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mutter/clutter/clutter-actor.c
Emmanuele Bassi 98c537365c 2007-12-17 Emmanuele Bassi <ebassi@openedhand.com> 
* clutter/clutter-actor.c:
	(clutter_actor_should_pick_paint),
	(clutter_actor_apply_transform_to_point): Fix the whitespace.

	(clutter_actor_set_rotation): Clarify that the coordinates of
	the centre of rotation are relative to the anchor point or,
	if not set, to the upper left corner of the bounding box.
2007-12-17 17:45:49 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 OpenedHand
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:clutter-actor
* @short_description: Base abstract class for all visual stage actors.
*
* #ClutterActor is a base abstract class for all visual elements on the
* stage. Every object that must appear on the main #ClutterStage must also
* be a #ClutterActor, either by using one of the classes provided by
* Clutter, or by implementing a new #ClutterActor subclass.
*
* Actor Transformations
* The OpenGL modelview matrix for the actor is constructed from the actor
* settings by the following order of operations:
* <orderedlist>
* <listitem><para>Translation by actor x, y coords,</para></listitem>
* <listitem><para>Scaling by scale_x, scale_y,</para></listitem>
* <listitem><para>Negative translation by anchor point x, y,</para>
* </listitem>
* <listitem><para>Rotation around z axis,</para></listitem>
* <listitem><para>Rotation around y axis,</para></listitem>
* <listitem><para>Rotation around x axis,</para></listitem>
* <listitem><para>Translation by actor depth (z),</para></listitem>
* <listitem><para>Clip stencil is applied (not an operation on the matrix
* as such, but done as part of the transform set up).</para>
* </listitem>
* </orderedlist>
*
* Event handling
* <orderedlist>
* <listitem><para>Actors emit pointer events if set reactive, see
* clutter_actor_set_reactive()</para></listitem>
* <listitem><para>The stage is always reactive</para></listitem>
* <listitem><para>Events are handled by connecting signal handlers to
* the numerous event signal types.</para></listitem>
* <listitem><para>Event handlers must return %TRUE if they handled
* the event and wish to block the event emission chain, or %FALSE
* if the emission chain must continue</para></listitem>
* <listitem><para>Keyboard events are emitted if actor has focus, see
* clutter_stage_set_key_focus()</para></listitem>
* <listitem><para>Motion events (motion, enter, leave) are not emitted
* if clutter_set_motion_events_enabled() is called with %FALSE.
* See clutter_set_motion_events_enabled() documentation for more
* information.</para></listitem>
* <listitem><para>Once emitted, an event emission chain has two
* phases: capture and bubble. A emitted event starts in the capture
* phase beginning at the stage and traversing every child actor until
* the event source actor is reached. The emission then enters the bubble
* phase, traversing back up the chain via parents until it reaches the
* stage. Any event handler can abort this chain by returning
* %TRUE (meaning "event handled").</para></listitem>
* <listitem><para>Pointer events will 'pass through' non reactive
* overlapping actors.</para></listitem>
* </orderedlist>
*/
/**
* CLUTTER_ACTOR_IS_MAPPED:
* @e: a #ClutterActor
*
* Evaluates to %TRUE if the %CLUTTER_ACTOR_MAPPED flag is set.
*
* Since: 0.2
*/
/**
* CLUTTER_ACTOR_IS_REALIZED:
* @e: a #ClutterActor
*
* Evaluates to %TRUE if the %CLUTTER_ACTOR_REALIZED flag is set.
*
* Since: 0.2
*/
/**
* CLUTTER_ACTOR_IS_VISIBLE:
* @e: a #ClutterActor
*
* Evaluates to %TRUE if the actor is both realized and mapped.
*
* Since: 0.2
*/
/**
* CLUTTER_ACTOR_IS_REACTIVE:
* @e: a #ClutterActor
*
* Evaluates to %TRUE if the %CLUTTER_ACTOR_REACTIVE flag is set.
*
* Since: 0.6
*/
/**
* CLUTTER_ACTOR_SET_FLAGS:
* @e: a #ClutterActor
* @f: the flags to set
*
* Sets flags on the given #ClutterActor
*
* Since: 0.2
*/
/**
* CLUTTER_ACTOR_UNSET_FLAGS:
* @e: a #ClutterActor
* @f: the flags to unset
*
* Unsets flags on the given #ClutterActor
*
* Since: 0.2
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-actor.h"
#include "clutter-container.h"
#include "clutter-main.h"
#include "clutter-enum-types.h"
#include "clutter-scriptable.h"
#include "clutter-script.h"
#include "clutter-marshal.h"
#include "clutter-private.h"
#include "clutter-debug.h"
#include "clutter-units.h"
#include "cogl.h"
static guint32 __id = 0;
#define CLUTTER_ACTOR_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_ACTOR, ClutterActorPrivate))
typedef struct _ShaderData ShaderData;
struct _ClutterActorPrivate
{
ClutterActorBox coords;
ClutterGeometry clip; /* FIXME: Should be Units */
guint has_clip : 1;
ClutterFixed rxang, ryang, rzang; /* Rotation*/
ClutterUnit rzx, rzy, rxy, rxz, ryx, ryz;
ClutterUnit z;
guint8 opacity;
ClutterActor *parent_actor;
gchar *name;
ClutterFixed scale_x, scale_y;
guint32 id; /* Unique ID */
ShaderData *shader_data;
ClutterUnit anchor_x, anchor_y;
};
enum
{
PROP_0,
PROP_NAME,
PROP_X,
PROP_Y,
PROP_WIDTH,
PROP_HEIGHT,
PROP_DEPTH,
PROP_CLIP,
PROP_HAS_CLIP,
PROP_OPACITY,
PROP_VISIBLE,
PROP_REACTIVE,
PROP_SCALE_X,
PROP_SCALE_Y,
PROP_ROTATION_ANGLE_X,
PROP_ROTATION_ANGLE_Y,
PROP_ROTATION_ANGLE_Z,
PROP_ROTATION_CENTER_X,
PROP_ROTATION_CENTER_Y,
PROP_ROTATION_CENTER_Z
};
enum
{
SHOW,
HIDE,
DESTROY,
PARENT_SET,
FOCUS_IN,
FOCUS_OUT,
EVENT,
CAPTURED_EVENT,
BUTTON_PRESS_EVENT,
BUTTON_RELEASE_EVENT,
SCROLL_EVENT,
KEY_PRESS_EVENT,
KEY_RELEASE_EVENT,
MOTION_EVENT,
ENTER_EVENT,
LEAVE_EVENT,
LAST_SIGNAL
};
static guint actor_signals[LAST_SIGNAL] = { 0, };
static void clutter_scriptable_iface_init (ClutterScriptableIface *iface);
static void _clutter_actor_apply_modelview_transform (ClutterActor *self);
static void _clutter_actor_apply_modelview_transform_recursive (ClutterActor *self);
static void clutter_actor_shader_pre_paint (ClutterActor *actor,
gboolean repeat);
static void clutter_actor_shader_post_paint (ClutterActor *actor);
static void destroy_shader_data (ClutterActor *self);
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (ClutterActor,
clutter_actor,
G_TYPE_INITIALLY_UNOWNED,
G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_SCRIPTABLE,
clutter_scriptable_iface_init));
static gboolean
redraw_update_idle (gpointer data)
{
ClutterMainContext *ctx = CLUTTER_CONTEXT();
if (ctx->update_idle)
{
g_source_remove (ctx->update_idle);
ctx->update_idle = 0;
}
clutter_redraw ();
return FALSE;
}
static void
clutter_actor_real_show (ClutterActor *self)
{
if (!CLUTTER_ACTOR_IS_VISIBLE (self))
{
if (!CLUTTER_ACTOR_IS_REALIZED (self))
clutter_actor_realize (self);
/* the mapped flag on the top-level actors is set by the
* per-backend implementation because it might be asynchronous
*/
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL))
CLUTTER_ACTOR_SET_FLAGS (self, CLUTTER_ACTOR_MAPPED);
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (self);
}
}
/**
* clutter_actor_show
* @self: A #ClutterActor
*
* Flags a clutter actor to be displayed. An actor not shown will not
* appear on the display.
**/
void
clutter_actor_show (ClutterActor *self)
{
if (!CLUTTER_ACTOR_IS_VISIBLE (self))
{
g_object_ref (self);
g_signal_emit (self, actor_signals[SHOW], 0);
g_object_notify (G_OBJECT (self), "visible");
g_object_unref (self);
}
}
/**
* clutter_actor_show_all:
* @self: a #ClutterActor
*
* Call show() on all children of a actor (if any).
*
* Since: 0.2
*/
void
clutter_actor_show_all (ClutterActor *self)
{
ClutterActorClass *klass;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
klass = CLUTTER_ACTOR_GET_CLASS (self);
if (klass->show_all)
klass->show_all (self);
}
void
clutter_actor_real_hide (ClutterActor *self)
{
if (CLUTTER_ACTOR_IS_VISIBLE (self))
{
/* see comment in clutter_actor_real_show() on why we don't set
* the mapped flag on the top-level actors
*/
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL))
CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_MAPPED);
clutter_actor_queue_redraw (self);
}
}
/**
* clutter_actor_hide
* @self: A #ClutterActor
*
* Flags a clutter actor to be hidden. An actor not shown will not
* appear on the display.
**/
void
clutter_actor_hide (ClutterActor *self)
{
if (CLUTTER_ACTOR_IS_VISIBLE (self))
{
g_object_ref (self);
if (CLUTTER_ACTOR_IS_REACTIVE(self))
; /* FIXME: decrease global reactive count */
g_signal_emit (self, actor_signals[HIDE], 0);
g_object_notify (G_OBJECT (self), "visible");
g_object_unref (self);
}
}
/**
* clutter_actor_hide_all:
* @self: a #ClutterActor
*
* Call hide() on all child actors (if any).
*
* Since: 0.2
*/
void
clutter_actor_hide_all (ClutterActor *self)
{
ClutterActorClass *klass;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
klass = CLUTTER_ACTOR_GET_CLASS (self);
if (klass->hide_all)
klass->hide_all (self);
}
/**
* clutter_actor_realize
* @self: A #ClutterActor
*
* Creates any underlying graphics resources needed by the actor to be
* displayed.
**/
void
clutter_actor_realize (ClutterActor *self)
{
ClutterActorClass *klass;
if (CLUTTER_ACTOR_IS_REALIZED (self))
return;
CLUTTER_ACTOR_SET_FLAGS (self, CLUTTER_ACTOR_REALIZED);
klass = CLUTTER_ACTOR_GET_CLASS (self);
if (klass->realize)
(klass->realize) (self);
}
/**
* clutter_actor_unrealize
* @self: A #ClutterActor
*
* Frees up any underlying graphics resources needed by the actor to be
* displayed.
**/
void
clutter_actor_unrealize (ClutterActor *self)
{
ClutterActorClass *klass;
if (!CLUTTER_ACTOR_IS_REALIZED (self))
return;
CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_REALIZED);
klass = CLUTTER_ACTOR_GET_CLASS (self);
if (klass->unrealize)
(klass->unrealize) (self);
}
static void
clutter_actor_real_pick (ClutterActor *self,
const ClutterColor *color)
{
if (clutter_actor_should_pick_paint (self))
{
cogl_color (color);
cogl_rectangle (0,
0,
clutter_actor_get_width(self),
clutter_actor_get_height(self));
}
}
/**
* clutter_actor_pick:
* @self: A #ClutterActor
* @color: A #ClutterColor
*
* Renders a silhouette of the actor in supplied color. Used internally for
* mapping pointer events to actors.
*
* This function should not never be called directly by applications.
*
* Subclasses overiding this method should call
* clutter_actor_should_pick_paint() to decide if to render there
* silhouette but in any case should still recursively call pick for
* any children.
*
* Since 0.4
**/
void
clutter_actor_pick (ClutterActor *self,
const ClutterColor *color)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (color != NULL);
CLUTTER_ACTOR_GET_CLASS (self)->pick(self, color);
}
/**
* clutter_actor_should_pick_paint:
* @self: A #ClutterActor
*
* Utility call for subclasses overiding the pick method.
*
* This function should not never be called directly by applications.
*
* Return value: %TRUE if the actor should paint its silhouette,
* %FALSE otherwise
*/
gboolean
clutter_actor_should_pick_paint (ClutterActor *self)
{
ClutterMainContext *context;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
context = clutter_context_get_default ();
if (CLUTTER_ACTOR_IS_MAPPED (self) &&
(G_UNLIKELY (context->pick_mode == CLUTTER_PICK_ALL) ||
CLUTTER_ACTOR_IS_REACTIVE (self)))
return TRUE;
return FALSE;
}
/*
* Utility functions for manipulating transformation matrix
*
* Matrix: 4x4 of ClutterFixed
*/
#define M(m,row,col) (m)[(col) * 4 + (row)]
/* Transform point (x,y,z) by matrix */
static void
mtx_transform (ClutterFixed m[16],
ClutterFixed *x, ClutterFixed *y, ClutterFixed *z,
ClutterFixed *w)
{
ClutterFixed _x, _y, _z, _w;
_x = *x;
_y = *y;
_z = *z;
_w = *w;
/* We care lot about precission here, so have to use QMUL */
*x = CFX_QMUL (M (m,0,0), _x) + CFX_QMUL (M (m,0,1), _y) +
CFX_QMUL (M (m,0,2), _z) + CFX_QMUL (M (m,0,3), _w);
*y = CFX_QMUL (M (m,1,0), _x) + CFX_QMUL (M (m,1,1), _y) +
CFX_QMUL (M (m,1,2), _z) + CFX_QMUL (M (m,1,3), _w);
*z = CFX_QMUL (M (m,2,0), _x) + CFX_QMUL (M (m,2,1), _y) +
CFX_QMUL (M (m,2,2), _z) + CFX_QMUL (M (m,2,3), _w);
*w = CFX_QMUL (M (m,3,0), _x) + CFX_QMUL (M (m,3,1), _y) +
CFX_QMUL (M (m,3,2), _z) + CFX_QMUL (M (m,3,3), _w);
/* Specially for Matthew: was going to put a comment here, but could not
* think of anything at all to say ;)
*/
}
#undef M
/* Applies the transforms associated with this actor and its ancestors,
* retrieves the resulting OpenGL modelview matrix, and uses the matrix
* to transform the supplied point
*/
static void
clutter_actor_transform_point (ClutterActor *actor,
ClutterUnit *x,
ClutterUnit *y,
ClutterUnit *z,
ClutterUnit *w)
{
ClutterFixed mtx[16];
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = actor->priv;
cogl_push_matrix();
_clutter_actor_apply_modelview_transform_recursive (actor);
cogl_get_modelview_matrix (mtx);
mtx_transform (mtx, x, y, z, w);
cogl_pop_matrix();
}
/* Help macros to scale from OpenGL <-1,1> coordinates system to our
* X-window based <0,window-size> coordinates
*/
#define MTX_GL_SCALE_X(x,w,v1,v2) (CFX_MUL (((CFX_DIV ((x), (w)) + CFX_ONE) >> 1), (v1)) + (v2))
#define MTX_GL_SCALE_Y(y,w,v1,v2) ((v1) - CFX_MUL (((CFX_DIV ((y), (w)) + CFX_ONE) >> 1), (v1)) + (v2))
#define MTX_GL_SCALE_Z(z,w,v1,v2) (MTX_GL_SCALE_X ((z), (w), (v1), (v2)))
/**
* clutter_actor_apply_transform_to_point:
* @self: A #ClutterActor
* @point: A point as #ClutterVertex
* @vertex: The translated #ClutterVertex
*
* Transforms point in coordinates relative to the actor
* into screen coordiances with the current actor tranform
* (i.e. scale, rotation etc)
*
* Since: 0.4
**/
void
clutter_actor_apply_transform_to_point (ClutterActor *self,
ClutterVertex *point,
ClutterVertex *vertex)
{
ClutterFixed mtx_p[16];
ClutterFixed v[4];
ClutterFixed w = CFX_ONE;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
/* First we tranform the point using the OpenGL modelview matrix */
clutter_actor_transform_point (self, &point->x, &point->y, &point->z, &w);
cogl_get_projection_matrix (mtx_p);
cogl_get_viewport (v);
/* Now, transform it again with the projection matrix */
mtx_transform (mtx_p, &point->x, &point->y, &point->z, &w);
/* Finaly translate from OpenGL coords to window coords */
vertex->x = MTX_GL_SCALE_X (point->x, w, v[2], v[0]);
vertex->y = MTX_GL_SCALE_Y (point->y, w, v[3], v[1]);
vertex->z = MTX_GL_SCALE_Z (point->z, w, v[2], v[0]);
}
/* Recursively tranform supplied vertices with the tranform for the current
* actor and all its ancestors (like clutter_actor_transform_point() but
* for all the vertices in one go).
