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qemu/ui/curses.c
Philippe Mathieu-Daudé 76c51fc3af ui/curses: Move arrays to .heap to save 74KiB of .bss 
We only need these arrays when using the curses display.
Move them from the .bss to the .heap (sizes reported on
x86_64 host: screen[] is 64KiB, vga_to_curses 7KiB).

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-16 23:02:25 +01:00

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/*
* 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 <locale.h>
#include <wchar.h>
#include <langinfo.h>
#include <iconv.h>
#include "qapi/error.h"
#include "qemu/module.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
enum maybe_keycode {
CURSES_KEYCODE,
CURSES_CHAR,
CURSES_CHAR_OR_KEYCODE,
};
static DisplayChangeListener *dcl;
static console_ch_t *screen;
static WINDOW *screenpad = NULL;
static int width, height, gwidth, gheight, invalidate;
static int px, py, sminx, sminy, smaxx, smaxy;
static const char *font_charset = "CP437";
static cchar_t *vga_to_curses;
static void curses_update(DisplayChangeListener *dcl,
int x, int y, int w, int h)
{
console_ch_t *line;
cchar_t curses_line[width];
wchar_t wch[CCHARW_MAX];
attr_t attrs;
short colors;
int ret;
line = screen + y * width;
for (h += y; y < h; y ++, line += width) {
for (x = 0; x < width; x++) {
chtype ch = line[x] & A_CHARTEXT;
chtype at = line[x] & A_ATTRIBUTES;
short color_pair = PAIR_NUMBER(line[x]);
ret = getcchar(&vga_to_curses[ch], wch, &attrs, &colors, NULL);
if (ret == ERR || wch[0] == 0) {
wch[0] = ch;
wch[1] = 0;
}
setcchar(&curses_line[x], wch, at, color_pair, NULL);
}
mvwadd_wchnstr(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 wint_t console_getch(enum maybe_keycode *maybe_keycode)
{
wint_t ret;
switch (get_wch(&ret)) {
case KEY_CODE_YES:
*maybe_keycode = CURSES_KEYCODE;
break;
case OK:
*maybe_keycode = CURSES_CHAR;
break;
case ERR:
ret = -1;
break;
default:
abort();
}
return ret;
}
static int curses2foo(const int _curses2foo[], const int _curseskey2foo[],
int chr, enum maybe_keycode maybe_keycode)
{
int ret = -1;
if (maybe_keycode == CURSES_CHAR) {
if (chr < CURSES_CHARS) {
ret = _curses2foo[chr];
}
} else {
if (chr < CURSES_KEYS) {
ret = _curseskey2foo[chr];
}
if (ret == -1 && maybe_keycode == CURSES_CHAR_OR_KEYCODE &&
chr < CURSES_CHARS) {
ret = _curses2foo[chr];
}
}
return ret;
}
#define curses2keycode(chr, maybe_keycode) \
curses2foo(_curses2keycode, _curseskey2keycode, chr, maybe_keycode)
#define curses2keysym(chr, maybe_keycode) \
curses2foo(_curses2keysym, _curseskey2keysym, chr, maybe_keycode)
#define curses2qemu(chr, maybe_keycode) \
curses2foo(_curses2qemu, _curseskey2qemu, chr, maybe_keycode)
static void curses_refresh(DisplayChangeListener *dcl)
{
int chr, keysym, keycode, keycode_alt;
enum maybe_keycode maybe_keycode;
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 = console_getch(&maybe_keycode);
if (chr == -1)
break;
#ifdef KEY_RESIZE
/* this shouldn't occur when we use a custom SIGWINCH handler */
if (maybe_keycode != CURSES_CHAR && chr == KEY_RESIZE) {
clear();
refresh();
curses_calc_pad();
curses_update(dcl, 0, 0, width, height);
continue;
}
#endif
keycode = curses2keycode(chr, maybe_keycode);
keycode_alt = 0;
/* alt or esc key */
if (keycode == 1) {
enum maybe_keycode next_maybe_keycode;
