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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.  
  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. //
  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.  
  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.  
  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.  
  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
  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.