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

#! perl

our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
$EXPR = '
   rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
   clip X, Y, W, H, repeat_mirror,
   load "/root/pix/das_fette_schwein.jpg"
';
#$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);

our $MIN_INTERVAL = 1/100;

{
   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() {
      $new->{rootpmap_sensitive} = 1;
      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) = @_;

   # rate limit evaluation

   if ($self->{next_refresh} > urxvt::NOW) {
      $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
         $self->recalculate;
      });
   }

   $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;

   # set environment to evaluate user expression

   local $bgdsl_self = $self;

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

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

   # evaluate user expression

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

   # if the expression is sensitive to external events, prepare reevaluation then

   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");
   }

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

   # clear stuff we no longer need

   %$old = ();

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

   # prepare and set background pixmap

   $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:	1.10
Committed:	Tue Jun 5 14:53:16 2012 UTC (11 years, 11 months ago) by root
Branch:	MAIN
Changes since 1.9:	+12 -2 lines
Log Message:	* empty log message *
#	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	$EXPR = '
5	root	1.9	rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
6	root	1.7	clip X, Y, W, H, repeat_mirror,
7			load "/root/pix/das_fette_schwein.jpg"
8			';
9	root	1.1	#$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	1.10	our $MIN_INTERVAL = 1/100;
19	root	1.9
20	root	1.1	{
21			package urxvt::bgdsl; # background language
22
23			*repeat_black = \&urxvt::RepeatNone; #TODO wtf
24			*repeat_wrap = \&urxvt::RepeatNormal;
25			*repeat_pad = \&urxvt::RepeatPad;
26			*repeat_mirror = \&urxvt::RepeatReflect;
27
28	root	1.2	sub load($) {
29	root	1.1	my ($path) = @_;
30
31	root	1.3	$new->{load}{$path} = $old->{load}{$path} \|\| $bgdsl_self->new_img_from_file ($path);
32	root	1.1	}
33
34	root	1.2	sub root() {
35	root	1.9	$new->{rootpmap_sensitive} = 1;
36	root	1.1	die "root op not supported, exg, we need you";
37			}
38
39	root	1.4	# sub clone($) {
40			# $_[0]->clone
41			# }
42
43	root	1.7	sub clip($$$$$;$) {
44			my $img = pop;
45			$img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
46	root	1.4	}
47
48	root	1.2	sub resize($$$) {
49	root	1.7	my $img = pop;
50			$img->scale ($_[0], $_[1])
51	root	1.1	}
52
53	root	1.7	# TODO: ugly
54			sub move($$;$) {
55			my $img = pop;
56			$img->sub_rect (
57			$_[0], $_[1],
58			$img->w, $img->h,
59			$_[2],
60	root	1.1	)
61			}
62
63	root	1.4	sub rotate($$$$$$;$) {
64	root	1.7	my $img = pop;
65			$img->rotate (
66			$_[0],
67	root	1.4	$_[1],
68	root	1.7	$_[2] * $img->w * .01,
69			$_[3] * $img->h * .01,
70			$_[4] * (3.14159265 / 180),
71			$_[5],
72	root	1.4	)
73	root	1.1	}
74
75	root	1.2	sub blur($$$) {
76	root	1.7	my ($rh, $rv, $img) = @_;
77	root	1.1
78			$img = $img->clone;
79	root	1.4	$img->blur ($rh, $rv);
80	root	1.1	$img
81			}
82
83	root	1.2	sub contrast($$;$$;$) {
84	root	1.7	my $img = pop;
85			my ($r, $g, $b, $a) = @_;
86	root	1.4
87	root	1.1	($g, $b) = ($r, $r) if @_ < 4;
88			$a = 1 if @_ < 5;
