1 |
root |
1.1 |
#! perl |
2 |
|
|
|
3 |
root |
1.88 |
#:META:RESOURCE:%.expr:string:background expression |
4 |
|
|
#:META:RESOURCE:%.border:boolean:respect the terminal border |
5 |
|
|
#:META:RESOURCE:%.interval:seconds:minimum time between updates |
6 |
sf-exg |
1.92 |
#:META:RESOURCE:pixmap:file[;geom]:set image as background |
7 |
|
|
#:META:RESOURCE:backgroundPixmap:file[;geom]:set image as background |
8 |
|
|
#:META:RESOURCE:tr:boolean:set root pixmap as background |
9 |
|
|
#:META:RESOURCE:transparent:boolean:set root pixmap as background |
10 |
|
|
#:META:RESOURCE:tint:color:tint background with color |
11 |
|
|
#:META:RESOURCE:tintColor:color:tint background with color |
12 |
|
|
#:META:RESOURCE:sh:number:shade background by number % |
13 |
|
|
#:META:RESOURCE:shading:number:shade background by number % |
14 |
|
|
#:META:RESOURCE:blr:HxV:gaussian-blur background with radii |
15 |
|
|
#:META:RESOURCE:blurRadius:HxV:gaussian-blur background with radii |
16 |
root |
1.33 |
|
17 |
root |
1.41 |
=head1 NAME |
18 |
root |
1.33 |
|
19 |
root |
1.79 |
background - manage terminal background |
20 |
root |
1.41 |
|
21 |
|
|
=head1 SYNOPSIS |
22 |
root |
1.33 |
|
23 |
root |
1.36 |
urxvt --background-expr 'background expression' |
24 |
|
|
--background-border |
25 |
root |
1.46 |
--background-interval seconds |
26 |
root |
1.33 |
|
27 |
root |
1.75 |
=head1 QUICK AND DIRTY CHEAT SHEET |
28 |
|
|
|
29 |
|
|
Just load a random jpeg image and tile the background with it without |
30 |
|
|
scaling or anything else: |
31 |
|
|
|
32 |
|
|
load "/path/to/img.jpg" |
33 |
|
|
|
34 |
|
|
The same, but use mirroring/reflection instead of tiling: |
35 |
|
|
|
36 |
|
|
mirror load "/path/to/img.jpg" |
37 |
|
|
|
38 |
|
|
Load an image and scale it to exactly fill the terminal window: |
39 |
|
|
|
40 |
|
|
scale keep { load "/path/to/img.jpg" } |
41 |
|
|
|
42 |
|
|
Implement pseudo-transparency by using a suitably-aligned root pixmap |
43 |
|
|
as window background: |
44 |
|
|
|
45 |
|
|
rootalign root |
46 |
|
|
|
47 |
|
|
Likewise, but keep a blurred copy: |
48 |
|
|
|
49 |
|
|
rootalign keep { blur 10, root } |
50 |
|
|
|
51 |
root |
1.41 |
=head1 DESCRIPTION |
52 |
root |
1.33 |
|
53 |
root |
1.36 |
This extension manages the terminal background by creating a picture that |
54 |
|
|
is behind the text, replacing the normal background colour. |
55 |
|
|
|
56 |
|
|
It does so by evaluating a Perl expression that I<calculates> the image on |
57 |
|
|
the fly, for example, by grabbing the root background or loading a file. |
58 |
|
|
|
59 |
|
|
While the full power of Perl is available, the operators have been design |
60 |
|
|
to be as simple as possible. |
61 |
|
|
|
62 |
|
|
For example, to load an image and scale it to the window size, you would |
63 |
|
|
use: |
64 |
|
|
|
65 |
root |
1.64 |
urxvt --background-expr 'scale keep { load "/path/to/mybg.png" }' |
66 |
root |
1.36 |
|
67 |
|
|
Or specified as a X resource: |
68 |
|
|
|
69 |
sf-exg |
1.90 |
URxvt.background.expr: scale keep { load "/path/to/mybg.png" } |
70 |
root |
1.36 |
|
71 |
root |
1.41 |
=head1 THEORY OF OPERATION |
72 |
root |
1.36 |
|
73 |
|
|
At startup, just before the window is mapped for the first time, the |
74 |
|
|
expression is evaluated and must yield an image. The image is then |
75 |
|
|
extended as necessary to cover the whole terminal window, and is set as a |
76 |
|
|
background pixmap. |
77 |
|
|
|
78 |
|
|
If the image contains an alpha channel, then it will be used as-is in |
79 |
|
|
visuals that support alpha channels (for example, for a compositing |
80 |
|
|
manager). In other visuals, the terminal background colour will be used to |
81 |
|
|
replace any transparency. |
82 |
|
|
|
83 |
|
|
When the expression relies, directly or indirectly, on the window size, |
84 |
|
|
position, the root pixmap, or a timer, then it will be remembered. If not, |
85 |
|
|
then it will be removed. |
86 |
|
|
|
87 |
|
|
If any of the parameters that the expression relies on changes (when the |
88 |
|
|
window is moved or resized, its position or size changes; when the root |
89 |
|
|
pixmap is replaced by another one the root background changes; or when the |
90 |
|
|
timer elapses), then the expression will be evaluated again. |
91 |
|
|
|
92 |
root |
1.64 |
For example, an expression such as C<scale keep { load "$HOME/mybg.png" |
93 |
|
|
}> scales the image to the window size, so it relies on the window size |
94 |
|
|
and will be reevaluated each time it is changed, but not when it moves for |
95 |
root |
1.36 |
example. That ensures that the picture always fills the terminal, even |
96 |
sf-exg |
1.51 |
after its size changes. |
97 |
root |
1.36 |
|
98 |
root |
1.41 |
=head2 EXPRESSIONS |
99 |
root |
1.36 |
|
100 |
|
|
Expressions are normal Perl expressions, in fact, they are Perl blocks - |
101 |
|
|
which means you could use multiple lines and statements: |
102 |
|
|
|
103 |
root |
1.64 |
scale keep { |
104 |
|
|
again 3600; |
105 |
|
|
if (localtime now)[6]) { |
106 |
|
|
return load "$HOME/weekday.png"; |
107 |
|
|
} else { |
108 |
|
|
return load "$HOME/sunday.png"; |
109 |
|
|
} |
110 |
root |
1.36 |
} |
111 |
|
|
|
112 |
root |
1.68 |
This inner expression is evaluated once per hour (and whenever the |
113 |
sf-exg |
1.73 |
terminal window is resized). It sets F<sunday.png> as background on |
114 |
root |
1.68 |
Sundays, and F<weekday.png> on all other days. |
115 |
root |
1.36 |
|
116 |
|
|
Fortunately, we expect that most expressions will be much simpler, with |
117 |
|
|
little Perl knowledge needed. |
118 |
|
|
|
119 |
|
|
Basically, you always start with a function that "generates" an image |
120 |
|
|
object, such as C<load>, which loads an image from disk, or C<root>, which |
121 |
|
|
returns the root window background image: |
122 |
|
|
|
123 |
|
|
load "$HOME/mypic.png" |
124 |
|
|
|
125 |
|
|
The path is usually specified as a quoted string (the exact rules can be |
126 |
|
|
found in the L<perlop> manpage). The F<$HOME> at the beginning of the |
127 |
|
|
string is expanded to the home directory. |
128 |
|
|
|
129 |
|
|
Then you prepend one or more modifiers or filtering expressions, such as |
130 |
|
|
C<scale>: |
131 |
|
|
|
132 |
|
|
scale load "$HOME/mypic.png" |
133 |
|
|
|
134 |
|
|
Just like a mathematical expression with functions, you should read these |
135 |
|
|
expressions from right to left, as the C<load> is evaluated first, and |
136 |
|
|
its result becomes the argument to the C<scale> function. |
137 |
|
|
|
138 |
|
|
Many operators also allow some parameters preceding the input image |
139 |
|
|
that modify its behaviour. For example, C<scale> without any additional |
140 |
|
|
arguments scales the image to size of the terminal window. If you specify |
141 |
root |
1.43 |
an additional argument, it uses it as a scale factor (multiply by 100 to |
142 |
|
|
get a percentage): |
143 |
root |
1.36 |
|
144 |
root |
1.43 |
scale 2, load "$HOME/mypic.png" |
145 |
root |
1.36 |
|
146 |
|
|
This enlarges the image by a factor of 2 (200%). As you can see, C<scale> |
147 |
sf-exg |
1.91 |
has now two arguments, the C<2> and the C<load> expression, while |
148 |
root |
1.36 |
C<load> only has one argument. Arguments are separated from each other by |
149 |
|
|
commas. |
150 |
|
|
|
151 |
|
|
Scale also accepts two arguments, which are then separate factors for both |
152 |
|
|
horizontal and vertical dimensions. For example, this halves the image |
153 |
|
|
width and doubles the image height: |
154 |
|
|
|
155 |
root |
1.43 |
scale 0.5, 2, load "$HOME/mypic.png" |
156 |
root |
1.36 |
|
157 |
root |
1.68 |
IF you try out these expressions, you might suffer from some sluggishness, |
158 |
sf-exg |
1.73 |
because each time the terminal is resized, it loads the PNG image again |
159 |
root |
1.68 |
and scales it. Scaling is usually fast (and unavoidable), but loading the |
160 |
|
|
