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

#! perl

#:META:RESOURCE:$$:string:background expression
#:META:RESOURCE:$$-enable:boolean:some boolean

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"
';
$EXPR = 'solid "red"';
#$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;

=head2 PROVIDERS/GENERATORS

=over 4

=item load $path

=cut

   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 solid($;$$) {
      my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1);
      $img->fill ($_[0]);
      $img
   }

=back

=head2 OPERATORS

=over 4

=cut

#   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
   }

=back

=cut

}

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#
   die if !UNIVERSAL::isa $img, "urxvt::img";

   # 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:	1.15
Committed:	Tue Jun 5 22:46:50 2012 UTC (11 years, 11 months ago) by root
Branch:	MAIN
Changes since 1.14:	+29 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#! perl
2
3	root	1.13	#:META:RESOURCE:$$:string:background expression
4	root	1.14	#:META:RESOURCE:$$-enable:boolean:some boolean
5	root	1.12
6	root	1.4	our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
7	root	1.7	$EXPR = '
8	root	1.9	rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
9	root	1.7	clip X, Y, W, H, repeat_mirror,
10			load "/root/pix/das_fette_schwein.jpg"
11			';
12	root	1.15	$EXPR = 'solid "red"';
13	root	1.1	#$EXPR = 'blur root, 10, 10'
14			#$EXPR = 'blur move (root, -x, -y), 5, 5'
15			#resize load "/root/pix/das_fette_schwein.jpg", w, h
16
17			use Safe;
18
19	root	1.3	our ($bgdsl_self, $old, $new);
20			our ($l, $t, $w, $h);
21
22	root	1.12	# enforce at leats this time between updates
23	root	1.10	our $MIN_INTERVAL = 1/100;
24	root	1.9
25	root	1.1	{
26			package urxvt::bgdsl; # background language
27
28			*repeat_black = \&urxvt::RepeatNone; #TODO wtf
29			*repeat_wrap = \&urxvt::RepeatNormal;
30			*repeat_pad = \&urxvt::RepeatPad;
31			*repeat_mirror = \&urxvt::RepeatReflect;
32
33	root	1.15	=head2 PROVIDERS/GENERATORS
34
35			=over 4
36
37			=item load $path
38
39			=cut
40
41	root	1.2	sub load($) {
42	root	1.1	my ($path) = @_;
43
44	root	1.3	$new->{load}{$path} = $old->{load}{$path} \|\| $bgdsl_self->new_img_from_file ($path);
45	root	1.1	}
46
47	root	1.2	sub root() {
48	root	1.9	$new->{rootpmap_sensitive} = 1;
49	root	1.1	die "root op not supported, exg, we need you";
50			}
51
52	root	1.15	sub solid($;$$) {
53			my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] \|\| 1, $_[2] \|\| 1);
54			$img->fill ($_[0]);
55			$img
56			}
57
58			=back
59
60			=head2 OPERATORS
61
62			=over 4
63
64			=cut
65
66	root	1.4	# sub clone($) {
67			# $_[0]->clone
68			# }
69
70	root	1.7	sub clip($$$$$;$) {
71			my $img = pop;
72			$img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
73	root	1.4	}
74
75	root	1.2	sub resize($$$) {
76	root	1.7	my $img = pop;
77			$img->scale ($_[0], $_[1])
78	root	1.1	}
79
80	root	1.7	# TODO: ugly
81			sub move($$;$) {
82			my $img = pop;
83			$img->sub_rect (
84			$_[0], $_[1],
85			$img->w, $img->h,
86			$_[2],
87	root	1.1	)
88			}
89
90	root	1.4	sub rotate($$$$$$;$) {
91	root	1.7	my $img = pop;
92			$img->rotate (
93			$_[0],
94	root	1.4	$_[1],
95	root	1.7	$_[2] * $img->w * .01,
96			$_[3] * $img->h * .01,
97			$_[4] * (3.14159265 / 180),
98			$_[5],
99	root	1.4	)
100	root	1.1	}
101
102	root	1.2	sub blur($$$) {
103	root	1.7	my ($rh, $rv, $img) = @_;
104	root	1.1
105	root	1.4	$img->blur ($rh, $rv);
106	root	1.1	}
107
108	root	1.2	sub contrast($$;$$;$) {
109	root	1.7	my $img = pop;
110			my ($r, $g, $b, $a) = @_;
111	root	1.4
112	root	1.1	($g, $b) = ($r, $r) if @_ < 4;
113			$a = 1 if @_ < 5;
114	root	1.4