*/
static void
clutter_actor_transform_vertices (ClutterActor * self,
ClutterVertex verts[4],
ClutterFixed w[4])
{
ClutterFixed mtx[16];
ClutterFixed _x, _y, _z, _w;
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
cogl_push_matrix();
_clutter_actor_apply_modelview_transform_recursive (self);
cogl_get_modelview_matrix (mtx);
_x = 0;
_y = 0;
_z = 0;
_w = CFX_ONE;
mtx_transform (mtx, &_x, &_y, &_z, &_w);
verts[0].x = _x;
verts[0].y = _y;
verts[0].z = _z;
w[0] = _w;
_x = priv->coords.x2 - priv->coords.x1;
_y = 0;
_z = 0;
_w = CFX_ONE;
mtx_transform (mtx, &_x, &_y, &_z, &_w);
verts[1].x = _x;
verts[1].y = _y;
verts[1].z = _z;
w[1] = _w;
_x = 0;
_y = priv->coords.y2 - priv->coords.y1;
_z = 0;
_w = CFX_ONE;
mtx_transform (mtx, &_x, &_y, &_z, &_w);
verts[2].x = _x;
verts[2].y = _y;
verts[2].z = _z;
w[2] = _w;
_x = priv->coords.x2 - priv->coords.x1;
_y = priv->coords.y2 - priv->coords.y1;
_z = 0;
_w = CFX_ONE;
mtx_transform (mtx, &_x, &_y, &_z, &_w);
verts[3].x = _x;
verts[3].y = _y;
verts[3].z = _z;
w[3] = _w;
cogl_pop_matrix();
}
/**
* clutter_actor_get_vertices:
* @self: A #ClutterActor
* @verts: Pointer to a location of an array of 4 #ClutterVertex where to
* store the result.
*
* Calculates the tranformed screen coordinates of the four corners of
* the actor; the returned vertices relate to the ClutterActorBox
* coordinates as follows:
*
* v[0] contains (x1, y1)
* v[1] contains (x2, y1)
* v[2] contains (x1, y2)
* v[3] contains (x2, y2)
*
* Since: 0.4
**/
void
clutter_actor_get_vertices (ClutterActor *self,
ClutterVertex verts[4])
{
ClutterFixed mtx_p[16];
ClutterFixed v[4];
ClutterFixed w[4];
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
clutter_actor_transform_vertices (self, verts, w);
cogl_get_projection_matrix (mtx_p);
cogl_get_viewport (v);
mtx_transform (mtx_p,
&verts[0].x,
&verts[0].y,
&verts[0].z,
&w[0]);
verts[0].x = MTX_GL_SCALE_X (verts[0].x, w[0], v[2], v[0]);
verts[0].y = MTX_GL_SCALE_Y (verts[0].y, w[0], v[3], v[1]);
verts[0].z = MTX_GL_SCALE_Z (verts[0].z, w[0], v[2], v[0]);
mtx_transform (mtx_p,
&verts[1].x,
&verts[1].y,
&verts[1].z,
&w[1]);
verts[1].x = MTX_GL_SCALE_X (verts[1].x, w[1], v[2], v[0]);
verts[1].y = MTX_GL_SCALE_Y (verts[1].y, w[1], v[3], v[1]);
verts[1].z = MTX_GL_SCALE_Z (verts[1].z, w[1], v[2], v[0]);
mtx_transform (mtx_p,
&verts[2].x,
&verts[2].y,
&verts[2].z,
&w[2]);
verts[2].x = MTX_GL_SCALE_X (verts[2].x, w[2], v[2], v[0]);
verts[2].y = MTX_GL_SCALE_Y (verts[2].y, w[2], v[3], v[1]);
verts[2].z = MTX_GL_SCALE_Z (verts[2].z, w[2], v[2], v[0]);
mtx_transform (mtx_p,
&verts[3].x,
&verts[3].y,
&verts[3].z,
&w[3]);
verts[3].x = MTX_GL_SCALE_X (verts[3].x, w[3], v[2], v[0]);
verts[3].y = MTX_GL_SCALE_Y (verts[3].y, w[3], v[3], v[1]);
verts[3].z = MTX_GL_SCALE_Z (verts[3].z, w[3], v[2], v[0]);
}
/* Applies the transforms associated with this actor to the
* OpenGL modelview matrix.
*
* This function does not push/pop matrix; it is the responsibility
* of the caller to do so as appropriate
*/
static void
_clutter_actor_apply_modelview_transform (ClutterActor * self)
{
ClutterActorPrivate *priv = self->priv;
ClutterActor *parent;
parent = clutter_actor_get_parent (self);
if (parent != NULL)
{
cogl_translatex (CLUTTER_UNITS_TO_FIXED (priv->coords.x1),
CLUTTER_UNITS_TO_FIXED (priv->coords.y1),
0);
}
/*
* because the rotation involves translations, we must scale before
* applying the rotations (if we apply the scale after the rotations,
* the translations included in the rotation are not scaled and so the
* entire object will move on the screen as a result of rotating it).
*/
if (priv->scale_x != CFX_ONE ||
priv->scale_y != CFX_ONE)
{
cogl_scale (priv->scale_x, priv->scale_y);
}
if (priv->rzang)
{
cogl_translatex (CLUTTER_UNITS_TO_FIXED (priv->rzx),
CLUTTER_UNITS_TO_FIXED (priv->rzy),
0);
cogl_rotatex (priv->rzang, 0, 0, CFX_ONE);
cogl_translatex (CLUTTER_UNITS_TO_FIXED (-priv->rzx),
CLUTTER_UNITS_TO_FIXED (-priv->rzy),
0);
}
if (priv->ryang)
{
cogl_translatex (CLUTTER_UNITS_TO_FIXED (priv->ryx),
0,
CLUTTER_UNITS_TO_FIXED (priv->z + priv->ryz));
cogl_rotatex (priv->ryang, 0, CFX_ONE, 0);
cogl_translatex (CLUTTER_UNITS_TO_FIXED (-priv->ryx),
0,
CLUTTER_UNITS_TO_FIXED (-(priv->z + priv->ryz)));
}
if (priv->rxang)
{
cogl_translatex (0,
CLUTTER_UNITS_TO_FIXED (priv->rxy),
CLUTTER_UNITS_TO_FIXED (priv->z + priv->rxz));
cogl_rotatex (priv->rxang, CFX_ONE, 0, 0);
cogl_translatex (0,
CLUTTER_UNITS_TO_FIXED (-priv->rxy),
CLUTTER_UNITS_TO_FIXED (-(priv->z + priv->rxz)));
}
if (parent && (priv->anchor_x || priv->anchor_y))
{
cogl_translatex (CLUTTER_UNITS_TO_FIXED (-priv->anchor_x),
CLUTTER_UNITS_TO_FIXED (-priv->anchor_y),
0);
}
if (priv->z)
cogl_translatex (0, 0, priv->z);
if (priv->has_clip)
cogl_clip_set (&(priv->clip));
}
/* Recursively applies the transforms associated with this actor and
* its ancestors to the OpenGL modelview matrix.
*
* This function does not push/pop matrix; it is the responsibility
* of the caller to do so as appropriate
*/
static void
_clutter_actor_apply_modelview_transform_recursive (ClutterActor * self)
{
ClutterActor * parent;
parent = clutter_actor_get_parent (self);
if (parent)
_clutter_actor_apply_modelview_transform_recursive (parent);
_clutter_actor_apply_modelview_transform (self);
}
/**
* clutter_actor_paint:
* @self: A #ClutterActor
*
* Renders the actor to display.
*
* This function should not be called directly by applications instead
* #clutter_actor_queue_redraw should be used to queue paints.
**/
void
clutter_actor_paint (ClutterActor *self)
{
ClutterActorPrivate *priv;
ClutterActorClass *klass;
ClutterMainContext *context;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (!CLUTTER_ACTOR_IS_REALIZED (self))
{
CLUTTER_NOTE (PAINT, "Attempting realize via paint()");
clutter_actor_realize(self);
if (!CLUTTER_ACTOR_IS_REALIZED (self))
{
CLUTTER_NOTE (PAINT, "Attempt failed, aborting paint");
return;
}
}
context = clutter_context_get_default ();
klass = CLUTTER_ACTOR_GET_CLASS (self);
cogl_push_matrix();
_clutter_actor_apply_modelview_transform (self);
if (G_UNLIKELY(context->pick_mode != CLUTTER_PICK_NONE))
{
gint r, g, b;
ClutterColor col;
guint32 id;
id = clutter_actor_get_gid (self);
cogl_get_bitmasks (&r, &g, &b, NULL);
/* Encode the actor id into a color, taking into account bpp */
col.red = ((id >> (g+b)) & (0xff>>(8-r)))<<(8-r);
col.green = ((id >> b) & (0xff>>(8-g))) << (8-g);
col.blue = (id & (0xff>>(8-b)))<<(8-b);
col.alpha = 0xff;
/* Actor will then paint silhouette of itself in supplied
* color. See clutter_stage_get_actor_at_pos() for where
* picking is enabled.
*/
clutter_actor_pick (self, &col);
}
else
{
clutter_actor_shader_pre_paint (self, FALSE);
if (G_LIKELY (klass->paint))
klass->paint (self);
clutter_actor_shader_post_paint (self);
}
if (priv->has_clip)
cogl_clip_unset();
cogl_pop_matrix();
}
static void
clutter_actor_real_request_coords (ClutterActor *self,
ClutterActorBox *box)
{
self->priv->coords = *box;
}
/**
* clutter_actor_request_coords:
* @self: A #ClutterActor
* @box: A #ClutterActorBox with the new coordinates, in ClutterUnits
*
* Requests new untransformed coordinates for the bounding box of
* a #ClutterActor. The coordinates must be relative to the current
* parent of the actor.
*
* This function should not be called directly by applications;
* instead, the various position/geometry methods should be used.
*
* Note: Actors overriding the ClutterActor::request_coords() virtual
* function should always chain up to the parent class request_coords()
* method. Actors should override this function only if they need to
* recompute some internal state or need to reposition their evental
* children.
*/
void
clutter_actor_request_coords (ClutterActor *self,
ClutterActorBox *box)
{
ClutterActorPrivate *priv;
gboolean x_change, y_change, width_change, height_change;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (box != NULL);
priv = self->priv;
/* avoid calling request coords if the coordinates did not change */
x_change = (priv->coords.x1 != box->x1);
y_change = (priv->coords.y1 != box->y1);
width_change = ((priv->coords.x2 - priv->coords.x1) != (box->x2 - box->x1));
height_change = ((priv->coords.y2 - priv->coords.y1) != (box->y2 - box->y1));
if (x_change || y_change || width_change || height_change)
{
g_object_ref (self);
g_object_freeze_notify (G_OBJECT (self));
CLUTTER_ACTOR_GET_CLASS (self)->request_coords (self, box);
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (self);
if (x_change)
g_object_notify (G_OBJECT (self), "x");
if (y_change)
g_object_notify (G_OBJECT (self), "y");
if (width_change)
g_object_notify (G_OBJECT (self), "width");
if (height_change)
g_object_notify (G_OBJECT (self), "height");
g_object_thaw_notify (G_OBJECT (self));
g_object_unref (self);
}
}
/**
* clutter_actor_query_coords:
* @self: A #ClutterActor
* @box: A location to store the actors #ClutterActorBox co-ordinates
*
* Requests the untransformed co-ordinates (in ClutterUnits) for the
* #ClutterActor relative to any parent.
*
* This function should not be called directly by applications instead
* the various position/geometry methods should be used.
**/
void
clutter_actor_query_coords (ClutterActor *self,
ClutterActorBox *box)
{
ClutterActorClass *klass;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (box != NULL);
klass = CLUTTER_ACTOR_GET_CLASS (self);
box->x1 = self->priv->coords.x1;
box->y1 = self->priv->coords.y1;
box->x2 = self->priv->coords.x2;
box->y2 = self->priv->coords.y2;
if (klass->query_coords)
{
/* FIXME: This is kind of a cludge - we pass out *private*
* co-ords down to any subclasses so they can modify
* we then resync any changes. Needed for group class.
* Need to figure out nicer way.
