797 lines
18 KiB
C
797 lines
18 KiB
C
/*
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* Xephyr - A kdrive X server thats runs in a host X window.
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* Authored by Matthew Allum <mallum@o-hand.com>
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*
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* Copyright © 2004 Nokia
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Nokia not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Nokia makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* NOKIA DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL NOKIA BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "hostx.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h> /* for memset */
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#include <time.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <sys/time.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/Xatom.h>
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#include <X11/keysym.h>
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#include <X11/extensions/XShm.h>
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/*
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* All xlib calls go here, which gets built as its own .a .
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* Mixing kdrive and xlib headers causes all sorts of types
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* to get clobbered.
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*/
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struct EphyrHostXVars
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{
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char *server_dpy_name;
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Display *dpy;
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int screen;
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Visual *visual;
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Window win, winroot;
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Window win_pre_existing; /* Set via -parent option like xnest */
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GC gc;
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int depth;
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int server_depth;
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XImage *ximg;
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int win_width, win_height;
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Bool use_host_cursor;
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Bool use_fullscreen;
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Bool have_shm;
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long damage_debug_msec;
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unsigned char *fb_data; /* only used when host bpp != server bpp */
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unsigned long cmap[256];
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XShmSegmentInfo shminfo;
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};
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/* memset ( missing> ) instead of below */
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static EphyrHostXVars HostX = { "?", 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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static int HostXWantDamageDebug = 0;
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extern KeySym EphyrKeymap[];
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extern KeySym kdKeymap[];
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extern int kdMinScanCode;
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extern int kdMaxScanCode;
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extern int kdMinKeyCode;
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extern int kdMaxKeyCode;
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extern int kdKeymapWidth;
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extern int monitorResolution;
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static void
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hostx_set_fullscreen_hint(void);
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/* X Error traps */
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static int trapped_error_code = 0;
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static int (*old_error_handler) (Display *d, XErrorEvent *e);
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#define host_depth_matches_server() (HostX.depth == HostX.server_depth)
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static int
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error_handler(Display *display,
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XErrorEvent *error)
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{
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trapped_error_code = error->error_code;
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return 0;
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}
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static void
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hostx_errors_trap(void)
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{
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trapped_error_code = 0;
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old_error_handler = XSetErrorHandler(error_handler);
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}
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static int
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hostx_errors_untrap(void)
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{
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XSetErrorHandler(old_error_handler);
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return trapped_error_code;
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}
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int
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hostx_want_screen_size(int *width, int *height)
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{
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if (HostX.win_pre_existing != None
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|| HostX.use_fullscreen == True)
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{
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*width = HostX.win_width;
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*height = HostX.win_height;
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return 1;
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}
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return 0;
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}
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void
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hostx_set_display_name(char *name)
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{
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HostX.server_dpy_name = strdup(name);
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}
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void
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hostx_set_win_title(char *extra_text)
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{
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char buf[256];
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snprintf(buf, 256, "Xephyr on %s %s",
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HostX.server_dpy_name,
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(extra_text != NULL) ? extra_text : "");
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XStoreName(HostX.dpy, HostX.win, buf);
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}
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int
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hostx_want_host_cursor(void)
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{
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return HostX.use_host_cursor;
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}
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void
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hostx_use_host_cursor(void)
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{
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HostX.use_host_cursor = True;