89	root	1.4
90	root	1.1	$img = $img->clone;
91			$img->contrast ($r, $g, $b, $a);
92			$img
93			}
94
95	root	1.2	sub brightness($$;$$;$) {
96	root	1.7	my $img = pop;
97			my ($r, $g, $b, $a) = @_;
98	root	1.4
99	root	1.1	($g, $b) = ($r, $r) if @_ < 4;
100			$a = 1 if @_ < 5;
101	root	1.4
102	root	1.1	$img = $img->clone;
103			$img->brightness ($r, $g, $b, $a);
104			$img
105			}
106
107	root	1.4	sub X() { $new->{position_sensitive} = 1; $l }
108			sub Y() { $new->{position_sensitive} = 1; $t }
109			sub W() { $new->{size_sensitive} = 1; $w }
110			sub H() { $new->{size_sensitive} = 1; $h }
111	root	1.3
112	root	1.2	sub now() { urxvt::NOW }
113	root	1.1
114	root	1.2	sub again($) {
115	root	1.1	$new->{again} = $_[0];
116			}
117
118	root	1.2	sub counter($) {
119	root	1.1	$new->{again} = $_[0];
120	root	1.7	$bgdsl_self->{counter} + 0
121	root	1.1	}
122			}
123
124			sub parse_expr {
125			my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
126			die if $@;
127			$expr
128			}
129
130			# compiles a parsed expression
131			sub set_expr {
132			my ($self, $expr) = @_;
133
134			$self->{expr} = $expr;
135			$self->recalculate;
136			}
137
138			# evaluate the current bg expression
139			sub recalculate {
140			my ($self) = @_;
141
142	root	1.10	# rate limit evaluation
143
144	root	1.9	if ($self->{next_refresh} > urxvt::NOW) {
145			$self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
146			$self->recalculate;
147			});
148			}
149
150			$self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
151
152	root	1.10	# set environment to evaluate user expression
153	root	1.6
154	root	1.3	local $bgdsl_self = $self;
155	root	1.1
156	root	1.3	local $old = $self->{state};
157			local $new = my $state = $self->{state} = {};
158	root	1.1
159	root	1.3	($l, $t, $w, $h) =
160	root	1.1	$self->get_geometry;
161
162	root	1.10	# evaluate user expression
163
164	root	1.1	my $img = eval { $self->{expr}->() };
165			warn $@ if $@;#d#
166
167	root	1.10	# if the expression is sensitive to external events, prepare reevaluation then
168
169	root	1.2	my $repeat;
170
171	root	1.1	if (my $again = $state->{again}) {
172	root	1.2	$repeat = 1;
173	root	1.6	$state->{timer} = $again == $old->{again}
174			? $old->{timer}
175	root	1.7	: urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
176			++$self->{counter};
177			$self->recalculate
178			});
179	root	1.1	}
180
181	root	1.2	if (delete $state->{position_sensitive}) {
182			$repeat = 1;
183			$self->enable (position_change => sub { $_[0]->recalculate });
184			} else {
185			$self->disable ("position_change");
186			}
187
188			if (delete $state->{size_sensitive}) {
189			$repeat = 1;
190			$self->enable (size_change => sub { $_[0]->recalculate });
191			} else {
192			$self->disable ("size_change");
193			}
194
195	root	1.9	if (delete $state->{rootpmap_sensitive}) {
196			$repeat = 1;
197			$self->enable (rootpmap_change => sub { $_[0]->recalculate });
198			} else {
199			$self->disable ("rootpmap_change");
200			}
201
202	root	1.10	# clear stuff we no longer need
203
204	root	1.6	%$old = ();
205
206	root	1.5	unless ($repeat) {
207			delete $self->{state};
208			delete $self->{expr};
209			}
210
211	root	1.10	# prepare and set background pixmap
212
213	root	1.4	$img = $img->sub_rect (0, 0, $w, $h)
214			if $img->w != $w \|\| $img->h != $h;
215	root	1.1
216			$self->set_background ($img);
217			$self->scr_recolour (0);
218			$self->want_refresh;
219			}
220
221			sub on_start {
222			my ($self) = @_;
223
224			$self->set_expr (parse_expr $EXPR);
225
226			()
227			}
228