1 |
root |
1.1 |
#! perl |
2 |
|
|
|
3 |
root |
1.16 |
#:META:X_RESOURCE:%.expr:string:background expression |
4 |
root |
1.33 |
#:META:X_RESOURCE:%.border.:boolean:respect the terminal border |
5 |
|
|
|
6 |
|
|
=head1 background - manage terminal background |
7 |
|
|
|
8 |
|
|
=head2 SYNOPSIS |
9 |
|
|
|
10 |
|
|
rxvt -background-expr 'background expression' |
11 |
|
|
-background-border |
12 |
|
|
|
13 |
|
|
=head2 DESCRIPTION |
14 |
|
|
|
15 |
|
|
=head2 REFERENCE |
16 |
|
|
|
17 |
|
|
=cut |
18 |
root |
1.12 |
|
19 |
root |
1.28 |
our $EXPR; |
20 |
|
|
#$EXPR = 'move W * 0.1, -H * 0.1, resize W * 0.5, H * 0.5, repeat_none load "opensource.png"'; |
21 |
root |
1.30 |
$EXPR = 'move -TX, -TY, load "argb.png"'; |
22 |
root |
1.19 |
#$EXPR = ' |
23 |
|
|
# rotate W, H, 50, 50, counter 1/59.95, repeat_mirror, |
24 |
|
|
# clip X, Y, W, H, repeat_mirror, |
25 |
|
|
# load "/root/pix/das_fette_schwein.jpg" |
26 |
|
|
#'; |
27 |
|
|
#$EXPR = 'solid "red"'; |
28 |
root |
1.1 |
#$EXPR = 'blur root, 10, 10' |
29 |
|
|
#$EXPR = 'blur move (root, -x, -y), 5, 5' |
30 |
|
|
#resize load "/root/pix/das_fette_schwein.jpg", w, h |
31 |
|
|
|
32 |
root |
1.33 |
our ($self, $old, $new); |
33 |
root |
1.29 |
our ($x, $y, $w, $h); |
34 |
root |
1.3 |
|
35 |
root |
1.16 |
# enforce at least this interval between updates |
36 |
root |
1.10 |
our $MIN_INTERVAL = 1/100; |
37 |
root |
1.9 |
|
38 |
root |
1.1 |
{ |
39 |
|
|
package urxvt::bgdsl; # background language |
40 |
|
|
|
41 |
root |
1.15 |
=head2 PROVIDERS/GENERATORS |
42 |
|
|
|
43 |
root |
1.31 |
These functions provide an image, by loading it from disk, grabbing it |
44 |
sf-exg |
1.32 |
from the root screen or by simply generating it. They are used as starting |
45 |
root |
1.31 |
points to get an image you can play with. |
46 |
|
|
|
47 |
root |
1.15 |
=over 4 |
48 |
|
|
|
49 |
|
|
=item load $path |
50 |
|
|
|
51 |
root |
1.29 |
Loads the image at the given C<$path>. The image is set to plane tiling |
52 |
|
|
mode. |
53 |
|
|
|
54 |
root |
1.31 |
Loaded images will be cached for one cycle. |
55 |
root |
1.29 |
|
56 |
root |
1.15 |
=cut |
57 |
|
|
|
58 |
root |
1.2 |
sub load($) { |
59 |
root |
1.1 |
my ($path) = @_; |
60 |
|
|
|
61 |
root |
1.33 |
$new->{load}{$path} = $old->{load}{$path} || $self->new_img_from_file ($path); |
62 |
root |
1.1 |
} |
63 |
|
|
|
64 |
root |
1.31 |
=item root |
65 |
|
|
|
66 |
|
|
Returns the root window pixmap, that is, hopefully, the background image |
67 |
|
|
of your screen. The image is set to extend mode. |
68 |
|
|
|
69 |
|
|
This function makes your expression root sensitive, that means it will be |
70 |
|
|
reevaluated when the bg image changes. |
71 |
|
|
|
72 |
|
|
=cut |
73 |
|
|
|
74 |
root |
1.2 |
sub root() { |
75 |
root |
1.9 |
$new->{rootpmap_sensitive} = 1; |
76 |
root |
1.1 |
die "root op not supported, exg, we need you"; |
77 |
|
|
} |
78 |
|
|
|
79 |
root |
1.31 |
=item solid $colour |
