[ViewVC] Diff of: cvs/rxvt-unicode/src/perl/background

Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.41 by root, Fri Jun 8 22:21:48 2012 UTC vs.
Revision 1.51 by sf-exg, Sun Jun 10 19:01:03 2012 UTC

…		…
1	#! perl	1	#! perl
2		2
3	#:META:X_RESOURCE:%.expr:string:background expression	3	#:META:X_RESOURCE:%.expr:string:background expression
4	#:META:X_RESOURCE:%.border.:boolean:respect the terminal border	4	#:META:X_RESOURCE:%.border:boolean:respect the terminal border
5		5	#:META:X_RESOURCE:%.interval:seconds:minimum time between updates
6	#TODO: once, rootalign
7		6
8	=head1 NAME	7	=head1 NAME
9		8
10	background - manage terminal background	9	background - manage terminal background
11		10
12	=head1 SYNOPSIS	11	=head1 SYNOPSIS
13		12
14	urxvt --background-expr 'background expression'	13	urxvt --background-expr 'background expression'
15	--background-border	14	--background-border
		15	--background-interval seconds
16		16
17	=head1 DESCRIPTION	17	=head1 DESCRIPTION
18		18
19	This extension manages the terminal background by creating a picture that	19	This extension manages the terminal background by creating a picture that
20	is behind the text, replacing the normal background colour.	20	is behind the text, replacing the normal background colour.
57		57
58	For example, an expression such as C<scale load "$HOME/mybg.png"> scales the	58	For example, an expression such as C<scale load "$HOME/mybg.png"> scales the
59	image to the window size, so it relies on the window size and will	59	image to the window size, so it relies on the window size and will
60	be reevaluated each time it is changed, but not when it moves for	60	be reevaluated each time it is changed, but not when it moves for
61	example. That ensures that the picture always fills the terminal, even	61	example. That ensures that the picture always fills the terminal, even
62	after it's size changes.	62	after its size changes.
63		63
64	=head2 EXPRESSIONS	64	=head2 EXPRESSIONS
65		65
66	Expressions are normal Perl expressions, in fact, they are Perl blocks -	66	Expressions are normal Perl expressions, in fact, they are Perl blocks -
67	which means you could use multiple lines and statements:	67	which means you could use multiple lines and statements:
…		…
99	its result becomes the argument to the C<scale> function.	99	its result becomes the argument to the C<scale> function.
100		100
101	Many operators also allow some parameters preceding the input image	101	Many operators also allow some parameters preceding the input image
102	that modify its behaviour. For example, C<scale> without any additional	102	that modify its behaviour. For example, C<scale> without any additional
103	arguments scales the image to size of the terminal window. If you specify	103	arguments scales the image to size of the terminal window. If you specify
104	an additional argument, it uses it as a percentage:	104	an additional argument, it uses it as a scale factor (multiply by 100 to
		105	get a percentage):
105		106
106	scale 200, load "$HOME/mypic.png"	107	scale 2, load "$HOME/mypic.png"
107		108
108	This enlarges the image by a factor of 2 (200%). As you can see, C<scale>	109	This enlarges the image by a factor of 2 (200%). As you can see, C<scale>
109	has now two arguments, the C<200> and the C<load> expression, while	110	has now two arguments, the C<200> and the C<load> expression, while
110	C<load> only has one argument. Arguments are separated from each other by	111	C<load> only has one argument. Arguments are separated from each other by
111	commas.	112	commas.
