feat: new GDM greeter logo

Text in logo is capitalized (YourDev instead of yourdev)
Image file is installed in /usr/share/orange-yourdev-login

etc/dconf/db/gdm.d/01-logo

@@ -1,3 +1,3 @@
 [org/gnome/login-screen]
-logo='/usr/share/plymouth/yourdev-logo.png'
+logo='/usr/share/orange-yourdev-login/yourdev-logo.png'
 fallback-logo='/usr/share/plymouth/ubuntu-logo.png'

images/Makefile

@@ -0,0 +1,11 @@
+PNGS = yourdev-logo-min.png yourdev-logo-maj.png
+
+%.png: %.xcf
+	./xcf2png-one.sh $^ $@
+
+all: $(PNGS)
+
+clean:
+	rm -f $(PNGS)
+
+.DELETE_ON_ERROR:

images/xcf2png-all.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# taken from https://stackoverflow.com/a/5846727
+gimp -n -i -b - <<EOF
+(let* ( (file's (cadr (file-glob "*.xcf" 1))) (filename "") (image 0) (layer 0) )
+  (while (pair? file's) 
+    (set! image (car (gimp-file-load RUN-NONINTERACTIVE (car file's) (car file's))))
+    (set! layer (car (gimp-image-merge-visible-layers image CLIP-TO-IMAGE)))
+    (set! filename (string-append (substring (car file's) 0 (- (string-length (car file's)) 4)) ".png"))
+    (gimp-file-save RUN-NONINTERACTIVE image layer filename filename)
+    (gimp-image-delete image)
+    (set! file's (cdr file's))
+    )
+  (gimp-quit 0)
+  )
+EOF
+

images/xcf2png-one.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+if (( $# == 0 )) ; then
+    echo "Missing argument." >&2
+    exit 1
+fi
+
+INFILE="$1" OUTFILE="$2"
+if [[ ! -e "$INFILE" ]] ; then
+    echo "File not found: '$INFILE'" >&2
+    exit 1
+fi
+if [[ -z "$OUTFILE" ]] ; then
+    OUTFILE="$(basename "$INFILE" .xcf).png"
+fi
+
+# taken from https://stackoverflow.com/a/5846727
+gimp -n -i -b - <<EOF
+(let* ( (infile "${INFILE}") (outfile "${OUTFILE}") (image 0) (layer 0) )
+    (set! image (car (gimp-file-load RUN-NONINTERACTIVE infile infile)))
+    (set! layer (car (gimp-image-merge-visible-layers image CLIP-TO-IMAGE)))
+    (gimp-file-save RUN-NONINTERACTIVE image layer outfile outfile)
+    (gimp-image-delete image)
+  (gimp-quit 0)
+  )
+EOF
+