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Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.1 by root, Mon Jun 4 21:39:56 2012 UTC vs.
Revision 1.15 by root, Tue Jun 5 22:46:50 2012 UTC

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

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