1 files changed, 99 insertions, 0 deletions
diff --git a/vcl/inc/graphic/GraphicFormatDetector.hxx b/vcl/inc/graphic/GraphicFormatDetector.hxx
new file mode 100644
index 000000000..dc1bbf0b3
--- /dev/null
+++ b/vcl/inc/graphic/GraphicFormatDetector.hxx
@@ -0,0 +1,99 @@
+/* -*- 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 .
+ */
+
+#ifndef INCLUDED_VCL_INC_GRAPHICFORMATDETECTOR_HXX
+#define INCLUDED_VCL_INC_GRAPHICFORMATDETECTOR_HXX
+
+#include <tools/stream.hxx>
+#include <vector>
+
+namespace vcl
+{
+/***
+ * This function is has two modes:
+ * - determine the file format when bTest = false
+ *   returns true, success
+ *   out rFormatExtension - on success: file format string
+ * - verify file format when bTest = true
+ *   returns false, if file type can't be verified
+ *           true, if the format is verified or the format is not known
+ */
+VCL_DLLPUBLIC bool peekGraphicFormat(SvStream& rStream, OUString& rFormatExtension, bool bTest);
+
+class VCL_DLLPUBLIC GraphicFormatDetector
+{
+public:
+    SvStream& mrStream;
+    OUString maExtension;
+
+    std::vector<sal_uInt8> maFirstBytes;
+    sal_uInt32 mnFirstLong;
+    sal_uInt32 mnSecondLong;
+
+    sal_uInt64 mnStreamPosition;
+    sal_uInt64 mnStreamLength;
+
+    OUString msDetectedFormat;
+
+    GraphicFormatDetector(SvStream& rStream, OUString const& rFormatExtension);
+
+    bool detect();
+
+    bool checkMET();
+    bool checkBMP();
+    bool checkWMForEMF();
+    bool checkPCX();
+    bool checkTIF();
+    bool checkGIF();
+    bool checkPNG();
+    bool checkJPG();
+    bool checkSVM();
+    bool checkPCD();
+    bool checkPSD();
+    bool checkEPS();
+    bool checkDXF();
+    bool checkPCT();
+    bool checkPBMorPGMorPPM();
+    bool checkRAS();
+    bool checkXPM();
+    bool checkXBM();
+    bool checkSVG();
+    bool checkTGA();
+    bool checkMOV();
+    bool checkPDF();
+    bool checkWEBP();
+
+private:
+    /**
+     * @brief Checks whether mrStream needs to be uncompressed and returns a pointer to the
+     * to aUncompressedBuffer or a pointer to maFirstBytes if it doesn't need to be uncompressed
+     *
+     * @param aUncompressedBuffer the buffer to hold the uncompressed data
+     * @param nSize the amount of bytes to uncompress
+     * @param nRetSize the amount of bytes actually uncompressed
+     * @return sal_uInt8* a pointer to maFirstBytes or aUncompressed buffer
+     */
+    sal_uInt8* checkAndUncompressBuffer(sal_uInt8* aUncompressedBuffer, sal_uInt32 nSize,
+                                        sal_uInt64& nDecompressedSize);
+};
+}
+
+#endif // INCLUDED_VCL_INC_GRAPHICFORMATDETECTOR_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */