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qemu/ui/console-vc.c
Philippe Mathieu-Daudé 06252bf512 util/fifo8: Rename fifo8_pop_buf() -> fifo8_pop_bufptr() 
Since fifo8_pop_buf() return a const buffer (which points
directly into the FIFO backing store). Rename it using the
'bufptr' suffix to better reflect that it is a pointer to
the internal buffer that is being returned. This will help
differentiate with methods *copying* the FIFO data.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20240722160745.67904-6-philmd@linaro.org>
2024-07-23 22:34:54 +02:00

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/*
* SPDX-License-Identifier: MIT
* QEMU VC
*/
#include "qemu/osdep.h"
#include "chardev/char.h"
#include "qapi/error.h"
#include "qemu/fifo8.h"
#include "qemu/option.h"
#include "ui/console.h"
#include "trace.h"
#include "console-priv.h"
#define DEFAULT_BACKSCROLL 512
#define CONSOLE_CURSOR_PERIOD 500
typedef struct TextAttributes {
uint8_t fgcol:4;
uint8_t bgcol:4;
uint8_t bold:1;
uint8_t uline:1;
uint8_t blink:1;
uint8_t invers:1;
uint8_t unvisible:1;
} TextAttributes;
#define TEXT_ATTRIBUTES_DEFAULT ((TextAttributes) { \
.fgcol = QEMU_COLOR_WHITE, \
.bgcol = QEMU_COLOR_BLACK \
})
typedef struct TextCell {
uint8_t ch;
TextAttributes t_attrib;
} TextCell;
#define MAX_ESC_PARAMS 3
enum TTYState {
TTY_STATE_NORM,
TTY_STATE_ESC,
TTY_STATE_CSI,
};
typedef struct QemuTextConsole {
QemuConsole parent;
int width;
int height;
int total_height;
int backscroll_height;
int x, y;
int y_displayed;
int y_base;
TextCell *cells;
int text_x[2], text_y[2], cursor_invalidate;
int echo;
int update_x0;
int update_y0;
int update_x1;
int update_y1;
Chardev *chr;
/* fifo for key pressed */
Fifo8 out_fifo;
} QemuTextConsole;
typedef QemuConsoleClass QemuTextConsoleClass;
OBJECT_DEFINE_TYPE(QemuTextConsole, qemu_text_console, QEMU_TEXT_CONSOLE, QEMU_CONSOLE)
typedef struct QemuFixedTextConsole {
QemuTextConsole parent;
} QemuFixedTextConsole;
typedef QemuTextConsoleClass QemuFixedTextConsoleClass;
OBJECT_DEFINE_TYPE(QemuFixedTextConsole, qemu_fixed_text_console, QEMU_FIXED_TEXT_CONSOLE, QEMU_TEXT_CONSOLE)
struct VCChardev {
Chardev parent;
QemuTextConsole *console;
enum TTYState state;
int esc_params[MAX_ESC_PARAMS];
int nb_esc_params;
TextAttributes t_attrib; /* currently active text attributes */
int x_saved, y_saved;
};
typedef struct VCChardev VCChardev;
static const pixman_color_t color_table_rgb[2][8] = {
{ /* dark */
[QEMU_COLOR_BLACK] = QEMU_PIXMAN_COLOR_BLACK,
[QEMU_COLOR_BLUE] = QEMU_PIXMAN_COLOR(0x00, 0x00, 0xaa), /* blue */
[QEMU_COLOR_GREEN] = QEMU_PIXMAN_COLOR(0x00, 0xaa, 0x00), /* green */
[QEMU_COLOR_CYAN] = QEMU_PIXMAN_COLOR(0x00, 0xaa, 0xaa), /* cyan */
[QEMU_COLOR_RED] = QEMU_PIXMAN_COLOR(0xaa, 0x00, 0x00), /* red */
[QEMU_COLOR_MAGENTA] = QEMU_PIXMAN_COLOR(0xaa, 0x00, 0xaa), /* magenta */
[QEMU_COLOR_YELLOW] = QEMU_PIXMAN_COLOR(0xaa, 0xaa, 0x00), /* yellow */