80 |
|
|
|
81 |
|
|
=item solid $width, $height, $colour |
82 |
|
|
|
83 |
|
|
Creates a new image and completely fills it with the given colour. The |
84 |
|
|
image is set to tiling mode. |
85 |
|
|
|
86 |
|
|
If <$width> and C<$height> are omitted, it creates a 1x1 image, which is |
87 |
|
|
useful for solid backgrounds or for use in filtering effects. |
88 |
|
|
|
89 |
|
|
=cut |
90 |
|
|
|
91 |
|
|
sub solid($$;$) { |
92 |
|
|
my $colour = pop; |
93 |
|
|
|
94 |
root |
1.33 |
my $img = $self->new_img (urxvt::PictStandardARGB32, $_[0] || 1, $_[1] || 1); |
95 |
root |
1.31 |
$img->fill ($colour); |
96 |
root |
1.15 |
$img |
97 |
|
|
} |
98 |
|
|
|
99 |
|
|
=back |
100 |
|
|
|
101 |
root |
1.20 |
=head2 VARIABLES |
102 |
|
|
|
103 |
root |
1.31 |
The following functions provide variable data such as the terminal |
104 |
sf-exg |
1.32 |
window dimensions. Most of them make your expression sensitive to some |
105 |
root |
1.31 |
events, for example using C<TW> (terminal width) means your expression is |
106 |
|
|
evaluated again when the terminal is resized. |
107 |
|
|
|
108 |
root |
1.20 |
=over 4 |
109 |
|
|
|
110 |
root |
1.31 |
=item TX |
111 |
|
|
|
112 |
|
|
=item TY |
113 |
|
|
|
114 |
|
|
Return the X and Y coordinates of the terminal window (the terminal |
115 |
|
|
window is the full window by default, and the character area only when in |
116 |
|
|
border-respect mode). |
117 |
|
|
|
118 |
|
|
Using these functions make your expression sensitive to window moves. |
119 |
|
|
|
120 |
|
|
These functions are mainly useful to align images to the root window. |
121 |
|
|
|
122 |
|
|
Example: load an image and align it so it looks as if anchored to the |
123 |
|
|
background. |
124 |
|
|
|
125 |
|
|
move -TX, -TY, load "mybg.png" |
126 |
|
|
|
127 |
|
|
=item TW |
128 |
|
|
|
129 |
|
|
Return the width (C<TW>) and height (C<TH>) of the terminal window (the |
130 |
|
|
terminal window is the full window by default, and the character area only |
131 |
|
|
when in border-respect mode). |
132 |
|
|
|
133 |
|
|
Using these functions make your expression sensitive to window resizes. |
134 |
|
|
|
135 |
|
|
These functions are mainly useful to scale images, or to clip images to |
136 |
|
|
the window size to conserve memory. |
137 |
|
|
|
138 |
|
|
Example: take the screen background, clip it to the window size, blur it a |
139 |
|
|
bit, align it to the window position and use it as background. |
140 |
|
|
|
141 |
|
|
clip move -TX, -TY, blur 5, root |
142 |
|
|
|
143 |
root |
1.20 |
=cut |
144 |
|
|
|
145 |
root |
1.30 |
sub TX() { $new->{position_sensitive} = 1; $x } |
146 |
|
|
sub TY() { $new->{position_sensitive} = 1; $y } |
147 |
|
|
sub TW() { $new->{size_sensitive} = 1; $w } |
148 |
|
|
sub TH() { $new->{size_sensitive} = 1; $h } |
149 |
root |
1.20 |
|
150 |
root |
1.33 |
=item now |
151 |
|
|
|
152 |
|
|
Returns the current time as (fractional) seconds since the epoch. |
