qubes.GetImageRGBA: fix SVG conversion for images without explicit dimensions

qubes-rpc/qubes.GetImageRGBA

@@ -21,22 +21,29 @@ elif ! [ -r "${filename}" ]; then
     exit 1
 fi
 
-s="$(gm identify -format '%w %h %m' "$filename")"
-w="$(echo "$s"|cut -d " " -f 1)"
-h="$(echo "$s"|cut -d " " -f 2)"
-m="$(echo "$s"|cut -d " " -f 3)"
+read -r w h m << EOF
+$(gm identify -format '%w %h %m' "$filename")
+EOF
 if [ "$m" = SVG ]; then
     tmpfile2="$(mktemp /tmp/qimg-XXXXXXXX.png)"
-    rsvg-convert -w "$w" -h "$h" -o "$tmpfile2" "$filename"
+    if [ -n "$w" ] && [ "$w" -gt 0 ] && [ -n "$h" ] && [ "$h" -gt 0 ]; then
+        rsvg-convert -w "$w" -h "$h" -o "$tmpfile2" "$filename"
+    else
+        rsvg-convert -o "$tmpfile2" "$filename"
+        # re-read dimensions from the rendered PNG since SVG had no explicit size
+        read -r w h << EOF
+$(gm identify -format '%w %h' "$tmpfile2")
+EOF
+    fi
     # downscale the image if necessary
     if [ -n "$forcemaxsize" ] && \
             { [ "$w" -gt "$forcemaxsize" ] || [ "$h" -gt "$forcemaxsize" ]; }; then
         gm convert "$tmpfile2" -scale "${forcemaxsize}x${forcemaxsize}" "$tmpfile2"
     fi
     # read the size again, because icon may not be a square or could have changed with convert
-    s="$(gm identify -format '%w %h' "$tmpfile2")"
-    w="$(echo "$s"|cut -d " " -f 1)"
-    h="$(echo "$s"|cut -d " " -f 2)"
+    read -r w h << EOF
+$(gm identify -format '%w %h' "$tmpfile2")
+EOF
     filename="$tmpfile2"
 fi
 echo "$w $h"

qubesagent/test_getimgrgba.py

@@ -0,0 +1,118 @@
+#!/usr/bin/env python3
+# The Qubes OS Project, https://www.qubes-os.org/
+#
+# Copyright (C) 2026 Jayant Saxena <jayantmcom@gmail.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+"""Unit tests for qubes.GetImageRGBA script.
+
+Tests the fix for QubesOS/qubes-issues#9145: SVG images without explicit
+width/height attributes should be converted successfully.
+"""
+
+import os
+import shutil
+import subprocess
+import tempfile
+import unittest
+
+SCRIPT_PATH = os.path.join(
+    os.path.dirname(__file__), '../qubes-rpc/qubes.GetImageRGBA')
+
+# Minimal SVG with explicit width/height
+SVG_WITH_DIMENSIONS = b'''\
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="10" height="10">
+  <rect width="10" height="10" fill="#3366cc"/>
+</svg>
+'''
+
+# SVG with only viewBox, no explicit width/height (reproduces issue #9145)
+SVG_WITHOUT_DIMENSIONS = b'''\
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 10 10">
+  <rect width="10" height="10" fill="#3366cc"/>
+</svg>
+'''
+
+
+def _run_script(svg_content):
+    """Run qubes.GetImageRGBA with given SVG content, return (returncode, stdout, stderr)."""
+    with tempfile.NamedTemporaryFile(suffix='.svg', delete=False) as f:
+        f.write(svg_content)
+        svg_path = f.name
+    try:
+        result = subprocess.run(
+            [SCRIPT_PATH],
+            input=svg_path.encode() + b'\n',
+            capture_output=True,
+            timeout=10,
+        )
+        return result.returncode, result.stdout, result.stderr
+    finally:
+        os.unlink(svg_path)
+
+
+@unittest.skipUnless(
+    os.path.exists(SCRIPT_PATH), 'qubes.GetImageRGBA script not found')
+@unittest.skipUnless(
+    shutil.which('gm'), 'GraphicsMagick (gm) not installed')
+@unittest.skipUnless(
+    shutil.which('rsvg-convert'), 'rsvg-convert not installed')
+class TestGetImageRGBA(unittest.TestCase):
+
+    def _assert_valid_rgba_output(self, stdout, stderr):
+        """Assert stdout contains valid 'W H\\nRGBA_DATA' output."""
+        self.assertEqual(b'', stderr, f'Unexpected stderr: {stderr.decode()}')
+        lines = stdout.split(b'\n', 1)
+        self.assertGreaterEqual(len(lines), 1)
+        dims = lines[0].decode().split()
+        self.assertEqual(len(dims), 2, f'Expected "W H" on first line, got: {lines[0]}')
+        width, height = int(dims[0]), int(dims[1])
+        self.assertGreater(width, 0)
+        self.assertGreater(height, 0)
+        if len(lines) > 1:
+            expected = width * height * 4
+            self.assertGreaterEqual(len(lines[1]), expected)
+        return width, height
+
+    def test_svg_with_explicit_dimensions(self):
+        """SVG with explicit width/height should convert successfully."""
+        rc, stdout, stderr = _run_script(SVG_WITH_DIMENSIONS)
+        self.assertEqual(rc, 0, f'Script failed: {stderr.decode()}')
+        self._assert_valid_rgba_output(stdout, b'')
+
+    def test_svg_without_dimensions(self):
+        """SVG without explicit width/height (only viewBox) should convert successfully.
+
+        Regression test for QubesOS/qubes-issues#9145.
+        """
+        rc, stdout, stderr = _run_script(SVG_WITHOUT_DIMENSIONS)
+        self.assertEqual(rc, 0, f'Script failed: {stderr.decode()}')
+        self._assert_valid_rgba_output(stdout, b'')
+
+    def test_nonexistent_file(self):
+        """Non-existent file should cause script to exit with non-zero code."""
+        result = subprocess.run(
+            [SCRIPT_PATH],
+            input=b'/nonexistent/file.svg\n',
+            capture_output=True,
+            timeout=10,
+        )
+        self.assertNotEqual(result.returncode, 0)
+
+
+if __name__ == '__main__':
+    unittest.main()

rpm_spec/core-agent.spec.in

@@ -1079,6 +1079,7 @@ rm -f %{name}-%{version}
 %{python3_sitelib}/qubesagent/xdg.py*
 %{python3_sitelib}/qubesagent/test_xdg.py*
 %{python3_sitelib}/qubesagent/test_tools.py*
+%{python3_sitelib}/qubesagent/test_getimgrgba.py*
 
 %dir /usr/share/qubes/mime-override
 /usr/share/qubes/mime-override/globs