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}
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int
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hostx_want_preexisting_window(void)
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{
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if (HostX.win_pre_existing)
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return 1;
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else
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return 0;
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}
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void
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hostx_use_fullscreen(void)
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{
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HostX.use_fullscreen = True;
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}
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int
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hostx_want_fullscreen(void)
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{
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return HostX.use_fullscreen;
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}
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static void
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hostx_set_fullscreen_hint(void)
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{
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Atom atom_WINDOW_STATE, atom_WINDOW_STATE_FULLSCREEN;
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atom_WINDOW_STATE
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= XInternAtom(HostX.dpy, "_NET_WM_STATE", False);
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atom_WINDOW_STATE_FULLSCREEN
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= XInternAtom(HostX.dpy, "_NET_WM_STATE_FULLSCREEN",False);
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XChangeProperty(HostX.dpy, HostX.win,
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atom_WINDOW_STATE, XA_ATOM, 32,
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PropModeReplace,
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(unsigned char *)&atom_WINDOW_STATE_FULLSCREEN, 1);
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}
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void
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hostx_use_preexisting_window(unsigned long win_id)
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{
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HostX.win_pre_existing = win_id;
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}
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static void
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hostx_toggle_damage_debug(void)
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{
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HostXWantDamageDebug ^= 1;
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}
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void
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hostx_handle_signal(int signum)
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{
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hostx_toggle_damage_debug();
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EPHYR_DBG("Signal caught. Damage Debug:%i\n", HostXWantDamageDebug);
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}
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int
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hostx_init(void)
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{
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XSetWindowAttributes attr;
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Cursor empty_cursor;
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Pixmap cursor_pxm;
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XColor col;
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attr.event_mask =
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ButtonPressMask
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|ButtonReleaseMask
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|PointerMotionMask
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|KeyPressMask
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|KeyReleaseMask
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|ExposureMask;
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EPHYR_DBG("mark");
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if ((HostX.dpy = XOpenDisplay(getenv("DISPLAY"))) == NULL)
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{
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fprintf(stderr, "\nXephyr cannot open host display. Is DISPLAY set?\n");
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exit(1);
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}
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HostX.screen = DefaultScreen(HostX.dpy);
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HostX.winroot = RootWindow(HostX.dpy, HostX.screen);
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HostX.gc = XCreateGC(HostX.dpy, HostX.winroot, 0, NULL);
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HostX.depth = DefaultDepth(HostX.dpy, HostX.screen);
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HostX.visual = DefaultVisual(HostX.dpy, HostX.screen);
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HostX.server_depth = HostX.depth;
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if (HostX.win_pre_existing != None)
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{
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Status result;
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XWindowAttributes prewin_attr;
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/* Get screen size from existing window */
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hostx_errors_trap();
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result = XGetWindowAttributes(HostX.dpy,
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HostX.win_pre_existing,
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&prewin_attr);
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if (hostx_errors_untrap() || !result)
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{
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fprintf(stderr, "\nXephyr -parent window' does not exist!\n");
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exit(1);
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}
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HostX.win_width = prewin_attr.width;
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HostX.win_height = prewin_attr.height;
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HostX.win = XCreateWindow(HostX.dpy,
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HostX.win_pre_existing,
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0,0,HostX.win_width,HostX.win_height,
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0,
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CopyFromParent,
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CopyFromParent,
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CopyFromParent,
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CWEventMask,
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&attr);
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}
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else
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{
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HostX.win = XCreateWindow(HostX.dpy,
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HostX.winroot,
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0,0,100,100, /* will resize */
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0,
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CopyFromParent,
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CopyFromParent,
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CopyFromParent,
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CWEventMask,
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&attr);
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hostx_set_win_title("( ctrl+shift grabs mouse and keyboard )");
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if (HostX.use_fullscreen)
