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154 lines
4 KiB
C
154 lines
4 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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* Copyright (C) 2011 Intel Corporation
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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 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 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 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 |
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KeyReleaseMask |
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ButtonPressMask |
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ButtonReleaseMask |
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PointerMotionMask |
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EnterWindowMask |
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ExposureMask |
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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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* @vis: the request visual
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* @cmap: the request colormap
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*
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* Creates a border-less window with the specified dimensions. If @vis
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* is %NULL, 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, Visual *vis, 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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screen = DefaultScreen(dpy);
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rootwin = RootWindow(dpy, screen);
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black_pixel = BlackPixel(dpy, screen);
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if (!vis)
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vis = DefaultVisual(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 != 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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win = XCreateWindow(
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dpy,
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rootwin,
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0, 0, w, h,
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0,
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depth,
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InputOutput,
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vis,
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xswa_mask, &xswa
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);
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if (!win)
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return None;
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XSelectInput(dpy, win, x11_event_mask);
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return win;
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}
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gboolean
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x11_get_geometry(
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Display *dpy,
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Drawable drawable,
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gint *px,
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gint *py,
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guint *pwidth,
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guint *pheight
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)
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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(
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dpy,
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drawable,
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&rootwin,
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&x, &y, &width, &height,
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&border_width,
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&depth
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);
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if (x11_untrap_errors())
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return FALSE;
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if (px) *px = x;
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if (py) *py = y;
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if (pwidth) *pwidth = width;
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if (pheight) *pheight = height;
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return TRUE;
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}
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