Michael Grant efbd09e101 sixel: add sixel-region-scrolling to trust the terminal on scroll ...

There is no way to query a terminal for whether it moves SIXEL image
content along with the rest of a scrolling region, so tmux always
redrew the image after every scroll rather than assuming the terminal
did it for free the way Kitty placements already are (IMAGE_BACKEND_
SCROLLS). Add a server option, default on, that lets sixel opt into the
same trust; image_backend_flags() now ORs SCROLLS in for the sixel
backend when it's set.

Splitting SCROLLS out surfaced a second, unrelated property the two
image_backend_flags() checks had been conflating: whether a backend
also respects its own cell boundaries rather than bleeding pixels onto
neighbouring rows, which is what the "redraw a pane's border-status
after a GRAPHICAL-only redraw" guard in screen-redraw.c was actually
testing for. Give that its own IMAGE_BACKEND_CLIPPED flag (kitty only)
so turning sixel-region-scrolling on doesn't also disable that
unrelated border-status protection.

Includes a regress test proving the scroll-skip decision is wired
correctly with the option on and off, and a manual visual test
(tools/sixel-scroll-region-test.sh + tools/sixel-ruler.six, a numbered
colour-band SIXEL image) for checking real terminals by eye, since nothing
here can verify what a given terminal actually renders.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

2026-09-20 22:39:43 +01:00

..

conf

Change a couple of regress configs that are incorret and only work because of

2026-07-05 14:36:47 +01:00

screen-redraw-results

Add rounded border tests.

2026-09-11 11:17:35 +01:00

alerts.sh

Test for 5599.

2026-09-20 09:19:35 +01:00

am-terminal.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

border-arrows.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

buffers.sh

Check for buffer write error.

2026-08-28 08:56:12 +01:00

capture-pane-hyperlink.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

capture-pane-sgr0.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

capture-pane-time.sh

capture-pane -I test.

2026-09-08 08:32:05 +01:00

cfg-client-lost.sh

Remove +x.

2026-09-01 20:52:44 +01:00

check-names.sh

regress: give check-names.sh a clean shell

2026-09-20 22:38:57 +01:00

choose-buffer.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

choose-client.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

choose-tree.sh

Some more regress tests.

2026-09-02 11:16:47 +01:00

clear-on-attach.sh

Fix error in test.

2026-09-02 12:32:29 +01:00

client-key-order-focus.sh

Add some more tests for recent stuff.

2026-09-01 21:55:50 +01:00

clock-mode.sh

Some more regress tests.

2026-09-02 11:16:47 +01:00

cmd-template-replace.sh

cmd_template_replace test.

2026-07-17 09:29:59 +01:00

codepoint-widths.sh

Tests for 5602 and for run-shell -c.

2026-09-20 09:11:24 +01:00

combine-test.result

FIx combine test again...

2025-12-07 22:11:45 +00:00

combine-test.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

command-alias.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

command-order.sh

Do not reuse sockets so much to avoid problems with slow server shutdown.

2026-07-12 22:03:16 +01:00

conf-syntax.sh

Do not reuse sockets so much to avoid problems with slow server shutdown.

2026-07-12 22:03:16 +01:00

confirm-before-lock.sh

Some more regress tests.

2026-09-02 11:16:47 +01:00

control-client-exit-stalled.sh

Remove +x.

2026-09-01 20:52:44 +01:00

control-client-exit.sh

Add a regression test for output queued to exiting control clients.

2026-07-10 07:54:21 -07:00

control-client-new-layouts.sh

Test for new-layouts flag.

2026-09-08 11:27:25 +01:00

control-client-popup.sh

Add some more tests for recent stuff.

2026-09-01 21:55:50 +01:00

control-client-run-shell-exit.sh

Test for late run-shell on a client that has exited.

2026-09-03 22:39:09 +01:00

control-client-sanity.sh

Fix tests.

2026-09-10 12:00:01 +01:00

control-client-size.sh

Extend control client size test.

2026-07-17 09:37:50 +01:00

control-client-wait-exit.sh

Test for wait exit, GitHub issue 5356 from Ben Maurer.

2026-07-10 16:45:58 +01:00

control-notify-events.sh

Add regress tests for events code.

