor_box_get_width (box) - / clutter_actor_box_get_width (&source_box); - y_scale = clutter_actor_box_get_height (box) - / clutter_actor_box_get_height (&source_box); - - if (!G_APPROX_VALUE (priv->x_scale, x_scale, FLT_EPSILON) || - !G_APPROX_VALUE (priv->y_scale, y_scale, FLT_EPSILON)) - { - priv->x_scale = x_scale; - priv->y_scale = y_scale; - clutter_actor_invalidate_transform (CLUTTER_ACTOR (self)); - } - -#if 0 - /* XXX - this is wrong: ClutterClone cannot clone unparented - * actors, as it will break all invariants - */ - - /* we act like a "foster parent" for the source we are cloning; - * if the source has not been parented we have to force an - * allocation on it, so that we can paint it correctly from - * within our paint() implementation. since the actor does not - * have a parent, and thus it won't be painted by the usual - * paint cycle, we can safely give it as much size as it requires - */ - if (clutter_actor_get_parent (priv->clone_source) == NULL) - clutter_actor_allocate_preferred_size (priv->clone_source); -#endif -} - -static void -clutter_clone_set_property (GObject *gobject, - guint prop_id, - const GValue *value, - GParamSpec *pspec) -{ - ClutterClone *self = CLUTTER_CLONE (gobject); - - switch (prop_id) - { - case PROP_SOURCE: - clutter_clone_set_source (self, g_value_get_object (value)); - break; - - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec); - break; - } -} - -static void -clutter_clone_get_property (GObject *gobject, - guint prop_id, - GValue *value, - GParamSpec *pspec) -{ - ClutterClonePrivate *priv = CLUTTER_CLONE (gobject)->priv; - - switch (prop_id) - { - case PROP_SOURCE: - g_value_set_object (value, priv->clone_source); - break; - - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec); - break; - } -} - -static void -clutter_clone_dispose (GObject *gobject) -{ - clutter_clone_set_source_internal (CLUTTER_CLONE (gobject), NULL); - - G_OBJECT_CLASS (clutter_clone_parent_class)->dispose (gobject); -} - -static void -clutter_clone_class_init (ClutterCloneClass *klass) -{ - GObjectClass *gobject_class = G_OBJECT_CLASS (klass); - ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass); - - actor_class->apply_transform = clutter_clone_apply_transform; - actor_class->paint = clutter_clone_paint; - actor_class->get_paint_volume = clutter_clone_get_paint_volume; - actor_class->get_preferred_width = clutter_clone_get_preferred_width; - actor_class->get_preferred_height = clutter_clone_get_preferred_height; - actor_class->allocate = clutter_clone_allocate; - actor_class->has_overlaps = clutter_clone_has_overlaps; - - gobject_class->dispose = clutter_clone_dispose; - gobject_class->set_property = clutter_clone_set_property; - gobject_class->get_property = clutter_clone_get_property; - - /** - * ClutterClone:source: - * - * This property specifies the source actor being cloned. - * - * Since: 1.0 - */ - obj_props[PROP_SOURCE] = - g_param_spec_object ("source", - P_("Source"), - P_("Specifies the actor to be cloned"), - CLUTTER_TYPE_ACTOR, - G_PARAM_CONSTRUCT | - CLUTTER_PARAM_READWRITE); - - g_object_class_install_properties (gobject_class, PROP_LAST, obj_props); -} - -static void -clutter_clone_init (ClutterClone *self) -{ - self->priv = clutter_clone_get_instance_private (self); - - self->priv->x_scale = 1.f; - self->priv->y_scale = 1.f; -} - -/** - * clutter_clone_new: - * @source: a #ClutterActor, or %NULL - * - * Creates a new #ClutterActor which clones @source/ - * - * Return value: the newly created #ClutterClone - * - * Since: 1.0 - */ -ClutterActor * -clutter_clone_new (ClutterActor *source) -{ - return g_object_new (CLUTTER_TYPE_CLONE, "source", source, NULL); -} - -static void -on_source_destroyed (ClutterActor *source, - ClutterClone *self) -{ - clutter_clone_set_source_internal (self, NULL); -} - -static void -clutter_clone_set_source_internal (ClutterClone *self, - ClutterActor *source) -{ - ClutterClonePrivate *priv = self->priv; - - if (priv->clone_source == source) - return; - - if (priv->clone_source != NULL) - { - g_clear_signal_handler (&priv->source_destroy_id, priv->clone_source); - _clutter_actor_detach_clone (priv->clone_source, CLUTTER_ACTOR (self)); - g_object_unref (priv->clone_source); - priv->clone_source = NULL; - } - - if (source != NULL) - { - priv->clone_source = g_object_ref (source); - _clutter_actor_attach_clone (priv->clone_source, CLUTTER_ACTOR (self)); - priv->source_destroy_id = g_signal_connect (priv->clone_source, "destroy", - G_CALLBACK (on_source_destroyed), self); - } - - g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_SOURCE]); - - clutter_actor_queue_relayout (CLUTTER_ACTOR (self)); -} - -/** - * clutter_clone_set_source: - * @self: a #ClutterClone - * @source: (allow-none): a #ClutterActor, or %NULL - * - * Sets @source as the source actor to be cloned by @self. - * - * Since: 1.0 - */ -void -clutter_clone_set_source (ClutterClone *self, - ClutterActor *source) -{ - g_return_if_fail (CLUTTER_IS_CLONE (self)); - g_return_if_fail (source == NULL || CLUTTER_IS_ACTOR (source)); - - clutter_clone_set_source_internal (self, source); - clutter_actor_queue_relayout (CLUTTER_ACTOR (self)); -} - -/** - * clutter_clone_get_source: - * @self: a #ClutterClone - * - * Retrieves the source #ClutterActor being cloned by @self. - * - * Return value: (transfer none): the actor source for the clone - * - * Since: 1.0 - */ -ClutterActor * -clutter_clone_get_source (ClutterClone *self) -{ - g_return_val_if_fail (CLUTTER_IS_CLONE (self), NULL); - - return self->priv->clone_source; -} |