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{
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HostX.win_width = DisplayWidth(HostX.dpy, HostX.screen);
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HostX.win_height = DisplayHeight(HostX.dpy, HostX.screen);
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hostx_set_fullscreen_hint();
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}
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}
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XParseColor(HostX.dpy, DefaultColormap(HostX.dpy,HostX.screen), "red", &col);
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XAllocColor(HostX.dpy, DefaultColormap(HostX.dpy, HostX.screen), &col);
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XSetForeground(HostX.dpy, HostX.gc, col.pixel);
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if (!hostx_want_host_cursor())
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{
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/* Ditch the cursor, we provide our 'own' */
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cursor_pxm = XCreatePixmap (HostX.dpy, HostX.winroot, 1, 1, 1);
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memset (&col, 0, sizeof (col));
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empty_cursor = XCreatePixmapCursor (HostX.dpy,
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cursor_pxm, cursor_pxm,
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&col, &col, 1, 1);
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XDefineCursor (HostX.dpy, HostX.win, empty_cursor);
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XFreePixmap (HostX.dpy, cursor_pxm);
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}
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HostX.ximg = NULL;
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/* Try to get share memory ximages for a little bit more speed */
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if (!XShmQueryExtension(HostX.dpy) || getenv("XEPHYR_NO_SHM"))
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{
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fprintf(stderr, "\nXephyr unable to use SHM XImages\n");
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HostX.have_shm = False;
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}
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else
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{
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/* Really really check we have shm - better way ?*/
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XShmSegmentInfo shminfo;
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HostX.have_shm = True;
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shminfo.shmid=shmget(IPC_PRIVATE, 1, IPC_CREAT|0777);
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shminfo.shmaddr=shmat(shminfo.shmid,0,0);
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shminfo.readOnly=True;
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hostx_errors_trap();
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XShmAttach(HostX.dpy, &shminfo);
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XSync(HostX.dpy, False);
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if (hostx_errors_untrap())
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{
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fprintf(stderr, "\nXephyr unable to use SHM XImages\n");
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HostX.have_shm = False;
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}
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shmdt(shminfo.shmaddr);
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shmctl(shminfo.shmid, IPC_RMID, 0);
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}
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XFlush(HostX.dpy);
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/* Setup the pause time between paints when debugging updates */
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HostX.damage_debug_msec = 20000; /* 1/50 th of a second */
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if (getenv("XEPHYR_PAUSE"))
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{
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HostX.damage_debug_msec = strtol(getenv("XEPHYR_PAUSE"), NULL, 0);
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EPHYR_DBG("pause is %li\n", HostX.damage_debug_msec);
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}
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return 1;
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}
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int
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hostx_get_depth (void)
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{
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return HostX.depth;
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}
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int
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hostx_get_server_depth (void)
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{
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return HostX.server_depth;
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}
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void
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hostx_set_server_depth(int depth)
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{
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HostX.server_depth = depth;
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}
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int
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hostx_get_bpp(void)
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{
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if (host_depth_matches_server())
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return HostX.visual->bits_per_rgb;
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else
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return HostX.server_depth; /* XXX correct ? */
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}
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void
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hostx_get_visual_masks (unsigned long *rmsk,
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unsigned long *gmsk,
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unsigned long *bmsk)
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{
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if (host_depth_matches_server())
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{
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*rmsk = HostX.visual->red_mask;
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*gmsk = HostX.visual->green_mask;
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*bmsk = HostX.visual->blue_mask;
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}
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else if (HostX.server_depth == 16)
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{
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/* Assume 16bpp 565 */
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*rmsk = 0xf800;
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*gmsk = 0x07e0;
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*bmsk = 0x001f;
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}
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else
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{
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*rmsk = 0x0;
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*gmsk = 0x0;
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*bmsk = 0x0;
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}
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}
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void
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hostx_set_cmap_entry(unsigned char idx,
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unsigned char r,
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unsigned char g,
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unsigned char b)
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{
