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1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3 
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8 
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 
13 See the GNU General Public License for more details.
14 
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18 
19 */
20 // in_sun.c -- SUN/X mouse input handler
21 
22 #include <sys/time.h>
23 #include <sys/types.h>
24 #include <unistd.h>
25 #include <signal.h>
26 #include <stdlib.h>
27 #include <stdio.h>
28 #include <string.h>
29 #include <sys/ipc.h>
30 #include <sys/shm.h>
31 #include <X11/Xlib.h>
32 #include <X11/Xutil.h>
33 #include <X11/Xatom.h>
34 #include <X11/keysym.h>
35 
36 #include "quakedef.h"
37 
38 
39 //
40 // typedefs and defines
41 //
42 
43 #define MOUSE_SCALE		4
44 
45 //
46 // externs
47 //
48 
49 extern Display			*x_disp;
50 extern int				x_screen, x_screen_width, x_screen_height;
51 extern int			x_center_height, x_center_width;
52 extern int				x_std_event_mask;
53 extern Window			x_win, x_root_win;
54 extern qboolean			x_fullscreen;
55 extern qboolean			x_focus;
56 extern int			global_dx, global_dy;
57 //
58 // globals
59 //
60 
61 cvar_t					_windowed_mouse = {"_windowed_mouse","1", true};
62 int					x_root, y_root;
63 int					x_root_old, y_root_old;
64 //
65 // locals
66 //
67 
68 static int				x_mouse_num, x_mouse_denom, x_mouse_thresh;
69 
70 
71 static qboolean x_grabbed = false;
72 
73 //
74 // IN_CenterMouse - center the mouse in the screen
75 //
76 
IN_CenterMouse(void)77 void IN_CenterMouse( void )
78 {
79 	CheckMouseState();
80 
81 	if (!x_grabbed)
82 		return;
83 
84 	XSelectInput( x_disp, x_win, x_std_event_mask & ~PointerMotionMask );
85 	XWarpPointer( x_disp, None, x_root_win, 0, 0, 0, 0, x_center_width,
86 		      x_center_height );
87 	XSelectInput( x_disp, x_win, x_std_event_mask );
88 }
89 
90 //
91 // Check to see if we have grabbed the mouse or not and deal with it
92 // appropriately
93 //
CheckMouseState(void)94 static void CheckMouseState(void)
95 {
96 	if (x_focus && _windowed_mouse.value && !x_grabbed) {
97 		x_grabbed = true;
98 		printf("fooling with mouse!\n");
99 		if (XGetPointerControl( x_disp, &x_mouse_num, &x_mouse_denom, &x_mouse_thresh ))
100 			printf( "XGetPointerControl failed!\n" );
101 		//printf( "mouse %d/%d thresh %d\n", x_mouse_num, x_mouse_denom, x_mouse_thresh );
102 
103 		// make input rawer
104 		XAutoRepeatOff(x_disp);
105 		XGrabKeyboard(x_disp, x_win, True, GrabModeAsync, GrabModeAsync, CurrentTime);
106 		XGrabPointer(x_disp, x_win, True,
107 			     PointerMotionMask | ButtonPressMask | ButtonReleaseMask,
108 			     GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
109 
110 //		if (XChangePointerControl( x_disp, True, True, 1, MOUSE_SCALE, x_mouse_thresh ))
111 //			printf( "XChangePointerControl failed!\n" );
112 
113 		IN_CenterMouse();
114 
115 		// safe initial values
116 		x_root = x_root_old = vid.width >> 1;
117 		y_root = y_root_old = vid.height >> 1;
118 	} else if (x_grabbed && (!_windowed_mouse.value || !x_focus)) {
119 		printf("fooling with mouse!\n");
120 		x_grabbed = false;
121 		// undo mouse warp
122 		if (XChangePointerControl( x_disp, True, True, x_mouse_num, x_mouse_denom, x_mouse_thresh ))
123 			printf( "XChangePointerControl failed!\n" );
124 
125 		XUngrabPointer( x_disp, CurrentTime );
126 		XUngrabKeyboard( x_disp, CurrentTime );
127 		XAutoRepeatOn( x_disp );
128 	}
129 }
130 
131 
132 //
133 // IN_Init - setup mouse input
134 //
135 
IN_Init(void)136 void IN_Init (void)
137 {
138     if (!x_disp) Sys_Error( "X display not open!\n" );
139 
140     Cvar_RegisterVariable (&_windowed_mouse);
141 
142 	// we really really want to clean these up...
