gl_glx.c

Quake 2 Source code for students by Theerthan You can also download from idsoftwares.com

/*
Copyright (C) 1997-2001 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
/*
** GLW_IMP.C
**
** This file contains ALL Linux specific stuff having to do with the
** OpenGL refresh.  When a port is being made the following functions
** must be implemented by the port:
**
** GLimp_EndFrame
** GLimp_Init
** GLimp_Shutdown
** GLimp_SwitchFullscreen
**
*/

#include <termios.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/vt.h>
#include <stdarg.h>
#include <stdio.h>
#include <signal.h>

#include "../ref_gl/gl_local.h"

#include "../client/keys.h"

#include "../linux/rw_linux.h"
#include "../linux/glw_linux.h"

#include <GL/glx.h>

#include <X11/keysym.h>
#include <X11/cursorfont.h>

#include <X11/extensions/xf86dga.h>
#include <X11/extensions/xf86vmode.h>

glwstate_t glw_state;

static Display *dpy = NULL;
static int scrnum;
static Window win;
static GLXContext ctx = NULL;

#define KEY_MASK (KeyPressMask | KeyReleaseMask)
#define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
		    PointerMotionMask | ButtonMotionMask )
#define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | StructureNotifyMask )

/*****************************************************************************/
/* MOUSE                                                                     */
/*****************************************************************************/

// this is inside the renderer shared lib, so these are called from vid_so

static qboolean        mouse_avail;
static int   mx, my;
static int	old_mouse_x, old_mouse_y;

static int win_x, win_y;

static cvar_t	*m_filter;
static cvar_t	*in_mouse;
static cvar_t	*in_dgamouse;

static cvar_t	*r_fakeFullscreen;

static XF86VidModeModeInfo **vidmodes;
static int default_dotclock_vidmode;
static int num_vidmodes;
static qboolean vidmode_active = false;

static qboolean	mlooking;

static qboolean mouse_active = false;
static qboolean dgamouse = false;
static qboolean vidmode_ext = false;

// state struct passed in Init
static in_state_t	*in_state;

static cvar_t *sensitivity;
static cvar_t *lookstrafe;
static cvar_t *m_side;
static cvar_t *m_yaw;
static cvar_t *m_pitch;
static cvar_t *m_forward;
static cvar_t *freelook;

static Cursor CreateNullCursor(Display *display, Window root)
{
    Pixmap cursormask; 
    XGCValues xgc;
    GC gc;
    XColor dummycolour;
    Cursor cursor;

    cursormask = XCreatePixmap(display, root, 1, 1, 1/*depth*/);
    xgc.function = GXclear;
    gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
    XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
    dummycolour.pixel = 0;
    dummycolour.red = 0;
    dummycolour.flags = 04;
    cursor = XCreatePixmapCursor(display, cursormask, cursormask,
          &dummycolour,&dummycolour, 0,0);
    XFreePixmap(display,cursormask);
    XFreeGC(display,gc);
    return cursor;
}

static void install_grabs(void)
{

// inviso cursor
	XDefineCursor(dpy, win, CreateNullCursor(dpy, win));

	XGrabPointer(dpy, win,
				 True,
				 0,
				 GrabModeAsync, GrabModeAsync,
				 win,
				 None,
				 CurrentTime);

	if (in_dgamouse->value) {
		int MajorVersion, MinorVersion;

		if (!XF86DGAQueryVersion(dpy, &MajorVersion, &MinorVersion)) { 
			// unable to query, probalby not supported
			ri.Con_Printf( PRINT_ALL, "Failed to detect XF86DGA Mouse\n" );
			ri.Cvar_Set( "in_dgamouse", "0" );
		} else {
			dgamouse = true;
			XF86DGADirectVideo(dpy, DefaultScreen(dpy), XF86DGADirectMouse);
			XWarpPointer(dpy, None, win, 0, 0, 0, 0, 0, 0);
		}
	} else {
		XWarpPointer(dpy, None, win,
					 0, 0, 0, 0,
					 vid.width / 2, vid.height / 2);
	}

	XGrabKeyboard(dpy, win,
				  False,
				  GrabModeAsync, GrabModeAsync,
				  CurrentTime);

	mouse_active = true;

//	XSync(dpy, True);
}

static void uninstall_grabs(void)
{
	if (!dpy || !win)
		return;

	if (dgamouse) {
		dgamouse = false;
		XF86DGADirectVideo(dpy, DefaultScreen(dpy), 0);
	}

	XUngrabPointer(dpy, CurrentTime);
	XUngrabKeyboard(dpy, CurrentTime);

// inviso cursor
	XUndefineCursor(dpy, win);

	mouse_active = false;
}

static void Force_CenterView_f (void)
{
	in_state->viewangles[PITCH] = 0;
}

static void RW_IN_MLookDown (void) 
{ 
	mlooking = true; 
}

static void RW_IN_MLookUp (void) 
{
	mlooking = false;
	in_state->IN_CenterView_fp ();
}

void RW_IN_Init(in_state_t *in_state_p)
{
	int mtype;
	int i;

	in_state = in_state_p;