*/
klass->query_coords(self, box);
self->priv->coords.x1 = box->x1;
self->priv->coords.y1 = box->y1;
self->priv->coords.x2 = box->x2;
self->priv->coords.y2 = box->y2;
}
}
static void
clutter_actor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterActor *actor;
ClutterActorPrivate *priv;
actor = CLUTTER_ACTOR(object);
priv = actor->priv;
switch (prop_id)
{
case PROP_X:
clutter_actor_set_x (actor, g_value_get_int (value));
break;
case PROP_Y:
clutter_actor_set_y (actor, g_value_get_int (value));
break;
case PROP_WIDTH:
clutter_actor_set_width (actor, g_value_get_int (value));
break;
case PROP_HEIGHT:
clutter_actor_set_height (actor, g_value_get_int (value));
break;
case PROP_DEPTH:
clutter_actor_set_depth (actor, g_value_get_int (value));
break;
case PROP_OPACITY:
clutter_actor_set_opacity (actor, g_value_get_uchar (value));
break;
case PROP_NAME:
clutter_actor_set_name (actor, g_value_get_string (value));
break;
case PROP_VISIBLE:
if (g_value_get_boolean (value) == TRUE)
clutter_actor_show (actor);
else
clutter_actor_hide (actor);
break;
case PROP_SCALE_X:
clutter_actor_set_scalex
(actor,
CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value)),
priv->scale_y);
break;
case PROP_SCALE_Y:
clutter_actor_set_scalex
(actor,
priv->scale_x,
CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value)));
break;
case PROP_CLIP:
{
ClutterGeometry *geom = g_value_get_boxed (value);
clutter_actor_set_clip (actor,
geom->x, geom->y,
geom->width, geom->height);
}
break;
case PROP_REACTIVE:
clutter_actor_set_reactive (actor, g_value_get_boolean (value));
break;
case PROP_ROTATION_ANGLE_X:
clutter_actor_set_rotation (actor,
CLUTTER_X_AXIS,
g_value_get_double (value),
0, priv->rxy, priv->rxz);
break;
case PROP_ROTATION_ANGLE_Y:
clutter_actor_set_rotation (actor,
CLUTTER_Y_AXIS,
g_value_get_double (value),
priv->ryx, 0, priv->ryz);
break;
case PROP_ROTATION_ANGLE_Z:
clutter_actor_set_rotation (actor,
CLUTTER_Z_AXIS,
g_value_get_double (value),
priv->rzx, priv->rzy, 0);
break;
case PROP_ROTATION_CENTER_X:
{
ClutterVertex *center;
center = g_value_get_boxed (value);
clutter_actor_set_rotationx (actor,
CLUTTER_X_AXIS,
priv->rxang,
0,
CLUTTER_UNITS_TO_DEVICE (center->y),
CLUTTER_UNITS_TO_DEVICE (center->z));
}
break;
case PROP_ROTATION_CENTER_Y:
{
ClutterVertex *center;
center = g_value_get_boxed (value);
clutter_actor_set_rotationx (actor,
CLUTTER_X_AXIS,
priv->ryang,
CLUTTER_UNITS_TO_DEVICE (center->x),
0,
CLUTTER_UNITS_TO_DEVICE (center->z));
}
break;
case PROP_ROTATION_CENTER_Z:
{
ClutterVertex *center;
center = g_value_get_boxed (value);
clutter_actor_set_rotationx (actor,
CLUTTER_X_AXIS,
priv->rzang,
CLUTTER_UNITS_TO_DEVICE (center->x),
CLUTTER_UNITS_TO_DEVICE (center->y),
0);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_actor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterActor *actor;
ClutterActorPrivate *priv;
actor = CLUTTER_ACTOR(object);
priv = actor->priv;
switch (prop_id)
{
case PROP_X:
g_value_set_int (value, clutter_actor_get_x (actor));
break;
case PROP_Y:
g_value_set_int (value, clutter_actor_get_y (actor));
break;
case PROP_WIDTH:
g_value_set_int (value, clutter_actor_get_width (actor));
break;
case PROP_HEIGHT:
g_value_set_int (value, clutter_actor_get_height (actor));
break;
case PROP_DEPTH:
g_value_set_int (value, clutter_actor_get_depth (actor));
break;
case PROP_OPACITY:
g_value_set_uchar (value, priv->opacity);
break;
case PROP_NAME:
g_value_set_string (value, priv->name);
break;
case PROP_VISIBLE:
g_value_set_boolean (value,
(CLUTTER_ACTOR_IS_VISIBLE (actor) != FALSE));
break;
case PROP_HAS_CLIP:
g_value_set_boolean (value, priv->has_clip);
break;
case PROP_CLIP:
g_value_set_boxed (value, &(priv->clip));
break;
case PROP_SCALE_X:
g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->scale_x));
break;
case PROP_SCALE_Y:
g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->scale_y));
break;
case PROP_REACTIVE:
g_value_set_boolean (value,
(CLUTTER_ACTOR_IS_REACTIVE (actor) != FALSE));
break;
case PROP_ROTATION_ANGLE_X:
g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->rxang));
break;
case PROP_ROTATION_ANGLE_Y:
g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->ryang));
break;
case PROP_ROTATION_ANGLE_Z:
g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->rzang));
break;
case PROP_ROTATION_CENTER_X:
{
ClutterVertex center = { 0, };
center.y = priv->rxy;
center.z = priv->rxz;
g_value_set_boxed (value, &center);
}
break;
case PROP_ROTATION_CENTER_Y:
{
ClutterVertex center = { 0, };
center.x = priv->ryx;
center.z = priv->ryz;
g_value_set_boxed (value, &center);
}
break;
case PROP_ROTATION_CENTER_Z:
{
ClutterVertex center = { 0, };
center.x = priv->rzx;
center.y = priv->rzy;
g_value_set_boxed (value, &center);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_actor_dispose (GObject *object)
{
ClutterActor *self = CLUTTER_ACTOR (object);
CLUTTER_NOTE (MISC, "Disposing of object (id=%d) of type `%s' (ref_count:%d)",
self->priv->id,
g_type_name (G_OBJECT_TYPE (self)),
object->ref_count);
destroy_shader_data (self);
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION))
{
CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_DESTRUCTION);
g_signal_emit (self, actor_signals[DESTROY], 0);
CLUTTER_UNSET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_DESTRUCTION);
}
G_OBJECT_CLASS (clutter_actor_parent_class)->dispose (object);
}
static void
clutter_actor_finalize (GObject *object)
{
ClutterActor *actor = CLUTTER_ACTOR (object);
CLUTTER_NOTE (MISC, "Finalize object (id=%d) of type `%s'",
actor->priv->id,
g_type_name (G_OBJECT_TYPE (actor)));
g_free (actor->priv->name);
G_OBJECT_CLASS (clutter_actor_parent_class)->finalize (object);
}
static void
clutter_actor_class_init (ClutterActorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->set_property = clutter_actor_set_property;
object_class->get_property = clutter_actor_get_property;
object_class->dispose = clutter_actor_dispose;
object_class->finalize = clutter_actor_finalize;
g_type_class_add_private (klass, sizeof (ClutterActorPrivate));
/**
* ClutterActor:x:
*
* X coordinate of the actor.
*/
g_object_class_install_property (object_class,
PROP_X,
g_param_spec_int ("x",
"X co-ord",
"X co-ord of actor",
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:y:
*
* Y coordinate of the actor.
*/
g_object_class_install_property (object_class,
PROP_Y,
g_param_spec_int ("y",
"Y co-ord",
"Y co-ord of actor",
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:width:
*
* Width of the actor (in pixels).
*/
g_object_class_install_property (object_class,
PROP_WIDTH,
g_param_spec_int ("width",
"Width",
"Width of actor in pixels",
0, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:height:
*
* Height of the actor (in pixels).
*/
g_object_class_install_property (object_class,
PROP_HEIGHT,
g_param_spec_int ("height",
"Height",
"Height of actor in pixels",
0, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:depth:
*
* Depth of the actor.
*
* Since: 0.6
*/
g_object_class_install_property (object_class,
PROP_DEPTH,
g_param_spec_int ("depth",
"Depth",
"Depth of actor",
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:opacity:
*
* Opacity of the actor.
*/
g_object_class_install_property (object_class,
PROP_OPACITY,
g_param_spec_uchar ("opacity",
"Opacity",
"Opacity of actor",
0, 0xff,
0xff,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:visible:
*
* Whether the actor is visible or not.
*/
g_object_class_install_property (object_class,
PROP_VISIBLE,
g_param_spec_boolean ("visible",
"Visible",
"Whether the actor is visible or not",
FALSE,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:reactive:
*
* Whether the actor is reactive to events or not.
*
* Since: 0.6
*/
g_object_class_install_property (object_class,
PROP_REACTIVE,
g_param_spec_boolean ("reactive",
"Reactive",
"Whether the actor is reactive to events or not",
FALSE,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:has-clip:
*
* Whether the actor has the clip property set or not.
*/
g_object_class_install_property (object_class,
PROP_HAS_CLIP,
g_param_spec_boolean ("has-clip",
"Has Clip",
"Whether the actor has a clip set or not",
FALSE,
CLUTTER_PARAM_READABLE));
/**
* ClutterActor:clip:
*
* The clip region for the actor.
*/
g_object_class_install_property (object_class,
PROP_CLIP,
g_param_spec_boxed ("clip",
"Clip",
"The clip region for the actor",
CLUTTER_TYPE_GEOMETRY,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:name:
*
* The name of the actor.
*
* Since: 0.2
*/
g_object_class_install_property (object_class,
PROP_NAME,
g_param_spec_string ("name",
"Name",
"Name of the actor",
NULL,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor::scale-x:
*
* The horizontal scale of the actor
*
* Since: 0.6
*/
g_object_class_install_property
(object_class,
PROP_SCALE_X,
g_param_spec_double ("scale-x",
"Scale-X",
"Scale X",
0.0,
G_MAXDOUBLE,
1.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor::scale-y:
*
* The vertical scale of the actor
*
* Since: 0.6
*/
g_object_class_install_property
(object_class,
PROP_SCALE_Y,
g_param_spec_double ("scale-y",
"Scale-Y",
"Scale Y",
0.0,
G_MAXDOUBLE,
1.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor::rotation-angle-x:
*
* The rotation angle on the X axis.
*
* Since: 0.6
*/
g_object_class_install_property
(object_class,
PROP_ROTATION_ANGLE_X,
g_param_spec_double ("rotation-angle-x",
"Rotation Angle X",
"The rotation angle on the X axis",
0.0,
G_MAXDOUBLE,
0.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor::rotation-angle-y:
*
* The rotation angle on the Y axis.
*
* Since: 0.6
*/
g_object_class_install_property
(object_class,
PROP_ROTATION_ANGLE_Y,
g_param_spec_double ("rotation-angle-y",
"Rotation Angle Y",
"The rotation angle on the Y axis",
0.0,
G_MAXDOUBLE,
0.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor::rotation-angle-z:
*
* The rotation angle on the Z axis.
*
* Since: 0.6
*/
g_object_class_install_property
(object_class,
PROP_ROTATION_ANGLE_Z,
g_param_spec_double ("rotation-angle-z",
"Rotation Angle Z",
"The rotation angle on the Z axis",
0.0,
G_MAXDOUBLE,
0.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor::rotation-center-x:
*
* The rotation center on the X axis.
*
* Since: 0.6
*/
g_object_class_install_property
(object_class,
PROP_ROTATION_CENTER_X,
g_param_spec_boxed ("rotation-center-x",
"Rotation Center X",
"The rotation center on the X axis",
CLUTTER_TYPE_VERTEX,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor::rotation-center-y:
*
* The rotation center on the Y axis.
*
* Since: 0.6
*/
g_object_class_install_property
(object_class,
PROP_ROTATION_CENTER_Y,
g_param_spec_boxed ("rotation-center-y",
"Rotation Center Y",
"The rotation center on the Y axis",
CLUTTER_TYPE_VERTEX,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor::rotation-center-z:
*
* The rotation center on the Z axis.
*
* Since: 0.6
*/
g_object_class_install_property
(object_class,
PROP_ROTATION_CENTER_Z,
g_param_spec_boxed ("rotation-center-z",
"Rotation Center Z",
"The rotation center on the Z axis",
CLUTTER_TYPE_VERTEX,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor::destroy:
* @actor: the object which received the signal
*
* The ::destroy signal is emitted when an actor is destroyed,
* either by direct invocation of clutter_actor_destroy() or
* when the #ClutterGroup that contains the actor is destroyed.
*
* Since: 0.2
*/
actor_signals[DESTROY] =
g_signal_new ("destroy",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_CLEANUP | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS,
G_STRUCT_OFFSET (ClutterActorClass, destroy),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::show:
* @actor: the object which received the signal
*
* The ::show signal is emitted when an actor becomes visible.
*
* Since: 0.2
*/
actor_signals[SHOW] =
g_signal_new ("show",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (ClutterActorClass, show),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::hide:
* @actor: the object which received the signal
*
* The ::hide signal is emitted when an actor is no longer visible.
*
* Since: 0.2
*/
actor_signals[HIDE] =
g_signal_new ("hide",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (ClutterActorClass, hide),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::parent-set:
* @actor: the object which received the signal
* @old_parent: the previous parent of the actor, or %NULL
*
* This signal is emitted when the parent of the actor changes.
*
* Since: 0.2
*/
actor_signals[PARENT_SET] =
g_signal_new ("parent-set",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, parent_set),
NULL, NULL,
clutter_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
CLUTTER_TYPE_ACTOR);
/**
* ClutterActor::event:
* @actor: the actor which received the event
* @event: a #ClutterEvent
*
* The ::event signal is emitted each time and event is received
* by the @actor. This signal will be emitted on every actor,
* following the hierarchy chain, until it reaches the top-level
* container (the #ClutterStage).
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[EVENT] =
g_signal_new ("event",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::button-press-event:
* @actor: the actor which received the event
* @event: a #ClutterButtonEvent
*
* The ::button-press-event signal is emitted each time a mouse button
* is pressed on @actor.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[BUTTON_PRESS_EVENT] =
g_signal_new ("button-press-event",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, button_press_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::button-release-event:
* @actor: the actor which received the event
* @event: a #ClutterButtonEvent
*
* The ::button-release-event signal is emitted each time a mouse button
* is released on @actor.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[BUTTON_RELEASE_EVENT] =
g_signal_new ("button-release-event",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, button_release_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::scroll-event:
* @actor: the actor which received the event
* @event: a #ClutterScrollEvent
*
* The ::scroll-event signal is emitted each time a the mouse is
* scrolled on @actor
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[SCROLL_EVENT] =
g_signal_new ("scroll-event",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, scroll_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::key-press-event:
* @actor: the actor which received the event
* @event: a #ClutterKeyEvent
*
* The ::key-press-event signal is emitted each time a keyboard button
* is pressed on @actor.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[KEY_PRESS_EVENT] =
g_signal_new ("key-press-event",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, key_press_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::key-release-event:
* @actor: the actor which received the event
* @event: a #ClutterKeyEvent
*
* The ::key-release-event signal is emitted each time a keyboard button
* is released on @actor.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[KEY_RELEASE_EVENT] =
g_signal_new ("key-release-event",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, key_release_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::motion-event:
* @actor: the actor which received the event
* @event: a #ClutterMotionEvent
*
* The ::motion-event signal is emitted each time the mouse pointer is
* moved on @actor.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[MOTION_EVENT] =
g_signal_new ("motion-event",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, motion_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::focus-in:
* @actor: the actor which now has key focus
*
* The ::focus-in signal is emitted when @actor recieves key focus.
