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mutter-performance-source/clutter/sdl/clutter-backend-sdl.c

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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-backend-sdl.h"
#include "clutter-stage-sdl.h"
#include "../clutter-private.h"
#include "../clutter-main.h"
#include "../clutter-debug.h"
static ClutterBackendSDL *backend_singleton = NULL;
G_DEFINE_TYPE (ClutterBackendSDL, clutter_backend_sdl, CLUTTER_TYPE_BACKEND);
static gboolean
clutter_backend_sdl_pre_parse (ClutterBackend *backend,
GError **error)
{
return TRUE;
}
static gboolean
clutter_backend_sdl_post_parse (ClutterBackend *backend,
GError **error)
{
int err;
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE) < 0)
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Unable to Initialize SDL");
return FALSE;
}
#if defined(WIN32)
err = SDL_GL_LoadLibrary("opengl32.dll");
#elif defined(__linux__) || defined(__FreeBSD__)
err = SDL_GL_LoadLibrary("libGL.so");
#else
#error Your platform is not supported
err = 1;
#endif
if (err != 0)
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
SDL_GetError());
return FALSE;
}
return TRUE;
}
static gboolean
clutter_backend_sdl_init_stage (ClutterBackend *backend,
GError **error)
{
ClutterBackendSDL *backend_sdl = CLUTTER_BACKEND_SDL (backend);
if (!backend_sdl->stage)
{
ClutterStageSDL *stage_sdl;
ClutterActor *stage;
stage = g_object_new (CLUTTER_TYPE_STAGE_SDL, NULL);
/* copy backend data into the stage */
stage_sdl = CLUTTER_STAGE_SDL (stage);
g_object_set_data (G_OBJECT (stage), "clutter-backend", backend);
backend_sdl->stage = g_object_ref_sink (stage);
}
clutter_actor_realize (backend_sdl->stage);
if (!CLUTTER_ACTOR_IS_REALIZED (backend_sdl->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_sdl_init_events (ClutterBackend *backend)
{
_clutter_events_init (backend);
}
static const GOptionEntry entries[] =
{
{ NULL }
};
static void
clutter_backend_sdl_add_options (ClutterBackend *backend,
GOptionGroup *group)
{
g_option_group_add_entries (group, entries);
}
static ClutterActor *
clutter_backend_sdl_get_stage (ClutterBackend *backend)
{
ClutterBackendSDL *backend_sdl = CLUTTER_BACKEND_SDL (backend);
return backend_sdl->stage;
}
static void
clutter_backend_sdl_redraw (ClutterBackend *backend)
{
ClutterBackendSDL *backend_sdl = CLUTTER_BACKEND_SDL (backend);
ClutterStageSDL *stage_sdl;
stage_sdl = CLUTTER_STAGE_SDL(backend_sdl->stage);
clutter_actor_paint (CLUTTER_ACTOR(stage_sdl));
SDL_GL_SwapBuffers();
}
static void
clutter_backend_sdl_finalize (GObject *gobject)
{
SDL_Quit();
if (backend_singleton)
backend_singleton = NULL;
G_OBJECT_CLASS (clutter_backend_sdl_parent_class)->finalize (gobject);
}
static void
clutter_backend_sdl_dispose (GObject *gobject)
{
ClutterBackendSDL *backend_sdl = CLUTTER_BACKEND_SDL (gobject);
_clutter_events_uninit (CLUTTER_BACKEND (backend_sdl));
if (backend_sdl->stage)
{
CLUTTER_UNSET_PRIVATE_FLAGS (backend_sdl->stage,
CLUTTER_ACTOR_IS_TOPLEVEL);
clutter_actor_destroy (backend_sdl->stage);
backend_sdl->stage = NULL;
}
G_OBJECT_CLASS (clutter_backend_sdl_parent_class)->dispose (gobject);
}
static GObject *
clutter_backend_sdl_constructor (GType gtype,
guint n_params,
GObjectConstructParam *params)
{
GObjectClass *parent_class;
GObject *retval;
if (!backend_singleton)
{
parent_class = G_OBJECT_CLASS (clutter_backend_sdl_parent_class);
retval = parent_class->constructor (gtype, n_params, params);
backend_singleton = CLUTTER_BACKEND_SDL (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 ClutterFeatureFlags
clutter_backend_sdl_get_features (ClutterBackend *backend)
{
return CLUTTER_FEATURE_STAGE_CURSOR;
}
static void
clutter_backend_sdl_class_init (ClutterBackendSDLClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
gobject_class->constructor = clutter_backend_sdl_constructor;
gobject_class->dispose = clutter_backend_sdl_dispose;
gobject_class->finalize = clutter_backend_sdl_finalize;
backend_class->pre_parse = clutter_backend_sdl_pre_parse;
backend_class->post_parse = clutter_backend_sdl_post_parse;
backend_class->init_stage = clutter_backend_sdl_init_stage;
backend_class->init_events = clutter_backend_sdl_init_events;
backend_class->get_stage = clutter_backend_sdl_get_stage;
backend_class->add_options = clutter_backend_sdl_add_options;
backend_class->redraw = clutter_backend_sdl_redraw;
backend_class->get_features = clutter_backend_sdl_get_features;
}
static void
clutter_backend_sdl_init (ClutterBackendSDL *backend_sdl)
{
ClutterBackend *backend = CLUTTER_BACKEND (backend_sdl);
clutter_backend_set_resolution (backend, 96.0);
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_sdl_get_type ();
}