mutter/tests/interactive/test-cogl-offscreen.c
Robert Bragg a5cdfdfd87 [cogl-offscreen] Cleans up the cogl offscreen API and adds documentation
There were several functions I believe no one is currently using that were
only implemented in the GL backend (cogl_offscreen_blit_region and
cogl_offscreen_blit) that have simply been removed so we have a chance to
think about design later with a real use case.

There was one nonsense function (cogl_offscreen_new_multisample) that
sounded exciting but in all cases it just returned COGL_INVALID_HANDLE
(though at least for GL it checked for multisampling support first!?)
it has also been removed.

The MASK draw buffer type has been removed. If we want to expose color
masking later then I think it at least would be nicer to have the mask be a
property that can be set on any draw buffer.

The cogl_draw_buffer and cogl_{push,pop}_draw_buffer function prototypes
have been moved up into cogl.h since they are for managing global Cogl state
and not for modifying or creating the actual offscreen buffers.

This also documents the API so for example desiphering the semantics of
cogl_offscreen_new_to_texture() should be a bit easier now.
2009-05-02 04:12:26 +01:00

208 lines
5.4 KiB
C

#include <config.h>
#include <glib.h>
#include <gmodule.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);
};
static 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);
gfloat texcoords[4] = { 0, 0, 1, 1 };
CoglHandle material;
priv = TEST_COGLBOX_GET_PRIVATE (self);
cogl_set_source_color4ub (0x66, 0x66, 0xdd, 0xff);
cogl_rectangle (0, 0, 400, 400);
cogl_set_source_texture (priv->texhand_id);
cogl_rectangle_with_texture_coords (0, 0,
400, 400,
0, 0,
6, 6);
cogl_set_draw_buffer (COGL_OFFSCREEN_BUFFER, priv->offscreen_id);
cogl_set_source_color4ub (0xff, 0, 0, 0xff);
cogl_rectangle (20, 20, 20 + 100, 20 + 100);
cogl_set_source_color4ub (0, 0xff, 0, 0xff);
cogl_rectangle (80, 80, 80 + 100, 80 + 100);
cogl_set_draw_buffer (COGL_WINDOW_BUFFER, 0);
material = cogl_material_new ();
cogl_material_set_color4ub (material, 0xff, 0xff, 0xff, 0x88);
cogl_material_set_layer (material, 0, priv->texture_id);
cogl_set_source (material);
cogl_rectangle_with_texture_coords (100, 100,
300, 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_handle_unref (priv->texture_id);
cogl_handle_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,
COGL_TEXTURE_NONE,
COGL_PIXEL_FORMAT_ANY,
NULL);
printf ("Creating texture with size\n");
priv->texture_id = cogl_texture_new_with_size (200, 200, 0,
COGL_TEXTURE_NONE,
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));
}
static ClutterActor*
test_coglbox_new (void)
{
return g_object_new (TEST_TYPE_COGLBOX, NULL);
}
G_MODULE_EXPORT int
test_cogl_offscreen_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;
}