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Revision 1.152 by root, Wed Dec 12 19:56:37 2007 UTC vs.
Revision 1.175 by root, Mon Apr 12 17:06:55 2010 UTC

11B<rxvt-unicode>, version B<@@RXVT_VERSION@@>, is a colour vt102 terminal 11B<rxvt-unicode>, version B<@@RXVT_VERSION@@>, is a colour vt102 terminal
12emulator intended as an I<xterm>(1) replacement for users who do not 12emulator intended as an I<xterm>(1) replacement for users who do not
13require features such as Tektronix 4014 emulation and toolkit-style 13require features such as Tektronix 4014 emulation and toolkit-style
14configurability. As a result, B<rxvt-unicode> uses much less swap space -- 14configurability. As a result, B<rxvt-unicode> uses much less swap space --
15a significant advantage on a machine serving many X sessions. 15a significant advantage on a machine serving many X sessions.
16
17This document is also available on the World-Wide-Web at
18L<http://pod.tst.eu/http://cvs.schmorp.de/rxvt-unicode/doc/rxvt.1.pod>.
16 19
17=head1 FREQUENTLY ASKED QUESTIONS 20=head1 FREQUENTLY ASKED QUESTIONS
18 21
19See @@RXVT_NAME@@(7) (try C<man 7 @@RXVT_NAME@@>) for a list of 22See @@RXVT_NAME@@(7) (try C<man 7 @@RXVT_NAME@@>) for a list of
20frequently asked questions and answer to them and some common 23frequently asked questions and answer to them and some common
89 92
90Print out a message describing available options. 93Print out a message describing available options.
91 94
92=item B<-display> I<displayname> 95=item B<-display> I<displayname>
93 96
94Attempt to open a window on the named X display (B<-d> still 97Attempt to open a window on the named X display (the older form B<-d>
95respected). In the absence of this option, the display specified by the 98is still respected. but deprecated). In the absence of this option, the
96B<DISPLAY> environment variable is used. 99display specified by the B<DISPLAY> environment variable is used.
97 100
98=item B<-depth> I<bitdepth> 101=item B<-depth> I<bitdepth>
99 102
100Compile I<xft>: Attempt to find a visual with the given bit depth; 103Compile I<xft>: Attempt to find a visual with the given bit depth;
101resource B<depth>. 104resource B<depth>.
105
106[Please note that many X servers (and libXft) are buggy with
107respect to C<-depth 32> and/or alpha channels, and will cause all sorts
108of graphical corruption. This is harmless, but we can't do anything about
109this, so watch out]
102 110
103=item B<-geometry> I<geom> 111=item B<-geometry> I<geom>
104 112
105Window geometry (B<-g> still respected); resource B<geometry>. 113Window geometry (B<-g> still respected); resource B<geometry>.
106 114
174horizontal radii are considered to be the same. Setting one of the 182horizontal radii are considered to be the same. Setting one of the
175radii to 1 and another to a large number creates interesting effects 183radii to 1 and another to a large number creates interesting effects
176on some backgrounds. Maximum radius value is 128. Compile I<afterimage>; 184on some backgrounds. Maximum radius value is 128. Compile I<afterimage>;
177resource I<blurRadius>. 185resource I<blurRadius>.
178 186
187=item B<-icon> I<file>
188
189Compile I<afterimage>: Use the specified image as application icon. This
190is used by many window managers, taskbars and pagers to represent the
191application window; resource I<iconFile>.
192
179=item B<-bg> I<colour> 193=item B<-bg> I<colour>
180 194
181Window background colour; resource B<background>. 195Window background colour; resource B<background>.
182 196
183=item B<-fg> I<colour> 197=item B<-fg> I<colour>
242italic> >> characters are to be printed. See resource B<boldItalicFont> 256italic> >> characters are to be printed. See resource B<boldItalicFont>
243for details. 257for details.
244 258
245=item B<-is>|B<+is> 259=item B<-is>|B<+is>
246 260
247Compile I<font-styles>: Bold/Italic font styles imply high intensity 261Compile I<font-styles>: Bold/Blink font styles imply high intensity
248foreground/background (default). See resource B<intensityStyles> for 262foreground/background (default). See resource B<intensityStyles> for
249details. 263details.