153 |
|
|
|
154 |
|
|
Using this expression does I<not> make your expression sensitive to time, |
155 |
|
|
but the next two functions do. |
156 |
|
|
|
157 |
|
|
=item again $seconds |
158 |
|
|
|
159 |
|
|
When this function is used the expression will be reevaluated again in |
160 |
|
|
C<$seconds> seconds. |
161 |
|
|
|
162 |
|
|
Example: load some image and rotate it according to the time of day (as if it were |
163 |
|
|
the hour pointer of a clock). update this image every minute. |
164 |
|
|
|
165 |
|
|
again 60; rotate TW, TH, 50, 50, (now % 86400) * -720 / 86400, scale load "myclock.png" |
166 |
|
|
|
167 |
|
|
=item counter $seconds |
168 |
|
|
|
169 |
|
|
Like C<again>, but also returns an increasing counter value, starting at |
170 |
|
|
0, which might be useful for some simple animation effects. |
171 |
|
|
|
172 |
|
|
=cut |
173 |
|
|
|
174 |
root |
1.20 |
sub now() { urxvt::NOW } |
175 |
|
|
|
176 |
|
|
sub again($) { |
177 |
|
|
$new->{again} = $_[0]; |
178 |
|
|
} |
179 |
|
|
|
180 |
|
|
sub counter($) { |
181 |
|
|
$new->{again} = $_[0]; |
182 |
root |
1.33 |
$self->{counter} + 0 |
183 |
root |
1.20 |
} |
184 |
|
|
|
185 |
|
|
=back |
186 |
|
|
|
187 |
root |
1.28 |
=head2 TILING MODES |
188 |
|
|
|
189 |
|
|
The following operators modify the tiling mode of an image, that is, the |
190 |
|
|
way that pixels outside the image area are painted when the image is used. |
191 |
root |
1.15 |
|
192 |
|
|
=over 4 |
193 |
|
|
|
194 |
root |
1.28 |
=item tile $img |
195 |
|
|
|
196 |
|
|
Tiles the whole plane with the image and returns this new image - or in |
197 |
|
|
other words, it returns a copy of the image in plane tiling mode. |
198 |
|
|
|
199 |
|
|
=item mirror $img |
200 |
|
|
|
201 |
|
|
Similar to tile, but reflects the image each time it uses a new copy, so |
202 |
|
|
that top edges always touch top edges, right edges always touch right |
203 |
|
|
edges and so on (with normal tiling, left edges always touch right edges |
204 |
|
|
and top always touch bottom edges). |
205 |
|
|
|
206 |
|
|
=item pad $img |
207 |
|
|
|
208 |
|
|
Takes an image and modifies it so that all pixels outside the image area |
209 |
|
|
become transparent. This mode is most useful when you want to place an |
210 |
|
|
image over another image or the background colour while leaving all |
211 |
|
|
background pixels outside the image unchanged. |
212 |
|
|
|
213 |
|
|
=item extend $img |
214 |
|
|
|
215 |
|
|
Extends the image over the whole plane, using the closest pixel in the |
216 |
|
|
area outside the image. This mode is mostly useful when you more complex |
217 |
|
|
filtering operations and want the pixels outside the image to have the |
218 |
|
|
same values as the pixels near the edge. |
219 |
|
|
|
220 |
root |
1.15 |
=cut |
221 |
|
|
|
222 |
root |
1.28 |
sub pad($) { |
223 |
|
|
my $img = $_[0]->clone; |
224 |
|
|
$img->repeat_mode (urxvt::RepeatNone); |
225 |
|
