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#! /bin/sh
# This script tests: ppmchange
# Also requires: ppmrainbow pgmramp ppmhist
# Failure message
## If this test fails and ppmchange-roundtrip.test succeeds,
## the probable cause is a problem with one of the options of
## ppmchange: -closeness or -remainder.
tmpdir=${tmpdir:-/tmp}
rainbow_ppm=${tmpdir}/rainbow.ppm
changed_ppm=${tmpdir}/changed.ppm
# Explicit values for intermediate colors: rgb.txt may not be the one
# Netpbm provides; they may be defined in unusual ways.
brown=rgb:67/43/00
cyan=rgb:00/ff/ff
yellow=rgb:ff/ff/00
gray=rgb:7f/7f/7f
# Test 1. Should print 22488533 203
pgmramp -lr 8 8 | ppmchange black black white white $gray $gray \
-close=10 -remainder=blue | cksum
# Test 2. Should print 1008787190 613
ppmrainbow -tmpdir=$tmpdir -width=200 -height=1 red green blue | \
tee ${rainbow_ppm} | \
ppmchange red $brown green $brown blue $brown | cksum
# Validate ${rainbow_ppm}
# Should print 1983174784 613
cat ${rainbow_ppm} | cksum
# Test 3. Should print 2146447222 613
ppmchange red $brown green $cyan blue $yellow \
-closeness=25 ${rainbow_ppm} | cksum
# Test 4. Should print 1216791938 613
ppmchange red rgb:64/00/01 rgb:00/ff/00 rgb:00/32/02 blue blue \
-remainder=black -closeness=25 ${rainbow_ppm} | tee ${changed_ppm} | cksum
# Produce a histogram of the colors in the output image
# Should produce
# 0 0 0 0 78
# 0 0 255 29 40
# 0 50 2 30 41
# 100 0 1 30 41
ppmhist -sort=rgb -noheader ${changed_ppm}
rm ${rainbow_ppm} ${changed_ppm}
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