250 264
251=item B<-name> I<name> 265=item B<-name> I<name>
252 266
270 284
271=item B<-sb>|B<+sb> 285=item B<-sb>|B<+sb>
272 286
273Turn on/off scrollbar; resource B<scrollBar>. 287Turn on/off scrollbar; resource B<scrollBar>.
274 288
289=item B<-sr>|B<+sr>
290
291Put scrollbar on right/left; resource B<scrollBar_right>.
292
293=item B<-st>|B<+st>
294
295Display rxvt (non XTerm/NeXT) scrollbar without/with a trough;
296resource B<scrollBar_floating>.
297
275=item B<-si>|B<+si> 298=item B<-si>|B<+si>
276 299
277Turn on/off scroll-to-bottom on TTY output inhibit; resource 300Turn on/off scroll-to-bottom on TTY output inhibit; resource
278B<scrollTtyOutput> has opposite effect. 301B<scrollTtyOutput> has opposite effect.
279 302
285=item B<-sw>|B<+sw> 308=item B<-sw>|B<+sw>
286 309
287Turn on/off scrolling with the scrollback buffer as new lines appear. 310Turn on/off scrolling with the scrollback buffer as new lines appear.
288This only takes effect if B<-si> is also given; resource 311This only takes effect if B<-si> is also given; resource
289B<scrollWithBuffer>. 312B<scrollWithBuffer>.
290
291=item B<-sr>|B<+sr>
292
293Put scrollbar on right/left; resource B<scrollBar_right>.
294
295=item B<-st>|B<+st>
296
297Display rxvt (non XTerm/NeXT) scrollbar without/with a trough;
298resource B<scrollBar_floating>.
299 313
300=item B<-ptab>|B<+ptab> 314=item B<-ptab>|B<+ptab>
301 315
302If enabled (default), "Horizontal Tab" characters are being stored as 316If enabled (default), "Horizontal Tab" characters are being stored as
303actual wide characters in the screen buffer, which makes it possible to 317actual wide characters in the screen buffer, which makes it possible to
307 321
308=item B<-bc>|B<+bc> 322=item B<-bc>|B<+bc>
309 323
310Blink the cursor; resource B<cursorBlink>. 324Blink the cursor; resource B<cursorBlink>.
311 325
326=item B<-uc>|B<+uc>
327
328Make the cursor underlined; resource B<cursorUnderline>.
329
312=item B<-iconic> 330=item B<-iconic>
313 331
314Start iconified, if the window manager supports that option. 332Start iconified, if the window manager supports that option.
315Alternative form is B<-ic>. 333Alternative form is B<-ic>.
316 334
332 350
333=item B<-bl> 351=item B<-bl>
334 352
335Compile I<frills>: Set MWM hints to request a borderless window, i.e. 353Compile I<frills>: Set MWM hints to request a borderless window, i.e.
336if honoured by the WM, the rxvt-unicode window will not have window 354if honoured by the WM, the rxvt-unicode window will not have window
337decorations; resource B<borderLess>. 355decorations; resource B<borderLess>. If the window manager does not
356support MWM hints (e.g. kwin), enables override-redirect mode.
338 357
339=item B<-override-redirect> 358=item B<-override-redirect>
340 359
341Compile I<frills>: Sets override-redirect on the window; resource 360Compile I<frills>: Sets override-redirect on the window; resource
342B<override-redirect>. 361B<override-redirect>.
351=item B<-lsp> I<number> 370=item B<-lsp> I<number>
352 371
353Compile I<frills>: Lines (pixel height) to insert between each row of 372Compile I<frills>: Lines (pixel height) to insert between each row of
354the display. Useful to work around font rendering problems; resource 373the display. Useful to work around font rendering problems; resource
355B<lineSpace>. 374B<lineSpace>.
375
376=item B<-letsp> I<number>
377
378Compile I<frills>: Amount to adjust the computed character width by
379to control overall letter spacing. Negative values will tighten up the
380letter spacing, positive values will space letters out more. Useful to
381work around odd font metrics; resource B<letterSpace>.