*
* Since: 0.6
*/
actor_signals[FOCUS_IN] =
g_signal_new ("focus-in",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, focus_in),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::focus-out:
* @actor: the actor which now has key focus
*
* The ::focus-out signal is emitted when @actor loses key focus.
*
* Since: 0.6
*/
actor_signals[FOCUS_OUT] =
g_signal_new ("focus-out",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, focus_out),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::enter-event:
* @actor: the actor which the pointer has entered.
* @event: a #ClutterCrossingEvent
*
* The ::enter-event signal is emitted when the pointer enters the @actor
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[ENTER_EVENT] =
g_signal_new ("enter-event",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, enter_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::leave-event:
* @actor: the actor which the pointer has left
* @event: a #ClutterCrossingEvent
*
* The ::leave-event signal is emitted when the pointer leaves the @actor.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[LEAVE_EVENT] =
g_signal_new ("leave-event",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, leave_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::captured-event:
* @actor: the actor which received the signal
* @event: a #ClutterEvent
*
* The ::captured-event signal is emitted when an event is captured
* by Clutter. This signal will be emitted starting from the top-level
* container (the #ClutterStage) to the actor which received the event
* going down the hierarchy. This signal can be used to intercept every
* event before the specialized events (like
* ClutterActor::button-press-event or ::key-released-event) are
* emitted.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[CAPTURED_EVENT] =
g_signal_new ("captured-event",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, captured_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
klass->show = clutter_actor_real_show;
klass->show_all = clutter_actor_show;
klass->hide = clutter_actor_real_hide;
klass->hide_all = clutter_actor_hide;
klass->pick = clutter_actor_real_pick;
klass->request_coords = clutter_actor_real_request_coords;
}
static void
clutter_actor_init (ClutterActor *self)
{
ClutterActorPrivate *priv;
ClutterActorBox box = { 0, };
self->priv = priv = CLUTTER_ACTOR_GET_PRIVATE (self);
priv->parent_actor = NULL;
priv->has_clip = FALSE;
priv->opacity = 0xff;
priv->id = __id++;
priv->scale_x = CFX_ONE;
priv->scale_y = CFX_ONE;
priv->shader_data = NULL;
clutter_actor_request_coords (self, &box);
}
/**
* clutter_actor_destroy:
* @self: a #ClutterActor
*
* Destroys an actor. When an actor is destroyed, it will break any
* references it holds to other objects. If the actor is inside a
* container, the actor will be removed.
*
* When you destroy a container its children will be destroyed as well.
*
* Note: you cannot destroy the #ClutterStage returned by
* clutter_stage_get_default().
*/
void
clutter_actor_destroy (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
g_warning ("Calling clutter_actor_destroy() on an actor of type `%s' "
"is not possible. This is usually an application bug.",
g_type_name (G_OBJECT_TYPE (self)));
return;
}
priv = self->priv;
if (priv->parent_actor)
{
ClutterActor *parent = priv->parent_actor;
if (CLUTTER_IS_CONTAINER (parent))
{
g_object_ref (self);
clutter_container_remove_actor (CLUTTER_CONTAINER (parent), self);
}
else
priv->parent_actor = NULL;
}
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION))
g_object_run_dispose (G_OBJECT (self));
g_object_unref (self);
}
/**
* clutter_actor_queue_redraw:
* @self: A #ClutterActor
*
* Queues up a redraw of an actor and any children. The redraw occurs
* once the main loop becomes idle (after the current batch of events
* has been processed, roughly).
*
* Applications rarely need to call this as redraws are handled automatically
* by modification functions.
*/
void
clutter_actor_queue_redraw (ClutterActor *self)
{
ClutterMainContext *ctx = CLUTTER_CONTEXT();
if (!ctx->update_idle)
{
CLUTTER_TIMESTAMP (SCHEDULER, "Adding idle source for actor: %p", self);
ctx->update_idle =
clutter_threads_add_idle_full (G_PRIORITY_DEFAULT + 10,
redraw_update_idle,
NULL, NULL);
}
}
/**
* clutter_actor_set_geometry:
* @self: A #ClutterActor
* @geometry: A #ClutterGeometry
*
* Sets the actors untransformed geometry in pixels relative to any
* parent actor.
*/
void
clutter_actor_set_geometry (ClutterActor *self,
const ClutterGeometry *geometry)
{
ClutterActorBox box;
box.x1 = CLUTTER_UNITS_FROM_INT (geometry->x);
box.y1 = CLUTTER_UNITS_FROM_INT (geometry->y);
box.x2 = CLUTTER_UNITS_FROM_INT (geometry->x + geometry->width);
box.y2 = CLUTTER_UNITS_FROM_INT (geometry->y + geometry->height);
clutter_actor_request_coords (self, &box);
}
/**
* clutter_actor_get_geometry:
* @self: A #ClutterActor
* @geometry: A location to store actors #ClutterGeometry
*
* Gets the actors untransformed geometry in pixels relative to any
* parent actor.
*/
void
clutter_actor_get_geometry (ClutterActor *self,
ClutterGeometry *geometry)
{
ClutterActorBox box;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_query_coords (self, &box);
geometry->x = CLUTTER_UNITS_TO_DEVICE (box.x1);
geometry->y = CLUTTER_UNITS_TO_DEVICE (box.y1);
geometry->width = CLUTTER_UNITS_TO_DEVICE (box.x2 - box.x1);
geometry->height = CLUTTER_UNITS_TO_DEVICE (box.y2 - box.y1);
}
/**
* clutter_actor_get_coords:
* @self: A #ClutterActor
* @x_1: A location to store actors left position, or %NULL.
* @y_1: A location to store actors top position, or %NULL.
* @x_2: A location to store actors right position, or %NULL.
* @y_2: A location to store actors bottom position, or %NULL.
*
* Gets the actors untransformed bounding rectangle co-ordinates in pixels
* relative to any parent actor.
*/
void
clutter_actor_get_coords (ClutterActor *self,
gint *x_1,
gint *y_1,
gint *x_2,
gint *y_2)
{
ClutterActorBox box;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_query_coords (self, &box);
if (x_1)
*x_1 = CLUTTER_UNITS_TO_DEVICE (box.x1);
if (y_1)
*y_1 = CLUTTER_UNITS_TO_DEVICE (box.y1);
if (x_2)
*x_2 = CLUTTER_UNITS_TO_DEVICE (box.x2);
if (y_2)
*y_2 = CLUTTER_UNITS_TO_DEVICE (box.y2);
}
/**
* clutter_actor_set_position
* @self: A #ClutterActor
* @x: New left position of actor in pixels.
* @y: New top position of actor in pixels.
*
* Sets the actors position in pixels relative to any
* parent actor.
*/
void
clutter_actor_set_position (ClutterActor *self,
gint x,
gint y)
{
ClutterActorBox box;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_query_coords (self, &box);
box.x2 += (CLUTTER_UNITS_FROM_INT (x) - box.x1);
box.y2 += (CLUTTER_UNITS_FROM_INT (y) - box.y1);
box.x1 = CLUTTER_UNITS_FROM_INT (x);
box.y1 = CLUTTER_UNITS_FROM_INT (y);
clutter_actor_request_coords (self, &box);
}
/**
* clutter_actor_set_positionu
* @self: A #ClutterActor
* @x: New left position of actor in #ClutterUnit
* @y: New top position of actor in #ClutterUnit
*
* Sets the actors position in #ClutterUnit relative to any
* parent actor.
*
* Since: 0.6
*/
void
clutter_actor_set_positionu (ClutterActor *self,
ClutterUnit x,
ClutterUnit y)
{
ClutterActorBox box;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_query_coords (self, &box);
box.x2 += (x - box.x1);
box.y2 += (y - box.y1);
box.x1 = x;
box.y1 = y;
clutter_actor_request_coords (self, &box);
}
/**
* clutter_actor_move_by
* @self: A #ClutterActor
* @dx: Distance to move Actor on X axis.
* @dy: Distance to move Actor on Y axis.
*
* Moves an actor by specified distance relative to
* current position in pixels.
*
* Since: 0.2
*/
void
clutter_actor_move_by (ClutterActor *self,
gint dx,
gint dy)
{
ClutterActorBox box;
gint32 dxu = CLUTTER_UNITS_FROM_INT (dx);
gint32 dyu = CLUTTER_UNITS_FROM_INT (dy);
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_query_coords (self, &box);
box.x2 += dxu;
box.y2 += dyu;
box.x1 += dxu;
box.y1 += dyu;
clutter_actor_request_coords (self, &box);
}
/* local inline version, without type checking to be used by
* set_width() and set_height(). if one of the dimensions is < 0
* it will not be changed
*/
static inline void
clutter_actor_set_size_internal (ClutterActor *self,
gint width,
gint height)
{
ClutterActorBox box;
clutter_actor_query_coords (self, &box);
if (width > 0)
box.x2 = box.x1 + CLUTTER_UNITS_FROM_INT (width);
if (height > 0)
box.y2 = box.y1 + CLUTTER_UNITS_FROM_INT (height);
clutter_actor_request_coords (self, &box);
}
/* local inline unit version, without type checking to be used by
* set_width() and set_height(). if one of the dimensions is < 0
* it will not be changed
*/
static inline void
clutter_actor_set_size_internalu (ClutterActor *self,
ClutterUnit width,
ClutterUnit height)
{
ClutterActorBox box;
clutter_actor_query_coords (self, &box);
if (width > 0)
box.x2 = box.x1 + width;
if (height > 0)
box.y2 = box.y1 + height;
clutter_actor_request_coords (self, &box);
}
/**
* clutter_actor_set_size
* @self: A #ClutterActor
* @width: New width of actor in pixels, or -1
* @height: New height of actor in pixels, or -1
*
* Sets the actors size in pixels. If @width and/or @height are -1 the
* actor will assume the same size of its bounding box.
*/
void
clutter_actor_set_size (ClutterActor *self,
gint width,
gint height)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_size_internal (self, width, height);
}
/**
* clutter_actor_set_sizeu
* @self: A #ClutterActor
* @width: New width of actor in #ClutterUnit, or -1
* @height: New height of actor in #ClutterUnit, or -1
*
* Sets the actors size in #ClutterUnit. If @width and/or @height are -1 the
* actor will assume the same size of its bounding box.
*
* Since: 0.6
*/
void
clutter_actor_set_sizeu (ClutterActor *self,
ClutterUnit width,
ClutterUnit height)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_size_internalu (self, width, height);
}
/**
* clutter_actor_get_size:
* @self: A #ClutterActor
* @width: Location to store width if non NULL.
* @height: Location to store height if non NULL.
*
* Gets the size of an actor in pixels ignoring any scaling factors.
*
* Since: 0.2
*/
void
clutter_actor_get_size (ClutterActor *self,
guint *width,
guint *height)
{
ClutterActorBox box;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_query_coords (self, &box);
if (width)
*width = CLUTTER_UNITS_TO_DEVICE (box.x2 - box.x1);
if (height)
*height = CLUTTER_UNITS_TO_DEVICE (box.y2 - box.y1);
}
/**
* clutter_actor_get_sizeu:
* @self: A #ClutterActor
* @width: Location to store width if non NULL.
* @height: Location to store height if non NULL.
*
* Gets the size of an actor in #ClutterUnit<!-- -->s ignoring any scaling
* factors.
*
* Since: 0.6
*/
void
clutter_actor_get_sizeu (ClutterActor *self,
ClutterUnit *width,
ClutterUnit *height)
{
ClutterActorBox box;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_query_coords (self, &box);
if (width)
*width = box.x2 - box.x1;
if (height)
*height = box.y2 - box.y1;
}
/**
* clutter_actor_get_position:
* @self: a #ClutterActor
* @x: return location for the X coordinate, or %NULL
* @y: return location for the Y coordinate, or %NULL
*
* Retrieves the position of an actor.
*
* Since: 0.6
*/
void
clutter_actor_get_position (ClutterActor *self,
gint *x,
gint *y)
{
ClutterActorBox box = { 0, };
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_query_coords (self, &box);
if (x)
*x = CLUTTER_UNITS_TO_DEVICE (box.x1);
if (y)
*y = CLUTTER_UNITS_TO_DEVICE (box.y1);
}
/**
* clutter_actor_get_positionu:
* @self: a #ClutterActor
* @x: return location for the X coordinate, or %NULL
* @y: return location for the Y coordinate, or %NULL
*
* Retrieves the position of an actor in #ClutterUnit<!-- -->s.
*
* Since: 0.6
*/
void
clutter_actor_get_positionu (ClutterActor *self,
ClutterUnit *x,
ClutterUnit *y)
{
ClutterActorBox box = { 0, };
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_query_coords (self, &box);
if (x)
*x = box.x1;
if (y)
*y = box.y1;
}
/*
* clutter_actor_get_abs_position_units
* @self: A #ClutterActor
* @x: Location to store x position if non NULL.
* @y: Location to store y position if non NULL.
*
* Gets the absolute position of an actor in clutter units relative
* to the stage.
*
* Since: 0.4
*/
static void
clutter_actor_get_abs_position_units (ClutterActor *self,
gint32 *x,
gint32 *y)
{
ClutterVertex v1;
ClutterVertex v2;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
v1.x = v1.y = v1.z = 0;
clutter_actor_apply_transform_to_point (self, &v1, &v2);
if (x)
*x = v2.x;
if (y)
*y = v2.y;
}
/**
* clutter_actor_get_abs_position
* @self: A #ClutterActor
* @x: Location to store x position if non NULL.
* @y: Location to store y position if non NULL.
*
* Gets the absolute position of an actor in pixels relative
* to the stage.
*/
void
clutter_actor_get_abs_position (ClutterActor *self,
gint *x,
gint *y)
{
ClutterUnit xu, yu;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
xu = yu = 0;
clutter_actor_get_abs_position_units (self, &xu, &yu);
if (x)
*x = CLUTTER_UNITS_TO_DEVICE (xu);
if (y)
*y = CLUTTER_UNITS_TO_DEVICE (yu);
}
/*
* clutter_actor_get_abs_size_units:
* @self: A #ClutterActor
* @width: Location to store width if non NULL.
