[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 = '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:	1.14
Committed:	Tue Jun 5 22:23:07 2012 UTC (11 years, 11 months ago) by root
Branch:	MAIN
Changes since 1.13:	+1 -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	$EXPR = '
8	root	1.9	rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
9	root	1.7	clip X, Y, W, H, repeat_mirror,
10			load "/root/pix/das_fette_schwein.jpg"
11			';
12	root	1.1	#$EXPR = 'blur root, 10, 10'
13			#$EXPR = 'blur move (root, -x, -y), 5, 5'
14			#resize load "/root/pix/das_fette_schwein.jpg", w, h
15
16			use Safe;
17
18	root	1.3	our ($bgdsl_self, $old, $new);
19			our ($l, $t, $w, $h);
20
21	root	1.12	# enforce at leats this time between updates
22	root	1.10	our $MIN_INTERVAL = 1/100;
23	root	1.9
24	root	1.1	{
25			package urxvt::bgdsl; # background language
26
27			*repeat_black = \&urxvt::RepeatNone; #TODO wtf
28			*repeat_wrap = \&urxvt::RepeatNormal;
29			*repeat_pad = \&urxvt::RepeatPad;
30			*repeat_mirror = \&urxvt::RepeatReflect;
31
32	root	1.2	sub load($) {
33	root	1.1	my ($path) = @_;
34
35	root	1.3	$new->{load}{$path} = $old->{load}{$path} \|\| $bgdsl_self->new_img_from_file ($path);
36	root	1.1	}
37
38	root	1.2	sub root() {
39	root	1.9	$new->{rootpmap_sensitive} = 1;
40	root	1.1	die "root op not supported, exg, we need you";
41			}
42
43	root	1.4	# sub clone($) {
44			# $_[0]->clone
45			# }
46
47	root	1.7	sub clip($$$$$;$) {
48			my $img = pop;
49			$img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
50	root	1.4	}
51
52	root	1.2	sub resize($$$) {
53	root	1.7	my $img = pop;
54			$img->scale ($_[0], $_[1])
55	root	1.1	}
56
57	root	1.7	# TODO: ugly
58			sub move($$;$) {
59			my $img = pop;
60			$img->sub_rect (
61			$_[0], $_[1],
62			$img->w, $img->h,
63			$_[2],
64	root	1.1	)
65			}
66
67	root	1.4	sub rotate($$$$$$;$) {
68	root	1.7	my $img = pop;
69			$img->rotate (
70			$_[0],
71	root	1.4	$_[1],
72	root	1.7	$_[2] * $img->w * .01,
73			$_[3] * $img->h * .01,
74			$_[4] * (3.14159265 / 180),
75			$_[5],
76	root	1.4	)
77	root	1.1	}
78
79	root	1.2	sub blur($$$) {
80	root	1.7	my ($rh, $rv, $img) = @_;
81	root	1.1
82	root	1.4	$img->blur ($rh, $rv);
83	root	1.1	}
84
85	root	1.2	sub contrast($$;$$;$) {
86	root	1.7	my $img = pop;
87			my ($r, $g, $b, $a) = @_;
88	root	1.4
89	root	1.1	($g, $b) = ($r, $r) if @_ < 4;
90			$a = 1 if @_ < 5;
91	root	1.4
92	root	1.1	$img = $img->clone;
93			$img->contrast ($r, $g, $b, $a);
94			$img
95			}
96
97	root	1.2	sub brightness($$;$$;$) {
98	root	1.7	my $img = pop;
99			my ($r, $g, $b, $a) = @_;
100	root	1.4
101	root	1.1	($g, $b) = ($r, $r) if @_ < 4;
102			$a = 1 if @_ < 5;
103	root	1.4
104	root	1.1	$img = $img->clone;
105			$img->brightness ($r, $g, $b, $a);
106			$img
107			}
108
109	root	1.4	sub X() { $new->{position_sensitive} = 1; $l }
110			sub Y() { $new->{position_sensitive} = 1; $t }
111			sub W() { $new->{size_sensitive} = 1; $w }
112			sub H() { $new->{size_sensitive} = 1; $h }
113	root	1.3
114	root	1.2	sub now() { urxvt::NOW }
115	root	1.1
116	root	1.2	sub again($) {
117	root	1.1	$new->{again} = $_[0];
118			}
119
120	root	1.2	sub counter($) {
121	root	1.1	$new->{again} = $_[0];
122	root	1.7	$bgdsl_self->{counter} + 0
123	root	1.1	}
124			}
125
126			sub parse_expr {
127			my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
128			die if $@;
129			$expr
130			}
131
132			# compiles a parsed expression
133			sub set_expr {
134			my ($self, $expr) = @_;
135
136			$self->{expr} = $expr;
137			$self->recalculate;
138			}
139
140			# evaluate the current bg expression
141			sub recalculate {
142			my ($self) = @_;
143
144	root	1.10	# rate limit evaluation
145
146	root	1.9	if ($self->{next_refresh} > urxvt::NOW) {
147			$self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
148			$self->recalculate;
149			});
150	root	1.12	return;
151	root	1.9	}
152
153			$self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
154
155	root	1.10	# set environment to evaluate user expression
156	root	1.6
157	root	1.3	local $bgdsl_self = $self;
158	root	1.1
159	root	1.3	local $old = $self->{state};
160			local $new = my $state = $self->{state} = {};
161	root	1.1
162	root	1.3	($l, $t, $w, $h) =
163	root	1.1	$self->get_geometry;
164
165	root	1.10	# evaluate user expression
166
167	root	1.1	my $img = eval { $self->{expr}->() };
168			warn $@ if $@;#d#
169
170	root	1.10	# if the expression is sensitive to external events, prepare reevaluation then
171
172	root	1.2	my $repeat;
173
174	root	1.1	if (my $again = $state->{again}) {
175	root	1.2	$repeat = 1;
176	root	1.6	$state->{timer} = $again == $old->{again}
177			? $old->{timer}
178	root	1.7	: urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
179			++$self->{counter};
180			$self->recalculate
181			});
182	root	1.1	}
183
184	root	1.2	if (delete $state->{position_sensitive}) {
185			$repeat = 1;
186			$self->enable (position_change => sub { $_[0]->recalculate });
187			} else {
188			$self->disable ("position_change");
189			}
190
191			if (delete $state->{size_sensitive}) {
192			$repeat = 1;
193			$self->enable (size_change => sub { $_[0]->recalculate });
194			} else {
195			$self->disable ("size_change");
196			}
197
198	root	1.9	if (delete $state->{rootpmap_sensitive}) {
199			$repeat = 1;
200			$self->enable (rootpmap_change => sub { $_[0]->recalculate });
201			} else {
202			$self->disable ("rootpmap_change");
203			}
204
205	root	1.10	# clear stuff we no longer need
206
207	root	1.6	%$old = ();
208
209	root	1.5	unless ($repeat) {
210			delete $self->{state};
211			delete $self->{expr};
212			}
213
214	root	1.10	# prepare and set background pixmap
215
216	root	1.4	$img = $img->sub_rect (0, 0, $w, $h)
217			if $img->w != $w \|\| $img->h != $h;
218	root	1.1
219			$self->set_background ($img);
220			$self->scr_recolour (0);
221			$self->want_refresh;
222			}
223
224			sub on_start {
225			my ($self) = @_;
226
227			$self->set_expr (parse_expr $EXPR);
228
229			()
230			}
231