Default to building with GDI

Add setwinsize and setwinpos
Move blit from rect into gdi_thread
Add beep support
Add (non-functional) settitle support
Support ciolib scaling in addition to GDI scaling
Add window-size snapping
Support -iG in SyncTERM

GDI is still the second-least preferred mode, so auto mode will only
use it if the windows console somehow fails.  But at least people
can play with it.

src/conio/Common.gmake

@@ -63,7 +63,7 @@ ifneq ($(os),win32)
 else
  NO_X			 :=  1
  CIOLIB-MT_CFLAGS        +=  -DDISABLE_X11=1
- ifdef WITH_GDI
+ ifndef WITHOUT_GDI
   CIOLIB-MT_LIBS += -lgdi32
   CIOLIB-MT_CFLAGS += -DWITH_GDI
  endif

src/conio/GNUmakefile

@@ -5,7 +5,7 @@ include $(SRC_ROOT)/build/Common.gmake	# defines clean and output directory rule
 CFLAGS += $(XPDEV-MT_CFLAGS) $(HASH_CFLAGS) $(ENCODE_CFLAGS) $(CIOLIB-MT_CFLAGS)
 
 ifeq ($(os),win32)
- ifdef WITH_GDI
+ ifndef WITHOUT_GDI
   OBJS	+=	$(MTOBJODIR)$(DIRSEP)win32gdi$(OFILE)
  endif
  OBJS	+=	$(MTOBJODIR)$(DIRSEP)SDL_win32_main$(OFILE)

src/conio/ciolib.c

@@ -177,9 +177,6 @@ static int try_gdi_init(int mode)
 		cio_api.kbhit=gdi_kbhit;
 		cio_api.getch=gdi_getch;
 		cio_api.textmode=gdi_textmode;
-		cio_api.showmouse=gdi_showmouse;
-		cio_api.hidemouse=gdi_hidemouse;
-		cio_api.setname=gdi_setname;
 		cio_api.seticon=gdi_seticon;
 		cio_api.settitle=gdi_settitle;
 		cio_api.copytext=gdi_copytext;
@@ -459,9 +456,6 @@ CIOLIBEXPORT int initciolib(int mode)
 #ifndef NO_X
 			if(!try_x_init(mode))
 #endif
-#if defined(WITH_GDI)
-			if (!try_gdi_init(mode))
-#endif
 #if defined(WITH_SDL)
 				if(!try_sdl_init(CIOLIB_MODE_SDL))
 #endif
@@ -470,7 +464,10 @@ CIOLIBEXPORT int initciolib(int mode)
 #else
 					if(!try_curses_init(mode))
 #endif
-						try_ansi_init(mode);
+#if defined(WITH_GDI)
+						if (!try_gdi_init(mode))
+#endif
+							try_ansi_init(mode);
 			break;
 #ifdef _WIN32
 		case CIOLIB_MODE_CONIO:
@@ -500,6 +497,12 @@ CIOLIBEXPORT int initciolib(int mode)
 			try_sdl_init(mode);
 			break;
 #endif
+
+#if defined(WITH_GDI)
+		case CIOLIB_MODE_GDI:
+			try_gdi_init(mode);
+			break;
+#endif
 	}
 	if(cio_api.mode==CIOLIB_MODE_AUTO) {
 		fprintf(stderr,"CIOLIB initialization failed!\n");

src/conio/scale.c

@@ -212,6 +212,19 @@ release_buffer(struct graphics_buffer *buf)
 	free_list = buf;
 }
 
+void
+calc_scaling_factors(int *x, int *y, int winwidth, int winheight, int aspect_width, int aspect_height, int scrnwidth, int scrnheight)
+{
+	aspect_fix_low(&winwidth, &winheight, aspect_width, aspect_height);
+	aspect_reverse(&winwidth, &winheight, scrnwidth, scrnheight, aspect_width, aspect_height);
+	*x = winwidth / scrnwidth;
+	*y = winheight / scrnheight;
+	if (*x < 1 || *x > 14)
+		*x = 1;
+	if (*y < 1 || *y > 14)
+		*y = 1;
+}
+
 struct graphics_buffer *
 do_scale(struct rectlist* rect, int xscale, int yscale, int aspect_width, int aspect_height)
 {

