128 lines
2.8 KiB
Perl
128 lines
2.8 KiB
Perl
#!perl --
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use strict;
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use warnings;
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use feature qw( say );
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use File::Find;
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use File::Path qw(make_path remove_tree);
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use GD;
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my $dry_run = grep{ $_ eq '--dry-run'} @ARGV;
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my $resdir = 'app/src/main/res';
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my $dstdir = 'tmp';
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my $tmpfile = 'tmp/tmp.png';
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sub fix($){
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my($relpath) = @_;
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my $dstfile = "$dstdir/$relpath";
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return if not $dstfile =~ s/(png|webp)\z/png/i;
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my $ext = lc $1;
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my $inData;
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if( $ext eq "webp" ){
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open(my $fh,"dwebp $relpath -quiet -o -|") or die "dwebp : $!";
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binmode($fh);
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local $/ = undef;
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$inData = <$fh>;
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close($fh) or die "dwebp: $!";
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}else{
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open(my $fh,"<",$relpath) or die "$relpath : $!";
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binmode($fh);
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local $/ = undef;
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$inData = <$fh>;
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close($fh) or die "$relpath : $!";
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}
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my $image = GD::Image->newFromPngData($inData,1);
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my $width = $image->width;
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my $height = $image->height;
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my $alphaMax = 0;
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my $isColor = 0 ;
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Loop: for( my $y = 0; $y < $height ;++$y){
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for( my $x = 0; $x < $width ;++$x){
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my $c = $image->getPixel($x,$y);
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my $c0 = ($c >> 24)&255; # GDのalphaは0が不透明、127が完全透明
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my $r = ($c >> 16)&255;
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my $g = ($c >> 8)&255;
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my $b = ($c >> 0)&255;
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if( abs($r-$g) >= 2 or abs($r-$b) >= 2 or abs($g-$b) >= 2 ){
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$isColor = 1;
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last Loop;
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}
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my $alpha= 127-$c0;
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if( $alpha > $alphaMax){
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$alphaMax = $alpha;
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}
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}
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}
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return if $isColor;
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return if $alphaMax == 0;
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return if $alphaMax >= 126;
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say "$width x $height ,alphaMax=$alphaMax $relpath";
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my $scale = 127.0/$alphaMax;
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for( my $y = 0; $y < $height ;++$y){
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for( my $x = 0; $x < $width ;++$x){
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my $c = $image->getPixel($x,$y);
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my $c0 = ($c >> 24)&255; # GDのalphaは0が不透明、127が完全透明
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my $r = ($c >> 16)&255;
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my $g = ($c >> 8)&255;
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my $b = ($c >> 0)&255;
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next if $c0 == 127;
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my $alpha= 127-$c0;
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$c0 = 127 - int( 0.5 + $alpha * $scale );
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my($rgb) = ($r+$g+$b >= 555 ? 0xffffff : 0x000000 );
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$c = $rgb | ($c0 << 24 );
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$image->setPixel($x,$y,$c);
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}
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}
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my $dstdir = $dstfile;
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$dstdir =~ s|/[^/]+\z||;
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make_path($dstdir);
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$image->saveAlpha(1);
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open(my $fh,">",$dstfile) or die "$dstfile $!";
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binmode $fh;
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print $fh $image->png;
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close($fh) or die "$dstfile $!";
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return if $dry_run;
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if(1){
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my $relpath_webp = $relpath;
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$relpath_webp =~ s/(png|webp)\z/webp/i;
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if( "png" eq lc $1 ){
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unlink $relpath;
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}
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system qq(cwebp $dstfile -quiet -o $relpath_webp);
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}
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}
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my @files;
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find(
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{
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no_chdir => 1
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,wanted =>sub{
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my $relpath = $File::Find::name;
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return if -d $relpath;
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return if not $relpath =~ m|/drawable-|;
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return if $relpath =~ m%/(media_type_|emoji_|media_bg_dark)%;
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push @files,$relpath;
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}
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}
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,$resdir
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);
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for my $relpath(@files){
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fix($relpath);
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}
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