gstreamer/gst-libs/gst/vaapi/gstvaapiutils_x11.c

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/*
* gstvaapiutils_x11.c - X11 utilties
*
* gstreamer-vaapi (C) 2010 Splitted-Desktop Systems
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <glib.h>
#include <X11/Xutil.h>
#include "gstvaapiutils_x11.h"
// X error trap
static int x11_error_code = 0;
static int (*old_error_handler)(Display *, XErrorEvent *);
static int error_handler(Display *dpy, XErrorEvent *error)
{
x11_error_code = error->error_code;
return 0;
}
void x11_trap_errors(void)
{
x11_error_code = 0;
old_error_handler = XSetErrorHandler(error_handler);
}
int x11_untrap_errors(void)
{
XSetErrorHandler(old_error_handler);
return x11_error_code;
}
// X window management
static const int x11_event_mask = (KeyPressMask |
KeyReleaseMask |
ButtonPressMask |
ButtonReleaseMask |
PointerMotionMask |
EnterWindowMask |
ExposureMask |
StructureNotifyMask);
Window
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x11_create_window(Display *display, guint width, guint height)
{
Window root_window, window;
int screen, depth;
Visual *vis;
XSetWindowAttributes xswa;
unsigned long xswa_mask;
XWindowAttributes wattr;
unsigned long black_pixel, white_pixel;
screen = DefaultScreen(display);
vis = DefaultVisual(display, screen);
root_window = RootWindow(display, screen);
black_pixel = BlackPixel(display, screen);
white_pixel = WhitePixel(display, screen);
XGetWindowAttributes(display, root_window, &wattr);
depth = wattr.depth;
if (depth != 15 && depth != 16 && depth != 24 && depth != 32)
depth = 24;
xswa_mask = CWBorderPixel | CWBackPixel;
xswa.border_pixel = black_pixel;
xswa.background_pixel = black_pixel;
window = XCreateWindow(
display,
root_window,
0, 0, width, height,
0,
depth,
InputOutput,
vis,
xswa_mask, &xswa
);
if (!window)
return None;
XSelectInput(display, window, x11_event_mask);
return window;
}
gboolean
x11_get_geometry(
Display *dpy,
Drawable drawable,
gint *px,
gint *py,
guint *pwidth,
guint *pheight
)
{
Window rootwin;
int x, y;
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guint width, height, border_width, depth;
x11_trap_errors();
XGetGeometry(
dpy,
drawable,
&rootwin,
&x, &y, &width, &height,
&border_width,
&depth
);
if (x11_untrap_errors())
return FALSE;
if (px) *px = x;
if (py) *py = y;
if (pwidth) *pwidth = width;
if (pheight) *pheight = height;
return TRUE;
}