rw_x11.c

Quake 2 Source code for students by Theerthan You can also download from idsoftwares.com

				 None,
				 CurrentTime);

	if (in_dgamouse->value) {
		int MajorVersion, MinorVersion;

		if (!XF86DGAQueryVersion(dpy, &MajorVersion, &MinorVersion)) { 
			// unable to query, probalby not supported
			ri.Con_Printf( PRINT_ALL, "Failed to detect XF86DGA Mouse\n" );
			ri.Cvar_Set( "in_dgamouse", "0" );
		} else {
			dgamouse = true;
			XF86DGADirectVideo(dpy, DefaultScreen(dpy), XF86DGADirectMouse);
			XWarpPointer(dpy, None, win, 0, 0, 0, 0, 0, 0);
		}
	} else
		XWarpPointer(dpy, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);

	XGrabKeyboard(dpy, win,
				  False,
				  GrabModeAsync, GrabModeAsync,
				  CurrentTime);

	mouse_active = true;

	ignorefirst = true;

//	XSync(dpy, True);
}

static void uninstall_grabs(void)
{
	if (!dpy || !win)
		return;

	if (dgamouse) {
		dgamouse = false;
		XF86DGADirectVideo(dpy, DefaultScreen(dpy), 0);
	}

	XUngrabPointer(dpy, CurrentTime);
	XUngrabKeyboard(dpy, CurrentTime);

// inviso cursor
	XUndefineCursor(dpy, win);

	mouse_active = false;
}

static void IN_DeactivateMouse( void ) 
{
	if (!mouse_avail || !dpy || !win)
		return;

	if (mouse_active) {
		uninstall_grabs();
		mouse_active = false;
	}
}

static void IN_ActivateMouse( void ) 
{
	if (!mouse_avail || !dpy || !win)
		return;

	if (!mouse_active) {
		mx = my = 0; // don't spazz
		install_grabs();
		mouse_active = true;
	}
}

void RW_IN_Frame (void)
{
}

void RW_IN_Activate(qboolean active)
{
	if (active)
		IN_ActivateMouse();
	else
		IN_DeactivateMouse ();
}

/*****************************************************************************/

void ResetFrameBuffer(void)
{
	int mem;
	int pwidth;

	if (x_framebuffer[0])
	{
		free(x_framebuffer[0]->data);
		free(x_framebuffer[0]);
	}

// alloc an extra line in case we want to wrap, and allocate the z-buffer
	pwidth = x_visinfo->depth / 8;
	if (pwidth == 3) pwidth = 4;
	mem = ((vid.width*pwidth+7)&~7) * vid.height;

	x_framebuffer[0] = XCreateImage(dpy,
		x_vis,
		x_visinfo->depth,
		ZPixmap,
		0,
		malloc(mem),
		vid.width, vid.height,
		32,
		0);

	if (!x_framebuffer[0])
		Sys_Error("VID: XCreateImage failed\n");

	vid.buffer = (byte*) (x_framebuffer[0]);
}

void ResetSharedFrameBuffers(void)
{
	int size;
	int key;
	int minsize = getpagesize();
	int frm;

	for (frm=0 ; frm<2 ; frm++)
	{
	// free up old frame buffer memory
		if (x_framebuffer[frm])
		{
			XShmDetach(dpy, &x_shminfo[frm]);
			free(x_framebuffer[frm]);
			shmdt(x_shminfo[frm].shmaddr);
		}

	// create the image
		x_framebuffer[frm] = XShmCreateImage(	dpy,
						x_vis,
						x_visinfo->depth,
						ZPixmap,
						0,
						&x_shminfo[frm],
						vid.width,
						vid.height );

	// grab shared memory

		size = x_framebuffer[frm]->bytes_per_line
			* x_framebuffer[frm]->height;
		if (size < minsize)
			Sys_Error("VID: Window must use at least %d bytes\n", minsize);

		key = random();
		x_shminfo[frm].shmid = shmget((key_t)key, size, IPC_CREAT|0777);
		if (x_shminfo[frm].shmid==-1)
			Sys_Error("VID: Could not get any shared memory\n");

