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Clean up image support and add regression tests

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This commit is contained in:
Michael Grant
2026-10-04 11:44:00 +01:00
parent c8f9c70534
commit 9ff51bd715
31 changed files with 465 additions and 633 deletions
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19
regress/image-floating-content-wipe.sh
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@@ -1,22 +1,7 @@
#!/bin/sh
# Regression test for a fixed bug: on a client detected as SIXEL-capable, a
# pane-content redraw (PANE_REDRAW) erased the image backend's rectangle
# using the redrawing pane's raw nominal geometry (wp->xoff/yoff/sx/sy)
# instead of the cells it actually owns in the current scene. When a
# floating pane occluded part of that rectangle, the erase blanked the
# floating pane's on-screen area, and since the subsequent text redraw
# correctly only refills cells the redrawing pane owns, nothing repainted
# it back in - the floating pane's content stayed blank.
#
# Fixed in screen-redraw.c:redraw_draw_pane_lines() by erasing only the
# cell ranges the pane actually owns per line (its REDRAW_SPAN_PANE spans),
# not its raw rectangle. See tmux-sixel-erase-ignores-occlusion.md and
# IMAGE-REDRAW-DISCUSSION.md for the full write-up.
#
# Confirmed by direct A/B test against this exact sequence: reliably wipes
# the floating pane's content on the unfixed code, reliably leaves it
# intact on the fixed code.
# A SIXEL pane redraw must erase only cells owned by that pane, preserving
# content in an overlapping floating pane when leaving copy mode.
PATH=/bin:/usr/bin
TERM=screen