[QEMU_COLOR_WHITE] = QEMU_PIXMAN_COLOR_GRAY,
},
{ /* bright */
[QEMU_COLOR_BLACK] = QEMU_PIXMAN_COLOR_BLACK,
[QEMU_COLOR_BLUE] = QEMU_PIXMAN_COLOR(0x00, 0x00, 0xff), /* blue */
[QEMU_COLOR_GREEN] = QEMU_PIXMAN_COLOR(0x00, 0xff, 0x00), /* green */
[QEMU_COLOR_CYAN] = QEMU_PIXMAN_COLOR(0x00, 0xff, 0xff), /* cyan */
[QEMU_COLOR_RED] = QEMU_PIXMAN_COLOR(0xff, 0x00, 0x00), /* red */
[QEMU_COLOR_MAGENTA] = QEMU_PIXMAN_COLOR(0xff, 0x00, 0xff), /* magenta */
[QEMU_COLOR_YELLOW] = QEMU_PIXMAN_COLOR(0xff, 0xff, 0x00), /* yellow */
[QEMU_COLOR_WHITE] = QEMU_PIXMAN_COLOR(0xff, 0xff, 0xff), /* white */
}
};
static bool cursor_visible_phase;
static QEMUTimer *cursor_timer;
const char *
qemu_text_console_get_label(QemuTextConsole *c)
{
return c->chr ? c->chr->label : NULL;
}
static void qemu_console_fill_rect(QemuConsole *con, int posx, int posy,
int width, int height, pixman_color_t color)
{
DisplaySurface *surface = qemu_console_surface(con);
pixman_rectangle16_t rect = {
.x = posx, .y = posy, .width = width, .height = height
};
assert(surface);
pixman_image_fill_rectangles(PIXMAN_OP_SRC, surface->image,
&color, 1, &rect);
}
/* copy from (xs, ys) to (xd, yd) a rectangle of size (w, h) */
static void qemu_console_bitblt(QemuConsole *con,
int xs, int ys, int xd, int yd, int w, int h)
{
DisplaySurface *surface = qemu_console_surface(con);
assert(surface);
pixman_image_composite(PIXMAN_OP_SRC,
surface->image, NULL, surface->image,
xs, ys, 0, 0, xd, yd, w, h);
}
static void vga_putcharxy(QemuConsole *s, int x, int y, int ch,
TextAttributes *t_attrib)
{
static pixman_image_t *glyphs[256];
DisplaySurface *surface = qemu_console_surface(s);
pixman_color_t fgcol, bgcol;
assert(surface);
if (t_attrib->invers) {
bgcol = color_table_rgb[t_attrib->bold][t_attrib->fgcol];
fgcol = color_table_rgb[t_attrib->bold][t_attrib->bgcol];
} else {
fgcol = color_table_rgb[t_attrib->bold][t_attrib->fgcol];
bgcol = color_table_rgb[t_attrib->bold][t_attrib->bgcol];
}
if (!glyphs[ch]) {
glyphs[ch] = qemu_pixman_glyph_from_vgafont(FONT_HEIGHT, vgafont16, ch);
}
qemu_pixman_glyph_render(glyphs[ch], surface->image,
&fgcol, &bgcol, x, y, FONT_WIDTH, FONT_HEIGHT);
}
static void invalidate_xy(QemuTextConsole *s, int x, int y)
{
if (!qemu_console_is_visible(QEMU_CONSOLE(s))) {
return;
}
if (s->update_x0 > x * FONT_WIDTH)
s->update_x0 = x * FONT_WIDTH;
if (s->update_y0 > y * FONT_HEIGHT)
s->update_y0 = y * FONT_HEIGHT;
if (s->update_x1 < (x + 1) * FONT_WIDTH)
s->update_x1 = (x + 1) * FONT_WIDTH;
if (s->update_y1 < (y + 1) * FONT_HEIGHT)
s->update_y1 = (y + 1) * FONT_HEIGHT;
}
static void console_show_cursor(QemuTextConsole *s, int show)
{
TextCell *c;
int y, y1;
int x = s->x;
s->cursor_invalidate = 1;
if (x >= s->width) {
x = s->width - 1;
}
y1 = (s->y_base + s->y) % s->total_height;
y = y1 - s->y_displayed;
if (y < 0) {
y += s->total_height;
}
if (y < s->height) {
