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xserver/hw/kdrive/ephyr/hostx.c

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/*
* Xephyr - A kdrive X server thats runs in a host X window.
* Authored by Matthew Allum <mallum@o-hand.com>
*
* Copyright © 2004 Nokia
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Nokia not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Nokia makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* NOKIA DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL NOKIA BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "hostx.h"
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h> /* for memset */
#include <time.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/time.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <X11/extensions/XShm.h>
/*
* All xlib calls go here, which gets built as its own .a .
* Mixing kdrive and xlib headers causes all sorts of types
* to get clobbered.
*/
struct EphyrHostXVars
{
char *server_dpy_name;
Display *dpy;
int screen;
Visual *visual;
Window win, winroot;
Window win_pre_existing; /* Set via -parent option like xnest */
GC gc;
int depth;
int server_depth;
XImage *ximg;
int win_width, win_height;
Bool use_host_cursor;
Bool use_fullscreen;
Bool have_shm;
long damage_debug_msec;
unsigned char *fb_data; /* only used when host bpp != server bpp */
unsigned long cmap[256];
XShmSegmentInfo shminfo;
};
/* memset ( missing> ) instead of below */
static EphyrHostXVars HostX = { "?", 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
static int HostXWantDamageDebug = 0;
extern EphyrKeySyms ephyrKeySyms;
extern int monitorResolution;
static void
hostx_set_fullscreen_hint(void);
/* X Error traps */
static int trapped_error_code = 0;
static int (*old_error_handler) (Display *d, XErrorEvent *e);
#define host_depth_matches_server() (HostX.depth == HostX.server_depth)
static int
error_handler(Display *display,
XErrorEvent *error)
{
trapped_error_code = error->error_code;
return 0;
}
static void
hostx_errors_trap(void)
{
trapped_error_code = 0;
old_error_handler = XSetErrorHandler(error_handler);
}
static int
hostx_errors_untrap(void)
{
XSetErrorHandler(old_error_handler);
return trapped_error_code;
}
int
hostx_want_screen_size(int *width, int *height)
{
if (HostX.win_pre_existing != None
|| HostX.use_fullscreen == True)
{
*width = HostX.win_width;
*height = HostX.win_height;
return 1;
}
return 0;
}
void
hostx_set_display_name(char *name)
{
HostX.server_dpy_name = strdup(name);
}
void
hostx_set_win_title(char *extra_text)
{
char buf[256];
snprintf(buf, 256, "Xephyr on %s %s",
HostX.server_dpy_name,
(extra_text != NULL) ? extra_text : "");
XStoreName(HostX.dpy, HostX.win, buf);
}
int
hostx_want_host_cursor(void)
{
return HostX.use_host_cursor;
}
void
hostx_use_host_cursor(void)
{
HostX.use_host_cursor = True;
}
int
hostx_want_preexisting_window(void)
{
if (HostX.win_pre_existing)
return 1;
else
return 0;
}
void
hostx_use_fullscreen(void)
{
HostX.use_fullscreen = True;
}
int
hostx_want_fullscreen(void)
{
return HostX.use_fullscreen;
}
static void
hostx_set_fullscreen_hint(void)
{
Atom atom_WINDOW_STATE, atom_WINDOW_STATE_FULLSCREEN;
atom_WINDOW_STATE
= XInternAtom(HostX.dpy, "_NET_WM_STATE", False);
atom_WINDOW_STATE_FULLSCREEN
= XInternAtom(HostX.dpy, "_NET_WM_STATE_FULLSCREEN",False);
XChangeProperty(HostX.dpy, HostX.win,
atom_WINDOW_STATE, XA_ATOM, 32,
PropModeReplace,
(unsigned char *)&atom_WINDOW_STATE_FULLSCREEN, 1);
}
void
hostx_use_preexisting_window(unsigned long win_id)
{
HostX.win_pre_existing = win_id;
}
static void
hostx_toggle_damage_debug(void)
{
HostXWantDamageDebug ^= 1;
}
void
hostx_handle_signal(int signum)
{
hostx_toggle_damage_debug();
EPHYR_DBG("Signal caught. Damage Debug:%i\n", HostXWantDamageDebug);
}
int
hostx_init(void)
{
XSetWindowAttributes attr;
Cursor empty_cursor;
Pixmap cursor_pxm;
XColor col;
attr.event_mask =
ButtonPressMask
|ButtonReleaseMask
|PointerMotionMask
|KeyPressMask
|KeyReleaseMask
|ExposureMask;
EPHYR_DBG("mark");
