mutter/clutter/cex100/clutter-backend-cex100.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
#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
#include "clutter-cex100.h"
static gdl_plane_id_t gdl_plane = GDL_PLANE_ID_UPP_C;
static guint gdl_n_buffers = CLUTTER_CEX100_TRIPLE_BUFFERING;
#define clutter_backend_cex100_get_type _clutter_backend_cex100_get_type
G_DEFINE_TYPE (ClutterBackendCex100, clutter_backend_cex100, CLUTTER_TYPE_BACKEND);
static void
clutter_backend_cex100_dispose (GObject *gobject)
{
ClutterBackendCex100 *backend_cex100 = CLUTTER_BACKEND_CEX100 (gobject);
if (backend_cex100->event_timer != NULL)
{
g_timer_destroy (backend_cex100->event_timer);
backend_cex100->event_timer = NULL;
}
G_OBJECT_CLASS (clutter_backend_cex100_parent_class)->dispose (gobject);
}
static CoglDisplay *
clutter_backend_cex100_get_display (ClutterBackend *backend,
CoglRenderer *renderer,
CoglSwapChain *swap_chain,
GError **error)
{
CoglOnscreenTemplate *onscreen_template = NULL;
CoglDisplay *display;
swap_chain = cogl_swap_chain_new ();
#if defined(COGL_HAS_GDL_SUPPORT)
cogl_swap_chain_set_length (swap_chain, gdl_n_buffers);
#endif
onscreen_template = cogl_onscreen_template_new (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 (renderer,
onscreen_template,
error))
goto error;
display = cogl_display_new (renderer, onscreen_template);
#if defined(COGL_HAS_GDL_SUPPORT)
cogl_gdl_display_set_plane (cogl_display, gdl_plane);
#endif
return display;
}
static void
clutter_backend_cex100_class_init (ClutterBackendCex100Class *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
gobject_class->dispose = clutter_backend_cex100_dispose;
backend_class->stage_window_type = CLUTTER_TYPE_STAGE_COGL;
backend_class->get_display = clutter_backend_cex100_get_display;
}
static void
clutter_backend_cex100_init (ClutterBackendCex100 *backend_cex100)
{
backend_cex100->event_timer = g_timer_new ();
}
/**
* clutter_cex100_set_plane:
* @plane: a GDL plane
*
* Intel CE3100 and CE4100 have several planes (frame buffers) and a
* hardware blender to blend the planes togeteher and produce the final
* image.
*
* clutter_cex100_set_plane() let's you configure the GDL plane where
* the stage will be drawn. By default Clutter will pick UPP_C
* (GDL_PLANE_ID_UPP_C).
*
* <note>This function has to be called before clutter_init()</note>
*
* Since: 1.6
*/
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;
}
/**
* clutter_cex100_set_buffering_mode:
* @mode: a #ClutterCex100BufferingMode
*
* Configure the buffering mode of the underlying GDL plane. The GDL
* surface used by Clutter to draw can be backed up by either one or two
* back buffers thus being double or triple buffered, respectively.
*
* Clutter defaults to %CLUTTER_CEX100_TRIPLE_BUFFERING.
*
* <note>This function has to be called before clutter_init()</note>
*
* Since: 1.6
*/
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;
}
/**
* clutter_cex100_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: 1.10
*/
EGLDisplay
clutter_cex100_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_CEX100 (backend))
{
g_critical ("The Clutter backend is not a CEX100 backend");
return 0;
}
#if COGL_HAS_EGL_SUPPORT
return cogl_egl_context_get_egl_display (backend->cogl_context);
#else
return 0;
#endif
}