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#! /bin/bash
# This script tests: giftopnm pamtogif
# Also requires: ppmtopgm ppmtorgb3 rgb3toppm pbmmake
alias giftopnm="${PBM_TESTPREFIX}giftopnm"
alias pamtogif="${PBM_TESTPREFIX}pamtogif"
alias pbmmake="${PBM_BINPREFIX}pbmmake"
alias ppmtopgm="${PBM_BINPREFIX}ppmtopgm"
alias ppmtorgb3="${PBM_BINPREFIX}ppmtorgb3"
alias rgb3toppm="${PBM_BINPREFIX}rgb3toppm"
alias pnminvert="${PBM_BINPREFIX}pnminvert"
shopt -s expand_aliases
# Test 1. Should produce 2871603838 33838
# which is the result of ppmtopgm testimg.ppm | cksum
# four times
ppmtopgm testimg.ppm | tee ${tmpdir}/testimg.pgm | pamtogif | giftopnm | cksum
pamtogif -interlace ${tmpdir}/testimg.pgm | giftopnm | cksum
pamtogif -sort ${tmpdir}/testimg.pgm | tee ${tmpdir}/testimg.gif | \
giftopnm | cksum
echo "junk" >> ${tmpdir}/testimg.gif && \
giftopnm -image=1 -quitearly ${tmpdir}/testimg.gif | cksum
rm ${tmpdir}/testimg.pgm
rm ${tmpdir}/testimg.gif
# Test 2. Break up input image into three monochrome planes,
# maxval 255. Transform each plane to gif and back to pgm.
# Reassemble the planes. Result should be identical to input.
# Should print 1926073387 101484
cp testimg.ppm ${tmpdir} &&
ppmtorgb3 ${tmpdir}/testimg.ppm &&
pamtogif ${tmpdir}/testimg.red | \
giftopnm > ${tmpdir}/out.red &&
pamtogif ${tmpdir}/testimg.grn |
giftopnm > ${tmpdir}/out.grn &&
pamtogif ${tmpdir}/testimg.blu | \
giftopnm | \
rgb3toppm ${tmpdir}/testimg.red ${tmpdir}/testimg.grn - | \
cksum
rm ${tmpdir}/testimg.{ppm,red,grn,blu} ${tmpdir}/out.{red,grn}
# Test 3. Should produce 2425386270 41 five times.
pamtogif testgrid.pbm | giftopnm | cksum
pamtogif -nolzw testgrid.pbm | giftopnm | cksum
pamtogif -transparent=black testgrid.pbm | giftopnm | cksum
pamtogif -alpha=testgrid.pbm testgrid.pbm | giftopnm | cksum
pamtogif -transparent=white testgrid.pbm | giftopnm -alpha=- | \
pnminvert | cksum
# Test 4.
# In this gif file the code length changes after the last image data.
# Image data: 3 bits, end code 4 bits.
# Should produce P1 4 1 0 1 0 1
pbmmake -g 4 1 | \
pamtogif | giftopnm -plain | \
tr '\n' ' '
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