if ((HostX.dpy = XOpenDisplay(getenv("DISPLAY"))) == NULL)
{
fprintf(stderr, "\nXephyr cannot open host display. Is DISPLAY set?\n");
exit(1);
}
HostX.screen = DefaultScreen(HostX.dpy);
HostX.winroot = RootWindow(HostX.dpy, HostX.screen);
HostX.gc = XCreateGC(HostX.dpy, HostX.winroot, 0, NULL);
HostX.depth = DefaultDepth(HostX.dpy, HostX.screen);
HostX.visual = DefaultVisual(HostX.dpy, HostX.screen);
HostX.server_depth = HostX.depth;
if (HostX.win_pre_existing != None)
{
Status result;
XWindowAttributes prewin_attr;
/* Get screen size from existing window */
hostx_errors_trap();
result = XGetWindowAttributes(HostX.dpy,
HostX.win_pre_existing,
&prewin_attr);
if (hostx_errors_untrap() || !result)
{
fprintf(stderr, "\nXephyr -parent window' does not exist!\n");
exit(1);
}
HostX.win_width = prewin_attr.width;
HostX.win_height = prewin_attr.height;
HostX.win = XCreateWindow(HostX.dpy,
HostX.win_pre_existing,
0,0,HostX.win_width,HostX.win_height,
0,
CopyFromParent,
CopyFromParent,
CopyFromParent,
CWEventMask,
&attr);
}
else
{
HostX.win = XCreateWindow(HostX.dpy,
HostX.winroot,
0,0,100,100, /* will resize */
0,
CopyFromParent,
CopyFromParent,
CopyFromParent,
CWEventMask,
&attr);
hostx_set_win_title("( ctrl+shift grabs mouse and keyboard )");
if (HostX.use_fullscreen)
{
HostX.win_width = DisplayWidth(HostX.dpy, HostX.screen);
HostX.win_height = DisplayHeight(HostX.dpy, HostX.screen);
hostx_set_fullscreen_hint();
}
}
XParseColor(HostX.dpy, DefaultColormap(HostX.dpy,HostX.screen), "red", &col);
XAllocColor(HostX.dpy, DefaultColormap(HostX.dpy, HostX.screen), &col);
XSetForeground(HostX.dpy, HostX.gc, col.pixel);
if (!hostx_want_host_cursor())
{
/* Ditch the cursor, we provide our 'own' */
cursor_pxm = XCreatePixmap (HostX.dpy, HostX.winroot, 1, 1, 1);
memset (&col, 0, sizeof (col));
empty_cursor = XCreatePixmapCursor (HostX.dpy,
cursor_pxm, cursor_pxm,
&col, &col, 1, 1);
XDefineCursor (HostX.dpy, HostX.win, empty_cursor);
XFreePixmap (HostX.dpy, cursor_pxm);
}
HostX.ximg = NULL;
/* Try to get share memory ximages for a little bit more speed */
if (!XShmQueryExtension(HostX.dpy) || getenv("XEPHYR_NO_SHM"))
{
fprintf(stderr, "\nXephyr unable to use SHM XImages\n");
HostX.have_shm = False;
}
else
{
/* Really really check we have shm - better way ?*/
XShmSegmentInfo shminfo;
HostX.have_shm = True;
shminfo.shmid=shmget(IPC_PRIVATE, 1, IPC_CREAT|0777);
shminfo.shmaddr=shmat(shminfo.shmid,0,0);
shminfo.readOnly=True;
hostx_errors_trap();
XShmAttach(HostX.dpy, &shminfo);
XSync(HostX.dpy, False);
if (hostx_errors_untrap())
{
fprintf(stderr, "\nXephyr unable to use SHM XImages\n");
HostX.have_shm = False;
}
shmdt(shminfo.shmaddr);
shmctl(shminfo.shmid, IPC_RMID, 0);
}
XFlush(HostX.dpy);
/* Setup the pause time between paints when debugging updates */
HostX.damage_debug_msec = 20000; /* 1/50 th of a second */
if (getenv("XEPHYR_PAUSE"))
{
HostX.damage_debug_msec = strtol(getenv("XEPHYR_PAUSE"), NULL, 0);
EPHYR_DBG("pause is %li\n", HostX.damage_debug_msec);
}
return 1;
}
int
hostx_get_depth (void)
{
return HostX.depth;
}
int
hostx_get_server_depth (void)
{
return HostX.server_depth;
}
void
hostx_set_server_depth(int depth)
{
HostX.server_depth = depth;
}
int
hostx_get_bpp(void)
{
if (host_depth_matches_server())
return HostX.visual->bits_per_rgb;
else
return HostX.server_depth; /* XXX correct ? */
}
void
hostx_get_visual_masks (CARD32 *rmsk,
CARD32 *gmsk,
CARD32 *bmsk)
{
if (host_depth_matches_server())
{
*rmsk = HostX.visual->red_mask;
*gmsk = HostX.visual->green_mask;
*bmsk = HostX.visual->blue_mask;
}
else if (HostX.server_depth == 16)
{
/* Assume 16bpp 565 */
*rmsk = 0xf800;
*gmsk = 0x07e0;
*bmsk = 0x001f;
}
else
{
*rmsk = 0x0;
*gmsk = 0x0;
*bmsk = 0x0;
}
}
void
hostx_set_cmap_entry(unsigned char idx,
unsigned char r,
unsigned char g,
unsigned char b)
{
/* XXX Will likely break for 8 on 16, not sure if this is correct */
HostX.cmap[idx] = (r << 16) | (g << 8) | (b);
}
/**
* hostx_screen_init creates the XImage that will contain the front buffer of
* the ephyr screen, and possibly offscreen memory.
