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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 1.30 by root, Thu Jun 7 13:22:06 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 $EXPR;
8#$EXPR = 'move W * 0.1, -H * 0.1, resize W * 0.5, H * 0.5, repeat_none load "opensource.png"';
9$EXPR = 'move -TX, -TY, load "argb.png"';
10#$EXPR = '
11# rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
12# clip X, Y, W, H, repeat_mirror,
13# load "/root/pix/das_fette_schwein.jpg"
14#';
15#$EXPR = 'solid "red"';
4#$EXPR = 'blur root, 10, 10' 16#$EXPR = 'blur root, 10, 10'
5#$EXPR = 'blur move (root, -x, -y), 5, 5' 17#$EXPR = 'blur move (root, -x, -y), 5, 5'
6#resize load "/root/pix/das_fette_schwein.jpg", w, h 18#resize load "/root/pix/das_fette_schwein.jpg", w, h
7 19
8use Safe; 20use Safe;
9 21
10our ($bgdsl_self, $old, $new); 22our ($bgdsl_self, $old, $new);
11our ($l, $t, $w, $h); 23our ($x, $y, $w, $h);
24
25# enforce at least this interval between updates
26our $MIN_INTERVAL = 1/100;
12 27
13{ 28{
14 package urxvt::bgdsl; # background language 29 package urxvt::bgdsl; # background language
15 30
16 *repeat_black = \&urxvt::RepeatNone; #TODO wtf 31=head2 PROVIDERS/GENERATORS
17 *repeat_wrap = \&urxvt::RepeatNormal; 32
18 *repeat_pad = \&urxvt::RepeatPad; 33=over 4
19 *repeat_mirror = \&urxvt::RepeatReflect; 34
35=item load $path
36
37Loads the image at the given C<$path>. The image is set to plane tiling
38mode.
39
40
41
42=cut
20 43
21 sub load($) { 44 sub load($) {
22 my ($path) = @_; 45 my ($path) = @_;
23 46
24 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path); 47 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path);
25 } 48 }
26 49
27 sub root() { 50 sub root() {
51 $new->{rootpmap_sensitive} = 1;
28 die "root op not supported, exg, we need you"; 52 die "root op not supported, exg, we need you";
29 } 53 }
30 54
55 sub solid($;$$) {
56 my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1);
57 $img->fill ($_[0]);
58 $img
59 }
60
61=back
62
63=head2 VARIABLES
64
65=over 4
66
67=cut
68
69 sub TX() { $new->{position_sensitive} = 1; $x }
70 sub TY() { $new->{position_sensitive} = 1; $y }
71 sub TW() { $new->{size_sensitive} = 1; $w }
72 sub TH() { $new->{size_sensitive} = 1; $h }
73
74 sub now() { urxvt::NOW }
75
76 sub again($) {
77 $new->{again} = $_[0];
78 }
79
80 sub counter($) {
81 $new->{again} = $_[0];
82 $bgdsl_self->{counter} + 0
83 }
84
85=back
86
87=head2 TILING MODES
88
89The following operators modify the tiling mode of an image, that is, the
90way that pixels outside the image area are painted when the image is used.
91
92=over 4
93
94=item tile $img
95
96Tiles the whole plane with the image and returns this new image - or in
97other words, it returns a copy of the image in plane tiling mode.
98
99=item mirror $img
100
101Similar to tile, but reflects the image each time it uses a new copy, so
102that top edges always touch top edges, right edges always touch right
103edges and so on (with normal tiling, left edges always touch right edges
104and top always touch bottom edges).
105
106=item pad $img
107
108Takes an image and modifies it so that all pixels outside the image area
109become transparent. This mode is most useful when you want to place an
110image over another image or the background colour while leaving all
111background pixels outside the image unchanged.
112
113=item extend $img
114
115Extends the image over the whole plane, using the closest pixel in the
116area outside the image. This mode is mostly useful when you more complex
117filtering operations and want the pixels outside the image to have the
118same values as the pixels near the edge.
119
120=cut
121
122 sub pad($) {
123 my $img = $_[0]->clone;
124 $img->repeat_mode (urxvt::RepeatNone);
125 $img
126 }
127
128 sub tile($) {
129 my $img = $_[0]->clone;
130 $img->repeat_mode (urxvt::RepeatNormal);
131 $img
132 }
133
134 sub mirror($) {
135 my $img = $_[0]->clone;
136 $img->repeat_mode (urxvt::RepeatReflect);
137 $img
138 }
139
140 sub extend($) {
141 my $img = $_[0]->clone;
142 $img->repeat_mode (urxvt::RepeatPad);
143 $img
144 }
145
146=back
147
148=head2 PIXEL OPERATORS
149
150The following operators modify the image pixels in various ways.
