Create stitchWP.sh

stitchWP.sh

@@ -0,0 +1,163 @@
+#!/usr/bin/env bash
+########################################################################
+# This script is a workaround for the lack of support from pcfman-qt   
+# for wallpaper in multiple display environment. pcmanfm-qt handle all 
+# the monitors as only one big monitor. This script takes the configuration from 
+# pcfman-qt and replicate it in all the monitors creating a big canvas 
+# and stitching the image to it. The steps are                                        
+# 1) Takes the pxfman-qt configuration
+# 2) It takes current display configuration from xrandr.
+# 3) Create new wallpaper image repeating the original wallpaper to match the monitors
+# 4) Updates the wallpaper with the created image                  
+########################################################################
+PROFILE="lxqt" #profile used when running pcmanfm-qt --desktop
+wpNew="$HOME/.config/pcmanfm-qt/$PROFILE/stitchWP.jpg" #where stitched wallpaper is saved, extension from source file.
+settingsFile="$HOME/.config/pcmanfm-qt/$PROFILE/settings.conf"
+changeWP="pcmanfm-qt --set-wallpaper" #command to use to change the wallpaper, at the end the new file is concatenated to this command.
+
+#########################################################################
+#Get actual wallpaper configuration
+wpFile=$(grep 'Wallpaper=' $settingsFile)
+wpFile=${wpFile:10}
+
+wpM=$(grep 'WallpaperMode=' $settingsFile)
+wpM=${wpM:14}
+
+wpBg=$(grep 'BgColor=' $settingsFile)
+wpBg=${wpBg:8}
+
+if [ $wpFile == $wpNew ]; then
+	exit
+fi
+
+#Get dimensions of original image
+imageInfo=$(identify $wpFile | grep -o '[1-9][0-9]*x[1-9][0-9]* ')
+IFS='x'
+j=0
+for STRING in $imageInfo; do
+	case $j in 
+		0)
+			wImage=$STRING;;
+		1)
+			hImage=$STRING;;
+	esac
+	j=$((j + 1))
+done
+
+case $wpM in
+	tile)
+		exit;;
+	none)
+		exit;;
+esac
+
+##############################################################################################################
+# Get current display configurator
+# xrandr regex, + don't have to be escaped in grep.
+# xrandr | grep -oe 'current [1-9][0-9]* x [1-9][0-9]*' -oe '[1-9][0-9]*x[1-9][0-9]*+[0-9]*+[0-9]*'
+XOUT=$(xrandr | grep -oe 'current [1-9][0-9]* x [1-9][0-9]*' -oe '[1-9][0-9]*x[1-9][0-9]*+[0-9]*+[0-9]*')
+IFS=$'\n' #separate to lines with internal field separator
+dispNumber=0
+for LINE in $XOUT; do
+	array[$dispNumber]=$LINE
+	dispNumber=$((dispNumber + 1))
+done
+dispNumber=$((dispNumber - 1)) #number of displays used
+
+#parse the total screen xinerama size.
+IFS=' ' #separate to lines with internal field separator
+i=0
+for STRING in ${array[0]}; do
+	case $i in 
+		1)
+			canvasW=$STRING;;
+		3)
+			canvasH=$STRING;;
+	esac
+	i=$((i + 1))
+done
+########################################################
+#if canvas == actual image
+#IF ((canvasW==wImagen) && (canvasH==hImagen))
+#exit
+########################################################
+#Parse each screen size and position
+for ((i=1; i <= $dispNumber ; i++)); do
+	IFS='x'
+	j=0
+	for STRING in ${array[$i]}; do
+		case $j in 
+			0)
+				w[$i]=$STRING
+				;;
+			1)
+				IFS='+'
+				k=0
+				for CHUNK in $STRING; do
+					case $k in 
+						0)
+							h[$i]=$CHUNK;;
+						1)
+							x[$i]=$CHUNK;;
+						2)
+							y[$i]=$CHUNK;;
+					esac
+					k=$((k + 1))
+				done
+		esac
+		j=$((j + 1))
+	done
+done
+
+case $wpM in
+	stretch)
+		newImage="convert -size "$canvasW"x"$canvasH" xc:"$wpBg""
+		for ((i=1; i <= $dispNumber ; i++)); do
+			newImage="$newImage -draw \"image over ${x[$i]},${y[$i]} ${w[$i]},${h[$i]} '"$wpFile"'\""
+		done
+		newImage="$newImage $wpNew"
+		#echo $newImage
+		eval $newImage
+	;;
+	fit)
+		newImage="convert -size "$canvasW"x"$canvasH" xc:"$wpBg" "
+		#mantain aspect ratio, it fit the screen from the inside, could not cover the whole screen background color could be seen.
+		for ((i=1; i <= $dispNumber ; i++)); do	
+			wRatio[$i]=$((${w[$i]} * 100 / $wImage))
+			#echo ${wRatio[$i]}
+			hRatio[$i]=$((${h[$i]} * 100 / $hImage))
+			#echo ${hRatio[$i]}
+
+			if [ ${wRatio[$i]} -lt ${hRatio[$i]} ]; then #fit horizontal, space up and down.
+				Y=$(($hImage * wRatio[$i] / 100))
+				Y=$((${h[$i]} - $Y))
+				Y=$(($Y / 2 + y[i]))
+				W=$(($wImage * wRatio[$i] / 100))
+				H=$(($hImage * wRatio[$i] / 100))
+				newImage="$newImage -draw \"image over ${x[$i]},$Y $W,$H '"$wpFile"'\""
+			else #fit vertical, space on sides
+				X=$(($wImage * hRatio[$i] / 100))
+				X=$((${w[$i]} - $X))
+				X=$(($X / 2 + x[i]))
+				W=$(($wImage * hRatio[$i] / 100))
+				H=$(($hImage * hRatio[$i] / 100))
+				newImage="$newImage -draw \"image over $X,${y[$j]} $W,$H '"$wpFile"'\""
+			fi
+		done
+		newImage="$newImage $wpNew"
+		#echo $newImage
+		eval $newImage
+	;;
+	center) #image is NOT scaled. If image is not croped n+1 could superpose x<n+1 iamge
+	;;
+	zoom) #image is scaled maintaining ratio, MUST cover the whole screen, pieces of image could be ot of screen.If image is not croped n+1 could superpose x<n+1 iamge
+	;;
+	#tile) #not needed
+	#none) #not needed
+esac
+
+#Set New Wallpaper
+changeWP="$changeWP $wpNew"
+echo $changeWP
+eval $changeWP
+