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eglnative: Add CLUTTER_FB_DEVICE

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Some EGL drivers for embedded devices require a specific framebuffer
device to be opened and passed to eglCreateWindowSurface(). Since it's
optional, we can provide an environment variabled called
CLUTTER_FB_DEVICE that can be used to specify the path of the device
to be opened.

http://bugzilla.openedhand.com/show_bug.cgi?id=1997
This commit is contained in:
Emmanuele Bassi 2010-03-01 11:38:41 +00:00
parent b4e9f40394
commit a2573ad2ad
2 changed files with 57 additions and 5 deletions
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49
clutter/eglnative/clutter-backend-egl.c
View File

@ -2,14 +2,21 @@
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.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;
static const gchar *clutter_fb_device = NULL;
G_DEFINE_TYPE (ClutterBackendEGL, clutter_backend_egl, CLUTTER_TYPE_BACKEND);
static void
@ -23,6 +30,12 @@ static gboolean
clutter_backend_egl_pre_parse (ClutterBackend *backend,
GError **error)
{
const gchar *env_string;
env_string = g_getenv ("CLUTTER_FB_DEVICE");
if (env_string != NULL && env_string[0] != '\0')
clutter_fb_device = g_strdup (env_string);
return TRUE;
}
@ -130,11 +143,39 @@ clutter_backend_egl_create_context (ClutterBackend *backend,
backend_egl->egl_context = NULL;
}
if (clutter_fb_device != NULL)
{
int fd = open (clutter_fb_device, O_RDWR);
if (fd < 0)
{
int errno_save = errno;
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Unable to open the framebuffer device '%s': %s",
clutter_fb_device,
g_strerror (errno_save));
return FALSE;
}
else
backend_egl->fb_device_id = fd;
backend_egl->egl_surface =
eglCreateWindowSurface (backend_egl->edpy,
configs[0],
(NativeWindowType) backend_egl->fb_device_id,
NULL);
}
else
{
backend_egl->egl_surface =
eglCreateWindowSurface (backend_egl->edpy,
configs[0],
NULL,
NULL);
}
if (backend_egl->egl_surface == EGL_NO_SURFACE)
{
@ -295,6 +336,12 @@ clutter_backend_egl_dispose (GObject *gobject)
backend_egl->egl_surface = EGL_NO_SURFACE;
}
if (backend_egl->fb_device_id != -1)
{
close (backend_egl->fb_device_id);
backend_egl->fb_device_id = -1;
}
if (backend_egl->egl_context != NULL)
{
eglDestroyContext (backend_egl->edpy, backend_egl->egl_context);
@ -394,6 +441,8 @@ clutter_backend_egl_init (ClutterBackendEGL *backend_egl)
clutter_backend_set_double_click_distance (backend, 5);
backend_egl->event_timer = g_timer_new ();
backend_egl->fb_device_id = -1;
}
GType

3
clutter/eglnative/clutter-backend-egl.h
View File

@ -66,6 +66,9 @@ struct _ClutterBackendEGL
/* event timer */
GTimer *event_timer;
/* FB device */
gint fb_device_id;
/*< private >*/
};