ui/curses.c - third_party/qemu - Git at Google

 /*
  * QEMU curses/ncurses display driver
  *
  * Copyright (c) 2005 Andrzej Zaborowski  <balrog@zabor.org>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
 #include "qemu/osdep.h"

 #ifndef _WIN32
 #include <sys/ioctl.h>
 #include <termios.h>
 #endif

 #include "qapi/error.h"
 #include "qemu-common.h"
 #include "ui/console.h"
 #include "ui/input.h"
 #include "sysemu/sysemu.h"

 /* KEY_EVENT is defined in wincon.h and in curses.h. Avoid redefinition. */
 #undef KEY_EVENT
 #include <curses.h>
 #undef KEY_EVENT

 #define FONT_HEIGHT 16
 #define FONT_WIDTH 8

 static DisplayChangeListener *dcl;
 static console_ch_t screen[160 * 100];
 static WINDOW *screenpad = NULL;
 static int width, height, gwidth, gheight, invalidate;
 static int px, py, sminx, sminy, smaxx, smaxy;

 static chtype vga_to_curses[256];

 static void curses_update(DisplayChangeListener *dcl,
                           int x, int y, int w, int h)
 {
     console_ch_t *line;
     chtype curses_line[width];

     line = screen + y * width;
     for (h += y; y < h; y ++, line += width) {
         for (x = 0; x < width; x++) {
             chtype ch = line[x] & 0xff;
             chtype at = line[x] & ~0xff;
             if (vga_to_curses[ch]) {
                 ch = vga_to_curses[ch];
             }
             curses_line[x] = ch | at;
         }
         mvwaddchnstr(screenpad, y, 0, curses_line, width);
     }

     pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
     refresh();
 }

 static void curses_calc_pad(void)
 {
     if (qemu_console_is_fixedsize(NULL)) {
         width = gwidth;
         height = gheight;
     } else {
         width = COLS;
         height = LINES;
     }

     if (screenpad)
         delwin(screenpad);

     clear();
     refresh();

     screenpad = newpad(height, width);

     if (width > COLS) {
         px = (width - COLS) / 2;
         sminx = 0;
         smaxx = COLS;
     } else {
         px = 0;
         sminx = (COLS - width) / 2;
         smaxx = sminx + width;
     }

     if (height > LINES) {
         py = (height - LINES) / 2;
         sminy = 0;
         smaxy = LINES;
     } else {
         py = 0;
         sminy = (LINES - height) / 2;
         smaxy = sminy + height;
     }
 }

 static void curses_resize(DisplayChangeListener *dcl,
                           int width, int height)
 {
     if (width == gwidth && height == gheight) {
         return;
     }

     gwidth = width;
     gheight = height;

     curses_calc_pad();
 }

 #if !defined(_WIN32) && defined(SIGWINCH) && defined(KEY_RESIZE)
 static volatile sig_atomic_t got_sigwinch;
 static void curses_winch_check(void)
 {
     struct winsize {
         unsigned short ws_row;
         unsigned short ws_col;
         unsigned short ws_xpixel;   /* unused */
         unsigned short ws_ypixel;   /* unused */
     } ws;

     if (!got_sigwinch) {
         return;
     }
     got_sigwinch = false;

     if (ioctl(1, TIOCGWINSZ, &ws) == -1) {
         return;
     }

     resize_term(ws.ws_row, ws.ws_col);
     invalidate = 1;
 }

 static void curses_winch_handler(int signum)
 {
     got_sigwinch = true;
 }

 static void curses_winch_init(void)
 {
     struct sigaction old, winch = {
         .sa_handler  = curses_winch_handler,
     };
     sigaction(SIGWINCH, &winch, &old);
 }
 #else
 static void curses_winch_check(void) {}
 static void curses_winch_init(void) {}
 #endif

 static void curses_cursor_position(DisplayChangeListener *dcl,
                                    int x, int y)
 {
     if (x >= 0) {
         x = sminx + x - px;
         y = sminy + y - py;

         if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
             move(y, x);
             curs_set(1);
             /* it seems that curs_set(1) must always be called before
              * curs_set(2) for the latter to have effect */
             if (!qemu_console_is_graphic(NULL)) {
                 curs_set(2);
             }
             return;
         }
     }

     curs_set(0);
 }

 /* generic keyboard conversion */

 #include "curses_keys.h"

 static kbd_layout_t *kbd_layout = NULL;

 static void curses_refresh(DisplayChangeListener *dcl)
 {
     int chr, keysym, keycode, keycode_alt;

     curses_winch_check();

     if (invalidate) {
         clear();
         refresh();
         curses_calc_pad();
         graphic_hw_invalidate(NULL);
         invalidate = 0;
     }

     graphic_hw_text_update(NULL, screen);

     while (1) {
         /* while there are any pending key strokes to process */
         chr = getch();

         if (chr == ERR)
             break;

