How to preview images
Vifm v0.8 onward provides four macros describing preview area that can be used along with external applications to preview images in a terminal, they are:
%pxx coordinate of top-left corner of preview area;
%pyy coordinate of top-left corner of preview area;
%pwwidth of preview area;
%phheight of preview area.
Note that because terminals were built to display text rather than images, making them display images can be problematic. Some solutions work better in some environments than in others and none of them is perfect.
See issue #299 on GitHub for a command for OS X in iTerm2.
Below is a description and an example of making this work using
w3m on GNU/Linux.
Mind that the support is lacking and you might have trouble making this work in many terminals.
xterm without double-buffering tends to work better than others.
w3mimgdisplay which might be part of
w3m package or a separate one.
2. Terminal emulator without double buffering, otherwise
w3m will fail to display images properly.
1. Create script that invokes
w3mimgdisplay executable might reside in
different locations depending on the distribution. Below is a sample script, which can be used
after correcting several parameters at the top.
#!/bin/bash # # Based on script by z3bra -- 2014-01-21 W3MIMGDISPLAY="/usr/libexec/w3m/w3mimgdisplay" FONTH=15 # Size of one terminal row FONTW=7 # Size of one terminal column X=$1 Y=$2 COLUMNS=$3 LINES=$4 FILENAME=$5 read width height <<< `echo "5;$FILENAME" | $W3MIMGDISPLAY` if [ -z "$width" -o -z "$height" ]; then echo 'Error: Failed to obtain image size.' exit 1 fi x=$((FONTW * X)) y=$((FONTH * Y)) max_width=$((FONTW * COLUMNS)) max_height=$((FONTH * LINES)) if [ "$width" -gt "$max_width" ]; then height=$((height * max_width / width)) width=$max_width fi if [ "$height" -gt "$max_height" ]; then width=$((width * max_height / height)) height=$max_height fi w3m_command="0;1;$x;$y;$width;$height;;;;;$FILENAME\n4;\n3;" echo -e "$w3m_command" | $W3MIMGDISPLAY
2. Update vifmrc with preview command like the following:
fileviewer *.bmp,*.jpg,*.jpeg,*.png,*.gif,*.xpm \ imgt %px %py %pw %ph %c
Replace "imgt" with path to preview script or just update name if
script is available in your
$PATH (which is the case if you put it
State of terminal support
One should be aware that this is kinda hack as terminals weren't made to display pictures, thus there might be some difficulties (like double buffering or incomplete clearing). That said, it does work in sufficient amount of configurations.
When running inside terminal emulators, coordinates known to applications are relative to pane/window position. This should be taken into account, because without applying proper offsets images may appear in unexpected locations.
Depending on your terminal this may be enough or require additional
script for clearing image leftovers (below), development version of vifm and changed
:fileviewer command like this:
fileviewer *.bmp,*.jpg,*.jpeg,*.png,*.gif,*.xpm \ imgt %px %py %pw %ph %c \ %pc \ imgc %px %py %pw %ph
imgc is a script that clears background of the terminal (it's configuration is at the top):
#!/bin/bash W3MIMGDISPLAY="/usr/libexec/w3m/w3mimgdisplay" FONTH=15 # Size of one terminal row FONTW=7 # Size of one terminal column X=$1 Y=$2 COLUMNS=$3 LINES=$4 x=$((FONTW * X)) y=$((FONTH * Y)) erase="6;$x;$y;$(( FONTW*COLUMNS ));$(( FONTH*LINES ))\n3;" echo -e "$erase" | $W3MIMGDISPLAY
This is the case at least for