		// attach to the shared memory segment
		x_shminfo[frm].shmaddr =
			(void *) shmat(x_shminfo[frm].shmid, 0, 0);

		ri.Con_Printf(PRINT_DEVELOPER, "MITSHM shared memory (id=%d, addr=0x%lx)\n", 
			x_shminfo[frm].shmid, (long) x_shminfo[frm].shmaddr);

		x_framebuffer[frm]->data = x_shminfo[frm].shmaddr;

	// get the X server to attach to it

		if (!XShmAttach(dpy, &x_shminfo[frm]))
			Sys_Error("VID: XShmAttach() failed\n");
		XSync(dpy, 0);
		shmctl(x_shminfo[frm].shmid, IPC_RMID, 0);
	}

}

// ========================================================================
// Tragic death handler
// ========================================================================

void TragicDeath(int signal_num)
{
//	XAutoRepeatOn(dpy);
	XCloseDisplay(dpy);
	Sys_Error("This death brought to you by the number %d\n", signal_num);
}

int XLateKey(XKeyEvent *ev)
{

	int key;
	char buf[64];
	KeySym keysym;

	key = 0;

	XLookupString(ev, buf, sizeof buf, &keysym, 0);

	switch(keysym)
	{
		case XK_KP_Page_Up:	 key = K_KP_PGUP; break;
		case XK_Page_Up:	 key = K_PGUP; break;

		case XK_KP_Page_Down: key = K_KP_PGDN; break;
		case XK_Page_Down:	 key = K_PGDN; break;

		case XK_KP_Home: key = K_KP_HOME; break;
		case XK_Home:	 key = K_HOME; break;

		case XK_KP_End:  key = K_KP_END; break;
		case XK_End:	 key = K_END; break;

		case XK_KP_Left: key = K_KP_LEFTARROW; break;
		case XK_Left:	 key = K_LEFTARROW; break;

		case XK_KP_Right: key = K_KP_RIGHTARROW; break;
		case XK_Right:	key = K_RIGHTARROW;		break;

		case XK_KP_Down: key = K_KP_DOWNARROW; break;
		case XK_Down:	 key = K_DOWNARROW; break;

		case XK_KP_Up:   key = K_KP_UPARROW; break;
		case XK_Up:		 key = K_UPARROW;	 break;

		case XK_Escape: key = K_ESCAPE;		break;

		case XK_KP_Enter: key = K_KP_ENTER;	break;
		case XK_Return: key = K_ENTER;		 break;

		case XK_Tab:		key = K_TAB;			 break;

		case XK_F1:		 key = K_F1;				break;

		case XK_F2:		 key = K_F2;				break;

		case XK_F3:		 key = K_F3;				break;

		case XK_F4:		 key = K_F4;				break;

		case XK_F5:		 key = K_F5;				break;

		case XK_F6:		 key = K_F6;				break;

		case XK_F7:		 key = K_F7;				break;

		case XK_F8:		 key = K_F8;				break;

		case XK_F9:		 key = K_F9;				break;

		case XK_F10:		key = K_F10;			 break;

		case XK_F11:		key = K_F11;			 break;

		case XK_F12:		key = K_F12;			 break;

		case XK_BackSpace: key = K_BACKSPACE; break;

		case XK_KP_Delete: key = K_KP_DEL; break;
		case XK_Delete: key = K_DEL; break;

		case XK_Pause:	key = K_PAUSE;		 break;

		case XK_Shift_L:
		case XK_Shift_R:	key = K_SHIFT;		break;

		case XK_Execute: 
		case XK_Control_L: 
		case XK_Control_R:	key = K_CTRL;		 break;

		case XK_Alt_L:	
		case XK_Meta_L: 
		case XK_Alt_R:	
		case XK_Meta_R: key = K_ALT;			break;

		case XK_KP_Begin: key = K_KP_5;	break;

		case XK_Insert:key = K_INS; break;
		case XK_KP_Insert: key = K_KP_INS; break;

		case XK_KP_Multiply: key = '*'; break;
		case XK_KP_Add:  key = K_KP_PLUS; break;
		case XK_KP_Subtract: key = K_KP_MINUS; break;
		case XK_KP_Divide: key = K_KP_SLASH; break;

