Switch to rsvg-convert for mdi generation (#3734)

scripts/build.sh

@@ -1,5 +1,9 @@
 #!/usr/bin/env bash
 
+if ! [ -x "$(command -v rsvg-convert)" ]; then
+  apt install -y librsvg2-bin
+fi
+
 # Copy folder, without symlinks, but use actual files instead
 mkdir -p build/_
 mkdir -p build/brands
@@ -21,30 +25,22 @@ find ./build -type f -name "icon.txt" | while read icon; do
   dir=$(dirname "${icon}")
   mdi=$(<${icon})
   mdi="${mdi##mdi:}"
-  mogrify \
-    -format png \
-    -density 6400 \
-    -background transparent \
-    -fill "rgb(0,171,248,1.0)" \
-    -opaque black \
-    -trim \
-    -resize 240x240 \
-    -gravity center \
-    -extent 256x256 \
-    -write "${dir}/icon.png" \
+  rsvg-convert \
+    --stylesheet scripts/mdi.css \
+    --keep-aspect-ratio \
+    --height 256 \
+    --width 256 \
+    --background-color transparent \
+    --output "${dir}/icon.png" \
     "mdi/svg/${mdi}.svg"
 
-  mogrify \
-    -format png \
-    -density 6400 \
-    -background transparent \
-    -fill "rgb(0,171,248,1.0)" \
-    -opaque black \
-    -trim \
-    -resize 480x480 \
-    -gravity center \
-    -extent 512x512 \
-    -write "${dir}/icon@2x.png" \
+  rsvg-convert \
+    --stylesheet scripts/mdi.css \
+    --keep-aspect-ratio \
+    --height 512 \
+    --width 512 \
+    --background-color transparent \
+    --output "${dir}/icon@2x.png" \
     "mdi/svg/${mdi}.svg"
 
   optipng -silent "${dir}/icon.png" "${dir}/icon@2x.png"

scripts/mdi.css

@@ -0,0 +1,3 @@
+svg {
+    fill: rgb(0,171,248,1.0);
+}