*
* @param width width of the screen
* @param height height of the screen
* @param buffer_height height of the rectangle to be allocated.
*
* hostx_screen_init() creates an XImage, using MIT-SHM if it's available.
* buffer_height can be used to create a larger offscreen buffer, which is used
* by fakexa for storing offscreen pixmap data.
*/
void*
hostx_screen_init (int width, int height, int buffer_height)
{
int bitmap_pad;
Bool shm_success = False;
XSizeHints *size_hints;
EPHYR_DBG("mark");
if (HostX.ximg != NULL)
{
/* Free up the image data if previously used
* i.ie called by server reset
*/
if (HostX.have_shm)
{
XShmDetach(HostX.dpy, &HostX.shminfo);
XDestroyImage (HostX.ximg);
shmdt(HostX.shminfo.shmaddr);
shmctl(HostX.shminfo.shmid, IPC_RMID, 0);
}
else
{
if (HostX.ximg->data)
{
free(HostX.ximg->data);
HostX.ximg->data = NULL;
}
XDestroyImage(HostX.ximg);
}
}
if (HostX.have_shm)
{
HostX.ximg = XShmCreateImage(HostX.dpy, HostX.visual, HostX.depth,
ZPixmap, NULL, &HostX.shminfo,
width, buffer_height );
HostX.shminfo.shmid = shmget(IPC_PRIVATE,
HostX.ximg->bytes_per_line * buffer_height,
IPC_CREAT|0777);
HostX.shminfo.shmaddr = HostX.ximg->data = shmat(HostX.shminfo.shmid,
0, 0);
if (HostX.ximg->data == (char *)-1)
{
EPHYR_DBG("Can't attach SHM Segment, falling back to plain XImages");
HostX.have_shm = False;
XDestroyImage(HostX.ximg);
shmctl(HostX.shminfo.shmid, IPC_RMID, 0);
}
else
{
EPHYR_DBG("SHM segment attached");
HostX.shminfo.readOnly = False;
XShmAttach(HostX.dpy, &HostX.shminfo);
shm_success = True;
}
}
if (!shm_success)
{
bitmap_pad = ( HostX.depth > 16 )? 32 : (( HostX.depth > 8 )? 16 : 8 );
HostX.ximg = XCreateImage( HostX.dpy,
HostX.visual,
HostX.depth,
ZPixmap, 0, 0,
width,
buffer_height,
bitmap_pad,
0);
HostX.ximg->data = malloc( HostX.ximg->bytes_per_line * buffer_height );
}
XResizeWindow(HostX.dpy, HostX.win, width, height);
/* Ask the WM to keep our size static */
size_hints = XAllocSizeHints();
size_hints->max_width = size_hints->min_width = width;
size_hints->max_height = size_hints->min_height = height;
size_hints->flags = PMinSize|PMaxSize;
XSetWMNormalHints(HostX.dpy, HostX.win, size_hints);
XFree(size_hints);
XMapWindow(HostX.dpy, HostX.win);
XSync(HostX.dpy, False);
HostX.win_width = width;
HostX.win_height = height;
if (host_depth_matches_server())
{
EPHYR_DBG("Host matches server");
return HostX.ximg->data;
}
else
{
EPHYR_DBG("server bpp %i", HostX.server_depth>>3);
HostX.fb_data = malloc(width*buffer_height*(HostX.server_depth>>3));
return HostX.fb_data;
}
}
void
hostx_paint_rect(int sx, int sy,
int dx, int dy,
int width, int height)
{
/*
* Copy the image data updated by the shadow layer
* on to the window
*/
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 host_width, min_keycode, max_keycode, width;
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,
&host_width);
/* 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 at most the first 4 ( xorg has 6 per keycode, XVNC 2 )
*/
width = (host_width > 4) ? 4 : host_width;
ephyrKeySyms.map = (KeySym *)calloc(sizeof(KeySym),
(max_keycode - min_keycode + 1) *
width);
if (!ephyrKeySyms.map)
return;
for (i=0; i<(max_keycode - min_keycode+1); i++)
for (j=0; j<width; j++)
ephyrKeySyms.map[(i*width)+j] = keymap[(i*host_width) + j];
EPHYR_DBG("keymap width, host:%d kdrive:%d", host_width, width);
ephyrKeySyms.minKeyCode = min_keycode;
ephyrKeySyms.maxKeyCode = max_keycode;
ephyrKeySyms.mapWidth = width;
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;
}
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