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[692/906] window_x11: add XError trapping

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some functions in GLX can fail if the implementation does not support
certain features we ask for (i.e. GL 3) bringing down the entire
application
This commit is contained in:
Matthew Waters 2013-06-03 18:15:45 +10:00
parent 7f2770af7c
commit 3af4ce25ff
2 changed files with 59 additions and 18 deletions
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74
gst-libs/gst/gl/x11/gstglwindow_x11.c
View file

@ -45,6 +45,10 @@
#define gst_gl_window_x11_parent_class parent_class
G_DEFINE_ABSTRACT_TYPE (GstGLWindowX11, gst_gl_window_x11, GST_GL_TYPE_WINDOW);
/* X error trap */
static int TrappedErrorCode = 0;
static int (*old_error_handler) (Display *, XErrorEvent *);
enum
{
ARG_0,
@ -607,13 +611,13 @@ gst_gl_window_x11_run (GstGLWindow * window)
if (window_x11->running) {
#if SIZEOF_VOID_P == 8
GstGLWindowCB custom_cb =
(GstGLWindowCB) (((event.xclient.data.
l[0] & 0xffffffff) << 32) | (event.xclient.data.
l[1] & 0xffffffff));
(GstGLWindowCB) (((event.xclient.
data.l[0] & 0xffffffff) << 32) | (event.xclient.
data.l[1] & 0xffffffff));
gpointer custom_data =
(gpointer) (((event.xclient.data.
l[2] & 0xffffffff) << 32) | (event.xclient.data.
l[3] & 0xffffffff));
(gpointer) (((event.xclient.
data.l[2] & 0xffffffff) << 32) | (event.xclient.
data.l[3] & 0xffffffff));
#else
GstGLWindowCB custom_cb = (GstGLWindowCB) event.xclient.data.l[0];
gpointer custom_data = (gpointer) event.xclient.data.l[1];
@ -642,13 +646,13 @@ gst_gl_window_x11_run (GstGLWindow * window)
&& event.xclient.message_type == wm_quit_loop) {
#if SIZEOF_VOID_P == 8
GstGLWindowCB destroy_cb =
(GstGLWindowCB) (((event.xclient.data.
l[0] & 0xffffffff) << 32) | (event.xclient.data.
l[1] & 0xffffffff));
(GstGLWindowCB) (((event.xclient.
data.l[0] & 0xffffffff) << 32) | (event.xclient.
data.l[1] & 0xffffffff));
gpointer destroy_data =
(gpointer) (((event.xclient.data.
l[2] & 0xffffffff) << 32) | (event.xclient.data.
l[3] & 0xffffffff));
(gpointer) (((event.xclient.
data.l[2] & 0xffffffff) << 32) | (event.xclient.
data.l[3] & 0xffffffff));
#else
GstGLWindowCB destroy_cb = (GstGLWindowCB) event.xclient.data.l[0];
gpointer destroy_data = (gpointer) event.xclient.data.l[1];
@ -666,13 +670,13 @@ gst_gl_window_x11_run (GstGLWindow * window)
&pending_event)) {
#if SIZEOF_VOID_P == 8
GstGLWindowCB custom_cb =
(GstGLWindowCB) (((event.xclient.data.
l[0] & 0xffffffff) << 32) | (event.xclient.data.
l[1] & 0xffffffff));
(GstGLWindowCB) (((event.xclient.
data.l[0] & 0xffffffff) << 32) | (event.xclient.
data.l[1] & 0xffffffff));
gpointer custom_data =
(gpointer) (((event.xclient.data.
l[2] & 0xffffffff) << 32) | (event.xclient.data.
l[3] & 0xffffffff));
(gpointer) (((event.xclient.
data.l[2] & 0xffffffff) << 32) | (event.xclient.
data.l[3] & 0xffffffff));
#else
GstGLWindowCB custom_cb = (GstGLWindowCB) event.xclient.data.l[0];
gpointer custom_data = (gpointer) event.xclient.data.l[1];
@ -826,3 +830,37 @@ gst_gl_window_x11_send_message (GstGLWindow * window, GstGLWindowCB callback,
GST_GL_WINDOW_GET_LOCK (window));
}
}
static int
error_handler (Display * xdpy, XErrorEvent * error)
{
TrappedErrorCode = error->error_code;
return 0;
}
/**
* gst_gl_window_x11_trap_x_errors:
*
* Traps every X error until gst_gl_window_x11_untrap_x_errors() is called.
*/
void
gst_gl_window_x11_trap_x_errors (void)
{
TrappedErrorCode = 0;
old_error_handler = XSetErrorHandler (error_handler);
}
/**
* gst_gl_window_x11_untrap_x_errors:
*
* Removes the X error trap and returns the current status.
*
* Return value: the trapped error code, or 0 for success
*/
gint
gst_gl_window_x11_untrap_x_errors (void)
{
XSetErrorHandler (old_error_handler);
return TrappedErrorCode;
}

3
gst-libs/gst/gl/x11/gstglwindow_x11.h
View file

@ -97,6 +97,9 @@ GType gst_gl_window_x11_get_type (void);
GstGLWindowX11 * gst_gl_window_x11_new (void);
void gst_gl_window_x11_trap_x_errors (void);
gint gst_gl_window_x11_untrap_x_errors (void);
G_END_DECLS
#endif /* __GST_GL_WINDOW_X11_H__ */