test/png-roundtrip.test


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#! /bin/bash
# This script tests: pngtopnm pnmtopng
# Also requires: 

  alias pngtopnm="${PBM_TESTPREFIX}pngtopnm"
  alias pnmtopng="${PBM_TESTPREFIX}pnmtopng"
  shopt -s expand_aliases

## Fails because .ok not set yet.

# Test 1.  Should print 1926073387 101484 18 times
for flags in "" -interlace \
  -gamma=.45 \
  -hist \
  -nofilter \
  -sub \
  -up \
  -avg \
  -paeth \
  -compression=9 \
  "-compression=0 -comp_mem=1 -comp_window=8 -comp_buffer=512" \
  "-compression=9 -comp_mem=1 -comp_window=15 -comp_buffer=512" \
  "-compression=9 -comp_mem=1 -comp_window=8 -comp_buffer=512" \
  "-compression=0 -comp_mem=9 -comp_window=8 -comp_buffer=512" \
  "-compression=9 -comp_mem=9 -comp_window=15 -comp_buffer=8096" \
  -comp_strategy=huffman_only \
  -comp_strategy=filtered \
  -force
  do
pnmtopng testimg.ppm $flags | pngtopnm | cksum
done

# Test 2.  Should print 2425386270 41 18 times
for flags in "" -interlace \
  -gamma=.45 \
  -hist \
  -nofilter \
  -sub \
  -up \
  -avg \
  -paeth \
  -compression=9 \
  "-compression=0 -comp_mem=1 -comp_window=8 -comp_buffer=512" \
  "-compression=9 -comp_mem=1 -comp_window=15 -comp_buffer=512" \
  "-compression=9 -comp_mem=1 -comp_window=8 -comp_buffer=512" \
  "-compression=0 -comp_mem=9 -comp_window=8 -comp_buffer=512" \
  "-compression=9 -comp_mem=9 -comp_window=15 -comp_buffer=8096" \
  -comp_strategy=huffman_only \
  -comp_strategy=filtered \
  -force
  do
  pnmtopng testgrid.pbm $flags | pngtopnm | cksum
  done