[ViewVC] Annotation of: cvs/rxvt-unicode/src/perl/background

#! perl

our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
$EXPR = '
   rotate W, H, 50, 50, counter 1/60, repeat_mirror,
   clip X, Y, W, H, repeat_mirror,
   load "/root/pix/das_fette_schwein.jpg"
';
#$EXPR = 'blur root, 10, 10'
#$EXPR = 'blur move (root, -x, -y), 5, 5'
#resize load "/root/pix/das_fette_schwein.jpg", w, h

use Safe;

our ($bgdsl_self, $old, $new);
our ($l, $t, $w, $h);

{
   package urxvt::bgdsl; # background language

   *repeat_black  = \&urxvt::RepeatNone; #TODO wtf
   *repeat_wrap   = \&urxvt::RepeatNormal;
   *repeat_pad    = \&urxvt::RepeatPad;
   *repeat_mirror = \&urxvt::RepeatReflect;

   sub load($) {
      my ($path) = @_;

      $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path);
   }

   sub root() {
      die "root op not supported, exg, we need you";
   }

#   sub clone($) {
#      $_[0]->clone
#   }

   sub clip($$$$$;$) {
      my $img = pop;
      $img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
   }

   sub resize($$$) {
      my $img = pop;
      $img->scale ($_[0], $_[1])
   }

   # TODO: ugly
   sub move($$;$) {
      my $img = pop;
      $img->sub_rect (
         $_[0], $_[1],
         $img->w, $img->h,
         $_[2],
      )
   }

   sub rotate($$$$$$;$) {
      my $img = pop;
      $img->rotate (
         $_[0],
         $_[1],
         $_[2] * $img->w * .01,
         $_[3] * $img->h * .01,
         $_[4] * (3.14159265 / 180),
         $_[5],
      )
   }

   sub blur($$$) {
      my ($rh, $rv, $img) = @_;

      $img = $img->clone;
      $img->blur ($rh, $rv);
      $img
   }

   sub contrast($$;$$;$) {
      my $img = pop;
      my ($r, $g, $b, $a) = @_;

      ($g, $b) = ($r, $r) if @_ < 4;
      $a       = 1        if @_ < 5;

      $img = $img->clone;
      $img->contrast ($r, $g, $b, $a);
      $img
   }

   sub brightness($$;$$;$) {
      my $img = pop;
      my ($r, $g, $b, $a) = @_;

      ($g, $b) = ($r, $r) if @_ < 4;
      $a       = 1        if @_ < 5;

      $img = $img->clone;
      $img->brightness ($r, $g, $b, $a);
      $img
   }

   sub X() { $new->{position_sensitive} = 1; $l }
   sub Y() { $new->{position_sensitive} = 1; $t }
   sub W() { $new->{size_sensitive}     = 1; $w }
   sub H() { $new->{size_sensitive}     = 1; $h }

   sub now() { urxvt::NOW }

   sub again($) {
      $new->{again} = $_[0];
   }

   sub counter($) {
      $new->{again} = $_[0];
      $bgdsl_self->{counter} + 0
   }
}

sub parse_expr {
   my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
   die if $@;
   $expr
}

# compiles a parsed expression
sub set_expr {
   my ($self, $expr) = @_;

   $self->{expr} = $expr;
   $self->recalculate;
}

# evaluate the current bg expression
sub recalculate {
   my ($self) = @_;

   #TODO: rate limit calls

   local $bgdsl_self = $self;

   local $old = $self->{state};
   local $new = my $state = $self->{state} = {};

   ($l, $t, $w, $h) =
      $self->get_geometry;

   my $img = eval { $self->{expr}->() };
   warn $@ if $@;#d#

   my $repeat;

   if (my $again = $state->{again}) {
      $repeat = 1;
      $state->{timer} = $again == $old->{again}
                        ? $old->{timer}
                        : urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
                             ++$self->{counter};
                             $self->recalculate
                          });
   }

   if (delete $state->{position_sensitive}) {
      $repeat = 1;
      $self->enable (position_change => sub { $_[0]->recalculate });
   } else {
      $self->disable ("position_change");
   }

   if (delete $state->{size_sensitive}) {
      $repeat = 1;
      $self->enable (size_change => sub { $_[0]->recalculate });
   } else {
      $self->disable ("size_change");
   }

   %$old = ();

   unless ($repeat) {
      delete $self->{state};
      delete $self->{expr};
   }

   $img = $img->sub_rect (0, 0, $w, $h)
      if $img->w != $w || $img->h != $h;

   $self->set_background ($img);
   $self->scr_recolour (0);
   $self->want_refresh;
}

sub on_start {
   my ($self) = @_;

   $self->set_expr (parse_expr $EXPR);