2026-07-13 10:23:38 +01:00

control-notify-guard.sh

Remove +x.

2026-09-01 20:52:44 +01:00

control-subscriptions.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

copy-mode-commands.sh

Some more regress tests.

2026-09-02 11:16:47 +01:00

copy-mode-redraw.sh

More copy mode tests.

2026-07-14 12:05:06 +01:00

copy-mode-scroll-exit.sh

Add test from xiaomublue at gmail dot com.

2026-07-09 08:56:06 +01:00

copy-mode-selection-mode.sh

Add some more tests for recent stuff.

2026-09-01 21:55:50 +01:00

copy-mode-selection-scroll.sh

Add scroll regress.

2026-07-13 11:32:28 +01:00

copy-mode-test-emacs.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

copy-mode-test-vi.sh

Sleep after kill.

2026-08-03 09:53:50 +01:00

copy-mode-test.txt

More accurate vi(1) word navigation in copy mode and on the status line. This

2021-05-13 08:49:58 +01:00

copy-mode-unicode-whitespace.sh

Remove +x.

2026-09-01 20:52:44 +01:00

cursor-test1.result

Add cursor regression tests.

2019-04-02 09:44:28 +01:00

cursor-test1.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

cursor-test2.result

Add cursor regression tests.

2019-04-02 09:44:28 +01:00

cursor-test2.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

cursor-test3.result

Add cursor regression tests.

2019-04-02 09:44:28 +01:00

cursor-test3.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

cursor-test4.result

Add cursor regression tests.

2019-04-02 09:44:28 +01:00

cursor-test4.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

cursor-test.txt

Add cursor regression tests.

2019-04-02 09:44:28 +01:00

customize-mode.sh

Test hook time in customize mode.

2026-07-28 11:36:03 +01:00

decrqm-sync.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

display-panes.sh

Extend test.

2026-07-19 20:58:20 +01:00

environ-update.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

environ.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

find-window.sh

Some more regress tests.

2026-09-02 11:16:47 +01:00

floating-pane-drag-ghost.sh

md-join-pane, cmd-split-window, cmd-resize-pane: use shared floating-pane

2026-08-22 16:53:08 +01:00

floating-pane-drag-scrollbar-strip.sh

md-join-pane, cmd-split-window, cmd-resize-pane: use shared floating-pane

2026-08-22 16:53:08 +01:00

floating-pane-geometry.sh

Test for resizing floating panes, from Noam Stolero.

2026-09-11 09:16:55 +01:00

floating-pane-status-format.sh

regress: add Michael K. Darling's damage/redraw regression tests

2026-08-25 10:14:49 +01:00

format-animation.sh

Add test for A: modifier, from Fernando Daciuk.

2026-07-22 14:17:22 +01:00

format-fuzzy.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

format-modifiers.sh

t/d test.

2026-07-08 12:36:19 +01:00

format-mouse.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

format-render-contexts.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

format-strings.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

format-variables.sh

Add some more tests for recent stuff.

2026-09-01 21:55:50 +01:00

has-session-return.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

hooks-after.sh

Add regress tests for events code.

2026-07-13 10:23:38 +01:00

hooks-lifecycle.sh

Add regress tests for events code.

2026-07-13 10:23:38 +01:00

hooks-notify.sh

Test for exit status.

2026-09-03 20:12:44 +01:00

hooks.sh

Tests for hooks time and count.

2026-07-28 08:08:26 +01:00

if-shell-error.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

if-shell-nested.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

if-shell-TERM.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

image-border-status-wipe.sh

Fix pane-border-status not being redrawn properly.

2026-08-31 16:49:32 +01:00

image-floating-content-wipe.sh

screen-redraw: erase only cells a pane owns, not its raw rectangle

2026-08-25 11:23:52 +01:00

image-resize-width-recovery.sh

image: extend existing placements when a pane grows wider

2026-08-25 11:24:14 +01:00

image-scroll-off-recovery.sh

image: keep the scrolled-off portion of a placement instead of discarding it

2026-08-25 11:24:14 +01:00

image-selection-noflash.sh

window-copy: avoid erasing and needlessly re-flashing images during copy-mode redraws

2026-08-25 11:24:14 +01:00

image-sixel-region-scroll.sh

sixel: add sixel-region-scrolling to trust the terminal on scroll

2026-09-20 22:39:43 +01:00

image-support.sh

regress: fix contradictory terminal-features assertions in image-support.sh

2026-08-25 11:23:52 +01:00

input-common.inc

Test for overlong runs of combining characters, GitHub issue 5434.

