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

Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.75 by root, Fri Aug 10 20:07:11 2012 UTC vs.
Revision 1.97 by root, Tue Sep 17 18:17:14 2019 UTC

…		…
1	#! perl	1	#! perl
2		2
3	#:META:X_RESOURCE:%.expr:string:background expression	3	#:META:RESOURCE:%.expr:string:background expression
4	#:META:X_RESOURCE:%.border:boolean:respect the terminal border	4	#:META:RESOURCE:%.border:boolean:respect the terminal border
5	#:META:X_RESOURCE:%.interval:seconds:minimum time between updates	5	#:META:RESOURCE:%.interval:seconds:minimum time between updates
		6	#: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
6		16
7	=head1 NAME	17	=head1 NAME
8		18
9	background - manage terminal background	19	background - manage terminal background
10		20
11	=head1 SYNOPSIS	21	=head1 SYNOPSIS
12		22
13	urxvt --background-expr 'background expression'	23	urxvt --background-expr 'background expression'
14	--background-border	24	--background-border
54		64
55	urxvt --background-expr 'scale keep { load "/path/to/mybg.png" }'	65	urxvt --background-expr 'scale keep { load "/path/to/mybg.png" }'
56		66
57	Or specified as a X resource:	67	Or specified as a X resource:
58		68
59	URxvt.background-expr: scale keep { load "/path/to/mybg.png" }	69	URxvt.background.expr: scale keep { load "/path/to/mybg.png" }
60		70
61	=head1 THEORY OF OPERATION	71	=head1 THEORY OF OPERATION
62		72
63	At startup, just before the window is mapped for the first time, the	73	At startup, just before the window is mapped for the first time, the
64	expression is evaluated and must yield an image. The image is then	74	expression is evaluated and must yield an image. The image is then
…		…
132	get a percentage):	142	get a percentage):
133		143
134	scale 2, load "$HOME/mypic.png"	144	scale 2, load "$HOME/mypic.png"
135		145
136	This enlarges the image by a factor of 2 (200%). As you can see, C<scale>	146	This enlarges the image by a factor of 2 (200%). As you can see, C<scale>
137	has now two arguments, the C<200> and the C<load> expression, while	147	has now two arguments, the C<2> and the C<load> expression, while
138	C<load> only has one argument. Arguments are separated from each other by	148	C<load> only has one argument. Arguments are separated from each other by
139	commas.	149	commas.
140		150
141	Scale also accepts two arguments, which are then separate factors for both	151	Scale also accepts two arguments, which are then separate factors for both
142	horizontal and vertical dimensions. For example, this halves the image	152	horizontal and vertical dimensions. For example, this halves the image
…		…
279	=cut	289	=cut
280		290
281	our %_IMG_CACHE;	291	our %_IMG_CACHE;
282	our $HOME;	292	our $HOME;
283	our ($self, $frame);	293	our ($self, $frame);
284	our ($x, $y, $w, $h);	294	our ($x, $y, $w, $h, $focus);
285		295
286	# enforce at least this interval between updates	296	# enforce at least this interval between updates
287	our $MIN_INTERVAL = 6/59.951;	297	our $MIN_INTERVAL = 6/59.951;
288		298
289	{	299	{
…		…
308		318
309	Loads the image at the given C<$path>. The image is set to plane tiling	319	Loads the image at the given C<$path>. The image is set to plane tiling
310	mode.	320	mode.
311		321
312	If the image is already in memory (e.g. because another terminal instance	322	If the image is already in memory (e.g. because another terminal instance
313	uses it), then the in-memory copy us returned instead.	323	uses it), then the in-memory copy is returned instead.
314		324
315	=item load_uc $path	325	=item load_uc $path
316		326
317	Load uncached - same as load, but does not cache the image, which means it	327	Load uncached - same as load, but does not cache the image, which means it
318	is I<always> loaded from the filesystem again, even if another copy of it	328	is I<always> loaded from the filesystem again, even if another copy of it
…		…
422	for @_;	432	for @_;
423		433
424	$base	434	$base
425	}	435	}
426		436
		437	=back
		438
427	=head2 TILING MODES	439	=head2 TILING MODES
428		440
429	The following operators modify the tiling mode of an image, that is, the	441	The following operators modify the tiling mode of an image, that is, the
430	way that pixels outside the image area are painted when the image is used.	442	way that pixels outside the image area are painted when the image is used.