112		113
113	Scale also accepts two arguments, which are then separate factors for both	114	Scale also accepts two arguments, which are then separate factors for both
114	horizontal and vertical dimensions. For example, this halves the image	115	horizontal and vertical dimensions. For example, this halves the image
115	width and doubles the image height:	116	width and doubles the image height:
116		117
117	scale 50, 200, load "$HOME/mypic.png"	118	scale 0.5, 2, load "$HOME/mypic.png"
118		119
119	Other effects than scalign are also readily available, for exmaple, you can	120	Other effects than scaling are also readily available, for example, you can
120	tile the image to fill the whole window, instead of resizing it:	121	tile the image to fill the whole window, instead of resizing it:
121		122
122	tile load "$HOME/mypic.png"	123	tile load "$HOME/mypic.png"
123		124
124	In fact, images returned by C<load> are in C<tile> mode by default, so the C<tile> operator	125	In fact, images returned by C<load> are in C<tile> mode by default, so the C<tile> operator
…		…
150	This only works for one cycle though, so as long as you load the same	151	This only works for one cycle though, so as long as you load the same
151	image every time, it will always be cached, but when you load a different	152	image every time, it will always be cached, but when you load a different
152	image, it will forget about the first one.	153	image, it will forget about the first one.
153		154
154	This allows you to either speed things up by keeping multiple images in	155	This allows you to either speed things up by keeping multiple images in
155	memory, or comserve memory by loading images more often.	156	memory, or conserve memory by loading images more often.
156		157
157	For example, you can keep two images in memory and use a random one like	158	For example, you can keep two images in memory and use a random one like
158	this:	159	this:
159		160
160	my $img1 = load "img1.png";	161	my $img1 = load "img1.png";
…		…
188	overwriting borders and any other areas, such as the scrollbar.	189	overwriting borders and any other areas, such as the scrollbar.
189		190
190	Specifying this flag changes the behaviour, so that the image only	191	Specifying this flag changes the behaviour, so that the image only
191	replaces the background of the character area.	192	replaces the background of the character area.
192		193
		194	=item --background-interval seconds
		195
		196	Since some operations in the underlying XRender extension can effectively
		197	freeze your X-server for prolonged time, this extension enforces a minimum
		198	time between updates, which is normally about 0.1 seconds.
		199
		200	If you want to do updates more often, you can decrease this safety
		201	interval with this switch.
		202
193	=back	203	=back
194		204
195	=cut	205	=cut
196		206
		207	our %_IMGCACHE;
197	our $HOME;	208	our $HOME;
198	our ($self, $old, $new);	209	our ($self, $old, $new);
199	our ($x, $y, $w, $h);	210	our ($x, $y, $w, $h);
200		211
201	# enforce at least this interval between updates	212	# enforce at least this interval between updates
202	our $MIN_INTERVAL = 1/100;	213	our $MIN_INTERVAL = 6/59.951;
203		214
204	{	215	{
205	package urxvt::bgdsl; # background language	216	package urxvt::bgdsl; # background language
		217
		218	use List::Util qw(min max sum shuffle);
206		219
207	=head2 PROVIDERS/GENERATORS	220	=head2 PROVIDERS/GENERATORS
208		221
209	These functions provide an image, by loading it from disk, grabbing it	222	These functions provide an image, by loading it from disk, grabbing it
210	from the root screen or by simply generating it. They are used as starting	223	from the root screen or by simply generating it. They are used as starting
…		…
252	If C<$width> and C<$height> are omitted, it creates a 1x1 image, which is	265	If C<$width> and C<$height> are omitted, it creates a 1x1 image, which is
253	useful for solid backgrounds or for use in filtering effects.	266	useful for solid backgrounds or for use in filtering effects.
254		267
255	=cut	268	=cut
256		269
257	sub solid($$;$) {	270	sub solid($;$$) {
258	my $colour = pop;	271	my $colour = pop;
259		272
260	my $img = $self->new_img (urxvt::PictStandardARGB32, $_[0] \|\| 1, $_[1] \|\| 1);	273	my $img = $self->new_img (urxvt::PictStandardARGB32, $_[0] \|\| 1, $_[1] \|\| 1);
261	$img->fill ($colour);	274	$img->fill ($colour);
262	$img	275	$img
263	}	276	}
264		277
		278	=item clone $img
		279
		280	Returns an exact copy of the image. This is useful if you want to have
		281	multiple copies of the same image to apply different effects to.