356 382
357=item B<-tn> I<termname> 383=item B<-tn> I<termname>
358 384
359This option specifies the name of the terminal type to be set in the 385This option specifies the name of the terminal type to be set in the
360B<TERM> environment variable. This terminal type must exist in the 386B<TERM> environment variable. This terminal type must exist in the
446 472
447Turn on/off hold window after exit support. If enabled, @@RXVT_NAME@@ 473Turn on/off hold window after exit support. If enabled, @@RXVT_NAME@@
448will not immediately destroy its window when the program executed within 474will not immediately destroy its window when the program executed within
449it exits. Instead, it will wait till it is being killed or closed by the 475it exits. Instead, it will wait till it is being killed or closed by the
450user; resource B<hold>. 476user; resource B<hold>.
477
478=item B<-cd> I<path>
479
480Sets the working directory for the shell (or the command specified via
481B<-e>). The I<path> must be an absolute path and it must exist for
482@@RXVT_NAME@@ to start; resource B<chdir>.
451 483
452=item B<-xrm> I<string> 484=item B<-xrm> I<string>
453 485
454Works like the X Toolkit option of the same name, by adding the I<string> 486Works like the X Toolkit option of the same name, by adding the I<string>
455as if it were specified in a resource file. Resource values specified this 487as if it were specified in a resource file. Resource values specified this
564=item B<depth:> I<bitdepth> 596=item B<depth:> I<bitdepth>
565 597
566Compile I<xft>: Attempt to find a visual with the given bit depth; 598Compile I<xft>: Attempt to find a visual with the given bit depth;
567option B<-depth>. 599option B<-depth>.
568 600
601=item B<buffered:> I<boolean>
602
603Compile I<xft>: Turn on/off double-buffering for xft (default enabled).
604On some card/driver combination enabling it slightly decreases
605performance, on most it greatly helps it. The slowdown is small, so it
606should normally be enabled.
607
569=item B<geometry:> I<geom> 608=item B<geometry:> I<geom>
570 609
571Create the window with the specified X window geometry [default 80x24]; 610Create the window with the specified X window geometry [default 80x24];
572option B<-geometry>. 611option B<-geometry>.
573 612
691 730
692Specify background blending type; option B<-blt>. 731Specify background blending type; option B<-blt>.
693 732
694=item B<blurRadius:> I<number> 733=item B<blurRadius:> I<number>
695 734
696Apply Gaussian Blurr with the specified radius to the transparent 735Apply gaussian blur with the specified radius to the transparent
697background image; option B<-blr>. 736background image; option B<-blr>.
737
738=item B<iconFile:> I<file>
739
740Set the application icon pixmap; option B<-icon>.
698 741
699=item B<scrollColor:> I<colour> 742=item B<scrollColor:> I<colour>
700 743
701Use the specified colour for the scrollbar [default #B2B2B2]. 744Use the specified colour for the scrollbar [default #B2B2B2].
702 745
721an integer number of images in that direction. No image will be magnified 764an integer number of images in that direction. No image will be magnified
722beyond 10 times its original size. The maximum permitted scale is 1000. 765beyond 10 times its original size. The maximum permitted scale is 1000.
723Additional operations can be specified after colon B<:op1:op2...>. 766Additional operations can be specified after colon B<:op1:op2...>.
724Supported operations are: 767Supported operations are:
725 768
726 tile force background image to be tiled and not scaled. Equivalent to 0x0, 769 tile force background image to be tiled and not scaled. Equivalent to 0x0
727 propscale will scale image keeping proportions, 770 propscale will scale image keeping proportions
728 auto will scale image to match window size. Equivalent to 100x100; 771 auto will scale image to match window size. Equivalent to 100x100
729 hscale will scale image horizontally to the window size; 772 hscale will scale image horizontally to the window size
730 vscale will scale image vertically to the window size; 773 vscale will scale image vertically to the window size
731 scale will scale image to match window size; 774 scale will scale image to match window size
732 root will tile image as if it was a root window background, auto-adjusting 775 root will tile image as if it was a root window background, auto-adjusting
733 whenever terminal window moves. 776 whenever terminal window moves
734 777
735If used in conjunction with B<-tr> option, the specified pixmap will be 778If used in conjunction with B<-tr> option, the specified pixmap will be
736blended over transparency image using either alpha-blending, or any 779blended over transparency image using either alpha-blending, or any
737other blending type, specified with B<-blt "type"> option. 780other blending type, specified with B<-blt "type"> option.
