Merge pull request #340 from cplir-c/cplir-c-randomize-multi

add swww_randomize_multi.sh example script

example_scripts/swww_randomize_multi.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+
+# This script will randomly go through the files of a directory,
+# setting a different random wallpaper for each display
+# at regular intervals
+#
+# NOTE: this script is in bash (not posix shell), because the RANDOM variable
+# we use is not defined in posix
+
+if [[ $# -lt 1 ]] || [[ ! -d $1 ]]; then
+    echo "Usage:
+    $0 <dir containing images>"
+    exit 1
+fi
+
+# Make sure only 1 instance of swww_randomize
+PIDFILE=~/.local/state/swww-randomize-pidfile.txt
+if [ -e "${PIDFILE}" ]; then
+    OLD_PID="$(<${PIDFILE})"
+    if [ "X" != "X${OLD_PID}" -a -e "/proc/${OLD_PID}" ]; then
+        OLD_NAME="$(</proc/${OLD_PID}/comm)"
+        THIS_NAME="$(</proc/${BASHPID}/comm)"
+        if [ "${OLD_NAME}" = "${THIS_NAME}" ]; then
+            echo "old randomize process ${OLD_PID} is still running"
+            exit 1
+        else
+            echo "process with same ID as old randomize is running: \"${OLD_NAME}\"@${OLD_PID}"
+            echo "Replacing old process ID"
+        fi
+    fi
+fi
+echo "${BASHPID}" > ${PIDFILE}
+
+# Edit below to control the images transition
+export SWWW_TRANSITION_FPS=60
+export SWWW_TRANSITION_STEP=2
+
+# This controls (in seconds) when to switch to the next image
+INTERVAL=300
+
+# Possible values:
+#    -   no:   Do not resize the image
+#    -   crop: Resize the image to fill the whole screen, cropping out parts that don't fit
+#    -   fit:  Resize the image to fit inside the screen, preserving the original aspect ratio
+RESIZE_TYPE="fit"
+
+DISPLAY_LIST=$(swww query | grep -Po "^[^:]+")
+
+while true; do
+    find "$1" -type f \
+        | while read -r img; do
+            echo "$RANDOM:$img"
+        done \
+        | sort -n | cut -d':' -f2- \
+        | tee ~/.local/state/swww-randomize-list.txt \
+        | while read -r img; do
+            # Set a different image for each display
+            for disp in $DISPLAY_LIST; do
+                # if there is no image try to get one
+                if [ "X" = "X${img}" ]; then
+                    if read -r img; then
+                        true
+                    else # if there are no more images, refresh the list
+                        break 2
+                    fi
+                fi
+                swww img --resize=$RESIZE_TYPE --outputs $disp $img
+                # make sure each image is only used once
+                img=""
+            done
+            sleep $INTERVAL
+        done
+done