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

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2010,2011 Intel Corporation.
* 2011 Giovanni Campagna <scampa.giovanni@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
* Authors:
* Matthew Allum
* Emmanuele Bassi
* Robert Bragg
* Neil Roberts
*/
#include "config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include "clutter-backend-eglnative.h"
/* This is a Cogl based backend */
#include "cogl/clutter-stage-cogl.h"
#ifdef HAVE_EVDEV
#include "clutter-device-manager-evdev.h"
#endif
#ifdef HAVE_TSLIB
#include "clutter-event-tslib.h"
#endif
#include "clutter-debug.h"
#include "clutter-private.h"
#include "clutter-main.h"
#include "clutter-stage-private.h"
#ifdef COGL_HAS_EGL_SUPPORT
#include "clutter-egl.h"
#endif
#ifdef CLUTTER_EGL_BACKEND_CEX100
#include "clutter-cex100.h"
#endif
#ifdef CLUTTER_EGL_BACKEND_CEX100
static gdl_plane_id_t gdl_plane = GDL_PLANE_ID_UPP_C;
static guint gdl_n_buffers = CLUTTER_CEX100_TRIPLE_BUFFERING;
#endif
#define clutter_backend_egl_native_get_type _clutter_backend_egl_native_get_type
G_DEFINE_TYPE (ClutterBackendEglNative, clutter_backend_egl_native, CLUTTER_TYPE_BACKEND_COGL);
static ClutterDeviceManager *
clutter_backend_egl_native_get_device_manager (ClutterBackend *backend)
{
ClutterBackendEglNative *backend_egl_native = CLUTTER_BACKEND_EGL_NATIVE (backend);
if (G_UNLIKELY (backend_egl_native->device_manager == NULL))
{
#ifdef HAVE_EVDEV
backend_egl_native->device_manager =
g_object_new (CLUTTER_TYPE_DEVICE_MANAGER_EVDEV,
"backend", backend_egl_native,
NULL);
#endif
}
return backend_egl_native->device_manager;
}
static void
clutter_backend_egl_native_init_events (ClutterBackend *backend)
{
const char *input_backend = NULL;
input_backend = g_getenv ("CLUTTER_INPUT_BACKEND");
#ifdef HAVE_EVDEV
if (input_backend != NULL &&
strcmp (input_backend, CLUTTER_EVDEV_INPUT_BACKEND) == 0)
_clutter_events_evdev_init (CLUTTER_BACKEND (backend));
else
#endif
#ifdef HAVE_TSLIB
if (input_backend != NULL &&
strcmp (input_backend, CLUTTER_TSLIB_INPUT_BACKEND) == 0)
_clutter_events_tslib_init (CLUTTER_BACKEND (backend));
else
#endif
if (input_backend != NULL)
g_error ("Unrecognized input backend '%s'", input_backend);
else
g_error ("Unknown input backend");
}
static void
clutter_backend_egl_native_dispose (GObject *gobject)
{
ClutterBackendEglNative *backend_egl_native = CLUTTER_BACKEND_EGL_NATIVE (gobject);
if (backend_egl_native->event_timer != NULL)
{
g_timer_destroy (backend_egl_native->event_timer);
backend_egl_native->event_timer = NULL;
}
#ifdef HAVE_TSLIB
_clutter_events_tslib_uninit (CLUTTER_BACKEND (gobject));
#endif
#ifdef HAVE_EVDEV
_clutter_events_evdev_uninit (CLUTTER_BACKEND (gobject));
if (backend_egl_native->device_manager != NULL)
{
g_object_unref (backend_egl_native->device_manager);
backend_egl_native->device_manager = NULL;
}
#endif
G_OBJECT_CLASS (clutter_backend_egl_native_parent_class)->dispose (gobject);
}
static ClutterStageWindow *
clutter_backend_egl_native_create_stage (ClutterBackend *backend,
ClutterStage *wrapper,
GError **error)
{
ClutterBackendEglNative *backend_egl_native = CLUTTER_BACKEND_EGL_NATIVE (backend);
ClutterStageWindow *stage;
if (G_UNLIKELY (backend_egl_native->stage != NULL))
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"The EglNative backend does not support multiple "
"onscreen windows");
return backend_egl_native->stage;
}
stage = g_object_new (CLUTTER_TYPE_STAGE_COGL,
"backend", backend,
"wrapper", wrapper,
NULL);
backend_egl_native->stage = stage;
return stage;
}
static gboolean
clutter_backend_egl_native_create_context (ClutterBackend *backend,
GError **error)
{
CoglSwapChain *swap_chain = NULL;
CoglOnscreenTemplate *onscreen_template = NULL;
if (backend->cogl_context != NULL)
return TRUE;
backend->cogl_renderer = cogl_renderer_new ();
if (!cogl_renderer_connect (backend->cogl_renderer, error))
goto error;
swap_chain = cogl_swap_chain_new ();
#if defined(CLUTTER_EGL_BACKEND_CEX100) && defined(COGL_HAS_GDL_SUPPORT)
cogl_swap_chain_set_length (swap_chain, gdl_n_buffers);
#endif
onscreen_template = cogl_onscreen_template_new (swap_chain);
cogl_object_unref (swap_chain);
/* XXX: I have some doubts that this is a good design.
