mutter/clutter/eglnative/clutter-backend-egl.c

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#include "config.h"
#include "clutter-backend-egl.h"
#include "clutter-stage-egl.h"
#include "../clutter-private.h"
#include "../clutter-main.h"
#include "../clutter-debug.h"
static ClutterBackendEGL *backend_singleton = NULL;
G_DEFINE_TYPE (ClutterBackendEGL, clutter_backend_egl, CLUTTER_TYPE_BACKEND);
static gboolean
clutter_backend_egl_pre_parse (ClutterBackend *backend,
GError **error)
{
return TRUE;
}
static gboolean
clutter_backend_egl_post_parse (ClutterBackend *backend,
GError **error)
{
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ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL(backend);
EGLBoolean status;
backend_egl->edpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
status = eglInitialize(backend_egl->edpy,
&backend_egl->egl_version_major,
&backend_egl->egl_version_minor);
if (status != EGL_TRUE)
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Unable to Initialize EGL");
return FALSE;
}
CLUTTER_NOTE (BACKEND, "EGL Reports version %i.%i",
backend_egl->egl_version_major,
backend_egl->egl_version_minor);
return TRUE;
}
static gboolean
clutter_backend_egl_init_stage (ClutterBackend *backend,
GError **error)
{
ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (backend);
if (!backend_egl->stage)
{
ClutterActor *stage;
stage = g_object_new (CLUTTER_TYPE_STAGE_EGL, NULL);
g_object_set_data (G_OBJECT (stage), "clutter-backend", backend);
backend_egl->stage = g_object_ref_sink (stage);
}
clutter_actor_realize (backend_egl->stage);
if (!CLUTTER_ACTOR_IS_REALIZED (backend_egl->stage))
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_INTERNAL,
"Unable to realize the main stage");
return FALSE;
}
return TRUE;
}
static void
clutter_backend_egl_init_events (ClutterBackend *backend)
{
_clutter_events_init (backend);
}
static const GOptionEntry entries[] =
{
{ NULL }
};
static void
clutter_backend_egl_redraw (ClutterBackend *backend)
{
ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (backend);
ClutterStageEGL *stage_egl;
stage_egl = CLUTTER_STAGE_EGL(backend_egl->stage);
clutter_actor_paint (CLUTTER_ACTOR(stage_egl));
/* Why this paint is done in backend as likely GL windowing system
* specific calls, like swapping buffers.
*/
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/* clutter_feature_wait_for_vblank (); */
eglSwapBuffers (backend_egl->edpy, stage_egl->egl_surface);
}
static ClutterActor *
clutter_backend_egl_get_stage (ClutterBackend *backend)
{
ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (backend);
return backend_egl->stage;
}
static void
clutter_backend_egl_finalize (GObject *gobject)
{
if (backend_singleton)
backend_singleton = NULL;
G_OBJECT_CLASS (clutter_backend_egl_parent_class)->finalize (gobject);
}
static void
clutter_backend_egl_dispose (GObject *gobject)
{
ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (gobject);
_clutter_events_uninit (CLUTTER_BACKEND (backend_egl));
if (backend_egl->stage)
{
clutter_actor_destroy (backend_egl->stage);
backend_egl->stage = NULL;
}
G_OBJECT_CLASS (clutter_backend_egl_parent_class)->dispose (gobject);
}
static GObject *
clutter_backend_egl_constructor (GType gtype,
guint n_params,
GObjectConstructParam *params)
{
GObjectClass *parent_class;
GObject *retval;
if (!backend_singleton)
{
parent_class = G_OBJECT_CLASS (clutter_backend_egl_parent_class);
retval = parent_class->constructor (gtype, n_params, params);
backend_singleton = CLUTTER_BACKEND_EGL (retval);
return retval;
}
g_warning ("Attempting to create a new backend object. This should "
"never happen, so we return the singleton instance.");
return g_object_ref (backend_singleton);
}
static void
clutter_backend_egl_class_init (ClutterBackendEGLClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
gobject_class->constructor = clutter_backend_egl_constructor;
gobject_class->dispose = clutter_backend_egl_dispose;
gobject_class->finalize = clutter_backend_egl_finalize;
backend_class->pre_parse = clutter_backend_egl_pre_parse;
backend_class->post_parse = clutter_backend_egl_post_parse;
backend_class->init_stage = clutter_backend_egl_init_stage;
backend_class->init_events = clutter_backend_egl_init_events;
backend_class->get_stage = clutter_backend_egl_get_stage;
backend_class->redraw = clutter_backend_egl_redraw;
}
static void
clutter_backend_egl_init (ClutterBackendEGL *backend_egl)
{
ClutterBackend *backend = CLUTTER_BACKEND (backend_egl);
clutter_backend_set_double_click_time (backend, 250);
clutter_backend_set_double_click_distance (backend, 5);
}
GType
_clutter_backend_impl_get_type (void)
{
return clutter_backend_egl_get_type ();
}
EGLDisplay
clutter_egl_display (void)
{
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return backend_singleton->edpy;
}