image can be quite time consuming. This is where C<keep> comes in handy: |
161 |
root |
1.39 |
|
162 |
root |
1.64 |
scale 0.5, 2, keep { load "$HOME/mypic.png" } |
163 |
root |
1.39 |
|
164 |
root |
1.64 |
The C<keep> operator executes all the statements inside the braces only |
165 |
|
|
once, or when it thinks the outcome might change. In other cases it |
166 |
|
|
returns the last value computed by the brace block. |
167 |
root |
1.39 |
|
168 |
root |
1.64 |
This means that the C<load> is only executed once, which makes it much |
169 |
sf-exg |
1.65 |
faster, but also means that more memory is being used, because the loaded |
170 |
root |
1.64 |
image must be kept in memory at all times. In this expression, the |
171 |
|
|
trade-off is likely worth it. |
172 |
root |
1.39 |
|
173 |
root |
1.64 |
But back to effects: Other effects than scaling are also readily |
174 |
|
|
available, for example, you can tile the image to fill the whole window, |
175 |
|
|
instead of resizing it: |
176 |
root |
1.39 |
|
177 |
root |
1.64 |
tile keep { load "$HOME/mypic.png" } |
178 |
root |
1.39 |
|
179 |
root |
1.64 |
In fact, images returned by C<load> are in C<tile> mode by default, so the |
180 |
|
|
C<tile> operator is kind of superfluous. |
181 |
root |
1.39 |
|
182 |
root |
1.64 |
Another common effect is to mirror the image, so that the same edges |
183 |
|
|
touch: |
184 |
root |
1.36 |
|
185 |
root |
1.64 |
mirror keep { load "$HOME/mypic.png" } |
186 |
root |
1.36 |
|
187 |
root |
1.64 |
Another common background expression is: |
188 |
root |
1.63 |
|
189 |
root |
1.64 |
rootalign root |
190 |
root |
1.39 |
|
191 |
root |
1.64 |
This one first takes a snapshot of the screen background image, and then |
192 |
sf-exg |
1.65 |
moves it to the upper left corner of the screen (as opposed to the upper |
193 |
root |
1.64 |
left corner of the terminal window)- the result is pseudo-transparency: |
194 |
|
|
the image seems to be static while the window is moved around. |
195 |
|
|
|
196 |
root |
1.71 |
=head2 COLOUR SPECIFICATIONS |
197 |
|
|
|
198 |
sf-exg |
1.73 |
Whenever an operator expects a "colour", then this can be specified in one |
199 |
root |
1.71 |
of two ways: Either as string with an X11 colour specification, such as: |
200 |
|
|
|
201 |
|
|
"red" # named colour |
202 |
|
|
"#f00" # simple rgb |
203 |
|
|
"[50]red" # red with 50% alpha |
204 |
|
|
"TekHVC:300/50/50" # anything goes |
205 |
|
|
|
206 |
|
|
OR as an array reference with one, three or four components: |
207 |
|
|
|
208 |
|
|
[0.5] # 50% gray, 100% alpha |
209 |
|
|
[0.5, 0, 0] # dark red, no green or blur, 100% alpha |
210 |
|
|
[0.5, 0, 0, 0.7] # same with explicit 70% alpha |
211 |
|
|
|
212 |
root |
1.64 |
=head2 CACHING AND SENSITIVITY |
213 |
|
|
|
214 |
|
|
Since some operations (such as C<load> and C<blur>) can take a long time, |
215 |
|
|
caching results can be very important for a smooth operation. Caching can |
216 |
|
|
also be useful to reduce memory usage, though, for example, when an image |
217 |
|
|
is cached by C<load>, it could be shared by multiple terminal windows |
218 |
|
|
running inside urxvtd. |
219 |
|
|
|
220 |
|
|
=head3 C<keep { ... }> caching |
221 |
|
|
|
222 |
|
|
The most important way to cache expensive operations is to use C<keep { |
223 |
|
|
... }>. The C<keep> operator takes a block of multiple statements enclosed |
224 |
|
|
by C<{}> and keeps the return value in memory. |
225 |
|
|
|
226 |
|
|
An expression can be "sensitive" to various external events, such as |
227 |
sf-exg |
1.65 |
scaling or moving the window, root background changes and timers. Simply |
228 |
sf-exg |
1.67 |
using an expression (such as C<scale> without parameters) that depends on |
229 |
root |
1.64 |
certain changing values (called "variables"), or using those variables |
230 |
|
|
directly, will make an expression sensitive to these events - for example, |
231 |
|
|
using C<scale> or C<TW> will make the expression sensitive to the terminal |
232 |
|
|
size, and thus to resizing events. |
233 |
root |
1.39 |
|
234 |
root |
1.64 |
When such an event happens, C<keep> will automatically trigger a |
235 |
|
|
reevaluation of the whole expression with the new value of the expression. |
236 |
root |
1.39 |
|
237 |
root |
1.64 |
C<keep> is most useful for expensive operations, such as C<blur>: |
238 |
root |
1.39 |
|
239 |
root |
1.68 |
rootalign keep { blur 20, root } |
240 |
root |
1.39 |
|
241 |
root |
1.64 |
This makes a blurred copy of the root background once, and on subsequent |
242 |
|
|
calls, just root-aligns it. Since C<blur> is usually quite slow and |
243 |
|
|
C<rootalign> is quite fast, this trades extra memory (for the cached |
244 |
|
|
blurred pixmap) with speed (blur only needs to be redone when root |
245 |
|
|
changes). |
246 |
root |
1.39 |
|
247 |
root |
1.64 |
=head3 C<load> caching |
248 |
root |
1.36 |
|
249 |
root |
1.64 |
The C<load> operator itself does not keep images in memory, but as long as |
250 |
|
|
the image is still in memory, C<load> will use the in-memory image instead |
251 |
|
|
of loading it freshly from disk. |
252 |
root |
1.63 |
|
253 |
root |
1.64 |
That means that this expression: |
254 |
root |
1.63 |
|
255 |
root |
1.64 |
keep { load "$HOME/path..." } |
256 |
root |
1.63 |
|
257 |
root |
1.64 |
Not only caches the image in memory, other terminal instances that try to |
258 |
|
|
C<load> it can reuse that in-memory copy. |
259 |
root |
1.63 |
|
260 |
root |
1.41 |
=head1 REFERENCE |
261 |
root |
1.33 |
|
262 |
root |
1.41 |
=head2 COMMAND LINE SWITCHES |
263 |
root |
1.36 |
|
264 |
|
|
=over 4 |
265 |
|
|
|
266 |
|
|
=item --background-expr perl-expression |
267 |
|
|
|
268 |
|
|
Specifies the Perl expression to evaluate. |
269 |
|
|
|
270 |
|
|
=item --background-border |
271 |
|
|
|
272 |
|
|
By default, the expression creates an image that fills the full window, |
273 |
|
|
overwriting borders and any other areas, such as the scrollbar. |
274 |
|
|
|
275 |
|
|
Specifying this flag changes the behaviour, so that the image only |
276 |
|
|
replaces the background of the character area. |
277 |
|
|
|
278 |
root |
1.46 |
=item --background-interval seconds |
279 |
|
|
|
280 |
sf-exg |
1.51 |
Since some operations in the underlying XRender extension can effectively |
281 |
root |
1.46 |
freeze your X-server for prolonged time, this extension enforces a minimum |
282 |
|
|
time between updates, which is normally about 0.1 seconds. |
283 |
|
|
|
284 |
|
|
If you want to do updates more often, you can decrease this safety |
285 |
|
|
interval with this switch. |
286 |
|
|
|
287 |
root |
1.36 |
=back |
288 |
|
|
|
289 |
root |
1.33 |
=cut |
290 |
root |
1.12 |
|
291 |
root |
1.52 |
our %_IMG_CACHE; |
292 |
root |
1.36 |
our $HOME; |
293 |
root |
1.63 |
our ($self, $frame); |
294 |
root |
1.84 |
our ($x, $y, $w, $h, $focus); |
295 |
root |
1.3 |
|
296 |
root |
1.16 |
# enforce at least this interval between updates |
297 |
root |
1.46 |
our $MIN_INTERVAL = 6/59.951; |
298 |
root |
1.9 |
|
299 |
root |
1.1 |
{ |
300 |
|
|
package urxvt::bgdsl; # background language |
301 |
|
|
|
302 |
root |
1.63 |
sub FR_PARENT() { 0 } # parent frame, if any - must be #0 |
303 |
|
|
sub FR_CACHE () { 1 } # cached values |
304 |
|
|
sub FR_AGAIN () { 2 } # what this expr is sensitive to |
305 |
|
|
sub FR_STATE () { 3 } # watchers etc. |
306 |
|
|
|
307 |
root |
1.43 |
use List::Util qw(min max sum shuffle); |
308 |
|
|
|
309 |
root |
1.15 |
=head2 PROVIDERS/GENERATORS |
310 |
|
|
|
311 |
root |
1.31 |
These functions provide an image, by loading it from disk, grabbing it |
312 |
sf-exg |
1.32 |
from the root screen or by simply generating it. They are used as starting |
313 |
root |
1.31 |
points to get an image you can play with. |
314 |
|
|
|
315 |
root |
1.15 |
=over 4 |
316 |
|
|
|
317 |
|
|
=item load $path |
318 |
|
|
|
319 |
root |
1.29 |
Loads the image at the given C<$path>. The image is set to plane tiling |
320 |
