Add a basic regression test tool.

diff --git a/tests/regress.sh b/tests/regress.sh
new file mode 100755 (executable)
index 0000000..9c56d77
--- /dev/null
+++ b/tests/regress.sh
@@ -0,0 +1,70 @@
+#!/bin/sh
+# Simple test which decodes some images from LBX archives and compares against
+# known md5sums to find regressions.  Unforuntately depends on the output
+# format of lbximg; this may change in the future.
+
+# Image/tool paths.  Adjust to taste.  The DATADIR must contain the original
+# Moo2 LBX archives, with filenames in lower case.
+DATADIR=$HOME/.2oom/game
+LBXTOOL="`readlink -f ../src/lbxtool`"
+LBXIMG="`readlink -f ../src/lbximg`"
+
+# Status vars
+FAILED=""
+
+if ! SCRATCH="`mktemp -d`"; then
+       exit 1
+fi
+
+cd "$SCRATCH"
+echo "Working in $SCRATCH"
+
+# Palettes
+$LBXTOOL -xf $DATADIR/fonts.lbx
+
+compare()
+{
+       echo -n "  Frame $1 "
+       FILE="$(printf 'out.%03d.png' $1)"
+       MD5="$(md5sum "$FILE" | cut -d ' ' -f 1)"
+       if [ "$MD5" = "$2" ]; then
+               echo "OK"
+               rm -f "$FILE"
+       else
+               echo "FAILED"
+               FAILED="yes"
+       fi
+}
+
+# Main menu
+$LBXTOOL -xf $DATADIR/mainmenu.lbx mainmenu.lbx.{000,007,021}
+
+echo "mainmenu.lbx.021: single frame, embedded palette:"
+$LBXIMG -df mainmenu.lbx.021
+compare 0 390c49cfd1fe5e2ac0490be976f20936
+
+echo "mainmenu.lbx.007: single frame, external palette:"
+$LBXIMG -dp fonts.lbx.006 < mainmenu.lbx.007
+compare 0 76def3e188f666025c62e621e23ab0d0
+
+echo "mainmenu.lbx.000: multi frame, external palette:"
+$LBXIMG -dp fonts.lbx.006 < mainmenu.lbx.000 0 15 49
+compare  0 cc4ae6d96f6233f3b50bdce8b7ca74ee
+compare 15 cad158da9a015adfcea7809a8a3b6f4b
+compare 49 390c49cfd1fe5e2ac0490be976f20936
+
+# Logos
+$LBXTOOL -xf $DATADIR/logo.lbx 
+
+echo "logo.lbx.000: single frame, embedded palette:"
+$LBXIMG -df logo.lbx.000
+compare 0 75f9e5a7205192b414f009424ffb7dc3
+
+echo "logo.lbx.001: multi frame, embedded palette:"
+$LBXIMG -df logo.lbx.001 0 30 63
+compare  0 f3f0859b39f2e76091842c8a7276b2a1
+compare 30 8fb41356a20c68c3be0939ad49256cf9
+compare 63 156f381c5d4bf6178affd3d6a4720118
+
+# Clean up
+[ -z "$FAILED" ] && rm -rf -- "$SCRATCH"