 #ifdef KEY_RESIZE
         /* this shouldn't occur when we use a custom SIGWINCH handler */
         if (chr == KEY_RESIZE) {
             clear();
             refresh();
             curses_calc_pad();
             curses_update(dcl, 0, 0, width, height);
             continue;
         }
 #endif

         keycode = curses2keycode[chr];
         keycode_alt = 0;

         /* alt key */
         if (keycode == 1) {
             int nextchr = getch();

             if (nextchr != ERR) {
                 chr = nextchr;
                 keycode_alt = ALT;
                 keycode = curses2keycode[chr];

                 if (keycode != -1) {
                     keycode |= ALT;

                     /* process keys reserved for qemu */
                     if (keycode >= QEMU_KEY_CONSOLE0 &&
                             keycode < QEMU_KEY_CONSOLE0 + 9) {
                         erase();
                         wnoutrefresh(stdscr);
                         console_select(keycode - QEMU_KEY_CONSOLE0);

                         invalidate = 1;
                         continue;
                     }
                 }
             }
         }

         if (kbd_layout) {
             keysym = -1;
             if (chr < CURSES_KEYS)
                 keysym = curses2keysym[chr];

             if (keysym == -1) {
                 if (chr < ' ') {
                     keysym = chr + '@';
                     if (keysym >= 'A' && keysym <= 'Z')
                         keysym += 'a' - 'A';
                     keysym |= KEYSYM_CNTRL;
                 } else
                     keysym = chr;
             }

             keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK,
                                       false, false, false);
             if (keycode == 0)
                 continue;

             keycode |= (keysym & ~KEYSYM_MASK) >> 16;
             keycode |= keycode_alt;
         }

         if (keycode == -1)
             continue;

         if (qemu_console_is_graphic(NULL)) {
             /* since terminals don't know about key press and release
              * events, we need to emit both for each key received */
             if (keycode & SHIFT) {
                 qemu_input_event_send_key_number(NULL, SHIFT_CODE, true);
                 qemu_input_event_send_key_delay(0);
             }
             if (keycode & CNTRL) {
                 qemu_input_event_send_key_number(NULL, CNTRL_CODE, true);
                 qemu_input_event_send_key_delay(0);
             }
             if (keycode & ALT) {
                 qemu_input_event_send_key_number(NULL, ALT_CODE, true);
                 qemu_input_event_send_key_delay(0);
             }
             if (keycode & ALTGR) {
                 qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, true);
                 qemu_input_event_send_key_delay(0);
             }

             qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, true);
             qemu_input_event_send_key_delay(0);
             qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, false);
             qemu_input_event_send_key_delay(0);

             if (keycode & ALTGR) {
                 qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, false);
                 qemu_input_event_send_key_delay(0);
             }
             if (keycode & ALT) {
                 qemu_input_event_send_key_number(NULL, ALT_CODE, false);
                 qemu_input_event_send_key_delay(0);
             }
             if (keycode & CNTRL) {
                 qemu_input_event_send_key_number(NULL, CNTRL_CODE, false);
                 qemu_input_event_send_key_delay(0);
             }
             if (keycode & SHIFT) {
                 qemu_input_event_send_key_number(NULL, SHIFT_CODE, false);
                 qemu_input_event_send_key_delay(0);
             }
         } else {
             keysym = -1;
             if (chr < CURSES_KEYS) {
                 keysym = curses2qemu[chr];
             }
             if (keysym == -1)
                 keysym = chr;

             kbd_put_keysym(keysym);
         }
     }
 }

 static void curses_atexit(void)
 {
     endwin();
 }

 static void curses_setup(void)
 {
     int i, colour_default[8] = {
         [QEMU_COLOR_BLACK]   = COLOR_BLACK,
         [QEMU_COLOR_BLUE]    = COLOR_BLUE,
         [QEMU_COLOR_GREEN]   = COLOR_GREEN,
         [QEMU_COLOR_CYAN]    = COLOR_CYAN,
         [QEMU_COLOR_RED]     = COLOR_RED,
         [QEMU_COLOR_MAGENTA] = COLOR_MAGENTA,
         [QEMU_COLOR_YELLOW]  = COLOR_YELLOW,
         [QEMU_COLOR_WHITE]   = COLOR_WHITE,
     };