|
|
mode. |
321 |
|
|
|
322 |
sf-exg |
1.65 |
If the image is already in memory (e.g. because another terminal instance |
323 |
sf-exg |
1.83 |
uses it), then the in-memory copy is returned instead. |
324 |
root |
1.54 |
|
325 |
root |
1.64 |
=item load_uc $path |
326 |
|
|
|
327 |
|
|
Load uncached - same as load, but does not cache the image, which means it |
328 |
root |
1.72 |
is I<always> loaded from the filesystem again, even if another copy of it |
329 |
|
|
is in memory at the time. |
330 |
root |
1.29 |
|
331 |
root |
1.15 |
=cut |
332 |
|
|
|
333 |
root |
1.72 |
sub load_uc($) { |
334 |
|
|
$self->new_img_from_file ($_[0]) |
335 |
|
|
} |
336 |
|
|
|
337 |
root |
1.63 |
sub load($) { |
338 |
root |
1.54 |
my ($path) = @_; |
339 |
|
|
|
340 |
|
|
$_IMG_CACHE{$path} || do { |
341 |
root |
1.72 |
my $img = load_uc $path; |
342 |
root |
1.54 |
Scalar::Util::weaken ($_IMG_CACHE{$path} = $img); |
343 |
|
|
$img |
344 |
|
|
} |
345 |
|
|
} |
346 |
|
|
|
347 |
root |
1.31 |
=item root |
348 |
|
|
|
349 |
|
|
Returns the root window pixmap, that is, hopefully, the background image |
350 |
root |
1.62 |
of your screen. |
351 |
root |
1.31 |
|
352 |
|
|
This function makes your expression root sensitive, that means it will be |
353 |
|
|
reevaluated when the bg image changes. |
354 |
|
|
|
355 |
|
|
=cut |
356 |
|
|
|
357 |
root |
1.2 |
sub root() { |
358 |
root |
1.63 |
$frame->[FR_AGAIN]{rootpmap} = 1; |
359 |
root |
1.52 |
$self->new_img_from_root |
360 |
root |
1.1 |
} |
361 |
|
|
|
362 |
root |
1.31 |
=item solid $colour |
363 |
|
|
|
364 |
|
|
=item solid $width, $height, $colour |
365 |
|
|
|
366 |
|
|
Creates a new image and completely fills it with the given colour. The |
367 |
|
|
image is set to tiling mode. |
368 |
|
|
|
369 |
root |
1.40 |
If C<$width> and C<$height> are omitted, it creates a 1x1 image, which is |
370 |
root |
1.31 |
useful for solid backgrounds or for use in filtering effects. |
371 |
|
|
|
372 |
|
|
=cut |
373 |
|
|
|
374 |
root |
1.42 |
sub solid($;$$) { |
375 |
root |
1.31 |
my $colour = pop; |
376 |
|
|
|
377 |
root |
1.59 |
my $img = $self->new_img (urxvt::PictStandardARGB32, 0, 0, $_[0] || 1, $_[1] || 1); |
378 |
root |
1.31 |
$img->fill ($colour); |
379 |
root |
1.15 |
$img |
380 |
|
|
} |
381 |
|
|
|
382 |
root |
1.45 |
=item clone $img |
383 |
root |
1.31 |
|
384 |
root |
1.45 |
Returns an exact copy of the image. This is useful if you want to have |
385 |
|
|
multiple copies of the same image to apply different effects to. |
386 |
root |
1.31 |
|
387 |
root |
1.20 |
=cut |
388 |
|
|
|
389 |
root |
1.45 |
sub clone($) { |
390 |
|
|
$_[0]->clone |
391 |
root |
1.20 |
} |
392 |
|
|
|
393 |
root |
1.56 |
=item merge $img ... |
394 |
|
|
|
395 |
root |
1.57 |
Takes any number of images and merges them together, creating a single |
396 |
root |
1.62 |
image containing them all. The tiling mode of the first image is used as |
397 |
sf-exg |
1.65 |
the tiling mode of the resulting image. |
398 |
root |
1.56 |
|
399 |
root |
1.61 |
This function is called automatically when an expression returns multiple |
400 |
|
|
images. |
401 |
|
|
|
402 |
root |
1.56 |
=cut |
403 |
|
|
|
404 |
|
|
sub merge(@) { |
405 |
root |
1.61 |
return $_[0] unless $#_; |
406 |
|
|
|
407 |
root |
1.58 |
# rather annoyingly clumsy, but optimisation is for another time |
408 |
|
|
|
409 |
root |
1.59 |
my $x0 = +1e9; |
410 |
|
|
my $y0 = +1e9; |
411 |
root |
1.58 |
my $x1 = -1e9; |
412 |
|
|
my $y1 = -1e9; |
413 |
|
|
|
414 |
|
|
for (@_) { |
415 |
|
|
my ($x, $y, $w, $h) = $_->geometry; |
416 |
|
|
|
417 |
|
|
$x0 = $x if $x0 > $x; |
418 |
|
|
$y0 = $y if $y0 > $y; |
419 |
|
|
|
420 |
|
|
$x += $w; |
421 |
|
|
$y += $h; |
422 |
|
|
|
423 |
root |
1.59 |
$x1 = $x if $x1 < $x; |
424 |
|
|
$y1 = $y if $y1 < $y; |
425 |
root |
1.58 |
} |
426 |
|
|
|
427 |
root |
1.59 |
my $base = $self->new_img (urxvt::PictStandardARGB32, $x0, $y0, $x1 - $x0, $y1 - $y0); |
428 |
root |
1.62 |
$base->repeat_mode ($_[0]->repeat_mode); |
429 |
root |
1.58 |
$base->fill ([0, 0, 0, 0]); |
430 |
|
|
|
431 |
root |
1.59 |
$base->draw ($_) |
432 |
root |
1.58 |
for @_; |
433 |
|
|
|
434 |
|
|
$base |
435 |
root |
1.56 |
} |
436 |
|
|
|
437 |
root |
1.76 |
=back |
438 |
|
|
|
439 |
root |
1.28 |
=head2 TILING MODES |
440 |
|
|
|
441 |
|
|
The following operators modify the tiling mode of an image, that is, the |
442 |
|
|
way that pixels outside the image area are painted when the image is used. |
443 |
root |
1.15 |
|
444 |
|
|
=over 4 |
445 |
|
|
|
446 |
root |
1.28 |
=item tile $img |
447 |
|
|
|
448 |
|
|
Tiles the whole plane with the image and returns this new image - or in |
449 |
|
|
other words, it returns a copy of the image in plane tiling mode. |
450 |
|
|
|
451 |
root |
1.34 |
Example: load an image and tile it over the background, without |
452 |
|
|
resizing. The C<tile> call is superfluous because C<load> already defaults |
453 |
|
|
to tiling mode. |
454 |
|
|
|
455 |
|
|
tile load "mybg.png" |
456 |
|
|
|
457 |
root |
1.28 |
=item mirror $img |
458 |
|
|
|
459 |
|
|
Similar to tile, but reflects the image each time it uses a new copy, so |
460 |
|
|
that top edges always touch top edges, right edges always touch right |
461 |
|
|
edges and so on (with normal tiling, left edges always touch right edges |
462 |
|
|
and top always touch bottom edges). |
463 |
|
|
|
464 |
root |
1.36 |
Example: load an image and mirror it over the background, avoiding sharp |
465 |
root |
1.34 |
edges at the image borders at the expense of mirroring the image itself |
466 |
|
|
|
467 |
|
|
mirror load "mybg.png" |
468 |
|
|
|
469 |
root |
1.28 |
=item pad $img |
470 |
|
|
|
471 |
|
|
Takes an image and modifies it so that all pixels outside the image area |
472 |
|
|
become transparent. This mode is most useful when you want to place an |
473 |
|
|
image over another image or the background colour while leaving all |
474 |
|
|
background pixels outside the image unchanged. |
475 |
|
|
|
476 |
root |
1.36 |
Example: load an image and display it in the upper left corner. The rest |
477 |
sf-exg |
1.51 |
of the space is left "empty" (transparent or whatever your compositor does |
478 |
root |
1.34 |
in alpha mode, else background colour). |
479 |
|
|
|
480 |
|
|
pad load "mybg.png" |
481 |
|
|
|
482 |
root |
1.28 |
=item extend $img |
483 |
|
|
|
484 |
|
|
Extends the image over the whole plane, using the closest pixel in the |
485 |
sf-exg |
1.51 |
area outside the image. This mode is mostly useful when you use more complex |
486 |
root |
1.28 |
filtering operations and want the pixels outside the image to have the |
487 |
|
|
same values as the pixels near the edge. |
488 |
|
|
|
489 |
root |
1.34 |
Example: just for curiosity, how does this pixel extension stuff work? |
490 |
|
|
|
491 |
|
|
extend move 50, 50, load "mybg.png" |
492 |
|
|
|
493 |
root |
1.15 |
=cut |
494 |
|
|
|
495 |
root |
1.28 |
sub pad($) { |
496 |
|
|
my $img = $_[0]->clone; |
497 |
|
|
$img->repeat_mode (urxvt::RepeatNone); |
498 |
|
|
$img |
499 |
|
|
} |
500 |
|
|
|
501 |
|
|
sub tile($) { |
502 |
|
|
my $img = $_[0]->clone; |
503 |
|
|
$img->repeat_mode (urxvt::RepeatNormal); |
504 |
|
|
$img |
505 |
|
|
} |
506 |
|
|
|
507 |
|
|
sub mirror($) { |
508 |
|
|
my $img = $_[0]->clone; |
509 |
|
|
$img->repeat_mode (urxvt::RepeatReflect); |
510 |
|
|
$img |
511 |
|
|
} |
512 |
root |
1.4 |
|
513 |
root |
1.28 |
sub extend($) { |
514 |
root |
1.24 |
my $img = $_[0]->clone; |
515 |
root |
1.28 |
$img->repeat_mode (urxvt::RepeatPad); |
516 |
root |
1.24 |
$img |
517 |
|
|
} |
518 |
|
|
|
519 |
root |
1.28 |
=back |
520 |
|
|
|
521 |
root |
1.45 |
=head2 VARIABLE VALUES |
522 |
root |
1.28 |
|
523 |
root |
1.45 |
The following functions provide variable data such as the terminal window |
524 |
|
|
dimensions. They are not (Perl-) variables, they just return stuff that |
525 |
|
|
varies. Most of them make your expression sensitive to some events, for |
526 |
