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Attempt at avoiding the false changes seen on Xue. Seems that alpha-blending

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produces minute differences where there should be none.

- scripts/ppmdiff/ppmdiff.c (diff): instead of looking for all or noting
  changes, also detect gradual changes
- scripts/ppmdiff/ppmdiff.c (diff, main): don't mark areas with differences
  in the main images if using shadow images
- scripts/schps2ppm: new option to disable alpha blending
- scripts/schhist2web: cache pixmaps with default line thickness and no
  alpha blending in hard_*
- scripts/schhist2web: base marking of areas with differences exclusively
  on the hard_* pixmaps
This commit is contained in:
Werner Almesberger
2010-08-30 15:11:43 -03:00
parent 66cf6a296e
commit 78f6cfbfda
3 changed files with 43 additions and 22 deletions
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30
scripts/schhist2web
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@@ -193,10 +193,11 @@ for n in $first `cd "$dir" && git rev-list --reverse $first..HEAD`; do
schname="$new"
fi
tmp=`pwd`/_schhist2web
trap "rm -rf \"$cache/ppm_$n\" \"$cache/fat_$n\" \"$tmp\"" 0
trap "rm -rf \"$cache/ppm_$n\" \"$cache/fat_$n\" \"$cache/ps_$n\" \
\"$cache/hard_$n\" \"$tmp\"" 0
if [ ! -d "$cache/ppm_$n" ]; then
rm -rf "$cache/ppm_$n" "$cache/fat_$n" "$cache/ps_$n"
mkdir "$cache/ppm_$n" "$cache/fat_$n" "$cache/ps_$n"
rm -rf "$cache/ppm_$n" "$cache/fat_$n" "$cache/ps_$n" "$cache/hard_$n"
mkdir "$cache/ppm_$n" "$cache/fat_$n" "$cache/ps_$n" "$cache/hard_$n"
#
# potential optimization here: remember Postscript files from previous
# run (or their md5sum) and check if they have changed. If not, skip
@@ -205,12 +206,21 @@ for n in $first `cd "$dir" && git rev-list --reverse $first..HEAD`; do
#
gitsch2ps $sanitize "$dir" "$schname" $n "$tmp" || exit
for m in "$tmp"/*.ps; do
ppm="$cache/ppm_$n/`basename "$m" .ps`.ppm"
normalizeschps -w 120 "$m" | schps2ppm - "$ppm" || exit
ppm="$cache/fat_$n/`basename "$m" .ps`.ppm"
normalizeschps -w 500 "$m" | schps2ppm - "$ppm" || exit
# Postscript, for making PDFs later
ps="$cache/ps_$n/`basename "$m"`"
normalizeschps "$m" "$ps" || exit
# Unadorned pixmap, for comparison
ppm="$cache/hard_$n/`basename "$m" .ps`.ppm"
schps2ppm -n "$ps" "$ppm" || exit
# Pixmap with thin lines, for the detail views
ppm="$cache/ppm_$n/`basename "$m" .ps`.ppm"
normalizeschps -w 120 "$m" | schps2ppm - "$ppm" || exit
# Pixmap with thick lines, for the thumbnails
ppm="$cache/fat_$n/`basename "$m" .ps`.ppm"
normalizeschps -w 500 "$m" | schps2ppm - "$ppm" || exit
done
rm -rf "$tmp"
fi
@@ -295,19 +305,21 @@ for n in `cd "$dir" && git rev-list $first..HEAD~1` $first; do
while read m; do
a="$cache/ppm_$n/$m.ppm"
fat_a="$cache/fat_$n/$m.ppm"
hard_a="$cache/hard_$n/$m.ppm"
b="$cache/ppm_$next/$m.ppm"
fat_b="$cache/fat_$next/$m.ppm"
hard_b="$cache/hard_$next/$m.ppm"
diff="$out/diff_$next/$m.png"
thumb="$out/thumb_$next/$m.png"
if [ -f "$a" -a -f "$b" ]; then
s="$s<TD align=\"center\" valign=\"middle\">"
if ! pngdiff cat "$diff" "$a" "$b"; then
if ! pngdiff cat "$diff" "$a" "$b" "$hard_a" "$hard_b"; then
s="$s<IMG src=\"unchanged.png\""
continue
fi
pngdiff shrink "$thumb" -f $THUMB_OPTS "$fat_a" "$fat_b" \
"$a" "$b" || exit
"$hard_a" "$hard_b" || exit
mkdir -p "$out/pdf_$next"
schps2pdf -T BEFORE -T AFTER -o "$out/pdf_$next/$m.pdf" \
"$cache/ps_$n/$m.ps" "$cache/ps_$next/$m.ps" || exit