* @height: Location to store height if non NULL.
*
* Gets the absolute size of an actor in clutter units taking into account
* an scaling factors.
*
* Note: When the actor (or one of its ancestors) is rotated around the x or y
* axis, it no longer appears as on the stage as a rectangle, but as a generic
* quadrangle; in that case this function returns the size of the smallest
* rectangle that encapsulates the entire quad. Please note that in this case
* no assumptions can be made about the relative position of this envelope to
* the absolute position of the actor, as returned by
* clutter_actor_get_abs_position() - if you need this information, you need
* to use clutter_actor_get_vertices() to get the coords of the actual
* quadrangle.
*
* Since: 0.4
*/
static void
clutter_actor_get_abs_size_units (ClutterActor *self,
gint32 *width,
gint32 *height)
{
ClutterVertex v[4];
ClutterFixed x_min, x_max, y_min, y_max;
gint i;
clutter_actor_get_vertices (self, v);
x_min = x_max = v[0].x;
y_min = y_max = v[0].y;
for (i = 1; i < sizeof(v)/sizeof(v[0]); ++i)
{
if (v[i].x < x_min)
x_min = v[i].x;
if (v[i].x > x_max)
x_max = v[i].x;
if (v[i].y < y_min)
y_min = v[i].y;
if (v[i].y > y_max)
y_max = v[i].y;
}
*width = x_max - x_min;
*height = y_max - y_min;
}
/**
* clutter_actor_get_abs_size:
* @self: A #ClutterActor
* @width: Location to store width if non NULL.
* @height: Location to store height if non NULL.
*
* Gets the absolute size of an actor taking into account
* an scaling factors
*/
void
clutter_actor_get_abs_size (ClutterActor *self,
guint *width,
guint *height)
{
gint32 wu, hu;
clutter_actor_get_abs_size_units (self, &wu, &hu);
*width = CLUTTER_UNITS_TO_DEVICE (wu);
*height = CLUTTER_UNITS_TO_DEVICE (hu);
}
/**
* clutter_actor_get_width
* @self: A #ClutterActor
*
* Retrieves the actors width ignoring any scaling factors.
*
* Return value: The actor width in pixels
**/
guint
clutter_actor_get_width (ClutterActor *self)
{
ClutterActorBox box;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
clutter_actor_query_coords (self, &box);
return CLUTTER_UNITS_TO_DEVICE (box.x2 - box.x1);
}
/**
* clutter_actor_get_widthu
* @self: A #ClutterActor
*
* Retrieves the actors width ignoring any scaling factors.
*
* Return value: The actor width in #ClutterUnit
*
* since: 0.6
**/
ClutterUnit
clutter_actor_get_widthu (ClutterActor *self)
{
ClutterActorBox box;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
clutter_actor_query_coords (self, &box);
return box.x2 - box.x1;
}
/**
* clutter_actor_get_height
* @self: A #ClutterActor
*
* Retrieves the actors height ignoring any scaling factors.
*
* Return value: The actor height in pixels
**/
guint
clutter_actor_get_height (ClutterActor *self)
{
ClutterActorBox box;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
clutter_actor_query_coords (self, &box);
return CLUTTER_UNITS_TO_DEVICE (box.y2 - box.y1);
}
/**
* clutter_actor_get_heightu
* @self: A #ClutterActor
*
* Retrieves the actors height ignoring any scaling factors.
*
* Return value: The actor height in #ClutterUnit
*
* since: 0.6
**/
ClutterUnit
clutter_actor_get_heightu (ClutterActor *self)
{
ClutterActorBox box;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
clutter_actor_query_coords (self, &box);
return box.y2 - box.y1;
}
/**
* clutter_actor_set_width
* @self: A #ClutterActor
* @width: Requested new width for actor
*
* Requests a new width for actor
*
* since: 0.2
**/
void
clutter_actor_set_width (ClutterActor *self,
guint width)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_size_internal (self, width, -1);
}
/**
* clutter_actor_set_widthu
* @self: A #ClutterActor
* @width: Requested new width for actor in #ClutterUnit
*
* Requests a new width for actor
*
* since: 0.6
**/
void
clutter_actor_set_widthu (ClutterActor *self,
ClutterUnit width)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_size_internalu (self, width, -1);
}
/**
* clutter_actor_set_height
* @self: A #ClutterActor
* @height: Requested new height for actor
*
* Requests a new height for actor
*
* since: 0.2
**/
void
clutter_actor_set_height (ClutterActor *self,
guint height)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_size_internal (self, -1, height);
}
/**
* clutter_actor_set_heightu
* @self: A #ClutterActor
* @height: Requested new height for actor in #ClutterUnit
*
* Requests a new height for actor
*
* since: 0.6
**/
void
clutter_actor_set_heightu (ClutterActor *self,
ClutterUnit height)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_size_internalu (self, -1, height);
}
/**
* clutter_actor_set_x:
* @self: a #ClutterActor
* @x: the actors position on the X axis
*
* Sets the actor's x position relative to its parent.
*
* Since: 0.6
*/
void
clutter_actor_set_x (ClutterActor *self,
gint x)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_position (self,
x,
clutter_actor_get_y (self));
}
/**
* clutter_actor_set_xu:
* @self: a #ClutterActor
* @x: the actors position on the X axis in #ClutterUnit
*
* Sets the actor's x position relative to its parent.
*
* Since: 0.6
*/
void
clutter_actor_set_xu (ClutterActor *self,
ClutterUnit x)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_positionu (self,
x,
clutter_actor_get_yu (self));
}
/**
* clutter_actor_set_y:
* @self: a #ClutterActor
* @y: the actors position on the Y axis
*
* Sets the actor's y position relative to its parent.
*
* Since: 0.6
*/
void
clutter_actor_set_y (ClutterActor *self,
gint y)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_position (self,
clutter_actor_get_x (self),
y);
}
/**
* clutter_actor_set_yu:
* @self: a #ClutterActor
* @y: the actors position on the Y axis in #ClutterUnit
*
* Sets the actor's y position relative to its parent.
*
* Since: 0.6
*/
void
clutter_actor_set_yu (ClutterActor *self,
ClutterUnit y)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_positionu (self,
clutter_actor_get_xu (self),
y);
}
/**
* clutter_actor_get_x
* @self: A #ClutterActor
*
* Retrieves the actors x position relative to any parent.
*
* Return value: The actor x position in pixels ignoring any tranforms
* (i.e scaling, rotation).
**/
gint
clutter_actor_get_x (ClutterActor *self)
{
ClutterActorBox box;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
clutter_actor_query_coords (self, &box);
return CLUTTER_UNITS_TO_DEVICE (box.x1);
}
/**
* clutter_actor_get_xu
* @self: A #ClutterActor
*
* Retrieves the actors x position relative to any parent, in #ClutterUnit
*
* Return value: The actor x position in #ClutterUnit ignoring any tranforms
* (i.e scaling, rotation).
*
* Since: 0.6
**/
ClutterUnit
clutter_actor_get_xu (ClutterActor *self)
{
ClutterActorBox box;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
clutter_actor_query_coords (self, &box);
return box.x1;
}
/**
* clutter_actor_get_y:
* @self: A #ClutterActor
*
* Retrieves the actors y position relative to any parent.
*
* Return value: The actor y position in pixels ignoring any tranforms
* (i.e scaling, rotation).
**/
gint
clutter_actor_get_y (ClutterActor *self)
{
ClutterActorBox box;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
clutter_actor_query_coords (self, &box);
return CLUTTER_UNITS_TO_DEVICE (box.y1);
}
/**
* clutter_actor_get_yu:
* @self: A #ClutterActor
*
* Retrieves the actors y position relative to any parent, in #ClutterUnit
*
* Return value: The actor y position in #ClutterUnit ignoring any tranforms
* (i.e scaling, rotation).
**/
ClutterUnit
clutter_actor_get_yu (ClutterActor *self)
{
ClutterActorBox box;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
clutter_actor_query_coords (self, &box);
return box.y1;
}
/**
* clutter_actor_set_scalex:
* @self: A #ClutterActor
* @scale_x: #ClutterFixed factor to scale actor by horizontally.
* @scale_y: #ClutterFixed factor to scale actor by vertically.
*
* Scales an actor with fixed point parameters.
*/
void
clutter_actor_set_scalex (ClutterActor *self,
ClutterFixed scale_x,
ClutterFixed scale_y)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_object_ref (self);
g_object_freeze_notify (G_OBJECT (self));
self->priv->scale_x = scale_x;
g_object_notify (G_OBJECT (self), "scale-x");
self->priv->scale_y = scale_y;
g_object_notify (G_OBJECT (self), "scale-y");
g_object_thaw_notify (G_OBJECT (self));
g_object_unref (self);
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (self);
}
/**
* clutter_actor_set_scale:
* @self: A #ClutterActor
* @scale_x: double factor to scale actor by horizontally.
* @scale_y: double factor to scale actor by vertically.
*
* Scales an actor with floating point parameters.
*
* Since: 0.2
*/
void
clutter_actor_set_scale (ClutterActor *self,
double scale_x,
double scale_y)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_scalex (self,
CLUTTER_FLOAT_TO_FIXED (scale_x),
CLUTTER_FLOAT_TO_FIXED (scale_y));
}
/**
* clutter_actor_get_scalex:
* @self: A #ClutterActor
* @scale_x: Location to store horizonal fixed scale factor if non NULL.
* @scale_y: Location to store vertical fixed scale factor if non NULL.
*
* Retrieves an actors scale in fixed point.
*
* Since: 0.2
*/
void
clutter_actor_get_scalex (ClutterActor *self,
ClutterFixed *scale_x,
ClutterFixed *scale_y)
{
if (scale_x)
*scale_x = self->priv->scale_x;
if (scale_y)
*scale_y = self->priv->scale_y;
}
/**
* clutter_actor_get_scale:
* @self: A #ClutterActor
* @scale_x: Location to store horizonal float scale factor if non NULL.
* @scale_y: Location to store vertical float scale factor if non NULL.
*
* Retrieves an actors scale in floating point.
*
* Since: 0.2
*/
void
clutter_actor_get_scale (ClutterActor *self,
gdouble *scale_x,
gdouble *scale_y)
{
if (scale_x)
*scale_x = CLUTTER_FIXED_TO_FLOAT (self->priv->scale_x);
if (scale_y)
*scale_y = CLUTTER_FIXED_TO_FLOAT (self->priv->scale_y);
}
/**
* clutter_actor_set_opacity:
* @self: A #ClutterActor
* @opacity: New opacity value for actor.
*
* Sets the actors opacity, with zero being completely transparent and
* 255 (0xff) as fully opaque.
*/
void
clutter_actor_set_opacity (ClutterActor *self,
guint8 opacity)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
self->priv->opacity = opacity;
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (self);
}
/**
* clutter_actor_get_opacity:
* @self: A #ClutterActor
*
* Retrieves the actors opacity.
*
* Return value: The actor opacity value.
*/
guint8
clutter_actor_get_opacity (ClutterActor *self)
{
ClutterActor *parent;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
parent = self->priv->parent_actor;
/* Factor in the actual actors opacity with parents */
if (parent && clutter_actor_get_opacity (parent) != 0xff)
return (clutter_actor_get_opacity(parent) * self->priv->opacity) / 0xff;
return self->priv->opacity;
}
/**
* clutter_actor_set_name:
* @self: A #ClutterActor
* @name: Textual tag to apply to actor
*
* Sets a textual tag to the actor.
*/
void
clutter_actor_set_name (ClutterActor *self,
const gchar *name)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_object_ref (self);
g_free (self->priv->name);
if (name && name[0] != '\0')
self->priv->name = g_strdup(name);
g_object_notify (G_OBJECT (self), "name");
g_object_unref (self);
}
/**
* clutter_actor_get_name:
* @self: A #ClutterActor
*
* Retrieves the name of @self.
*
* Return value: pointer to textual tag for the actor. The
* returned string is owned by the actor and should not
* be modified or freed.
*/
G_CONST_RETURN gchar *
clutter_actor_get_name (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
return self->priv->name;
}
/**
* clutter_actor_get_gid:
* @self: A #ClutterActor
*
* Retrieves the unique id for @self.
*
* Return value: Globally unique value for object instance.
*
* Since: 0.6
*/
guint32
clutter_actor_get_gid (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
return self->priv->id;
}
/**
* clutter_actor_set_depth:
* @self: a #ClutterActor
* @depth: Z co-ord
*
* Sets the Z co-ordinate of @self to @depth. The Units of which are dependant
* on the perspective setup.
*/
void
clutter_actor_set_depth (ClutterActor *self,
gint depth)
{
clutter_actor_set_depthu (self, CLUTTER_UNITS_FROM_DEVICE (depth));
}
/**
* clutter_actor_set_depthu:
* @self: a #ClutterActor
* @depth: Z co-ord in #ClutterUnit
*
* Sets the Z co-ordinate of @self to @depth in #ClutterUnit, the Units of
* which are dependant on the perspective setup.
*/
void
clutter_actor_set_depthu (ClutterActor *self,
ClutterUnit depth)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (priv->z != depth)
{
/* Sets Z value. - FIXME: should invert ?*/
priv->z = depth;
if (priv->parent_actor && CLUTTER_IS_CONTAINER (priv->parent_actor))
{
ClutterContainer *parent;
/* We need to resort the container stacking order as to
* correctly render alpha values.
*
* FIXME: This is sub optimal. maybe queue the the sort
* before stacking
*/
parent = CLUTTER_CONTAINER (priv->parent_actor);
clutter_container_sort_depth_order (parent);
}
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (self);
g_object_notify (G_OBJECT (self), "depth");
}
}
/**
* clutter_actor_get_depth:
* @self: a #ClutterActor
*
* Retrieves the depth of @self.
*
* Return value: the depth of a #ClutterActor
*/
gint
clutter_actor_get_depth (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), -1);
return CLUTTER_UNITS_TO_DEVICE (self->priv->z);
}
/**
* clutter_actor_get_depthu:
* @self: a #ClutterActor
*
* Retrieves the depth of @self.
*
* Return value: the depth of a #ClutterActor in #ClutterUnit
*
* Since: 0.6
*/
ClutterUnit
clutter_actor_get_depthu (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), -1);
return self->priv->z;
}
/**
* clutter_actor_set_rotationx:
* @self: a #ClutterActor
* @axis: the axis of rotation
* @angle: the angle of rotation
* @x: X coordinate of the rotation center
* @y: Y coordinate of the rotation center
* @z: Z coordinate of the rotation center
*
* Sets the rotation angle of @self around the given axis.
*
* This function is the fixed point variant of clutter_actor_set_rotation().
*
* Since: 0.6
*/
void
clutter_actor_set_rotationx (ClutterActor *self,
ClutterRotateAxis axis,
ClutterFixed angle,
gint x,
gint y,
gint z)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
switch (axis)
{
case CLUTTER_X_AXIS:
priv->rxang = angle;
priv->rxy = CLUTTER_UNITS_FROM_DEVICE (y);
priv->rxz = CLUTTER_UNITS_FROM_DEVICE (z);
break;
case CLUTTER_Y_AXIS:
priv->ryang = angle;
priv->ryx = CLUTTER_UNITS_FROM_DEVICE (x);
priv->ryz = CLUTTER_UNITS_FROM_DEVICE (z);
break;
case CLUTTER_Z_AXIS:
priv->rzang = angle;
priv->rzx = CLUTTER_UNITS_FROM_DEVICE (x);
priv->rzy = CLUTTER_UNITS_FROM_DEVICE (y);
break;
}
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (self);
}
/**
* clutter_actor_set_rotation:
* @self: a #ClutterActor
* @axis: the axis of rotation
* @angle: the angle of rotation
* @x: X coordinate of the rotation center
* @y: Y coordinate of the rotation center
* @z: Z coordinate of the rotation center
*
* Sets the rotation angle of @self around the given axis.
*
* The rotation center coordinates used depend on the value of @axis:
* <itemizedlist>
* <listitem><para>%CLUTTER_X_AXIS requires @y and @z</para></listitem>
* <listitem><para>%CLUTTER_Y_AXIS requires @x and @z</para></listitem>
* <listitem><para>%CLUTTER_Z_AXIS requires @x and @y</para></listitem>
* </itemizedlist>
*
* The rotation coordinates are relative to the anchor point of the
* actor, set using clutter_actor_set_anchor_point(). If no anchor
* point is set, the upper left corner is assumed as the origin.
*
* Since: 0.6
*/
void
clutter_actor_set_rotation (ClutterActor *self,
ClutterRotateAxis axis,
gdouble angle,
gint x,
gint y,
gint z)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_rotationx (self, axis,
CLUTTER_FLOAT_TO_FIXED (angle),
x, y, z);
}
/**
* clutter_actor_get_rotationx:
* @self: a #ClutterActor
* @axis: the axis of rotation
* @x: return value for the X coordinate of the center of rotation
* @y: return value for the Y coordinate of the center of rotation
* @z: return value for the Z coordinate of the center of rotation
*
* Retrieves the angle and center of rotation on the given axis,
* set using clutter_actor_set_rotation().
*
* This function is the fixed point variant of clutter_actor_get_rotation().
*
* Return value: the angle of rotation as a fixed point value.
*
* Since: 0.6
*/
ClutterFixed
clutter_actor_get_rotationx (ClutterActor *self,
ClutterRotateAxis axis,
gint *x,
gint *y,
gint *z)
{
ClutterActorPrivate *priv;
ClutterFixed retval = 0;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
priv = self->priv;
switch (axis)
{
case CLUTTER_X_AXIS:
retval = priv->rxang;
if (y)
*y = CLUTTER_UNITS_TO_DEVICE (priv->rxy);
if (z)
*z = CLUTTER_UNITS_TO_DEVICE (priv->rxz);
break;
case CLUTTER_Y_AXIS:
retval = priv->ryang;
if (x)
*x = CLUTTER_UNITS_TO_DEVICE (priv->ryx);
if (z)
*z = CLUTTER_UNITS_TO_DEVICE (priv->ryz);
break;
case CLUTTER_Z_AXIS:
retval = priv->rzang;
if (x)
*x = CLUTTER_UNITS_TO_DEVICE (priv->rzx);
if (y)
*y = CLUTTER_UNITS_TO_DEVICE (priv->rzy);
break;
}
return retval;
}
/**
* clutter_actor_get_rotation:
* @self: a #ClutterActor
* @axis: the axis of rotation
* @x: return value for the X coordinate of the center of rotation
* @y: return value for the Y coordinate of the center of rotation
* @z: return value for the Z coordinate of the center of rotation
*
* Retrieves the angle and center of rotation on the given axis,
* set using clutter_actor_set_angle().
*
* The coordinates of the center returned by this function depend on
* the axis passed.
*
* Return value: the angle of rotation.
*
* Since: 0.6
*/
gdouble
clutter_actor_get_rotation (ClutterActor *self,
ClutterRotateAxis axis,
gint *x,
gint *y,
gint *z)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0.0);
return CLUTTER_FIXED_TO_FLOAT (clutter_actor_get_rotationx (self,
axis,
x, y, z));
}
/**
* clutter_actor_set_clip:
* @self: A #ClutterActor
* @xoff: X offset of the clip rectangle
* @yoff: Y offset of the clip rectangle
* @width: Width of the clip rectangle
* @height: Height of the clip rectangle
*
* Sets clip area in pixels for @self. The clip area is always computed
* from the upper left corner of the actor, even if the anchor point is
* set otherwise.
*/
void
clutter_actor_set_clip (ClutterActor *self,
gint xoff,
gint yoff,
gint width,
gint height)
{
ClutterGeometry *clip;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clip = &(self->priv->clip);
clip->x = xoff;
clip->y = yoff;
clip->width = width;
clip->height = height;
self->priv->has_clip = TRUE;
g_object_notify (G_OBJECT (self), "has-clip");
g_object_notify (G_OBJECT (self), "clip");
}
/**
* clutter_actor_remove_clip
* @self: A #ClutterActor
*
* Removes clip area in pixels from @self.
*/
void
clutter_actor_remove_clip (ClutterActor *self)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
self->priv->has_clip = FALSE;
g_object_notify (G_OBJECT (self), "has-clip");
}
/**
* clutter_actor_has_clip:
* @self: a #ClutterActor
*
* Gets whether the actor has a clip set or not.
*
* Return value: %TRUE if the actor has a clip set.
*
* Since: 0.1.1
*/
gboolean
clutter_actor_has_clip (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
return self->priv->has_clip;
}
/**
* clutter_actor_get_clip:
* @self: a #ClutterActor
* @xoff: return location for the X offset of the clip rectangle, or %NULL
* @yoff: return location for the Y offset of the clip rectangle, or %NULL
* @width: return location for the width of the clip rectangle, or %NULL
* @height: return location for the height of the clip rectangle, or %NULL
*
* Gets the clip area for @self, in pixels.
*
* Since: 0.6
*/
void
clutter_actor_get_clip (ClutterActor *self,
gint *xoff,
gint *yoff,
gint *width,
gint *height)
{
ClutterActorPrivate *priv;
ClutterGeometry clip = { 0, };
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (!priv->has_clip)
return;
clip = priv->clip;
if (xoff)
*xoff = clip.x;
if (yoff)
*yoff = clip.y;
if (width)
*width = clip.width;
if (height)
*height = clip.height;
}
/**
* clutter_actor_set_parent:
* @self: A #ClutterActor
* @parent: A new #ClutterActor parent
*
* Sets the parent of @self to @parent. The opposite function is
* clutter_actor_unparent().
*
* This function should not be used by applications but by custom
* 'composite' actor sub classes.
*/
void
clutter_actor_set_parent (ClutterActor *self,
ClutterActor *parent)
{
ClutterMainContext *clutter_context;
clutter_context = clutter_context_get_default ();
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (CLUTTER_IS_ACTOR (parent));
g_return_if_fail (self != parent);
g_return_if_fail (clutter_context != NULL);
if (self->priv->parent_actor != NULL)
{
g_warning ("Cannot set a parent on an actor which has a parent.\n"
"You must use clutter_actor_unparent() first.\n");
return;
}
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
g_warning ("Cannot set a parent on a toplevel actor\n");
return;
}
g_hash_table_insert (clutter_context->actor_hash,
GUINT_TO_POINTER (clutter_actor_get_gid (self)),
(gpointer)self);
g_object_ref_sink (self);
self->priv->parent_actor = parent;
g_signal_emit (self, actor_signals[PARENT_SET], 0, NULL);
if (CLUTTER_ACTOR_IS_REALIZED (self->priv->parent_actor))
clutter_actor_realize (self);
if (CLUTTER_ACTOR_IS_VISIBLE (self->priv->parent_actor) &&
CLUTTER_ACTOR_IS_VISIBLE (self))
{
clutter_actor_queue_redraw (self);
}
}
/**
* clutter_actor_get_parent:
* @self: A #ClutterActor
*
* Retrieves the parent of @self.
*
* Return Value: The #ClutterActor parent or NULL
*/
ClutterActor *
clutter_actor_get_parent (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
return self->priv->parent_actor;
}
/**
* clutter_actor_unparent:
* @self: a #ClutterActor
*
* This function should not be used in applications. It should be called by
* implementations of container actors, to dissociate a child from the
* container.
*
* Since: 0.1.1
*/
void
clutter_actor_unparent (ClutterActor *self)
{
ClutterActor *old_parent;
ClutterMainContext *clutter_context;
clutter_context = clutter_context_get_default ();
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (clutter_context != NULL);
if (self->priv->parent_actor == NULL)
return;
/* just hide the actor if we are reparenting it */
if (CLUTTER_ACTOR_IS_REALIZED (self))
{
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT)
clutter_actor_hide (self);
else
clutter_actor_unrealize (self);
}
old_parent = self->priv->parent_actor;
self->priv->parent_actor = NULL;
g_signal_emit (self, actor_signals[PARENT_SET], 0, old_parent);
g_hash_table_remove (clutter_context->actor_hash,
GUINT_TO_POINTER (clutter_actor_get_gid (self)));
g_object_unref (self);
}
/**
* clutter_actor_reparent:
* @self: a #ClutterActor
* @new_parent: the new #ClutterActor parent
*
* This function resets the parent actor of @self. It is
* logically equivalent to calling clutter_actory_unparent()
* and clutter_actor_set_parent().
*
* Since: 0.2
*/
void
clutter_actor_reparent (ClutterActor *self,
ClutterActor *new_parent)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (CLUTTER_IS_ACTOR (new_parent));
g_return_if_fail (self != new_parent);
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
g_warning ("Cannot set a parent on a toplevel actor\n");
return;
}
priv = self->priv;
if (priv->parent_actor != new_parent)
{
ClutterActor *old_parent;
/* if the actor and the parent have already been realized,
* mark the actor as reparenting, so that clutter_actor_unparent()
* just hides the actor instead of unrealize it.
*/
if (CLUTTER_ACTOR_IS_REALIZED (self) &&
CLUTTER_ACTOR_IS_REALIZED (new_parent))
{
CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_REPARENT);
}
old_parent = priv->parent_actor;
g_object_ref (self);
/* FIXME: below assumes only containers can reparent */
if (CLUTTER_IS_CONTAINER (priv->parent_actor))
clutter_container_remove_actor (CLUTTER_CONTAINER (priv->parent_actor),
self);
else
priv->parent_actor = NULL;
if (CLUTTER_IS_CONTAINER (new_parent))
clutter_container_add_actor (CLUTTER_CONTAINER (new_parent), self);
else
priv->parent_actor = new_parent;
g_object_unref (self);
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT)
{
CLUTTER_UNSET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_REPARENT);
clutter_actor_queue_redraw (self);
}
}
}
/**
* clutter_actor_raise:
* @self: A #ClutterActor
* @below: A #ClutterActor to raise above.
*
* Puts @self above @below.
* Both actors must have the same parent.
*/
void
clutter_actor_raise (ClutterActor *self,
ClutterActor *below)
{
ClutterActor *parent;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
parent = clutter_actor_get_parent (self);
if (!parent)
{
g_warning ("Actor of type %s is not inside a container",
g_type_name (G_OBJECT_TYPE (self)));
return;
}
if (below)
{
if (parent != clutter_actor_get_parent (below))
{
g_warning ("Actor of type %s is not in the same "
"container of actor of type %s",
g_type_name (G_OBJECT_TYPE (self)),
g_type_name (G_OBJECT_TYPE (below)));
return;
}
}
clutter_container_raise_child (CLUTTER_CONTAINER (parent), self, below);
}
/**
* clutter_actor_lower:
* @self: A #ClutterActor
* @above: A #ClutterActor to lower below
*
* Puts @self below @above.
* Both actors must have the same parent.
*/
void
clutter_actor_lower (ClutterActor *self,
ClutterActor *above)
{
ClutterActor *parent;
g_return_if_fail (CLUTTER_IS_ACTOR(self));
parent = clutter_actor_get_parent (self);
if (!parent)
{
g_warning ("Actor of type %s is not inside a container",
g_type_name (G_OBJECT_TYPE (self)));
return;
}
if (above)
{
if (parent != clutter_actor_get_parent (above))
{
g_warning ("Actor of type %s is not in the same "
"container of actor of type %s",
g_type_name (G_OBJECT_TYPE (self)),
g_type_name (G_OBJECT_TYPE (above)));
return;
}
}
clutter_container_lower_child (CLUTTER_CONTAINER (parent), self, above);
}
/**
* clutter_actor_raise_top:
* @self: A #ClutterActor
*
* Raises @self to the top.
*/
void
clutter_actor_raise_top (ClutterActor *self)
{
clutter_actor_raise (self, NULL);
}
/**
* clutter_actor_lower_bottom:
* @self: A #ClutterActor
*
* Lowers @self to the bottom.
*/
void
clutter_actor_lower_bottom (ClutterActor *self)
{
clutter_actor_lower (self, NULL);
}
/*
* Event handling
*/
/**
* clutter_actor_event:
* @actor: a #ClutterActor
* @event: a #ClutterEvent
* @capture: TRUE if event in in capture phase, FALSE otherwise.
*
* This function is used to emit an event on the main stage.
* You should rarely need to use this function, except for
* synthetising events.
*
* Return value: the return value from the signal emission: %TRUE
* if the actor handled the event, or %FALSE if the event was
* not handled
*
* Since: 0.6
*/
gboolean
clutter_actor_event (ClutterActor *actor,
ClutterEvent *event,
gboolean capture)
{
gboolean retval = FALSE;
gint signal_num = -1;
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
g_object_ref (actor);
if (capture)
{
g_signal_emit (actor, actor_signals[CAPTURED_EVENT], 0,
event,
&retval);
goto out;
}
g_signal_emit (actor, actor_signals[EVENT], 0, event, &retval);
if (!retval)
{
switch (event->type)
{
case CLUTTER_NOTHING:
break;
case CLUTTER_BUTTON_PRESS:
signal_num = BUTTON_PRESS_EVENT;
break;
case CLUTTER_BUTTON_RELEASE:
signal_num = BUTTON_RELEASE_EVENT;
break;
case CLUTTER_SCROLL:
signal_num = SCROLL_EVENT;
break;
case CLUTTER_KEY_PRESS:
signal_num = KEY_PRESS_EVENT;
break;
case CLUTTER_KEY_RELEASE:
signal_num = KEY_RELEASE_EVENT;
break;
case CLUTTER_MOTION:
signal_num = MOTION_EVENT;
break;
case CLUTTER_ENTER:
signal_num = ENTER_EVENT;
break;
case CLUTTER_LEAVE:
signal_num = LEAVE_EVENT;
break;
case CLUTTER_DELETE:
case CLUTTER_DESTROY_NOTIFY:
case CLUTTER_CLIENT_MESSAGE:
default:
signal_num = -1;
break;
}
if (signal_num != -1)
g_signal_emit (actor, actor_signals[signal_num], 0,
event, &retval);
}
out:
g_object_unref (actor);
return retval;
}
/**
* clutter_actor_set_reactive:
* @actor: a #ClutterActor
* @reactive: whether the actor should be reactive to events
*
* Sets @actor as reactive. Reactive actors will receive events.