     /* input as raw as possible, let everything be interpreted
      * by the guest system */
     initscr(); noecho(); intrflush(stdscr, FALSE);
     nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
     start_color(); raw(); scrollok(stdscr, FALSE);

     /* Make color pair to match color format (3bits bg:3bits fg) */
     for (i = 0; i < 64; i++) {
         init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
     }
     /* Set default color for more than 64 for safety. */
     for (i = 64; i < COLOR_PAIRS; i++) {
         init_pair(i, COLOR_WHITE, COLOR_BLACK);
     }

     /*
      * Setup mapping for vga to curses line graphics.
      * FIXME: for better font, have to use ncursesw and setlocale()
      */
 #if 0
     /* FIXME: map from where? */
     ACS_S1;
     ACS_S3;
     ACS_S7;
     ACS_S9;
 #endif
     /* ACS_* is not constant. So, we can't initialize statically. */
     vga_to_curses['\0'] = ' ';
     vga_to_curses[0x04] = ACS_DIAMOND;
     vga_to_curses[0x18] = ACS_UARROW;
     vga_to_curses[0x19] = ACS_DARROW;
     vga_to_curses[0x1a] = ACS_RARROW;
     vga_to_curses[0x1b] = ACS_LARROW;
     vga_to_curses[0x9c] = ACS_STERLING;
     vga_to_curses[0xb0] = ACS_BOARD;
     vga_to_curses[0xb1] = ACS_CKBOARD;
     vga_to_curses[0xb3] = ACS_VLINE;
     vga_to_curses[0xb4] = ACS_RTEE;
     vga_to_curses[0xbf] = ACS_URCORNER;
     vga_to_curses[0xc0] = ACS_LLCORNER;
     vga_to_curses[0xc1] = ACS_BTEE;
     vga_to_curses[0xc2] = ACS_TTEE;
     vga_to_curses[0xc3] = ACS_LTEE;
     vga_to_curses[0xc4] = ACS_HLINE;
     vga_to_curses[0xc5] = ACS_PLUS;
     vga_to_curses[0xce] = ACS_LANTERN;
     vga_to_curses[0xd8] = ACS_NEQUAL;
     vga_to_curses[0xd9] = ACS_LRCORNER;
     vga_to_curses[0xda] = ACS_ULCORNER;
     vga_to_curses[0xdb] = ACS_BLOCK;
     vga_to_curses[0xe3] = ACS_PI;
     vga_to_curses[0xf1] = ACS_PLMINUS;
     vga_to_curses[0xf2] = ACS_GEQUAL;
     vga_to_curses[0xf3] = ACS_LEQUAL;
     vga_to_curses[0xf8] = ACS_DEGREE;
     vga_to_curses[0xfe] = ACS_BULLET;
 }

 static void curses_keyboard_setup(void)
 {
 #if defined(__APPLE__)
     /* always use generic keymaps */
     if (!keyboard_layout)
         keyboard_layout = "en-us";
 #endif
     if(keyboard_layout) {
         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout,
                                           &error_fatal);
     }
 }

 static const DisplayChangeListenerOps dcl_ops = {
     .dpy_name        = "curses",
     .dpy_text_update = curses_update,
     .dpy_text_resize = curses_resize,
     .dpy_refresh     = curses_refresh,
     .dpy_text_cursor = curses_cursor_position,
 };

 static void curses_display_init(DisplayState *ds, DisplayOptions *opts)
 {
 #ifndef _WIN32
     if (!isatty(1)) {
         fprintf(stderr, "We need a terminal output\n");
         exit(1);
     }
 #endif

     curses_setup();
     curses_keyboard_setup();
     atexit(curses_atexit);

     curses_winch_init();

     dcl = g_new0(DisplayChangeListener, 1);
     dcl->ops = &dcl_ops;
     register_displaychangelistener(dcl);

     invalidate = 1;
 }

 static QemuDisplay qemu_display_curses = {
     .type       = DISPLAY_TYPE_CURSES,
     .init       = curses_display_init,
 };

 static void register_curses(void)
 {
     qemu_display_register(&qemu_display_curses);
 }

 type_init(register_curses);
	/*
	* QEMU curses/ncurses display driver
	*
	* Copyright (c) 2005 Andrzej Zaborowski <balrog@zabor.org>
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*/
	#include "qemu/osdep.h"