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/* XXX Will likely break for 8 on 16, not sure if this is correct */
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HostX.cmap[idx] = (r << 16) | (g << 8) | (b);
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}
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void*
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hostx_screen_init (int width, int height)
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{
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int bitmap_pad;
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Bool shm_success = False;
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XSizeHints *size_hints;
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EPHYR_DBG("mark");
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if (HostX.ximg != NULL)
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{
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/* Free up the image data if previously used
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* i.ie called by server reset
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*/
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if (HostX.have_shm)
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{
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XShmDetach(HostX.dpy, &HostX.shminfo);
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XDestroyImage (HostX.ximg);
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shmdt(HostX.shminfo.shmaddr);
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shmctl(HostX.shminfo.shmid, IPC_RMID, 0);
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}
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else
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{
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if (HostX.ximg->data)
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{
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free(HostX.ximg->data);
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HostX.ximg->data = NULL;
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}
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XDestroyImage(HostX.ximg);
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}
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}
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if (HostX.have_shm)
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{
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HostX.ximg = XShmCreateImage(HostX.dpy, HostX.visual, HostX.depth,
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ZPixmap, NULL, &HostX.shminfo,
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width, height );
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HostX.shminfo.shmid = shmget(IPC_PRIVATE,
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HostX.ximg->bytes_per_line * height,
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IPC_CREAT|0777);
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HostX.shminfo.shmaddr = HostX.ximg->data = shmat(HostX.shminfo.shmid,
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0, 0);
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if (HostX.ximg->data == (char *)-1)
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{
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EPHYR_DBG("Can't attach SHM Segment, falling back to plain XImages");
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HostX.have_shm = False;
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XDestroyImage(HostX.ximg);
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shmctl(HostX.shminfo.shmid, IPC_RMID, 0);
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}
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else
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{
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EPHYR_DBG("SHM segment attached");
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HostX.shminfo.readOnly = False;
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XShmAttach(HostX.dpy, &HostX.shminfo);
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shm_success = True;
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}
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}
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if (!shm_success)
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{
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bitmap_pad = ( HostX.depth > 16 )? 32 : (( HostX.depth > 8 )? 16 : 8 );
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HostX.ximg = XCreateImage( HostX.dpy,
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HostX.visual,
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HostX.depth,
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ZPixmap, 0, 0,
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width,
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height,
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bitmap_pad,
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0);
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HostX.ximg->data = malloc( HostX.ximg->bytes_per_line * height );
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}
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XResizeWindow(HostX.dpy, HostX.win, width, height);
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/* Ask the WM to keep our size static */
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size_hints = XAllocSizeHints();
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size_hints->max_width = size_hints->min_width = width;
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size_hints->max_height = size_hints->min_height = height;
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size_hints->flags = PMinSize|PMaxSize;
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XSetWMNormalHints(HostX.dpy, HostX.win, size_hints);
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XFree(size_hints);
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XMapWindow(HostX.dpy, HostX.win);
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XSync(HostX.dpy, False);
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HostX.win_width = width;
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HostX.win_height = height;
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if (host_depth_matches_server())
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{
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EPHYR_DBG("Host matches server");
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return HostX.ximg->data;
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}
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else
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{
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EPHYR_DBG("server bpp %i", HostX.server_depth>>3);
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HostX.fb_data = malloc(width*height*(HostX.server_depth>>3));
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return HostX.fb_data;
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}
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}
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void
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hostx_paint_rect(int sx, int sy,
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int dx, int dy,
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int width, int height)
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{
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/*
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* Copy the image data updated by the shadow layer
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* on to the window
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*/
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|
|
if (HostXWantDamageDebug)
|
|
{
|
|
hostx_paint_debug_rect(dx, dy, width, height);
|
|
}
|
|
|
|
/*
|
|
* If the depth of the ephyr server is less than that of the host,
|
|
* the kdrive fb does not point to the ximage data but to a buffer
|
|
* ( fb_data ), we shift the various bits from this onto the XImage
|
|
* so they match the host.
|
|
*
|
|
* Note, This code is pretty new ( and simple ) so may break on
|
|
* endian issues, 32 bpp host etc.
|
|
* Not sure if 8bpp case is right either.
|
|
* ... and it will be slower than the matching depth case.