431		443
…		…
522		534
523	Return the X and Y coordinates of the terminal window (the terminal	535	Return the X and Y coordinates of the terminal window (the terminal
524	window is the full window by default, and the character area only when in	536	window is the full window by default, and the character area only when in
525	border-respect mode).	537	border-respect mode).
526		538
527	Using these functions make your expression sensitive to window moves.	539	Using these functions makes your expression sensitive to window moves.
528		540
529	These functions are mainly useful to align images to the root window.	541	These functions are mainly useful to align images to the root window.
530		542
531	Example: load an image and align it so it looks as if anchored to the	543	Example: load an image and align it so it looks as if anchored to the
532	background (that's exactly what C<rootalign> does btw.):	544	background (that's exactly what C<rootalign> does btw.):
533		545
534	move -TX, -TY, keep { load "mybg.png" }	546	move -TX, -TY, keep { load "mybg.png" }
535		547
536	=item TW	548	=item TW
		549
		550	=item TH
537		551
538	Return the width (C<TW>) and height (C<TH>) of the terminal window (the	552	Return the width (C<TW>) and height (C<TH>) of the terminal window (the
539	terminal window is the full window by default, and the character area only	553	terminal window is the full window by default, and the character area only
540	when in border-respect mode).	554	when in border-respect mode).
541		555
542	Using these functions make your expression sensitive to window resizes.	556	Using these functions makes your expression sensitive to window resizes.
543		557
544	These functions are mainly useful to scale images, or to clip images to	558	These functions are mainly useful to scale images, or to clip images to
545	the window size to conserve memory.	559	the window size to conserve memory.
546		560
547	Example: take the screen background, clip it to the window size, blur it a	561	Example: take the screen background, clip it to the window size, blur it a
548	bit, align it to the window position and use it as background.	562	bit, align it to the window position and use it as background.
549		563
550	clip move -TX, -TY, keep { blur 5, root }	564	clip move -TX, -TY, keep { blur 5, root }
551		565
552	=cut	566	=item FOCUS
553		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	Example: use two entirely different background images, depending on
		578	whether the window has focus.
		579
		580	FOCUS ? keep { load "has_focus.jpg" } : keep { load "no_focus.jpg" }
		581
		582	=cut
		583
554	sub TX() { $frame->[FR_AGAIN]{position} = 1; $x }	584	sub TX () { $frame->[FR_AGAIN]{position} = 1; $x }
555	sub TY() { $frame->[FR_AGAIN]{position} = 1; $y }	585	sub TY () { $frame->[FR_AGAIN]{position} = 1; $y }
556	sub TW() { $frame->[FR_AGAIN]{size} = 1; $w }	586	sub TW () { $frame->[FR_AGAIN]{size} = 1; $w }
557	sub TH() { $frame->[FR_AGAIN]{size} = 1; $h }	587	sub TH () { $frame->[FR_AGAIN]{size} = 1; $h }
		588	sub FOCUS() { $frame->[FR_AGAIN]{focus} = 1; $focus }
558		589
559	=item now	590	=item now
560		591
561	Returns the current time as (fractional) seconds since the epoch.	592	Returns the current time as (fractional) seconds since the epoch.
562		593
…		…
609	Clips an image to the given rectangle. If the rectangle is outside the	640	Clips an image to the given rectangle. If the rectangle is outside the
610	image area (e.g. when C<$x> or C<$y> are negative) or the rectangle is	641	image area (e.g. when C<$x> or C<$y> are negative) or the rectangle is
611	larger than the image, then the tiling mode defines how the extra pixels	642	larger than the image, then the tiling mode defines how the extra pixels
612	will be filled.	643	will be filled.
613		644
614	If C<$x> an C<$y> are missing, then C<0> is assumed for both.	645	If C<$x> and C<$y> are missing, then C<0> is assumed for both.
615		646
616	If C<$width> and C<$height> are missing, then the window size will be	647	If C<$width> and C<$height> are missing, then the window size will be
617	assumed.	648	assumed.
618		649
619	Example: load an image, blur it, and clip it to the window size to save	650	Example: load an image, blur it, and clip it to the window size to save
…		…
637	=item scale $width_factor, $height_factor, $img	668	=item scale $width_factor, $height_factor, $img
638		669
639	Scales the image by the given factors in horizontal	670	Scales the image by the given factors in horizontal
640	(C<$width>) and vertical (C<$height>) direction.	671	(C<$width>) and vertical (C<$height>) direction.
