Restore the cloud in the social preview icon

.github/social-preview-src/render.py

@@ -29,6 +29,16 @@ def image_magick() -> list[str]:
     return [executable]
 
 
+def rsvg_convert() -> str:
+    # ImageMagick's internal SVG rasterizer silently drops elements with SVG
+    # filters, which removed the cloud from the PDrive icon. Librsvg renders
+    # the icon faithfully, including its feDropShadow filter.
+    executable = shutil.which("rsvg-convert")
+    if not executable:
+        raise SystemExit("Librsvg is required (rsvg-convert).")
+    return executable
+
+
 def main() -> int:
     source_dir = Path(__file__).resolve().parent
     repo_dir = source_dir.parents[1]
@@ -66,7 +76,6 @@ def main() -> int:
         overlay_svg = work_dir / "overlay.svg"
         overlay_png = work_dir / "overlay.png"
         canvas = work_dir / "background.png"
-        icon_source = work_dir / "icon-source.png"
         app_icon = work_dir / "icon.png"
         overlay_svg.write_text(overlay_text, encoding="utf-8")
 
@@ -79,19 +88,7 @@ def main() -> int:
             check=True,
         )
         subprocess.run(
-            command
-            + [
-                "-background",
-                "none",
-                str(icon),
-                "-resize",
-                "256x256",
-                str(icon_source),
-            ],
-            check=True,
-        )
-        subprocess.run(
-            command + [str(icon_source), "-resize", "142x142", str(app_icon)],
+            [rsvg_convert(), "-w", "142", "-h", "142", "-o", str(app_icon), str(icon)],
             check=True,
         )
         subprocess.run(

.github/workflows/check.yml

@@ -26,6 +26,7 @@ jobs:
             desktop-file-utils \
             gir1.2-ayatanaappindicator3-0.1 \
             gir1.2-gtk-3.0 \
+            librsvg2-bin \
             librsvg2-common \
             python3-cairo \
             python3-gi \