src/conio/scale.h

@@ -20,3 +20,4 @@ void aspect_correct(int *x, int *y, int aspect_width, int aspect_height);
 void aspect_reverse(int *x, int *y, int scrnwidth, int scrnheight, int aspect_width, int aspect_height);
 void aspect_fix(int *x, int *y, int aspect_width, int aspect_height);
 void aspect_fix_low(int *x, int *y, int aspect_width, int aspect_height);
+void calc_scaling_factors(int *x, int *y, int winwidth, int winheight, int aspect_width, int aspect_height, int scrnwidth, int scrnheight);

src/conio/sdl_con.c

@@ -352,16 +352,7 @@ window_can_scale_internally(struct video_stats *vs)
 static void
 internal_scaling_factors(int *x, int *y, struct video_stats *vs)
 {
-	int winwidth = vs->winwidth;
-	int winheight = vs->winheight;
-	aspect_fix_low(&winwidth, &winheight, vs->aspect_width, vs->aspect_height);
-	aspect_reverse(&winwidth, &winheight, vs->scrnwidth, vs->scrnheight, vs->aspect_width, vs->aspect_height);
-	*x = winwidth / vs->scrnwidth;
-	*y = winheight / vs->scrnheight;
-	if (*x < 1 || *x > 14)
-		*x = 1;
-	if (*y < 1 || *y > 14)
-		*y = 1;
+	calc_scaling_factors(x, y, vs->winwidth, vs->winheight, vs->aspect_width, vs->aspect_height, vs->scrnwidth, vs->scrnheight);
 }
 
 static int sdl_init_mode(int mode)

src/conio/win32gdi.c

 #include <windows.h>
+
+#include <math.h>
 #include <stdbool.h>
 #include <stdio.h>
 
@@ -11,8 +13,10 @@
 static HWND win;
 static HANDLE rch;
 static HANDLE wch;
-
+static bool maximized = false;
 static uint8_t *title;
+static uint16_t winxpos, winypos;
+static const DWORD style = WS_OVERLAPPEDWINDOW | WS_VISIBLE;
 
 #define WM_USER_INVALIDATE WM_USER
 #define WM_USER_SETSIZE (WM_USER + 1)
@@ -42,7 +46,9 @@ static struct rectlist *update_list_tail = NULL;
 static struct rectlist *last = NULL;
 static struct rectlist *next = NULL;
 static pthread_mutex_t gdi_headlock;
+static pthread_mutex_t winpos_lock;
 static pthread_mutex_t rect_lock;
+static bool ciolib_scaling = false;
 
 // Internal implementation
 
@@ -50,6 +56,7 @@ static struct rectlist *
 get_rect(void)
 {
 	struct rectlist *ret;
+
 	pthread_mutex_lock(&rect_lock);
 	if (next != NULL) {
 		if (last != NULL)
@@ -104,69 +111,246 @@ sp_to_codepoint(uint16_t high, uint16_t low)
 	return (high - 0xd800) * 0x400 + (low - 0xdc00) + 0x10000;
 }
 
