+/* Spaceball support for Linux.
+ * Written by John Tsiombikas <nuclear@member.fsf.org>
+ * Copied for Platform code by Evan Felix <karcaw at gmail.com>
+ * Creation date: Thur Feb 2 2012
+ *
+ * This code supports 3Dconnexion's 6-dof space-whatever devices.
+ * It can communicate with either the proprietary 3Dconnexion daemon (3dxsrv)
+ * free spacenavd (http://spacenav.sourceforge.net), through the "standard"
+ * magellan X-based protocol.
+ */
+
+#include <GL/freeglut.h>
+#include "../fg_internal.h"
+
+#include <X11/Xlib.h>
+
+extern int sball_initialized;
+
+enum {
+ SPNAV_EVENT_ANY, /* used by spnav_remove_events() */
+ SPNAV_EVENT_MOTION,
+ SPNAV_EVENT_BUTTON /* includes both press and release */
+};
+
+struct spnav_event_motion {
+ int type;
+ int x, y, z;
+ int rx, ry, rz;
+ unsigned int period;
+ int *data;
+};
+
+struct spnav_event_button {
+ int type;
+ int press;
+ int bnum;
+};
+
+typedef union spnav_event {
+ int type;
+ struct spnav_event_motion motion;
+ struct spnav_event_button button;
+} spnav_event;
+
+
+static int spnav_x11_open(Display *dpy, Window win);
+static int spnav_x11_window(Window win);
+static int spnav_x11_event(const XEvent *xev, spnav_event *event);
+static int spnav_close(void);
+static int spnav_fd(void);
+static int spnav_remove_events(int type);
+
+static SFG_Window *spnav_win;
+
+void fgPlatformInitializeSpaceball(void)
+{
+ Window w;
+
+ sball_initialized = 1;
+ if(!fgStructure.CurrentWindow)
+ {
+ sball_initialized = -1;
+ return;
+ }
+
+ w = fgStructure.CurrentWindow->Window.Handle;
+ if(spnav_x11_open(fgDisplay.pDisplay.Display, w) == -1)
+ {
+ sball_initialized = -1;
+ return;
+ }
+}
+
+void fgPlatformSpaceballClose(void)
+{
+ spnav_close();
+}
+
+int fgPlatformHasSpaceball(void)
+{
+ /* XXX this function should somehow query the driver if there's a device
+ * plugged in, as opposed to just checking if there's a driver to talk to.
+ */
+ return spnav_fd() == -1 ? 0 : 1;
+}
+
+int fgPlatformSpaceballNumButtons(void) {
+ return 2;
+}
+
+void fgPlatformSpaceballSetWindow(SFG_Window *window)
+{
+ if(spnav_win != window) {
+ spnav_x11_window(window->Window.Handle);
+ spnav_win = window;
+ }
+}
+
+int fgIsSpaceballXEvent(const XEvent *xev)
+{
+ spnav_event sev;
+
+ if(spnav_win != fgStructure.CurrentWindow) {
+ /* this will also initialize spaceball if needed (first call) */
+ fgSpaceballSetWindow(fgStructure.CurrentWindow);
+ }
+
+ if(sball_initialized != 1) {
+ return 0;
+ }
+
+ return spnav_x11_event(xev, &sev);
+}
+
+void fgSpaceballHandleXEvent(const XEvent *xev)
+{
+ spnav_event sev;
+
+ if(sball_initialized == 0) {
+ fgInitialiseSpaceball();
+ if(sball_initialized != 1) {
+ return;
+ }
+ }
+
+ if(spnav_x11_event(xev, &sev)) {
+ switch(sev.type) {
+ case SPNAV_EVENT_MOTION:
+ if(sev.motion.x | sev.motion.y | sev.motion.z) {
+ INVOKE_WCB(*spnav_win, SpaceMotion, (sev.motion.x, sev.motion.y, sev.motion.z));
+ }
+ if(sev.motion.rx | sev.motion.ry | sev.motion.rz) {
+ INVOKE_WCB(*spnav_win, SpaceRotation, (sev.motion.rx, sev.motion.ry, sev.motion.rz));
+ }
+ spnav_remove_events(SPNAV_EVENT_MOTION);
+ break;
+
+ case SPNAV_EVENT_BUTTON:
+ INVOKE_WCB(*spnav_win, SpaceButton, (sev.button.bnum, sev.button.press ? GLUT_DOWN : GLUT_UP));
+ break;
+
+ default:
+ break;
+ }
+ }
+}
+
+/*
+The following code is part of libspnav, part of the spacenav project (spacenav.sf.net)
+Copyright (C) 2007-2009 John Tsiombikas <nuclear@member.fsf.org>
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+3. The name of the author may not be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+OF SUCH DAMAGE.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+static Window get_daemon_window(Display *dpy);
+static int catch_badwin(Display *dpy, XErrorEvent *err);
+
+static Display *dpy;
+static Window app_win;
+static Atom motion_event, button_press_event, button_release_event, command_event;
+
+enum {
+ CMD_APP_WINDOW = 27695,
+ CMD_APP_SENS
+};
+
+#define IS_OPEN dpy
+
+struct event_node {
+ spnav_event event;
+ struct event_node *next;
+};
+
+static int spnav_x11_open(Display *display, Window win)
+{
+ if(IS_OPEN) {
+ return -1;
+ }
+
+ dpy = display;
+
+ motion_event = XInternAtom(dpy, "MotionEvent", True);