c = &s->cells[y1 * s->width + x];
if (show && cursor_visible_phase) {
TextAttributes t_attrib = TEXT_ATTRIBUTES_DEFAULT;
t_attrib.invers = !(t_attrib.invers); /* invert fg and bg */
vga_putcharxy(QEMU_CONSOLE(s), x, y, c->ch, &t_attrib);
} else {
vga_putcharxy(QEMU_CONSOLE(s), x, y, c->ch, &(c->t_attrib));
}
invalidate_xy(s, x, y);
}
}
static void console_refresh(QemuTextConsole *s)
{
DisplaySurface *surface = qemu_console_surface(QEMU_CONSOLE(s));
TextCell *c;
int x, y, y1;
assert(surface);
s->text_x[0] = 0;
s->text_y[0] = 0;
s->text_x[1] = s->width - 1;
s->text_y[1] = s->height - 1;
s->cursor_invalidate = 1;
qemu_console_fill_rect(QEMU_CONSOLE(s), 0, 0, surface_width(surface), surface_height(surface),
color_table_rgb[0][QEMU_COLOR_BLACK]);
y1 = s->y_displayed;
for (y = 0; y < s->height; y++) {
c = s->cells + y1 * s->width;
for (x = 0; x < s->width; x++) {
vga_putcharxy(QEMU_CONSOLE(s), x, y, c->ch,
&(c->t_attrib));
c++;
}
if (++y1 == s->total_height) {
y1 = 0;
}
}
console_show_cursor(s, 1);
dpy_gfx_update(QEMU_CONSOLE(s), 0, 0,
surface_width(surface), surface_height(surface));
}
static void console_scroll(QemuTextConsole *s, int ydelta)
{
int i, y1;
if (ydelta > 0) {
for(i = 0; i < ydelta; i++) {
if (s->y_displayed == s->y_base)
break;
if (++s->y_displayed == s->total_height)
s->y_displayed = 0;
}
} else {
ydelta = -ydelta;
i = s->backscroll_height;
if (i > s->total_height - s->height)
i = s->total_height - s->height;
y1 = s->y_base - i;
if (y1 < 0)
y1 += s->total_height;
for(i = 0; i < ydelta; i++) {
if (s->y_displayed == y1)
break;
if (--s->y_displayed < 0)
s->y_displayed = s->total_height - 1;
}
}
console_refresh(s);
}
static void kbd_send_chars(QemuTextConsole *s)
{
uint32_t len, avail;
len = qemu_chr_be_can_write(s->chr);
avail = fifo8_num_used(&s->out_fifo);
while (len > 0 && avail > 0) {
const uint8_t *buf;
uint32_t size;
buf = fifo8_pop_bufptr(&s->out_fifo, MIN(len, avail), &size);
qemu_chr_be_write(s->chr, buf, size);
len = qemu_chr_be_can_write(s->chr);
avail -= size;
}
}
/* called when an ascii key is pressed */
void qemu_text_console_handle_keysym(QemuTextConsole *s, int keysym)
{
uint8_t buf[16], *q;
int c;
uint32_t num_free;
switch(keysym) {
case QEMU_KEY_CTRL_UP:
console_scroll(s, -1);
break;
case QEMU_KEY_CTRL_DOWN:
console_scroll(s, 1);
break;
case QEMU_KEY_CTRL_PAGEUP:
console_scroll(s, -10);
break;
case QEMU_KEY_CTRL_PAGEDOWN:
console_scroll(s, 10);
break;
default:
/* convert the QEMU keysym to VT100 key string */
q = buf;
if (keysym >= 0xe100 && keysym <= 0xe11f) {
*q++ = '\033';
*q++ = '[';
c = keysym - 0xe100;
if (c >= 10)
*q++ = '0' + (c / 10);
*q++ = '0' + (c % 10);
*q++ = '~';
} else if (keysym >= 0xe120 && keysym <= 0xe17f) {
*q++ = '\033';
*q++ = '[';
*q++ = keysym & 0xff;
} else if (s->echo && (keysym == '\r' || keysym == '\n')) {
qemu_chr_write(s->chr, (uint8_t *)"\r", 1, true);
*q++ = '\n';
} else {
