1 files changed, 83 insertions, 0 deletions
diff --git a/vcl/source/filter/jpeg/Exif.hxx b/vcl/source/filter/jpeg/Exif.hxx
new file mode 100644
index 000000000..287b7ae43
--- /dev/null
+++ b/vcl/source/filter/jpeg/Exif.hxx
@@ -0,0 +1,83 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <tools/stream.hxx>
+#include <tools/degree.hxx>
+
+namespace exif {
+
+enum Orientation {
+    TOP_LEFT        = 1,
+    TOP_RIGHT       = 2,
+    BOTTOM_RIGHT    = 3,
+    BOTTOM_LEFT     = 4,
+    LEFT_TOP        = 5,
+    RIGHT_TOP       = 6,
+    RIGHT_BOTTOM    = 7,
+    LEFT_BOTTOM     = 8
+};
+};
+
+enum Tag {
+    ORIENTATION         = 0x0112
+};
+
+class Exif final
+{
+private:
+    exif::Orientation maOrientation;
+    bool mbExifPresent;
+
+    bool processJpeg(SvStream& rStream, bool bSetValue);
+    bool processExif(SvStream& rStream, sal_uInt16 aLength, bool bSetValue);
+    void processIFD(sal_uInt8* pExifData, sal_uInt16 aLength, sal_uInt16 aOffset, sal_uInt16 aNumberOfTags, bool bSetValue, bool bLittleEndian);
+
+    struct ExifIFD {
+        sal_uInt8 tag[2];
+        sal_uInt8 type[2];
+        sal_uInt8 count[4];
+        sal_uInt8 offset[4];
+    };
+
+    struct TiffHeader {
+        sal_uInt16 byteOrder;
+        sal_uInt16 tagAlign;
+        sal_uInt32 offset;
+    };
+
+    static exif::Orientation convertToOrientation(sal_Int32 value);
+
+public:
+    Exif();
+
+    bool hasExif() const { return mbExifPresent;}
+
+    exif::Orientation getOrientation() const { return maOrientation;}
+    Degree10 getRotation() const;
+
+    void setOrientation(exif::Orientation orientation);
+
+    bool read(SvStream& rStream);
+    void write(SvStream& rStream);
+
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */