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Date: Tue, 01 Jul 2008 16:38:26 +0100
From: Stefano Stabellini <stefano.stabellini@...citrix.com>
To: linux-kernel@...r.kernel.org
CC: Stefano Stabellini <Stefano.Stabellini@...citrix.com>
Subject: [PATCH 2 of 2] fbcon: simple text blinking implementation
I am using the flashcursor function to scan the buffer for blinking text.
For the sake of efficiency I added a simple flag mechanism to disable the scan
when I am sure that there are not blinking characters on the screen.
Signed-off-by: stefano.stabellini@...citrix.com
---
drivers/video/console/fbcon.c | 62 +++++++++++++++++++++++++++++++++-------
1 files changed, 51 insertions(+), 11 deletions(-)
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 97aff8d..163b37a 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -152,6 +152,8 @@ static int fbcon_has_sysfs;
static const struct consw fb_con;
+static int blink_flag = 1;
+
#define CM_SOFTBACK (8)
#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
@@ -402,24 +404,58 @@ static void fb_flashcursor(struct work_struct *work)
struct vc_data *vc = NULL;
int c;
int mode;
+ unsigned short *s;
+ int x = 0, y = 0;
+ static int show_blink = 1;
acquire_console_sem();
if (ops && ops->currcon != -1)
vc = vc_cons[ops->currcon].d;
if (!vc || !CON_IS_VISIBLE(vc) ||
- registered_fb[con2fb_map[vc->vc_num]] != info ||
- vc->vc_deccm != 1) {
+ registered_fb[con2fb_map[vc->vc_num]] != info) {
release_console_sem();
return;
}
p = &fb_display[vc->vc_num];
- c = scr_readw((u16 *) vc->vc_pos);
- mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
- CM_ERASE : CM_DRAW;
- ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
- get_color(vc, info, c, 0));
+ if (vc->vc_deccm == 1 && !(vc->vc_cursor_type & 0x10)) {
+ c = scr_readw((u16 *) vc->vc_pos);
+ mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
+ CM_ERASE : CM_DRAW;
+ ops->cursor(vc, info, mode, softback_lines,
+ get_color(vc, info, c, 1),
+ get_color(vc, info, c, 0));
+ }
+
+ if (vc->vc_hi_font_mask || !blink_flag) {
+ release_console_sem();
+ return;
+ }
+ if (!softback_lines)
+ s = (u16 *) vc->vc_origin;
+ else
+ s = (u16 *) softback_curr;
+ while (y < vc->vc_rows) {
+ while (x < vc->vc_cols) {
+ c = scr_readw(s);
+ if (attr_blink(c)) {
+ blink_flag = 1;
+ if (!show_blink)
+ c = (c & 0xf4ff) | (attr_bgcol(12, c) << 8);
+ fbcon_putc(vc, c, y, x);
+ }
+ s++;
+ x++;
+ }
+ x = 0;
+ y++;
+ if (s == (u16 *) softback_end)
+ s = (u16 *) softback_buf;
+ if (s == (u16 *) softback_in)
+ s = (u16 *) vc->vc_origin;
+ }
+ show_blink = show_blink ? 0 : 1;
release_console_sem();
}
@@ -1331,6 +1367,8 @@ static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
struct display *p = &fb_display[vc->vc_num];
struct fbcon_ops *ops = info->fbcon_par;
+ if (!vc->vc_hi_font_mask && (vc->vc_attr & 0x80))
+ blink_flag = 1;
if (!fbcon_is_inactive(vc, info))
ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
get_color(vc, info, scr_readw(s), 1),
@@ -1350,6 +1388,7 @@ static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
+ blink_flag = 1;
if (!fbcon_is_inactive(vc, info))
ops->clear_margins(vc, info, bottom_only);
}
@@ -1364,10 +1403,7 @@ static void fbcon_cursor(struct vc_data *vc, int mode)
if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
return;
- if (vc->vc_cursor_type & 0x10)
- fbcon_del_cursor_timer(info);
- else
- fbcon_add_cursor_timer(info);
+ fbcon_add_cursor_timer(info);
ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
if (mode & CM_SOFTBACK) {
@@ -1860,6 +1896,7 @@ static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
return -EINVAL;
fbcon_cursor(vc, CM_ERASE);
+ blink_flag = 1;
/*
* ++Geert: Only use ywrap/ypan if the console is in text mode
@@ -2074,6 +2111,8 @@ static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
if (!width || !height)
return;
+ blink_flag = 1;
+
/* Split blits that cross physical y_wrap case.
* Pathological case involves 4 blits, better to use recursive
* code rather than unrolled case
@@ -2811,6 +2850,7 @@ static int fbcon_scrolldelta(struct vc_data *vc, int lines)
struct display *disp = &fb_display[fg_console];
int offset, limit, scrollback_old;
+ blink_flag = 1;
if (softback_top) {
if (vc->vc_num != fg_console)
return 0;
--
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