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Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.5 by root, Tue Jun 5 13:42:59 2012 UTC vs.
Revision 1.16 by root, Wed Jun 6 11:46:11 2012 UTC

1#! perl 1#! perl
2 2
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
3our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y'; 7our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
4$EXPR = 'rotate load "/root/pix/das_fette_schwein.jpg", W, H, 50, 50, counter 1/60, repeat_mirror'; 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"';
5#$EXPR = 'blur root, 10, 10' 14#$EXPR = 'blur root, 10, 10'
6#$EXPR = 'blur move (root, -x, -y), 5, 5' 15#$EXPR = 'blur move (root, -x, -y), 5, 5'
7#resize load "/root/pix/das_fette_schwein.jpg", w, h 16#resize load "/root/pix/das_fette_schwein.jpg", w, h
8 17
9use Safe; 18use Safe;
10 19
11our ($bgdsl_self, $old, $new); 20our ($bgdsl_self, $old, $new);
12our ($l, $t, $w, $h); 21our ($l, $t, $w, $h);
22
23# enforce at least this interval between updates
24our $MIN_INTERVAL = 1/100;
13 25
14{ 26{
15 package urxvt::bgdsl; # background language 27 package urxvt::bgdsl; # background language
16 28
17 *repeat_black = \&urxvt::RepeatNone; #TODO wtf 29 *repeat_black = \&urxvt::RepeatNone; #TODO wtf
18 *repeat_wrap = \&urxvt::RepeatNormal; 30 *repeat_wrap = \&urxvt::RepeatNormal;
19 *repeat_pad = \&urxvt::RepeatPad; 31 *repeat_pad = \&urxvt::RepeatPad;
20 *repeat_mirror = \&urxvt::RepeatReflect; 32 *repeat_mirror = \&urxvt::RepeatReflect;
21 33
34=head2 PROVIDERS/GENERATORS
35
36=over 4
37
38=item load $path
39
40=cut
41
22 sub load($) { 42 sub load($) {
23 my ($path) = @_; 43 my ($path) = @_;
24 44
25 $new->{load}{$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);
26 } 46 }
27 47
28 sub root() { 48 sub root() {
49 $new->{rootpmap_sensitive} = 1;
29 die "root op not supported, exg, we need you"; 50 die "root op not supported, exg, we need you";
30 } 51 }
52
53 sub solid($;$$) {
54 my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1);
55 $img->fill ($_[0]);
56 $img
57 }
58
59=back
60
61=head2 OPERATORS
62
63=over 4
64
65=cut
31 66
32# sub clone($) { 67# sub clone($) {
33# $_[0]->clone 68# $_[0]->clone
34# } 69# }
35 70
36 sub subrect($$$$$;$) { 71 sub clip($$$$$;$) {
72 my $img = pop;
37 $_[0]->sub_rect ($_[1], $_[2], $_[3], $_[4], $_[5]) 73 $img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
38 } 74 }
39 75
40 sub resize($$$) { 76 sub resize($$$) {
41 $_[0]->scale ($_[1], $_[2]) 77 my $img = pop;
78 $img->scale ($_[0], $_[1])
42 } 79 }
43 80
81 # TODO: ugly
44 sub move($$$;$) { 82 sub move($$;$) {
45 # TODO: must be simpler 83 my $img = pop;
46 $_[0]->transform ($_[0]->w, $_[0]->h, 84 $img->sub_rect (
47 1, 0, $_[1], 85 $_[0], $_[1],
48 0, 1, $_[2], 86 $img->w, $img->h,
49 0, 0, 1,
50 $_[3], 87 $_[2],
51 ) 88 )
52 } 89 }
53 90
54 sub rotate($$$$$$;$) { 91 sub rotate($$$$$$;$) {
92 my $img = pop;
55 $_[0]->rotate ( 93 $img->rotate (
94 $_[0],
56 $_[1], 95 $_[1],
57 $_[2],
58 $_[3] * $_[0]->w * .01, 96 $_[2] * $img->w * .01,
59 $_[4] * $_[0]->h * .01, 97 $_[3] * $img->h * .01,
60 $_[5] * (3.14159265 / 180), 98 $_[4] * (3.14159265 / 180),
61 $_[6], 99 $_[5],
62 ) 100 )
63 } 101 }
64 102
65 sub blur($$$) { 103 sub blur($$$) {
66 my ($img, $rh, $rv) = @_; 104 my ($rh, $rv, $img) = @_;
67 105
68 $img = $img->clone;
69 $img->blur ($rh, $rv); 106 $img->blur ($rh, $rv);
70 $img
71 } 107 }
72 108
73 sub contrast($$;$$;$) { 109 sub contrast($$;$$;$) {
110 my $img = pop;
74 my ($img, $r, $g, $b, $a) = @_; 111 my ($r, $g, $b, $a) = @_;
75 112
76 ($g, $b) = ($r, $r) if @_ < 4; 113 ($g, $b) = ($r, $r) if @_ < 4;
77 $a = 1 if @_ < 5; 114 $a = 1 if @_ < 5;
78 115
79 $img = $img->clone; 116 $img = $img->clone;
80 $img->contrast ($r, $g, $b, $a); 117 $img->contrast ($r, $g, $b, $a);
81 $img 118 $img
82 } 119 }
83 120
84 sub brightness($$;$$;$) { 121 sub brightness($$;$$;$) {
122 my $img = pop;