+ button_press_event = XInternAtom(dpy, "ButtonPressEvent", True);
+ button_release_event = XInternAtom(dpy, "ButtonReleaseEvent", True);
+ command_event = XInternAtom(dpy, "CommandEvent", True);
+
+ if(!motion_event || !button_press_event || !button_release_event || !command_event) {
+ dpy = 0;
+ return -1; /* daemon not started */
+ }
+
+ if(spnav_x11_window(win) == -1) {
+ dpy = 0;
+ return -1; /* daemon not started */
+ }
+
+ app_win = win;
+ return 0;
+}
+
+static int spnav_close(void)
+{
+ if(dpy) {
+ spnav_x11_window(DefaultRootWindow(dpy));
+ app_win = 0;
+ dpy = 0;
+ return 0;
+ }
+ return -1;
+}
+
+static int spnav_x11_window(Window win)
+{
+ int (*prev_xerr_handler)(Display*, XErrorEvent*);
+ XEvent xev;
+ Window daemon_win;
+
+ if(!IS_OPEN) {
+ return -1;
+ }
+
+ if(!(daemon_win = get_daemon_window(dpy))) {
+ return -1;
+ }
+
+ prev_xerr_handler = XSetErrorHandler(catch_badwin);
+
+ xev.type = ClientMessage;
+ xev.xclient.send_event = False;
+ xev.xclient.display = dpy;
+ xev.xclient.window = win;
+ xev.xclient.message_type = command_event;
+ xev.xclient.format = 16;
+ xev.xclient.data.s[0] = ((unsigned int)win & 0xffff0000) >> 16;
+ xev.xclient.data.s[1] = (unsigned int)win & 0xffff;
+ xev.xclient.data.s[2] = CMD_APP_WINDOW;
+
+ XSendEvent(dpy, daemon_win, False, 0, &xev);
+ XSync(dpy, False);
+
+ XSetErrorHandler(prev_xerr_handler);
+ return 0;
+}
+
+static int spnav_fd(void)
+{
+ if(dpy) {
+ return ConnectionNumber(dpy);
+ }
+ return -1;
+}
+
+/*static int spnav_wait_event(spnav_event *event)
+{
+ if(dpy) {
+ for(;;) {
+ XEvent xev;
+ XNextEvent(dpy, &xev);
+
+ if(spnav_x11_event(&xev, event) > 0) {
+ return event->type;
+ }
+ }
+ }
+ return 0;
+}
+
+static int spnav_poll_event(spnav_event *event)
+{
+ if(dpy) {
+ if(XPending(dpy)) {
+ XEvent xev;
+ XNextEvent(dpy, &xev);
+
+ return spnav_x11_event(&xev, event);
+ }
+ }
+ return 0;
+}*/
+
+static Bool match_events(Display *dpy, XEvent *xev, char *arg)
+{
+ int evtype = *(int*)arg;
+
+ if(xev->type != ClientMessage) {
+ return False;
+ }
+
+ if(xev->xclient.message_type == motion_event) {
+ return !evtype || evtype == SPNAV_EVENT_MOTION ? True : False;
+ }
+ if(xev->xclient.message_type == button_press_event ||
+ xev->xclient.message_type == button_release_event) {
+ return !evtype || evtype == SPNAV_EVENT_BUTTON ? True : False;
+ }
+ return False;
+}
+
+static int spnav_remove_events(int type)
+{
+ int rm_count = 0;
+
+ if(dpy) {
+ XEvent xev;
+
+ while(XCheckIfEvent(dpy, &xev, match_events, (char*)&type)) {
+ rm_count++;
+ }
+ return rm_count;
+ }
+ return 0;
+}
+
+static int spnav_x11_event(const XEvent *xev, spnav_event *event)
+{
+ int i;
+ int xmsg_type;
+
+ if(xev->type != ClientMessage) {
+ return 0;
+ }
+
+ xmsg_type = xev->xclient.message_type;
+
+ if(xmsg_type != motion_event && xmsg_type != button_press_event &&
+ xmsg_type != button_release_event) {
+ return 0;
+ }
+
+ if(xmsg_type == motion_event) {
+ event->type = SPNAV_EVENT_MOTION;
+ event->motion.data = &event->motion.x;
+
+ for(i=0; i<6; i++) {
+ event->motion.data[i] = xev->xclient.data.s[i + 2];
+ }
+ event->motion.period = xev->xclient.data.s[8];
+ } else {
+ event->type = SPNAV_EVENT_BUTTON;
+ event->button.press = xmsg_type == button_press_event ? 1 : 0;
+ event->button.bnum = xev->xclient.data.s[2];
+ }
+ return event->type;
+}
+
+
+static Window get_daemon_window(Display *dpy)
+{
+ Window win, root_win;
+ XTextProperty wname;
+ Atom type;
+ int fmt;
+ unsigned long nitems, bytes_after;
+ unsigned char *prop;
+
+ root_win = DefaultRootWindow(dpy);
+
+ XGetWindowProperty(dpy, root_win, command_event, 0, 1, False, AnyPropertyType, &type, &fmt, &nitems, &bytes_after, &prop);
+ if(!prop) {
+ return 0;
+ }
+
+ win = *(Window*)prop;
+ XFree(prop);
+
+ if(!XGetWMName(dpy, win, &wname) || strcmp("Magellan Window", (char*)wname.value) != 0) {
+ return 0;
+ }
+
+ return win;
+}
+
+static int catch_badwin(Display *dpy, XErrorEvent *err)
+{
+ char buf[256];
+
+ if(err->error_code == BadWindow) {
+ /* do nothing? */
+ } else {
+ XGetErrorText(dpy, err->error_code, buf, sizeof buf);
+ fprintf(stderr, "Caught unexpected X error: %s\n", buf);
+ }
+ return 0;
+}
+
projects / freeglut / blobdiff