115	root	1.1	$img = $img->clone;
116			$img->contrast ($r, $g, $b, $a);
117			$img
118			}
119
120	root	1.2	sub brightness($$;$$;$) {
121	root	1.7	my $img = pop;
122			my ($r, $g, $b, $a) = @_;
123	root	1.4
124	root	1.1	($g, $b) = ($r, $r) if @_ < 4;
125			$a = 1 if @_ < 5;
126	root	1.4
127	root	1.1	$img = $img->clone;
128			$img->brightness ($r, $g, $b, $a);
129			$img
130			}
131
132	root	1.4	sub X() { $new->{position_sensitive} = 1; $l }
133			sub Y() { $new->{position_sensitive} = 1; $t }
134			sub W() { $new->{size_sensitive} = 1; $w }
135			sub H() { $new->{size_sensitive} = 1; $h }
136	root	1.3
137	root	1.2	sub now() { urxvt::NOW }
138	root	1.1
139	root	1.2	sub again($) {
140	root	1.1	$new->{again} = $_[0];
141			}
142
143	root	1.2	sub counter($) {
144	root	1.1	$new->{again} = $_[0];
145	root	1.7	$bgdsl_self->{counter} + 0
146	root	1.1	}
147	root	1.15
148			=back
149
150			=cut
151
152	root	1.1	}
153
154			sub parse_expr {
155			my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
156			die if $@;
157			$expr
158			}
159
160			# compiles a parsed expression
161			sub set_expr {
162			my ($self, $expr) = @_;
163
164			$self->{expr} = $expr;
165			$self->recalculate;
166			}
167
168			# evaluate the current bg expression
169			sub recalculate {
170			my ($self) = @_;
171
172	root	1.10	# rate limit evaluation
173
174	root	1.9	if ($self->{next_refresh} > urxvt::NOW) {
175			$self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
176			$self->recalculate;
177			});
178	root	1.12	return;
179	root	1.9	}
180
181			$self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
182
183	root	1.10	# set environment to evaluate user expression
184	root	1.6
185	root	1.3	local $bgdsl_self = $self;
186	root	1.1
187	root	1.3	local $old = $self->{state};
188			local $new = my $state = $self->{state} = {};
189	root	1.1
190	root	1.3	($l, $t, $w, $h) =
191	root	1.1	$self->get_geometry;
192
193	root	1.10	# evaluate user expression
194
195	root	1.1	my $img = eval { $self->{expr}->() };
196			warn $@ if $@;#d#
197	root	1.15	die if !UNIVERSAL::isa $img, "urxvt::img";
198	root	1.1
199	root	1.10	# if the expression is sensitive to external events, prepare reevaluation then
200
201	root	1.2	my $repeat;
202
203	root	1.1	if (my $again = $state->{again}) {
204	root	1.2	$repeat = 1;
205	root	1.6	$state->{timer} = $again == $old->{again}
206			? $old->{timer}
207	root	1.7	: urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
208			++$self->{counter};
209			$self->recalculate
210			});
211	root	1.1	}
212
213	root	1.2	if (delete $state->{position_sensitive}) {
214			$repeat = 1;
215			$self->enable (position_change => sub { $_[0]->recalculate });
216			} else {
217			$self->disable ("position_change");
218			}
219
220			if (delete $state->{size_sensitive}) {
221			$repeat = 1;
222			$self->enable (size_change => sub { $_[0]->recalculate });
223			} else {
224			$self->disable ("size_change");
225			}
226
227	root	1.9	if (delete $state->{rootpmap_sensitive}) {
228			$repeat = 1;
229			$self->enable (rootpmap_change => sub { $_[0]->recalculate });
230			} else {
231			$self->disable ("rootpmap_change");
232			}
233
234	root	1.10	# clear stuff we no longer need
235
236	root	1.6	%$old = ();
237
238	root	1.5	unless ($repeat) {
239			delete $self->{state};
240			delete $self->{expr};
241			}
242
243	root	1.10	# prepare and set background pixmap
244
245	root	1.4	$img = $img->sub_rect (0, 0, $w, $h)
246			if $img->w != $w \|\| $img->h != $h;
247	root	1.1
248			$self->set_background ($img);
249			$self->scr_recolour (0);
250			$self->want_refresh;
251			}
252
253			sub on_start {
254			my ($self) = @_;
255
256			$self->set_expr (parse_expr $EXPR);
257
258			()
259			}
260