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Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.3 by root, Tue Jun 5 12:08:23 2012 UTC vs.
Revision 1.23 by root, Thu Jun 7 10:22:55 2012 UTC

1#! perl 1#! perl
2 2
3our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", left, top'; 3#:META:X_RESOURCE:%.expr:string:background expression
4#:META:X_RESOURCE:%.enable:boolean:some boolean
5#:META:X_RESOURCE:%.extra.:value:extra config
6
7our $EXPR = 'clip move -X, -Y, load "MagnoliaAlpha.png"';
8#$EXPR = '
9# rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
10# clip X, Y, W, H, repeat_mirror,
11# load "/root/pix/das_fette_schwein.jpg"
12#';
13#$EXPR = 'solid "red"';
4#$EXPR = 'blur root, 10, 10' 14#$EXPR = 'blur root, 10, 10'
5#$EXPR = 'blur move (root, -x, -y), 5, 5' 15#$EXPR = 'blur move (root, -x, -y), 5, 5'
6#resize load "/root/pix/das_fette_schwein.jpg", w, h 16#resize load "/root/pix/das_fette_schwein.jpg", w, h
7 17
8use Safe; 18use Safe;
9 19
10our ($bgdsl_self, $old, $new); 20our ($bgdsl_self, $old, $new);
11our ($l, $t, $w, $h); 21our ($l, $t, $w, $h);
12 22
23# enforce at least this interval between updates
24our $MIN_INTERVAL = 1/100;
25
13{ 26{
14 package urxvt::bgdsl; # background language 27 package urxvt::bgdsl; # background language
15 28
16 *repeat_black = \&urxvt::RepeatNone; #TODO wtf 29# *repeat_empty = \&urxvt::RepeatNone;
17 *repeat_wrap = \&urxvt::RepeatNormal; 30# *repeat_tile = \&urxvt::RepeatNormal;
18 *repeat_pad = \&urxvt::RepeatPad; 31# *repeat_pad = \&urxvt::RepeatPad;
19 *repeat_mirror = \&urxvt::RepeatReflect; 32# *repeat_mirror = \&urxvt::RepeatReflect;
33
34=head2 PROVIDERS/GENERATORS
35
36=over 4
37
38=item load $path
39
40=cut
20 41
21 sub load($) { 42 sub load($) {
22 my ($path) = @_; 43 my ($path) = @_;
23 44
24 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path); 45 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path);
25 } 46 }
26 47
27 sub root() { 48 sub root() {
49 $new->{rootpmap_sensitive} = 1;
28 die "root op not supported, exg, we need you"; 50 die "root op not supported, exg, we need you";
29 } 51 }
30 52
53 sub solid($;$$) {
54 my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1);
55 $img->fill ($_[0]);
56 $img
57 }
58
59=back
60
61=head2 VARIABLES
62
63=over 4
64
65=cut
66
67 sub X() { $new->{position_sensitive} = 1; $l }
68 sub Y() { $new->{position_sensitive} = 1; $t }
69 sub W() { $new->{size_sensitive} = 1; $w }
70 sub H() { $new->{size_sensitive} = 1; $h }
71
72 sub now() { urxvt::NOW }
73
74 sub again($) {
75 $new->{again} = $_[0];
76 }
77
78 sub counter($) {
79 $new->{again} = $_[0];
80 $bgdsl_self->{counter} + 0
81 }
82
83=back
84
85=head2 OPERATORS
86
87=over 4
88
89=cut
90
91# sub clone($) {
92# $_[0]->clone
93# }
94
95 sub clip($;$$;$$) {
96 my $img = pop;
97 my $h = pop || H;
98 my $w = pop || W;
99 $img->sub_rect ($_[0], $_[1], $w, $h)
100 }
101
31 sub resize($$$) { 102 sub resize($$$) {
32 $_[0]->scale ($_[1], $_[2]) 103 my $img = pop;
104 $img->scale ($_[0], $_[1])
33 } 105 }
34 106
107 # TODO: ugly
35 sub move($$$) { 108 sub move($$;$) {
36 # TODO: must be simpler 109 my $img = pop->clone;
37 $_[0]->transform ($_[0]->w, $_[0]->h, $_[1], 110 $img->move ($_[0], $_[1]);
111 $img
112# my $img = pop;
113# $img->sub_rect (
114# $_[0], $_[1],
115# $img->w, $img->h,
116# $_[2],
117# )
118 }
119
120 sub rotate($$$$$$) {
121 my $img = pop;
122 $img->rotate (
38 1, 0, -$_[2], 123 $_[0],
39 0, 1, -$_[3], 124 $_[1],
40 0, 0, 1, 125 $_[2] * $img->w * .01,
126 $_[3] * $img->h * .01,
127 $_[4] * (3.14159265 / 180),
41 ) 128 )
42 } 129 }
43 130
44 sub rotate($$$$) {
45 $_[0]->rotate ($_[0], $_[1], $_[2], $_[3] * (3.14159265 / 180))
46 }
47
48 sub blur($$$) { 131 sub blur($$$) {
49 my ($img, $rh, $rv) = @_; 132 my ($rh, $rv, $img) = @_;
50 133
51 $img = $img->clone;
52 $img->clone->blur ($rh, $rv); 134 $img->blur ($rh, $rv);
53 $img
54 } 135 }
55 136
56 sub contrast($$;$$;$) { 137 sub contrast($$;$$;$) {
138 my $img = pop;
57 my ($img, $r, $g, $b, $a) = @_; 139 my ($r, $g, $b, $a) = @_;
140
58 ($g, $b) = ($r, $r) if @_ < 4; 141 ($g, $b) = ($r, $r) if @_ < 4;
59 $a = 1 if @_ < 5; 142 $a = 1 if @_ < 5;
143
60 $img = $img->clone; 144 $img = $img->clone;
61 $img->contrast ($r, $g, $b, $a); 145 $img->contrast ($r, $g, $b, $a);
62 $img 146 $img
63 } 147 }
64 148
