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/cvs/rxvt-unicode/src/perl/background
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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 1.13 by root, Tue Jun 5 19:32:29 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:$$:string:background expression
4
5our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
6$EXPR = '
7 rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
8 clip X, Y, W, H, repeat_mirror,
9 load "/root/pix/das_fette_schwein.jpg"
10';
4#$EXPR = 'blur root, 10, 10' 11#$EXPR = 'blur root, 10, 10'
5#$EXPR = 'blur move (root, -x, -y), 5, 5' 12#$EXPR = 'blur move (root, -x, -y), 5, 5'
6#resize load "/root/pix/das_fette_schwein.jpg", w, h 13#resize load "/root/pix/das_fette_schwein.jpg", w, h
7 14
8use Safe; 15use Safe;
9 16
17our ($bgdsl_self, $old, $new);
18our ($l, $t, $w, $h);
19
20# enforce at leats this time between updates
21our $MIN_INTERVAL = 1/100;
22
10{ 23{
11 package urxvt::bgdsl::vars;
12
13 our ($self, $old, $new);
14 our ($x, $y, $w, $h);
15
16 package urxvt::bgdsl; # background language 24 package urxvt::bgdsl; # background language
17 25
18 *repeat_black = \&urxvt::RepeatNone; #TODO wtf 26 *repeat_black = \&urxvt::RepeatNone; #TODO wtf
19 *repeat_wrap = \&urxvt::RepeatNormal; 27 *repeat_wrap = \&urxvt::RepeatNormal;
20 *repeat_pad = \&urxvt::RepeatPad; 28 *repeat_pad = \&urxvt::RepeatPad;
21 *repeat_mirror = \&urxvt::RepeatReflect; 29 *repeat_mirror = \&urxvt::RepeatReflect;
22 30
23 sub load { 31 sub load($) {
24 my ($path) = @_; 32 my ($path) = @_;
25 33
26 $new->{load}{$path} = $old->{load}{$path} || $self->new_img_from_file ($path); 34 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path);
27 } 35 }
28 36
29 sub root { 37 sub root() {
38 $new->{rootpmap_sensitive} = 1;
30 die "root op not supported, exg, we need you"; 39 die "root op not supported, exg, we need you";
31 } 40 }
32 41
33 sub resize { 42# sub clone($) {
34 $_[0]->scale ($_[1], $_[2]) 43# $_[0]->clone
35 } 44# }
36 45
46 sub clip($$$$$;$) {
47 my $img = pop;
48 $img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
49 }
50
51 sub resize($$$) {
52 my $img = pop;
53 $img->scale ($_[0], $_[1])
54 }
55
56 # TODO: ugly
37 sub move { 57 sub move($$;$) {
38 # TODO: must be simpler 58 my $img = pop;
39 $_[0]->transform ($_[0]->w, $_[0]->h, $_[1], 59 $img->sub_rect (
60 $_[0], $_[1],
61 $img->w, $img->h,
40 1, 0, -$_[2], 62 $_[2],
41 0, 1, -$_[3],
42 0, 0, 1,
43 ) 63 )
44 } 64 }
45 65
46 sub rotate { 66 sub rotate($$$$$$;$) {
47 $_[0]->rotate ($_[0], $_[1], $_[2], $_[3] * (3.14159265 / 180)) 67 my $img = pop;
68 $img->rotate (
69 $_[0],
70 $_[1],
71 $_[2] * $img->w * .01,
72 $_[3] * $img->h * .01,
73 $_[4] * (3.14159265 / 180),
74 $_[5],
75 )
48 } 76 }
49 77
50 sub blur { 78 sub blur($$$) {
51 my ($img, $rh, $rv) = @_; 79 my ($rh, $rv, $img) = @_;
52 80
53 $img = $img->clone;
54 $img->clone->blur ($rh, $rv); 81 $img->blur ($rh, $rv);
55 $img
56 } 82 }
57 83
58 sub contrast { 84 sub contrast($$;$$;$) {
85 my $img = pop;
59 my ($img, $r, $g, $b, $a) = @_; 86 my ($r, $g, $b, $a) = @_;
87
60 ($g, $b) = ($r, $r) if @_ < 4; 88 ($g, $b) = ($r, $r) if @_ < 4;
61 $a = 1 if @_ < 5; 89 $a = 1 if @_ < 5;
90
62 $img = $img->clone; 91 $img = $img->clone;
63 $img->contrast ($r, $g, $b, $a); 92 $img->contrast ($r, $g, $b, $a);
64 $img 93 $img
65 } 94 }
66 95
67 sub brightness { 96 sub brightness($$;$$;$) {
97 my $img = pop;
68 my ($img, $r, $g, $b, $a) = @_; 98 my ($r, $g, $b, $a) = @_;
99
69 ($g, $b) = ($r, $r) if @_ < 4; 100 ($g, $b) = ($r, $r) if @_ < 4;
70 $a = 1 if @_ < 5; 101 $a = 1 if @_ < 5;
102
71 $img = $img->clone; 103 $img = $img->clone;
72 $img->brightness ($r, $g, $b, $a); 104 $img->brightness ($r, $g, $b, $a);
73 $img 105 $img
74 } 106 }
75 107
76 sub x { $new->{position_sensitive} = 1; $x } 108 sub X() { $new->{position_sensitive} = 1; $l }