-static LRESULT CALLBACK
-gdi_WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
+// vstatlock must be held
+static void
+set_ciolib_scaling(void)
+{
+	int w, h;
+	int fw, fh;
+
+	w = vstat.winwidth;
+	h = vstat.winheight;
+	aspect_fix_low(&w, &h, vstat.aspect_width, vstat.aspect_height);
+	fw = w;
+	fh = h;
+	aspect_reverse(&w, &h, vstat.scrnwidth, vstat.scrnheight, vstat.aspect_width, vstat.aspect_height);
+	if ((fw == w) || (fh == h)) {
+		if (fw > vstat.winwidth || fh > vstat.winheight)
+			ciolib_scaling = false;
+		else
+			ciolib_scaling = true;
+	}
+	else
+		ciolib_scaling = false;
+}
+
+static bool
+UnadjustWindowSize(int *w, int *h)
+{
+	RECT r = {0};
+	bool ret;
+
+	ret = AdjustWindowRect(&r, style, FALSE);
+	if (ret) {
+		w += r.left - r.right;
+		h += r.top - r.bottom;
+	}
+	return ret;
+}
+
+static LRESULT
+gdi_handle_wm_size(WPARAM wParam, LPARAM lParam)
+{
+	RECT r;
+	int w, h;
+
+	switch (wParam) {
+		case SIZE_MAXIMIZED:
+			maximized = true;
+			break;
+		case SIZE_MINIMIZED:
+		case SIZE_RESTORED:
+			maximized = false;
+			break;
+	}
+	if (wParam == SIZE_MINIMIZED)
+		return 0;
+	w = lParam & 0xffff;
+	h = (lParam >> 16) & 0xffff;
+	UnadjustWindowSize(&w, &h);
+	pthread_mutex_lock(&vstatlock);
+	vstat.winwidth = w;
+	vstat.winheight = h;
+	set_ciolib_scaling();
+	pthread_mutex_unlock(&vstatlock);
+
+	return 0;
+}
+
+static LRESULT
+gdi_handle_wm_paint(HWND hwnd)
+{
+	static HDC memDC = NULL;
+
 	PAINTSTRUCT ps;
+	struct rectlist *list;
 	HBITMAP di;
-	static HDC memDC = NULL;
-	WPARAM highpair;
+	HDC winDC;
+	int w,h;
+	int aw,ah;
+	int sw,sh;
+	int xscale, yscale;
+	struct graphics_buffer *gb;
+	void *data;
+
+	list = get_rect();
+	if (list == NULL)
+		return 0;
+	pthread_mutex_lock(&vstatlock);
+	w = vstat.winwidth;
+	h = vstat.winheight;
+	aw = vstat.aspect_width;
+	ah = vstat.aspect_height;
+	sw = vstat.scrnwidth;
+	sh = vstat.scrnheight;
+	pthread_mutex_unlock(&vstatlock);
+	if (ciolib_scaling) {
+		calc_scaling_factors(&xscale, &yscale, w, h, aw, ah, sw, sh);
+		gb = do_scale(list, xscale, yscale, aw, ah);
+		b5hdr.bV5Width = gb->w;
+		b5hdr.bV5Height = -gb->h;
+		b5hdr.bV5SizeImage = gb->w * gb->h * 4;
+		data = gb->data;
+	}
+	else {
+		b5hdr.bV5Width = list->rect.width;
+		b5hdr.bV5Height = -list->rect.height;
+		b5hdr.bV5SizeImage = list->rect.width * list->rect.height * 4;
+		data = list->data;
+	}
+	winDC = BeginPaint(hwnd, &ps);
+	if (memDC == NULL)
+		memDC = CreateCompatibleDC(winDC);
+	// Scale...
+	di = CreateDIBitmap(winDC, (BITMAPINFOHEADER *)&b5hdr, CBM_INIT, data, (BITMAPINFO *)&b5hdr, 0/*DIB_RGB_COLORS*/);
+	di = SelectObject(memDC, di);
+	if (ciolib_scaling) {
+		BitBlt(winDC, 0, 0, w, h, memDC, 0, 0, SRCCOPY);
+	}
+	else {
+		StretchBlt(winDC, 0, 0, w, h, memDC, 0, 0, list->rect.width, list->rect.height, SRCCOPY);
+	}
+	EndPaint(hwnd, &ps);
+	di = SelectObject(memDC, di);
+	DeleteObject(di);
+	if (ciolib_scaling) {
+		release_buffer(gb);
+	}
+	return 0;
+}
+
+static LRESULT
+gdi_handle_wm_char(WPARAM wParam, LPARAM lParam)
+{
+	static WPARAM highpair;
 	uint32_t cp;
 	uint8_t ch;
 	uint16_t repeat;
 	uint16_t i;
 	bool alt;
-	HDC winDC;
-	struct rectlist *list;
-	int w,h;
 