|
$img |
226 |
|
|
} |
227 |
|
|
|
228 |
|
|
sub tile($) { |
229 |
|
|
my $img = $_[0]->clone; |
230 |
|
|
$img->repeat_mode (urxvt::RepeatNormal); |
231 |
|
|
$img |
232 |
|
|
} |
233 |
|
|
|
234 |
|
|
sub mirror($) { |
235 |
|
|
my $img = $_[0]->clone; |
236 |
|
|
$img->repeat_mode (urxvt::RepeatReflect); |
237 |
|
|
$img |
238 |
|
|
} |
239 |
root |
1.4 |
|
240 |
root |
1.28 |
sub extend($) { |
241 |
root |
1.24 |
my $img = $_[0]->clone; |
242 |
root |
1.28 |
$img->repeat_mode (urxvt::RepeatPad); |
243 |
root |
1.24 |
$img |
244 |
|
|
} |
245 |
|
|
|
246 |
root |
1.28 |
=back |
247 |
|
|
|
248 |
|
|
=head2 PIXEL OPERATORS |
249 |
|
|
|
250 |
|
|
The following operators modify the image pixels in various ways. |
251 |
|
|
|
252 |
|
|
=over 4 |
253 |
|
|
|
254 |
|
|
=item clone $img |
255 |
|
|
|
256 |
|
|
Returns an exact copy of the image. |
257 |
|
|
|
258 |
|
|
=cut |
259 |
|
|
|
260 |
|
|
sub clone($) { |
261 |
|
|
$_[0]->clone |
262 |
|
|
} |
263 |
|
|
|
264 |
|
|
=item clip $img |
265 |
|
|
|
266 |
|
|
=item clip $width, $height, $img |
267 |
|
|
|
268 |
|
|
=item clip $x, $y, $width, $height, $img |
269 |
|
|
|
270 |
|
|
Clips an image to the given rectangle. If the rectangle is outside the |
271 |
|
|
image area (e.g. when C<$x> or C<$y> are negative) or the rectangle is |
272 |
|
|
larger than the image, then the tiling mode defines how the extra pixels |
273 |
|
|
will be filled. |
274 |
|
|
|
275 |
|
|
If C<$x> an C<$y> are missing, then C<0> is assumed for both. |
276 |
|
|
|
277 |
|
|
If C<$width> and C<$height> are missing, then the window size will be |
278 |
|
|
assumed. |
279 |
|
|
|
280 |
|
|
Example: load an image, blur it, and clip it to the window size to save |
281 |
|
|
memory. |
282 |
|
|
|
283 |
|
|
clip blur 10, load "mybg.png" |
284 |
|
|
|
285 |
|
|
=cut |
286 |
|
|
|
287 |
root |
1.20 |
sub clip($;$$;$$) { |
288 |
root |
1.7 |
my $img = pop; |
289 |
root |
1.30 |
my $h = pop || TH; |
290 |
|
|
my $w = pop || TW; |
291 |
root |
1.21 |
$img->sub_rect ($_[0], $_[1], $w, $h) |
292 |
root |
1.4 |
} |
293 |
|
|
|
294 |
root |
1.28 |
=item scale $img |
295 |
|
|
|
296 |
|
|
=item scale $size_percent, $img |
297 |
|
|
|
298 |
|
|
=item scale $width_percent, $height_percent, $img |
299 |
|
|
|
300 |
|
|
Scales the image by the given percentages in horizontal |
301 |
|
|
(C<$width_percent>) and vertical (C<$height_percent>) direction. |
302 |
|
|
|
303 |
|
|
If only one percentage is give, it is used for both directions. |
304 |
|
|
|
305 |
|
|
If no percentages are given, scales the image to the window size without |
306 |
|
|
keeping aspect. |
307 |
|
|
|
308 |
|
|
=item resize $width, $height, $img |
309 |
|
|
|
310 |
|
|
Resizes the image to exactly C<$width> times C<$height> pixels. |
311 |
|
|
|
312 |
|
|
=cut |
313 |
|
|
|
314 |
|
|
#TODO: maximise, maximise_fill? |
315 |
|
|
|
316 |
root |
1.33 |
sub scale($;$;$) { |
317 |
root |
1.28 |
my $img = pop; |
