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mutter/examples/video-cube.c
Emmanuele Bassi 212c4a0ee8 2006-07-06 Emmanuele Bassi <ebassi@openedhand.com> 
Big rework of the actor management semantics: now ClutterActor
	objects behave like GtkObjects - that is they have an initial
	"floating" reference that gets "sunk" when they are added to
	a ClutterGroup.  This makes a group responsible of de-allocating
	each actor inside it, so you just have to destroy the group to
	get every child actor destroyed.  Also, now you can do:

	  clutter_group_add (group, clutter_video_texture_new ());
	
	without having to care about reference counting and explicit
	unreffing.

	* clutter/clutter-private.h: Add private flags setter and
	getter macros.

	* clutter/clutter-actor.h:
	* clutter/clutter-actor.c: Clean up; inherit from GInitiallyUnowned;
	add a "visible" property; add the "destroy", "show" and "hide"
	signals to ClutterActorClass.

	(clutter_actor_show), (clutter_actor_hide): Refactor a bit; emit
	the "show" and "hide" signals.

	(clutter_actor_set_property), (clutter_actor_get_property),
	(clutter_actor_class_init): Implement the "visible" property; add
	signals.

	(clutter_actor_finalize): Do not leak the actor's name, if it is
	set.
	
	(clutter_actor_dispose): Emit the "destroy" signal here.

	(clutter_actor_init): Sink the initial floating flag if needed.

	(clutter_actor_destroy): Add a function to explicitely destroy
	a ClutterActor.

	(clutter_actor_set_parent), (clutter_actor_get_parent),
	(clutter_actor_unparent): Make set_parent require a valid parent;
	add unparent; check on get_parent; ref_sink the actor when
	setting its parent and unref it when unsetting it.  Probably we'll
	need a function that does reparenting as unparent+set_parent in
	a single shot.

	* clutter/clutter-group.h:
	* clutter/clutter-group.c (clutter_group_dispose),
	(clutter_group_finalize), (clutter_group_add),
	(clutter_group_remove): Make the group destroy its children when
	disposing it; clean up, and use the newly-available
	clutter_actor_unparent().

	* clutter/clutter-stage.h:
	* clutter/clutter-stage.c (clutter_stage_init): ClutterStage is
	a top-level actor; clean up.

	* clutter/clutter-video-texture.h:
	* clutter/clutter-video-texture.c: Clean up.

	* examples/super-oh.c:
	* examples/test.c:
	* examples/video-player.c:
	* examples/test-text.c:
	* examples/video-cube.c: Remove the g_object_unref() call, as the
	ClutterStage object is destroyed on clutter_main_quit().
2006-07-06 17:52:57 +00:00