+	repeat = lParam & 0xffff;
+	alt = lParam & (1 << 29);
+	if (IS_HIGH_SURROGATE(wParam)) {
+		highpair = wParam;
+		return 0;
+	}
+	else if (IS_LOW_SURROGATE(wParam)) {
+		cp = sp_to_codepoint(highpair, wParam);
+	}
+	else {
+		cp = wParam;
+	}
+	// Translate from unicode to codepage...
+	ch = cpchar_from_unicode_cpoint(getcodepage(), cp, 0);
+	if (ch) {
+		for (i = 0; i < repeat; i++)
+			add_key(ch);
+	}
+	return 0;
+}
+
+static LRESULT CALLBACK
+gdi_WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
 	switch(msg) {
 		case WM_PAINT:
-			list = get_rect();
-			if (list == NULL)
-				return 0;
-			winDC = BeginPaint(hwnd, &ps);
-			if (memDC == NULL)
-				memDC = CreateCompatibleDC(winDC);
-			b5hdr.bV5Width = list->rect.width;
-			b5hdr.bV5Height = -list->rect.height;
-			b5hdr.bV5SizeImage = list->rect.width * list->rect.height * 4;
-			di = CreateDIBitmap(winDC, (BITMAPINFOHEADER *)&b5hdr, CBM_INIT, list->data, (BITMAPINFO *)&b5hdr, 0/*DIB_RGB_COLORS*/);
-			di = SelectObject(memDC, di);
-			pthread_mutex_lock(&vstatlock);
-			w = vstat.winwidth;
-			h = vstat.winheight;
-			pthread_mutex_unlock(&vstatlock);
-			StretchBlt(winDC, 0, 0, w, h, memDC, 0, 0, list->rect.width, list->rect.height, SRCCOPY);
-			di = SelectObject(memDC, di);
-			DeleteObject(di);
-			EndPaint(hwnd, &ps);
+			return gdi_handle_wm_paint(hwnd);
+		case WM_CHAR:
+			return gdi_handle_wm_char(wParam, lParam);
+		case WM_MOVE:
+			pthread_mutex_lock(&winpos_lock);
+			winxpos = lParam & 0xffff;
+			winypos = (lParam >> 16) & 0xffff;
+			pthread_mutex_unlock(&winpos_lock);
 			return 0;
+		case WM_SIZE:
+			return gdi_handle_wm_size(wParam, lParam);
 		case WM_DESTROY:
 			PostQuitMessage(0);
 			return 0;
-		case WM_CHAR:
-			repeat = lParam & 0xffff;
-			alt = lParam & (1 << 29);
-			if (IS_HIGH_SURROGATE(wParam)) {
-				highpair = wParam;
-				return 0;
-			}
-			else if (IS_LOW_SURROGATE(wParam)) {
-				cp = sp_to_codepoint(highpair, wParam);
+	}
+
+	return DefWindowProcW(hwnd, msg, wParam, lParam);
+}
+
+static void
+gdi_snap(bool grow)
+{
+	bool wc;
+	int w, h;
+
+	if (maximized)
+		return;
+	pthread_mutex_lock(&vstatlock);
+	w = vstat.winwidth;
+	h = vstat.winheight;
+	aspect_fix(&w, &h, vstat.aspect_width, vstat.aspect_height);
+	if (vstat.aspect_width == 0 || vstat.aspect_height == 0)
+		wc = true;
+	else
+		wc = lround((double)(h * vstat.aspect_width) / vstat.aspect_height * vstat.scrnwidth / vstat.scrnheight) > w;
+	if (grow) {
+		if (wc)
+			w = (w - w % vstat.scrnwidth) + vstat.scrnwidth;
+		else
+			h = (h - h % vstat.scrnheight) + vstat.scrnheight;
+	}
+	else {
+		if (wc) {
+			if (w % (vstat.scrnwidth)) {
+				w = w - w % vstat.scrnwidth;
 			}
 			else {
-				cp = wParam;
+				w -= vstat.scrnwidth;
+				if (w < vstat.scrnwidth)
+					w = vstat.scrnwidth;
 			}
-			// Translate from unicode to codepage...
-			ch = cpchar_from_unicode_cpoint(getcodepage(), cp, 0);
-			if (ch) {
-				for (i = 0; i < repeat; i++)
-					add_key(ch);
+		}
+		else {
+			if (h % (vstat.scrnheight)) {
+				h = h - h % vstat.scrnheight;
 			}
-			return 0;
+			else {
+				h -= vstat.scrnheight;
+				if (h < vstat.scrnheight)
+					h = vstat.scrnheight;
+			}
+		}
 	}
-
-	return DefWindowProcW(hwnd, msg, wParam, lParam);
+	if (wc)
+		h = INT_MAX;
+	else
+		w = INT_MAX;
+	aspect_fix(&w, &h, vstat.aspect_width, vstat.aspect_height);
+	if (w > 16384 || h > 16384)
+		gdi_beep();
+	else {
+		vstat.winwidth = w;
+		vstat.winheight = h;
+		set_ciolib_scaling();
+		gdi_setwinsize(w, h);
+	}
+	pthread_mutex_unlock(&vstatlock);
 }
 
