| 1 |
#! perl |
| 2 |
|
| 3 |
our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", left, top'; |
| 4 |
#$EXPR = 'blur root, 10, 10' |
| 5 |
#$EXPR = 'blur move (root, -x, -y), 5, 5' |
| 6 |
#resize load "/root/pix/das_fette_schwein.jpg", w, h |
| 7 |
|
| 8 |
use Safe; |
| 9 |
|
| 10 |
our ($bgdsl_self, $old, $new); |
| 11 |
our ($l, $t, $w, $h); |
| 12 |
|
| 13 |
{ |
| 14 |
package urxvt::bgdsl; # background language |
| 15 |
|
| 16 |
*repeat_black = \&urxvt::RepeatNone; #TODO wtf |
| 17 |
*repeat_wrap = \&urxvt::RepeatNormal; |
| 18 |
*repeat_pad = \&urxvt::RepeatPad; |
| 19 |
*repeat_mirror = \&urxvt::RepeatReflect; |
| 20 |
|
| 21 |
sub load($) { |
| 22 |
my ($path) = @_; |
| 23 |
|
| 24 |
$new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path); |
| 25 |
} |
| 26 |
|
| 27 |
sub root() { |
| 28 |
die "root op not supported, exg, we need you"; |
| 29 |
} |
| 30 |
|
| 31 |
sub resize($$$) { |
| 32 |
$_[0]->scale ($_[1], $_[2]) |
| 33 |
} |
| 34 |
|
| 35 |
sub move($$$) { |
| 36 |
# TODO: must be simpler |
| 37 |
$_[0]->transform ($_[0]->w, $_[0]->h, $_[1], |
| 38 |
1, 0, -$_[2], |
| 39 |
0, 1, -$_[3], |
| 40 |
0, 0, 1, |
| 41 |
) |
| 42 |
} |
| 43 |
|
| 44 |
sub rotate($$$$) { |
| 45 |
$_[0]->rotate ($_[0], $_[1], $_[2], $_[3] * (3.14159265 / 180)) |
| 46 |
} |
| 47 |
|
| 48 |
sub blur($$$) { |
| 49 |
my ($img, $rh, $rv) = @_; |
| 50 |
|
| 51 |
$img = $img->clone; |
| 52 |
$img->clone->blur ($rh, $rv); |
| 53 |
$img |
| 54 |
} |
| 55 |
|
| 56 |
sub contrast($$;$$;$) { |
| 57 |
my ($img, $r, $g, $b, $a) = @_; |
| 58 |
($g, $b) = ($r, $r) if @_ < 4; |
| 59 |
$a = 1 if @_ < 5; |
| 60 |
$img = $img->clone; |
| 61 |
$img->contrast ($r, $g, $b, $a); |
| 62 |
$img |
| 63 |
} |
| 64 |
|
| 65 |
sub brightness($$;$$;$) { |
| 66 |
my ($img, $r, $g, $b, $a) = @_; |
| 67 |
($g, $b) = ($r, $r) if @_ < 4; |
| 68 |
$a = 1 if @_ < 5; |
| 69 |
$img = $img->clone; |
| 70 |
$img->brightness ($r, $g, $b, $a); |
| 71 |
$img |
| 72 |
} |
| 73 |
|
| 74 |
sub left () { $new->{position_sensitive} = 1; $l } |
| 75 |
sub top () { $new->{position_sensitive} = 1; $t } |
| 76 |
sub width () { $new->{size_sensitive} = 1; $w } |
| 77 |
sub height() { $new->{size_sensitive} = 1; $h } |
| 78 |
|
| 79 |
sub now() { urxvt::NOW } |
| 80 |
|
| 81 |
sub again($) { |
| 82 |
$new->{again} = $_[0]; |
| 83 |
} |
| 84 |
|
| 85 |
sub counter($) { |
| 86 |
$new->{again} = $_[0]; |
| 87 |
$bgdsl_self->{counter}++ + 0 |
| 88 |
} |
| 89 |
} |
| 90 |
|
| 91 |
sub parse_expr { |
| 92 |
my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; |
| 93 |
die if $@; |
| 94 |
$expr |
| 95 |
} |
| 96 |
|
| 97 |
# compiles a parsed expression |
| 98 |
sub set_expr { |
| 99 |
my ($self, $expr) = @_; |
| 100 |
|
| 101 |
local $Data::Dumper::Deparse=1; use Data::Dumper; warn Dumper $expr;#d# |
| 102 |
$self->{expr} = $expr; |
| 103 |
$self->recalculate; |
| 104 |
} |
| 105 |
|
| 106 |
# evaluate the current bg expression |
| 107 |
sub recalculate { |
| 108 |
my ($self) = @_; |
| 109 |
|
| 110 |
local $bgdsl_self = $self; |
| 111 |
|
| 112 |
local $old = $self->{state}; |
| 113 |
local $new = my $state = $self->{state} = {}; |
| 114 |
|
| 115 |
($l, $t, $w, $h) = |
| 116 |
$self->get_geometry; |
| 117 |
|
| 118 |
warn "$l, $t";#d# |
| 119 |
|
| 120 |
my $img = eval { $self->{expr}->() }; |
| 121 |
warn $@ if $@;#d# |
| 122 |
|
| 123 |
my $repeat; |
| 124 |
|
| 125 |
if (my $again = $state->{again}) { |
| 126 |
$repeat = 1; |
| 127 |
$state->{again} = urxvt::timer->new->after ($again)->cb (sub { $self->recalculate }); |
| 128 |
} |
| 129 |
|
| 130 |
if (delete $state->{position_sensitive}) { |
| 131 |
$repeat = 1; |
| 132 |
$self->enable (position_change => sub { $_[0]->recalculate }); |
| 133 |
} else { |
| 134 |
$self->disable ("position_change"); |
| 135 |
} |
| 136 |
|
| 137 |
if (delete $state->{size_sensitive}) { |
| 138 |
$repeat = 1; |
| 139 |
$self->enable (size_change => sub { $_[0]->recalculate }); |
| 140 |
} else { |
| 141 |
$self->disable ("size_change"); |
| 142 |
} |
| 143 |
|
| 144 |
# TODO: install handlers for geometry changes &c |
| 145 |
|
| 146 |
warn $img; |
| 147 |
$self->set_background ($img); |
| 148 |
$self->scr_recolour (0); |
| 149 |
$self->want_refresh; |
| 150 |
} |
| 151 |
|
| 152 |
sub on_start { |
| 153 |
my ($self) = @_; |
| 154 |
|
| 155 |
$self->set_expr (parse_expr $EXPR); |
| 156 |
|
| 157 |
() |
| 158 |
} |
| 159 |
|