int nextchr = console_getch(&next_maybe_keycode);
if (nextchr != -1) {
chr = nextchr;
maybe_keycode = next_maybe_keycode;
keycode_alt = ALT;
keycode = curses2keycode(chr, maybe_keycode);
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 = curses2keysym(chr, maybe_keycode);
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,
NULL, 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 = curses2qemu(chr, maybe_keycode);
if (keysym == -1)
keysym = chr;
kbd_put_keysym(keysym);
}
}
}
static void curses_atexit(void)
{
endwin();
g_free(vga_to_curses);
g_free(screen);
}
/*
* In the following:
* - fch is the font glyph number
* - uch is the unicode value
* - wch is the wchar_t value (may not be unicode, e.g. on BSD/solaris)
* - mbch is the native local-dependent multibyte representation
*/
/* Setup wchar glyph for one UCS-2 char */
static void convert_ucs(unsigned char fch, uint16_t uch, iconv_t conv)
{
char mbch[MB_LEN_MAX];
wchar_t wch[2];
char *puch, *pmbch;
size_t such, smbch;
mbstate_t ps;
puch = (char *) &uch;
pmbch = (char *) mbch;
such = sizeof(uch);
smbch = sizeof(mbch);
if (iconv(conv, &puch, &such, &pmbch, &smbch) == (size_t) -1) {
fprintf(stderr, "Could not convert 0x%04x "
"from UCS-2 to a multibyte character: %s\n",
uch, strerror(errno));
return;
}
memset(&ps, 0, sizeof(ps));
if (mbrtowc(&wch[0], mbch, sizeof(mbch) - smbch, &ps) == -1) {
fprintf(stderr, "Could not convert 0x%04x "
"from a multibyte character to wchar_t: %s\n",
uch, strerror(errno));
return;
}
wch[1] = 0;
setcchar(&vga_to_curses[fch], wch, 0, 0, NULL);
}
/* Setup wchar glyph for one font character */
static void convert_font(unsigned char fch, iconv_t conv)
{
char mbch[MB_LEN_MAX];
wchar_t wch[2];
char *pfch, *pmbch;
size_t sfch, smbch;
mbstate_t ps;
pfch = (char *) &fch;
pmbch = (char *) &mbch;
sfch = sizeof(fch);
smbch = sizeof(mbch);
if (iconv(conv, &pfch, &sfch, &pmbch, &smbch) == (size_t) -1) {
fprintf(stderr, "Could not convert font glyph 0x%02x "
"from %s to a multibyte character: %s\n",
fch, font_charset, strerror(errno));
return;
}
memset(&ps, 0, sizeof(ps));
if (mbrtowc(&wch[0], mbch, sizeof(mbch) - smbch, &ps) == -1) {
fprintf(stderr, "Could not convert font glyph 0x%02x "
"from a multibyte character to wchar_t: %s\n",
fch, strerror(errno));
return;
}
wch[1] = 0;
setcchar(&vga_to_curses[fch], wch, 0, 0, NULL);
}
/* Convert one wchar to UCS-2 */
static uint16_t get_ucs(wchar_t wch, iconv_t conv)
{
char mbch[MB_LEN_MAX];
uint16_t uch;
char *pmbch, *puch;
size_t smbch, such;
mbstate_t ps;
int ret;
memset(&ps, 0, sizeof(ps));
ret = wcrtomb(mbch, wch, &ps);
if (ret == -1) {
fprintf(stderr, "Could not convert 0x%04lx "
"from wchar_t to a multibyte character: %s\n",
(unsigned long)wch, strerror(errno));
return 0xFFFD;
}
pmbch = (char *) mbch;
puch = (char *) &uch;
smbch = ret;
such = sizeof(uch);
if (iconv(conv, &pmbch, &smbch, &puch, &such) == (size_t) -1) {
fprintf(stderr, "Could not convert 0x%04lx "
"from a multibyte character to UCS-2 : %s\n",
(unsigned long)wch, strerror(errno));
return 0xFFFD;
}
return uch;
}
/*
* Setup mapping for vga to curses line graphics.
*/
static void font_setup(void)
{
iconv_t ucs2_to_nativecharset;
iconv_t nativecharset_to_ucs2;
iconv_t font_conv;
int i;
/*
* Control characters are normally non-printable, but VGA does have
* well-known glyphs for them.