|
|
*/
|
|
|
|
if (!host_depth_matches_server())
|
|
{
|
|
int x,y,idx, bytes_per_pixel = (HostX.server_depth>>3);
|
|
unsigned char r,g,b;
|
|
unsigned long host_pixel;
|
|
|
|
for (y=sy; y<sy+height; y++)
|
|
for (x=sx; x<sx+width; x++)
|
|
{
|
|
idx = (HostX.win_width*y*bytes_per_pixel)+(x*bytes_per_pixel);
|
|
|
|
switch (HostX.server_depth)
|
|
{
|
|
case 16:
|
|
{
|
|
unsigned short pixel = *(unsigned short*)(HostX.fb_data+idx);
|
|
|
|
r = ((pixel & 0xf800) >> 8);
|
|
g = ((pixel & 0x07e0) >> 3);
|
|
b = ((pixel & 0x001f) << 3);
|
|
|
|
host_pixel = (r << 16) | (g << 8) | (b);
|
|
|
|
XPutPixel(HostX.ximg, x, y, host_pixel);
|
|
break;
|
|
}
|
|
case 8:
|
|
{
|
|
unsigned char pixel = *(unsigned char*)(HostX.fb_data+idx);
|
|
XPutPixel(HostX.ximg, x, y, HostX.cmap[pixel]);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (HostX.have_shm)
|
|
{
|
|
XShmPutImage(HostX.dpy, HostX.win, HostX.gc, HostX.ximg,
|
|
sx, sy, dx, dy, width, height, False);
|
|
}
|
|
else
|
|
{
|
|
XPutImage(HostX.dpy, HostX.win, HostX.gc, HostX.ximg,
|
|
sx, sy, dx, dy, width, height);
|
|
}
|
|
|
|
XSync(HostX.dpy, False);
|
|
}
|
|
|
|
void
|
|
hostx_paint_debug_rect(int x, int y,
|
|
int width, int height)
|
|
{
|
|
struct timespec tspec;
|
|
|
|
tspec.tv_sec = HostX.damage_debug_msec / (1000000);
|
|
tspec.tv_nsec = (HostX.damage_debug_msec % 1000000) * 1000;
|
|
|
|
EPHYR_DBG("msec: %li tv_sec %li, tv_msec %li",
|
|
HostX.damage_debug_msec, tspec.tv_sec, tspec.tv_nsec);
|
|
|
|
/* fprintf(stderr, "Xephyr updating: %i+%i %ix%i\n", x, y, width, height); */
|
|
|
|
XFillRectangle(HostX.dpy, HostX.win, HostX.gc, x, y, width,height);
|
|
XSync(HostX.dpy, False);
|
|
|
|
/* nanosleep seems to work better than usleep for me... */
|
|
nanosleep(&tspec, NULL);
|
|
}
|
|
|
|
void
|
|
hostx_load_keymap(void)
|
|
{
|
|
KeySym *keymap;
|
|
int mapWidth, min_keycode, max_keycode;
|
|
int i,j;
|
|
|
|
XDisplayKeycodes(HostX.dpy, &min_keycode, &max_keycode);
|
|
|
|
EPHYR_DBG("min: %d, max: %d", min_keycode, max_keycode);
|
|
|
|
keymap = XGetKeyboardMapping(HostX.dpy,
|
|
min_keycode,
|
|
max_keycode - min_keycode + 1,
|
|
&mapWidth);
|
|
|
|
/* Try and copy the hosts keymap into our keymap to avoid loads
|
|
* of messing around.