	#ifndef _WIN32
	#include <sys/ioctl.h>
	#include <termios.h>
	#endif

	#include "qapi/error.h"
	#include "qemu-common.h"
	#include "ui/console.h"
	#include "ui/input.h"
	#include "sysemu/sysemu.h"

	/* KEY_EVENT is defined in wincon.h and in curses.h. Avoid redefinition. */
	#undef KEY_EVENT
	#include <curses.h>
	#undef KEY_EVENT

	#define FONT_HEIGHT 16
	#define FONT_WIDTH 8

	static DisplayChangeListener *dcl;
	static console_ch_t screen[160 * 100];
	static WINDOW *screenpad = NULL;
	static int width, height, gwidth, gheight, invalidate;
	static int px, py, sminx, sminy, smaxx, smaxy;

	static chtype vga_to_curses[256];

	static void curses_update(DisplayChangeListener *dcl,
	int x, int y, int w, int h)
	{
	console_ch_t *line;
	chtype curses_line[width];

	line = screen + y * width;
	for (h += y; y < h; y ++, line += width) {
	for (x = 0; x < width; x++) {
	chtype ch = line[x] & 0xff;
	chtype at = line[x] & ~0xff;
	if (vga_to_curses[ch]) {
	ch = vga_to_curses[ch];
	}
	curses_line[x] = ch \| at;
	}
	mvwaddchnstr(screenpad, y, 0, curses_line, width);
	}

	pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
	refresh();
	}

	static void curses_calc_pad(void)
	{
	if (qemu_console_is_fixedsize(NULL)) {
	width = gwidth;
	height = gheight;
	} else {
	width = COLS;
	height = LINES;
	}

	if (screenpad)
	delwin(screenpad);

	clear();
	refresh();

	screenpad = newpad(height, width);

	if (width > COLS) {
	px = (width - COLS) / 2;
	sminx = 0;
	smaxx = COLS;
	} else {
	px = 0;
	sminx = (COLS - width) / 2;
	smaxx = sminx + width;
	}

	if (height > LINES) {
	py = (height - LINES) / 2;
	sminy = 0;
	smaxy = LINES;
	} else {
	py = 0;
	sminy = (LINES - height) / 2;
	smaxy = sminy + height;
	}
	}

	static void curses_resize(DisplayChangeListener *dcl,
	int width, int height)
	{
	if (width == gwidth && height == gheight) {
	return;
	}

	gwidth = width;
	gheight = height;

	curses_calc_pad();
	}

	#if !defined(_WIN32) && defined(SIGWINCH) && defined(KEY_RESIZE)
	static volatile sig_atomic_t got_sigwinch;
	static void curses_winch_check(void)
	{
	struct winsize {
	unsigned short ws_row;
	unsigned short ws_col;
	unsigned short ws_xpixel; /* unused */
	unsigned short ws_ypixel; /* unused */
	} ws;

	if (!got_sigwinch) {
	return;
	}
	got_sigwinch = false;

	if (ioctl(1, TIOCGWINSZ, &ws) == -1) {
	return;
	}

	resize_term(ws.ws_row, ws.ws_col);
	invalidate = 1;
	}

	static void curses_winch_handler(int signum)
	{
	got_sigwinch = true;
	}

	static void curses_winch_init(void)
	{
	struct sigaction old, winch = {
	.sa_handler = curses_winch_handler,
	};
	sigaction(SIGWINCH, &winch, &old);
	}
	#else
	static void curses_winch_check(void) {}
	static void curses_winch_init(void) {}
	#endif

	static void curses_cursor_position(DisplayChangeListener *dcl,
	int x, int y)
	{
	if (x >= 0) {
	x = sminx + x - px;
	y = sminy + y - py;

	if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
	move(y, x);
	curs_set(1);
	/* it seems that curs_set(1) must always be called before
	* curs_set(2) for the latter to have effect */
	if (!qemu_console_is_graphic(NULL)) {
	curs_set(2);
	}
	return;
	}
	}

	curs_set(0);
	}

	/* generic keyboard conversion */

	#include "curses_keys.h"

	static kbd_layout_t *kbd_layout = NULL;

	static void curses_refresh(DisplayChangeListener *dcl)
	{
	int chr, keysym, keycode, keycode_alt;

	curses_winch_check();

	if (invalidate) {
	clear();
	refresh();
	curses_calc_pad();
	graphic_hw_invalidate(NULL);
	invalidate = 0;
	}

	graphic_hw_text_update(NULL, screen);

	while (1) {
	/* while there are any pending key strokes to process */
	chr = getch();

	if (chr == ERR)
	break;