2026-07-26 10:02:31 +01:00

input-cursor.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-edit.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-keys.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

input-malformed.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-modes.sh

Fix a merge and add test bits.

2026-07-21 08:00:39 +01:00

input-osc.sh

Title stack test.

2026-07-26 10:21:01 +01:00

input-raw-controls.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-raw-cursor.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-raw-edit.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-raw-history.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-raw-reflow.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-raw-scroll.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-raw-sgr.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-raw-unicode.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-raw-wrap.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-reflow-stress.sh

Tweak test.

2026-07-09 09:39:44 +01:00

input-replies.sh

regress: update input-replies.sh's primary DA reply for ENABLE_IMAGES

2026-09-20 22:39:09 +01:00

input-requests.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

input-scroll.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-sgr.sh

Add tests for input path.

2026-07-02 10:26:25 +01:00

input-unicode.sh

Test for overlong runs of combining characters, GitHub issue 5434.

2026-07-26 10:02:31 +01:00

json.sh

JSON test.

2026-09-08 09:36:26 +01:00

kill-session-process-exit.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

kill-session-zoomed.sh

Regress test for 5591 and another one I forget.

2026-09-20 08:44:56 +01:00

layout-custom.sh

Change tests for 0000, for invalid layouts.

2026-09-20 09:37:59 +01:00

layout-nesting-limit.sh

Test for v1 nesting limit, based on a changed from Afonso Januário.

2026-09-09 10:01:32 +01:00

layout-set.sh

Some more regress tests.

2026-09-02 11:16:47 +01:00

lifecycle-deferred.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

list-commands.sh

Some more regress tests.

2026-09-02 11:16:47 +01:00

Makefile

Turn on ASAN for macOS regress.

2026-07-12 20:59:11 +01:00

menu-mouse.sh

Add test for mouse menu position.

2026-07-28 14:18:18 +01:00

modal-pane.sh

Modal pane test changes.

2026-09-11 09:10:14 +01:00

mode-kill.sh

Remove +x.

2026-09-01 20:52:44 +01:00

mode-mutation.sh

Add a break-pane test for customize mode.

2026-08-17 08:06:31 +01:00

monkey-2.sixel.txt

Add missing regression test files.

2026-08-25 11:22:26 +01:00

new-pane-mouse.sh

Update test.

2026-07-22 20:24:21 +01:00

new-session-base-index.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

new-session-command.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

new-session-environment.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

new-session-no-client.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

new-session-size.sh

Do not reuse sockets so much to avoid problems with slow server shutdown.

2026-07-12 22:03:16 +01:00

new-window-command.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

options-array.sh

Show options tests.

2026-07-23 08:06:09 +01:00

options-scope.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

options-values.sh

Add rounded border tests.

2026-09-11 11:17:35 +01:00

osc-11colours.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

pane-ops.sh

Fix tests.

2026-09-10 12:00:01 +01:00

pipe-pane.sh

Tweak times for macOS.

2026-08-05 08:26:10 +01:00

popup-drag-pane-prompt.sh

regress: add Michael K. Darling's damage/redraw regression tests

2026-08-25 10:14:49 +01:00

popup-drag-redraw.sh

regress: add Michael K. Darling's damage/redraw regression tests

2026-08-25 10:14:49 +01:00

popup-drag-status-line.sh

regress: add Michael K. Darling's damage/redraw regression tests

2026-08-25 10:14:49 +01:00

popup-drag-wide-character.sh

regress: add Michael K. Darling's damage/redraw regression tests

2026-08-25 10:14:49 +01:00

prompt-keys.sh

Test for invalid prompt.

2026-09-09 08:53:51 +01:00

prompt-mechanics.sh

Add regress tests for events code.

2026-07-13 10:23:38 +01:00

prompt-words-history.sh

Some more regress tests.