		282
		283	=cut
		284
		285	sub clone($) {
		286	$_[0]->clone
		287	}
		288
265	=back	289	=back
266		290
		291	=head2 TILING MODES
		292
		293	The following operators modify the tiling mode of an image, that is, the
		294	way that pixels outside the image area are painted when the image is used.
		295
		296	=over 4
		297
		298	=item tile $img
		299
		300	Tiles the whole plane with the image and returns this new image - or in
		301	other words, it returns a copy of the image in plane tiling mode.
		302
		303	Example: load an image and tile it over the background, without
		304	resizing. The C<tile> call is superfluous because C<load> already defaults
		305	to tiling mode.
		306
		307	tile load "mybg.png"
		308
		309	=item mirror $img
		310
		311	Similar to tile, but reflects the image each time it uses a new copy, so
		312	that top edges always touch top edges, right edges always touch right
		313	edges and so on (with normal tiling, left edges always touch right edges
		314	and top always touch bottom edges).
		315
		316	Example: load an image and mirror it over the background, avoiding sharp
		317	edges at the image borders at the expense of mirroring the image itself
		318
		319	mirror load "mybg.png"
		320
		321	=item pad $img
		322
		323	Takes an image and modifies it so that all pixels outside the image area
		324	become transparent. This mode is most useful when you want to place an
		325	image over another image or the background colour while leaving all
		326	background pixels outside the image unchanged.
		327
		328	Example: load an image and display it in the upper left corner. The rest
		329	of the space is left "empty" (transparent or whatever your compositor does
		330	in alpha mode, else background colour).
		331
		332	pad load "mybg.png"
		333
		334	=item extend $img
		335
		336	Extends the image over the whole plane, using the closest pixel in the
		337	area outside the image. This mode is mostly useful when you use more complex
		338	filtering operations and want the pixels outside the image to have the
		339	same values as the pixels near the edge.
		340
		341	Example: just for curiosity, how does this pixel extension stuff work?
		342
		343	extend move 50, 50, load "mybg.png"
		344
		345	=cut
		346
		347	sub pad($) {
		348	my $img = $_[0]->clone;
		349	$img->repeat_mode (urxvt::RepeatNone);
		350	$img
		351	}
		352
		353	sub tile($) {
		354	my $img = $_[0]->clone;
		355	$img->repeat_mode (urxvt::RepeatNormal);
		356	$img
		357	}
		358
		359	sub mirror($) {
		360	my $img = $_[0]->clone;
		361	$img->repeat_mode (urxvt::RepeatReflect);
		362	$img
		363	}
		364
		365	sub extend($) {
		366	my $img = $_[0]->clone;
		367	$img->repeat_mode (urxvt::RepeatPad);
		368	$img
		369	}
		370
		371	=back
		372
267	=head2 VARIABLES	373	=head2 VARIABLE VALUES
268		374
269	The following functions provide variable data such as the terminal window	375	The following functions provide variable data such as the terminal window
270	dimensions. They are not (Perl-) variables, they jsut return stuff that	376	dimensions. They are not (Perl-) variables, they just return stuff that
271	varies. Most of them make your expression sensitive to some events, for	377	varies. Most of them make your expression sensitive to some events, for
272	example using C<TW> (terminal width) means your expression is evaluated	378	example using C<TW> (terminal width) means your expression is evaluated
273	again when the terminal is resized.	379	again when the terminal is resized.
274		380
275	=over 4	381	=over 4
…		…
349	$self->{counter} + 0	455	$self->{counter} + 0
350	}	456	}
351		457
352	=back	458	=back
353		459
354	=head2 TILING MODES	460	=head2 SHAPE CHANGING OPERATORS
355		461
356	The following operators modify the tiling mode of an image, that is, the	462	The following operators modify the shape, size or position of the image.
357	way that pixels outside the image area are painted when the image is used.
