Commit Graph

5 Commits

Author SHA1 Message Date
mycroft 73ac8c709b Add a concept of the `background attribute'. This is the same as the
current attribute, but has all non-color flags turned off.  Use this when
doing erasure, as this allows us to optimize repainting in curses.

XXX The way the default attribute is handled is totally bogus and needs to
be fixed.
2000-04-28 21:56:16 +00:00
drochner 3a08ae9402 always use unsigned numbers for screen positions (for sanity - the libkern
min() et al. did unsigned comparisions before)
make ROWS_ABOVE / ROWS_BELOW return signed values, the negative results
occur if the cursor is outside the scrolling region
1998-12-04 20:48:04 +00:00
drochner 8e12b6c020 stricter parameter check for scrolling regions
(PR kern/5954 by Dave Huang <khym@bga.com>)
1998-08-12 20:04:12 +00:00
drochner bbb4f765cc Improvements to the VT100 emulation:
-display DEC special graphics and DEC technical characters as far as
  possible
-implement the font switching controls (need documentation!)
-behave well if double-width characters are requested
-simplify the state machine: store CSI command modifiers in variables
  instead of dedicating own states to each of them
1998-06-26 21:20:34 +00:00
drochner 68aabb6d21 First cut on a VT100 emulation.
It should be able to parse escape sequences up to VT300, but not everything
is implemented. Most notably, there is no font handling - all displayable
characters are handed to the graphics driver. To solve this, a serious
interface change to the graphics driver is needed (Unicode?).
1998-06-20 19:17:47 +00:00