65 sub brightness($$;$$;$) { 149 sub brightness($$;$$;$) {
150 my $img = pop;
66 my ($img, $r, $g, $b, $a) = @_; 151 my ($r, $g, $b, $a) = @_;
152
67 ($g, $b) = ($r, $r) if @_ < 4; 153 ($g, $b) = ($r, $r) if @_ < 4;
68 $a = 1 if @_ < 5; 154 $a = 1 if @_ < 5;
155
69 $img = $img->clone; 156 $img = $img->clone;
70 $img->brightness ($r, $g, $b, $a); 157 $img->brightness ($r, $g, $b, $a);
71 $img 158 $img
72 } 159 }
73 160
74 sub left () { $new->{position_sensitive} = 1; $l } 161=back
75 sub top () { $new->{position_sensitive} = 1; $t }
76 sub width () { $new->{size_sensitive} = 1; $w }
77 sub height() { $new->{size_sensitive} = 1; $h }
78 162
79 sub now() { urxvt::NOW } 163=cut
80 164
81 sub again($) {
82 $new->{again} = $_[0];
83 }
84
85 sub counter($) {
86 $new->{again} = $_[0];
87 $bgdsl_self->{counter}++ + 0
88 }
89} 165}
90 166
91sub parse_expr { 167sub parse_expr {
92 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; 168 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
93 die if $@; 169 die if $@;
… …
96 172
97# compiles a parsed expression 173# compiles a parsed expression
98sub set_expr { 174sub set_expr {
99 my ($self, $expr) = @_; 175 my ($self, $expr) = @_;
100 176
101 local $Data::Dumper::Deparse=1; use Data::Dumper; warn Dumper $expr;#d#
102 $self->{expr} = $expr; 177 $self->{expr} = $expr;
103 $self->recalculate; 178 $self->recalculate;
104} 179}
105 180
106# evaluate the current bg expression 181# evaluate the current bg expression
107sub recalculate { 182sub recalculate {
108 my ($self) = @_; 183 my ($self) = @_;
109 184
185 # rate limit evaluation
186
187 if ($self->{next_refresh} > urxvt::NOW) {
188 $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
189 $self->recalculate;
190 });
191 return;
192 }
193
194 $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
195
196 # set environment to evaluate user expression
197
110 local $bgdsl_self = $self; 198 local $bgdsl_self = $self;
111 199
112 local $old = $self->{state}; 200 local $old = $self->{state};
113 local $new = my $state = $self->{state} = {}; 201 local $new = my $state = $self->{state} = {};
114 202
115 ($l, $t, $w, $h) = 203 ($l, $t, $w, $h) =
116 $self->get_geometry; 204 $self->get_geometry;
117 205
118 warn "$l, $t";#d# 206 warn "$l,$t,$w,$h\n";#d#
207
208 # evaluate user expression
119 209
120 my $img = eval { $self->{expr}->() }; 210 my $img = eval { $self->{expr}->() };
121 warn $@ if $@;#d# 211 warn $@ if $@;#d#
212 die if !UNIVERSAL::isa $img, "urxvt::img";
213
214 # if the expression is sensitive to external events, prepare reevaluation then
122 215
123 my $repeat; 216 my $repeat;
124 217
125 if (my $again = $state->{again}) { 218 if (my $again = $state->{again}) {
126 $repeat = 1; 219 $repeat = 1;
127 $state->{again} = urxvt::timer->new->after ($again)->cb (sub { $self->recalculate }); 220 $state->{timer} = $again == $old->{again}
221 ? $old->{timer}
222 : urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
223 ++$self->{counter};
224 $self->recalculate
225 });
128 } 226 }
129 227
130 if (delete $state->{position_sensitive}) { 228 if (delete $state->{position_sensitive}) {
131 $repeat = 1; 229 $repeat = 1;
132 $self->enable (position_change => sub { $_[0]->recalculate }); 230 $self->enable (position_change => sub { $_[0]->recalculate });
… …
139 $self->enable (size_change => sub { $_[0]->recalculate }); 237 $self->enable (size_change => sub { $_[0]->recalculate });
140 } else { 238 } else {
141 $self->disable ("size_change"); 239 $self->disable ("size_change");
142 } 240 }
143 241
144 # TODO: install handlers for geometry changes &c 242 if (delete $state->{rootpmap_sensitive}) {
243 $repeat = 1;
244 $self->enable (rootpmap_change => sub { $_[0]->recalculate });
245 } else {
246 $self->disable ("rootpmap_change");
247 }
145 248
146 warn $img; 249 # clear stuff we no longer need
250
251 %$old = ();
252
253 unless ($repeat) {
254 delete $self->{state};
255 delete $self->{expr};
256 }
257
258 # prepare and set background pixmap
259
260 $img = $img->sub_rect (0, 0, $w, $h)
261 if $img->w != $w || $img->h != $h;
262
147 $self->set_background ($img); 263 $self->set_background ($img);
148 $self->scr_recolour (0); 264 $self->scr_recolour (0);
149 $self->want_refresh; 265 $self->want_refresh;
150} 266}
151 267

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