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/* HACK HACK. HACK.
* This is just a quick hack to see if a 3D type video cube
* would be possible with clutter. It needs many hacks cleaning.
*/
#include <clutter/clutter.h>
#include <glib-object.h>
#include <math.h> /* for M_PI */
#define WINWIDTH 800
#define WINHEIGHT 600
/* lazy globals */
static float xrot, yrot, zrot;
/* Avoid needing GLUT perspective call */
static void
frustum (GLfloat left,
GLfloat right,
GLfloat bottom,
GLfloat top,
GLfloat nearval,
GLfloat farval)
{
GLfloat x, y, a, b, c, d;
GLfloat m[16];
x = (2.0 * nearval) / (right - left);
y = (2.0 * nearval) / (top - bottom);
a = (right + left) / (right - left);
b = (top + bottom) / (top - bottom);
c = -(farval + nearval) / ( farval - nearval);
d = -(2.0 * farval * nearval) / (farval - nearval);
#define M(row,col) m[col*4+row]
M(0,0) = x; M(0,1) = 0.0F; M(0,2) = a; M(0,3) = 0.0F;
M(1,0) = 0.0F; M(1,1) = y; M(1,2) = b; M(1,3) = 0.0F;
M(2,0) = 0.0F; M(2,1) = 0.0F; M(2,2) = c; M(2,3) = d;
M(3,0) = 0.0F; M(3,1) = 0.0F; M(3,2) = -1.0F; M(3,3) = 0.0F;
#undef M
glMultMatrixf (m);
}
static void
perspective (GLfloat fovy,
GLfloat aspect,
GLfloat zNear,
GLfloat zFar)
{
GLfloat xmin, xmax, ymin, ymax;
ymax = zNear * tan (fovy * M_PI / 360.0);
ymin = -ymax;
xmin = ymin * aspect;
xmax = ymax * aspect;
frustum (xmin, xmax, ymin, ymax, zNear, zFar);
}
/* video texture subclass */
#define CLUTTER_TYPE_VIDEO_TEXTURE_CUBE clutter_video_texture_cube_get_type()
#define CLUTTER_VIDEO_TEXTURE_CUBE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), \
CLUTTER_TYPE_VIDEO_TEXTURE_CUBE, ClutterVideoTextureCube))
#define CLUTTER_VIDEO_TEXTURE_CUBE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), \
CLUTTER_TYPE_VIDEO_TEXTURE_CUBE, ClutterVideoTextureCubeClass))
#define CLUTTER_IS_VIDEO_TEXTURE_CUBE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
CLUTTER_TYPE_VIDEO_TEXTURE_CUBE))
#define CLUTTER_IS_VIDEO_TEXTURE_CUBE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), \
CLUTTER_TYPE_VIDEO_TEXTURE_CUBE))
#define CLUTTER_VIDEO_TEXTURE_CUBE_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), \
CLUTTER_TYPE_VIDEO_TEXTURE_CUBE, ClutterVideoTextureCubeClass))
typedef struct ClutterVideoTextureCubePrivate ClutterVideoTextureCubePrivate ;
typedef struct ClutterVideoTextureCube
{
ClutterVideoTexture parent;
ClutterVideoTextureCubePrivate *priv;
}
ClutterVideoTextureCube;
typedef struct ClutterVideoTextureCubeClass
{
ClutterVideoTextureClass parent_class;
}
ClutterVideoTextureCubeClass;
GType clutter_video_texture_cube_get_type (void);
G_DEFINE_TYPE (ClutterVideoTextureCube, clutter_video_texture_cube, CLUTTER_TYPE_VIDEO_TEXTURE);
static void
clutter_video_texture_cube_paint (ClutterActor *self)
{
if (clutter_texture_get_pixbuf (CLUTTER_TEXTURE(self)) == NULL)
return;
if (!CLUTTER_ACTOR_IS_REALIZED (CLUTTER_ACTOR(self)))
clutter_actor_realize (CLUTTER_ACTOR(self));
if (!clutter_texture_has_generated_tiles (CLUTTER_TEXTURE(self)))
return;
/* HACK: sets up a 3D tranform matrix other than regular 2D one */
/* FIXME: figure out how to nicely combine both within clutter */
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
perspective (45.0f,
(GLfloat)WINWIDTH/(GLfloat)WINHEIGHT,
0.1f,
100.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
/* back camera out a little */
glTranslatef(0.0f,0.0f,-3.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_TEXTURE_2D);
glShadeModel(GL_SMOOTH);
glClearDepth(1.0f);
glDepthFunc(GL_LEQUAL);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
glRotatef(xrot,1.0f,0.0f,0.0f);
glRotatef(yrot,0.0f,1.0f,0.0f);
glRotatef(zrot,0.0f,0.0f,1.0f);
/* HACK: Cheat as just bind to first tiled as squared */
clutter_texture_bind_tile (CLUTTER_TEXTURE(self), 0);
glBegin(GL_QUADS);
// Front Face
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
// Back Face
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
// Top Face
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
// Bottom Face
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
// Right face
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
// Left Face
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
glEnd();
/* HACK: reset to regular transform */
#if 0
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
glOrtho (0, WINWIDTH, WINHEIGHT, 0, -1, 1);
glMatrixMode (GL_MODELVIEW);
glLoadIdentity ();
#endif
/* rotate */
xrot+=1.0f;
yrot+=1.0f;
zrot+=1.0f;
}
static void
clutter_video_texture_cube_class_init (ClutterVideoTextureCubeClass *klass)
{
GObjectClass *gobject_class;
ClutterActorClass *actor_class;
gobject_class = (GObjectClass*)klass;
actor_class = (ClutterActorClass*)klass;
actor_class->paint = clutter_video_texture_cube_paint;
}
static void
clutter_video_texture_cube_init (ClutterVideoTextureCube *self)
{
}
ClutterActor*
clutter_video_texture_cube_new (GError **err)
{
return CLUTTER_ACTOR(g_object_new (CLUTTER_TYPE_VIDEO_TEXTURE_CUBE,
/* "tiled", FALSE, */
NULL));
}
int
main (int argc, char *argv[])
{
ClutterActor *label, *texture, *vtexture;
ClutterActor *stage;
GdkPixbuf *pixbuf;
GError *err = NULL;
if (argc < 2)
g_error("%s <video file>", argv[0]);
clutter_init (&argc, &argv);
stage = clutter_stage_get_default ();
g_signal_connect (stage, "key-press-event",
G_CALLBACK (clutter_main_quit), NULL);
pixbuf = gdk_pixbuf_new_from_file ("clutter-logo-800x600.png", NULL);
if (!pixbuf)
g_error("pixbuf load failed");
clutter_actor_set_size (stage,
WINWIDTH, WINHEIGHT);
texture = clutter_texture_new_from_pixbuf (pixbuf);
vtexture = clutter_video_texture_cube_new (&err);
if (vtexture == NULL || err != NULL)
{
g_error("failed to create vtexture, err: %s", err->message);
}
clutter_media_set_filename (CLUTTER_MEDIA(vtexture), argv[1]);
clutter_group_add (CLUTTER_GROUP (stage), texture);
clutter_group_add (CLUTTER_GROUP (stage), vtexture);
clutter_group_show_all (CLUTTER_GROUP (stage));
clutter_media_set_playing(CLUTTER_MEDIA(vtexture), TRUE);
clutter_main();
return 0;
}
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