143     atexit( IN_Shutdown );
144 }
145 
146 //
147 // IN_Shutdown - clean up mouse settings (must be done from signal handler too!)
148 //
149 
IN_Shutdown(void)150 void IN_Shutdown (void)
151 {
152     if (!x_disp) return;
153 
154 	// undo mouse warp
155 	if (XChangePointerControl( x_disp, True, True, x_mouse_num, x_mouse_denom, x_mouse_thresh ))
156 		printf( "XChangePointerControl failed!\n" );
157 
158 	XUngrabPointer( x_disp, CurrentTime );
159 	XUngrabKeyboard( x_disp, CurrentTime );
160 	XAutoRepeatOn( x_disp );
161 }
162 
163 //
164 // IN_Commands - process buttons
165 //
166 
IN_Commands(void)167 void IN_Commands (void)
168 {
169 	// done in X event handler
170 }
171 
172 //
173 // IN_Move - process mouse moves
174 //
175 
176 void
IN_Move(usercmd_t * cmd)177 IN_Move (usercmd_t *cmd)
178 {
179 	static int last_dx, last_dy;
180 	static long long last_movement;
181 	long long now, gethrtime();
182 
183 	int dx, dy;
184 
185 	CheckMouseState();
186 
187 
188 	if (!x_grabbed)
189 		return; // no mouse movement
190 
191 
192 	now = gethrtime();
193 
194 	dx = global_dx;
195 	global_dx = 0;
196 
197 	dy = global_dy;
198 	global_dy = 0;
199 
200 //	printf("GOT: dx %d dy %d\n", dx, dy);
201 
202 	dx *= sensitivity.value;
203 	dy *= sensitivity.value;
204 
205 //
206 //	implement low pass filter to smooth motion a bit
207 //
208 	if (now - last_movement > 100000000) {
209 		dx = .6 * dx;
210 		dy = .6 * dy;
211 	}
212 	last_movement = now;
213 
214 	dx = .6 * dx + .4 * last_dx;
215 	dy = .6 * dy + .4 * last_dy;
216 
217 
218 	last_dx = dx;
219 	last_dy = dy;
220 
221 	if (!dx && !dy) {
222 		if (in_mlook.state & 1)
223 			V_StopPitchDrift ();
224 		return;
225 	}
226 
227 	// add mouse X/Y movement to cmd
228 	if ((in_strafe.state & 1) || (lookstrafe.value && (in_mlook.state & 1)))
229 		cmd->sidemove += m_side.value * dx;
230 	else
231 		cl.viewangles[YAW] -= m_yaw.value * dx;
232 
233 	if (in_mlook.state & 1)
234 		V_StopPitchDrift ();
235 
236 	if ((in_mlook.state & 1) && !(in_strafe.state & 1)) {
237 		cl.viewangles[PITCH] += m_pitch.value * dy;
238 		if (cl.viewangles[PITCH] > 80) cl.viewangles[PITCH] = 80;
239 		if (cl.viewangles[PITCH] < -70) cl.viewangles[PITCH] = -70;
240 	}
241 	else {
242 		if ((in_strafe.state & 1) && noclip_anglehack) cmd->upmove -= m_forward.value * dy;
243 		else cmd->forwardmove -= m_forward.value * dy;
244 	}
245 }
246