358		463
359	=over 4	464	=over 4
360
361	=item tile $img
362
363	Tiles the whole plane with the image and returns this new image - or in
364	other words, it returns a copy of the image in plane tiling mode.
365
366	Example: load an image and tile it over the background, without
367	resizing. The C<tile> call is superfluous because C<load> already defaults
368	to tiling mode.
369
370	tile load "mybg.png"
371
372	=item mirror $img
373
374	Similar to tile, but reflects the image each time it uses a new copy, so
375	that top edges always touch top edges, right edges always touch right
376	edges and so on (with normal tiling, left edges always touch right edges
377	and top always touch bottom edges).
378
379	Example: load an image and mirror it over the background, avoiding sharp
380	edges at the image borders at the expense of mirroring the image itself
381
382	mirror load "mybg.png"
383
384	=item pad $img
385
386	Takes an image and modifies it so that all pixels outside the image area
387	become transparent. This mode is most useful when you want to place an
388	image over another image or the background colour while leaving all
389	background pixels outside the image unchanged.
390
391	Example: load an image and display it in the upper left corner. The rest
392	of the space is left "empty" (transparent or wahtever your compisotr does
393	in alpha mode, else background colour).
394
395	pad load "mybg.png"
396
397	=item extend $img
398
399	Extends the image over the whole plane, using the closest pixel in the
400	area outside the image. This mode is mostly useful when you more complex
401	filtering operations and want the pixels outside the image to have the
402	same values as the pixels near the edge.
403
404	Example: just for curiosity, how does this pixel extension stuff work?
405
406	extend move 50, 50, load "mybg.png"
407
408	=cut
409
410	sub pad($) {
411	my $img = $_[0]->clone;
412	$img->repeat_mode (urxvt::RepeatNone);
413	$img
414	}
415
416	sub tile($) {
417	my $img = $_[0]->clone;
418	$img->repeat_mode (urxvt::RepeatNormal);
419	$img
420	}
421
422	sub mirror($) {
423	my $img = $_[0]->clone;
424	$img->repeat_mode (urxvt::RepeatReflect);
425	$img
426	}
427
428	sub extend($) {
429	my $img = $_[0]->clone;
430	$img->repeat_mode (urxvt::RepeatPad);
431	$img
432	}
433
434	=back
435
436	=head2 PIXEL OPERATORS
437
438	The following operators modify the image pixels in various ways.
439
440	=over 4
441
442	=item clone $img
443
444	Returns an exact copy of the image.
445
446	=cut
447
448	sub clone($) {
449	$_[0]->clone
450	}
451		465
452	=item clip $img	466	=item clip $img
453		467
454	=item clip $width, $height, $img	468	=item clip $width, $height, $img
455		469
…		…
479	$img->sub_rect ($_[0], $_[1], $w, $h)	493	$img->sub_rect ($_[0], $_[1], $w, $h)
480	}	494	}
481		495
482	=item scale $img	496	=item scale $img
483		497
484	=item scale $size_percent, $img	498	=item scale $size_factor, $img
485		499
486	=item scale $width_percent, $height_percent, $img	500	=item scale $width_factor, $height_factor, $img
487		501
488	Scales the image by the given percentages in horizontal	502	Scales the image by the given factors in horizontal
489	(C<$width_percent>) and vertical (C<$height_percent>) direction.	503	(C<$width>) and vertical (C<$height>) direction.
490		504
491	If only one percentage is give, it is used for both directions.	505	If only one factor is give, it is used for both directions.
492		506
493	If no percentages are given, scales the image to the window size without	507	If no factors are given, scales the image to the window size without
494	keeping aspect.	508	keeping aspect.
495		509
496	=item resize $width, $height, $img	510	=item resize $width, $height, $img
497		511
498	Resizes the image to exactly C<$width> times C<$height> pixels.	512	Resizes the image to exactly C<$width> times C<$height> pixels.
