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

#! perl

#:META:RESOURCE:$$:string:background expression

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);

# enforce at leats this time between updates
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) = @_;

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

   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;
      });
      return;
   }

   $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:	1.13
Committed:	Tue Jun 5 19:32:29 2012 UTC (11 years, 11 months ago) by root
Branch:	MAIN
Changes since 1.12:	+1 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#! perl
2
3	root	1.13	#:META:RESOURCE:$$:string:background expression
4	root	1.12
5	root	1.4	our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
6	root	1.7	$EXPR = '
7	root	1.9	rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
8	root	1.7	clip X, Y, W, H, repeat_mirror,
9			load "/root/pix/das_fette_schwein.jpg"
10			';
11	root	1.1	#$EXPR = 'blur root, 10, 10'
12			#$EXPR = 'blur move (root, -x, -y), 5, 5'
13			#resize load "/root/pix/das_fette_schwein.jpg", w, h
14
15			use Safe;
16
17	root	1.3	our ($bgdsl_self, $old, $new);
18			our ($l, $t, $w, $h);
19
20	root	1.12	# enforce at leats this time between updates
21	root	1.10	our $MIN_INTERVAL = 1/100;
22	root	1.9
23	root	1.1	{
24			package urxvt::bgdsl; # background language
25
26			*repeat_black = \&urxvt::RepeatNone; #TODO wtf
27			*repeat_wrap = \&urxvt::RepeatNormal;
28			*repeat_pad = \&urxvt::RepeatPad;
29			*repeat_mirror = \&urxvt::RepeatReflect;
30
31	root	1.2	sub load($) {
32	root	1.1	my ($path) = @_;
33
34	root	1.3	$new->{load}{$path} = $old->{load}{$path} \|\| $bgdsl_self->new_img_from_file ($path);
35	root	1.1	}
36
37	root	1.2	sub root() {
38	root	1.9	$new->{rootpmap_sensitive} = 1;
39	root	1.1	die "root op not supported, exg, we need you";
40			}
41
42	root	1.4	# sub clone($) {
43			# $_[0]->clone
44			# }
45
46	root	1.7	sub clip($$$$$;$) {
47			my $img = pop;
48			$img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
49	root	1.4	}
50
51	root	1.2	sub resize($$$) {
52	root	1.7	my $img = pop;
53			$img->scale ($_[0], $_[1])
54	root	1.1	}
55
56	root	1.7	# TODO: ugly
57			sub move($$;$) {
58			my $img = pop;
59			$img->sub_rect (
60			$_[0], $_[1],
61			$img->w, $img->h,
62			$_[2],
63	root	1.1	)
64			}
65
66	root	1.4	sub rotate($$$$$$;$) {
67	root	1.7	my $img = pop;
68			$img->rotate (
69			$_[0],
70	root	1.4	$_[1],
71	root	1.7	$_[2] * $img->w * .01,
72			$_[3] * $img->h * .01,
73			$_[4] * (3.14159265 / 180),
74			$_[5],
75	root	1.4	)
76	root	1.1	}
77
78	root	1.2	sub blur($$$) {
79	root	1.7	my ($rh, $rv, $img) = @_;
80	root	1.1
81	root	1.4	$img->blur ($rh, $rv);
82	root	1.1	}
83
84	root	1.2	sub contrast($$;$$;$) {
85	root	1.7	my $img = pop;
86			my ($r, $g, $b, $a) = @_;
87	root	1.4
88	root	1.1	($g, $b) = ($r, $r) if @_ < 4;
89			$a = 1 if @_ < 5;
90	root	1.4
91	root	1.1	$img = $img->clone;
92			$img->contrast ($r, $g, $b, $a);
93			$img
94			}
95
96	root	1.2	sub brightness($$;$$;$) {
97	root	1.7	my $img = pop;
98			my ($r, $g, $b, $a) = @_;
99	root	1.4
100	root	1.1	($g, $b) = ($r, $r) if @_ < 4;
101			$a = 1 if @_ < 5;
102	root	1.4
103	root	1.1	$img = $img->clone;
