charger: add lineage charger

Add a new charger as a possible replacement for the AOSP charger.

Co-Authored-By: Tim Zimmermann <tim@linux4.de>
Change-Id: Icdf7ad770bb353f082759b76fd4e58910e8d72e3

charger/regenerate.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+if [ -z "$(which convert)" ] || [ -z "$(which pngcrush)" ]; then
+    echo "Please install imagemagick and pngcrush"
+    exit 1
+fi
+
+for DENSITY in mdpi:160 hdpi:240 xhdpi:320 xxhdpi:480 xxxhdpi:640; do
+    DPI=$(echo $DENSITY | cut -f1 -d ':')
+    WIDTH=$(echo $DENSITY | cut -f2 -d ':')
+
+    rm -rf $DPI
+    mkdir $DPI
+
+    for SVG in svg/*.svg; do
+        PNG="$DPI/$(basename $SVG | cut -f1 -d '.').png"
+        convert -density $WIDTH -resize ${WIDTH}x${WIDTH} $SVG $PNG
+    done
+
+    SCALEFILE="$DPI/battery_scale.png"
+    SCALEFILES="$(ls $DPI/battery_scale_*.png)"
+    FRAMES="$(ls -l $SCALEFILES | wc -l)"
+    SCALEHEIGHT=$(($WIDTH * $FRAMES))
+
+    convert -size ${WIDTH}x${SCALEHEIGHT} canvas:black $SCALEFILES -fx "u[j%$FRAMES+1].p{i,int(j/$FRAMES)}" png24:$SCALEFILE.tmp
+    pngcrush -text b "Frames" "$FRAMES" $SCALEFILE.tmp $SCALEFILE
+    rm $SCALEFILES $SCALEFILE.tmp
+done