738 781
769it is named first) and thus defines the character cell grid to be 9 pixels 812it is named first) and thus defines the character cell grid to be 9 pixels
770wide and 15 pixels high. 813wide and 15 pixels high.
771 814
772The second font is just used to add additional unicode characters not in 815The second font is just used to add additional unicode characters not in
773the base font, likewise the third, which is unfortunately non-bold, but 816the base font, likewise the third, which is unfortunately non-bold, but
774the bold version of the font does contain less characters, so this is a 817the bold version of the font does contain fewer characters, so this is a
775useful supplement. 818useful supplement.
776 819
777The third font is an Xft font with aliasing turned off, and the characters 820The third font is an Xft font with aliasing turned off, and the characters
778are limited to the B<JIS 0208> codeset (i.e. japanese kanji). The font 821are limited to the B<JIS 0208> codeset (i.e. japanese kanji). The font
779contains other characters, but we are not interested in them. 822contains other characters, but we are not interested in them.
803text font will being used for the given style. 846text font will being used for the given style.
804 847
805=item B<intensityStyles:> I<boolean> 848=item B<intensityStyles:> I<boolean>
806 849
807When font styles are not enabled, or this option is enabled (B<True>, 850When font styles are not enabled, or this option is enabled (B<True>,
808option B<-is>, the default), bold and italic font styles imply high 851option B<-is>, the default), bold/blink font styles imply high
809intensity foreground/background colours. Disabling this option (B<False>, 852intensity foreground/background colours. Disabling this option (B<False>,
810option B<+is>) disables this behaviour, the high intensity colours are not 853option B<+is>) disables this behaviour, the high intensity colours are not
811reachable. 854reachable.
812 855
813=item B<selectstyle:> I<mode>
814
815Set mouse selection style to B<old> which is 2.20, B<oldword> which
816is xterm style with 2.20 old word selection, or anything else which
817gives xterm style selection. Only effective when the original (non-perl)
818selection code is in use.
819
820=item B<scrollstyle:> I<mode>
821
822Set scrollbar style to B<rxvt>, B<plain>, B<next> or B<xterm>. B<plain> is
823the author's favourite.
824
825=item B<title:> I<string> 856=item B<title:> I<string>
826 857
827Set window title string, the default title is the command-line 858Set window title string, the default title is the command-line
828specified after the B<-e> option, if any, otherwise the application 859specified after the B<-e> option, if any, otherwise the application
829name; option B<-title>. 860name; option B<-title>.
842=item B<urgentOnBell:> I<boolean> 873=item B<urgentOnBell:> I<boolean>
843 874
844B<True>: set the urgency hint for the wm on receipt of a bell character. 875B<True>: set the urgency hint for the wm on receipt of a bell character.
845B<False>: do not set the urgency hint [default]. 876B<False>: do not set the urgency hint [default].
846 877
878@@RXVT_NAME@@ resets the urgency hint on every focus change.
879
847=item B<visualBell:> I<boolean> 880=item B<visualBell:> I<boolean>
848 881
849B<True>: use visual bell on receipt of a bell character; option B<-vb>. 882B<True>: use visual bell on receipt of a bell character; option B<-vb>.
850B<False>: no visual bell [default]; option B<+vb>. 883B<False>: no visual bell [default]; option B<+vb>.
851 884
873 906
874 URxvt.print-pipe: cat > $(TMPDIR=$HOME mktemp urxvt.XXXXXX) 907 URxvt.print-pipe: cat > $(TMPDIR=$HOME mktemp urxvt.XXXXXX)
875 908
876This creates a new file in your home directory with the screen contents 909This creates a new file in your home directory with the screen contents
877every time you hit C<Print>. 910every time you hit C<Print>.