85 my ($img, $r, $g, $b, $a) = @_; 123 my ($r, $g, $b, $a) = @_;
86 124
87 ($g, $b) = ($r, $r) if @_ < 4; 125 ($g, $b) = ($r, $r) if @_ < 4;
88 $a = 1 if @_ < 5; 126 $a = 1 if @_ < 5;
89 127
90 $img = $img->clone; 128 $img = $img->clone;
… …
103 $new->{again} = $_[0]; 141 $new->{again} = $_[0];
104 } 142 }
105 143
106 sub counter($) { 144 sub counter($) {
107 $new->{again} = $_[0]; 145 $new->{again} = $_[0];
108 $bgdsl_self->{counter}++ + 0 146 $bgdsl_self->{counter} + 0
109 } 147 }
148
149=back
150
151=cut
152
110} 153}
111 154
112sub parse_expr { 155sub parse_expr {
113 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; 156 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
114 die if $@; 157 die if $@;
… …
125 168
126# evaluate the current bg expression 169# evaluate the current bg expression
127sub recalculate { 170sub recalculate {
128 my ($self) = @_; 171 my ($self) = @_;
129 172
173 # rate limit evaluation
174
175 if ($self->{next_refresh} > urxvt::NOW) {
176 $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
177 $self->recalculate;
178 });
179 return;
180 }
181
182 $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
183
184 # set environment to evaluate user expression
185
130 local $bgdsl_self = $self; 186 local $bgdsl_self = $self;
131 187
132 local $old = $self->{state}; 188 local $old = $self->{state};
133 local $new = my $state = $self->{state} = {}; 189 local $new = my $state = $self->{state} = {};
134 190
135 ($l, $t, $w, $h) = 191 ($l, $t, $w, $h) =
136 $self->get_geometry; 192 $self->get_geometry;
137 193
194 # evaluate user expression
195
138 my $img = eval { $self->{expr}->() }; 196 my $img = eval { $self->{expr}->() };
139 warn $@ if $@;#d# 197 warn $@ if $@;#d#
198 die if !UNIVERSAL::isa $img, "urxvt::img";
140 199
141 %$old = (); 200 # if the expression is sensitive to external events, prepare reevaluation then
142 201
143 my $repeat; 202 my $repeat;
144 203
145 if (my $again = $state->{again}) { 204 if (my $again = $state->{again}) {
146 $repeat = 1; 205 $repeat = 1;
147 $state->{again} = urxvt::timer->new->after ($again)->cb (sub { $self->recalculate }); 206 $state->{timer} = $again == $old->{again}
207 ? $old->{timer}
208 : urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
209 ++$self->{counter};
210 $self->recalculate
211 });
148 } 212 }
149 213
150 if (delete $state->{position_sensitive}) { 214 if (delete $state->{position_sensitive}) {
151 $repeat = 1; 215 $repeat = 1;
152 $self->enable (position_change => sub { $_[0]->recalculate }); 216 $self->enable (position_change => sub { $_[0]->recalculate });
… …
159 $self->enable (size_change => sub { $_[0]->recalculate }); 223 $self->enable (size_change => sub { $_[0]->recalculate });
160 } else { 224 } else {
161 $self->disable ("size_change"); 225 $self->disable ("size_change");
162 } 226 }
163 227
228 if (delete $state->{rootpmap_sensitive}) {
229 $repeat = 1;
230 $self->enable (rootpmap_change => sub { $_[0]->recalculate });
231 } else {
232 $self->disable ("rootpmap_change");
233 }
234
235 # clear stuff we no longer need
236
237 %$old = ();
238
164 unless ($repeat) { 239 unless ($repeat) {
165 delete $self->{state}; 240 delete $self->{state};
166 delete $self->{expr}; 241 delete $self->{expr};
167 } 242 }
168 243
244 # prepare and set background pixmap
245
169 $img = $img->sub_rect (0, 0, $w, $h) 246 $img = $img->sub_rect (0, 0, $w, $h)
170 if $img->w != $w || $img->h != $h; 247 if $img->w != $w || $img->h != $h;
171 248
172 $self->set_background ($img); 249 $self->set_background ($img);
173 $self->scr_recolour (0); 250 $self->scr_recolour (0);
… …
175} 252}
176 253
177sub on_start { 254sub on_start {
178 my ($self) = @_; 255 my ($self) = @_;
179 256
257 warn $self->x_resource ("background.enable");
258
180 $self->set_expr (parse_expr $EXPR); 259 $self->set_expr (parse_expr $EXPR);
181 260
182 () 261 ()
183} 262}
184 263

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