499		513
500	=cut	514	=item fit $img
501		515
502	#TODO: maximise, maximise_fill?	516	=item fit $width, $height, $img
		517
		518	Fits the image into the given C<$width> and C<$height> without changing
		519	aspect, or the terminal size. That means it will be shrunk or grown until
		520	the whole image fits into the given area, possibly leaving borders.
		521
		522	=item cover $img
		523
		524	=item cover $width, $height, $img
		525
		526	Similar to C<fit>, but shrinks or grows until all of the area is covered
		527	by the image, so instead of potentially leaving borders, it will cut off
		528	image data that doesn't fit.
		529
		530	=cut
503		531
504	sub scale($;$;$) {	532	sub scale($;$;$) {
505	my $img = pop;	533	my $img = pop;
506		534
507	@_ == 2 ? $img->scale ($_[0] * $img->w * 0.01, $_[1] * $img->h * 0.01)	535	@_ == 2 ? $img->scale ($_[0] * $img->w, $_[1] * $img->h)
508	: @_ ? $img->scale ($_[0] * $img->w * 0.01, $_[0] * $img->h * 0.01)	536	: @_ ? $img->scale ($_[0] * $img->w, $_[0] * $img->h)
509	: $img->scale (TW, TH)	537	: $img->scale (TW, TH)
510	}	538	}
511		539
512	sub resize($$$) {	540	sub resize($$$) {
513	my $img = pop;	541	my $img = pop;
514	$img->scale ($_[0], $_[1])	542	$img->scale ($_[0], $_[1])
		543	}
		544
		545	sub fit($;$$) {
		546	my $img = pop;
		547	my $w = ($_[0] \|\| TW) / $img->w;
		548	my $h = ($_[1] \|\| TH) / $img->h;
		549	scale +(min $w, $h), $img
		550	}
		551
		552	sub cover($;$$) {
		553	my $img = pop;
		554	my $w = ($_[0] \|\| TW) / $img->w;
		555	my $h = ($_[1] \|\| TH) / $img->h;
		556	scale +(max $w, $h), $img
515	}	557	}
516		558
517	=item move $dx, $dy, $img	559	=item move $dx, $dy, $img
518		560
519	Moves the image by C<$dx> pixels in the horizontal, and C<$dy> pixels in	561	Moves the image by C<$dx> pixels in the horizontal, and C<$dy> pixels in
520	the vertical.	562	the vertical.
521		563
522	Example: move the image right by 20 pixels and down by 30.	564	Example: move the image right by 20 pixels and down by 30.
523		565
524	move 20, 30, ...	566	move 20, 30, ...
		567
		568	=item align $xalign, $yalign, $img
		569
		570	Aligns the image according to a factor - C<0> means the image is moved to
		571	the left or top edge (for C<$xalign> or C<$yalign>), C<0.5> means it is
		572	exactly centered and C<1> means it touches the right or bottom edge.
		573
		574	Example: remove any visible border around an image, center it vertically but move
		575	it to the right hand side.
		576
		577	align 1, 0.5, pad $img
		578
		579	=item center $img
		580
		581	=item center $width, $height, $img
		582
		583	Centers the image, i.e. the center of the image is moved to the center of
		584	the terminal window (or the box specified by C<$width> and C<$height> if
		585	given).
		586
		587	Example: load an image and center it.
		588
		589	center pad load "mybg.png"
525		590
526	=item rootalign $img	591	=item rootalign $img
527		592
528	Moves the image so that it appears glued to the screen as opposed to the	593	Moves the image so that it appears glued to the screen as opposed to the
529	window. This gives the illusion of a larger area behind the window. It is	594	window. This gives the illusion of a larger area behind the window. It is
…		…
535	rootalign mirror load "mybg.png"	600	rootalign mirror load "mybg.png"
536		601
537	Example: take the screen background and align it, giving the illusion of	602	Example: take the screen background and align it, giving the illusion of
538	transparency as long as the window isn't in front of other windows.	603	transparency as long as the window isn't in front of other windows.