#if 0
		case 0x021: key = '1';break;/* [!] */
		case 0x040: key = '2';break;/* [@] */
		case 0x023: key = '3';break;/* [#] */
		case 0x024: key = '4';break;/* [$] */
		case 0x025: key = '5';break;/* [%] */
		case 0x05e: key = '6';break;/* [^] */
		case 0x026: key = '7';break;/* [&] */
		case 0x02a: key = '8';break;/* [*] */
		case 0x028: key = '9';;break;/* [(] */
		case 0x029: key = '0';break;/* [)] */
		case 0x05f: key = '-';break;/* [_] */
		case 0x02b: key = '=';break;/* [+] */
		case 0x07c: key = '\'';break;/* [|] */
		case 0x07d: key = '[';break;/* [}] */
		case 0x07b: key = ']';break;/* [{] */
		case 0x022: key = '\'';break;/* ["] */
		case 0x03a: key = ';';break;/* [:] */
		case 0x03f: key = '/';break;/* [?] */
		case 0x03e: key = '.';break;/* [>] */
		case 0x03c: key = ',';break;/* [<] */
#endif

		default:
			key = *(unsigned char*)buf;
			if (key >= 'A' && key <= 'Z')
				key = key - 'A' + 'a';
			break;
	} 

	return key;
}

void HandleEvents(void)
{
	XEvent event;
	int b;
	qboolean dowarp = false;
	int mwx = vid.width/2;
	int mwy = vid.height/2;
   
	while (XPending(dpy)) {

		XNextEvent(dpy, &event);

		switch(event.type) {
		case KeyPress:
		case KeyRelease:
			if (in_state && in_state->Key_Event_fp)
				in_state->Key_Event_fp (XLateKey(&event.xkey), event.type == KeyPress);
			break;

		case MotionNotify:
			if (ignorefirst) {
				ignorefirst = false;
				break;
			}

			if (mouse_active) {
				if (dgamouse) {
					mx += (event.xmotion.x + win_x) * 2;
					my += (event.xmotion.y + win_y) * 2;
				} 
				else 
				{
					mx += ((int)event.xmotion.x - mwx) * 2;
					my += ((int)event.xmotion.y - mwy) * 2;
					mwx = event.xmotion.x;
					mwy = event.xmotion.y;

					if (mx || my)
						dowarp = true;
				}
			}
			break;


			break;

		case ButtonPress:
			b=-1;
			if (event.xbutton.button == 1)
				b = 0;
			else if (event.xbutton.button == 2)
				b = 2;
			else if (event.xbutton.button == 3)
				b = 1;
			if (b>=0)
				mouse_buttonstate |= 1<<b;
			break;

		case ButtonRelease:
			b=-1;
			if (event.xbutton.button == 1)
				b = 0;
			else if (event.xbutton.button == 2)
				b = 2;
			else if (event.xbutton.button == 3)
				b = 1;
			if (b>=0)
				mouse_buttonstate &= ~(1<<b);
			break;
		
		case CreateNotify :
			ri.Cvar_Set( "vid_xpos", va("%d", event.xcreatewindow.x));
			ri.Cvar_Set( "vid_ypos", va("%d", event.xcreatewindow.y));
			vid_xpos->modified = false;
			vid_ypos->modified = false;
			win_x = event.xcreatewindow.x;
			win_y = event.xcreatewindow.y;
			break;

		case ConfigureNotify :
			ri.Cvar_Set( "vid_xpos", va("%d", event.xcreatewindow.x));
			ri.Cvar_Set( "vid_ypos", va("%d", event.xcreatewindow.y));
			vid_xpos->modified = false;
			vid_ypos->modified = false;
			win_x = event.xconfigure.x;
			win_y = event.xconfigure.y;
			config_notify_width = event.xconfigure.width;
			config_notify_height = event.xconfigure.height;
			if (config_notify_width != vid.width ||
				config_notify_height != vid.height)
				XMoveResizeWindow(dpy, win, win_x, win_y, vid.width, vid.height);
			config_notify = 1;
			break;

		default:
			if (doShm && event.type == x_shmeventtype)
				oktodraw = true;
			if (event.type == Expose && !event.xexpose.count)
				exposureflag = true;
		}
	}
	   
	if (dowarp) {
		/* move the mouse to the window center again */
		XWarpPointer(dpy,None,win,0,0,0,0, vid.width/2,vid.height/2);
	}
}