gl_glx.c

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

		case XK_Insert:key = K_INS; break;
		case XK_KP_Insert: key = K_KP_INS; break;

		case XK_KP_Multiply: key = '*'; break;
		case XK_KP_Add:  key = K_KP_PLUS; break;
		case XK_KP_Subtract: key = K_KP_MINUS; break;
		case XK_KP_Divide: key = K_KP_SLASH; break;

#if 0
		case 0x021: key = '1';break;/* [!] */
		case 0x040: key = '2';break;/* [@] */
		case 0x023: key = '3';break;/* [#] */
		case 0x024: key = '4';break;/* [$] */
		case 0x025: key = '5';break;/* [%] */
		case 0x05e: key = '6';break;/* [^] */
		case 0x026: key = '7';break;/* [&] */
		case 0x02a: key = '8';break;/* [*] */
		case 0x028: key = '9';;break;/* [(] */
		case 0x029: key = '0';break;/* [)] */
		case 0x05f: key = '-';break;/* [_] */
		case 0x02b: key = '=';break;/* [+] */
		case 0x07c: key = '\'';break;/* [|] */
		case 0x07d: key = '[';break;/* [}] */
		case 0x07b: key = ']';break;/* [{] */
		case 0x022: key = '\'';break;/* ["] */
		case 0x03a: key = ';';break;/* [:] */
		case 0x03f: key = '/';break;/* [?] */
		case 0x03e: key = '.';break;/* [>] */
		case 0x03c: key = ',';break;/* [<] */
#endif

		default:
			key = *(unsigned char*)buf;
			if (key >= 'A' && key <= 'Z')
				key = key - 'A' + 'a';
			break;
	} 

	return key;
}


static void HandleEvents(void)
{
	XEvent event;
	int b;
	qboolean dowarp = false;
	int mwx = vid.width/2;
	int mwy = vid.height/2;
   
	if (!dpy)
		return;

	while (XPending(dpy)) {

		XNextEvent(dpy, &event);

		switch(event.type) {
		case KeyPress:
		case KeyRelease:
			if (in_state && in_state->Key_Event_fp)
				in_state->Key_Event_fp (XLateKey(&event.xkey), event.type == KeyPress);
			break;

		case MotionNotify:
			if (mouse_active) {
				if (dgamouse) {
					mx += (event.xmotion.x + win_x) * 2;
					my += (event.xmotion.y + win_y) * 2;
				} 
				else 
				{
					mx += ((int)event.xmotion.x - mwx) * 2;
					my += ((int)event.xmotion.y - mwy) * 2;
					mwx = event.xmotion.x;
					mwy = event.xmotion.y;

					if (mx || my)
						dowarp = true;
				}
			}
			break;


		case ButtonPress:
			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;
			if (b>=0 && in_state && in_state->Key_Event_fp)
				in_state->Key_Event_fp (K_MOUSE1 + b, true);
			break;

		case ButtonRelease:
			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;
			if (b>=0 && in_state && in_state->Key_Event_fp)
				in_state->Key_Event_fp (K_MOUSE1 + b, false);
			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) {
		/* move the mouse to the window center again */
		XWarpPointer(dpy,None,win,0,0,0,0, vid.width/2,vid.height/2);
	}
}

Key_Event_fp_t Key_Event_fp;

void KBD_Init(Key_Event_fp_t fp)
{
	Key_Event_fp = fp;
}

void KBD_Update(void)
{
// get events from x server
	HandleEvents();
}

void KBD_Close(void)
{
}

/*****************************************************************************/

static qboolean GLimp_SwitchFullscreen( int width, int height );
qboolean GLimp_InitGL (void);

static void signal_handler(int sig)
{
	printf("Received signal %d, exiting...\n", sig);
	GLimp_Shutdown();
	_exit(0);
}

static void InitSig(void)
{
	signal(SIGHUP, signal_handler);
	signal(SIGQUIT, signal_handler);
	signal(SIGILL, signal_handler);
	signal(SIGTRAP, signal_handler);
	signal(SIGIOT, signal_handler);
	signal(SIGBUS, signal_handler);
	signal(SIGFPE, signal_handler);
	signal(SIGSEGV, signal_handler);
	signal(SIGTERM, signal_handler);
}

/*
** GLimp_SetMode
*/
int GLimp_SetMode( int *pwidth, int *pheight, int mode, qboolean fullscreen )
{
	int width, height;
	int attrib[] = {
		GLX_RGBA,
		GLX_RED_SIZE, 1,
		GLX_GREEN_SIZE, 1,
		GLX_BLUE_SIZE, 1,
		GLX_DOUBLEBUFFER,
		GLX_DEPTH_SIZE, 1,
		None
	};
	Window root;
	XVisualInfo *visinfo;
	XSetWindowAttributes attr;
	unsigned long mask;
	int MajorVersion, MinorVersion;
	int actualWidth, actualHeight;
	int i;

	r_fakeFullscreen = ri.Cvar_Get( "r_fakeFullscreen", "0", CVAR_ARCHIVE);

	ri.Con_Printf( PRINT_ALL, "Initializing OpenGL display\n");

	if (fullscreen)
		ri.Con_Printf (PRINT_ALL, "...setting fullscreen mode %d:", mode );
	else
		ri.Con_Printf (PRINT_ALL, "...setting mode %d:", mode );

	if ( !ri.Vid_GetModeInfo( &width, &height, mode ) )
	{
		ri.Con_Printf( PRINT_ALL, " invalid mode\n" );
		return rserr_invalid_mode;
	}

	ri.Con_Printf( PRINT_ALL, " %d %d\n", width, height );

