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Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.4 by root, Tue Jun 5 13:39:26 2012 UTC vs.
Revision 1.15 by root, Tue Jun 5 22:46:50 2012 UTC

1#! perl 1#! perl
2 2
3#:META:RESOURCE:$$:string:background expression
4#:META:RESOURCE:$$-enable:boolean:some boolean
5
3our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y'; 6our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
4$EXPR = 'rotate load "/root/pix/das_fette_schwein.jpg", W, H, 50, 50, counter 1/60, repeat_mirror'; 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"';
5#$EXPR = 'blur root, 10, 10' 13#$EXPR = 'blur root, 10, 10'
6#$EXPR = 'blur move (root, -x, -y), 5, 5' 14#$EXPR = 'blur move (root, -x, -y), 5, 5'
7#resize load "/root/pix/das_fette_schwein.jpg", w, h 15#resize load "/root/pix/das_fette_schwein.jpg", w, h
8 16
9use Safe; 17use Safe;
10 18
11our ($bgdsl_self, $old, $new); 19our ($bgdsl_self, $old, $new);
12our ($l, $t, $w, $h); 20our ($l, $t, $w, $h);
21
22# enforce at leats this time between updates
23our $MIN_INTERVAL = 1/100;
13 24
14{ 25{
15 package urxvt::bgdsl; # background language 26 package urxvt::bgdsl; # background language
16 27
17 *repeat_black = \&urxvt::RepeatNone; #TODO wtf 28 *repeat_black = \&urxvt::RepeatNone; #TODO wtf
18 *repeat_wrap = \&urxvt::RepeatNormal; 29 *repeat_wrap = \&urxvt::RepeatNormal;
19 *repeat_pad = \&urxvt::RepeatPad; 30 *repeat_pad = \&urxvt::RepeatPad;
20 *repeat_mirror = \&urxvt::RepeatReflect; 31 *repeat_mirror = \&urxvt::RepeatReflect;
21 32
33=head2 PROVIDERS/GENERATORS
34
35=over 4
36
37=item load $path
38
39=cut
40
22 sub load($) { 41 sub load($) {
23 my ($path) = @_; 42 my ($path) = @_;
24 43
25 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path); 44 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path);
26 } 45 }
27 46
28 sub root() { 47 sub root() {
48 $new->{rootpmap_sensitive} = 1;
29 die "root op not supported, exg, we need you"; 49 die "root op not supported, exg, we need you";
30 } 50 }
51
52 sub solid($;$$) {
53 my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1);
54 $img->fill ($_[0]);
55 $img
56 }
57
58=back
59
60=head2 OPERATORS
61
62=over 4
63
64=cut
31 65
32# sub clone($) { 66# sub clone($) {
33# $_[0]->clone 67# $_[0]->clone
34# } 68# }
35 69
36 sub subrect($$$$$;$) { 70 sub clip($$$$$;$) {
71 my $img = pop;
37 $_[0]->sub_rect ($_[1], $_[2], $_[3], $_[4], $_[5]) 72 $img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
38 } 73 }
39 74
40 sub resize($$$) { 75 sub resize($$$) {
41 $_[0]->scale ($_[1], $_[2]) 76 my $img = pop;
77 $img->scale ($_[0], $_[1])
42 } 78 }
43 79
80 # TODO: ugly
44 sub move($$$;$) { 81 sub move($$;$) {
45 # TODO: must be simpler 82 my $img = pop;
46 $_[0]->transform ($_[0]->w, $_[0]->h, 83 $img->sub_rect (
47 1, 0, $_[1], 84 $_[0], $_[1],
48 0, 1, $_[2], 85 $img->w, $img->h,
49 0, 0, 1,
50 $_[3], 86 $_[2],
51 ) 87 )
52 } 88 }
53 89
54 sub rotate($$$$$$;$) { 90 sub rotate($$$$$$;$) {
91 my $img = pop;
55 $_[0]->rotate ( 92 $img->rotate (
93 $_[0],
56 $_[1], 94 $_[1],
57 $_[2],
58 $_[3] * $_[0]->w * .01, 95 $_[2] * $img->w * .01,
59 $_[4] * $_[0]->h * .01, 96 $_[3] * $img->h * .01,
60 $_[5] * (3.14159265 / 180), 97 $_[4] * (3.14159265 / 180),
61 $_[6], 98 $_[5],
62 ) 99 )
63 } 100 }
64 101
65 sub blur($$$) { 102 sub blur($$$) {