641		672
642	If only one factor is give, it is used for both directions.	673	If only one factor is given, it is used for both directions.
643		674
644	If no factors are given, scales the image to the window size without	675	If no factors are given, scales the image to the window size without
645	keeping aspect.	676	keeping aspect.
646		677
647	=item resize $width, $height, $img	678	=item resize $width, $height, $img
…		…
772	=item rotate $center_x, $center_y, $degrees, $img	803	=item rotate $center_x, $center_y, $degrees, $img
773		804
774	Rotates the image clockwise by C<$degrees> degrees, around the point at	805	Rotates the image clockwise by C<$degrees> degrees, around the point at
775	C<$center_x> and C<$center_y> (specified as factor of image width/height).	806	C<$center_x> and C<$center_y> (specified as factor of image width/height).
776		807
777	Example: rotate the image by 90 degrees around it's center.	808	Example: rotate the image by 90 degrees around its center.
778		809
779	rotate 0.5, 0.5, 90, keep { load "$HOME/mybg.png" }	810	rotate 0.5, 0.5, 90, keep { load "$HOME/mybg.png" }
780		811
781	=cut	812	=cut
782		813
…		…
813		844
814	sub tint($$) {	845	sub tint($$) {
815	$_[1]->tint ($_[0])	846	$_[1]->tint ($_[0])
816	}	847	}
817		848
		849	=item shade $factor, $img
		850
		851	Shade the image by the given factor.
		852
		853	=cut
		854
		855	sub shade($$) {
		856	$_[1]->shade ($_[0])
		857	}
		858
818	=item contrast $factor, $img	859	=item contrast $factor, $img
819		860
820	=item contrast $r, $g, $b, $img	861	=item contrast $r, $g, $b, $img
821		862
822	=item contrast $r, $g, $b, $a, $img	863	=item contrast $r, $g, $b, $a, $img
…		…
881	$img	922	$img
882	}	923	}
883		924
884	=item muladd $mul, $add, $img # EXPERIMENTAL	925	=item muladd $mul, $add, $img # EXPERIMENTAL
885		926
886	First multipliesthe pixels by C<$mul>, then adds C<$add>. This cna be used	927	First multiplies the pixels by C<$mul>, then adds C<$add>. This can be used
887	to implement brightness and contrast at the same time, with a wider value	928	to implement brightness and contrast at the same time, with a wider value
888	range than contrast and brightness operators.	929	range than contrast and brightness operators.
889		930
890	Due to numerous bugs in XRender implementations, it can also introduce a	931	Due to numerous bugs in XRender implementations, it can also introduce a
891	number of visual artifacts.	932	number of visual artifacts.
…		…
916	=cut	957	=cut
917		958
918	sub blur($$;$) {	959	sub blur($$;$) {
919	my $img = pop;	960	my $img = pop;
920	$img->blur ($_[0], @_ >= 2 ? $_[1] : $_[0])	961	$img->blur ($_[0], @_ >= 2 ? $_[1] : $_[0])
		962	}
		963
		964	=item focus_fade $img
		965
		966	=item focus_fade $factor, $img
		967
		968	=item focus_fade $factor, $color, $img
		969
		970	Fades the image by the given factor (and colour) when focus is lost (the
		971	same as the C<-fade>/C<-fadecolor> command line options, which also supply
		972	the default values for C<factor> and C<$color>. Unlike with C<-fade>, the
		973	C<$factor> is a real value, not a percentage value (that is, 0..1, not
		974	0..100).
		975
		976	Example: do the right thing when focus fading is requested.
		977
		978	focus_fade load "mybg.jpg";
		979
		980	=cut
		981
		982	sub focus_fade($;$$) {
		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
921	}	995	}
922		996
923	=back	997	=back
924		998
925	=head2 OTHER STUFF	999	=head2 OTHER STUFF
…		…
957		1031
958	This leaves the question of how to force reevaluation of the block,	1032	This leaves the question of how to force reevaluation of the block,
959	in case the root background changes: If expression inside the block	1033	in case the root background changes: If expression inside the block
960	is sensitive to some event (root background changes, window geometry	1034	is sensitive to some event (root background changes, window geometry
961	changes), then it will be reevaluated automatically as needed.	1035	changes), then it will be reevaluated automatically as needed.