*
* Since: 0.6
*/
void
clutter_actor_set_reactive (ClutterActor *actor,
gboolean reactive)
{
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
if (reactive == CLUTTER_ACTOR_IS_REACTIVE (actor))
return;
if (reactive)
CLUTTER_ACTOR_SET_FLAGS (actor, CLUTTER_ACTOR_REACTIVE);
else
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REACTIVE);
}
/**
* clutter_actor_get_reactive:
* @actor: a #ClutterActor
*
* Checks whether @actor is marked as reactive.
*
* Return value: %TRUE if the actor is reactive
*
* Since: 0.6
*/
gboolean
clutter_actor_get_reactive (ClutterActor *actor)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), FALSE);
return CLUTTER_ACTOR_IS_REACTIVE (actor);
}
/**
* clutter_actor_set_anchor_point:
* @self: a #ClutterActor
* @anchor_x: X coordinate of the anchor point
* @anchor_y: Y coordinate of the anchor point
*
* Sets an anchor point for the @actor. The anchor point is a point in the
* coordinate space of an actor to which the actor position within its
* parent is relative; the default is (0, 0), i.e. the top-left corner of
* the actor.
*
* Since: 0.6
*/
void
clutter_actor_set_anchor_point (ClutterActor *self,
gint anchor_x,
gint anchor_y)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
priv->anchor_x = CLUTTER_UNITS_FROM_DEVICE (anchor_x);
priv->anchor_y = CLUTTER_UNITS_FROM_DEVICE (anchor_y);
}
/**
* clutter_actor_get_anchor_point:
* @self: a #ClutterActor
* @anchor_x: return location for the X coordinate of the anchor point
* @anchor_y: return location for the y coordinate of the anchor point
*
* Gets the current anchor point of the @actor in pixels.
*
* Since: 0.6
*/
void
clutter_actor_get_anchor_point (ClutterActor *self,
gint *anchor_x,
gint *anchor_y)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (anchor_x)
*anchor_x = CLUTTER_UNITS_TO_DEVICE (priv->anchor_x);
if (anchor_y)
*anchor_y = CLUTTER_UNITS_TO_DEVICE (priv->anchor_y);
}
/**
* clutter_actor_set_anchor_pointu:
* @self: a #ClutterActor
* @anchor_x: X coordinate of the anchor point, in #ClutterUnit<!-- -->s
* @anchor_y: Y coordinate of the anchor point, in #ClutterUnit<!-- -->s
*
* Sets an anchor point for the @self. The anchor point is a point in the
* coordinate space of an actor to which the actor position within its
* parent is relative; the default is (0, 0), i.e. the top-left corner
* of the actor.
*
* Since: 0.6
*/
void
clutter_actor_set_anchor_pointu (ClutterActor *self,
ClutterUnit anchor_x,
ClutterUnit anchor_y)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
priv->anchor_x = anchor_x;
priv->anchor_y = anchor_y;
}
/**
* clutter_actor_get_anchor_pointu:
* @self: a #ClutterActor
* @anchor_x: return location for the X coordinace of the anchor point
* @anchor_y: return location for the X coordinace of the anchor point
*
* Gets the current anchor point of the @actor in #ClutterUnit<!-- -->s.
*
* Since: 0.6
*/
void
clutter_actor_get_anchor_pointu (ClutterActor *self,
ClutterUnit *anchor_x,
ClutterUnit *anchor_y)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (anchor_x)
*anchor_x = priv->anchor_x;
if (anchor_y)
*anchor_y = priv->anchor_y;
}
/**
* clutter_actor_set_anchor_point_from_gravity:
* @self: a #ClutterActor
* @gravity: #ClutterGravity.
*
* Sets an anchor point the actor based on the given gravity (this is a
* convenience function wrapping clutter_actor_set_anchor_point()).
*
* Since: 0.6
*/
void
clutter_actor_set_anchor_point_from_gravity (ClutterActor *self,
ClutterGravity gravity)
{
ClutterActorPrivate *priv;
ClutterActorBox box;
ClutterUnit w, h, x, y;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
clutter_actor_query_coords (self, &box);
x = 0;
y = 0;
w = box.x2 - box.x1;
h = box.y2 - box.y1;
switch (gravity)
{
case CLUTTER_GRAVITY_NORTH:
x = w/2;
break;
case CLUTTER_GRAVITY_SOUTH:
x = w/2;
y = h;
break;
case CLUTTER_GRAVITY_EAST:
x = w;
y = h/2;
break;
case CLUTTER_GRAVITY_NORTH_EAST:
x = w;
break;
case CLUTTER_GRAVITY_SOUTH_EAST:
x = w;
y = h;
break;
case CLUTTER_GRAVITY_SOUTH_WEST:
y = h;
break;
case CLUTTER_GRAVITY_WEST:
y = h/2;
break;
case CLUTTER_GRAVITY_CENTER:
x = w/2;
y = h/2;
break;
case CLUTTER_GRAVITY_NONE:
case CLUTTER_GRAVITY_NORTH_WEST:
default:
break;
}
priv->anchor_x = x;
priv->anchor_y = y;
}
typedef enum
{
PARSE_X,
PARSE_Y,
PARSE_WIDTH,
PARSE_HEIGHT
} ParseDimension;
static ClutterUnit
parse_units (ClutterActor *self,
ParseDimension dimension,
JsonNode *node)
{
GValue value = { 0, };
ClutterUnit retval = 0;
if (JSON_NODE_TYPE (node) != JSON_NODE_VALUE)
return 0;
json_node_get_value (node, &value);
if (G_VALUE_HOLDS (&value, G_TYPE_INT))
{
gint pixels = g_value_get_int (&value);
retval = CLUTTER_UNITS_FROM_DEVICE (pixels);
}
else if (G_VALUE_HOLDS (&value, G_TYPE_STRING))
{
gint64 val;
gchar *end;
val = g_ascii_strtoll (g_value_get_string (&value), &end, 10);
/* assume pixels */
if (*end == '\0')
{
retval = CLUTTER_UNITS_FROM_DEVICE (val);
goto out;
}
if (strcmp (end, "px") == 0)
{
retval = CLUTTER_UNITS_FROM_DEVICE (val);
goto out;
}
if (strcmp (end, "mm") == 0)
{
retval = CLUTTER_UNITS_FROM_MM (val);
goto out;
}
if (strcmp (end, "pt") == 0)
{
retval = CLUTTER_UNITS_FROM_POINTS (val);
goto out;
}
if (end[0] == '%' && end[1] == '\0')
{
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
g_warning ("Unable to set percentage of %s on a top-level "
"actor of type `%s'",
(dimension == PARSE_X || dimension == PARSE_WIDTH) ? "width"
: "height",
g_type_name (G_OBJECT_TYPE (self)));
retval = 0;
goto out;
}
if (dimension == PARSE_X || dimension == PARSE_WIDTH)
retval = CLUTTER_UNITS_FROM_STAGE_WIDTH_PERCENTAGE (val);
else
retval = CLUTTER_UNITS_FROM_STAGE_HEIGHT_PERCENTAGE (val);
goto out;
}
g_warning ("Invalid value `%s': integers, strings or floating point "
"values can be used for the x, y, width and height "
"properties. Valid modifiers for strings are `px', 'mm' "
"and '%%'.",
g_value_get_string (&value));
retval = 0;
}
else if (G_VALUE_HOLDS (&value, G_TYPE_DOUBLE))
{
gint val;
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
g_warning ("Unable to set percentage of %s on a top-level "
"actor of type `%s'",
(dimension == PARSE_X || dimension == PARSE_WIDTH) ? "width"
: "height",
g_type_name (G_OBJECT_TYPE (self)));
retval = 0;
goto out;
}
val = CLAMP (g_value_get_double (&value) * 100, 0, 100);
if (dimension == PARSE_X || dimension == PARSE_WIDTH)
retval = CLUTTER_UNITS_FROM_STAGE_WIDTH_PERCENTAGE (val);
else
retval = CLUTTER_UNITS_FROM_STAGE_HEIGHT_PERCENTAGE (val);
}
else
{
g_warning ("Invalid value of type `%s': integers, strings of floating "
"point values can be used for the x, y, width and height "
"properties.",
g_type_name (G_VALUE_TYPE (&value)));
}
out:
g_value_unset (&value);
return retval;
}
typedef struct {
ClutterRotateAxis axis;
gdouble angle;
ClutterUnit center_x;
ClutterUnit center_y;
ClutterUnit center_z;
} RotationInfo;
static gboolean
parse_rotation_array (ClutterActor *actor,
JsonNode *node,
RotationInfo *info)
{
JsonArray *array = json_node_get_array (node);
JsonNode *element;
if (json_array_get_length (array) != 2)
return FALSE;
/* angle */
element = json_array_get_element (array, 0);
if (JSON_NODE_TYPE (element) == JSON_NODE_VALUE)
info->angle = json_node_get_double (element);
else
return FALSE;
/* center */
element = json_array_get_element (array, 1);
if (JSON_NODE_TYPE (element) == JSON_NODE_ARRAY)
{
JsonArray *array = json_node_get_array (element);
if (json_array_get_length (array) != 2)
return FALSE;
switch (info->axis)
{
case CLUTTER_X_AXIS:
info->center_y = parse_units (actor, PARSE_Y,
json_array_get_element (array, 0));
info->center_z = parse_units (actor, PARSE_Y,
json_array_get_element (array, 1));
return TRUE;
case CLUTTER_Y_AXIS:
info->center_x = parse_units (actor, PARSE_X,
json_array_get_element (array, 0));
info->center_z = parse_units (actor, PARSE_X,
json_array_get_element (array, 1));
return TRUE;
case CLUTTER_Z_AXIS:
info->center_x = parse_units (actor, PARSE_X,
json_array_get_element (array, 0));
info->center_y = parse_units (actor, PARSE_Y,
json_array_get_element (array, 1));
return TRUE;
}
}
return FALSE;
}
static gboolean
parse_rotation (ClutterActor *actor,
JsonNode *node,
RotationInfo *info)
{
JsonArray *array;
guint len, i;
gboolean retval = FALSE;
if (JSON_NODE_TYPE (node) != JSON_NODE_ARRAY)
{
g_warning ("Invalid node of type `%s' found, expecting an array",
json_node_type_name (node));
return FALSE;
}
array = json_node_get_array (node);
len = json_array_get_length (array);
for (i = 0; i < len; i++)
{
JsonNode *element = json_array_get_element (array, i);
JsonObject *object;
JsonNode *member;
if (JSON_NODE_TYPE (element) != JSON_NODE_OBJECT)
{
g_warning ("Invalid node of type `%s' found, expecting an object",
json_node_type_name (element));
return FALSE;
}
object = json_node_get_object (element);
if (json_object_has_member (object, "x-axis"))
{
member = json_object_get_member (object, "x-axis");
info->axis = CLUTTER_X_AXIS;
if (JSON_NODE_TYPE (member) == JSON_NODE_VALUE)
{
info->angle = json_node_get_double (member);
retval = TRUE;
}
else if (JSON_NODE_TYPE (member) == JSON_NODE_ARRAY)
retval = parse_rotation_array (actor, member, info);
else
retval = FALSE;
}
else if (json_object_has_member (object, "y-axis"))
{
member = json_object_get_member (object, "y-axis");
info->axis = CLUTTER_Y_AXIS;
if (JSON_NODE_TYPE (member) == JSON_NODE_VALUE)
{
info->angle = json_node_get_double (member);
retval = TRUE;
}
else if (JSON_NODE_TYPE (member) == JSON_NODE_ARRAY)
retval = parse_rotation_array (actor, member, info);
else
retval = FALSE;
}
else if (json_object_has_member (object, "z-axis"))
{
member = json_object_get_member (object, "z-axis");
info->axis = CLUTTER_Z_AXIS;
if (JSON_NODE_TYPE (member) == JSON_NODE_VALUE)
{
info->angle = json_node_get_double (member);
retval = TRUE;
}
else if (JSON_NODE_TYPE (member) == JSON_NODE_ARRAY)
retval = parse_rotation_array (actor, member, info);
else
retval = FALSE;
}
}
return retval;
}
static gboolean
clutter_actor_parse_custom_node (ClutterScriptable *scriptable,
ClutterScript *script,
GValue *value,
const gchar *name,
JsonNode *node)
{
ClutterActor *actor = CLUTTER_ACTOR (scriptable);
gboolean retval = FALSE;
if ((name[0] == 'x' && name[1] == '\0') ||
(name[0] == 'y' && name[1] == '\0') ||
(strcmp (name, "width") == 0) ||
(strcmp (name, "height") == 0))
{
ClutterUnit units;
ParseDimension dimension;
if (name[0] == 'x')
dimension = PARSE_X;
else if (name[0] == 'y')
dimension = PARSE_Y;
else if (name[0] == 'w')
dimension = PARSE_WIDTH;
else
dimension = PARSE_HEIGHT;
units = parse_units (actor, dimension, node);
/* convert back to pixels */
g_value_init (value, G_TYPE_INT);
g_value_set_int (value, CLUTTER_UNITS_TO_DEVICE (units));
retval = TRUE;
}
else if (strcmp (name, "rotation") == 0)
{
RotationInfo *info;
info = g_slice_new0 (RotationInfo);
retval = parse_rotation (actor, node, info);
if (retval)
{
g_value_init (value, G_TYPE_POINTER);
g_value_set_pointer (value, info);
}
else
g_slice_free (RotationInfo, info);
}
return retval;
}
static void
clutter_actor_set_custom_property (ClutterScriptable *scriptable,
ClutterScript *script,
const gchar *name,
const GValue *value)
{
if (strcmp (name, "rotation") == 0)
{
RotationInfo *info;
if (!G_VALUE_HOLDS (value, G_TYPE_POINTER))
return;
info = g_value_get_pointer (value);
clutter_actor_set_rotation (CLUTTER_ACTOR (scriptable),
info->axis, info->angle,
CLUTTER_UNITS_TO_DEVICE (info->center_x),
CLUTTER_UNITS_TO_DEVICE (info->center_y),
CLUTTER_UNITS_TO_DEVICE (info->center_z));
g_slice_free (RotationInfo, info);
}
else
g_object_set_property (G_OBJECT (scriptable), name, value);
}
static void
clutter_scriptable_iface_init (ClutterScriptableIface *iface)
{
iface->parse_custom_node = clutter_actor_parse_custom_node;
iface->set_custom_property = clutter_actor_set_custom_property;
}
/**
* clutter_actor_transform_stage_point
* @self: A #ClutterActor
* @x: x screen coordinate of the point to unproject, in #ClutterUnit<!-- -->s
* @y: y screen coordinate of the point to unproject, in #ClutterUnit<!-- -->s
* @x_out: return location for the unprojected x coordinance, in
* #ClutterUnit<!-- -->s
* @y_out: return location for the unprojected y coordinance, in
* #ClutterUnit<!-- -->s
*
* The function translates point with screen coordinates (@x, @y) to
* coordinates relative to the actor, i.e. it can be used to translate
* screen events from global screen coordinates into local coordinates.
