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cfb_console: Add support for some ANSI terminal escape codes

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Add optional support for some ANSI escape sequences to the
cfb_console driver. Define CONFIG_CFB_CONSOLE_ANSI to enable
cursor moving, color reverting and clearing the cfb console
via ANSI escape codes.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
master
Pali Rohár 12 years ago committed by Tom Rini
parent 318e70e244
commit 33a35bbbe0
2 changed files with 323 additions and 9 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 4
      README
  2. 328
      drivers/video/cfb_console.c

4
README
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@ -655,6 +655,10 @@ The following options need to be configured:
additional board info beside
the logo
When CONFIG_CFB_CONSOLE_ANSI is defined, console will support
a limited number of ANSI escape sequences (cursor control,
erase functions and limited graphics rendition control).
When CONFIG_CFB_CONSOLE is defined, video console is
default i/o. Serial console can be forced with
environment 'console=serial'.

328
drivers/video/cfb_console.c
Unescape View File

@ -385,6 +385,13 @@ static u32 eorx, fgx, bgx; /* color pats */
static int cfb_do_flush_cache;
#ifdef CONFIG_CFB_CONSOLE_ANSI
static char ansi_buf[10];
static int ansi_buf_size;
static int ansi_colors_need_revert;
static int ansi_cursor_hidden;
#endif
static const int video_font_draw_table8[] = {
0x00000000, 0x000000ff, 0x0000ff00, 0x0000ffff,
0x00ff0000, 0x00ff00ff, 0x00ffff00, 0x00ffffff,
@ -768,9 +775,97 @@ static void console_back(void)
}
}
static void console_newline(void)
#ifdef CONFIG_CFB_CONSOLE_ANSI
static void console_clear(void)
{
#ifdef VIDEO_HW_RECTFILL
video_hw_rectfill(VIDEO_PIXEL_SIZE, /* bytes per pixel */
0, /* dest pos x */
video_logo_height, /* dest pos y */
VIDEO_VISIBLE_COLS, /* frame width */
VIDEO_VISIBLE_ROWS, /* frame height */
bgx /* fill color */
);
#else
memsetl(CONSOLE_ROW_FIRST, CONSOLE_SIZE, bgx);
#endif
}
static void console_cursor_fix(void)
{
if (console_row < 0)
console_row = 0;
if (console_row >= CONSOLE_ROWS)
console_row = CONSOLE_ROWS - 1;
if (console_col < 0)
console_col = 0;
if (console_col >= CONSOLE_COLS)
console_col = CONSOLE_COLS - 1;
}
static void console_cursor_up(int n)
{
console_row -= n;
console_cursor_fix();
}
static void console_cursor_down(int n)
{
console_row += n;
console_cursor_fix();
}
static void console_cursor_left(int n)
{
console_col -= n;
console_cursor_fix();
}
static void console_cursor_right(int n)
{
console_col += n;
console_cursor_fix();
}
static void console_cursor_set_position(int row, int col)
{
if (console_row != -1)
console_row = row;
if (console_col != -1)
console_col = col;
console_cursor_fix();
}
static void console_previousline(int n)
{
console_row++;
/* FIXME: also scroll terminal ? */
console_row -= n;
console_cursor_fix();
}
static void console_swap_colors(void)
{
eorx = fgx;
fgx = bgx;
bgx = eorx;
eorx = fgx ^ bgx;
}
static inline int console_cursor_is_visible(void)
{
return !ansi_cursor_hidden;
}
#else
static inline int console_cursor_is_visible(void)
{
return 1;
}
#endif
static void console_newline(int n)
{
console_row += n;
console_col = 0;
/* Check if we need to scroll the terminal */
@ -779,7 +874,7 @@ static void console_newline(void)
console_scrollup();
/* Decrement row number */
console_row--;
console_row = CONSOLE_ROWS - 1;
}
}
@ -788,11 +883,12 @@ static void console_cr(void)
console_col = 0;
}
void video_putc(const char c)
static void parse_putc(const char c)
{
static int nl = 1;
CURSOR_OFF;
if (console_cursor_is_visible())
CURSOR_OFF;
switch (c) {
case 13: /* back to first column */
@ -801,7 +897,7 @@ void video_putc(const char c)