151
152=over 4
153
154=item clone $img
155
156Returns an exact copy of the image.
157
158=cut
159
160 sub clone($) {
161 $_[0]->clone
162 }
163
164=item clip $img
165
166=item clip $width, $height, $img
167
168=item clip $x, $y, $width, $height, $img
169
170Clips an image to the given rectangle. If the rectangle is outside the
171image area (e.g. when C<$x> or C<$y> are negative) or the rectangle is
172larger than the image, then the tiling mode defines how the extra pixels
173will be filled.
174
175If C<$x> an C<$y> are missing, then C<0> is assumed for both.
176
177If C<$width> and C<$height> are missing, then the window size will be
178assumed.
179
180Example: load an image, blur it, and clip it to the window size to save
181memory.
182
183 clip blur 10, load "mybg.png"
184
185=cut
186
187 sub clip($;$$;$$) {
188 my $img = pop;
189 my $h = pop || TH;
190 my $w = pop || TW;
191 $img->sub_rect ($_[0], $_[1], $w, $h)
192 }
193
194=item scale $img
195
196=item scale $size_percent, $img
197
198=item scale $width_percent, $height_percent, $img
199
200Scales the image by the given percentages in horizontal
201(C<$width_percent>) and vertical (C<$height_percent>) direction.
202
203If only one percentage is give, it is used for both directions.
204
205If no percentages are given, scales the image to the window size without
206keeping aspect.
207
208=item resize $width, $height, $img
209
210Resizes the image to exactly C<$width> times C<$height> pixels.
211
212=cut
213
214#TODO: maximise, maximise_fill?
215
216 sub scale($$$) {
217 my $img = pop;
218
219 @_ == 2 ? $img->scale ($_[0] * $img->w * 0.01, $_[1] * $img->h * 0.01)
220 : @_ ? $img->scale ($_[0] * $img->w * 0.01, $_[0] * $img->h * 0.01)
221 : $img->scale (TW, TH)
222 }
223
31 sub resize($$$) { 224 sub resize($$$) {
32 $_[0]->scale ($_[1], $_[2]) 225 my $img = pop;
226 $img->scale ($_[0], $_[1])
33 } 227 }
34 228
35 sub move($$$) { 229 sub move($$;$) {
36 # TODO: must be simpler 230 my $img = pop->clone;
37 $_[0]->transform ($_[0]->w, $_[0]->h, $_[1], 231 $img->move ($_[0], $_[1]);
232 $img
233 }
234
235 sub rotate($$$$$$) {
236 my $img = pop;
237 $img->rotate (
38 1, 0, -$_[2], 238 $_[0],
39 0, 1, -$_[3], 239 $_[1],
40 0, 0, 1, 240 $_[2] * $img->w * .01,
241 $_[3] * $img->h * .01,
242 $_[4] * (3.14159265 / 180),
41 ) 243 )
42 } 244 }
43 245
44 sub rotate($$$$) {
45 $_[0]->rotate ($_[0], $_[1], $_[2], $_[3] * (3.14159265 / 180))
46 }
47
48 sub blur($$$) { 246 sub blur($$;$) {
49 my ($img, $rh, $rv) = @_; 247 my $img = pop;
50 248 $img->blur ($_[0], @_ >= 2 ? $_[1] : $_[0])
51 $img = $img->clone;
52 $img->clone->blur ($rh, $rv);
53 $img
54 } 249 }
55 250
56 sub contrast($$;$$;$) { 251 sub contrast($$;$$;$) {
252 my $img = pop;
57 my ($img, $r, $g, $b, $a) = @_; 253 my ($r, $g, $b, $a) = @_;
254
58 ($g, $b) = ($r, $r) if @_ < 4; 255 ($g, $b) = ($r, $r) if @_ < 4;
59 $a = 1 if @_ < 5; 256 $a = 1 if @_ < 5;
257
60 $img = $img->clone; 258 $img = $img->clone;
61 $img->contrast ($r, $g, $b, $a); 259 $img->contrast ($r, $g, $b, $a);
62 $img 260 $img
63 } 261 }
64 262
65 sub brightness($$;$$;$) { 263 sub brightness($$;$$;$) {
264 my $img = pop;
66 my ($img, $r, $g, $b, $a) = @_; 265 my ($r, $g, $b, $a) = @_;
266
67 ($g, $b) = ($r, $r) if @_ < 4; 267 ($g, $b) = ($r, $r) if @_ < 4;
68 $a = 1 if @_ < 5; 268 $a = 1 if @_ < 5;
269
69 $img = $img->clone; 270 $img = $img->clone;
70 $img->brightness ($r, $g, $b, $a); 271 $img->brightness ($r, $g, $b, $a);
71 $img 272 $img
72 } 273 }
73 274
74 sub left () { $new->{position_sensitive} = 1; $l } 275=back
75 sub top () { $new->{position_sensitive} = 1; $t }
76 sub width () { $new->{size_sensitive} = 1; $w }
77 sub height() { $new->{size_sensitive} = 1; $h }
78 276
