[U-Boot] [PATCH v3 4/5] cfb_console: Add support for some ANSI terminal escape codes
Pali Rohár
pali.rohar at gmail.com
Sat Oct 13 21:31:59 CEST 2012
* This patch add support for move cursor, reverse colors and clear console
via ANSI espace codes in cfb_console driver
* ANSI escape codes can be enabled/disabled via CONFIG_CFB_CONSOLE_ANSI
Signed-off-by: Pali Rohár <pali.rohar at gmail.com>
---
Changes since v2:
- Fixed multiline comments
Changes since v1:
- Added support ANSI code show/hide cursor
- Added info to README
Changes since original version:
- Fixed commit message
README | 3 +
drivers/video/cfb_console.c | 313 +++++++++++++++++++++++++++++++++++++++++--
2 files changed, 307 insertions(+), 9 deletions(-)
diff --git a/README b/README
index 9804cea..d45a91d 100644
--- a/README
+++ b/README
@@ -655,6 +655,9 @@ The following options need to be configured:
additional board info beside
the logo
+ When CONFIG_CFB_CONSOLE_ANSI is defined, console will have
+ ANSI terminal support. Needed for CONFIG_CMDLINE_EDITING.
+
When CONFIG_CFB_CONSOLE is defined, video console is
default i/o. Serial console can be forced with
environment 'console=serial'.
diff --git a/drivers/video/cfb_console.c b/drivers/video/cfb_console.c
index 9f7794f..3ed96d3 100644
--- a/drivers/video/cfb_console.c
+++ b/drivers/video/cfb_console.c
@@ -385,6 +385,11 @@ static u32 eorx, fgx, bgx; /* color pats */
static int cfb_do_flush_cache;
+static char ansi_buf[10] = { 0, };
+static int ansi_buf_size;
+static int ansi_colors_need_revert;
+static int ansi_cursor_hidden;
+
static const int video_font_draw_table8[] = {
0x00000000, 0x000000ff, 0x0000ff00, 0x0000ffff,
0x00ff0000, 0x00ff00ff, 0x00ffff00, 0x00ffffff,
@@ -612,6 +617,14 @@ static void video_putchar(int xx, int yy, unsigned char c)
video_drawchars(xx, yy + video_logo_height, &c, 1);
}
+static void console_swap_colors(void)
+{
+ eorx = fgx;
+ fgx = bgx;
+ bgx = eorx;
+ eorx = fgx ^ bgx;
+}
+
#if defined(CONFIG_CONSOLE_CURSOR) || defined(CONFIG_VIDEO_SW_CURSOR)
static void video_set_cursor(void)
{
@@ -695,6 +708,21 @@ static void memcpyl(int *d, int *s, int c)
}
#endif
+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_clear_line(int line, int begin, int end)
{
#ifdef VIDEO_HW_RECTFILL
@@ -768,9 +796,54 @@ static void console_back(void)
}
}
-static void console_newline(void)
+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_newline(int n)
{
- console_row++;
+ console_row += n;
console_col = 0;
/* Check if we need to scroll the terminal */
@@ -779,20 +852,28 @@ static void console_newline(void)
console_scrollup();
/* Decrement row number */
- console_row--;
+ console_row = CONSOLE_ROWS-1;
}
}
+static void console_previewsline(int n)
+{
+ /* FIXME: also scroll terminal ? */
+ console_row -= n;
+ console_cursor_fix();
+}
+
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 (!ansi_cursor_hidden)
+ CURSOR_OFF;
switch (c) {
case 13: /* back to first column */
@@ -801,7 +882,7 @@ 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 +891,7 @@ 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 +908,225 @@ void video_putc(const char c)
/* check for newline */
if (console_col >= CONSOLE_COLS) {
- console_newline();
+ console_newline(1);
nl = 0;
}
}
- CURSOR_SET;
+
+ if (!ansi_cursor_hidden)
+ 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_previewsline(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)
--
1.7.9.5
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