linux_glimp.c

quakeIII源码这个不用我多说吧

}

// bk001206 - from Ryan's Fakk2
/**
 * XPending() actually performs a blocking read 
 *  if no events available. From Fakk2, by way of
 *  Heretic2, by way of SDL, original idea GGI project.
 * The benefit of this approach over the quite
 *  badly behaved XAutoRepeatOn/Off is that you get
 *  focus handling for free, which is a major win
 *  with debug and windowed mode. It rests on the
 *  assumption that the X server will use the
 *  same timestamp on press/release event pairs 
 *  for key repeats. 
 */
static qboolean X11_PendingInput(void) {

  assert(dpy != NULL);

  // Flush the display connection
  //  and look to see if events are queued
  XFlush( dpy );
  if ( XEventsQueued( dpy, QueuedAlready) )
  {
    return qtrue;
  }

  // More drastic measures are required -- see if X is ready to talk
  {
    static struct timeval zero_time;
    int x11_fd;
    fd_set fdset;

    x11_fd = ConnectionNumber( dpy );
    FD_ZERO(&fdset);
    FD_SET(x11_fd, &fdset);
    if ( select(x11_fd+1, &fdset, NULL, NULL, &zero_time) == 1 )
    {
      return(XPending(dpy));
    }
  }

  // Oh well, nothing is ready ..
  return qfalse;
}

// bk001206 - from Ryan's Fakk2. See above.
static qboolean repeated_press(XEvent *event)
{
  XEvent        peekevent;
  qboolean      repeated = qfalse;

  assert(dpy != NULL);

  if (X11_PendingInput())
  {
    XPeekEvent(dpy, &peekevent);

    if ((peekevent.type == KeyPress) &&
        (peekevent.xkey.keycode == event->xkey.keycode) &&
        (peekevent.xkey.time == event->xkey.time))
    {
      repeated = qtrue;
      XNextEvent(dpy, &peekevent);  // skip event.
    } // if
  } // if

  return(repeated);
} // repeated_press

int Sys_XTimeToSysTime (Time xtime);
static void HandleEvents(void)
{
  int b;
  int key;
  XEvent event;
  qboolean dowarp = qfalse;
  char *p;
  int dx, dy;
  int t = 0; // default to 0 in case we don't set
	
  if (!dpy)
    return;

  while (XPending(dpy))
  {
    XNextEvent(dpy, &event);
    switch (event.type)
    {
    case KeyPress:
			t = Sys_XTimeToSysTime(event.xkey.time);
      p = XLateKey(&event.xkey, &key);
      if (key)
      {
        Sys_QueEvent( t, SE_KEY, key, qtrue, 0, NULL );
      }
      if (p)
      {
        while (*p)
        {
          Sys_QueEvent( t, SE_CHAR, *p++, 0, 0, NULL );
        }
      }
      break;

    case KeyRelease:
			t = Sys_XTimeToSysTime(event.xkey.time);
      // bk001206 - handle key repeat w/o XAutRepatOn/Off
      //            also: not done if console/menu is active.
      // From Ryan's Fakk2.
      // see game/q_shared.h, KEYCATCH_* . 0 == in 3d game.  
      if (cls.keyCatchers == 0)
      {   // FIXME: KEYCATCH_NONE
        if (repeated_press(&event) == qtrue)
          continue;
      } // if
      XLateKey(&event.xkey, &key);

      Sys_QueEvent( t, SE_KEY, key, qfalse, 0, NULL );
      break;

    case MotionNotify:
			t = Sys_XTimeToSysTime(event.xkey.time);
      if (mouse_active)
      {
        if (in_dgamouse->value)
        {
          if (abs(event.xmotion.x_root) > 1)
            mx += event.xmotion.x_root * 2;
          else
            mx += event.xmotion.x_root;
          if (abs(event.xmotion.y_root) > 1)
            my += event.xmotion.y_root * 2;
          else
            my += event.xmotion.y_root;
          if (t - mouseResetTime > MOUSE_RESET_DELAY )
          {
            Sys_QueEvent( t, SE_MOUSE, mx, my, 0, NULL );
          }
          mx = my = 0;
        } else
        {
          // If it's a center motion, we've just returned from our warp
          if (event.xmotion.x == glConfig.vidWidth/2 &&
              event.xmotion.y == glConfig.vidHeight/2)
          {
            mwx = glConfig.vidWidth/2;
            mwy = glConfig.vidHeight/2;
            if (t - mouseResetTime > MOUSE_RESET_DELAY )
            {
              Sys_QueEvent( t, SE_MOUSE, mx, my, 0, NULL );
            }
            mx = my = 0;
            break;
          }

