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