|
|
*
|
|
* kdrive cannot can have more than 4 keysyms per keycode
|
|
* so we only copy the first 4 ( xorg has 6 per keycode )
|
|
*/
|
|
|
|
for (i=0; i<(max_keycode - min_keycode+1); i++)
|
|
for (j=0; j<4; j++)
|
|
kdKeymap[ (i*4)+j ] = keymap[ (i*mapWidth) + j ];
|
|
|
|
/* old way
|
|
memcpy (kdKeymap, keymap,
|
|
(max_keycode - min_keycode + 1)*mapWidth*sizeof(KeySym));
|
|
*/
|
|
|
|
EPHYR_DBG("keymap width: %d", mapWidth);
|
|
|
|
/* all kdrive vars - see kkeymap.c */
|
|
|
|
kdMinScanCode = min_keycode;
|
|
kdMaxScanCode = max_keycode;
|
|
kdMinKeyCode = min_keycode;
|
|
kdMaxKeyCode = max_keycode;
|
|
kdKeymapWidth = (mapWidth > 4) ? 4 : mapWidth;
|
|
|
|
XFree(keymap);
|
|
}
|
|
|
|
int
|
|
hostx_get_event(EphyrHostXEvent *ev)
|
|
{
|
|
XEvent xev;
|
|
static Bool grabbed;
|
|
|
|
if (XPending(HostX.dpy))
|
|
{
|
|
XNextEvent(HostX.dpy, &xev);
|
|
|
|
switch (xev.type)
|
|
{
|
|
case Expose:
|
|
/* Not so great event compression, but works ok */
|
|
while (XCheckTypedWindowEvent(HostX.dpy, xev.xexpose.window,
|
|
Expose, &xev));
|
|
hostx_paint_rect(0, 0, 0, 0, HostX.win_width, HostX.win_height);
|
|
return 0;
|
|
|
|
case MotionNotify:
|
|
ev->type = EPHYR_EV_MOUSE_MOTION;
|
|
ev->data.mouse_motion.x = xev.xmotion.x;
|
|
ev->data.mouse_motion.y = xev.xmotion.y;
|
|
return 1;
|
|
|
|
case ButtonPress:
|
|
ev->type = EPHYR_EV_MOUSE_PRESS;
|
|
ev->key_state = xev.xkey.state;
|
|
/*
|
|
* This is a bit hacky. will break for button 5 ( defined as 0x10 )
|
|
* Check KD_BUTTON defines in kdrive.h
|
|
*/
|
|
ev->data.mouse_down.button_num = 1<<(xev.xbutton.button-1);
|
|
return 1;
|
|
|
|
case ButtonRelease:
|
|
ev->type = EPHYR_EV_MOUSE_RELEASE;
|
|
ev->key_state = xev.xkey.state;
|
|
ev->data.mouse_up.button_num = 1<<(xev.xbutton.button-1);
|
|
return 1;
|
|
|
|
case KeyPress:
|
|
{
|
|
ev->type = EPHYR_EV_KEY_PRESS;
|
|
ev->key_state = xev.xkey.state;
|
|
ev->data.key_down.scancode = xev.xkey.keycode;
|
|
return 1;
|
|
}
|
|
case KeyRelease:
|
|
|
|
if ((XKeycodeToKeysym(HostX.dpy,xev.xkey.keycode,0) == XK_Shift_L
|
|
|| XKeycodeToKeysym(HostX.dpy,xev.xkey.keycode,0) == XK_Shift_R)
|
|
&& (xev.xkey.state & ControlMask))
|
|
{
|
|
if (grabbed)
|
|
{
|
|
XUngrabKeyboard (HostX.dpy, CurrentTime);
|
|
XUngrabPointer (HostX.dpy, CurrentTime);
|
|
grabbed = False;
|
|
hostx_set_win_title("( ctrl+shift grabs mouse and keyboard )");
|
|
}
|
|
else
|
|
{
|
|
/* Attempt grab */
|
|
if (XGrabKeyboard (HostX.dpy, HostX.win, True,
|
|
GrabModeAsync,
|
|
GrabModeAsync,
|
|
CurrentTime) == 0)
|
|
{
|
|
if (XGrabPointer (HostX.dpy, HostX.win, True,
|
|
NoEventMask,
|
|
GrabModeAsync,
|
|
GrabModeAsync,
|
|
HostX.win, None, CurrentTime) == 0)
|
|
{
|
|
grabbed = True;
|
|
hostx_set_win_title("( ctrl+shift releases mouse and keyboard )");
|
|
}
|
|
else /* Failed pointer grabm ungrab keyboard */
|
|
XUngrabKeyboard (HostX.dpy, CurrentTime);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Still send the release event even if above has happened
|
|
* server will get confused with just an up event.
|
|
* Maybe it would be better to just block shift+ctrls getting to
|
|
* kdrive all togeather.
|
|
*/
|
|
ev->type = EPHYR_EV_KEY_RELEASE;
|
|
ev->key_state = xev.xkey.state;
|
|
ev->data.key_up.scancode = xev.xkey.keycode;
|
|
return 1;
|
|
|
|
default:
|
|
break;
|
|
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|