 #define WMOD_CTRL     1
@@ -185,6 +369,7 @@ magic_message(MSG msg)
 	RECT r;
 
 	switch(msg.message) {
+		// User messages
 		case WM_USER_INVALIDATE:
 			InvalidateRect(win, NULL, FALSE);
 			return true;
@@ -194,13 +379,16 @@ magic_message(MSG msg)
 			r.left = r.top = 0;
 			r.right = vstat.winwidth = msg.wParam;
 			r.bottom = vstat.winheight = msg.lParam;
+			set_ciolib_scaling();
 			pthread_mutex_unlock(&vstatlock);
-			AdjustWindowRect(&r, WS_OVERLAPPEDWINDOW | WS_VISIBLE, FALSE);
+			AdjustWindowRect(&r, style, FALSE);
 			SetWindowPos(win, NULL, 0, 0, r.right - r.left, r.bottom - r.top, SWP_NOMOVE|SWP_NOOWNERZORDER|SWP_NOZORDER);
 			return true;
 		case WM_USER_SETPOS:
 			SetWindowPos(win, NULL, msg.wParam, msg.lParam, 0, 0, SWP_NOSIZE|SWP_NOOWNERZORDER|SWP_NOZORDER);
 			return true;
+
+		// Keyboard stuff
 		case WM_KEYDOWN:
 		case WM_KEYUP:
 		case WM_SYSKEYDOWN:
@@ -233,13 +421,19 @@ magic_message(MSG msg)
 				return false;
 			}
 
-			if (msg.message == WM_KEYUP)
+			if (msg.message == WM_KEYUP || msg.message == WM_SYSKEYUP)
 				return false;
 
 			for (i = 0; keyval[i].VirtualKeyCode != 0; i++) {
 				if (keyval[i].VirtualKeyCode == msg.wParam) {
 					if (msg.lParam & (1 << 29)) {
 						if (keyval[i].ALT > 255) {
+							if (keyval[i].VirtualKeyCode == VK_LEFT) {
+								gdi_snap(false);
+							}
+							else if (keyval[i].VirtualKeyCode == VK_RIGHT) {
+								gdi_snap(true);
+							}
 							add_key(keyval[i].ALT);
 							return true;
 						}
@@ -266,8 +460,6 @@ magic_message(MSG msg)
 				}
 			}
 			break;
-		case WM_PAINT:
-			break;
 	}
 
 	return false;
@@ -298,8 +490,8 @@ gdi_thread(void *arg)
 	r.right = vstat.winwidth;
 	r.bottom = vstat.winheight;
 	pthread_mutex_unlock(&vstatlock);
-	AdjustWindowRect(&r, WS_OVERLAPPEDWINDOW | WS_VISIBLE, FALSE);
-	win = CreateWindowW(wc.lpszClassName, L"SyncConsole", WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, r.right - r.left, r.bottom - r.top, NULL, NULL, wc.hInstance, NULL);
+	AdjustWindowRect(&r, style, FALSE);
+	win = CreateWindowW(wc.lpszClassName, L"SyncConsole", style, CW_USEDEFAULT, CW_USEDEFAULT, r.right - r.left, r.bottom - r.top, NULL, NULL, wc.hInstance, NULL);
 
 	while (GetMessage(&msg, NULL, 0, 0)) {
 		if (!magic_message(msg)) {
@@ -389,7 +581,8 @@ gdi_textmode(int mode)
 		vstat.winwidth = vstat.scrnwidth;
 	if (vstat.winheight < vstat.scrnheight)
 		vstat.winheight = vstat.scrnheight;
-	// TODO: This is called before there's a window...
+	// TODO? This is called before there's a window...
+	set_ciolib_scaling();
 	gdi_setwinsize(vstat.winwidth, vstat.winheight);
 	pthread_mutex_unlock(&vstatlock);
 	bitmap_drv_request_pixels();
@@ -397,11 +590,6 @@ gdi_textmode(int mode)
 	return;
 }
 