* Conceptually should we be able to check an onscreen_template
* without more details about the CoglDisplay configuration?
*/
if (!cogl_renderer_check_onscreen_template (backend->cogl_renderer,
onscreen_template,
error))
goto error;
backend->cogl_display = cogl_display_new (backend->cogl_renderer,
onscreen_template);
#if defined(CLUTTER_EGL_BACKEND_CEX100) && defined(COGL_HAS_GDL_SUPPORT)
cogl_gdl_display_set_plane (backend->cogl_display, gdl_plane);
#endif /* CLUTTER_EGL_BACKEND_CEX100 */
cogl_object_unref (backend->cogl_renderer);
cogl_object_unref (onscreen_template);
if (!cogl_display_setup (backend->cogl_display, error))
goto error;
backend->cogl_context = cogl_context_new (backend->cogl_display, error);
if (backend->cogl_context == NULL)
goto error;
return TRUE;
error:
if (backend->cogl_display != NULL)
{
cogl_object_unref (backend->cogl_display);
backend->cogl_display = NULL;
}
if (onscreen_template != NULL)
cogl_object_unref (onscreen_template);
if (swap_chain != NULL)
cogl_object_unref (swap_chain);
if (backend->cogl_renderer != NULL)
{
cogl_object_unref (backend->cogl_renderer);
backend->cogl_renderer = NULL;
}
return FALSE;
}
static void
clutter_backend_egl_native_class_init (ClutterBackendEglNativeClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
gobject_class->dispose = clutter_backend_egl_native_dispose;
backend_class->get_device_manager = clutter_backend_egl_native_get_device_manager;
backend_class->init_events = clutter_backend_egl_native_init_events;
backend_class->create_stage = clutter_backend_egl_native_create_stage;
backend_class->create_context = clutter_backend_egl_native_create_context;
}
static void
clutter_backend_egl_native_init (ClutterBackendEglNative *backend_egl_native)
{
backend_egl_native->event_timer = g_timer_new ();
}
#ifdef CLUTTER_EGL_BACKEND_CEX100
/**
* clutter_cex100_set_plane:
* @plane: FIXME
*
* FIXME
*
* Since:
*/
void
clutter_cex100_set_plane (gdl_plane_id_t plane)
{
g_return_if_fail (plane >= GDL_PLANE_ID_UPP_A && plane <= GDL_PLANE_ID_UPP_E);
gdl_plane = plane;
}
#endif
#ifdef CLUTTER_EGL_BACKEND_CEX100
/**
* clutter_cex100_set_plane:
* @mode: FIXME
*
* FIXME
*
* Since:
*/
void
clutter_cex100_set_buffering_mode (ClutterCex100BufferingMode mode)
{
g_return_if_fail (mode == CLUTTER_CEX100_DOUBLE_BUFFERING ||
mode == CLUTTER_CEX100_TRIPLE_BUFFERING);
gdl_n_buffers = mode;
}
#endif
/**
* clutter_eglx_display:
*
* Retrieves the EGL display used by Clutter.
*
* Return value: the EGL display, or 0
*
* Since: 0.6
*
* Deprecated: 1.6: Use clutter_egl_get_egl_display() instead.
*/
EGLDisplay
clutter_eglx_display (void)
{
return clutter_egl_get_egl_display ();
}
/**
* clutter_egl_display:
*
* Retrieves the EGL display used by Clutter.
*
* Return value: the EGL display used by Clutter, or 0
*
* Since: 0.6
*
* Deprecated: 1.6: Use clutter_egl_get_egl_display() instead.
*/
EGLDisplay
clutter_egl_display (void)
{
return clutter_egl_get_egl_display ();
}
/**
* clutter_egl_get_egl_display:
*
* Retrieves the EGL display used by Clutter, if it supports the
* EGL windowing system and if it is running using an EGL backend.
*
* Return value: the EGL display used by Clutter, or 0
*
* Since: 1.6
*/
EGLDisplay
clutter_egl_get_egl_display (void)
{
ClutterBackend *backend;
if (!_clutter_context_is_initialized ())
{
g_critical ("The Clutter backend has not been initialized yet");
return 0;
}
backend = clutter_get_default_backend ();
if (!CLUTTER_IS_BACKEND_EGL_NATIVE (backend))
{
g_critical ("The Clutter backend is not an EGL backend");
return 0;
}
#if COGL_HAS_EGL_SUPPORT
return cogl_egl_context_get_egl_display (backend->cogl_context);
#else
return 0;
#endif
}