tmp_icon.sh: Script to quickly try out new launcher icons

People suggest new icons in png formats, and I'm tired of searching this
scripts, so let's push it to main

Change-Id: Ie3cb2f7f82383c60188ae8499ad64b61264435d8

graphics/tmp_icon.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/zsh
+# Using zsh allows floating point multiplication in $((...))
+
+mydir="$(dirname "$(realpath "$0")")"
+
+base_folder="$mydir/../vector-app/src/main/res/mipmap"
+
+file="$1"
+
+export_png_files() {
+    newfile="$1"
+    mdpi_w="$2"
+    mdpi_h="$3"
+    if [ -z "$mdpi_h" ]; then
+        mdpi_h="$mdpi_w"
+    fi
+    mkdir -p $base_folder-mdpi
+    mkdir -p $base_folder-hdpi
+    mkdir -p $base_folder-xhdpi
+    mkdir -p $base_folder-xxhdpi
+    mkdir -p $base_folder-xxxhdpi
+    convert "$file" -resize "${mdpi_w}x${mdpi_h}" "$base_folder-mdpi/$newfile"
+    convert "$file" -resize "${$((mdpi_w*1.5))%.*}x${$((mdpi_h*1.5))%.*}" "$base_folder-hdpi/$newfile"
+    convert "$file" -resize "${$((mdpi_w*2))%.*}x${$((mdpi_h*2))%.*}" "$base_folder-xhdpi/$newfile"
+    convert "$file" -resize "${$((mdpi_w*3))%.*}x${$((mdpi_h*3))%.*}" "$base_folder-xxhdpi/$newfile"
+    convert "$file" -resize "${$((mdpi_w*4))%.*}x${$((mdpi_h*4))%.*}" "$base_folder-xxxhdpi/$newfile"
+}
+
+export_png_files "ic_launcher_sc.png" 48
+
+file2="fg_$file"
+convert "$file" -gravity center -background none -extent 150%x150% "$file2"
+file="$file2"
+export_png_files "ic_launcher_foreground_sc.png" 72
+rm "$file2"