st

my build of st - simple terminal
git clone git://git.kocotian.pl/st.git
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commit 0f8b40652bca0670f1f0bda069bbc55f8b5e364d
parent e6e2c6199f102f1459b53717050eee27832f4f87
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Sat, 30 May 2020 21:50:54 +0200

FAQ: add some details about the w3m img hack

... and an example patch to switch from double-buffering to a single buffer.

Diffstat:
MFAQ | 59++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 54 insertions(+), 5 deletions(-)

diff --git a/FAQ b/FAQ @@ -2,12 +2,14 @@ Use the excellent tool of [utmp](https://git.suckless.org/utmp/) for this task. + ## Some _random program_ complains that st is unknown/not recognised/unsupported/whatever! It means that st doesn’t have any terminfo entry on your system. Chances are you did not `make install`. If you just want to test it without installing it, you can manually run `tic -sx st.info`. + ## Nothing works, and nothing is said about an unknown terminal! * Some programs just assume they’re running in xterm i.e. they don’t rely on @@ -15,6 +17,7 @@ you can manually run `tic -sx st.info`. * Some programs don’t complain about the lacking st description and default to another terminal. In that case see the question about terminfo. + ## How do I scroll back up? * Using a terminal multiplexer. @@ -23,11 +26,13 @@ you can manually run `tic -sx st.info`. * Using the excellent tool of [scroll](https://git.suckless.org/scroll/). * Using the scrollback [patch](https://st.suckless.org/patches/scrollback/). + ## I would like to have utmp and/or scroll functionality by default You can add the absolute patch of both programs in your config.h file. You only have to modify the value of utmp and scroll variables. + ## Why doesn't the Del key work in some programs? Taken from the terminfo manpage: @@ -83,12 +88,14 @@ If you are using zsh, then read the zsh FAQ Putting these lines into your .zshrc will fix the problems. + ## How can I use meta in 8bit mode? St supports meta in 8bit mode, but the default terminfo entry doesn't use this capability. If you want it, you have to use the 'st-meta' value in TERM. + ## I cannot compile st in OpenBSD OpenBSD lacks librt, despite it being mandatory in POSIX @@ -97,6 +104,7 @@ If you want to compile st for OpenBSD you have to remove -lrt from config.mk, an st will compile without any loss of functionality, because all the functions are included in libc on this platform. + ## The Backspace Case St is emulating the Linux way of handling backspace being delete and delete being @@ -158,19 +166,60 @@ terminal users wants its backspace to be how he feels it: [1] http://www.ibb.net/~anne/keyboard.html [2] http://www.tldp.org/HOWTO/Keyboard-and-Console-HOWTO-5.html + ## But I really want the old grumpy behaviour of my terminal Apply [1]. [1] https://st.suckless.org/patches/delkey -## Why do images not work in st (in programs such as w3m)? -This is a terrible hack that overdraws an image on top of the terminal emulator -window. It also relies on a very specific way the terminal draws it's contents. +## Why do images not work in st using the w3m image hack? + +w3mimg uses a hack that draws an image on top of the terminal emulator Drawable +window. The hack relies on the terminal to use a single buffer to draw its +contents directly. + +st uses double-buffered drawing so the image is quickly replaced and may show a +short flicker effect. + +Below is a patch example to change st double-buffering to a single Drawable +buffer. + +diff --git a/x.c b/x.c +--- a/x.c ++++ b/x.c +@@ -561,10 +561,6 @@ xresize(int col, int row) + win.tw = MAX(1, col * win.cw); + win.th = MAX(1, row * win.ch); + +- XFreePixmap(xw.dpy, xw.buf); +- xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, +- DefaultDepth(xw.dpy, xw.scr)); +- XftDrawChange(xw.draw, xw.buf); + xclear(0, 0, win.w, win.h); + } + +@@ -921,8 +917,7 @@ xinit(void) + gcvalues.graphics_exposures = False; + dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures, + &gcvalues); +- xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, +- DefaultDepth(xw.dpy, xw.scr)); ++ xw.buf = xw.win; + XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel); + XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h); + +@@ -1386,8 +1381,6 @@ void + draw(void) + { + drawregion(0, 0, term.col, term.row); +- XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w, +- win.h, 0, 0); + XSetForeground(xw.dpy, dc.gc, + dc.col[IS_SET(MODE_REVERSE)? + defaultfg : defaultbg].pixel); -A more proper (but limited way) would be using sixels. Which st doesn't -support. ## BadLength X error in Xft when trying to render emoji