|
|
example using C<TW> (terminal width) means your expression is evaluated |
527 |
|
|
again when the terminal is resized. |
528 |
root |
1.28 |
|
529 |
|
|
=over 4 |
530 |
|
|
|
531 |
root |
1.45 |
=item TX |
532 |
|
|
|
533 |
|
|
=item TY |
534 |
|
|
|
535 |
|
|
Return the X and Y coordinates of the terminal window (the terminal |
536 |
|
|
window is the full window by default, and the character area only when in |
537 |
|
|
border-respect mode). |
538 |
|
|
|
539 |
root |
1.84 |
Using these functions makes your expression sensitive to window moves. |
540 |
root |
1.45 |
|
541 |
|
|
These functions are mainly useful to align images to the root window. |
542 |
|
|
|
543 |
|
|
Example: load an image and align it so it looks as if anchored to the |
544 |
root |
1.64 |
background (that's exactly what C<rootalign> does btw.): |
545 |
root |
1.45 |
|
546 |
root |
1.64 |
move -TX, -TY, keep { load "mybg.png" } |
547 |
root |
1.45 |
|
548 |
|
|
=item TW |
549 |
|
|
|
550 |
root |
1.77 |
=item TH |
551 |
|
|
|
552 |
root |
1.45 |
Return the width (C<TW>) and height (C<TH>) of the terminal window (the |
553 |
|
|
terminal window is the full window by default, and the character area only |
554 |
|
|
when in border-respect mode). |
555 |
|
|
|
556 |
root |
1.84 |
Using these functions makes your expression sensitive to window resizes. |
557 |
root |
1.45 |
|
558 |
|
|
These functions are mainly useful to scale images, or to clip images to |
559 |
|
|
the window size to conserve memory. |
560 |
|
|
|
561 |
|
|
Example: take the screen background, clip it to the window size, blur it a |
562 |
|
|
bit, align it to the window position and use it as background. |
563 |
|
|
|
564 |
root |
1.64 |
clip move -TX, -TY, keep { blur 5, root } |
565 |
root |
1.45 |
|
566 |
root |
1.84 |
=item FOCUS |
567 |
|
|
|
568 |
|
|
Returns a boolean indicating whether the terminal window has keyboard |
569 |
|
|
focus, in which case it returns true. |
570 |
|
|
|
571 |
|
|
Using this function makes your expression sensitive to focus changes. |
572 |
|
|
|
573 |
|
|
A common use case is to fade the background image when the terminal loses |
574 |
|
|
focus, often together with the C<-fade> command line option. In fact, |
575 |
|
|
there is a special function for just that use case: C<focus_fade>. |
576 |
|
|
|
577 |
sf-exg |
1.86 |
Example: use two entirely different background images, depending on |
578 |
root |
1.84 |
whether the window has focus. |
579 |
|
|
|
580 |
|
|
FOCUS ? keep { load "has_focus.jpg" } : keep { load "no_focus.jpg" } |
581 |
|
|
|
582 |
root |
1.45 |
=cut |
583 |
|
|
|
584 |
root |
1.84 |
sub TX () { $frame->[FR_AGAIN]{position} = 1; $x } |
585 |
|
|
sub TY () { $frame->[FR_AGAIN]{position} = 1; $y } |
586 |
|
|
sub TW () { $frame->[FR_AGAIN]{size} = 1; $w } |
587 |
|
|
sub TH () { $frame->[FR_AGAIN]{size} = 1; $h } |
588 |
|
|
sub FOCUS() { $frame->[FR_AGAIN]{focus} = 1; $focus } |
589 |
root |
1.45 |
|
590 |
|
|
=item now |
591 |
|
|
|
592 |
|
|
Returns the current time as (fractional) seconds since the epoch. |
593 |
|
|
|
594 |
|
|
Using this expression does I<not> make your expression sensitive to time, |
595 |
|
|
but the next two functions do. |
596 |
|
|
|
597 |
|
|
=item again $seconds |
598 |
|
|
|
599 |
|
|
When this function is used the expression will be reevaluated again in |
600 |
|
|
C<$seconds> seconds. |
601 |
|
|
|
602 |
|
|
Example: load some image and rotate it according to the time of day (as if it were |
603 |
|
|
the hour pointer of a clock). Update this image every minute. |
604 |
|
|
|
605 |
root |
1.64 |
again 60; |
606 |
|
|
rotate 50, 50, (now % 86400) * -72 / 8640, scale keep { load "myclock.png" } |
607 |
root |
1.28 |
|
608 |
root |
1.45 |
=item counter $seconds |
609 |
|
|
|
610 |
|
|
Like C<again>, but also returns an increasing counter value, starting at |
611 |
|
|
0, which might be useful for some simple animation effects. |
612 |
root |
1.28 |
|
613 |
|
|
=cut |
614 |
|
|
|
615 |
root |
1.45 |
sub now() { urxvt::NOW } |
616 |
|
|
|
617 |
|
|
sub again($) { |
618 |
root |
1.63 |
$frame->[FR_AGAIN]{time} = $_[0]; |
619 |
root |
1.45 |
} |
620 |
|
|
|
621 |
|
|
sub counter($) { |
622 |
root |
1.63 |
$frame->[FR_AGAIN]{time} = $_[0]; |
623 |
|
|
$frame->[FR_STATE]{counter} + 0 |
624 |
root |
1.28 |
} |
625 |
|
|
|
626 |
root |
1.45 |
=back |
627 |
|
|
|
628 |
|
|
=head2 SHAPE CHANGING OPERATORS |
629 |
|
|
|
630 |
|
|
The following operators modify the shape, size or position of the image. |
631 |
|
|
|
632 |
|
|
=over 4 |
633 |
|
|
|
634 |
root |
1.28 |
=item clip $img |
635 |
|
|
|
636 |
|
|
=item clip $width, $height, $img |
637 |
|
|
|
638 |
|
|
=item clip $x, $y, $width, $height, $img |
639 |
|
|
|
640 |
|
|
Clips an image to the given rectangle. If the rectangle is outside the |
641 |
|
|
image area (e.g. when C<$x> or C<$y> are negative) or the rectangle is |
642 |
|
|
larger than the image, then the tiling mode defines how the extra pixels |
643 |
|
|
will be filled. |
644 |
|
|
|
645 |
root |
1.78 |
If C<$x> and C<$y> are missing, then C<0> is assumed for both. |
646 |
root |
1.28 |
|
647 |
|
|
If C<$width> and C<$height> are missing, then the window size will be |
648 |
|
|
assumed. |
649 |
|
|
|
650 |
|
|
Example: load an image, blur it, and clip it to the window size to save |
651 |
|
|
memory. |
652 |
|
|
|
653 |
root |
1.64 |
clip keep { blur 10, load "mybg.png" } |
654 |
root |
1.28 |
|
655 |
|
|
=cut |
656 |
|
|
|
657 |
root |
1.20 |
sub clip($;$$;$$) { |
658 |
root |
1.7 |
my $img = pop; |
659 |
root |
1.30 |
my $h = pop || TH; |
660 |
|
|
my $w = pop || TW; |
661 |
root |
1.21 |
$img->sub_rect ($_[0], $_[1], $w, $h) |
662 |
root |
1.4 |
} |
663 |
|
|
|
664 |
root |
1.28 |
=item scale $img |
665 |
|
|
|
666 |
root |
1.43 |
=item scale $size_factor, $img |
667 |
root |
1.28 |
|
668 |
root |
1.43 |
=item scale $width_factor, $height_factor, $img |
669 |
root |
1.28 |
|
670 |
root |
1.43 |
Scales the image by the given factors in horizontal |
671 |
|
|
(C<$width>) and vertical (C<$height>) direction. |
672 |
root |
1.28 |
|
673 |
sf-exg |
1.81 |
If only one factor is given, it is used for both directions. |
674 |
root |
1.28 |
|
675 |
root |
1.43 |
If no factors are given, scales the image to the window size without |
676 |
root |
1.28 |
keeping aspect. |
677 |
|
|
|
678 |
|
|
=item resize $width, $height, $img |
679 |
|
|
|
680 |
|
|
Resizes the image to exactly C<$width> times C<$height> pixels. |
681 |
|
|
|
682 |
root |
1.43 |
=item fit $img |
683 |
|
|
|
684 |
|
|
=item fit $width, $height, $img |
685 |
|
|
|
686 |
|
|
Fits the image into the given C<$width> and C<$height> without changing |
687 |
|
|
aspect, or the terminal size. That means it will be shrunk or grown until |
688 |
|
|
the whole image fits into the given area, possibly leaving borders. |
689 |
|
|
|
690 |
|
|
=item cover $img |
691 |
|
|
|
692 |
|
|
=item cover $width, $height, $img |
693 |
|
|
|
694 |
|
|
Similar to C<fit>, but shrinks or grows until all of the area is covered |
695 |
|
|
by the image, so instead of potentially leaving borders, it will cut off |
696 |
|
|
image data that doesn't fit. |
697 |
|
|
|
698 |
root |
1.28 |
=cut |
699 |
|
|
|
700 |
root |
1.33 |
sub scale($;$;$) { |
701 |
root |
1.28 |
my $img = pop; |
702 |
|
|
|
703 |
root |
1.43 |
@_ == 2 ? $img->scale ($_[0] * $img->w, $_[1] * $img->h) |
704 |
|
|
: @_ ? $img->scale ($_[0] * $img->w, $_[0] * $img->h) |
705 |
root |
1.30 |
: $img->scale (TW, TH) |
706 |
root |
1.28 |
} |
707 |
|
|
|
708 |
root |
1.2 |
sub resize($$$) { |
709 |
root |
1.7 |
my $img = pop; |
710 |
|
|
$img->scale ($_[0], $_[1]) |
711 |
root |
1.1 |
} |
712 |
|
|
|
713 |
root |
1.43 |
sub fit($;$$) { |
714 |
|
|
my $img = pop; |
715 |
|
|
my $w = ($_[0] || TW) / $img->w; |
716 |
|
|
my $h = ($_[1] || TH) / $img->h; |
717 |
|
|
scale +(min $w, $h), $img |
718 |
|
|
} |
719 |
|
|
|
720 |
|
|
sub cover($;$$) { |
721 |
|
|
my $img = pop; |
722 |
|
|
my $w = ($_[0] || TW) / $img->w; |
723 |
|
|
my $h = ($_[1] || TH) / $img->h; |
724 |
|
|
scale +(max $w, $h), $img |
725 |
|
|
} |
726 |
|
|
|
727 |
root |
1.36 |
=item move $dx, $dy, $img |
728 |
|
|
|
729 |
|
|
Moves the image by C<$dx> pixels in the horizontal, and C<$dy> pixels in |
730 |
|
|
the vertical. |
731 |
|
|
|
732 |
|
|
Example: move the image right by 20 pixels and down by 30. |
733 |
|
|
|
734 |
|
|
move 20, 30, ... |
735 |
|
|
|
736 |
root |
1.46 |
=item align $xalign, $yalign, $img |
737 |
|
|
|
738 |
|
|
Aligns the image according to a factor - C<0> means the image is moved to |
739 |
|
|
the left or top edge (for C<$xalign> or C<$yalign>), C<0.5> means it is |
740 |
|
|
exactly centered and C<1> means it touches the right or bottom edge. |
741 |
|
|
|
742 |
|
|
Example: remove any visible border around an image, center it vertically but move |
743 |
|
|
it to the right hand side. |
744 |
|
|
|
745 |
|
|
align 1, 0.5, pad $img |
746 |
|
|
|
747 |
root |
1.44 |
=item center $img |
748 |
|
|
|
749 |
|
|
=item center $width, $height, $img |
750 |
|
|
|
751 |
|
|
Centers the image, i.e. the center of the image is moved to the center of |
752 |
|
|
the terminal window (or the box specified by C<$width> and C<$height> if |
753 |
|
|
given). |
754 |
|
|
|
755 |
root |
1.46 |
Example: load an image and center it. |
756 |
|
|
|
757 |
root |
1.64 |
center keep { pad load "mybg.png" } |
758 |
root |
1.46 |
|
759 |
root |
1.36 |
=item rootalign $img |
760 |
|
|
|
761 |
|
|
Moves the image so that it appears glued to the screen as opposed to the |
762 |
|
|
window. This gives the illusion of a larger area behind the window. It is |
763 |
|
|
exactly equivalent to C<move -TX, -TY>, that is, it moves the image to the |
764 |
|
|
top left of the screen. |
765 |
|
|
|
766 |
|
|
Example: load a background image, put it in mirror mode and root align it. |
767 |
|
|
|
768 |
root |
1.64 |
rootalign keep { mirror load "mybg.png" } |
769 |
root |
1.36 |
|
770 |
|
|
Example: take the screen background and align it, giving the illusion of |
771 |
|
|
transparency as long as the window isn't in front of other windows. |
772 |
|
|
|
773 |
root |
1.46 |
rootalign root |
774 |
root |
1.36 |
|
775 |
|
|
=cut |
776 |
|
|
|
777 |
root |
1.7 |
sub move($$;$) { |
778 |
root |
1.20 |
my $img = pop->clone; |
779 |
|
|
$img->move ($_[0], $_[1]); |
780 |
|
|
$img |
781 |
root |
1.1 |
} |
782 |
|
|
|
783 |
root |
1.46 |
sub align($;$$) { |
784 |
|
|
my $img = pop; |
785 |
|
|
|
786 |
|
|
move $_[0] * (TW - $img->w), |
787 |
|
|
$_[1] * (TH - $img->h), |
788 |
|
|
$img |
789 |
|
|
} |
790 |
|
|
|
791 |
root |
1.44 |
sub center($;$$) { |
792 |
|
|
my $img = pop; |
793 |
|
|
my $w = $_[0] || TW; |
794 |
root |
1.46 |
my $h = $_[1] || TH; |
795 |
root |
1.44 |
|
796 |
|
|
move 0.5 * ($w - $img->w), 0.5 * ($h - $img->h), $img |
797 |
|
|
} |
798 |
|
|
|
799 |
root |
1.36 |
sub rootalign($) { |
800 |
|
|
move -TX, -TY, $_[0] |
801 |
root |
1.1 |
} |
802 |
|
|
|
803 |
root |
1.64 |
=item rotate $center_x, $center_y, $degrees, $img |
804 |
root |
1.52 |
|
805 |
root |
1.64 |
Rotates the image clockwise by C<$degrees> degrees, around the point at |
806 |
|
|
C<$center_x> and C<$center_y> (specified as factor of image width/height). |
807 |
root |
1.52 |
|
808 |
sf-exg |
1.81 |
Example: rotate the image by 90 degrees around its center. |
809 |
root |
1.52 |
|
810 |
root |
1.64 |
rotate 0.5, 0.5, 90, keep { load "$HOME/mybg.png" } |
811 |
root |
1.52 |
|
812 |
|
|
=cut |
813 |
|
|
|
814 |
root |
1.53 |
sub rotate($$$$) { |
815 |
root |
1.52 |
my $img = pop; |
816 |
|
|
$img->rotate ( |
817 |
root |
1.60 |
$_[0] * ($img->w + $img->x), |
818 |
|
|
$_[1] * ($img->h + $img->y), |
819 |
root |
1.52 |
$_[2] * (3.14159265 / 180), |
820 |
|
|
) |
821 |
|
|
} |
822 |
|
|
|
823 |
root |
1.45 |
=back |
824 |
|
|
|
825 |
|
|
=head2 COLOUR MODIFICATIONS |
826 |
|
|
|
827 |
|
|
The following operators change the pixels of the image. |
828 |
|
|
|
829 |
|
|
=over 4 |
830 |
|
|
|
831 |
root |
1.70 |
=item tint $color, $img |
832 |
|
|
|
833 |
|
|
Tints the image in the given colour. |
834 |
|
|
|
835 |
|
|
Example: tint the image red. |
836 |
|
|
|
837 |
|
|
tint "red", load "rgb.png" |
838 |
|
|
|
839 |
|
|
Example: the same, but specify the colour by component. |
840 |
|
|
|
841 |
|
|
tint [1, 0, 0], load "rgb.png" |
842 |
|
|
|
843 |
|
|
=cut |
844 |
|
|
|
845 |
|
|
sub tint($$) { |
846 |
|
|
$_[1]->tint ($_[0]) |
847 |
|
|
} |
848 |
|
|
|
849 |
sf-exg |
1.82 |
=item shade $factor, $img |
850 |
|
|
|
851 |
|
|
Shade the image by the given factor. |
852 |
|
|
|
853 |
|
|
=cut |
854 |
|
|
|
855 |
|
|
sub shade($$) { |
856 |
|
|
$_[1]->shade ($_[0]) |
857 |
|
|
} |
858 |
|
|
|
859 |
root |
1.36 |
=item contrast $factor, $img |
860 |
|
|
|
861 |
|
|
=item contrast $r, $g, $b, $img |
862 |
|
|
|
863 |
|
|
=item contrast $r, $g, $b, $a, $img |
864 |
|
|
|
865 |
|
|
Adjusts the I<contrast> of an image. |
866 |
|
|
|
867 |
root |
1.45 |
The first form applies a single C<$factor> to red, green and blue, the |
868 |
|
|
second form applies separate factors to each colour channel, and the last |
869 |
|
|
form includes the alpha channel. |
870 |
|
|
|
871 |
|
|
Values from 0 to 1 lower the contrast, values higher than 1 increase the |
872 |
|
|
contrast. |
873 |
|
|
|
874 |
|
|
Due to limitations in the underlying XRender extension, lowering contrast |
875 |
|
|
also reduces brightness, while increasing contrast currently also |
876 |
|
|
increases brightness. |
877 |
root |
1.38 |
|
878 |
root |
1.45 |
=item brightness $bias, $img |
879 |
root |
1.36 |
|
880 |
|
|
=item brightness $r, $g, $b, $img |
881 |
|
|
|
882 |
|
|
=item brightness $r, $g, $b, $a, $img |
883 |
|
|
|
884 |
root |
1.38 |
Adjusts the brightness of an image. |
885 |
|
|
|
886 |
root |
1.45 |
The first form applies a single C<$bias> to red, green and blue, the |
887 |
|
|
second form applies separate biases to each colour channel, and the last |
888 |
|
|
form includes the alpha channel. |
889 |
|
|
|
890 |
|
|
Values less than 0 reduce brightness, while values larger than 0 increase |
891 |
|
|
it. Useful range is from -1 to 1 - the former results in a black, the |
892 |
|
|
latter in a white picture. |
893 |
|
|
|
894 |
sf-exg |
1.51 |
Due to idiosyncrasies in the underlying XRender extension, biases less |
895 |
root |
1.45 |
than zero can be I<very> slow. |
896 |
|
|
|
897 |
root |
1.75 |
You can also try the experimental(!) C<muladd> operator. |
898 |
|
|
|
899 |
root |
1.36 |
=cut |
900 |
root |
1.1 |
|
901 |
root |
1.2 |
sub contrast($$;$$;$) { |
902 |
root |
1.7 |
my $img = pop; |
903 |
|
|
my ($r, $g, $b, $a) = @_; |
904 |
root |
1.4 |
|
905 |
root |
1.49 |
($g, $b) = ($r, $r) if @_ < 3; |
906 |
|
|
$a = 1 if @_ < 4; |
907 |
root |
1.4 |
|
908 |
root |
1.1 |
$img = $img->clone; |
909 |
root |
1.37 |
$img->contrast ($r, $g, $b, $a); |
910 |
root |
1.1 |
$img |
911 |
|
|
} |
912 |
|
|
|
913 |
root |
1.2 |
sub brightness($$;$$;$) { |
914 |
root |
1.7 |
my $img = pop; |
915 |
|
|
my ($r, $g, $b, $a) = @_; |
916 |
root |
1.4 |
|
917 |
root |
1.49 |
($g, $b) = ($r, $r) if @_ < 3; |
918 |
|
|
$a = 1 if @_ < 4; |
919 |
root |
1.4 |
|
920 |
root |
1.1 |
$img = $img->clone; |
921 |
|
|
$img->brightness ($r, $g, $b, $a); |
922 |
|
|
$img |
923 |
|
|
} |
924 |
|
|
|
925 |
root |
1.75 |
=item muladd $mul, $add, $img # EXPERIMENTAL |
926 |
|
|
|
927 |
sf-exg |
1.80 |
First multiplies the pixels by C<$mul>, then adds C<$add>. This can be used |
928 |
root |
1.75 |
to implement brightness and contrast at the same time, with a wider value |
929 |
|
|
range than contrast and brightness operators. |
930 |
|
|
|
931 |
|
|
Due to numerous bugs in XRender implementations, it can also introduce a |
932 |
|
|
number of visual artifacts. |
933 |
|
|
|
934 |
|
|
Example: increase contrast by a factor of C<$c> without changing image |
935 |
|
|
brightness too much. |
936 |
|
|
|
937 |
|
|