*q++ = keysym;
}
if (s->echo) {
qemu_chr_write(s->chr, buf, q - buf, true);
}
num_free = fifo8_num_free(&s->out_fifo);
fifo8_push_all(&s->out_fifo, buf, MIN(num_free, q - buf));
kbd_send_chars(s);
break;
}
}
static void text_console_update(void *opaque, console_ch_t *chardata)
{
QemuTextConsole *s = QEMU_TEXT_CONSOLE(opaque);
int i, j, src;
if (s->text_x[0] <= s->text_x[1]) {
src = (s->y_base + s->text_y[0]) * s->width;
chardata += s->text_y[0] * s->width;
for (i = s->text_y[0]; i <= s->text_y[1]; i ++)
for (j = 0; j < s->width; j++, src++) {
console_write_ch(chardata ++,
ATTR2CHTYPE(s->cells[src].ch,
s->cells[src].t_attrib.fgcol,
s->cells[src].t_attrib.bgcol,
s->cells[src].t_attrib.bold));
}
dpy_text_update(QEMU_CONSOLE(s), s->text_x[0], s->text_y[0],
s->text_x[1] - s->text_x[0], i - s->text_y[0]);
s->text_x[0] = s->width;
s->text_y[0] = s->height;
s->text_x[1] = 0;
s->text_y[1] = 0;
}
if (s->cursor_invalidate) {
dpy_text_cursor(QEMU_CONSOLE(s), s->x, s->y);
s->cursor_invalidate = 0;
}
}
static void text_console_resize(QemuTextConsole *t)
{
QemuConsole *s = QEMU_CONSOLE(t);
TextCell *cells, *c, *c1;
int w1, x, y, last_width, w, h;
assert(s->scanout.kind == SCANOUT_SURFACE);
w = surface_width(s->surface) / FONT_WIDTH;
h = surface_height(s->surface) / FONT_HEIGHT;
if (w == t->width && h == t->height) {
return;
}
last_width = t->width;
t->width = w;
t->height = h;
w1 = MIN(t->width, last_width);
cells = g_new(TextCell, t->width * t->total_height + 1);
for (y = 0; y < t->total_height; y++) {
c = &cells[y * t->width];
if (w1 > 0) {
c1 = &t->cells[y * last_width];
for (x = 0; x < w1; x++) {
*c++ = *c1++;
}
}
for (x = w1; x < t->width; x++) {
c->ch = ' ';
c->t_attrib = TEXT_ATTRIBUTES_DEFAULT;
c++;
}
}
g_free(t->cells);
t->cells = cells;
}
static void vc_put_lf(VCChardev *vc)
{
QemuTextConsole *s = vc->console;
TextCell *c;
int x, y1;
s->y++;
if (s->y >= s->height) {
s->y = s->height - 1;
if (s->y_displayed == s->y_base) {
if (++s->y_displayed == s->total_height)
s->y_displayed = 0;
}
if (++s->y_base == s->total_height)
s->y_base = 0;
if (s->backscroll_height < s->total_height)
s->backscroll_height++;
y1 = (s->y_base + s->height - 1) % s->total_height;
c = &s->cells[y1 * s->width];
for(x = 0; x < s->width; x++) {
c->ch = ' ';
c->t_attrib = TEXT_ATTRIBUTES_DEFAULT;
c++;
}
if (s->y_displayed == s->y_base) {
s->text_x[0] = 0;
s->text_y[0] = 0;
s->text_x[1] = s->width - 1;
s->text_y[1] = s->height - 1;
qemu_console_bitblt(QEMU_CONSOLE(s), 0, FONT_HEIGHT, 0, 0,
s->width * FONT_WIDTH,
(s->height - 1) * FONT_HEIGHT);
qemu_console_fill_rect(QEMU_CONSOLE(s), 0, (s->height - 1) * FONT_HEIGHT,
s->width * FONT_WIDTH, FONT_HEIGHT,
color_table_rgb[0][TEXT_ATTRIBUTES_DEFAULT.bgcol]);
s->update_x0 = 0;
s->update_y0 = 0;
s->update_x1 = s->width * FONT_WIDTH;
s->update_y1 = s->height * FONT_HEIGHT;
}
}
}
/* Set console attributes depending on the current escape codes.