*
* The conversion can fail, notably if the transform stack results in the
* actor being projected on the screen as a mere line.
*
* The conversion should not be expected to be pixel-perfect due to the
* nature of the operation. In general the error grows when the skewing
* of the actor rectangle on screen increases.
*
* Note: This function is fairly computationally intensive.
*
* Return value: %TRUE if conversion was successful.
*
* Since: 0.6
*/
gboolean
clutter_actor_transform_stage_point (ClutterActor *self,
ClutterUnit x,
ClutterUnit y,
ClutterUnit *x_out,
ClutterUnit *y_out)
{
ClutterVertex v[4];
ClutterFixed ST[3][3];
ClutterFixed RQ[3][3];
int du, dv, xi, yi;
ClutterFixed xf, yf, wf, px, py, det;
ClutterActorPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
priv = self->priv;
/*
* This implementation is based on the quad -> quad projection algorithm
* described by Paul Heckbert in
*
* http://www.cs.cmu.edu/~ph/texfund/texfund.pdf
*
* and the sample implementaion at http://www.cs.cmu.edu/~ph/src/texfund/.
*
* Our texture is a rectangle with origin [0,0], so we are mapping from quad
* to rectangle only, which significantly simplifies things; the function
* calls have been unrolled, and most of the math is done in fixed point.
*/
clutter_actor_get_vertices (self, v);
/*
* Keeping these as ints simplifies the multiplication (no significant loss
* of precission here).
*/
du = CLUTTER_UNITS_TO_DEVICE (priv->coords.x2 - priv->coords.x1);
dv = CLUTTER_UNITS_TO_DEVICE (priv->coords.y2 - priv->coords.y1);
if (!du || !dv)
return FALSE;
#define FP2FX CLUTTER_FLOAT_TO_FIXED
#define FX2FP CLUTTER_FIXED_TO_DOUBLE
#define FP2INT CLUTTER_FLOAT_TO_INT
#define DET2X(a,b, c,d) (CFX_QMUL(a,d) - CFX_QMUL(b,c))
/*
* First, find mapping from unit uv square to xy quadrilateral; this
* equivalent to the pmap_square_quad() functions in the sample
* implementation, which we can simplify, since our target is always
* a rectangle.
*/
px = v[0].x - v[1].x + v[3].x - v[2].x;
py = v[0].y - v[1].y + v[3].y - v[2].y;
if (!px && !py)
{ /* affine transform */
RQ[0][0] = v[1].x - v[0].x;
RQ[1][0] = v[3].x - v[1].x;
RQ[2][0] = v[0].x;
RQ[0][1] = v[1].y - v[0].y;
RQ[1][1] = v[3].y - v[1].y;
RQ[2][1] = v[0].y;
RQ[0][2] = 0;
RQ[1][2] = 0;
RQ[2][2] = CFX_ONE;
}
else
{ /* projective transform */
ClutterFixed dx1, dx2, dy1, dy2, del;
dx1 = v[1].x - v[3].x;
dx2 = v[2].x - v[3].x;
dy1 = v[1].y - v[3].y;
dy2 = v[2].y - v[3].y;
del = DET2X (dx1,dx2, dy1,dy2);
if (!del)
return FALSE;
/*
* The division here needs to be done in floating point for
* precisions reasons.
*/
RQ[0][2] = FP2FX (FX2FP (DET2X (px,dx2, py,dy2) / FX2FP (del)));
RQ[1][2] = FP2FX (FX2FP (DET2X (dx1,px, dy1,py) / FX2FP (del)));
RQ[1][2] = CFX_DIV (DET2X(dx1,px, dy1,py), del);
RQ[2][2] = CFX_ONE;
RQ[0][0] = v[1].x - v[0].x + CFX_QMUL (RQ[0][2], v[1].x);
RQ[1][0] = v[2].x - v[0].x + CFX_QMUL (RQ[1][2], v[2].x);
RQ[2][0] = v[0].x;
RQ[0][1] = v[1].y - v[0].y + CFX_QMUL (RQ[0][2], v[1].y);
RQ[1][1] = v[2].y - v[0].y + CFX_QMUL (RQ[1][2], v[2].y);
RQ[2][1] = v[0].y;
}
/*
* Now combine with transform from our rectangle (u0,v0,u1,v1) to unit
* square. Since our rectangle is based at 0,0 we only need to scale.
*/
RQ[0][0] /= du;
RQ[1][0] /= dv;
RQ[0][1] /= du;
RQ[1][1] /= dv;
RQ[0][2] /= du;
RQ[1][2] /= dv;
/*
* Now RQ is transform from uv rectangle to xy quadrilateral; we need an
* inverse of that.
*/
ST[0][0] = DET2X(RQ[1][1], RQ[1][2], RQ[2][1], RQ[2][2]);
ST[1][0] = DET2X(RQ[1][2], RQ[1][0], RQ[2][2], RQ[2][0]);
ST[2][0] = DET2X(RQ[1][0], RQ[1][1], RQ[2][0], RQ[2][1]);
ST[0][1] = DET2X(RQ[2][1], RQ[2][2], RQ[0][1], RQ[0][2]);
ST[1][1] = DET2X(RQ[2][2], RQ[2][0], RQ[0][2], RQ[0][0]);
ST[2][1] = DET2X(RQ[2][0], RQ[2][1], RQ[0][0], RQ[0][1]);
ST[0][2] = DET2X(RQ[0][1], RQ[0][2], RQ[1][1], RQ[1][2]);
ST[1][2] = DET2X(RQ[0][2], RQ[0][0], RQ[1][2], RQ[1][0]);
ST[2][2] = DET2X(RQ[0][0], RQ[0][1], RQ[1][0], RQ[1][1]);
/*
* Check the resutling martix is OK.
*/
det = CFX_QMUL (RQ[0][0], ST[0][0]) + CFX_QMUL (RQ[0][1], ST[0][1]) +
CFX_QMUL (RQ[0][2], ST[0][2]);
if (!det)
return FALSE;
/*
* Now transform our point with the ST matrix; the notional w coordiance
* is 1, hence the last part is simply added.
*/
xi = CLUTTER_UNITS_TO_DEVICE (x);
yi = CLUTTER_UNITS_TO_DEVICE (y);
xf = xi*ST[0][0] + yi*ST[1][0] + ST[2][0];
yf = xi*ST[0][1] + yi*ST[1][1] + ST[2][1];
wf = xi*ST[0][2] + yi*ST[1][2] + ST[2][2];
/*
* The division needs to be done in floating point for precission reasons.
*/
*x_out = CLUTTER_UNITS_FROM_FLOAT (FX2FP (xf) / FX2FP (wf));
*y_out = CLUTTER_UNITS_FROM_FLOAT (FX2FP (yf) / FX2FP (wf));
#undef FP2FX
#undef FX2FP
#undef FP2INT
#undef DET2X
return TRUE;
}
/*
* ClutterGeometry
*/
static ClutterGeometry*
clutter_geometry_copy (const ClutterGeometry *geometry)
{
ClutterGeometry *result = g_slice_new (ClutterGeometry);
*result = *geometry;
return result;
}
static void
clutter_geometry_free (ClutterGeometry *geometry)
{
if (G_LIKELY (geometry))
g_slice_free (ClutterGeometry, geometry);
}
GType
clutter_geometry_get_type (void)
{
static GType our_type = 0;
if (G_UNLIKELY (our_type == 0))
our_type =
g_boxed_type_register_static (I_("ClutterGeometry"),
(GBoxedCopyFunc) clutter_geometry_copy,
(GBoxedFreeFunc) clutter_geometry_free);
return our_type;
}
/*
* ClutterVertices
*/
static ClutterVertex *
clutter_vertex_copy (const ClutterVertex *vertex)
{
ClutterVertex *result = g_slice_new (ClutterVertex);
*result = *vertex;
return result;
}
static void
clutter_vertex_free (ClutterVertex *vertex)
{
if (G_UNLIKELY (vertex))
g_slice_free (ClutterVertex, vertex);
}
GType
clutter_vertex_get_type (void)
{
static GType our_type = 0;
if (G_UNLIKELY (our_type == 0))
our_type =
g_boxed_type_register_static (I_("ClutterVertex"),
(GBoxedCopyFunc) clutter_vertex_copy,
(GBoxedFreeFunc) clutter_vertex_free);
return our_type;
}
/*
* ClutterActorBox
*/
static ClutterActorBox *
clutter_actor_box_copy (const ClutterActorBox *box)
{
ClutterActorBox *result = g_slice_new (ClutterActorBox);
*result = *box;
return result;
}
static void
clutter_actor_box_free (ClutterActorBox *box)
{
if (G_LIKELY (box))
g_slice_free (ClutterActorBox, box);
}
GType
clutter_actor_box_get_type (void)
{
static GType our_type = 0;
if (G_UNLIKELY (our_type == 0))
our_type =
g_boxed_type_register_static (I_("ClutterActorBox"),
(GBoxedCopyFunc) clutter_actor_box_copy,
(GBoxedFreeFunc) clutter_actor_box_free);
return our_type;
}
/******************************************************************************/
typedef struct _BoxedFloat BoxedFloat;
struct _BoxedFloat
{
gfloat value;
};
static void
boxed_float_free (gpointer data)
{
if (G_LIKELY (data))
g_slice_free (BoxedFloat, data);
}
struct _ShaderData
{
ClutterShader *shader;
GHashTable *float1f_hash; /*< list of values that should be set
* on the shader before each paint cycle
*/
};
static void
destroy_shader_data (ClutterActor *self)
{
ClutterActorPrivate *actor_priv = self->priv;
ShaderData *shader_data = actor_priv->shader_data;
if (!shader_data)
return;
if (shader_data->shader)
{
g_object_unref (shader_data->shader);
shader_data->shader = NULL;
}
if (shader_data->float1f_hash)
{
g_hash_table_destroy (shader_data->float1f_hash);
shader_data->float1f_hash = NULL;
}
g_free (shader_data);
actor_priv->shader_data = NULL;
}
/**
* clutter_actor_apply_shader:
* @self: a #ClutterActor
* @shader: a #ClutterShader or %NULL
*
* Sets the #ClutterShader to be applied on @self.
*
* Return value: %TRUE if the shader was successfully applied
*
* Since: 0.6
*/
gboolean
clutter_actor_apply_shader (ClutterActor *self,
ClutterShader *shader)
{
ClutterActorPrivate *actor_priv;
ShaderData *shader_data;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
g_return_val_if_fail (shader == NULL || CLUTTER_IS_SHADER (shader), FALSE);
actor_priv = self->priv;
shader_data = actor_priv->shader_data;
if (!shader_data)
{
actor_priv->shader_data = shader_data = g_new0 (ShaderData, 1);
shader_data->float1f_hash =
g_hash_table_new_full (g_str_hash, g_str_equal,
g_free,
boxed_float_free);
}
if (shader_data->shader)
{
g_object_unref (shader_data->shader);
shader_data->shader = NULL;
}
if (shader)
shader_data->shader = g_object_ref (shader);
clutter_actor_queue_redraw (self);
return TRUE;
}
static void
set_each_param (gpointer key,
gpointer value,
gpointer user_data)
{
ClutterShader *shader = CLUTTER_SHADER (user_data);
BoxedFloat *box = value;
clutter_shader_set_uniform_1f (shader, key, box->value);
}
static void
clutter_actor_shader_pre_paint (ClutterActor *actor,
gboolean repeat)
{
ClutterActorPrivate *priv;
ShaderData *shader_data;
ClutterShader *shader;
ClutterMainContext *context;
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = actor->priv;
shader_data = priv->shader_data;
if (!shader_data)
return;
context = clutter_context_get_default ();
shader = shader_data->shader;
if (shader)
{
clutter_shader_set_is_enabled (shader, TRUE);
g_hash_table_foreach (shader_data->float1f_hash, set_each_param, shader);
if (!repeat)
context->shaders = g_slist_prepend (context->shaders, actor);
}
}
static void
clutter_actor_shader_post_paint (ClutterActor *actor)
{
ClutterActorPrivate *priv;
ShaderData *shader_data;
ClutterShader *shader;
ClutterMainContext *context;
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = actor->priv;
shader_data = priv->shader_data;
if (!shader_data)
return;
context = clutter_context_get_default ();
shader = shader_data->shader;
if (shader)
{
clutter_shader_set_is_enabled (shader, FALSE);
context->shaders = g_slist_remove (context->shaders, actor);
if (context->shaders)
{
/* call pre-paint again, this time with the second argument being
* TRUE, indicating that we are reapplying the shader and thus
* should not be prepended to the stack
*/
clutter_actor_shader_pre_paint (context->shaders->data, TRUE);
}
}
}
/**
* clutter_actor_set_shader_param:
* @self: a #ClutterActor
* @param: the name of the parameter
* @value: the value of the parameter
*
* Sets the value for a named parameter of the shader applied
* to @actor.
*
* Since: 0.6
*/
void
clutter_actor_set_shader_param (ClutterActor *self,
const gchar *param,
gfloat value)
{
ClutterActorPrivate *priv;
ShaderData *shader_data;
BoxedFloat *box;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (param != NULL);
priv = self->priv;
shader_data = priv->shader_data;
if (!shader_data)
return;
box = g_slice_new (BoxedFloat);
box->value = value;
g_hash_table_insert (shader_data->float1f_hash, g_strdup (param), box);
}
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