muladd $c, (1 - $c) * 0.5, $img |
938 |
|
|
|
939 |
|
|
=cut |
940 |
|
|
|
941 |
|
|
sub muladd($$$) { |
942 |
|
|
$_[2]->muladd ($_[0], $_[1]) |
943 |
|
|
} |
944 |
|
|
|
945 |
root |
1.38 |
=item blur $radius, $img |
946 |
|
|
|
947 |
|
|
=item blur $radius_horz, $radius_vert, $img |
948 |
|
|
|
949 |
|
|
Gaussian-blurs the image with (roughly) C<$radius> pixel radius. The radii |
950 |
|
|
can also be specified separately. |
951 |
|
|
|
952 |
root |
1.39 |
Blurring is often I<very> slow, at least compared or other |
953 |
|
|
operators. Larger blur radii are slower than smaller ones, too, so if you |
954 |
|
|
don't want to freeze your screen for long times, start experimenting with |
955 |
|
|
low values for radius (<5). |
956 |
|
|
|
957 |
root |
1.38 |
=cut |
958 |
|
|
|
959 |
root |
1.36 |
sub blur($$;$) { |
960 |
|
|
my $img = pop; |
961 |
|
|
$img->blur ($_[0], @_ >= 2 ? $_[1] : $_[0]) |
962 |
|
|
} |
963 |
|
|
|
964 |
root |
1.84 |
=item focus_fade $img |
965 |
|
|
|
966 |
|
|
=item focus_fade $factor, $img |
967 |
|
|
|
968 |
|
|
=item focus_fade $factor, $color, $img |
969 |
|
|
|
970 |
|
|
Fades the image by the given factor (and colour) when focus is lost (the |
971 |
root |
1.85 |
same as the C<-fade>/C<-fadecolor> command line options, which also supply |
972 |
root |
1.84 |
the default values for C<factor> and C<$color>. Unlike with C<-fade>, the |
973 |
sf-exg |
1.87 |
C<$factor> is a real value, not a percentage value (that is, 0..1, not |
974 |
root |
1.84 |
0..100). |
975 |
|
|
|
976 |
|
|
Example: do the right thing when focus fading is requested. |
977 |
|
|
|
978 |
|
|
focus_fade load "mybg.jpg"; |
979 |
|
|
|
980 |
|
|
=cut |
981 |
|
|
|
982 |
|
|
sub focus_fade($;$$) { |
983 |
|
|
my $img = pop; |
984 |
|
|
|
985 |
|
|
return $img |
986 |
|
|
if FOCUS; |
987 |
|
|
|
988 |
|
|
my $fade = @_ >= 1 ? $_[0] : defined $self->resource ("fade") ? $self->resource ("fade") * 0.01 : 0; |
989 |
|
|
my $color = @_ >= 2 ? $_[1] : $self->resource ("color+" . urxvt::Color_fade); |
990 |
|
|
|
991 |
|
|
$img = $img->tint ($color) if $color ne "rgb:00/00/00"; |
992 |
|
|
$img = $img->muladd (1 - $fade, 0) if $fade; |
993 |
|
|
|
994 |
|
|
$img |
995 |
|
|
} |
996 |
|
|
|
997 |
root |
1.52 |
=back |
998 |
|
|
|
999 |
|
|
=head2 OTHER STUFF |
1000 |
root |
1.38 |
|
1001 |
root |
1.56 |
Anything that didn't fit any of the other categories, even after applying |
1002 |
root |
1.52 |
force and closing our eyes. |
1003 |
|
|
|
1004 |
|
|
=over 4 |
1005 |
|
|
|
1006 |
root |
1.66 |
=item keep { ... } |
1007 |
root |
1.52 |
|
1008 |
root |
1.66 |
This operator takes a code block as argument, that is, one or more |
1009 |
root |
1.52 |
statements enclosed by braces. |
1010 |
|
|
|
1011 |
root |
1.68 |
The trick is that this code block is only evaluated when the outcome |
1012 |
|
|
changes - on other calls the C<keep> simply returns the image it computed |
1013 |
|
|
previously (yes, it should only be used with images). Or in other words, |
1014 |
|
|
C<keep> I<caches> the result of the code block so it doesn't need to be |
1015 |
|
|
computed again. |
1016 |
|
|
|
1017 |
|
|
This can be extremely useful to avoid redoing slow operations - for |
1018 |
|
|
example, if your background expression takes the root background, blurs it |
1019 |
|
|
and then root-aligns it it would have to blur the root background on every |
1020 |
|
|
window move or resize. |
1021 |
|
|
|
1022 |
|
|
Another example is C<load>, which can be quite slow. |
1023 |
root |
1.52 |
|
1024 |
root |
1.63 |
In fact, urxvt itself encloses the whole expression in some kind of |
1025 |
root |
1.68 |
C<keep> block so it only is reevaluated as required. |
1026 |
root |
1.63 |
|
1027 |
root |
1.68 |
Putting the blur into a C<keep> block will make sure the blur is only done |
1028 |
|
|
once, while the C<rootalign> is still done each time the window moves. |
1029 |
root |
1.52 |
|
1030 |
sf-exg |
1.73 |
rootalign keep { blur 10, root } |
1031 |
root |
1.52 |
|
1032 |
root |
1.63 |
This leaves the question of how to force reevaluation of the block, |
1033 |
|
|
in case the root background changes: If expression inside the block |
1034 |
|
|
is sensitive to some event (root background changes, window geometry |
1035 |
|
|
changes), then it will be reevaluated automatically as needed. |
1036 |
root |
1.38 |
|
1037 |
sf-exg |
1.92 |
=back |
1038 |
|
|
|
1039 |
|
|
=head1 OLD BACKGROUND IMAGE SETTINGS |
1040 |
|
|
|
1041 |
|
|
This extension also provides support for the old options/resources and |
1042 |
|
|
OSC sequences for setting a background image. These settings are |
1043 |
|
|
B<deprecated> and will be removed in future versions. |
1044 |
|
|
|
1045 |
|
|
=head2 OPTIONS AND RESOURCES |
1046 |
|
|
|
1047 |
|
|
=over 4 |
1048 |
|
|
|
1049 |
|
|
=item B<-pixmap> I<file[;oplist]> |
1050 |
|
|
|
1051 |
|
|
=item B<backgroundPixmap:> I<file[;oplist]> |
1052 |
|
|
|
1053 |
|
|
Use the specified image file as the window's background and also |
1054 |
|
|
optionally specify a colon separated list of operations to modify it. |
1055 |
|
|
Note that you may need to quote the C<;> character when using the |
1056 |
|
|
command line option, as C<;> is usually a metacharacter in shells. |
1057 |
|
|
Supported operations are: |
1058 |
|
|
|
1059 |
|
|
=over 4 |
1060 |
|
|
|
1061 |
|
|
=item B<WxH+X+Y> |
1062 |
|
|
|
1063 |
|
|
sets scale and position. B<"W" / "H"> specify the horizontal/vertical |
1064 |
|
|
scale (percent), and B<"X" / "Y"> locate the image centre (percent). A |
1065 |
|
|
scale of 0 disables scaling. |
1066 |
|
|
|
1067 |
|
|
=item B<op=tile> |
1068 |
|
|
|
1069 |
|
|
enables tiling |
1070 |
|
|
|
1071 |
|
|
=item B<op=keep-aspect> |
1072 |
|
|
|
1073 |
|
|
maintain the image aspect ratio when scaling |
1074 |
|
|
|
1075 |
|
|
=item B<op=root-align> |
1076 |
|
|
|
1077 |
|
|
use the position of the terminal window relative to the root window as |
1078 |
|
|
the image offset, simulating a root window background |
1079 |
|
|
|
1080 |
|
|
=back |
1081 |
|
|
|
1082 |
|
|
The default scale and position setting is C<100x100+50+50>. |
1083 |
|
|
Alternatively, a predefined set of templates can be used to achieve |
1084 |
|
|
the most common setups: |
1085 |
|
|
|
1086 |
|
|
=over 4 |
1087 |
|
|
|
1088 |
|
|
=item B<style=tiled> |
1089 |
|
|
|
1090 |
|
|
the image is tiled with no scaling. Equivalent to 0x0+0+0:op=tile |
1091 |
|
|
|
1092 |
|
|
=item B<style=aspect-stretched> |
1093 |
|
|
|
1094 |
|
|
the image is scaled to fill the whole window maintaining the aspect |
1095 |
|
|
ratio and centered. Equivalent to 100x100+50+50:op=keep-aspect |
1096 |
|
|
|
1097 |
|
|
=item B<style=stretched> |
1098 |
|
|
|
1099 |
|
|
the image is scaled to fill the whole window. Equivalent to 100x100 |
1100 |
|
|
|
1101 |
|
|
=item B<style=centered> |
1102 |
|
|
|
1103 |
|
|
the image is centered with no scaling. Equivalent to 0x0+50+50 |
1104 |
|
|
|
1105 |
|
|
=item B<style=root-tiled> |
1106 |
|
|
|
1107 |
|
|
the image is tiled with no scaling and using 'root' positioning. |
1108 |
|
|
Equivalent to 0x0:op=tile:op=root-align |
1109 |
|
|
|
1110 |
|
|
=back |
1111 |
|
|
|
1112 |
|
|
If multiple templates are specified the last one wins. Note that a |
1113 |
|
|
template overrides all the scale, position and operations settings. |
1114 |
|
|
|
1115 |
|
|
If used in conjunction with pseudo-transparency, the specified image |
1116 |
|
|
will be blended over the transparent background using alpha-blending. |
1117 |
|
|
|
1118 |
|
|
=item B<-tr>|B<+tr> |
1119 |
|
|
|
1120 |
|
|
=item B<transparent:> I<boolean> |
1121 |
|
|
|
1122 |
|
|
Turn on/off pseudo-transparency by using the root pixmap as background. |
1123 |
|
|
|
1124 |
|
|
=item B<-tint> I<colour> |
1125 |
|
|
|
1126 |
|
|
=item B<tintColor:> I<colour> |
1127 |
|
|
|
1128 |
|
|
Tint the transparent background with the given colour. Note that a |
1129 |
|
|
black tint yields a completely black image while a white tint yields |