911
912=item B<scrollstyle:> I<mode>
913
914Set scrollbar style to B<rxvt>, B<plain>, B<next> or B<xterm>. B<plain> is
915the author's favourite.
878 916
879=item B<scrollBar:> I<boolean> 917=item B<scrollBar:> I<boolean>
880 918
881B<True>: enable the scrollbar [default]; option B<-sb>. B<False>: 919B<True>: enable the scrollbar [default]; option B<-sb>. B<False>:
882disable the scrollbar; option B<+sb>. 920disable the scrollbar; option B<+sb>.
969 1007
970=item B<cursorBlink:> I<boolean> 1008=item B<cursorBlink:> I<boolean>
971 1009
972B<True>: blink the cursor. B<False>: do not blink the cursor [default]; 1010B<True>: blink the cursor. B<False>: do not blink the cursor [default];
973option B<-bc>. 1011option B<-bc>.
1012
1013=item B<cursorUnderline:> I<boolean>
1014
1015B<True>: Make the cursor underlined. B<False>: Make the cursor a box [default];
1016option B<-uc>.
974 1017
975=item B<pointerBlank:> I<boolean> 1018=item B<pointerBlank:> I<boolean>
976 1019
977B<True>: blank the pointer when a key is pressed or after a set number 1020B<True>: blank the pointer when a key is pressed or after a set number
978of seconds of inactivity. B<False>: the pointer is always visible 1021of seconds of inactivity. B<False>: the pointer is always visible
1081 1124
1082=item B<secondaryScroll:> I<boolean> 1125=item B<secondaryScroll:> I<boolean>
1083 1126
1084Turn on/off secondary screen scroll (default enabled). If this 1127Turn on/off secondary screen scroll (default enabled). If this
1085option is enabled, scrolls on the secondary screen will change the 1128option is enabled, scrolls on the secondary screen will change the
1086scrollback buffer and switching to/from the secondary screen will 1129scrollback buffer and, when secondaryScreen is off, switching
1087instead scroll the screen up. 1130to/from the secondary screen will instead scroll the screen up.
1088 1131
1089=item B<hold>: I<boolean> 1132=item B<hold>: I<boolean>
1090 1133
1091Turn on/off hold window after exit support. If enabled, @@RXVT_NAME@@ 1134Turn on/off hold window after exit support. If enabled, @@RXVT_NAME@@
1092will not immediately destroy its window when the program executed within 1135will not immediately destroy its window when the program executed within
1093it exits. Instead, it will wait till it is being killed or closed by the 1136it exits. Instead, it will wait till it is being killed or closed by the
1094user. 1137user.
1138
1139=item B<chdir>: I<path>
1140
1141Sets the working directory for the shell (or the command specified via
1142B<-e>). The I<path> must be an absolute path and it must exist for
1143@@RXVT_NAME@@ to start. If it isn't specified then the current working
1144directory will be used; option B<-cd>.
1095 1145
1096=item B<keysym.>I<sym>: I<string> 1146=item B<keysym.>I<sym>: I<string>
1097 1147
1098Compile I<frills>: Associate I<string> with keysym I<sym>. The 1148Compile I<frills>: Associate I<string> with keysym I<sym>. The
1099intervening resource name B<keysym.> cannot be omitted. 1149intervening resource name B<keysym.> cannot be omitted.
1138when Control-Meta-c is being pressed": 1188when Control-Meta-c is being pressed":
1139 1189
1140 URxvt.keysym.M-C-c: command:\033]701;zh_CN.GBK\007 1190 URxvt.keysym.M-C-c: command:\033]701;zh_CN.GBK\007
1141 1191
1142If I<string> takes the form C<perl:STRING>, then the specified B<STRING> 1192If I<string> takes the form C<perl:STRING>, then the specified B<STRING>
1143is passed to the C<on_keyboard_command> perl handler. See the @@RXVT_NAME@@perl(3) 1193is passed to the C<on_user_command> perl handler. See the @@RXVT_NAME@@perl(3)
1144manpage. For example, the F<selection> extension (activated via 1194manpage. For example, the F<selection> extension (activated via
1145C<@@RXVT_NAME@@ -pe selection>) listens for C<selection:rot13> events: 1195C<@@RXVT_NAME@@ -pe selection>) listens for C<selection:rot13> events:
1146 1196
1147 URxvt.keysym.M-C-c: perl:selection:rot13 1197 URxvt.keysym.M-C-c: perl:selection:rot13
1148 1198
1206all instances, while B<perl-ext> is used for specific instances. 1256all instances, while B<perl-ext> is used for specific instances.