539		604
540	rootalign root	605	rootalign root
541		606
542	=cut	607	=cut
543		608
544	sub move($$;$) {	609	sub move($$;$) {
545	my $img = pop->clone;	610	my $img = pop->clone;
546	$img->move ($_[0], $_[1]);	611	$img->move ($_[0], $_[1]);
547	$img	612	$img
548	}	613	}
549		614
		615	sub align($;$$) {
		616	my $img = pop;
		617
		618	move $_[0] * (TW - $img->w),
		619	$_[1] * (TH - $img->h),
		620	$img
		621	}
		622
		623	sub center($;$$) {
		624	my $img = pop;
		625	my $w = $_[0] \|\| TW;
		626	my $h = $_[1] \|\| TH;
		627
		628	move 0.5 * ($w - $img->w), 0.5 * ($h - $img->h), $img
		629	}
		630
550	sub rootalign($) {	631	sub rootalign($) {
551	move -TX, -TY, $_[0]	632	move -TX, -TY, $_[0]
552	}	633	}
553		634
		635	=back
		636
		637	=head2 COLOUR MODIFICATIONS
		638
		639	The following operators change the pixels of the image.
		640
		641	=over 4
		642
554	=item contrast $factor, $img	643	=item contrast $factor, $img
555		644
556	=item contrast $r, $g, $b, $img	645	=item contrast $r, $g, $b, $img
557		646
558	=item contrast $r, $g, $b, $a, $img	647	=item contrast $r, $g, $b, $a, $img
559		648
560	Adjusts the I<contrast> of an image.	649	Adjusts the I<contrast> of an image.
561		650
562	#TODO#	651	The first form applies a single C<$factor> to red, green and blue, the
		652	second form applies separate factors to each colour channel, and the last
		653	form includes the alpha channel.
563		654
		655	Values from 0 to 1 lower the contrast, values higher than 1 increase the
		656	contrast.
		657
		658	Due to limitations in the underlying XRender extension, lowering contrast
		659	also reduces brightness, while increasing contrast currently also
		660	increases brightness.
		661
564	=item brightness $factor, $img	662	=item brightness $bias, $img
565		663
566	=item brightness $r, $g, $b, $img	664	=item brightness $r, $g, $b, $img
567		665
568	=item brightness $r, $g, $b, $a, $img	666	=item brightness $r, $g, $b, $a, $img
569		667
570	Adjusts the brightness of an image.	668	Adjusts the brightness of an image.
571		669
		670	The first form applies a single C<$bias> to red, green and blue, the
		671	second form applies separate biases to each colour channel, and the last
		672	form includes the alpha channel.
		673
		674	Values less than 0 reduce brightness, while values larger than 0 increase
		675	it. Useful range is from -1 to 1 - the former results in a black, the
		676	latter in a white picture.
		677
		678	Due to idiosyncrasies in the underlying XRender extension, biases less
		679	than zero can be I<very> slow.
