Add DICOM image support to ImageViewer plugin #1866

This is not a permanent support and will be adjusted to the plugin later.

QuickLook.Plugin/QuickLook.Plugin.ImageViewer/MetaProvider.Discom.cs

@@ -0,0 +1,53 @@
+// Copyright © 2017-2026 QL-Win Contributors
+//
+// This file is part of QuickLook program.
+//
+// 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 3 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, see <http://www.gnu.org/licenses/>.
+
+using FellowOakDicom;
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Windows;
+
+namespace QuickLook.Plugin.ImageViewer;
+
+public partial class MetaProvider
+{
+    private static bool IsDicomFile(string path)
+    {
+        var extension = Path.GetExtension(path);
+        return extension.Equals(".dcm", StringComparison.OrdinalIgnoreCase)
+            || extension.Equals(".dicom", StringComparison.OrdinalIgnoreCase);
+    }
+
+    private static Size TryGetDicomSize(string path)
+    {
+        try
+        {
+            var file = DicomFile.Open(path);
+            var rows = file.Dataset.GetSingleValueOrDefault(DicomTag.Rows, 0);
+            var columns = file.Dataset.GetSingleValueOrDefault(DicomTag.Columns, 0);
+
+            if (rows > 0 && columns > 0)
+                return new Size(columns, rows);
+        }
+        catch (Exception e)
+        {
+            Debug.WriteLine(e);
+        }
+
+        return Size.Empty;
+    }
+}