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Code Issues Releases Activity

vt(4): When creating a window buffer, fill it entirely

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... not just the visible part.

This fixes a bug where, when switching from eg. vt_vga to vt_fb (ie. the
resolution goes up), the originally hidden, uninitialized area of the
buffer is displayed on the screen. This leads to a missing text cursor
when it's over an unitialized area.

This was also visible when selecting text: the uninitialized area was
not highlighted.

Internally, this area was zeroed: characters were all 0x00000000,
meaning the foreground and background color was black. Now, everything
is filled with a space with a gray foreground color, like the visible
area.

While here, remove the check for the mute flag and always use
TERMINAL_NORM_ATTR as the character attribute (ie. gray foreground,
black background).

MFC after:	1 week
This commit is contained in:
Jean-Sébastien Pédron 2014-08-26 17:48:05 +00:00
parent 9452b5eda9
commit cb81897a72
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=270667
1 changed files with 3 additions and 3 deletions
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6
sys/dev/vt/vt_buf.c
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@ -410,9 +410,9 @@ vtbuf_init_early(struct vt_buf *vb)
vtbuf_init_rows(vb);
rect.tr_begin.tp_row = rect.tr_begin.tp_col = 0;
rect.tr_end = vb->vb_scr_size;
vtbuf_fill(vb, &rect, VTBUF_SPACE_CHAR((boothowto & RB_MUTE) == 0 ?
TERMINAL_KERN_ATTR : TERMINAL_NORM_ATTR));
rect.tr_end.tp_col = vb->vb_scr_size.tp_col;
rect.tr_end.tp_row = vb->vb_history_size;
vtbuf_fill(vb, &rect, VTBUF_SPACE_CHAR(TERMINAL_NORM_ATTR));
vtbuf_make_undirty(vb);
if ((vb->vb_flags & VBF_MTX_INIT) == 0) {
mtx_init(&vb->vb_lock, "vtbuf", NULL, MTX_SPIN);