Generate animation assets from SVG

.gitignore

@@ -0,0 +1,3 @@
+build
+elementary/animation-*.png
+elementary/throbber-*.png

debian/control

@@ -2,7 +2,9 @@ Source: plymouth-theme-elementary
 Section: x11
 Priority: optional
 Maintainer: elementary OS Team <builds@elementary.io>
-Build-Depends: debhelper (>= 10.5.1)
+Build-Depends: debhelper (>= 10.5.1),
+               meson,
+               imagemagick
 Standards-Version: 4.5.0
 
 Package: plymouth-theme-elementary

debian/rules

@@ -1,4 +1,4 @@
 #!/usr/bin/make -f
 
 %:
-	dh $@
+	dh $@ --buildsystem=meson

meson.build

@@ -0,0 +1,7 @@
+project(
+    'io.elementary.plymouth-theme'
+)
+
+convert = find_program('convert')
+
+meson.add_install_script('meson/post_install.py')

meson/post_install.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+import os
+import shutil
+import subprocess
+
+install_dir = os.environ.get('MESON_INSTALL_PREFIX', '/usr')
+base_dir = os.environ.get('MESON_SOURCE_ROOT', '.')
+
+theme_dir = os.path.join(install_dir, 'share', 'plymouth', 'themes', 'elementary')
+
+STEPS = 12
+IMAGES_PER_STEP = 4
+SIZE = 38
+
+SVG = os.path.join(base_dir, 'data', 'throbber.svg')
+
+for i in range(0, STEPS):
+    STEP_BASE_IMAGE = os.path.join(theme_dir, 'throbber-{:04d}.png'.format(i * IMAGES_PER_STEP))
+
+    subprocess.call([
+        'convert',
+        '-background',
+        'none',
+        SVG,
+        STEP_BASE_IMAGE
+    ])
+
+    subprocess.call([
+        'convert',
+        '-background',
+        'none',
+        '-rotate',
+        '{:d}'.format(i * 30),
+        STEP_BASE_IMAGE,
+        STEP_BASE_IMAGE
+    ])
+
+    subprocess.call([
+        'convert',
+        '-background',
+        'none',
+        '-gravity',
+        'center',
+        '-extent',
+        '{:d}x{:d}'.format(SIZE, SIZE),
+        STEP_BASE_IMAGE,
+        STEP_BASE_IMAGE
+    ])
+
+    for j in range(1, IMAGES_PER_STEP):
+        STEP_IMAGE = os.path.join(theme_dir, 'throbber-{:04d}.png'.format(i * IMAGES_PER_STEP + j))
+        shutil.copyfile(
+            STEP_BASE_IMAGE,
+            STEP_IMAGE
+        )
+
+for i in range(0, STEPS * IMAGES_PER_STEP):
+    try:
+        shutil.copyfile(
+            os.path.join(theme_dir, 'throbber-{:04d}.png'.format(i)),
+            os.path.join(theme_dir, 'animation-{:04d}.png'.format(i))
+        )
+    except shutil.SameFileError:
+        pass