#! /bin/sh
# This script tests: pgmtoppm ppmtopgm ppmtoppm pgmtopbm
# Also requires: pbmmake ppmcolormask pnminvert

echo "Test 1.  Should print 281226646 481 five times."

cat maze.pbm | cksum
pgmtoppm black-white maze.pbm | ppmtopgm | \
  pgmtopbm -th -val=0.5 | cksum
pgmtoppm white-black maze.pbm | ppmtopgm | \
  pgmtopbm -th -val=0.5 | pnminvert | cksum
pgmtoppm white-black maze.pbm | ppmcolormask white | cksum
ppmtoppm < maze.pbm | ppmtopgm | pgmtopbm -th -val=0.5 | cksum

echo "Test 2.  Should print three all-white, then three all-black PBM images"

pbmmake -w 7 3  -plain
echo

pbmmake -w 7 3 | pgmtoppm black-white | ppmtopgm | \
  pgmtopbm -th -val=0.5 -plain
echo
pbmmake -w 7 3 | ppmtoppm | ppmtopgm | \
  pgmtopbm -th -val=0.5 -plain
echo

pbmmake -b 17 2 -plain
echo

pbmmake -b 17 2 | pgmtoppm black-white | ppmtopgm | \
  pgmtopbm -th -val=0.5 -plain
echo
pbmmake -b 17 2 | ppmtoppm | ppmtopgm | \
  pgmtopbm -th -val=0.5 -plain