	// destroy the existing window
	GLimp_Shutdown ();

	// Mesa VooDoo hacks
	if (fullscreen)
		putenv("MESA_GLX_FX=fullscreen");
	else
		putenv("MESA_GLX_FX=window");

	if (!(dpy = XOpenDisplay(NULL))) {
		fprintf(stderr, "Error couldn't open the X display\n");
		return rserr_invalid_mode;
	}

	scrnum = DefaultScreen(dpy);
	root = RootWindow(dpy, scrnum);

	// Get video mode list
	MajorVersion = MinorVersion = 0;
	if (!XF86VidModeQueryVersion(dpy, &MajorVersion, &MinorVersion)) { 
		vidmode_ext = false;
	} else {
		ri.Con_Printf(PRINT_ALL, "Using XFree86-VidModeExtension Version %d.%d\n",
			MajorVersion, MinorVersion);
		vidmode_ext = true;
	}

	visinfo = qglXChooseVisual(dpy, scrnum, attrib);
	if (!visinfo) {
		fprintf(stderr, "Error couldn't get an RGB, Double-buffered, Depth visual\n");
		return rserr_invalid_mode;
	}

	if (vidmode_ext) {
		int best_fit, best_dist, dist, x, y;
		
		XF86VidModeGetAllModeLines(dpy, scrnum, &num_vidmodes, &vidmodes);

		// Are we going fullscreen?  If so, let's change video mode
		if (fullscreen && !r_fakeFullscreen->value) {
			best_dist = 9999999;
			best_fit = -1;

			for (i = 0; i < num_vidmodes; i++) {
				if (width > vidmodes[i]->hdisplay ||
					height > vidmodes[i]->vdisplay)
					continue;

				x = width - vidmodes[i]->hdisplay;
				y = height - vidmodes[i]->vdisplay;
				dist = (x * x) + (y * y);
				if (dist < best_dist) {
					best_dist = dist;
					best_fit = i;
				}
			}

			if (best_fit != -1) {
				actualWidth = vidmodes[best_fit]->hdisplay;
				actualHeight = vidmodes[best_fit]->vdisplay;

				// change to the mode
				XF86VidModeSwitchToMode(dpy, scrnum, vidmodes[best_fit]);
				vidmode_active = true;

				// Move the viewport to top left
				XF86VidModeSetViewPort(dpy, scrnum, 0, 0);
			} else
				fullscreen = 0;
		}
	}

	/* window attributes */
	attr.background_pixel = 0;
	attr.border_pixel = 0;
	attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
	attr.event_mask = X_MASK;
	if (vidmode_active) {
		mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | 
			CWEventMask | CWOverrideRedirect;
		attr.override_redirect = True;
		attr.backing_store = NotUseful;
		attr.save_under = False;
	} else
		mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;

	win = XCreateWindow(dpy, root, 0, 0, width, height,
						0, visinfo->depth, InputOutput,
						visinfo->visual, mask, &attr);
	XMapWindow(dpy, win);

	if (vidmode_active) {
		XMoveWindow(dpy, win, 0, 0);
		XRaiseWindow(dpy, win);
		XWarpPointer(dpy, None, win, 0, 0, 0, 0, 0, 0);
		XFlush(dpy);
		// Move the viewport to top left
		XF86VidModeSetViewPort(dpy, scrnum, 0, 0);
	}

	XFlush(dpy);

	ctx = qglXCreateContext(dpy, visinfo, NULL, True);

	qglXMakeCurrent(dpy, win, ctx);

	*pwidth = width;
	*pheight = height;

	// let the sound and input subsystems know about the new window
	ri.Vid_NewWindow (width, height);

	qglXMakeCurrent(dpy, win, ctx);

	return rserr_ok;
}

/*
** 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 )
{
	uninstall_grabs();
	mouse_active = false;
	dgamouse = false;

	if (dpy) {
		if (ctx)
			qglXDestroyContext(dpy, ctx);
		if (win)
			XDestroyWindow(dpy, win);
		if (vidmode_active)
			XF86VidModeSwitchToMode(dpy, scrnum, vidmodes[0]);
		XCloseDisplay(dpy);
	}
	ctx = NULL;
	dpy = NULL;
	win = 0;
	ctx = NULL;
}

/*
** GLimp_Init
**
** This routine is responsible for initializing the OS specific portions
** of OpenGL.  
*/
int GLimp_Init( void *hinstance, void *wndproc )
{
	InitSig();

	return true;
}

/*
** GLimp_BeginFrame
*/
void GLimp_BeginFrame( float camera_seperation )
{
}

/*
** GLimp_EndFrame
** 
** Responsible for doing a swapbuffers and possibly for other stuff
** as yet to be determined.  Probably better not to make this a GLimp
** function and instead do a call to GLimp_SwapBuffers.
*/
void GLimp_EndFrame (void)
{
	qglFlush();
	qglXSwapBuffers(dpy, win);
}

/*
** GLimp_AppActivate
*/
void GLimp_AppActivate( qboolean active )
{
}

void Fake_glColorTableEXT( GLenum target, GLenum internalformat,
                             GLsizei width, GLenum format, GLenum type,
                             const GLvoid *table )
{
	byte temptable[256][4];
	byte *intbl;
	int i;

	for (intbl = (byte *)table, i = 0; i < 256; i++) {
		temptable[i][2] = *intbl++;
		temptable[i][1] = *intbl++;
		temptable[i][0] = *intbl++;
		temptable[i][3] = 255;
	}
	qgl3DfxSetPaletteEXT((GLuint *)temptable);
}


/*------------------------------------------------*/
/* X11 Input Stuff
/*------------------------------------------------*/