66 my ($img, $rh, $rv) = @_; 103 my ($rh, $rv, $img) = @_;
67 104
68 $img = $img->clone;
69 $img->blur ($rh, $rv); 105 $img->blur ($rh, $rv);
70 $img
71 } 106 }
72 107
73 sub contrast($$;$$;$) { 108 sub contrast($$;$$;$) {
109 my $img = pop;
74 my ($img, $r, $g, $b, $a) = @_; 110 my ($r, $g, $b, $a) = @_;
75 111
76 ($g, $b) = ($r, $r) if @_ < 4; 112 ($g, $b) = ($r, $r) if @_ < 4;
77 $a = 1 if @_ < 5; 113 $a = 1 if @_ < 5;
78 114
79 $img = $img->clone; 115 $img = $img->clone;
80 $img->contrast ($r, $g, $b, $a); 116 $img->contrast ($r, $g, $b, $a);
81 $img 117 $img
82 } 118 }
83 119
84 sub brightness($$;$$;$) { 120 sub brightness($$;$$;$) {
121 my $img = pop;
85 my ($img, $r, $g, $b, $a) = @_; 122 my ($r, $g, $b, $a) = @_;
86 123
87 ($g, $b) = ($r, $r) if @_ < 4; 124 ($g, $b) = ($r, $r) if @_ < 4;
88 $a = 1 if @_ < 5; 125 $a = 1 if @_ < 5;
89 126
90 $img = $img->clone; 127 $img = $img->clone;
… …
103 $new->{again} = $_[0]; 140 $new->{again} = $_[0];
104 } 141 }
105 142
106 sub counter($) { 143 sub counter($) {
107 $new->{again} = $_[0]; 144 $new->{again} = $_[0];
108 $bgdsl_self->{counter}++ + 0 145 $bgdsl_self->{counter} + 0
109 } 146 }
147
148=back
149
150=cut
151
110} 152}
111 153
112sub parse_expr { 154sub parse_expr {
113 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}";
114 die if $@; 156 die if $@;
… …
125 167
126# evaluate the current bg expression 168# evaluate the current bg expression
127sub recalculate { 169sub recalculate {
128 my ($self) = @_; 170 my ($self) = @_;
129 171
172 # rate limit evaluation
173
174 if ($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
130 local $bgdsl_self = $self; 185 local $bgdsl_self = $self;
131 186
132 local $old = $self->{state}; 187 local $old = $self->{state};
133 local $new = my $state = $self->{state} = {}; 188 local $new = my $state = $self->{state} = {};
134 189
135 ($l, $t, $w, $h) = 190 ($l, $t, $w, $h) =
136 $self->get_geometry; 191 $self->get_geometry;
137 192
193 # evaluate user expression
194
138 my $img = eval { $self->{expr}->() }; 195 my $img = eval { $self->{expr}->() };
139 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
140 200
141 my $repeat; 201 my $repeat;
142 202
143 if (my $again = $state->{again}) { 203 if (my $again = $state->{again}) {
144 $repeat = 1; 204 $repeat = 1;
145 $state->{again} = urxvt::timer->new->after ($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 });
146 } 211 }
147 212
148 if (delete $state->{position_sensitive}) { 213 if (delete $state->{position_sensitive}) {
149 $repeat = 1; 214 $repeat = 1;
150 $self->enable (position_change => sub { $_[0]->recalculate }); 215 $self->enable (position_change => sub { $_[0]->recalculate });
… …
157 $self->enable (size_change => sub { $_[0]->recalculate }); 222 $self->enable (size_change => sub { $_[0]->recalculate });
158 } else { 223 } else {
159 $self->disable ("size_change"); 224 $self->disable ("size_change");
160 } 225 }
161 226
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
162 $img = $img->sub_rect (0, 0, $w, $h) 245 $img = $img->sub_rect (0, 0, $w, $h)
163 if $img->w != $w || $img->h != $h; 246 if $img->w != $w || $img->h != $h;
164 247
165 $self->set_background ($img); 248 $self->set_background ($img);
166 $self->scr_recolour (0); 249 $self->scr_recolour (0);

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