318 |
|
|
|
319 |
|
|
@_ == 2 ? $img->scale ($_[0] * $img->w * 0.01, $_[1] * $img->h * 0.01) |
320 |
|
|
: @_ ? $img->scale ($_[0] * $img->w * 0.01, $_[0] * $img->h * 0.01) |
321 |
root |
1.30 |
: $img->scale (TW, TH) |
322 |
root |
1.28 |
} |
323 |
|
|
|
324 |
root |
1.2 |
sub resize($$$) { |
325 |
root |
1.7 |
my $img = pop; |
326 |
|
|
$img->scale ($_[0], $_[1]) |
327 |
root |
1.1 |
} |
328 |
|
|
|
329 |
root |
1.7 |
sub move($$;$) { |
330 |
root |
1.20 |
my $img = pop->clone; |
331 |
|
|
$img->move ($_[0], $_[1]); |
332 |
|
|
$img |
333 |
root |
1.1 |
} |
334 |
|
|
|
335 |
root |
1.20 |
sub rotate($$$$$$) { |
336 |
root |
1.7 |
my $img = pop; |
337 |
|
|
$img->rotate ( |
338 |
|
|
$_[0], |
339 |
root |
1.4 |
$_[1], |
340 |
root |
1.7 |
$_[2] * $img->w * .01, |
341 |
|
|
$_[3] * $img->h * .01, |
342 |
|
|
$_[4] * (3.14159265 / 180), |
343 |
root |
1.4 |
) |
344 |
root |
1.1 |
} |
345 |
|
|
|
346 |
root |
1.28 |
sub blur($$;$) { |
347 |
|
|
my $img = pop; |
348 |
root |
1.30 |
$img->blur ($_[0], @_ >= 2 ? $_[1] : $_[0]) |
349 |
root |
1.1 |
} |
350 |
|
|
|
351 |
root |
1.2 |
sub contrast($$;$$;$) { |
352 |
root |
1.7 |
my $img = pop; |
353 |
|
|
my ($r, $g, $b, $a) = @_; |
354 |
root |
1.4 |
|
355 |
root |
1.1 |
($g, $b) = ($r, $r) if @_ < 4; |
356 |
|
|
$a = 1 if @_ < 5; |
357 |
root |
1.4 |
|
358 |
root |
1.1 |
$img = $img->clone; |
359 |
|
|
$img->contrast ($r, $g, $b, $a); |
360 |
|
|
$img |
361 |
|
|
} |
362 |
|
|
|
363 |
root |
1.2 |
sub brightness($$;$$;$) { |
364 |
root |
1.7 |
my $img = pop; |
365 |
|
|
my ($r, $g, $b, $a) = @_; |
366 |
root |
1.4 |
|
367 |
root |
1.1 |
($g, $b) = ($r, $r) if @_ < 4; |
368 |
|
|
$a = 1 if @_ < 5; |
369 |
root |
1.4 |
|
370 |
root |
1.1 |
$img = $img->clone; |
371 |
|
|
$img->brightness ($r, $g, $b, $a); |
372 |
|
|
$img |
373 |
|
|
} |
374 |
|
|
|
375 |
root |
1.15 |
=back |
376 |
|
|
|
377 |
|
|
=cut |
378 |
|
|
|
379 |
root |
1.1 |
} |
380 |
|
|
|
381 |
|
|
sub parse_expr { |
382 |
|
|
my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; |
383 |
|
|
die if $@; |
384 |
|
|
$expr |
385 |
|
|
} |
386 |
|
|
|
387 |
|
|
# compiles a parsed expression |
388 |
|
|
sub set_expr { |
389 |
|
|
my ($self, $expr) = @_; |
390 |
|
|
|
391 |
|
|
$self->{expr} = $expr; |
392 |
|
|
$self->recalculate; |
393 |
|
|
} |
394 |
|
|
|
395 |
|
|
# evaluate the current bg expression |
396 |
|
|
sub recalculate { |
397 |
root |
1.33 |
my ($arg_self) = @_; |
398 |
root |
1.1 |
|
399 |
root |
1.10 |
# rate limit evaluation |
400 |
|
|
|
401 |
root |
1.33 |
if ($arg_self->{next_refresh} > urxvt::NOW) { |
402 |
|
|
$arg_self->{next_refresh_timer} = urxvt::timer->new->after ($arg_self->{next_refresh} - urxvt::NOW)->cb (sub { |
403 |
|
|
$arg_self->recalculate; |
404 |
root |
1.9 |
}); |
405 |
root |
1.12 |
return; |
406 |
root |
1.9 |
} |
407 |
|
|
|
408 |
root |
1.33 |
$arg_self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL; |
409 |
root |
1.9 |
