mutter/tests/test-cogl-offscreen.c

#include <config.h>
#include <glib.h>
#include <stdlib.h>
#include <clutter/clutter.h>
#include <cogl/cogl.h>

/* Coglbox declaration
 *--------------------------------------------------*/

G_BEGIN_DECLS
  
#define TEST_TYPE_COGLBOX test_coglbox_get_type()

#define TEST_COGLBOX(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST ((obj), \
  TEST_TYPE_COGLBOX, TestCoglboxClass))

#define TEST_COGLBOX_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST ((klass), \
  TEST_TYPE_COGLBOX, TestCoglboxClass))

#define TEST_IS_COGLBOX(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
  TEST_TYPE_COGLBOX))

#define TEST_IS_COGLBOX_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_TYPE ((klass), \
  TEST_TYPE_COGLBOX))

#define TEST_COGLBOX_GET_CLASS(obj) \
  (G_TYPE_INSTANCE_GET_CLASS ((obj), \
  TEST_TYPE_COGLBOX, TestCoglboxClass))

typedef struct _TestCoglbox        TestCoglbox;
typedef struct _TestCoglboxClass   TestCoglboxClass;
typedef struct _TestCoglboxPrivate TestCoglboxPrivate;

struct _TestCoglbox
{
  ClutterActor           parent;

  /*< private >*/
  TestCoglboxPrivate *priv;
};

struct _TestCoglboxClass 
{
  ClutterActorClass parent_class;

  /* padding for future expansion */
  void (*_test_coglbox1) (void);
  void (*_test_coglbox2) (void);
  void (*_test_coglbox3) (void);
  void (*_test_coglbox4) (void);
};

GType test_coglbox_get_type (void) G_GNUC_CONST;

G_END_DECLS

/* Coglbox private declaration
 *--------------------------------------------------*/

G_DEFINE_TYPE (TestCoglbox, test_coglbox, CLUTTER_TYPE_ACTOR);

#define TEST_COGLBOX_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), TEST_TYPE_COGLBOX, TestCoglboxPrivate))

struct _TestCoglboxPrivate
{
  CoglHandle texhand_id;
  CoglHandle texture_id;
  CoglHandle offscreen_id;
};

/* Coglbox implementation
 *--------------------------------------------------*/

static void
test_coglbox_paint(ClutterActor *self)
{
  TestCoglboxPrivate *priv = TEST_COGLBOX_GET_PRIVATE (self);
  
  ClutterColor cback       = {0x66, 0x66, 0xDD, 0xFF};
  ClutterColor cred        = {0xFF, 0x0,  0x0,  0xFF};
  ClutterColor cgreen      = {0x0,  0xFF, 0x0,  0xFF};
  ClutterColor cfullopaque = {0xFF, 0xFF, 0xFF, 0xFF};
  ClutterColor chalfopaque = {0xFF, 0xFF, 0xFF, 0x88};
  
  ClutterFixed texcoords[4] = {
    CLUTTER_FLOAT_TO_FIXED (0.0f),
    CLUTTER_FLOAT_TO_FIXED (0.0f),
    CLUTTER_FLOAT_TO_FIXED (1.0f),
    CLUTTER_FLOAT_TO_FIXED (1.0f)
    };
  
  priv = TEST_COGLBOX_GET_PRIVATE (self);
  
  cogl_color (&cback);
  cogl_rectangle (0,0,400,400);
  
  cogl_color (&cfullopaque);
  cogl_texture_rectangle (priv->texhand_id,
			  0,0,
			  CLUTTER_INT_TO_FIXED (400),
			  CLUTTER_INT_TO_FIXED (400),
			  0,0,
			  CLUTTER_INT_TO_FIXED (6),
			  CLUTTER_INT_TO_FIXED (6));
  
  cogl_draw_buffer (COGL_OFFSCREEN_BUFFER, priv->offscreen_id);
  
  cogl_color (&cred);
  cogl_rectangle (20,20,100,100);
  
  cogl_color (&cgreen);
  cogl_rectangle (80,80,100,100);
  
  cogl_draw_buffer (COGL_WINDOW_BUFFER, 0);
  
  cogl_color (&chalfopaque);
  cogl_texture_rectangle (priv->texture_id,
			  CLUTTER_INT_TO_FIXED (100),
			  CLUTTER_INT_TO_FIXED (100),
			  CLUTTER_INT_TO_FIXED (300),
			  CLUTTER_INT_TO_FIXED (300),
			  texcoords[0],
			  texcoords[1],
			  texcoords[2],
			  texcoords[3]);
}

static void
test_coglbox_finalize (GObject *object)
{
  G_OBJECT_CLASS (test_coglbox_parent_class)->finalize (object);
}

static void
test_coglbox_dispose (GObject *object)
{
  TestCoglboxPrivate *priv;
  
  priv = TEST_COGLBOX_GET_PRIVATE (object);
  
  cogl_texture_unref (priv->texture_id);
  cogl_offscreen_unref (priv->offscreen_id);
  
  G_OBJECT_CLASS (test_coglbox_parent_class)->dispose (object);
}

static void
test_coglbox_init (TestCoglbox *self)
{
  TestCoglboxPrivate *priv;
  self->priv = priv = TEST_COGLBOX_GET_PRIVATE(self);
  
  printf ("Loading redhand.png\n");
  priv->texhand_id = cogl_texture_new_from_file ("redhand.png", 0, FALSE,
						 COGL_PIXEL_FORMAT_ANY,
                                                 NULL);
  
  printf ("Creating texture with size\n");
  priv->texture_id = cogl_texture_new_with_size (200,200,0, FALSE,
						 COGL_PIXEL_FORMAT_RGB_888);
  
  if (priv->texture_id == COGL_INVALID_HANDLE)
    printf ("Failed creating texture with size!\n");
  
  printf ("Creating offscreen\n");
  priv->offscreen_id = cogl_offscreen_new_to_texture (priv->texture_id);
  
  if (priv->offscreen_id == COGL_INVALID_HANDLE)
    printf ("Failed creating offscreen to texture!\n");
}

static void
test_coglbox_class_init (TestCoglboxClass *klass)
{
  GObjectClass      *gobject_class = G_OBJECT_CLASS (klass);
  ClutterActorClass *actor_class   = CLUTTER_ACTOR_CLASS (klass);

  gobject_class->finalize     = test_coglbox_finalize;
  gobject_class->dispose      = test_coglbox_dispose;  
  actor_class->paint          = test_coglbox_paint;
  
  g_type_class_add_private (gobject_class, sizeof (TestCoglboxPrivate));
}

ClutterActor*
test_coglbox_new (void)
{
  return g_object_new (TEST_TYPE_COGLBOX, NULL);
}

int
main (int argc, char *argv[])
{
  ClutterActor     *stage;
  ClutterActor     *coglbox;
  
  clutter_init(&argc, &argv);
  
  /* Stage */
  stage = clutter_stage_get_default ();
  clutter_actor_set_size (stage, 400, 400);
  clutter_stage_set_title (CLUTTER_STAGE (stage), "Cogl Test");
  
  /* Cogl Box */
  coglbox = test_coglbox_new ();
  clutter_container_add_actor (CLUTTER_CONTAINER (stage), coglbox);
  
  clutter_actor_show_all (stage);
  
  clutter_main ();
  
  return 0;
}