2026-09-02 11:16:47 +01:00

redraw-damage-only.sh

regress: add Michael K. Darling's damage/redraw regression tests

2026-08-25 10:14:49 +01:00

redraw-multiclient.sh

regress: add Michael K. Darling's damage/redraw regression tests

2026-08-25 10:14:49 +01:00

redraw-screen-write.sh

regress: add Michael K. Darling's damage/redraw regression tests

2026-08-25 10:14:49 +01:00

respawn-pane-control-lag.sh

Add test for GitHub issue 5498 from Alex Rattray.

2026-08-18 08:45:11 +01:00

run-shell-cwd.sh

Tests for 5602 and for run-shell -c.

2026-09-20 09:11:24 +01:00

run-shell-output.sh

Test run-shell if killed.

2026-07-26 16:08:58 +01:00

screen-redraw-bidi.sh

Tweak BIDI test.

2026-07-12 23:18:47 +01:00

screen-redraw-cache.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

screen-redraw-fill-character.sh

fill-character test bits.

2026-07-23 10:38:27 +01:00

screen-redraw-floating.sh

Add rounded border tests.

2026-09-11 11:17:35 +01:00

screen-redraw-indicators.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

screen-redraw-menus.sh

Add menu tests.

2026-07-14 22:09:52 +01:00

screen-redraw-outside.sh

Tests of border.

2026-09-09 09:32:14 +01:00

screen-redraw-popups.sh

Do not reuse sockets so much to avoid problems with slow server shutdown.

2026-07-12 22:03:16 +01:00

screen-redraw-scrollbars-auto-hide.sh

Fix tests for macOS.

2026-09-02 08:43:21 +01:00

screen-redraw-scrollbars.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

screen-redraw-status.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

screen-redraw-tiled.sh

Bump a time limit.

2026-07-13 07:08:05 +01:00

screen-redraw-window-style.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

server-access.sh

Add a couple more tests.

2026-09-01 22:07:08 +01:00

server-socket-error.sh

Remove +x.

2026-09-01 20:52:44 +01:00

session-group-resize.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

session-ops.sh

detach-on-destroy next/previous tests.

2026-07-08 09:16:50 +01:00

set-hook-B.sh

Tests for hooks time and count.

2026-07-28 08:08:26 +01:00

set-hook-E.sh

Remove +x.

2026-09-01 20:52:44 +01:00

set-hook-R.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

show-options-output.sh

Show options tests.

2026-07-23 08:06:09 +01:00

style-trim.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

switch-client-redraw.sh

regress: add Michael K. Darling's damage/redraw regression tests

2026-08-25 10:14:49 +01:00

switch-mode.sh

Add a couple more tests.

2026-09-01 22:07:08 +01:00

sync-output-atomic.sh

Fix socket names for macOS.

2026-08-18 08:23:16 +01:00

sync-output-cursor.sh

Regress test for cursor updates.

2026-09-01 20:51:20 +01:00

tab-cell-background.sh

Remove +x.

2026-09-01 20:52:44 +01:00

targets-panes.sh

Tests from GitHub issue 5576.

2026-09-07 13:05:38 +01:00

targets.sh

Tests from GitHub issue 5576.

2026-09-07 13:05:38 +01:00

terminal-feature-utf8.sh

Add some more tests for recent stuff.

2026-09-01 21:55:50 +01:00

theme-report.sh

Remove +x.

2026-09-01 20:52:44 +01:00

tty-draw-line.sh

Regress for GitHub issue 5511 from Francesc Rosas.

2026-08-21 10:54:29 +01:00

tty-keys.sh

Regress test for 5591 and another one I forget.

2026-09-20 08:44:56 +01:00

utf8-test.result

Remove a char which differs between platforms.

2026-07-01 18:43:01 +01:00

utf8-test.sh

Shorten all socket names because macOS is stupid.

2026-07-06 11:50:58 +01:00

UTF-8-test.txt

Remove a char which differs between platforms.

2026-07-01 18:43:01 +01:00

wait-for-E.sh

Add regress tests for events code.

2026-07-13 10:23:38 +01:00

window-ops.sh

Test for -S from Mazunki Hoksaas.

2026-09-03 22:04:34 +01:00