1207 1257
1208=item B<perl-eval>: I<string> 1258=item B<perl-eval>: I<string>
1209 1259
1210Perl code to be evaluated when all extensions have been registered. See 1260Perl code to be evaluated when all extensions have been registered. See
1211the @@RXVT_NAME@@perl(3) manpage. Due to security reasons, this resource 1261the @@RXVT_NAME@@perl(3) manpage.
1212will be ignored when running setuid/setgid.
1213 1262
1214=item B<perl-lib>: I<path> 1263=item B<perl-lib>: I<path>
1215 1264
1216Colon-separated list of additional directories that hold extension 1265Colon-separated list of additional directories that hold extension
1217scripts. When looking for extensions specified by the C<perl> resource, 1266scripts. When looking for extensions specified by the C<perl> resource,
1218@@RXVT_NAME@@ will first look in these directories and then in 1267@@RXVT_NAME@@ will first look in these directories and then in
1219F<@@RXVT_LIBDIR@@/urxvt/perl/>. Due to security reasons, this resource 1268F<@@RXVT_LIBDIR@@/urxvt/perl/>.
1220will be ignored when running setuid/setgid.
1221 1269
1222See the @@RXVT_NAME@@perl(3) manpage. 1270See the @@RXVT_NAME@@perl(3) manpage.
1223 1271
1224=item B<< selection.pattern-I<idx> >>: I<perl-regex> 1272=item B<< selection.pattern-I<idx> >>: I<perl-regex>
1225 1273
1247 1295
1248=item B<override-redirect>: I<boolean> 1296=item B<override-redirect>: I<boolean>
1249 1297
1250Compile I<frills>: Sets override-redirect for the terminal window, making 1298Compile I<frills>: Sets override-redirect for the terminal window, making
1251it almost invisible to window managers; option B<-override-redirect>. 1299it almost invisible to window managers; option B<-override-redirect>.
1300
1301=item B<iso14755:> I<boolean>
1302
1303Turn on/off ISO 14755 (default enabled).
1252 1304
1253=item B<iso14755_52:> I<boolean> 1305=item B<iso14755_52:> I<boolean>
1254 1306
1255Turn on/off ISO 14755 5.2 mode (default enabled). 1307Turn on/off ISO 14755 5.2 mode (default enabled).
1256 1308
1448Note that B<-rv> (B<"reverseVideo: True">) simulates reverse video by 1500Note that B<-rv> (B<"reverseVideo: True">) simulates reverse video by
1449always swapping the foreground/background colours. This is in contrast to 1501always swapping the foreground/background colours. This is in contrast to
1450I<xterm>(1) where the colours are only swapped if they have not otherwise 1502I<xterm>(1) where the colours are only swapped if they have not otherwise
1451been specified. For example, 1503been specified. For example,
1452 1504
1453=over 4
1454
1455=item B<@@RXVT_NAME@@ -fg Black -bg White -rv> 1505 @@RXVT_NAME@@ -fg Black -bg White -rv
1456 1506
1457would yield White on Black, while on I<xterm>(1) it would yield Black 1507would yield White on Black, while on I<xterm>(1) it would yield Black on
1458on White. 1508White.
