* 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@gmail.com --- Changes in v4: - No changes
Changes in v3: - Fixed multiline comments
Changes in v2: - 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)