		1036
		1037	=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
962		1177
963	=cut	1178	=cut
964		1179
965	sub keep(&) {	1180	sub keep(&) {
966	my $id = $_[0]+0;	1181	my $id = $_[0]+0;
…		…
1064	if ($again->{rootpmap}) {	1279	if ($again->{rootpmap}) {
1065	$state->{rootpmap} = $self->on (rootpmap_change => $cb);	1280	$state->{rootpmap} = $self->on (rootpmap_change => $cb);
1066	} else {	1281	} else {
1067	delete $state->{rootpmap};	1282	delete $state->{rootpmap};
1068	}	1283	}
		1284
		1285	if ($again->{focus}) {
		1286	$state->{focus} = $self->on (focus_in => $cb, focus_out => $cb);
		1287	} else {
		1288	delete $state->{focus};
		1289	}
1069	}	1290	}
1070		1291
1071	# evaluate the current bg expression	1292	# evaluate the current bg expression
1072	sub recalculate {	1293	sub recalculate {
1073	my ($arg_self) = @_;	1294	my ($arg_self) = @_;
…		…
1081	return;	1302	return;
1082	}	1303	}
1083		1304
1084	$arg_self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;	1305	$arg_self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
1085		1306
		1307	unless ($arg_self->has_render) {
		1308	warn "background extension needs RENDER extension 0.10 or higher, ignoring background-expr.\n";
		1309	return;
		1310	}
		1311
1086	# set environment to evaluate user expression	1312	# set environment to evaluate user expression
1087		1313
1088	local $self = $arg_self;	1314	local $self = $arg_self;
1089	local $HOME = $ENV{HOME};	1315	local $HOME = $ENV{HOME};
1090	local $frame = $self->{root};	1316	local $frame = $self->{root};
1091		1317
1092	($x, $y, $w, $h) = $self->background_geometry ($self->{border});	1318	($x, $y, $w, $h) = $self->background_geometry ($self->{border});
		1319	$focus = $self->focus;
1093		1320
1094	# evaluate user expression	1321	# evaluate user expression
1095		1322
1096	my @img = eval { $self->{expr}->() };	1323	my @img = eval { $self->{expr}->() };
1097	die $@ if $@;	1324	die $@ if $@;
…		…
1115	# }	1342	# }
1116		1343
1117	# set background pixmap	1344	# set background pixmap
1118		1345
1119	$self->set_background ($img, $self->{border});	1346	$self->set_background ($img, $self->{border});
1120	$self->scr_recolour (0);	1347	$self->scr_recolor (0);
1121	$self->want_refresh;	1348	$self->want_refresh;
1122	}	1349	}
1123		1350
		1351	sub old_bg_opts {
		1352	my ($self, $arg) = @_;
		1353
		1354	$arg or return;
		1355
		1356	my @str = split /;/, $arg;
		1357
		1358	return unless $str[0] or $self->{bg_opts}->{path};
		1359
		1360	my $bg_opts = $self->{bg_opts};
		1361
		1362	if ($str[0]) {
		1363	$bg_opts->{tile} = 0;
		1364	$bg_opts->{keep_aspect} = 0;
		1365	$bg_opts->{root_align} = 0;
		1366	$bg_opts->{h_scale} = $bg_opts->{v_scale} = 100;
		1367	$bg_opts->{h_align} = $bg_opts->{v_align} = 50;
		1368	$bg_opts->{path} = $str[0];
		1369	}
		1370
		1371	my @oplist = split /:/, $str[1];
		1372
		1373	for (@oplist) {
		1374	if (/style=tiled/i) {
		1375	$bg_opts->{tile} = 1;
		1376	$bg_opts->{keep_aspect} = 0;
		1377	$bg_opts->{root_align} = 0;
		1378	$bg_opts->{h_scale} = $bg_opts->{v_scale} = 0;
		1379	$bg_opts->{h_align} = $bg_opts->{v_align} = 0;
		1380	} elsif (/style=aspect-stretched/i) {
		1381	$bg_opts->{tile} = 0;
		1382	$bg_opts->{keep_aspect} = 1;
		1383	$bg_opts->{root_align} = 0;