case '\n': /* next line */
if (console_col || (!console_col && nl))
console_newline();
console_newline(1);
nl = 1;
break;
@ -810,7 +906,7 @@ void video_putc(const char c)
console_col &= ~0x0007;
if (console_col >= CONSOLE_COLS)
console_newline();
console_newline(1);
break;
case 8: /* backspace */
@ -827,11 +923,225 @@ void video_putc(const char c)
/* check for newline */
if (console_col >= CONSOLE_COLS) {
console_newline();
console_newline(1);
nl = 0;
}
}
CURSOR_SET;
if (console_cursor_is_visible())
CURSOR_SET;
}
void video_putc(const char c)
{
#ifdef CONFIG_CFB_CONSOLE_ANSI
int i;
if (c == 27) {
for (i = 0; i < ansi_buf_size; ++i)
parse_putc(ansi_buf[i]);
ansi_buf[0] = 27;
ansi_buf_size = 1;
return;
}
if (ansi_buf_size > 0) {
/*
* 0 - ESC
* 1 - [
* 2 - num1
* 3 - ..
* 4 - ;
* 5 - num2
* 6 - ..
* - cchar
*/
int next = 0;
int flush = 0;
int fail = 0;
int num1 = 0;
int num2 = 0;
int cchar = 0;
ansi_buf[ansi_buf_size++] = c;
if (ansi_buf_size >= sizeof(ansi_buf))
fail = 1;
for (i = 0; i < ansi_buf_size; ++i) {
if (fail)
break;
switch (next) {
case 0:
if (ansi_buf[i] == 27)
next = 1;
else
fail = 1;
break;
case 1:
if (ansi_buf[i] == '[')
next = 2;
else
fail = 1;
break;
case 2:
if (ansi_buf[i] >= '0' && ansi_buf[i] <= '9') {
num1 = ansi_buf[i]-'0';
next = 3;
} else if (ansi_buf[i] != '?') {
--i;
num1 = 1;
next = 4;
}
break;
case 3:
if (ansi_buf[i] >= '0' && ansi_buf[i] <= '9') {
num1 *= 10;
num1 += ansi_buf[i]-'0';
} else {
--i;
next = 4;
}
break;
case 4:
if (ansi_buf[i] != ';') {
--i;
next = 7;
} else
next = 5;
break;
case 5:
if (ansi_buf[i] >= '0' && ansi_buf[i] <= '9') {
num2 = ansi_buf[i]-'0';
next = 6;
} else
fail = 1;
break;
case 6:
if (ansi_buf[i] >= '0' && ansi_buf[i] <= '9') {
num2 *= 10;
num2 += ansi_buf[i]-'0';
} else {
--i;
next = 7;
}
break;
case 7:
if ((ansi_buf[i] >= 'A' && ansi_buf[i] <= 'H')
|| ansi_buf[i] == 'J'
|| ansi_buf[i] == 'K'
|| ansi_buf[i] == 'h'
|| ansi_buf[i] == 'l'
|| ansi_buf[i] == 'm') {
cchar = ansi_buf[i];
flush = 1;
} else
fail = 1;
break;
}
}
if (fail) {
for (i = 0; i < ansi_buf_size; ++i)
parse_putc(ansi_buf[i]);
ansi_buf_size = 0;
return;
}
if (flush) {
if (!ansi_cursor_hidden)
CURSOR_OFF;
ansi_buf_size = 0;
switch (cchar) {
case 'A':
/* move cursor num1 rows up */
console_cursor_up(num1);
break;
case 'B':
/* move cursor num1 rows down */
console_cursor_down(num1);
break;
case 'C':
/* move cursor num1 columns forward */
console_cursor_right(num1);
break;
case 'D':
/* move cursor num1 columns back */
console_cursor_left(num1);
break;
case 'E':
/* move cursor num1 rows up at begin of row */
console_previousline(num1);
break;
case 'F':
/* move cursor num1 rows down at begin of row */
console_newline(num1);
break;
case 'G':
/* move cursor to column num1 */
console_cursor_set_position(-1, num1-1);
break;
case 'H':
/* move cursor to row num1, column num2 */
console_cursor_set_position(num1-1, num2-1);
break;
case 'J':
/* clear console and move cursor to 0, 0 */
console_clear();
console_cursor_set_position(0, 0);
break;
case 'K':
/* clear line */
if (num1 == 0)
console_clear_line(console_row,
console_col,
CONSOLE_COLS-1);
else if (num1 == 1)
console_clear_line(console_row,
0, console_col);
else
console_clear_line(console_row,
0, CONSOLE_COLS-1);
break;
case 'h':
ansi_cursor_hidden = 0;
break;
case 'l':
ansi_cursor_hidden = 1;
break;
case 'm':
if (num1 == 0) { /* reset swapped colors */
if (ansi_colors_need_revert) {
console_swap_colors();
ansi_colors_need_revert = 0;
}
} else if (num1 == 7) { /* once swap colors */
if (!ansi_colors_need_revert) {
console_swap_colors();
ansi_colors_need_revert = 1;
}
}
break;
}
if (!ansi_cursor_hidden)
CURSOR_SET;
}
} else {
parse_putc(c);
}
#else
parse_putc(c);
#endif
}
void video_puts(const char *s)

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