	// mouse variables
	m_filter = ri.Cvar_Get ("m_filter", "0", 0);
    in_mouse = ri.Cvar_Get ("in_mouse", "1", CVAR_ARCHIVE);
    in_dgamouse = ri.Cvar_Get ("in_dgamouse", "1", CVAR_ARCHIVE);
	freelook = ri.Cvar_Get( "freelook", "0", 0 );
	lookstrafe = ri.Cvar_Get ("lookstrafe", "0", 0);
	sensitivity = ri.Cvar_Get ("sensitivity", "3", 0);
	m_pitch = ri.Cvar_Get ("m_pitch", "0.022", 0);
	m_yaw = ri.Cvar_Get ("m_yaw", "0.022", 0);
	m_forward = ri.Cvar_Get ("m_forward", "1", 0);
	m_side = ri.Cvar_Get ("m_side", "0.8", 0);

	ri.Cmd_AddCommand ("+mlook", RW_IN_MLookDown);
	ri.Cmd_AddCommand ("-mlook", RW_IN_MLookUp);

	ri.Cmd_AddCommand ("force_centerview", Force_CenterView_f);

	mx = my = 0.0;
	mouse_avail = true;
}

void RW_IN_Shutdown(void)
{
	mouse_avail = false;
}

/*
===========
IN_Commands
===========
*/
void RW_IN_Commands (void)
{
}

/*
===========
IN_Move
===========
*/
void RW_IN_Move (usercmd_t *cmd)
{
	if (!mouse_avail)
		return;
   
	if (m_filter->value)
	{
		mx = (mx + old_mouse_x) * 0.5;
		my = (my + old_mouse_y) * 0.5;
	}

	old_mouse_x = mx;
	old_mouse_y = my;

	mx *= sensitivity->value;
	my *= sensitivity->value;

// add mouse X/Y movement to cmd
	if ( (*in_state->in_strafe_state & 1) || 
		(lookstrafe->value && mlooking ))
		cmd->sidemove += m_side->value * mx;
	else
		in_state->viewangles[YAW] -= m_yaw->value * mx;

	if ( (mlooking || freelook->value) && 
		!(*in_state->in_strafe_state & 1))
	{
		in_state->viewangles[PITCH] += m_pitch->value * my;
	}
	else
	{
		cmd->forwardmove -= m_forward->value * my;
	}

	mx = my = 0;
}

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

	if (mouse_active) {
		uninstall_grabs();
		mouse_active = false;
	}
}

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

	if (!mouse_active) {
		mx = my = 0; // don't spazz
		install_grabs();
		mouse_active = true;
	}
}

void RW_IN_Frame (void)
{
}

void RW_IN_Activate(qboolean active)
{
	if (active || vidmode_active)
		IN_ActivateMouse();
	else
		IN_DeactivateMouse ();
}

/*****************************************************************************/
/* KEYBOARD                                                                  */
/*****************************************************************************/

static int XLateKey(XKeyEvent *ev)
{

	int key;
	char buf[64];
	KeySym keysym;

	key = 0;

	XLookupString(ev, buf, sizeof buf, &keysym, 0);

	switch(keysym)
	{
		case XK_KP_Page_Up:	 key = K_KP_PGUP; break;
		case XK_Page_Up:	 key = K_PGUP; break;

		case XK_KP_Page_Down: key = K_KP_PGDN; break;
		case XK_Page_Down:	 key = K_PGDN; break;

		case XK_KP_Home: key = K_KP_HOME; break;
		case XK_Home:	 key = K_HOME; break;

		case XK_KP_End:  key = K_KP_END; break;
		case XK_End:	 key = K_END; break;

		case XK_KP_Left: key = K_KP_LEFTARROW; break;
		case XK_Left:	 key = K_LEFTARROW; break;

		case XK_KP_Right: key = K_KP_RIGHTARROW; break;
		case XK_Right:	key = K_RIGHTARROW;		break;

		case XK_KP_Down: key = K_KP_DOWNARROW; break;
		case XK_Down:	 key = K_DOWNARROW; break;

		case XK_KP_Up:   key = K_KP_UPARROW; break;
		case XK_Up:		 key = K_UPARROW;	 break;

		case XK_Escape: key = K_ESCAPE;		break;

		case XK_KP_Enter: key = K_KP_ENTER;	break;
		case XK_Return: key = K_ENTER;		 break;

		case XK_Tab:		key = K_TAB;			 break;

		case XK_F1:		 key = K_F1;				break;

		case XK_F2:		 key = K_F2;				break;

		case XK_F3:		 key = K_F3;				break;

		case XK_F4:		 key = K_F4;				break;

		case XK_F5:		 key = K_F5;				break;

		case XK_F6:		 key = K_F6;				break;

		case XK_F7:		 key = K_F7;				break;

		case XK_F8:		 key = K_F8;				break;

		case XK_F9:		 key = K_F9;				break;

		case XK_F10:		key = K_F10;			 break;

		case XK_F11:		key = K_F11;			 break;

		case XK_F12:		key = K_F12;			 break;

		case XK_BackSpace: key = K_BACKSPACE; break;

		case XK_KP_Delete: key = K_KP_DEL; break;
		case XK_Delete: key = K_DEL; break;

		case XK_Pause:	key = K_PAUSE;		 break;

		case XK_Shift_L:
		case XK_Shift_R:	key = K_SHIFT;		break;

		case XK_Execute: 
		case XK_Control_L: 
		case XK_Control_R:	key = K_CTRL;		 break;

		case XK_Alt_L:	
		case XK_Meta_L: 
		case XK_Alt_R:	
		case XK_Meta_R: key = K_ALT;			break;

		case XK_KP_Begin: key = K_KP_5;	break;