gstreamer/gst-libs/gst/gl/win32/win32_message_source.c
Xavier Claessens e24bc348bd gl: win32: use a GMainContext to dispatch win32 messages
gst_gl_window_win32_send_message_async() could be called before the
internal window is created so we cannot use PostMessage there.

x11 and wayland backends both create a custom GSource for this,
so there is no reason to not do that for win32.

https://bugzilla.gnome.org/show_bug.cgi?id=749601
2015-05-21 14:33:52 -04:00

83 lines
2.1 KiB
C

/*
* GStreamer
* Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>
* Copyright (C) 2015 Collabora ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdint.h>
#include <stdlib.h>
#include "win32_message_source.h"
typedef struct _Win32MessageSource
{
GSource source;
GPollFD pfd;
GstGLWindowWin32 *window;
} Win32MessageSource;
static gboolean
win32_message_source_check (GSource * base)
{
MSG msg;
return PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE);
}
static gboolean
win32_message_source_dispatch (GSource * base, GSourceFunc callback,
gpointer user_data)
{
Win32MessageSource *source = (Win32MessageSource *) base;
Win32MessageSourceFunc func = (Win32MessageSourceFunc) callback;
MSG msg;
if (!PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
return G_SOURCE_CONTINUE;
if (func)
func (source->window, &msg, user_data);
return G_SOURCE_CONTINUE;
}
static GSourceFuncs win32_message_source_funcs = {
NULL,
win32_message_source_check,
win32_message_source_dispatch,
NULL
};
GSource *
win32_message_source_new (GstGLWindowWin32 * window_win32)
{
Win32MessageSource *source;
source = (Win32MessageSource *)
g_source_new (&win32_message_source_funcs, sizeof (Win32MessageSource));
source->window = window_win32;
source->pfd.fd = G_WIN32_MSG_HANDLE;
source->pfd.events = G_IO_IN;
g_source_add_poll (&source->source, &source->pfd);
return &source->source;
}