	#ifdef KEY_RESIZE
	/* this shouldn't occur when we use a custom SIGWINCH handler */
	if (chr == KEY_RESIZE) {
	clear();
	refresh();
	curses_calc_pad();
	curses_update(dcl, 0, 0, width, height);
	continue;
	}
	#endif

	keycode = curses2keycode[chr];
	keycode_alt = 0;

	/* alt key */
	if (keycode == 1) {
	int nextchr = getch();

	if (nextchr != ERR) {
	chr = nextchr;
	keycode_alt = ALT;
	keycode = curses2keycode[chr];

	if (keycode != -1) {
	keycode \|= ALT;

	/* process keys reserved for qemu */
	if (keycode >= QEMU_KEY_CONSOLE0 &&
	keycode < QEMU_KEY_CONSOLE0 + 9) {
	erase();
	wnoutrefresh(stdscr);
	console_select(keycode - QEMU_KEY_CONSOLE0);

	invalidate = 1;
	continue;
	}
	}
	}
	}

	if (kbd_layout) {
	keysym = -1;
	if (chr < CURSES_KEYS)
	keysym = curses2keysym[chr];

	if (keysym == -1) {
	if (chr < ' ') {
	keysym = chr + '@';
	if (keysym >= 'A' && keysym <= 'Z')
	keysym += 'a' - 'A';
	keysym \|= KEYSYM_CNTRL;
	} else
	keysym = chr;
	}

	keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK,
	false, false, false);
	if (keycode == 0)
	continue;

	keycode \|= (keysym & ~KEYSYM_MASK) >> 16;
	keycode \|= keycode_alt;
	}

	if (keycode == -1)
	continue;

	if (qemu_console_is_graphic(NULL)) {
	/* since terminals don't know about key press and release
	* events, we need to emit both for each key received */
	if (keycode & SHIFT) {
	qemu_input_event_send_key_number(NULL, SHIFT_CODE, true);
	qemu_input_event_send_key_delay(0);
	}
	if (keycode & CNTRL) {
	qemu_input_event_send_key_number(NULL, CNTRL_CODE, true);
	qemu_input_event_send_key_delay(0);
	}
	if (keycode & ALT) {
	qemu_input_event_send_key_number(NULL, ALT_CODE, true);
	qemu_input_event_send_key_delay(0);
	}
	if (keycode & ALTGR) {
	qemu_input_event_send_key_number(NULL, GREY \| ALT_CODE, true);
	qemu_input_event_send_key_delay(0);
	}

	qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, true);
	qemu_input_event_send_key_delay(0);
	qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, false);
	qemu_input_event_send_key_delay(0);

	if (keycode & ALTGR) {
	qemu_input_event_send_key_number(NULL, GREY \| ALT_CODE, false);
	qemu_input_event_send_key_delay(0);
	}
	if (keycode & ALT) {
	qemu_input_event_send_key_number(NULL, ALT_CODE, false);
	qemu_input_event_send_key_delay(0);
	}
	if (keycode & CNTRL) {
	qemu_input_event_send_key_number(NULL, CNTRL_CODE, false);
	qemu_input_event_send_key_delay(0);
	}
	if (keycode & SHIFT) {
	qemu_input_event_send_key_number(NULL, SHIFT_CODE, false);
	qemu_input_event_send_key_delay(0);
	}
	} else {
	keysym = -1;
	if (chr < CURSES_KEYS) {
	keysym = curses2qemu[chr];
	}
	if (keysym == -1)
	keysym = chr;

	kbd_put_keysym(keysym);
	}
	}
	}

	static void curses_atexit(void)
	{
	endwin();
	}

	static void curses_setup(void)
	{
	int i, colour_default[8] = {
	[QEMU_COLOR_BLACK] = COLOR_BLACK,
	[QEMU_COLOR_BLUE] = COLOR_BLUE,
	[QEMU_COLOR_GREEN] = COLOR_GREEN,
	[QEMU_COLOR_CYAN] = COLOR_CYAN,
	[QEMU_COLOR_RED] = COLOR_RED,
	[QEMU_COLOR_MAGENTA] = COLOR_MAGENTA,
	[QEMU_COLOR_YELLOW] = COLOR_YELLOW,
	[QEMU_COLOR_WHITE] = COLOR_WHITE,
	};