		680
572	=cut	681	=cut
573		682
574	sub contrast($$;$$;$) {	683	sub contrast($$;$$;$) {
575	my $img = pop;	684	my $img = pop;
576	my ($r, $g, $b, $a) = @_;	685	my ($r, $g, $b, $a) = @_;
577		686
578	($g, $b) = ($r, $r) if @_ < 4;	687	($g, $b) = ($r, $r) if @_ < 3;
579	$a = 1 if @_ < 5;	688	$a = 1 if @_ < 4;
580		689
581	$img = $img->clone;	690	$img = $img->clone;
582	$img->contrast ($r, $g, $b, $a);	691	$img->contrast ($r, $g, $b, $a);
583	$img	692	$img
584	}	693	}
585		694
586	sub brightness($$;$$;$) {	695	sub brightness($$;$$;$) {
587	my $img = pop;	696	my $img = pop;
588	my ($r, $g, $b, $a) = @_;	697	my ($r, $g, $b, $a) = @_;
589		698
590	($g, $b) = ($r, $r) if @_ < 4;	699	($g, $b) = ($r, $r) if @_ < 3;
591	$a = 1 if @_ < 5;	700	$a = 1 if @_ < 4;
592		701
593	$img = $img->clone;	702	$img = $img->clone;
594	$img->brightness ($r, $g, $b, $a);	703	$img->brightness ($r, $g, $b, $a);
595	$img	704	$img
596	}	705	}
…		…
615	}	724	}
616		725
617	=item rotate $new_width, $new_height, $center_x, $center_y, $degrees	726	=item rotate $new_width, $new_height, $center_x, $center_y, $degrees
618		727
619	Rotates the image by C<$degrees> degrees, counter-clockwise, around the	728	Rotates the image by C<$degrees> degrees, counter-clockwise, around the
620	pointer at C<$center_x> and C<$center_y> (specified as percentage of image	729	pointer at C<$center_x> and C<$center_y> (specified as factor of image
621	width/height), generating a new image with width C<$new_width> and height	730	width/height), generating a new image with width C<$new_width> and height
622	C<$new_height>.	731	C<$new_height>.
623		732
624	#TODO# new width, height, maybe more operators?	733	#TODO# new width, height, maybe more operators?
625		734
…		…
630	sub rotate($$$$$$) {	739	sub rotate($$$$$$) {
631	my $img = pop;	740	my $img = pop;
632	$img->rotate (	741	$img->rotate (
633	$_[0],	742	$_[0],
634	$_[1],	743	$_[1],
635	$_[2] * $img->w * .01,	744	$_[2] * $img->w,
636	$_[3] * $img->h * .01,	745	$_[3] * $img->h,
637	$_[4] * (3.14159265 / 180),	746	$_[4] * (3.14159265 / 180),
638	)	747	)
639	}	748	}
640		749
641	=back	750	=back
…		…
686		795
687	# evaluate user expression	796	# evaluate user expression
688		797
689	my $img = eval { $self->{expr}->() };	798	my $img = eval { $self->{expr}->() };
690	warn $@ if $@;#d#	799	warn $@ if $@;#d#
691	die if !UNIVERSAL::isa $img, "urxvt::img";	800	die "background-expr did not return an image.\n" if !UNIVERSAL::isa $img, "urxvt::img";
692		801
693	$state->{size_sensitive} = 1	802	$state->{size_sensitive} = 1
694	if $img->repeat_mode != urxvt::RepeatNormal;	803	if $img->repeat_mode != urxvt::RepeatNormal;
695		804
696	# if the expression is sensitive to external events, prepare reevaluation then	805	# if the expression is sensitive to external events, prepare reevaluation then
…		…
746	}	855	}
747		856
748	sub on_start {	857	sub on_start {
749	my ($self) = @_;	858	my ($self) = @_;
750		859
751	my $expr = $self->x_resource ("background.expr")	860	my $expr = $self->x_resource ("%.expr")
752	or return;	861	or return;
753		862
		863	$self->has_render
		864	or die "background extension needs RENDER extension 0.10 or higher, ignoring background-expr.\n";
		865
754	$self->set_expr (parse_expr $expr);	866	$self->set_expr (parse_expr $expr);
755	$self->{border} = $self->x_resource_boolean ("background.border");	867	$self->{border} = $self->x_resource_boolean ("%.border");
		868
		869	$MIN_INTERVAL = $self->x_resource ("%.interval");
756		870
757	()	871	()
758	}	872	}
759		873

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Comparing rxvt-unicode/src/perl/background (file contents): Revision 1.41 by root, Fri Jun 8 22:21:48 2012 UTC vs. Revision 1.51 by sf-exg, Sun Jun 10 19:01:03 2012 UTC

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Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.41 by root, Fri Jun 8 22:21:48 2012 UTC vs.
Revision 1.51 by sf-exg, Sun Jun 10 19:01:03 2012 UTC