1130 |
|
|
the image unchanged. |
1131 |
|
|
|
1132 |
|
|
=item B<-sh> I<number> |
1133 |
|
|
|
1134 |
|
|
=item B<shading:> I<number> |
1135 |
|
|
|
1136 |
|
|
Darken (0 .. 99) or lighten (101 .. 200) the transparent background. |
1137 |
|
|
A value of 100 means no shading. |
1138 |
|
|
|
1139 |
|
|
=item B<-blr> I<HxV> |
1140 |
|
|
|
1141 |
|
|
=item B<blurRadius:> I<HxV> |
1142 |
|
|
|
1143 |
|
|
Apply gaussian blur with the specified radius to the transparent |
1144 |
|
|
background. If a single number is specified, the vertical and |
1145 |
|
|
horizontal radii are considered to be the same. Setting one of the |
1146 |
|
|
radii to 1 and the other to a large number creates interesting effects |
1147 |
|
|
on some backgrounds. The maximum radius value is 128. An horizontal or |
1148 |
|
|
vertical radius of 0 disables blurring. |
1149 |
|
|
|
1150 |
|
|
=back |
1151 |
|
|
|
1152 |
|
|
=head2 OSC sequences |
1153 |
|
|
|
1154 |
|
|
=over 4 |
1155 |
|
|
|
1156 |
|
|
=item B<< C<ESC ] 705 ; Pt ST> >> Change transparent background tint colour to B<< C<Pt> >>. |
1157 |
|
|
|
1158 |
|
|
=item B<< C<ESC ] 20 ; Pt ST> >> Change/Query background image |
1159 |
|
|
parameters: the value of B<< C<Pt> >> can be one of the following |
1160 |
|
|
commands: |
1161 |
|
|
|
1162 |
|
|
=over 4 |
1163 |
|
|
|
1164 |
|
|
=item B<< C<?> >> |
1165 |
|
|
|
1166 |
|
|
display scale and position in the title |
1167 |
|
|
|
1168 |
|
|
=item B<< C<;WxH+X+Y> >> |
1169 |
|
|
|
1170 |
|
|
change scale and/or position |
1171 |
|
|
|
1172 |
|
|
=item B<< C<FILE;WxH+X+Y> >> |
1173 |
|
|
|
1174 |
|
|
change background image |
1175 |
|
|
|
1176 |
|
|
=back |
1177 |
|
|
|
1178 |
root |
1.38 |
=cut |
1179 |
|
|
|
1180 |
root |
1.68 |
sub keep(&) { |
1181 |
root |
1.63 |
my $id = $_[0]+0; |
1182 |
|
|
|
1183 |
|
|
local $frame = $self->{frame_cache}{$id} ||= [$frame]; |
1184 |
|
|
|
1185 |
|
|
unless ($frame->[FR_CACHE]) { |
1186 |
|
|
$frame->[FR_CACHE] = [ $_[0]() ]; |
1187 |
|
|
|
1188 |
|
|
my $self = $self; |
1189 |
|
|
my $frame = $frame; |
1190 |
|
|
Scalar::Util::weaken $frame; |
1191 |
|
|
$self->compile_frame ($frame, sub { |
1192 |
|
|
# clear this frame cache, also for all parents |
1193 |
|
|
for (my $frame = $frame; $frame; $frame = $frame->[0]) { |
1194 |
|
|
undef $frame->[FR_CACHE]; |
1195 |
|
|
} |
1196 |
|
|
|
1197 |
|
|
$self->recalculate; |
1198 |
|
|
}); |
1199 |
root |
1.55 |
}; |
1200 |
|
|
|
1201 |
|
|
# in scalar context we always return the first original result, which |
1202 |
|
|
# is not quite how perl works. |
1203 |
|
|
wantarray |
1204 |
root |
1.63 |
? @{ $frame->[FR_CACHE] } |
1205 |
|
|
: $frame->[FR_CACHE][0] |
1206 |
root |
1.52 |
} |
1207 |
|
|
|
1208 |
root |
1.68 |
# sub keep_clear() { |
1209 |
|
|
# delete $self->{frame_cache}; |
1210 |
|
|
# } |
1211 |
root |
1.36 |
|
1212 |
root |
1.15 |
=back |
1213 |
|
|
|
1214 |
|
|
=cut |
1215 |
|
|
|
1216 |
root |
1.1 |
} |
1217 |
|
|
|
1218 |
|
|
sub parse_expr { |
1219 |
root |
1.63 |
my $expr = eval |
1220 |
|
|
"sub {\n" |
1221 |
|
|
. "package urxvt::bgdsl;\n" |
1222 |
|
|
. "#line 0 'background expression'\n" |
1223 |
|
|
. "$_[0]\n" |
1224 |
|
|
. "}"; |
1225 |
root |
1.1 |
die if $@; |
1226 |
|
|
$expr |
1227 |
|
|
} |
1228 |
|
|
|
1229 |
|
|
# compiles a parsed expression |
1230 |
|
|
sub set_expr { |
1231 |
|
|
my ($self, $expr) = @_; |
1232 |
|
|
|
1233 |
root |
1.74 |
$self->{root} = []; # the outermost frame |
1234 |
root |
1.1 |
$self->{expr} = $expr; |
1235 |
|
|
$self->recalculate; |
1236 |
|
|
} |
1237 |
|
|
|
1238 |
root |
1.63 |
# takes a hash of sensitivity indicators and installs watchers |
1239 |
|
|
sub compile_frame { |
1240 |
|
|
my ($self, $frame, $cb) = @_; |
1241 |
|
|
|
1242 |
|
|
my $state = $frame->[urxvt::bgdsl::FR_STATE] ||= {}; |
1243 |
|
|
my $again = $frame->[urxvt::bgdsl::FR_AGAIN]; |
1244 |
|
|
|
1245 |
|
|
# don't keep stuff alive |
1246 |
|
|
Scalar::Util::weaken $state; |
1247 |
|
|
|
1248 |
|
|
if ($again->{nested}) { |
1249 |
|
|
$state->{nested} = 1; |
1250 |
|
|
} else { |
1251 |
|
|
delete $state->{nested}; |
1252 |
|
|
} |
1253 |
|
|
|
1254 |
|
|
if (my $interval = $again->{time}) { |
1255 |
|
|
$state->{time} = [$interval, urxvt::timer->new->after ($interval)->interval ($interval)] |
1256 |
|
|
if $state->{time}[0] != $interval; |
1257 |
|
|
|
1258 |
|
|
# callback *might* have changed, although we could just rule that out |
1259 |
|
|
$state->{time}[1]->cb (sub { |
1260 |
|
|
++$state->{counter}; |
1261 |
|
|
$cb->(); |
1262 |
|
|
}); |
1263 |
|
|
} else { |
1264 |
|
|
delete $state->{time}; |
1265 |
|
|
} |
1266 |
|
|
|
1267 |
|
|
if ($again->{position}) { |
1268 |
|
|
$state->{position} = $self->on (position_change => $cb); |
1269 |
|
|
} else { |
1270 |
|
|
delete $state->{position}; |
1271 |
|
|
} |
1272 |
|
|
|
1273 |
|
|
if ($again->{size}) { |
1274 |
|
|
$state->{size} = $self->on (size_change => $cb); |
1275 |
|
|
} else { |
1276 |
|
|
delete $state->{size}; |
1277 |
|
|
} |
1278 |
|
|
|
1279 |
|
|
if ($again->{rootpmap}) { |
1280 |
|
|
$state->{rootpmap} = $self->on (rootpmap_change => $cb); |
1281 |
|
|
} else { |
1282 |
|
|
delete $state->{rootpmap}; |
1283 |
|
|
} |
1284 |
root |
1.84 |
|
1285 |
|
|
if ($again->{focus}) { |
1286 |
|
|
$state->{focus} = $self->on (focus_in => $cb, focus_out => $cb); |
1287 |
|
|
} else { |
1288 |
|
|
delete $state->{focus}; |
1289 |
|
|
} |
1290 |
root |
1.63 |
} |
1291 |
|
|
|
1292 |
root |
1.1 |
# evaluate the current bg expression |
1293 |
|
|
sub recalculate { |
1294 |
root |
1.33 |
my ($arg_self) = @_; |
1295 |
root |
1.1 |
|
1296 |
root |
1.10 |
# rate limit evaluation |
1297 |
|
|
|
1298 |
root |
1.33 |
if ($arg_self->{next_refresh} > urxvt::NOW) { |
1299 |
|
|
$arg_self->{next_refresh_timer} = urxvt::timer->new->after ($arg_self->{next_refresh} - urxvt::NOW)->cb (sub { |
1300 |
|
|
$arg_self->recalculate; |
1301 |
root |
1.9 |
}); |
1302 |
root |
1.12 |
return; |
1303 |
root |
1.9 |
} |
1304 |
|
|
|
1305 |
root |
1.33 |
$arg_self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL; |
1306 |
root |
1.9 |
|
1307 |
root |
1.10 |
# set environment to evaluate user expression |
1308 |
root |
1.6 |
|
1309 |
root |
1.63 |
local $self = $arg_self; |
1310 |
|
|
local $HOME = $ENV{HOME}; |
1311 |
root |
1.74 |
local $frame = $self->{root}; |
1312 |
root |
1.1 |
|
1313 |
root |
1.63 |
($x, $y, $w, $h) = $self->background_geometry ($self->{border}); |
1314 |
root |
1.84 |
$focus = $self->focus; |
1315 |
root |
1.22 |
|
1316 |
root |
1.10 |
# evaluate user expression |
1317 |
|
|
|
1318 |
root |
1.63 |
my @img = eval { $self->{expr}->() }; |
1319 |
root |
1.61 |
die $@ if $@; |
1320 |
root |
1.63 |
die "background-expr did not return anything.\n" unless @img; |
1321 |
|
|
die "background-expr: expected image(s), got something else.\n" |
1322 |
|
|
if grep { !UNIVERSAL::isa $_, "urxvt::img" } @img; |
1323 |
root |
1.1 |
|
1324 |
root |
1.63 |
my $img = urxvt::bgdsl::merge @img; |
1325 |
root |
1.10 |
|
1326 |
root |
1.63 |
$frame->[FR_AGAIN]{size} = 1 |
1327 |
root |
1.55 |
if $img->repeat_mode != urxvt::RepeatNormal; |
1328 |
|
|
|
1329 |
root |
1.63 |
# if the expression is sensitive to external events, prepare reevaluation then |
1330 |
|
|
$self->compile_frame ($frame, sub { $arg_self->recalculate }); |
1331 |
root |
1.9 |
|
1332 |
root |
1.10 |
# clear stuff we no longer need |
1333 |
|
|
|
1334 |
root |
1.63 |
# unless (%{ $frame->[FR_STATE] }) { |
1335 |
|
|
# delete $self->{state}; |
1336 |
|
|
# delete $self->{expr}; |
1337 |
|
|
# } |
1338 |
root |
1.5 |
|
1339 |
root |
1.34 |
# set background pixmap |
1340 |
root |
1.1 |
|
1341 |
root |
1.33 |
$self->set_background ($img, $self->{border}); |
1342 |
root |
1.89 |
$self->scr_recolor (0); |
1343 |
root |
1.1 |
$self->want_refresh; |
1344 |
|
|
} |
1345 |
|
|
|
1346 |
sf-exg |
1.92 |
sub old_bg_opts { |
1347 |
|
|
my ($self, $arg) = @_; |
1348 |
|
|
|
1349 |
|
|
$arg or return; |
1350 |