* NOTE: I know this code is not very efficient (checking every color for it
* self) but it is more readable and better maintainable.
*/
static void vc_handle_escape(VCChardev *vc)
{
int i;
for (i = 0; i < vc->nb_esc_params; i++) {
switch (vc->esc_params[i]) {
case 0: /* reset all console attributes to default */
vc->t_attrib = TEXT_ATTRIBUTES_DEFAULT;
break;
case 1:
vc->t_attrib.bold = 1;
break;
case 4:
vc->t_attrib.uline = 1;
break;
case 5:
vc->t_attrib.blink = 1;
break;
case 7:
vc->t_attrib.invers = 1;
break;
case 8:
vc->t_attrib.unvisible = 1;
break;
case 22:
vc->t_attrib.bold = 0;
break;
case 24:
vc->t_attrib.uline = 0;
break;
case 25:
vc->t_attrib.blink = 0;
break;
case 27:
vc->t_attrib.invers = 0;
break;
case 28:
vc->t_attrib.unvisible = 0;
break;
/* set foreground color */
case 30:
vc->t_attrib.fgcol = QEMU_COLOR_BLACK;
break;
case 31:
vc->t_attrib.fgcol = QEMU_COLOR_RED;
break;
case 32:
vc->t_attrib.fgcol = QEMU_COLOR_GREEN;
break;
case 33:
vc->t_attrib.fgcol = QEMU_COLOR_YELLOW;
break;
case 34:
vc->t_attrib.fgcol = QEMU_COLOR_BLUE;
break;
case 35:
vc->t_attrib.fgcol = QEMU_COLOR_MAGENTA;
break;
case 36:
vc->t_attrib.fgcol = QEMU_COLOR_CYAN;
break;
case 37:
vc->t_attrib.fgcol = QEMU_COLOR_WHITE;
break;
/* set background color */
case 40:
vc->t_attrib.bgcol = QEMU_COLOR_BLACK;
break;
case 41:
vc->t_attrib.bgcol = QEMU_COLOR_RED;
break;
case 42:
vc->t_attrib.bgcol = QEMU_COLOR_GREEN;
break;
case 43:
vc->t_attrib.bgcol = QEMU_COLOR_YELLOW;
break;
case 44:
vc->t_attrib.bgcol = QEMU_COLOR_BLUE;
break;
case 45:
vc->t_attrib.bgcol = QEMU_COLOR_MAGENTA;
break;
case 46:
vc->t_attrib.bgcol = QEMU_COLOR_CYAN;
break;
case 47:
vc->t_attrib.bgcol = QEMU_COLOR_WHITE;
break;
}
}
}
static void vc_update_xy(VCChardev *vc, int x, int y)
{
QemuTextConsole *s = vc->console;
TextCell *c;
int y1, y2;
s->text_x[0] = MIN(s->text_x[0], x);
s->text_x[1] = MAX(s->text_x[1], x);
s->text_y[0] = MIN(s->text_y[0], y);
s->text_y[1] = MAX(s->text_y[1], y);
y1 = (s->y_base + y) % s->total_height;
y2 = y1 - s->y_displayed;
if (y2 < 0) {
y2 += s->total_height;
}
if (y2 < s->height) {
if (x >= s->width) {
x = s->width - 1;
}
c = &s->cells[y1 * s->width + x];
vga_putcharxy(QEMU_CONSOLE(s), x, y2, c->ch,
&(c->t_attrib));
invalidate_xy(s, x, y2);
}
}
static void vc_clear_xy(VCChardev *vc, int x, int y)
{
QemuTextConsole *s = vc->console;
int y1 = (s->y_base + y) % s->total_height;
if (x >= s->width) {
x = s->width - 1;
}
TextCell *c = &s->cells[y1 * s->width + x];
c->ch = ' ';
c->t_attrib = TEXT_ATTRIBUTES_DEFAULT;
vc_update_xy(vc, x, y);
}
static void vc_put_one(VCChardev *vc, int ch)
{
QemuTextConsole *s = vc->console;
TextCell *c;
int y1;
if (s->x >= s->width) {
/* line wrap */
s->x = 0;
vc_put_lf(vc);
}
y1 = (s->y_base + s->y) % s->total_height;
c = &s->cells[y1 * s->width + s->x];
c->ch = ch;
c->t_attrib = vc->t_attrib;
vc_update_xy(vc, s->x, s->y);
s->x++;
}
static void vc_respond_str(VCChardev *vc, const char *buf)
{
while (*buf) {