		1384	$bg_opts->{h_scale} = $bg_opts->{v_scale} = 100;
		1385	$bg_opts->{h_align} = $bg_opts->{v_align} = 50;
		1386	} elsif (/style=stretched/i) {
		1387	$bg_opts->{tile} = 0;
		1388	$bg_opts->{keep_aspect} = 0;
		1389	$bg_opts->{root_align} = 0;
		1390	$bg_opts->{h_scale} = $bg_opts->{v_scale} = 100;
		1391	$bg_opts->{h_align} = $bg_opts->{v_align} = 50;
		1392	} elsif (/style=centered/i) {
		1393	$bg_opts->{tile} = 0;
		1394	$bg_opts->{keep_aspect} = 0;
		1395	$bg_opts->{root_align} = 0;
		1396	$bg_opts->{h_scale} = $bg_opts->{v_scale} = 0;
		1397	$bg_opts->{h_align} = $bg_opts->{v_align} = 50;
		1398	} elsif (/style=root-tiled/i) {
		1399	$bg_opts->{tile} = 1;
		1400	$bg_opts->{keep_aspect} = 0;
		1401	$bg_opts->{root_align} = 1;
		1402	$bg_opts->{h_scale} = $bg_opts->{v_scale} = 0;
		1403	$bg_opts->{h_align} = $bg_opts->{v_align} = 0;
		1404	} elsif (/op=tile/i) {
		1405	$bg_opts->{tile} = 1;
		1406	} elsif (/op=keep-aspect/i) {
		1407	$bg_opts->{keep_aspect} = 1;
		1408	} elsif (/op=root-align/i) {
		1409	$bg_opts->{root_align} = 1;
		1410	} elsif (/^ =? ([0-9]+)? (?:[xX] ([0-9]+))? ([+-][0-9]+)? ([+-][0-9]+)? $/x) {
		1411	my ($w, $h, $x, $y) = ($1, $2, $3, $4);
		1412
		1413	if ($str[0]) {
		1414	$w = $h unless defined $w;
		1415	$h = $w unless defined $h;
		1416	$y = $x unless defined $y;
		1417	}
		1418
		1419	$bg_opts->{h_scale} = $w if defined $w;
		1420	$bg_opts->{v_scale} = $h if defined $h;
		1421	$bg_opts->{h_align} = $x if defined $x;
		1422	$bg_opts->{v_align} = $y if defined $y;
		1423	}
		1424	}
		1425	}
		1426
		1427	# helper function, quote string as perl without allowing
		1428	# any code execution or other shenanigans. does not
		1429	# support binary NULs in string.
		1430	sub q0 {
		1431	(my $str = shift) =~ s/\x00//g; # make sure there really aren't any embedded NULs
		1432	"q\x00$str\x00"
		1433	}
		1434
		1435	sub old_bg_expr {
		1436	my ($self) = @_;
		1437
		1438	my $expr;
		1439
		1440	my $bg_opts = $self->{bg_opts};
		1441
		1442	if ($bg_opts->{root} =~ /^\s(?:true\|yes\|on\|1)\s$/i) {
		1443	$expr .= "tile (";
		1444
		1445	my $shade = $bg_opts->{shade};
		1446
		1447	if ($shade) {
		1448	$shade = List::Util::min $shade, 200;
		1449	$shade = List::Util::max $shade, -100;
		1450	$shade = 200 - (100 + $shade) if $shade < 0;
		1451
		1452	$shade = $shade * 0.01 - 1;
		1453	$expr .= "shade $shade, ";
		1454	}
		1455
		1456	my $tint = $bg_opts->{tint};
		1457
		1458	if ($tint) {
		1459	$tint = q0 $tint;
		1460	$expr .= "tint $tint,";
		1461	}
		1462
		1463	my $blur = $bg_opts->{blur};
		1464
		1465	if ($blur and $blur =~ /^ =? ([0-9]+)? (?:[xX] ([0-9]+))? $/x) {
		1466	my $hr = defined $1 ? $1 : 1;
		1467	my $vr = defined $2 ? $2 : $hr;
		1468
		1469	if ($hr != 0 and $vr != 0) {
		1470	$expr .= "blur $hr, $vr, ";
		1471	}
		1472	}
		1473
		1474	$expr .= "rootalign root)";
		1475	}
		1476
		1477	if ($bg_opts->{path}) {
		1478	my $file_expr;
		1479	my $h_scale = $bg_opts->{h_scale} * 0.01;
		1480	my $v_scale = $bg_opts->{v_scale} * 0.01;
		1481	my $h_align = $bg_opts->{h_align} * 0.01;
		1482	my $v_align = $bg_opts->{v_align} * 0.01;
		1483
		1484	if (!$bg_opts->{tile}) {
		1485	$file_expr .= "pad (";
		1486	} else {
		1487	$file_expr .= "tile (";
		1488	}
		1489
		1490	if ($bg_opts->{root_align}) {