77 sub y { $new->{position_sensitive} = 1; $y } 109 sub Y() { $new->{position_sensitive} = 1; $t }
78 sub w { $new->{size_sensitive} = 1; $w } 110 sub W() { $new->{size_sensitive} = 1; $w }
79 sub h { $new->{size_sensitive} = 1; $h } 111 sub H() { $new->{size_sensitive} = 1; $h }
112
80 sub now { urxvt::NOW } 113 sub now() { urxvt::NOW }
81 114
82 sub again { 115 sub again($) {
83 $new->{again} = $_[0]; 116 $new->{again} = $_[0];
84 } 117 }
85 118
86 sub counter { 119 sub counter($) {
87 $new->{again} = $_[0]; 120 $new->{again} = $_[0];
88 $self->{counter}++ + 0 121 $bgdsl_self->{counter} + 0
89 } 122 }
90} 123}
91 124
92sub parse_expr { 125sub parse_expr {
93 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; 126 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
… …
97 130
98# compiles a parsed expression 131# compiles a parsed expression
99sub set_expr { 132sub set_expr {
100 my ($self, $expr) = @_; 133 my ($self, $expr) = @_;
101 134
102 local $Data::Dumper::Deparse=1; use Data::Dumper; warn Dumper $expr;#d#
103 $self->{expr} = $expr; 135 $self->{expr} = $expr;
104 $self->recalculate; 136 $self->recalculate;
105} 137}
106 138
107# evaluate the current bg expression 139# evaluate the current bg expression
108sub recalculate { 140sub recalculate {
109 my ($self) = @_; 141 my ($self) = @_;
110 142
143 # rate limit evaluation
144
145 if ($self->{next_refresh} > urxvt::NOW) {
146 $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
147 $self->recalculate;
148 });
149 return;
150 }
151
152 $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
153
154 # set environment to evaluate user expression
155
111 local $urxvt::bgdsl::vars::self = $self; 156 local $bgdsl_self = $self;
112 157
113 local $urxvt::bgdsl::vars::old = $self->{state}; 158 local $old = $self->{state};
114 local $urxvt::bgdsl::vars::new = my $state = $self->{state} = {}; 159 local $new = my $state = $self->{state} = {};
115 160
116 ($urxvt::bgdsl::vars::x, $urxvt::bgdsl::vars::y, $urxvt::bgdsl::vars::w, $urxvt::bgdsl::vars::h) = 161 ($l, $t, $w, $h) =
117 $self->get_geometry; 162 $self->get_geometry;
163
164 # evaluate user expression
118 165
119 my $img = eval { $self->{expr}->() }; 166 my $img = eval { $self->{expr}->() };
120 warn $@ if $@;#d# 167 warn $@ if $@;#d#
121 168
169 # if the expression is sensitive to external events, prepare reevaluation then
170
171 my $repeat;
172
122 if (my $again = $state->{again}) { 173 if (my $again = $state->{again}) {
123 warn $again;#d# 174 $repeat = 1;
124 $state->{again} = urxvt::timer->new->after ($again)->cb (sub { $self->recalculate }); 175 $state->{timer} = $again == $old->{again}
176 ? $old->{timer}
177 : urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
178 ++$self->{counter};
179 $self->recalculate
180 });
125 } 181 }
126 182
127 # TODO: install handlers for geometry changes &c 183 if (delete $state->{position_sensitive}) {
184 $repeat = 1;
185 $self->enable (position_change => sub { $_[0]->recalculate });
186 } else {
187 $self->disable ("position_change");
188 }
128 189
129 warn $img; 190 if (delete $state->{size_sensitive}) {
191 $repeat = 1;
192 $self->enable (size_change => sub { $_[0]->recalculate });
193 } else {
194 $self->disable ("size_change");
195 }
196
197 if (delete $state->{rootpmap_sensitive}) {
198 $repeat = 1;
199 $self->enable (rootpmap_change => sub { $_[0]->recalculate });
200 } else {
201 $self->disable ("rootpmap_change");
202 }
203
204 # clear stuff we no longer need
205
206 %$old = ();
207
208 unless ($repeat) {
209 delete $self->{state};
210 delete $self->{expr};
211 }
212
213 # prepare and set background pixmap
214
215 $img = $img->sub_rect (0, 0, $w, $h)
216 if $img->w != $w || $img->h != $h;
217
130 $self->set_background ($img); 218 $self->set_background ($img);
131 $self->scr_recolour (0); 219 $self->scr_recolour (0);
132 $self->want_refresh; 220 $self->want_refresh;
133} 221}
134 222

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