104			$img->brightness ($r, $g, $b, $a);
105			$img
106			}
107
108	root	1.4	sub X() { $new->{position_sensitive} = 1; $l }
109			sub Y() { $new->{position_sensitive} = 1; $t }
110			sub W() { $new->{size_sensitive} = 1; $w }
111			sub H() { $new->{size_sensitive} = 1; $h }
112	root	1.3
113	root	1.2	sub now() { urxvt::NOW }
114	root	1.1
115	root	1.2	sub again($) {
116	root	1.1	$new->{again} = $_[0];
117			}
118
119	root	1.2	sub counter($) {
120	root	1.1	$new->{again} = $_[0];
121	root	1.7	$bgdsl_self->{counter} + 0
122	root	1.1	}
123			}
124
125			sub parse_expr {
126			my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
127			die if $@;
128			$expr
129			}
130
131			# compiles a parsed expression
132			sub set_expr {
133			my ($self, $expr) = @_;
134
135			$self->{expr} = $expr;
136			$self->recalculate;
137			}
138
139			# evaluate the current bg expression
140			sub recalculate {
141			my ($self) = @_;
142
143	root	1.10	# rate limit evaluation
144
145	root	1.9	if ($self->{next_refresh} > urxvt::NOW) {
146			$self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
147			$self->recalculate;
148			});
149	root	1.12	return;
150	root	1.9	}
151
152			$self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
153
154	root	1.10	# set environment to evaluate user expression
155	root	1.6
156	root	1.3	local $bgdsl_self = $self;
157	root	1.1
158	root	1.3	local $old = $self->{state};
159			local $new = my $state = $self->{state} = {};
160	root	1.1
161	root	1.3	($l, $t, $w, $h) =
162	root	1.1	$self->get_geometry;
163
164	root	1.10	# evaluate user expression
165
166	root	1.1	my $img = eval { $self->{expr}->() };
167			warn $@ if $@;#d#
168
169	root	1.10	# if the expression is sensitive to external events, prepare reevaluation then
170
171	root	1.2	my $repeat;
172
173	root	1.1	if (my $again = $state->{again}) {
174	root	1.2	$repeat = 1;
175	root	1.6	$state->{timer} = $again == $old->{again}
176			? $old->{timer}
177	root	1.7	: urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
178			++$self->{counter};
179			$self->recalculate
180			});
181	root	1.1	}
182
183	root	1.2	if (delete $state->{position_sensitive}) {
184			$repeat = 1;
185			$self->enable (position_change => sub { $_[0]->recalculate });
186			} else {
187			$self->disable ("position_change");
188			}
189
190			if (delete $state->{size_sensitive}) {
191			$repeat = 1;
192			$self->enable (size_change => sub { $_[0]->recalculate });
193			} else {
194			$self->disable ("size_change");
195			}
196
197	root	1.9	if (delete $state->{rootpmap_sensitive}) {
198			$repeat = 1;
199			$self->enable (rootpmap_change => sub { $_[0]->recalculate });
200			} else {
201			$self->disable ("rootpmap_change");
202			}
203
204	root	1.10	# clear stuff we no longer need
205
206	root	1.6	%$old = ();
207
208	root	1.5	unless ($repeat) {
209			delete $self->{state};
210			delete $self->{expr};
211			}
212
213	root	1.10	# prepare and set background pixmap
214
215	root	1.4	$img = $img->sub_rect (0, 0, $w, $h)
216			if $img->w != $w \|\| $img->h != $h;
217	root	1.1
218			$self->set_background ($img);
219			$self->scr_recolour (0);
220			$self->want_refresh;
221			}
222
223			sub on_start {
224			my ($self) = @_;
225
226			$self->set_expr (parse_expr $EXPR);
227
228			()
229			}
230