		1491	$file_expr .= "rootalign ";
		1492	} else {
		1493	$file_expr .= "align $h_align, $v_align, ";
		1494	}
		1495
		1496	if ($h_scale != 0 and $v_scale != 0) {
		1497	my $op = $bg_opts->{keep_aspect} ? "fit" : "resize";
		1498	$file_expr .= "$op TW * $h_scale, TH * $v_scale, ";
		1499	}
		1500
		1501	my $path = q0 $bg_opts->{path};
		1502
		1503	$file_expr .= "keep { load $path })";
		1504
		1505	if ($expr) {
		1506	$expr .= ", tint (\"[50]white\", $file_expr)";
		1507	} else {
		1508	$expr = $file_expr;
		1509	}
		1510	}
		1511
		1512	$expr
		1513	}
		1514
		1515	sub on_osc_seq {
		1516	my ($self, $op, $arg) = @_;
		1517
		1518	$self->{bg_opts} or return;
		1519
		1520	$op =~ /^(?:20\|705)$/ or return;
		1521
		1522	if ($op eq "20") {
		1523	if ($arg eq "?") {
		1524	my $h_scale = $self->{bg_opts}->{h_scale};
		1525	my $v_scale = $self->{bg_opts}->{v_scale};
		1526	my $h_align = $self->{bg_opts}->{h_align};
		1527	my $v_align = $self->{bg_opts}->{v_align};
		1528	$self->cmd_parse ("\033]2;[${h_scale}x${v_scale}+${h_align}+${v_align}]\007");
		1529	} else {
		1530	$self->old_bg_opts ($arg);
		1531	my $expr = $self->old_bg_expr;
		1532	$self->set_expr (parse_expr $expr) if $expr;
		1533	}
		1534	} elsif ($op eq "705") {
		1535	$self->{bg_opts}->{tint} = $arg;
		1536	my $expr = $self->old_bg_expr;
		1537	$self->set_expr (parse_expr $expr) if $expr;
		1538	}
		1539
		1540	1
		1541	}
		1542
		1543	sub find_resource {
		1544	my ($self, $res, $opt) = @_;
		1545
		1546	my $v = $self->x_resource ($opt);
		1547	$v = $self->x_resource ($res) unless defined $v;
		1548
		1549	$v
		1550	}
		1551
1124	sub on_start {	1552	sub on_start {
1125	my ($self) = @_;	1553	my ($self) = @_;
1126		1554
1127	my $expr = $self->x_resource ("%.expr")	1555	my $expr = $self->x_resource ("%.expr");
		1556
		1557	if (!$expr) {
		1558	$self->{bg_opts} = { h_scale => 100, v_scale => 100,
		1559	h_align => 50, v_align => 50 };
		1560
		1561	$self->{bg_opts}{shade} = $self->find_resource ("shading", "sh");
		1562	$self->{bg_opts}{tint} = $self->find_resource ("tintColor", "tint");
		1563	$self->{bg_opts}{blur} = $self->find_resource ("blurRadius", "blr");
		1564	$self->{bg_opts}{root} = $self->find_resource ("transparent", "tr");
		1565
		1566	$self->old_bg_opts ($self->find_resource ("backgroundPixmap", "pixmap"));
		1567	$expr = $self->old_bg_expr;
		1568	}
		1569
1128	or return;	1570	$expr or return;
1129
1130	$self->has_render
1131	or die "background extension needs RENDER extension 0.10 or higher, ignoring background-expr.\n";
1132		1571
1133	$self->set_expr (parse_expr $expr);	1572	$self->set_expr (parse_expr $expr);
1134	$self->{border} = $self->x_resource_boolean ("%.border");	1573	$self->{border} = $self->x_resource_boolean ("%.border");
1135		1574
1136	$MIN_INTERVAL = $self->x_resource ("%.interval");	1575	$MIN_INTERVAL = $self->x_resource ("%.interval");

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing rxvt-unicode/src/perl/background (file contents): Revision 1.75 by root, Fri Aug 10 20:07:11 2012 UTC vs. Revision 1.97 by root, Tue Sep 17 18:17:14 2019 UTC

Diff Legend

Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.75 by root, Fri Aug 10 20:07:11 2012 UTC vs.
Revision 1.97 by root, Tue Sep 17 18:17:14 2019 UTC