   ()
}

Revision:	1.7
Committed:	Tue Jun 5 14:04:58 2012 UTC (11 years, 11 months ago) by root
Branch:	MAIN
Changes since 1.6:	+34 -22 lines
Log Message:	hmmhmm
#	User	Rev	Content
1	root	1.1	#! perl
2
3	root	1.4	our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
4	root	1.7	$EXPR = '
5			rotate W, H, 50, 50, counter 1/60, repeat_mirror,
6			clip X, Y, W, H, repeat_mirror,
7			load "/root/pix/das_fette_schwein.jpg"
8			';
9	root	1.1	#$EXPR = 'blur root, 10, 10'
10			#$EXPR = 'blur move (root, -x, -y), 5, 5'
11			#resize load "/root/pix/das_fette_schwein.jpg", w, h
12
13			use Safe;
14
15	root	1.3	our ($bgdsl_self, $old, $new);
16			our ($l, $t, $w, $h);
17
18	root	1.1	{
19			package urxvt::bgdsl; # background language
20
21			*repeat_black = \&urxvt::RepeatNone; #TODO wtf
22			*repeat_wrap = \&urxvt::RepeatNormal;
23			*repeat_pad = \&urxvt::RepeatPad;
24			*repeat_mirror = \&urxvt::RepeatReflect;
25
26	root	1.2	sub load($) {
27	root	1.1	my ($path) = @_;
28
29	root	1.3	$new->{load}{$path} = $old->{load}{$path} \|\| $bgdsl_self->new_img_from_file ($path);
30	root	1.1	}
31
32	root	1.2	sub root() {
33	root	1.1	die "root op not supported, exg, we need you";
34			}
35
36	root	1.4	# sub clone($) {
37			# $_[0]->clone
38			# }
39
40	root	1.7	sub clip($$$$$;$) {
41			my $img = pop;
42			$img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
43	root	1.4	}
44
45	root	1.2	sub resize($$$) {
46	root	1.7	my $img = pop;
47			$img->scale ($_[0], $_[1])
48	root	1.1	}
49
50	root	1.7	# TODO: ugly
51			sub move($$;$) {
52			my $img = pop;
53			$img->sub_rect (
54			$_[0], $_[1],
55			$img->w, $img->h,
56			$_[2],
57	root	1.1	)
58			}
59
60	root	1.4	sub rotate($$$$$$;$) {
61	root	1.7	my $img = pop;
62			$img->rotate (
63			$_[0],
64	root	1.4	$_[1],
65	root	1.7	$_[2] * $img->w * .01,
66			$_[3] * $img->h * .01,
67			$_[4] * (3.14159265 / 180),
68			$_[5],
69	root	1.4	)
70	root	1.1	}
71
72	root	1.2	sub blur($$$) {
73	root	1.7	my ($rh, $rv, $img) = @_;
74	root	1.1
75			$img = $img->clone;
76	root	1.4	$img->blur ($rh, $rv);
77	root	1.1	$img
78			}
79
80	root	1.2	sub contrast($$;$$;$) {
81	root	1.7	my $img = pop;
82			my ($r, $g, $b, $a) = @_;
83	root	1.4
84	root	1.1	($g, $b) = ($r, $r) if @_ < 4;
85			$a = 1 if @_ < 5;
86	root	1.4
87	root	1.1	$img = $img->clone;
88			$img->contrast ($r, $g, $b, $a);
89			$img
90			}
91
92	root	1.2	sub brightness($$;$$;$) {
93	root	1.7	my $img = pop;
94			my ($r, $g, $b, $a) = @_;
95	root	1.4
96	root	1.1	($g, $b) = ($r, $r) if @_ < 4;
97			$a = 1 if @_ < 5;
98	root	1.4
99	root	1.1	$img = $img->clone;
100			$img->brightness ($r, $g, $b, $a);
101			$img
102			}
103
104	root	1.4	sub X() { $new->{position_sensitive} = 1; $l }
105			sub Y() { $new->{position_sensitive} = 1; $t }
106			sub W() { $new->{size_sensitive} = 1; $w }
107			sub H() { $new->{size_sensitive} = 1; $h }
108	root	1.3
109	root	1.2	sub now() { urxvt::NOW }
110	root	1.1
111	root	1.2	sub again($) {
112	root	1.1	$new->{again} = $_[0];
113			}
114
115	root	1.2	sub counter($) {
116	root	1.1	$new->{again} = $_[0];
117	root	1.7	$bgdsl_self->{counter} + 0
118	root	1.1	}
119			}
120
121			sub parse_expr {
122			my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
123			die if $@;
124			$expr
125			}
126
127			# compiles a parsed expression
128			sub set_expr {
129			my ($self, $expr) = @_;
130
131			$self->{expr} = $expr;
132			$self->recalculate;
133			}
134
135			# evaluate the current bg expression
136			sub recalculate {
137			my ($self) = @_;
138
139	root	1.6	#TODO: rate limit calls
140
141	root	1.3	local $bgdsl_self = $self;
142	root	1.1
143	root	1.3	local $old = $self->{state};
144			local $new = my $state = $self->{state} = {};
145	root	1.1
146	root	1.3	($l, $t, $w, $h) =
147	root	1.1	$self->get_geometry;
148
149			my $img = eval { $self->{expr}->() };
150			warn $@ if $@;#d#
151
152	root	1.2	my $repeat;
153
154	root	1.1	if (my $again = $state->{again}) {
155	root	1.2	$repeat = 1;
156	root	1.6	$state->{timer} = $again == $old->{again}
157			? $old->{timer}
158	root	1.7	: urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
159			++$self->{counter};
160			$self->recalculate
161			});
162	root	1.1	}
163
164	root	1.2	if (delete $state->{position_sensitive}) {
165			$repeat = 1;
166			$self->enable (position_change => sub { $_[0]->recalculate });
167			} else {
168			$self->disable ("position_change");
169			}
170
171			if (delete $state->{size_sensitive}) {
172			$repeat = 1;
173			$self->enable (size_change => sub { $_[0]->recalculate });
174			} else {
175			$self->disable ("size_change");
176			}
177
178	root	1.6	%$old = ();
179
180	root	1.5	unless ($repeat) {
181			delete $self->{state};
182			delete $self->{expr};
183			}
184
185	root	1.4	$img = $img->sub_rect (0, 0, $w, $h)
186			if $img->w != $w \|\| $img->h != $h;
187	root	1.1
188			$self->set_background ($img);
189			$self->scr_recolour (0);
190			$self->want_refresh;
191			}
192
193			sub on_start {
194			my ($self) = @_;
195
196			$self->set_expr (parse_expr $EXPR);
197
198			()
199			}
200