*/
static const uint16_t control_characters[0x20] = {
0x0020,
0x263a,
0x263b,
0x2665,
0x2666,
0x2663,
0x2660,
0x2022,
0x25d8,
0x25cb,
0x25d9,
0x2642,
0x2640,
0x266a,
0x266b,
0x263c,
0x25ba,
0x25c4,
0x2195,
0x203c,
0x00b6,
0x00a7,
0x25ac,
0x21a8,
0x2191,
0x2193,
0x2192,
0x2190,
0x221f,
0x2194,
0x25b2,
0x25bc
};
ucs2_to_nativecharset = iconv_open(nl_langinfo(CODESET), "UCS-2");
if (ucs2_to_nativecharset == (iconv_t) -1) {
fprintf(stderr, "Could not convert font glyphs from UCS-2: '%s'\n",
strerror(errno));
exit(1);
}
nativecharset_to_ucs2 = iconv_open("UCS-2", nl_langinfo(CODESET));
if (nativecharset_to_ucs2 == (iconv_t) -1) {
iconv_close(ucs2_to_nativecharset);
fprintf(stderr, "Could not convert font glyphs to UCS-2: '%s'\n",
strerror(errno));
exit(1);
}
font_conv = iconv_open(nl_langinfo(CODESET), font_charset);
if (font_conv == (iconv_t) -1) {
iconv_close(ucs2_to_nativecharset);
iconv_close(nativecharset_to_ucs2);
fprintf(stderr, "Could not convert font glyphs from %s: '%s'\n",
font_charset, strerror(errno));
exit(1);
}
/* Control characters */
for (i = 0; i <= 0x1F; i++) {
convert_ucs(i, control_characters[i], ucs2_to_nativecharset);
}
for (i = 0x20; i <= 0xFF; i++) {
convert_font(i, font_conv);
}
/* DEL */
convert_ucs(0x7F, 0x2302, ucs2_to_nativecharset);
if (strcmp(nl_langinfo(CODESET), "UTF-8")) {
/* Non-Unicode capable, use termcap equivalents for those available */
for (i = 0; i <= 0xFF; i++) {
wchar_t wch[CCHARW_MAX];
attr_t attr;
short color;
int ret;
ret = getcchar(&vga_to_curses[i], wch, &attr, &color, NULL);
if (ret == ERR)
continue;
switch (get_ucs(wch[0], nativecharset_to_ucs2)) {
case 0x00a3:
vga_to_curses[i] = *WACS_STERLING;
break;
case 0x2591:
vga_to_curses[i] = *WACS_BOARD;
break;
case 0x2592:
vga_to_curses[i] = *WACS_CKBOARD;
break;
case 0x2502:
vga_to_curses[i] = *WACS_VLINE;
break;
case 0x2524:
vga_to_curses[i] = *WACS_RTEE;
break;
case 0x2510:
vga_to_curses[i] = *WACS_URCORNER;
break;
case 0x2514:
vga_to_curses[i] = *WACS_LLCORNER;
break;
case 0x2534:
vga_to_curses[i] = *WACS_BTEE;
break;
case 0x252c:
vga_to_curses[i] = *WACS_TTEE;
break;
case 0x251c:
vga_to_curses[i] = *WACS_LTEE;
break;
case 0x2500:
vga_to_curses[i] = *WACS_HLINE;
break;
case 0x253c:
vga_to_curses[i] = *WACS_PLUS;
break;
case 0x256c:
vga_to_curses[i] = *WACS_LANTERN;
break;
case 0x256a:
vga_to_curses[i] = *WACS_NEQUAL;
break;
case 0x2518:
vga_to_curses[i] = *WACS_LRCORNER;
break;
case 0x250c:
vga_to_curses[i] = *WACS_ULCORNER;
break;
case 0x2588:
vga_to_curses[i] = *WACS_BLOCK;
break;
case 0x03c0:
vga_to_curses[i] = *WACS_PI;
break;
case 0x00b1:
vga_to_curses[i] = *WACS_PLMINUS;
break;
case 0x2265:
vga_to_curses[i] = *WACS_GEQUAL;
break;
case 0x2264:
vga_to_curses[i] = *WACS_LEQUAL;
break;
case 0x00b0:
vga_to_curses[i] = *WACS_DEGREE;
break;
case 0x25a0:
vga_to_curses[i] = *WACS_BULLET;
break;
case 0x2666:
vga_to_curses[i] = *WACS_DIAMOND;
break;
case 0x2192:
vga_to_curses[i] = *WACS_RARROW;
break;
case 0x2190:
vga_to_curses[i] = *WACS_LARROW;
break;
case 0x2191:
vga_to_curses[i] = *WACS_UARROW;
break;
case 0x2193:
vga_to_curses[i] = *WACS_DARROW;
break;
case 0x23ba:
vga_to_curses[i] = *WACS_S1;
break;
case 0x23bb:
vga_to_curses[i] = *WACS_S3;
break;
case 0x23bc:
vga_to_curses[i] = *WACS_S7;
break;
case 0x23bd:
vga_to_curses[i] = *WACS_S9;
break;
}
}
}
iconv_close(ucs2_to_nativecharset);
iconv_close(nativecharset_to_ucs2);
iconv_close(font_conv);
}
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);
set_escdelay(25);
/* 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);
}
font_setup();
}
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
setlocale(LC_CTYPE, "");
if (opts->u.curses.charset) {
font_charset = opts->u.curses.charset;
}
screen = g_new0(console_ch_t, 160 * 100);
vga_to_curses = g_new0(cchar_t, 256);
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);
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