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root |
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#! perl |
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our $EXPR = 'resize (blur (load "/root/pix/das_fette_schwein.jpg", 1 + (counter 1) % 10, 10), w, h)'; |
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#$EXPR = 'blur root, 10, 10' |
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#$EXPR = 'blur move (root, -x, -y), 5, 5' |
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#resize load "/root/pix/das_fette_schwein.jpg", w, h |
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use Safe; |
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{ |
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package urxvt::bgdsl::vars; |
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our ($self, $old, $new); |
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our ($x, $y, $w, $h); |
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package urxvt::bgdsl; # background language |
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*repeat_black = \&urxvt::RepeatNone; #TODO wtf |
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*repeat_wrap = \&urxvt::RepeatNormal; |
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*repeat_pad = \&urxvt::RepeatPad; |
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*repeat_mirror = \&urxvt::RepeatReflect; |
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sub load { |
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my ($path) = @_; |
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$new->{load}{$path} = $old->{load}{$path} || $self->new_img_from_file ($path); |
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} |
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sub root { |
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die "root op not supported, exg, we need you"; |
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} |
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sub resize { |
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$_[0]->scale ($_[1], $_[2]) |
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} |
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sub move { |
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# TODO: must be simpler |
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$_[0]->transform ($_[0]->w, $_[0]->h, $_[1], |
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1, 0, -$_[2], |
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0, 1, -$_[3], |
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0, 0, 1, |
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) |
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} |
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sub rotate { |
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$_[0]->rotate ($_[0], $_[1], $_[2], $_[3] * (3.14159265 / 180)) |
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} |
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sub blur { |
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my ($img, $rh, $rv) = @_; |
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$img = $img->clone; |
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$img->clone->blur ($rh, $rv); |
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$img |
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} |
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sub contrast { |
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my ($img, $r, $g, $b, $a) = @_; |
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($g, $b) = ($r, $r) if @_ < 4; |
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$a = 1 if @_ < 5; |
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$img = $img->clone; |
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$img->contrast ($r, $g, $b, $a); |
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$img |
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} |
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sub brightness { |
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my ($img, $r, $g, $b, $a) = @_; |
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($g, $b) = ($r, $r) if @_ < 4; |
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$a = 1 if @_ < 5; |
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$img = $img->clone; |
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$img->brightness ($r, $g, $b, $a); |
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$img |
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} |
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sub x { $new->{position_sensitive} = 1; $x } |
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sub y { $new->{position_sensitive} = 1; $y } |
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sub w { $new->{size_sensitive} = 1; $w } |
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sub h { $new->{size_sensitive} = 1; $h } |
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sub now { urxvt::NOW } |
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sub again { |
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$new->{again} = $_[0]; |
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} |
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sub counter { |
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$new->{again} = $_[0]; |
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$self->{counter}++ + 0 |
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} |
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} |
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sub parse_expr { |
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my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; |
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die if $@; |
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$expr |
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} |
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# compiles a parsed expression |
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sub set_expr { |
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my ($self, $expr) = @_; |
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local $Data::Dumper::Deparse=1; use Data::Dumper; warn Dumper $expr;#d# |
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$self->{expr} = $expr; |
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$self->recalculate; |
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} |
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# evaluate the current bg expression |
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sub recalculate { |
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my ($self) = @_; |
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local $urxvt::bgdsl::vars::self = $self; |
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local $urxvt::bgdsl::vars::old = $self->{state}; |
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local $urxvt::bgdsl::vars::new = my $state = $self->{state} = {}; |
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($urxvt::bgdsl::vars::x, $urxvt::bgdsl::vars::y, $urxvt::bgdsl::vars::w, $urxvt::bgdsl::vars::h) = |
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$self->get_geometry; |
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my $img = eval { $self->{expr}->() }; |
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warn $@ if $@;#d# |
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if (my $again = $state->{again}) { |
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warn $again;#d# |
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$state->{again} = urxvt::timer->new->after ($again)->cb (sub { $self->recalculate }); |
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} |
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# TODO: install handlers for geometry changes &c |
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warn $img; |
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$self->set_background ($img); |
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$self->scr_recolour (0); |
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$self->want_refresh; |
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} |
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sub on_start { |
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my ($self) = @_; |
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$self->set_expr (parse_expr $EXPR); |
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() |
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} |
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