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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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161 lines
4.3 KiB
C
161 lines
4.3 KiB
C
/*
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* gstvaapiutils_x11.c - X11 utilties
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*
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* Copyright (C) 2010-2011 Splitted-Desktop Systems
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* Author: Gwenole Beauchesne <gwenole.beauchesne@splitted-desktop.com>
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* Copyright (C) 2011-2013 Intel Corporation
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* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#include "sysdeps.h"
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#include <glib.h>
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#include <X11/Xutil.h>
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#include "gstvaapiutils_x11.h"
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// X error trap
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static int x11_error_code = 0;
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static int (*old_error_handler) (Display *, XErrorEvent *);
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static int
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error_handler (Display * dpy, XErrorEvent * error)
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{
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x11_error_code = error->error_code;
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return 0;
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}
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void
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x11_trap_errors (void)
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{
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x11_error_code = 0;
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old_error_handler = XSetErrorHandler (error_handler);
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}
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int
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x11_untrap_errors (void)
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{
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XSetErrorHandler (old_error_handler);
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return x11_error_code;
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}
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// X window management
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static const int x11_event_mask = (KeyPressMask | KeyReleaseMask
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| ButtonPressMask | ButtonReleaseMask | PointerMotionMask
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| EnterWindowMask | ExposureMask | StructureNotifyMask);
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/**
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* x11_create_window:
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* @dpy: an X11 #Display
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* @w: the requested width, in pixels
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* @h: the requested height, in pixels
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* @vid: the requested visual id
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* @cmap: the requested colormap
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*
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* Creates a border-less window with the specified dimensions. If @vid
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* is zero, the default visual for @display will be used. If @cmap is
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* %None, no specific colormap will be bound to the window. Also note
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* the default background color is black.
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*
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* Return value: the newly created X Window.
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*/
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Window
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x11_create_window (Display * dpy, guint w, guint h, guint vid, Colormap cmap)
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{
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Window rootwin, win;
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int screen, depth;
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XSetWindowAttributes xswa;
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unsigned long xswa_mask;
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XWindowAttributes wattr;
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unsigned long black_pixel;
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XVisualInfo visualInfo, *vi;
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int num_visuals;
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screen = DefaultScreen (dpy);
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rootwin = RootWindow (dpy, screen);
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black_pixel = BlackPixel (dpy, screen);
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XGetWindowAttributes (dpy, rootwin, &wattr);
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depth = wattr.depth;
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if (depth != 15 && depth != 16 && depth != 24 && depth != 30 && depth != 32)
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depth = 24;
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xswa_mask = CWBorderPixel | CWBackPixel;
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xswa.border_pixel = black_pixel;
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xswa.background_pixel = black_pixel;
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if (cmap) {
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xswa_mask |= CWColormap;
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xswa.colormap = cmap;
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}
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if (vid) {
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visualInfo.visualid = vid;
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vi = XGetVisualInfo (dpy, VisualIDMask, &visualInfo, &num_visuals);
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if (!vi || num_visuals < 1)
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goto error_create_visual;
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} else {
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vi = &visualInfo;
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XMatchVisualInfo (dpy, screen, depth, TrueColor, vi);
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}
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win = XCreateWindow (dpy, rootwin, 0, 0, w, h, 0, depth, InputOutput,
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vi->visual, xswa_mask, &xswa);
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if (vi != &visualInfo)
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XFree (vi);
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if (!win)
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goto error_create_window;
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XSelectInput (dpy, win, x11_event_mask);
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return win;
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/* ERRORS */
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error_create_visual:
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GST_ERROR ("failed to create X visual (id:%zu)", (gsize) visualInfo.visualid);
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if (vi)
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XFree (vi);
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return None;
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error_create_window:
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GST_ERROR ("failed to create X window of size %ux%u", w, h);
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return None;
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}
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gboolean
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x11_get_geometry (Display * dpy, Drawable drawable, gint * px, gint * py,
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guint * pwidth, guint * pheight, guint * pdepth)
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{
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Window rootwin;
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int x, y;
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guint width, height, border_width, depth;
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x11_trap_errors ();
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XGetGeometry (dpy, drawable, &rootwin, &x, &y, &width, &height,
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&border_width, &depth);
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if (x11_untrap_errors ())
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return FALSE;
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if (px)
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*px = x;
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if (py)
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*py = y;
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if (pwidth)
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*pwidth = width;
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if (pheight)
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*pheight = height;
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if (pdepth)
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*pdepth = depth;
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return TRUE;
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}
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