Add missing regression test files.

regress/image-support.sh

@@ -0,0 +1,92 @@
+#!/bin/sh
+
+# Grid-resident image markers: Kitty input, history, copy and overwrite.
+
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -Limage$$ -f/dev/null"
+TMUX2="$TEST_TMUX -Limage-client$$ -f/dev/null"
+$TMUX kill-server 2>/dev/null
+$TMUX2 kill-server 2>/dev/null
+
+TMP=$(mktemp)
+FIXTURE=$(pwd)/monkey-2.sixel.txt
+trap "$TMUX kill-server 2>/dev/null; $TMUX2 kill-server 2>/dev/null; rm -f $TMP" 0 1 15
+
+$TMUX new-session -d -x 20 -y 8 "
+	printf '\033_Ga=T,q=2,f=32,s=2,v=2,c=2,r=2,m=1;/wAA/wD/\033\\'
+	printf '\033_Gm=0;AP8AAP///////w==\033\\'
+	i=0
+	while [ \$i -lt 10 ]; do printf '\nline-%d' \$i; i=\$((i + 1)); done
+	sleep 10"
+
+sleep 1
+[ "$($TMUX display-message -p '#{image_support}')" = 0 ] && exit 0
+
+# Images scroll as grid cells, while capture output contains ordinary spaces.
+[ "$($TMUX display-message -p '#{history_size}')" -gt 0 ] || exit 1
+$TMUX capture-pane -pS- >$TMP || exit 1
+grep '_G' $TMP >/dev/null && exit 1
+
+# Copy mode duplicates the backing grid, including image marker references.
+$TMUX copy-mode || exit 1
+$TMUX send-keys -X history-top || exit 1
+$TMUX capture-pane -p >$TMP || exit 1
+$TMUX send-keys -X cancel || exit 1
+
+# Ordinary text overwrites marker cells through the normal grid write path.
+$TMUX new-window -d "
+	printf '\033_Ga=T,q=2,f=32,s=2,v=2,c=2,r=2;/wAA/wD/AP8AAP///////w==\033\\'
+	printf '\033[HXY'
+	sleep 10"
+sleep 1
+[ "$($TMUX capture-pane -pt:1 -S0 -E0)" = "XY" ] || exit 1
+
+# The protocol default is transmit-only; a later placement uses the retained
+# immutable image and advances by the same canonical one-cell footprint.
+$TMUX new-window -d "
+	printf '\033_Gq=2,f=32,s=1,v=1,c=1,r=1,i=9;/wAA/w==\033\\'
+	printf '\033_Ga=p,q=2,i=9\033\\'
+	printf '\033_Ga=d,d=I,q=2,i=9\033\\'
+	sleep 10"
+sleep 1
+[ "$($TMUX display-message -pt:2 '#{cursor_y}')" = 1 ] || exit 1
+
+# SIXEL input reaches the same grid marker and copy-mode paths.
+$TMUX new-window -d "cat '$FIXTURE'; sleep 10"
+sleep 1
+[ "$($TMUX display-message -pt:3 '#{cursor_y}')" -gt 0 ] || exit 1
+$TMUX copy-mode -t:3 || exit 1
+$TMUX send-keys -t:3 -X history-top || exit 1
+$TMUX capture-pane -pt:3 >$TMP || exit 1
+
+# A client without an image feature gets the brightness-based ASCII backend.
+$TMUX kill-server 2>/dev/null
+$TMUX2 new-session -d -x 10 -y 4 "
+	printf '\033_Ga=T,q=2,f=32,s=2,v=2,c=2,r=2;/wAA/wD/AP8AAP///////w==\033\\'
+	sleep 10" || exit 1
+$TMUX2 set -g status off || exit 1
+$TMUX new-session -d -x 10 -y 4 || exit 1
+$TMUX set -g status off || exit 1
+$TMUX send-keys -l "$TMUX2 attach-session" || exit 1
+$TMUX send-keys Enter || exit 1
+sleep 1
+$TMUX capture-pane -pS0 -E1 >$TMP || exit 1
+[ "$(sed -n 1p $TMP)" = ".*" ] || exit 1
+[ "$(sed -n 2p $TMP)" = " @" ] || exit 1
+
+# A selection redraw uses the single-cell path. It must leave ASCII image
+# cells visible (graphical clients skip these cells to avoid erasing pixels).
+$TMUX2 copy-mode || exit 1
+$TMUX2 send-keys -X history-top || exit 1
+$TMUX2 send-keys -X start-of-line || exit 1
+$TMUX2 send-keys -X begin-selection || exit 1
+$TMUX2 send-keys -X cursor-right || exit 1
+sleep 1
+$TMUX capture-pane -pS0 -E1 >$TMP || exit 1
+sed -n 1p $TMP | grep -q '^\.\*' || exit 1
+sed -n 2p $TMP | grep -q '^ @' || exit 1
+
+exit 0