kc3-lang/libjpeg-turbo/croptest.in

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• Hash : a46c111d
  Author :
  Date : 2020-07-27T14:21:23
  

  Further jpeg_skip_scanlines() fixes
  
  - Introduce a partial image decompression regression test script that
    validates the correctness of jpeg_skip_scanlines() and
    jpeg_crop_scanlines() for a variety of cropping regions and libjpeg
    settings.
  
    This regression test catches the following issues:
    #182, fixed in 5bc43c7821df982f65aa1c738f67fbf7cba8bd69
    #237, fixed in 6e95c08649794f5018608f37250026a45ead2db8
    #244, fixed in 398c1e9acc9b4531edceb3d77da0de5744675052
    #441, fully fixed in this commit
  
    It does not catch the following issues:
    #194, fixed in 773040f9d949d5f313caf7507abaf4bd5d7ffa12
    #244 (additional segfault), fixed in
         9120a247436e84c0b4eea828cb11e8f665fcde30
  
  - Modify the libjpeg-turbo regression test suite (make test) so that it
    checks for the issue reported in #441 (segfault in
    jpeg_skip_scanlines() when used with 4:2:0 merged upsampling/color
    conversion.)
  
  - Fix issues in jpeg_skip_scanlines() that caused incorrect output with
    h2v2 (4:2:0) merged upsampling/color conversion.  The previous commit
    fixed the segfault reported in #441, but that was a symptom of a
    larger problem.  Because merged 4:2:0 upsampling uses a "spare row"
    buffer, it is necessary to allow the upsampler to run when skipping
    rows (fancy 4:2:0 upsampling, which uses context rows, also requires
    this.)  Otherwise, if skipping starts at an odd-numbered row, the
    output image will be incorrect.
  
  - Throw an error if jpeg_skip_scanlines() is called with two-pass color
    quantization enabled.  With two-pass color quantization, the first
    pass occurs within jpeg_start_decompress(), so subsequent calls to
    jpeg_skip_scanlines() interfere with the multipass state and prevent
    the second pass from occurring during subsequent calls to
    jpeg_read_scanlines().
  

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• croptest.in

• #!/bin/bash
  
  set -u
  set -e
  trap onexit INT
  trap onexit TERM
  trap onexit EXIT
  
  onexit()
  {
  	if [ -d $OUTDIR ]; then
  		rm -rf $OUTDIR
  	fi
  }
  
  runme()
  {
  	echo \*\*\* $*
  	$*
  }
  
  IMAGE=vgl_6548_0026a.bmp
  WIDTH=128
  HEIGHT=95
  IMGDIR=@CMAKE_CURRENT_SOURCE_DIR@/testimages
  OUTDIR=`mktemp -d /tmp/__croptest_output.XXXXXX`
  EXEDIR=@CMAKE_CURRENT_BINARY_DIR@
  
  if [ -d $OUTDIR ]; then
  	rm -rf $OUTDIR
  fi
  mkdir -p $OUTDIR
  
  exec >$EXEDIR/croptest.log
  
  echo "============================================================"
  echo "$IMAGE ($WIDTH x $HEIGHT)"
  echo "============================================================"
  echo
  
  for PROGARG in "" -progressive; do
  
  	cp $IMGDIR/$IMAGE $OUTDIR
  	basename=`basename $IMAGE .bmp`
  	echo "------------------------------------------------------------"
  	echo "Generating test images"
  	echo "------------------------------------------------------------"
  	echo
  	runme $EXEDIR/cjpeg $PROGARG -grayscale -outfile $OUTDIR/${basename}_GRAY.jpg $IMGDIR/${basename}.bmp
  	runme $EXEDIR/cjpeg $PROGARG -sample 2x2 -outfile $OUTDIR/${basename}_420.jpg $IMGDIR/${basename}.bmp
  	runme $EXEDIR/cjpeg $PROGARG -sample 2x1 -outfile $OUTDIR/${basename}_422.jpg $IMGDIR/${basename}.bmp
  	runme $EXEDIR/cjpeg $PROGARG -sample 1x2 -outfile $OUTDIR/${basename}_440.jpg $IMGDIR/${basename}.bmp
  	runme $EXEDIR/cjpeg $PROGARG -sample 1x1 -outfile $OUTDIR/${basename}_444.jpg $IMGDIR/${basename}.bmp
  	echo
  
  	for NSARG in "" -nosmooth; do
  
  		for COLORSARG in "" "-colors 256 -dither none -onepass"; do
  
  			for Y in {0..16}; do
  
  				for H in {1..16}; do
  
  					X=$(( (Y*16)%128 ))
  					W=$(( WIDTH-X-7 ))
  					if [ $Y -le 15 ]; then
  						CROPSPEC="${W}x${H}+${X}+${Y}"
  					else
  						Y2=$(( HEIGHT-H ));
  						CROPSPEC="${W}x${H}+${X}+${Y2}"
  					fi
  
  					echo "------------------------------------------------------------"
  					echo $PROGARG $NSARG $COLORSARG -crop $CROPSPEC
  					echo "------------------------------------------------------------"
  					echo
  					for samp in GRAY 420 422 440 444; do
  						$EXEDIR/djpeg $NSARG $COLORSARG -rgb -outfile $OUTDIR/${basename}_${samp}_full.ppm $OUTDIR/${basename}_${samp}.jpg
  						convert -crop $CROPSPEC $OUTDIR/${basename}_${samp}_full.ppm $OUTDIR/${basename}_${samp}_ref.ppm
  						runme $EXEDIR/djpeg $NSARG $COLORSARG -crop $CROPSPEC -rgb -outfile $OUTDIR/${basename}_${samp}.ppm $OUTDIR/${basename}_${samp}.jpg
  						runme cmp $OUTDIR/${basename}_${samp}.ppm $OUTDIR/${basename}_${samp}_ref.ppm
  					done
  					echo
  
  				done
  
  			done
  
  		done
  
  	done
  
  done
  
  echo SUCCESS!
  

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