	/* input as raw as possible, let everything be interpreted
	* by the guest system */
	initscr(); noecho(); intrflush(stdscr, FALSE);
	nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
	start_color(); raw(); scrollok(stdscr, FALSE);

	/* Make color pair to match color format (3bits bg:3bits fg) */
	for (i = 0; i < 64; i++) {
	init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
	}
	/* Set default color for more than 64 for safety. */
	for (i = 64; i < COLOR_PAIRS; i++) {
	init_pair(i, COLOR_WHITE, COLOR_BLACK);
	}

	/*
	* Setup mapping for vga to curses line graphics.
	* FIXME: for better font, have to use ncursesw and setlocale()
	*/
	#if 0
	/* FIXME: map from where? */
	ACS_S1;
	ACS_S3;
	ACS_S7;
	ACS_S9;
	#endif
	/* ACS_* is not constant. So, we can't initialize statically. */
	vga_to_curses['\0'] = ' ';
	vga_to_curses[0x04] = ACS_DIAMOND;
	vga_to_curses[0x18] = ACS_UARROW;
	vga_to_curses[0x19] = ACS_DARROW;
	vga_to_curses[0x1a] = ACS_RARROW;
	vga_to_curses[0x1b] = ACS_LARROW;
	vga_to_curses[0x9c] = ACS_STERLING;
	vga_to_curses[0xb0] = ACS_BOARD;
	vga_to_curses[0xb1] = ACS_CKBOARD;
	vga_to_curses[0xb3] = ACS_VLINE;
	vga_to_curses[0xb4] = ACS_RTEE;
	vga_to_curses[0xbf] = ACS_URCORNER;
	vga_to_curses[0xc0] = ACS_LLCORNER;
	vga_to_curses[0xc1] = ACS_BTEE;
	vga_to_curses[0xc2] = ACS_TTEE;
	vga_to_curses[0xc3] = ACS_LTEE;
	vga_to_curses[0xc4] = ACS_HLINE;
	vga_to_curses[0xc5] = ACS_PLUS;
	vga_to_curses[0xce] = ACS_LANTERN;
	vga_to_curses[0xd8] = ACS_NEQUAL;
	vga_to_curses[0xd9] = ACS_LRCORNER;
	vga_to_curses[0xda] = ACS_ULCORNER;
	vga_to_curses[0xdb] = ACS_BLOCK;
	vga_to_curses[0xe3] = ACS_PI;
	vga_to_curses[0xf1] = ACS_PLMINUS;
	vga_to_curses[0xf2] = ACS_GEQUAL;
	vga_to_curses[0xf3] = ACS_LEQUAL;
	vga_to_curses[0xf8] = ACS_DEGREE;
	vga_to_curses[0xfe] = ACS_BULLET;
	}

	static void curses_keyboard_setup(void)
	{
	#if defined(__APPLE__)
	/* always use generic keymaps */
	if (!keyboard_layout)
	keyboard_layout = "en-us";
	#endif
	if(keyboard_layout) {
	kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout,
	&error_fatal);
	}
	}

	static const DisplayChangeListenerOps dcl_ops = {
	.dpy_name = "curses",
	.dpy_text_update = curses_update,
	.dpy_text_resize = curses_resize,
	.dpy_refresh = curses_refresh,
	.dpy_text_cursor = curses_cursor_position,
	};

	static void curses_display_init(DisplayState ds, DisplayOptions opts)
	{
	#ifndef _WIN32
	if (!isatty(1)) {
	fprintf(stderr, "We need a terminal output\n");
	exit(1);
	}
	#endif

	curses_setup();
	curses_keyboard_setup();
	atexit(curses_atexit);

	curses_winch_init();

	dcl = g_new0(DisplayChangeListener, 1);
	dcl->ops = &dcl_ops;
	register_displaychangelistener(dcl);

	invalidate = 1;
	}

	static QemuDisplay qemu_display_curses = {
	.type = DISPLAY_TYPE_CURSES,
	.init = curses_display_init,
	};

	static void register_curses(void)
	{
	qemu_display_register(&qemu_display_curses);
	}

	type_init(register_curses);