--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/platform/gl/gl-win32.c	Mon Sep 15 11:44:09 2025 +0200
@@ -0,0 +1,108 @@
+// Copyright (C) 2004-2021 Artifex Software, Inc.
+//
+// This file is part of MuPDF.
+//
+// MuPDF is free software: you can redistribute it and/or modify it under the
+// terms of the GNU Affero General Public License as published by the Free
+// Software Foundation, either version 3 of the License, or (at your option)
+// any later version.
+//
+// MuPDF 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 Affero General Public License for more
+// details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
+//
+// Alternative licensing terms are available from the licensor.
+// For commercial licensing, see <https://www.artifex.com/> or contact
+// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
+// CA 94129, USA, for further information.
+
+#ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
+#define _CRT_SECURE_NO_WARNINGS
+#include <windows.h>
+#include <commdlg.h>
+#include <shellapi.h>
+#include <stdio.h>
+
+#define OPEN_KEY(parent, name, ptr) \
+	RegCreateKeyExA(parent, name, 0, 0, 0, KEY_WRITE, 0, ptr, 0)
+#define SET_VALUE(parent, name, value) \
+	RegSetValueExA(parent, name, 0, REG_SZ, (const BYTE *)(value), (DWORD)strlen(value) + 1)
+
+void win_install(void)
+{
+	char command_str[2048], argv0[2048];
+	HKEY software, classes, mupdf;
+	HKEY supported_types, shell, open, command;
+	HKEY dotpdf, dotxps, dotcbz, dotepub, dotfb2;
+	HKEY pdf_progids, xps_progids, cbz_progids, epub_progids, fb2_progids;
+
+	GetModuleFileNameA(NULL, argv0, sizeof argv0);
+	_snprintf(command_str, sizeof command_str, "\"%s\" \"%%1\"", argv0);
+
+	OPEN_KEY(HKEY_CURRENT_USER, "Software", &software);
+	OPEN_KEY(software, "Classes", &classes);
+	{
+		OPEN_KEY(classes, "MuPDF", &mupdf);
+		{
+			OPEN_KEY(mupdf, "SupportedTypes", &supported_types);
+			{
+				SET_VALUE(supported_types, ".pdf", "");
+				SET_VALUE(supported_types, ".xps", "");
+				SET_VALUE(supported_types, ".cbz", "");
+				SET_VALUE(supported_types, ".epub", "");
+				SET_VALUE(supported_types, ".fb2", "");
+			}
+			RegCloseKey(supported_types);
+			OPEN_KEY(mupdf, "shell", &shell);
+			OPEN_KEY(shell, "open", &open);
+			OPEN_KEY(open, "command", &command);
+			{
+				SET_VALUE(open, "FriendlyAppName", "MuPDF");
+				SET_VALUE(command, "", command_str);
+			}
+			RegCloseKey(command);
+			RegCloseKey(open);
+			RegCloseKey(shell);
+		}
+		RegCloseKey(mupdf);
+
+		OPEN_KEY(classes, ".pdf", &dotpdf);
+		OPEN_KEY(classes, ".xps", &dotxps);
+		OPEN_KEY(classes, ".cbz", &dotcbz);
+		OPEN_KEY(classes, ".epub", &dotepub);
+		OPEN_KEY(classes, ".fb2", &dotfb2);
+		{
+			OPEN_KEY(dotpdf, "OpenWithProgids", &pdf_progids);
+			OPEN_KEY(dotxps, "OpenWithProgids", &xps_progids);
+			OPEN_KEY(dotcbz, "OpenWithProgids", &cbz_progids);
+			OPEN_KEY(dotepub, "OpenWithProgids", &epub_progids);
+			OPEN_KEY(dotfb2, "OpenWithProgids", &fb2_progids);
+			{
+				SET_VALUE(pdf_progids, "MuPDF", "");
+				SET_VALUE(xps_progids, "MuPDF", "");
+				SET_VALUE(cbz_progids, "MuPDF", "");
+				SET_VALUE(epub_progids, "MuPDF", "");
+				SET_VALUE(fb2_progids, "MuPDF", "");
+			}
+			RegCloseKey(pdf_progids);
+			RegCloseKey(xps_progids);
+			RegCloseKey(cbz_progids);
+			RegCloseKey(epub_progids);
+			RegCloseKey(fb2_progids);
+		}
+		RegCloseKey(dotpdf);
+		RegCloseKey(dotxps);
+		RegCloseKey(dotcbz);
+		RegCloseKey(dotepub);
+		RegCloseKey(dotfb2);
+	}
+	RegCloseKey(classes);
+	RegCloseKey(software);
+}
+
+#endif