Only pass through scaling parameters when needed

dobu-run.sh

@@ -40,6 +40,12 @@ if [ "$(get_image_label "$image_name" net.typeblog.dobu.x11_required)" == "true"
   x11_required=true
 fi
 
+scaling_params_required=false
+
+if [ "$(get_image_label "$image_name" net.typeblog.dobu.scaling_params_required)" == "true" ]; then
+  scaling_params_required=true
+fi
+
 if [[ -n $PULSE_SERVER ]]; then # remove prefix
   host_pulse=${PULSE_SERVER#unix:}
 else # default guess
@@ -90,6 +96,11 @@ if $x11_required; then
   extra_args="$extra_args -v ${XORG_SRC}:/tmp/.X11-unix/X0 -e DISPLAY=:0"
 fi
 
+# Same for scaling params
+if $scaling_params_required; then
+  extra_args="$extra_args -e GDK_SCALE=$GDK_SCALE -e QT_SCALE_FACTOR=$QT_SCALE_FACTOR -e QT_SCREEN_SCALE_FACTORS=$QT_SCREEN_SCALE_FACTORS -e QT_AUTO_SCREEN_SCALE_FACTOR=$QT_AUTO_SCREEN_SCALE_FACTOR"
+fi
+
 # Expose Pipewire socket if it exists
 if [ -S "$XDG_RUNTIME_DIR/pipewire-0" ]; then
   extra_args="$extra_args -v $XDG_RUNTIME_DIR/pipewire-0:/xdg_runtime/pipewire-0"
@@ -141,11 +152,6 @@ podman run --rm "${podman_security_args[@]}" --name "$container_name" \
     -e TZ="$(date +%Z)" \
     `# SHM is needed by some browser engines (such as CEF used by Steam)`\
     --shm-size=1G \
-    `# Scaling parameters` \
-    -e GDK_SCALE="$GDK_SCALE" \
-    -e QT_SCALE_FACTOR="$QT_SCALE_FACTOR" \
-    -e QT_SCREEN_SCALE_FACTORS="$QT_SCREEN_SCALE_FACTORS" \
-    -e QT_AUTO_SCREEN_SCALE_FACTOR="$QT_AUTO_SCREEN_SCALE_FACTOR" \
     `# Use podman's init stub inside the container for better control` \
     --init \
     $extra_args "$image_name"