vc_put_one(vc, *buf);
buf++;
}
}
/* set cursor, checking bounds */
static void vc_set_cursor(VCChardev *vc, int x, int y)
{
QemuTextConsole *s = vc->console;
if (x < 0) {
x = 0;
}
if (y < 0) {
y = 0;
}
if (y >= s->height) {
y = s->height - 1;
}
if (x >= s->width) {
x = s->width - 1;
}
s->x = x;
s->y = y;
}
static void vc_putchar(VCChardev *vc, int ch)
{
QemuTextConsole *s = vc->console;
int i;
int x, y;
char response[40];
switch(vc->state) {
case TTY_STATE_NORM:
switch(ch) {
case '\r': /* carriage return */
s->x = 0;
break;
case '\n': /* newline */
vc_put_lf(vc);
break;
case '\b': /* backspace */
if (s->x > 0)
s->x--;
break;
case '\t': /* tabspace */
if (s->x + (8 - (s->x % 8)) > s->width) {
s->x = 0;
vc_put_lf(vc);
} else {
s->x = s->x + (8 - (s->x % 8));
}
break;
case '\a': /* alert aka. bell */
/* TODO: has to be implemented */
break;
case 14:
/* SI (shift in), character set 0 (ignored) */
break;
case 15:
/* SO (shift out), character set 1 (ignored) */
break;
case 27: /* esc (introducing an escape sequence) */
vc->state = TTY_STATE_ESC;
break;
default:
vc_put_one(vc, ch);
break;
}
break;
case TTY_STATE_ESC: /* check if it is a terminal escape sequence */
if (ch == '[') {
for(i=0;i<MAX_ESC_PARAMS;i++)
vc->esc_params[i] = 0;
vc->nb_esc_params = 0;
vc->state = TTY_STATE_CSI;
} else {
vc->state = TTY_STATE_NORM;
}
break;
case TTY_STATE_CSI: /* handle escape sequence parameters */
if (ch >= '0' && ch <= '9') {
if (vc->nb_esc_params < MAX_ESC_PARAMS) {
int *param = &vc->esc_params[vc->nb_esc_params];
int digit = (ch - '0');
*param = (*param <= (INT_MAX - digit) / 10) ?
*param * 10 + digit : INT_MAX;
}
} else {
if (vc->nb_esc_params < MAX_ESC_PARAMS)
vc->nb_esc_params++;
if (ch == ';' || ch == '?') {
break;
}
trace_console_putchar_csi(vc->esc_params[0], vc->esc_params[1],
ch, vc->nb_esc_params);
vc->state = TTY_STATE_NORM;
switch(ch) {
case 'A':
/* move cursor up */
if (vc->esc_params[0] == 0) {
vc->esc_params[0] = 1;
}
vc_set_cursor(vc, s->x, s->y - vc->esc_params[0]);
break;
case 'B':
/* move cursor down */
if (vc->esc_params[0] == 0) {
vc->esc_params[0] = 1;
}
vc_set_cursor(vc, s->x, s->y + vc->esc_params[0]);
break;
case 'C':
/* move cursor right */
if (vc->esc_params[0] == 0) {
vc->esc_params[0] = 1;
}
vc_set_cursor(vc, s->x + vc->esc_params[0], s->y);
break;
case 'D':
/* move cursor left */
if (vc->esc_params[0] == 0) {
vc->esc_params[0] = 1;
}
vc_set_cursor(vc, s->x - vc->esc_params[0], s->y);
break;
case 'G':
/* move cursor to column */
vc_set_cursor(vc, vc->esc_params[0] - 1, s->y);
break;
case 'f':
case 'H':
/* move cursor to row, column */
vc_set_cursor(vc, vc->esc_params[1] - 1, vc->esc_params[0] - 1);
break;
case 'J':
switch (vc->esc_params[0]) {
case 0:
/* clear to end of screen */
for (y = s->y; y < s->height; y++) {
for (x = 0; x < s->width; x++) {
if (y == s->y && x < s->x) {
continue;
}
vc_clear_xy(vc, x, y);
}
}
break;
case 1:
/* clear from beginning of screen */
for (y = 0; y <= s->y; y++) {
for (x = 0; x < s->width; x++) {
