mirrors/foot
1
0
Fork 0
mirror of https://codeberg.org/dnkl/foot.git synced 2026-03-24 09:05:48 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

csi: invert the meaning of DECSDM

Browse source 
There has been some confusion whether enabling DECSDM (private mode
80) enables or disables sixel scrolling.

Foot currently enables scrolling when DECSDM is set, and this patch
changes this, such that setting DECSDM now *disables* scrolling.

The confusion is apparently due to a documentation error in the VT340
manual, as described in
https://github.com/dankamongmen/notcurses/issues/1782#issuecomment-863603641.

And that makes sense, in a way: the SDM in DECSDM stands for Sixel
Display Mode. I.e. it stands to reason that enabling that disables
scrolling.

Anyway, this lead to https://github.com/hackerb9/lsix/issues/41, where
it was eventually proven (by testing on a real VT340), that foot, and
a large number of other terminals (including XTerm) has it wrong:
https://github.com/hackerb9/lsix/issues/41#issuecomment-873269599.
This commit is contained in:
Daniel Eklöf 2021-07-14 19:17:44 +02:00
parent 7afc4c8037
commit fcd9897342
No known key found for this signature in database
GPG key ID: 5BBD4992C116573F
3 changed files with 7 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

2
CHANGELOG.md
View file

@ -39,6 +39,8 @@
* Non-empty lines are now considered to have a hard linebreak,
_unless_ an actual word-wrap is inserted.
* Setting `DECSDM` now _disables_ sixel scrolling, while resetting it
_enables_ scrolling (https://codeberg.org/dnkl/foot/issues/631).
### Deprecated