          dx = ((int)event.xmotion.x - mwx);
          dy = ((int)event.xmotion.y - mwy);
          if (abs(dx) > 1)
            mx += dx * 2;
          else
            mx += dx;
          if (abs(dy) > 1)
            my += dy * 2;
          else
            my += dy;

          mwx = event.xmotion.x;
          mwy = event.xmotion.y;
          dowarp = qtrue;
        }
      }
      break;

    case ButtonPress:
		  t = Sys_XTimeToSysTime(event.xkey.time);
      if (event.xbutton.button == 4)
      {
        Sys_QueEvent( t, SE_KEY, K_MWHEELUP, qtrue, 0, NULL );
      } else if (event.xbutton.button == 5)
      {
        Sys_QueEvent( t, SE_KEY, K_MWHEELDOWN, qtrue, 0, NULL );
      } else
      {
        // NOTE TTimo there seems to be a weird mapping for K_MOUSE1 K_MOUSE2 K_MOUSE3 ..
        b=-1;
        if (event.xbutton.button == 1)
        {
          b = 0; // K_MOUSE1
        } else if (event.xbutton.button == 2)
        {
          b = 2; // K_MOUSE3
        } else if (event.xbutton.button == 3)
        {
          b = 1; // K_MOUSE2
        } else if (event.xbutton.button == 6)
        {
          b = 3; // K_MOUSE4
        } else if (event.xbutton.button == 7)
        {
          b = 4; // K_MOUSE5
        };

        Sys_QueEvent( t, SE_KEY, K_MOUSE1 + b, qtrue, 0, NULL );
      }
      break;

    case ButtonRelease:
		  t = Sys_XTimeToSysTime(event.xkey.time);
      if (event.xbutton.button == 4)
      {
        Sys_QueEvent( t, SE_KEY, K_MWHEELUP, qfalse, 0, NULL );
      } else if (event.xbutton.button == 5)
      {
        Sys_QueEvent( t, SE_KEY, K_MWHEELDOWN, qfalse, 0, NULL );
      } else
      {
        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;
        } else if (event.xbutton.button == 6)
        {
          b = 3; // K_MOUSE4
        } else if (event.xbutton.button == 7)
        {
          b = 4; // K_MOUSE5
        };
        Sys_QueEvent( t, SE_KEY, K_MOUSE1 + b, qfalse, 0, NULL );
      }
      break;

    case CreateNotify :
      win_x = event.xcreatewindow.x;
      win_y = event.xcreatewindow.y;
      break;

    case ConfigureNotify :
      win_x = event.xconfigure.x;
      win_y = event.xconfigure.y;
      break;
    }
  }

  if (dowarp)
  {
    XWarpPointer(dpy,None,win,0,0,0,0, 
                 (glConfig.vidWidth/2),(glConfig.vidHeight/2));
  }
}

// NOTE TTimo for the tty console input, we didn't rely on those .. 
//   it's not very surprising actually cause they are not used otherwise
void KBD_Init(void)
{
}

void KBD_Close(void)
{
}

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

  if (!mouse_active)
  {
		if (!in_nograb->value)
      install_grabs();
		else if (in_dgamouse->value) // force dga mouse to 0 if using nograb
			ri.Cvar_Set("in_dgamouse", "0");
    mouse_active = qtrue;
  }
}

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

  if (mouse_active)
  {
		if (!in_nograb->value)
      uninstall_grabs();
		else if (in_dgamouse->value) // force dga mouse to 0 if using nograb
			ri.Cvar_Set("in_dgamouse", "0");
    mouse_active = qfalse;
  }
}
/*****************************************************************************/

/*
** GLimp_SetGamma
**
** This routine should only be called if glConfig.deviceSupportsGamma is TRUE
*/
void GLimp_SetGamma( unsigned char red[256], unsigned char green[256], unsigned char blue[256] )
{
  // NOTE TTimo we get the gamma value from cvar, because we can't work with the s_gammatable
  //   the API wasn't changed to avoid breaking other OSes
  float g = Cvar_Get("r_gamma", "1.0", 0)->value;
  XF86VidModeGamma gamma;
  assert(glConfig.deviceSupportsGamma);
  gamma.red = g;
  gamma.green = g;
  gamma.blue = g;
  XF86VidModeSetGamma(dpy, scrnum, &gamma);
}