if (y == s->y && x > s->x) {
break;
}
vc_clear_xy(vc, x, y);
}
}
break;
case 2:
/* clear entire screen */
for (y = 0; y <= s->height; y++) {
for (x = 0; x < s->width; x++) {
vc_clear_xy(vc, x, y);
}
}
break;
}
break;
case 'K':
switch (vc->esc_params[0]) {
case 0:
/* clear to eol */
for(x = s->x; x < s->width; x++) {
vc_clear_xy(vc, x, s->y);
}
break;
case 1:
/* clear from beginning of line */
for (x = 0; x <= s->x && x < s->width; x++) {
vc_clear_xy(vc, x, s->y);
}
break;
case 2:
/* clear entire line */
for(x = 0; x < s->width; x++) {
vc_clear_xy(vc, x, s->y);
}
break;
}
break;
case 'm':
vc_handle_escape(vc);
break;
case 'n':
switch (vc->esc_params[0]) {
case 5:
/* report console status (always succeed)*/
vc_respond_str(vc, "\033[0n");
break;
case 6:
/* report cursor position */
sprintf(response, "\033[%d;%dR",
(s->y_base + s->y) % s->total_height + 1,
s->x + 1);
vc_respond_str(vc, response);
break;
}
break;
case 's':
/* save cursor position */
vc->x_saved = s->x;
vc->y_saved = s->y;
break;
case 'u':
/* restore cursor position */
s->x = vc->x_saved;
s->y = vc->y_saved;
break;
default:
trace_console_putchar_unhandled(ch);
break;
}
break;
}
}
}
#define TYPE_CHARDEV_VC "chardev-vc"
DECLARE_INSTANCE_CHECKER(VCChardev, VC_CHARDEV,
TYPE_CHARDEV_VC)
static int vc_chr_write(Chardev *chr, const uint8_t *buf, int len)
{
VCChardev *drv = VC_CHARDEV(chr);
QemuTextConsole *s = drv->console;
int i;
s->update_x0 = s->width * FONT_WIDTH;
s->update_y0 = s->height * FONT_HEIGHT;
s->update_x1 = 0;
s->update_y1 = 0;
console_show_cursor(s, 0);
for(i = 0; i < len; i++) {
vc_putchar(drv, buf[i]);
}
console_show_cursor(s, 1);
if (s->update_x0 < s->update_x1) {
dpy_gfx_update(QEMU_CONSOLE(s), s->update_x0, s->update_y0,
s->update_x1 - s->update_x0,
s->update_y1 - s->update_y0);
}
return len;
}
void qemu_text_console_update_cursor(void)
{
cursor_visible_phase = !cursor_visible_phase;
if (qemu_invalidate_text_consoles()) {
timer_mod(cursor_timer,
qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + CONSOLE_CURSOR_PERIOD / 2);
}
}
static void
cursor_timer_cb(void *opaque)
{
qemu_text_console_update_cursor();
}
static void text_console_invalidate(void *opaque)
{
QemuTextConsole *s = QEMU_TEXT_CONSOLE(opaque);
if (!QEMU_IS_FIXED_TEXT_CONSOLE(s)) {
text_console_resize(QEMU_TEXT_CONSOLE(s));
}
console_refresh(s);
}
static void
qemu_text_console_finalize(Object *obj)
{
}
static void
qemu_text_console_class_init(ObjectClass *oc, void *data)
{
if (!cursor_timer) {
cursor_timer = timer_new_ms(QEMU_CLOCK_REALTIME, cursor_timer_cb, NULL);
}
}
static const GraphicHwOps text_console_ops = {
.invalidate = text_console_invalidate,
.text_update = text_console_update,
};
static void
qemu_text_console_init(Object *obj)
{
QemuTextConsole *c = QEMU_TEXT_CONSOLE(obj);
fifo8_create(&c->out_fifo, 16);
c->total_height = DEFAULT_BACKSCROLL;
QEMU_CONSOLE(c)->hw_ops = &text_console_ops;
QEMU_CONSOLE(c)->hw = c;
}
static void
qemu_fixed_text_console_finalize(Object *obj)
