test/png-roundtrip2.test


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#! /bin/bash
# This script tests: pngtopam pamtopng
# Also requires:

# Failure message
## If this test fails and pnm-roundtrip.test succeeds, it indicates
## some problem with pamtopng.
##
## If both tests fail, the likely cause is a problem with pngtopam.
## It is also possible that there is some problem in libpng.

# Test 1.  Should print 1926073387 101484 twice
for flags in "" -gamma=.45
  do
  pamtopng testimg.ppm $flags | pngtopam | cksum
  done

# Test 2.  Should print 2425386270 41 twice
for flags in "" -gamma=.45
  do
  pamtopng testgrid.pbm $flags | pngtopam | cksum
  done