1459
1460=back
1461 1509
1462=head2 ALPHA CHANNEL SUPPORT 1510=head2 ALPHA CHANNEL SUPPORT
1463 1511
1464If Xft support has been compiled in and as long as Xft/Xrender/X don't get 1512If Xft support has been compiled in and as long as Xft/Xrender/X don't get
1465their act together, rxvt-unicode will support C<rgba:rrrr/gggg/bbbb/aaaa> 1513their act together, rxvt-unicode will do it's own alpha channel management:
1466(recommended, but B<MUST> have 4 digits/component) colour specifications, 1514
1467in addition to the ones provided by X, where the additional A component 1515You can prefix any color with an opaquenes percentage enclosed in
1516brackets, i.e. C<[percent]>, where C<percent> is a decimal percentage
1517(0-100) that specifies the opacity of the color, where C<0> is completely
1518transparent and C<100> is completely opaque. For example, C<[50]red> is a
1519half-transparent red, while C<[95]#00ff00> is an almost opaque green. This
1520is the recommended format to specify transparency values, and works with
1521all ways to specify a colour.
1522
1523For complete control, rxvt-unicode also supports
1524C<rgba:rrrr/gggg/bbbb/aaaa> (exactly four hex digits/component) colour
1525specifications, where the additional C<aaaa> component specifies opacity
1468specifies opacity (alpha) values. The minimum value of C<0> is completely 1526(alpha) values. The minimum value of C<0000> is completely transparent,
1469transparent). You can also prefix any color with C<[percent]>, where 1527while C<ffff> is completely opaque). The two example colours from
1470C<percent> is a decimal percentage (0-100) that specifies the opacity of 1528earlier could also be specified as C<rgba:ff00/0000/0000/8000> and
1471the color, where C<0> is completely transparent and C<100> is completelxy 1529C<rgba:0000/ff00/0000/f332>.
1472opaque.
1473 1530
1474You probably need to specify B<"-depth 32">, too, and have the luck that 1531You probably need to specify B<"-depth 32">, too, to force a visual with
1475your X-server uses ARGB pixel layout, as X is far from just supporting 1532alpha channels, and have the luck that your X-server uses ARGB pixel
1476ARGB visuals out of the box, and rxvt-unicode just fudges around. 1533layout, as X is far from just supporting ARGB visuals out of the box, and
1534rxvt-unicode just fudges around.
1477 1535
1478For example, the following selects an almost completely transparent red 1536For example, the following selects an almost completely transparent black
1479background, and an almost opaque pink foreground: 1537background, and an almost opaque pink foreground:
1480 1538
1481 @@RXVT_NAME@@ -depth 32 -bg rgba:0000/0000/0000/aaaa -fg "[80]pink" 1539 @@RXVT_NAME@@ -depth 32 -bg rgba:0000/0000/0000/4444 -fg "[80]pink"
1482 1540
1483I<Please note that transparency of any kind if completely unsupported by 1541When not using a background image, then the interpretation of the
1484the author. Don't bug him with installation questions!> 1542alpha channel is up to your compositing manager (most interpret it as
1543transparency of course).
1544
1545When using a background pixmap or pseudo-transparency, then the background
1546colour will always behave as if it were completely transparent (so the
1547background image shows instead), regardless of how it was specified, while
1548other colours will either be transparent as specified (the background
1549image will show through) on servers supporting the RENDER extension, or
1550fully opaque on servers not supporting the RENDER EXTENSION.
1551
1552Please note that due to bugs in Xft, specifying alpha values might result
1553in garbage being displayed when the X-server does not support the RENDER
1554extension.
1485 1555
1486=head1 ENVIRONMENT 1556=head1 ENVIRONMENT
1487 1557
1488B<@@RXVT_NAME@@> sets and/or uses the following environment variables: 1558B<@@RXVT_NAME@@> sets and/or uses the following environment variables:
1489 1559
1523C<--with-terminfo=PATH>. 1593C<--with-terminfo=PATH>.
1524 1594
1525=item B<DISPLAY> 1595=item B<DISPLAY>
1526 1596
1527Used by @@RXVT_NAME@@ to connect to the display and set to the correct 1597Used by @@RXVT_NAME@@ to connect to the display and set to the correct
1528display in its child processes. 1598display in its child processes if C<-display> isn't used to override. It
1599defaults to C<:0> if it doesn't exist.
1529 1600
1530=item B<SHELL> 1601=item B<SHELL>
1531 1602
1532The shell to be used for command execution, defaults to C</bin/sh>. 1603The shell to be used for command execution, defaults to C</bin/sh>.
1533 1604

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