79 sub now() { urxvt::NOW } 277=cut
80 278
81 sub again($) {
82 $new->{again} = $_[0];
83 }
84
85 sub counter($) {
86 $new->{again} = $_[0];
87 $bgdsl_self->{counter}++ + 0
88 }
89} 279}
90 280
91sub parse_expr { 281sub parse_expr {
92 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; 282 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
93 die if $@; 283 die if $@;
… …
96 286
97# compiles a parsed expression 287# compiles a parsed expression
98sub set_expr { 288sub set_expr {
99 my ($self, $expr) = @_; 289 my ($self, $expr) = @_;
100 290
101 local $Data::Dumper::Deparse=1; use Data::Dumper; warn Dumper $expr;#d#
102 $self->{expr} = $expr; 291 $self->{expr} = $expr;
103 $self->recalculate; 292 $self->recalculate;
104} 293}
105 294
106# evaluate the current bg expression 295# evaluate the current bg expression
107sub recalculate { 296sub recalculate {
108 my ($self) = @_; 297 my ($self) = @_;
109 298
299 # rate limit evaluation
300
301 if ($self->{next_refresh} > urxvt::NOW) {
302 $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
303 $self->recalculate;
304 });
305 return;
306 }
307
308 $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
309
310 # set environment to evaluate user expression
311
110 local $bgdsl_self = $self; 312 local $bgdsl_self = $self;
111 313
112 local $old = $self->{state}; 314 local $old = $self->{state};
113 local $new = my $state = $self->{state} = {}; 315 local $new = my $state = $self->{state} = {};
114 316
317 my $border = 0; #d#
318
115 ($l, $t, $w, $h) = 319 ($x, $y, $w, $h) =
116 $self->get_geometry; 320 $self->background_geometry ($border);
117 321
118 warn "$l, $t";#d# 322 # evaluate user expression
119 323
120 my $img = eval { $self->{expr}->() }; 324 my $img = eval { $self->{expr}->() };
121 warn $@ if $@;#d# 325 warn $@ if $@;#d#
326 die if !UNIVERSAL::isa $img, "urxvt::img";
327
328 # if the expression is sensitive to external events, prepare reevaluation then
122 329
123 my $repeat; 330 my $repeat;
124 331
125 if (my $again = $state->{again}) { 332 if (my $again = $state->{again}) {
126 $repeat = 1; 333 $repeat = 1;
127 $state->{again} = urxvt::timer->new->after ($again)->cb (sub { $self->recalculate }); 334 $state->{timer} = $again == $old->{again}
335 ? $old->{timer}
336 : urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
337 ++$self->{counter};
338 $self->recalculate
339 });
128 } 340 }
129 341
130 if (delete $state->{position_sensitive}) { 342 if (delete $state->{position_sensitive}) {
131 $repeat = 1; 343 $repeat = 1;
132 $self->enable (position_change => sub { $_[0]->recalculate }); 344 $self->enable (position_change => sub { $_[0]->recalculate });
… …
139 $self->enable (size_change => sub { $_[0]->recalculate }); 351 $self->enable (size_change => sub { $_[0]->recalculate });
140 } else { 352 } else {
141 $self->disable ("size_change"); 353 $self->disable ("size_change");
142 } 354 }
143 355
144 # TODO: install handlers for geometry changes &c 356 if (delete $state->{rootpmap_sensitive}) {
357 $repeat = 1;
358 $self->enable (rootpmap_change => sub { $_[0]->recalculate });
359 } else {
360 $self->disable ("rootpmap_change");
361 }
145 362
146 warn $img; 363 # clear stuff we no longer need
364
365 %$old = ();
366
367 unless ($repeat) {
368 delete $self->{state};
369 delete $self->{expr};
370 }
371
372 # prepare and set background pixmap
373
374 $img = $img->sub_rect (0, 0, $w, $h)
375 if $img->w != $w || $img->h != $h;
376
147 $self->set_background ($img); 377 $self->set_background ($img, $border);
148 $self->scr_recolour (0); 378 $self->scr_recolour (0);
149 $self->want_refresh; 379 $self->want_refresh;
150} 380}
151 381
152sub on_start { 382sub on_start {

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