{
}
static void
qemu_fixed_text_console_class_init(ObjectClass *oc, void *data)
{
}
static void
qemu_fixed_text_console_init(Object *obj)
{
}
static void vc_chr_accept_input(Chardev *chr)
{
VCChardev *drv = VC_CHARDEV(chr);
kbd_send_chars(drv->console);
}
static void vc_chr_set_echo(Chardev *chr, bool echo)
{
VCChardev *drv = VC_CHARDEV(chr);
drv->console->echo = echo;
}
void qemu_text_console_update_size(QemuTextConsole *c)
{
dpy_text_resize(QEMU_CONSOLE(c), c->width, c->height);
}
static void vc_chr_open(Chardev *chr,
ChardevBackend *backend,
bool *be_opened,
Error **errp)
{
ChardevVC *vc = backend->u.vc.data;
VCChardev *drv = VC_CHARDEV(chr);
QemuTextConsole *s;
unsigned width = 0;
unsigned height = 0;
if (vc->has_width) {
width = vc->width;
} else if (vc->has_cols) {
width = vc->cols * FONT_WIDTH;
}
if (vc->has_height) {
height = vc->height;
} else if (vc->has_rows) {
height = vc->rows * FONT_HEIGHT;
}
trace_console_txt_new(width, height);
if (width == 0 || height == 0) {
s = QEMU_TEXT_CONSOLE(object_new(TYPE_QEMU_TEXT_CONSOLE));
width = 80 * FONT_WIDTH;
height = 24 * FONT_HEIGHT;
} else {
s = QEMU_TEXT_CONSOLE(object_new(TYPE_QEMU_FIXED_TEXT_CONSOLE));
}
dpy_gfx_replace_surface(QEMU_CONSOLE(s), qemu_create_displaysurface(width, height));
s->chr = chr;
drv->console = s;
/* set current text attributes to default */
drv->t_attrib = TEXT_ATTRIBUTES_DEFAULT;
text_console_resize(s);
if (chr->label) {
char *msg;
drv->t_attrib.bgcol = QEMU_COLOR_BLUE;
msg = g_strdup_printf("%s console\r\n", chr->label);
qemu_chr_write(chr, (uint8_t *)msg, strlen(msg), true);
g_free(msg);
drv->t_attrib = TEXT_ATTRIBUTES_DEFAULT;
}
*be_opened = true;
}
static void vc_chr_parse(QemuOpts *opts, ChardevBackend *backend, Error **errp)
{
int val;
ChardevVC *vc;
backend->type = CHARDEV_BACKEND_KIND_VC;
vc = backend->u.vc.data = g_new0(ChardevVC, 1);
qemu_chr_parse_common(opts, qapi_ChardevVC_base(vc));
val = qemu_opt_get_number(opts, "width", 0);
if (val != 0) {
vc->has_width = true;
vc->width = val;
}
val = qemu_opt_get_number(opts, "height", 0);
if (val != 0) {
vc->has_height = true;
vc->height = val;
}
val = qemu_opt_get_number(opts, "cols", 0);
if (val != 0) {
vc->has_cols = true;
vc->cols = val;
}
val = qemu_opt_get_number(opts, "rows", 0);
if (val != 0) {
vc->has_rows = true;
vc->rows = val;
}
}
static void char_vc_class_init(ObjectClass *oc, void *data)
{
ChardevClass *cc = CHARDEV_CLASS(oc);
cc->parse = vc_chr_parse;
cc->open = vc_chr_open;
cc->chr_write = vc_chr_write;
cc->chr_accept_input = vc_chr_accept_input;
cc->chr_set_echo = vc_chr_set_echo;
}
static const TypeInfo char_vc_type_info = {
.name = TYPE_CHARDEV_VC,
.parent = TYPE_CHARDEV,
.instance_size = sizeof(VCChardev),
.class_init = char_vc_class_init,
};
void qemu_console_early_init(void)
{
/* set the default vc driver */
if (!object_class_by_name(TYPE_CHARDEV_VC)) {
type_register(&char_vc_type_info);
}
}
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