-void
-gdi_setname(const char *name)
-{
-}
-
 void
 gdi_settitle(const char *newTitle)
 {
@@ -421,33 +609,39 @@ gdi_settitle(const char *newTitle)
 void
 gdi_seticon(const void *icon, unsigned long size)
 {
+	// TODO
 }
 
 void
 gdi_copytext(const char *text, size_t buflen)
 {
+	// TODO
 }
 
 char *
 gdi_getcliptext(void)
 {
+	// TODO
 	return NULL;
 }
 
 int
 gdi_get_window_info(int *width, int *height, int *xpos, int *ypos)
 {
+	WINDOWPLACEMENT wp;
+
 	pthread_mutex_lock(&vstatlock);
 	if(width)
 		*width=vstat.winwidth;
 	if(height)
 		*height=vstat.winheight;
-	// TODO
+	pthread_mutex_unlock(&vstatlock);
+	pthread_mutex_lock(&winpos_lock);
 	if(xpos)
-		*xpos=0;
+		*xpos=winxpos;
 	if(ypos)
-		*ypos=0;
-	pthread_mutex_unlock(&vstatlock);
+		*ypos=winypos;
+	pthread_mutex_unlock(&winpos_lock);
 	
 	return(1);
 }
@@ -463,7 +657,7 @@ gdi_init(int mode)
 	_beginthread(gdi_thread, 0, NULL);
 
 	cio_api.mode=CIOLIB_MODE_GDI;
-	//FreeConsole();
+	FreeConsole();
 	cio_api.options |= CONIO_OPT_PALETTE_SETTING | CONIO_OPT_SET_TITLE | CONIO_OPT_SET_NAME | CONIO_OPT_SET_ICON;
 	return(0);
 }
@@ -472,6 +666,7 @@ int
 gdi_initciolib(int mode)
 {
 	pthread_mutex_init(&gdi_headlock, NULL);
+	pthread_mutex_init(&winpos_lock, NULL);
 	pthread_mutex_init(&rect_lock, NULL);
 
 	return(gdi_init(mode));
@@ -512,32 +707,10 @@ gdi_flush(void)
 	}
 }
 
-void
-gdi_setscaling(int newval)
-{
-}
-
-int
-gdi_getscaling(void)
-{
-	return 1;
-}
-
 int
 gdi_mousepointer(enum ciolib_mouse_ptr type)
 {
-	return 0;
-}
-
-int
-gdi_showmouse(void)
-{
-	return 1;
-}
-
-int
-gdi_hidemouse(void)
-{
+	// TODO
 	return 0;
 }
 

src/conio/win32gdi.h

@@ -7,7 +7,6 @@ int gdi_kbhit(void);
 int gdi_getch(void);
 void gdi_beep(void);
 void gdi_textmode(int mode);
-void gdi_setname(const char *name);
 void gdi_settitle(const char *title);
 void gdi_seticon(const void *icon, unsigned long size);
 void gdi_copytext(const char *text, size_t buflen);
@@ -17,11 +16,7 @@ int gdi_init(int mode);
 int gdi_initciolib(int mode);
 void gdi_drawrect(struct rectlist *data);
 void gdi_flush(void);
-void gdi_setscaling(int newval);
-int gdi_getscaling(void);
 int gdi_mousepointer(enum ciolib_mouse_ptr type);
-int gdi_showmouse(void);
-int gdi_hidemouse(void);
 void gdi_setwinposition(int x, int y);
 void gdi_setwinsize(int w, int h);
 

src/syncterm/syncterm.c

@@ -101,7 +101,8 @@ char *usage =
     "       I = Curses mode with forced ASCII charset\n"
     "       F = Curses mode with forced IBM charset\n"
 #else
-    "       W[F] = Win32 native mode, F for fullscreen\n"
+    "       W[F] = Win32 console (text) mode, F for fullscreen\n"
+    "       G    = Win32 GDI (graphics) mode\n"
 #endif
     "       A = ANSI mode\n"
     "-l# =  set screen lines to # (default=auto-detect)\n"
@@ -1606,6 +1607,9 @@ main(int argc, char **argv)
 						case 'F':
 							ciolib_mode = CIOLIB_MODE_CURSES_IBM;
 							break;
+						case 'G':
+							ciolib_mode = CIOLIB_MODE_GDI;
+							break;
 						case 'I':
 							ciolib_mode = CIOLIB_MODE_CURSES_ASCII;
 							break;