|
|
|
1351 |
|
|
my @str = split /;/, $arg; |
1352 |
|
|
|
1353 |
|
|
return unless $str[0] or $self->{bg_opts}->{path}; |
1354 |
|
|
|
1355 |
|
|
my $bg_opts = $self->{bg_opts}; |
1356 |
|
|
|
1357 |
|
|
if ($str[0]) { |
1358 |
|
|
$bg_opts->{tile} = 0; |
1359 |
|
|
$bg_opts->{keep_aspect} = 0; |
1360 |
|
|
$bg_opts->{root_align} = 0; |
1361 |
|
|
$bg_opts->{h_scale} = $bg_opts->{v_scale} = 100; |
1362 |
|
|
$bg_opts->{h_align} = $bg_opts->{v_align} = 50; |
1363 |
|
|
$bg_opts->{path} = unpack "H*", $str[0]; |
1364 |
|
|
} |
1365 |
|
|
|
1366 |
|
|
my @oplist = split /:/, $str[1]; |
1367 |
|
|
|
1368 |
|
|
for (@oplist) { |
1369 |
|
|
if (/style=tiled/i) { |
1370 |
|
|
$bg_opts->{tile} = 1; |
1371 |
|
|
$bg_opts->{keep_aspect} = 0; |
1372 |
|
|
$bg_opts->{root_align} = 0; |
1373 |
|
|
$bg_opts->{h_scale} = $bg_opts->{v_scale} = 0; |
1374 |
|
|
$bg_opts->{h_align} = $bg_opts->{v_align} = 0; |
1375 |
|
|
} elsif (/style=aspect-stretched/i) { |
1376 |
|
|
$bg_opts->{tile} = 0; |
1377 |
|
|
$bg_opts->{keep_aspect} = 1; |
1378 |
|
|
$bg_opts->{root_align} = 0; |
1379 |
|
|
$bg_opts->{h_scale} = $bg_opts->{v_scale} = 100; |
1380 |
|
|
$bg_opts->{h_align} = $bg_opts->{v_align} = 50; |
1381 |
|
|
} elsif (/style=stretched/i) { |
1382 |
|
|
$bg_opts->{tile} = 0; |
1383 |
|
|
$bg_opts->{keep_aspect} = 0; |
1384 |
|
|
$bg_opts->{root_align} = 0; |
1385 |
|
|
$bg_opts->{h_scale} = $bg_opts->{v_scale} = 100; |
1386 |
|
|
$bg_opts->{h_align} = $bg_opts->{v_align} = 50; |
1387 |
|
|
} elsif (/style=centered/i) { |
1388 |
|
|
$bg_opts->{tile} = 0; |
1389 |
|
|
$bg_opts->{keep_aspect} = 0; |
1390 |
|
|
$bg_opts->{root_align} = 0; |
1391 |
|
|
$bg_opts->{h_scale} = $bg_opts->{v_scale} = 0; |
1392 |
|
|
$bg_opts->{h_align} = $bg_opts->{v_align} = 50; |
1393 |
|
|
} elsif (/style=root-tiled/i) { |
1394 |
|
|
$bg_opts->{tile} = 1; |
1395 |
|
|
$bg_opts->{keep_aspect} = 0; |
1396 |
|
|
$bg_opts->{root_align} = 1; |
1397 |
|
|
$bg_opts->{h_scale} = $bg_opts->{v_scale} = 0; |
1398 |
|
|
$bg_opts->{h_align} = $bg_opts->{v_align} = 0; |
1399 |
|
|
} elsif (/op=tile/i) { |
1400 |
|
|
$bg_opts->{tile} = 1; |
1401 |
|
|
} elsif (/op=keep_aspect/i) { |
1402 |
|
|
$bg_opts->{keep_aspect} = 1; |
1403 |
|
|
} elsif (/op=root_align/i) { |
1404 |
|
|
$bg_opts->{root_align} = 1; |
1405 |
|
|
} elsif (/^ =? ([0-9]+)? (?:[xX] ([0-9]+))? ([+-][0-9]+)? ([+-][0-9]+)? $/x) { |
1406 |
|
|
my ($w, $h, $x, $y) = ($1, $2, $3, $4); |
1407 |
|
|
|
1408 |
|
|
if ($str[0]) { |
1409 |
|
|
$w = $h unless defined $w; |
1410 |
|
|
$h = $w unless defined $h; |
1411 |
|
|
$y = $x unless defined $y; |
1412 |
|
|
} |
1413 |
|
|
|
1414 |
|
|
$bg_opts->{h_scale} = $w if defined $w; |
1415 |
|
|
$bg_opts->{v_scale} = $h if defined $h; |
1416 |
|
|
$bg_opts->{h_align} = $x if defined $x; |
1417 |
|
|
$bg_opts->{v_align} = $y if defined $y; |
1418 |
|
|
} |
1419 |
|
|
} |
1420 |
|
|
} |
1421 |
|
|
|
1422 |
|
|
sub old_bg_expr { |
1423 |
|
|
my ($self) = @_; |
1424 |
|
|
|
1425 |
|
|
my $expr; |
1426 |
|
|
|
1427 |
|
|
my $bg_opts = $self->{bg_opts}; |
1428 |
|
|
|
1429 |
|
|
if ($bg_opts->{root}) { |
1430 |
|
|
$expr .= "tile ("; |
1431 |
|
|
|
1432 |
|
|
my $shade = $bg_opts->{shade}; |
1433 |
|
|
|
1434 |
|
|
if ($shade) { |
1435 |
|
|
$shade = List::Util::min $shade, 200; |
1436 |
|
|
$shade = List::Util::max $shade, -100; |
1437 |
|
|
$shade = 200 - (100 + $shade) if $shade < 0; |
1438 |
|
|
|
1439 |
|
|
$shade = $shade * 0.01 - 1; |
1440 |
|
|
$expr .= "shade $shade, "; |
1441 |
|
|
} |
1442 |
|
|
|
1443 |
|
|
my $tint = $bg_opts->{tint}; |
1444 |
|
|
|
1445 |
|
|
if ($tint) { |
1446 |
|
|
$expr .= "tint $tint, "; |
1447 |
|
|
} |
1448 |
|
|
|
1449 |
|
|
my $blur = $bg_opts->{blur}; |
1450 |
|
|
|
1451 |
|
|
if ($blur and $blur =~ /^ =? ([0-9]+)? (?:[xX] ([0-9]+))? $/x) { |
1452 |
|
|
my $hr = defined $1 ? $1 : 1; |
1453 |
|
|
my $vr = defined $2 ? $2 : $hr; |
1454 |
|
|
|
1455 |
|
|
if ($hr != 0 and $vr != 0) { |
1456 |
|
|
$expr .= "blur $hr, $vr, "; |
1457 |
|
|
} |
1458 |
|
|
} |
1459 |
|
|
|
1460 |
|
|
$expr .= "rootalign root)"; |
1461 |
|
|
} |
1462 |
|
|
|
1463 |
|
|
if ($bg_opts->{path}) { |
1464 |
|
|
my $file_expr; |
1465 |
|
|
my $h_scale = $bg_opts->{h_scale} * 0.01; |
1466 |
|
|
my $v_scale = $bg_opts->{v_scale} * 0.01; |
1467 |
|
|
my $h_align = $bg_opts->{h_align} * 0.01; |
1468 |
|
|
my $v_align = $bg_opts->{v_align} * 0.01; |
1469 |
|
|
|
1470 |
|
|
if (!$bg_opts->{tile}) { |
1471 |
|
|
$file_expr .= "pad ("; |
1472 |
|
|
} else { |
1473 |
|
|
$file_expr .= "tile ("; |
1474 |
|
|
} |
1475 |
|
|
|
1476 |
|
|
if ($bg_opts->{root_align}) { |
1477 |
|
|
$file_expr .= "rootalign "; |
1478 |
|
|
} else { |
1479 |
|
|
$file_expr .= "align $h_align, $v_align, "; |
1480 |
|
|
} |
1481 |
|
|
|
1482 |
|
|
if ($h_scale != 0 and $v_scale != 0) { |
1483 |
|
|
my $op = $bg_opts->{keep_aspect} ? "fit" : "resize"; |
1484 |
|
|
$file_expr .= "$op TW * $h_scale, TH * $v_scale, "; |
1485 |
|
|
} |
1486 |
|
|
|
1487 |
|
|
$file_expr .= "keep { load pack \"H*\", \"$bg_opts->{path}\" })"; |
1488 |
|
|
|
1489 |
|
|
if ($expr) { |
1490 |
|
|
$expr .= ", tint (\"[50]white\", $file_expr)"; |
1491 |
|
|
} else { |
1492 |
|
|
$expr = $file_expr; |
1493 |
|
|
} |
1494 |
|
|
} |
1495 |
|
|
|
1496 |
|
|
$expr |
1497 |
|
|
} |
1498 |
|
|
|
1499 |
|
|
sub on_osc_seq { |
1500 |
|
|
my ($self, $op, $arg) = @_; |
1501 |
|
|
|
1502 |
|
|
$self->{bg_opts} or return; |
1503 |
|
|
|
1504 |
|
|
$op =~ /^(20|705)$/ or return; |
1505 |
|
|
|
1506 |
|
|
if ($op eq "20") { |
1507 |
|
|
if ($arg eq "?") { |
1508 |
|
|
my $h_scale = $self->{bg_opts}->{h_scale}; |
1509 |
|
|
my $v_scale = $self->{bg_opts}->{v_scale}; |
1510 |
|
|
my $h_align = $self->{bg_opts}->{h_align}; |
1511 |
|
|
my $v_align = $self->{bg_opts}->{v_align}; |
1512 |
|
|
$self->cmd_parse ("\033]2;[${h_scale}x${v_scale}+${h_align}+${v_align}]\007"); |
1513 |
|
|
} else { |
1514 |
|
|
$self->old_bg_opts ($arg); |
1515 |
|
|
my $expr = $self->old_bg_expr; |
1516 |
|
|
$self->set_expr (parse_expr $expr) if $expr; |
1517 |
|
|
} |
1518 |
|
|
} elsif ($op eq "705") { |
1519 |
|
|
$self->{bg_opts}->{tint} = $arg; |
1520 |
|
|
my $expr = $self->old_bg_expr; |
1521 |
|
|
$self->set_expr (parse_expr $expr) if $expr; |
1522 |
|
|
} |
1523 |
|
|
|
1524 |
|
|
1 |
1525 |
|
|
} |
1526 |
|
|
|
1527 |
|
|
sub find_resource { |
1528 |
|
|
my ($self, $a, $b) = @_; |
1529 |
|
|
|
1530 |
|
|
my $v = $self->x_resource ($a); |
1531 |
|
|
$v = $self->x_resource ($b) unless defined $v; |
1532 |
|
|
|
1533 |
|
|
$v |
1534 |
|
|
} |
1535 |
|
|
|
1536 |
root |
1.1 |
sub on_start { |
1537 |
|
|
my ($self) = @_; |
1538 |
|
|
|
1539 |
sf-exg |
1.92 |
my $expr = $self->x_resource ("%.expr"); |
1540 |
|
|
|
1541 |
|
|
if (!$expr) { |
1542 |
|
|
$self->{bg_opts} = { h_scale => 100, v_scale => 100, |
1543 |
|
|
h_align => 50, v_align => 50 }; |
1544 |
|
|
|
1545 |
|
|
$self->{bg_opts}->{shade} = $self->find_resource ("shading", "sh"); |
1546 |
|
|
$self->{bg_opts}->{tint} = $self->find_resource ("tintColor", "tint"); |
1547 |
|
|
$self->{bg_opts}->{blur} = $self->find_resource ("blurRadius", "blr"); |
1548 |
|
|
if ($self->x_resource_boolean ("transparent") |
1549 |
|
|
or $self->x_resource_boolean ("tr")) { |
1550 |
|
|
$self->{bg_opts}->{root} = 1; |
1551 |
|
|
} |
1552 |
|
|
|
1553 |
|
|
$self->old_bg_opts ($self->find_resource ("backgroundPixmap", "pixmap")); |
1554 |
|
|
$expr = $self->old_bg_expr; |
1555 |
|
|
} |
1556 |
|
|
|
1557 |
|
|
$expr or return; |
1558 |
root |
1.33 |
|
1559 |
root |
1.48 |
$self->has_render |
1560 |
|
|
or die "background extension needs RENDER extension 0.10 or higher, ignoring background-expr.\n"; |
1561 |
|
|
|
1562 |
root |
1.33 |
$self->set_expr (parse_expr $expr); |
1563 |
root |
1.47 |
$self->{border} = $self->x_resource_boolean ("%.border"); |
1564 |
root |
1.1 |
|
1565 |
root |
1.47 |
$MIN_INTERVAL = $self->x_resource ("%.interval"); |
1566 |
root |
1.46 |
|
1567 |
root |
1.1 |
() |
1568 |
|
|
} |
1569 |
|
|
|