/*
** GLimp_Shutdown
**
** This routine does all OS specific shutdown procedures for the OpenGL
** subsystem.  Under OpenGL this means NULLing out the current DC and
** HGLRC, deleting the rendering context, and releasing the DC acquired
** for the window.  The state structure is also nulled out.
**
*/
void GLimp_Shutdown( void )
{
  if (!ctx || !dpy)
    return;
  IN_DeactivateMouse();
  // bk001206 - replaced with H2/Fakk2 solution
  // XAutoRepeatOn(dpy);
  // autorepeaton = qfalse; // bk001130 - from cvs1.17 (mkv)
  if (dpy)
  {
    if (ctx)
      qglXDestroyContext(dpy, ctx);
    if (win)
      XDestroyWindow(dpy, win);
    if (vidmode_active)
      XF86VidModeSwitchToMode(dpy, scrnum, vidmodes[0]);
    if (glConfig.deviceSupportsGamma)
    {
      XF86VidModeSetGamma(dpy, scrnum, &vidmode_InitialGamma);
    }
    // NOTE TTimo opening/closing the display should be necessary only once per run
    //   but it seems QGL_Shutdown gets called in a lot of occasion
    //   in some cases, this XCloseDisplay is known to raise some X errors
    //   ( https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=33 )
    XCloseDisplay(dpy);
  }
  vidmode_active = qfalse;
  dpy = NULL;
  win = 0;
  ctx = NULL;

  memset( &glConfig, 0, sizeof( glConfig ) );
  memset( &glState, 0, sizeof( glState ) );

  QGL_Shutdown();
}

/*
** GLimp_LogComment
*/
void GLimp_LogComment( char *comment ) 
{
  if ( glw_state.log_fp )
  {
    fprintf( glw_state.log_fp, "%s", comment );
  }
}

/*
** GLW_StartDriverAndSetMode
*/
// bk001204 - prototype needed
int GLW_SetMode( const char *drivername, int mode, qboolean fullscreen );
static qboolean GLW_StartDriverAndSetMode( const char *drivername, 
                                           int mode, 
                                           qboolean fullscreen )
{
  rserr_t err;

  // don't ever bother going into fullscreen with a voodoo card
#if 1	// JDC: I reenabled this
  if ( Q_stristr( drivername, "Voodoo" ) )
  {
    ri.Cvar_Set( "r_fullscreen", "0" );
    r_fullscreen->modified = qfalse;
    fullscreen = qfalse;
  }
#endif
	
	if (fullscreen && in_nograb->value)
	{
		ri.Printf( PRINT_ALL, "Fullscreen not allowed with in_nograb 1\n");
    ri.Cvar_Set( "r_fullscreen", "0" );
    r_fullscreen->modified = qfalse;
    fullscreen = qfalse;		
	}

  err = GLW_SetMode( drivername, mode, fullscreen );

  switch ( err )
  {
  case RSERR_INVALID_FULLSCREEN:
    ri.Printf( PRINT_ALL, "...WARNING: fullscreen unavailable in this mode\n" );
    return qfalse;
  case RSERR_INVALID_MODE:
    ri.Printf( PRINT_ALL, "...WARNING: could not set the given mode (%d)\n", mode );
    return qfalse;
  default:
    break;
  }
  return qtrue;
}

/*
** GLW_SetMode
*/
int GLW_SetMode( const char *drivername, int mode, qboolean fullscreen )
{
  int attrib[] = {
    GLX_RGBA,         // 0
    GLX_RED_SIZE, 4,      // 1, 2
    GLX_GREEN_SIZE, 4,      // 3, 4
    GLX_BLUE_SIZE, 4,     // 5, 6
    GLX_DOUBLEBUFFER,     // 7
    GLX_DEPTH_SIZE, 1,      // 8, 9
    GLX_STENCIL_SIZE, 1,    // 10, 11
    None
  };
  // these match in the array
#define ATTR_RED_IDX 2
#define ATTR_GREEN_IDX 4
#define ATTR_BLUE_IDX 6
#define ATTR_DEPTH_IDX 9
#define ATTR_STENCIL_IDX 11
  Window root;
  XVisualInfo *visinfo;
  XSetWindowAttributes attr;
  XSizeHints sizehints;
  unsigned long mask;
  int colorbits, depthbits, stencilbits;
  int tcolorbits, tdepthbits, tstencilbits;