|
410 |
root |
1.10 |
# set environment to evaluate user expression |
411 |
root |
1.6 |
|
412 |
root |
1.33 |
local $self = $arg_self; |
413 |
root |
1.1 |
|
414 |
root |
1.3 |
local $old = $self->{state}; |
415 |
|
|
local $new = my $state = $self->{state} = {}; |
416 |
root |
1.1 |
|
417 |
root |
1.29 |
($x, $y, $w, $h) = |
418 |
root |
1.33 |
$self->background_geometry ($self->{border}); |
419 |
root |
1.22 |
|
420 |
root |
1.10 |
# evaluate user expression |
421 |
|
|
|
422 |
root |
1.1 |
my $img = eval { $self->{expr}->() }; |
423 |
|
|
warn $@ if $@;#d# |
424 |
root |
1.15 |
die if !UNIVERSAL::isa $img, "urxvt::img"; |
425 |
root |
1.1 |
|
426 |
root |
1.10 |
# if the expression is sensitive to external events, prepare reevaluation then |
427 |
|
|
|
428 |
root |
1.2 |
my $repeat; |
429 |
|
|
|
430 |
root |
1.1 |
if (my $again = $state->{again}) { |
431 |
root |
1.2 |
$repeat = 1; |
432 |
root |
1.6 |
$state->{timer} = $again == $old->{again} |
433 |
|
|
? $old->{timer} |
434 |
root |
1.7 |
: urxvt::timer->new->after ($again)->interval ($again)->cb (sub { |
435 |
|
|
++$self->{counter}; |
436 |
|
|
$self->recalculate |
437 |
|
|
}); |
438 |
root |
1.1 |
} |
439 |
|
|
|
440 |
root |
1.2 |
if (delete $state->{position_sensitive}) { |
441 |
|
|
$repeat = 1; |
442 |
|
|
$self->enable (position_change => sub { $_[0]->recalculate }); |
443 |
|
|
} else { |
444 |
|
|
$self->disable ("position_change"); |
445 |
|
|
} |
446 |
|
|
|
447 |
|
|
if (delete $state->{size_sensitive}) { |
448 |
|
|
$repeat = 1; |
449 |
|
|
$self->enable (size_change => sub { $_[0]->recalculate }); |
450 |
|
|
} else { |
451 |
|
|
$self->disable ("size_change"); |
452 |
|
|
} |
453 |
|
|
|
454 |
root |
1.9 |
if (delete $state->{rootpmap_sensitive}) { |
455 |
|
|
$repeat = 1; |
456 |
|
|
$self->enable (rootpmap_change => sub { $_[0]->recalculate }); |
457 |
|
|
} else { |
458 |
|
|
$self->disable ("rootpmap_change"); |
459 |
|
|
} |
460 |
|
|
|
461 |
root |
1.10 |
# clear stuff we no longer need |
462 |
|
|
|
463 |
root |
1.6 |
%$old = (); |
464 |
|
|
|
465 |
root |
1.5 |
unless ($repeat) { |
466 |
|
|
delete $self->{state}; |
467 |
|
|
delete $self->{expr}; |
468 |
|
|
} |
469 |
|
|
|
470 |
root |
1.10 |
# prepare and set background pixmap |
471 |
|
|
|
472 |
root |
1.4 |
$img = $img->sub_rect (0, 0, $w, $h) |
473 |
|
|
if $img->w != $w || $img->h != $h; |
474 |
root |
1.1 |
|
475 |
root |
1.33 |
$self->set_background ($img, $self->{border}); |
476 |
root |
1.1 |
$self->scr_recolour (0); |
477 |
|
|
$self->want_refresh; |
478 |
|
|
} |
479 |
|
|
|
480 |
|
|
sub on_start { |
481 |
|
|
my ($self) = @_; |
482 |
|
|
|
483 |
root |
1.33 |
my $expr = $self->x_resource ("background.expr") |
484 |
|
|
or return; |
485 |
|
|
|
486 |
|
|
$self->set_expr (parse_expr $expr); |
487 |
|
|
$self->{border} = $self->x_resource_boolean ("background.border"); |
488 |
root |
1.1 |
|
489 |
|
|
() |
490 |
|
|
} |
491 |
|
|
|