emfplus: create a wmf/emf/emf+ primitive based importer

First steps to organize an importer that can read/interpret
wmf/emf/emf+ and deliver a primitive representation for
the content by parsing it. Use the same mechanisms as
already applied for Svg, so to reuse abilities to keep
original binary data to allow save again and embedding in
files and have an implemented replacement bitmap based
representation. For this, unify the used helper classes
to handle more than just Svg. For 1st try, add test code
and static bool switches

Change-Id: I6e0a82943541d811a8f8d65a84115569fcd8cee7

1 files changed, 100 insertions, 0 deletions

diff --git a/include/vcl/vectorgraphicdata.hxx b/include/vcl/vectorgraphicdata.hxx
new file mode 100644
index 000000000000..f46be43489db
--- /dev/null
+++ b/include/vcl/vectorgraphicdata.hxx
@@ -0,0 +1,100 @@
+/* -*- 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_VECTORGRAPHICDATA_HXX
+#define INCLUDED_VCL_VECTORGRAPHICDATA_HXX
+
+#include <basegfx/range/b2drange.hxx>
+#include <com/sun/star/graphic/XPrimitive2D.hpp>
+#include <vcl/bitmapex.hxx>
+#include <rtl/ustring.hxx>
+#include <deque>
+
+
+typedef css::uno::Sequence<sal_Int8> VectorGraphicDataArray;
+
+
+// helper to convert any Primitive2DSequence to a good quality BitmapEx,
+// using default parameters and graphic::XPrimitive2DRenderer
+
+BitmapEx VCL_DLLPUBLIC convertPrimitive2DSequenceToBitmapEx(
+    const std::deque< css::uno::Reference< css::graphic::XPrimitive2D > >& rSequence,
+    const basegfx::B2DRange& rTargetRange,
+    const sal_uInt32 nMaximumQuadraticPixels = 500000);
+
+
+enum class VectorGraphicDataType
+{
+    Svg = 0,
+    Emf = 1,
+    Wmf = 2
+};
+
+class VCL_DLLPUBLIC VectorGraphicData
+{
+private:
+    // the file and length
+    VectorGraphicDataArray      maVectorGraphicDataArray;
+
+    // The absolute Path if available
+    OUString                    maPath;
+
+    // on demand created content
+    basegfx::B2DRange           maRange;
+    std::deque< css::uno::Reference< css::graphic::XPrimitive2D > >
+                                maSequence;
+    BitmapEx                    maReplacement;
+    size_t                      mNestedBitmapSize;
+    VectorGraphicDataType       meVectorGraphicDataType;
+
+    // on demand creators
+    void ensureReplacement();
+    void ensureSequenceAndRange();
+
+    VectorGraphicData(const VectorGraphicData&) = delete;
+    VectorGraphicData& operator=(const VectorGraphicData&) = delete;
+
+public:
+    VectorGraphicData(
+        const VectorGraphicDataArray& rVectorGraphicDataArray,
+        const OUString& rPath,
+        VectorGraphicDataType eVectorDataType); // = VectorGraphicDataType::Svg);
+    VectorGraphicData(
+        const OUString& rPath,
+        VectorGraphicDataType eVectorDataType);
+
+    /// data read
+    const VectorGraphicDataArray& getVectorGraphicDataArray() const { return maVectorGraphicDataArray; }
+    sal_uInt32 getVectorGraphicDataArrayLength() const { return maVectorGraphicDataArray.getLength(); }
+    enum class State { UNPARSED, PARSED };
+    std::pair<State, size_t> getSizeBytes();
+    const OUString& getPath() const { return maPath; }
+    const VectorGraphicDataType& getVectorGraphicDataType() const { return meVectorGraphicDataType; }
+
+    /// data read and evtl. on demand creation
+    const basegfx::B2DRange& getRange() const;
+    const std::deque< css::uno::Reference< css::graphic::XPrimitive2D > >& getPrimitive2DSequence() const;
+    const BitmapEx& getReplacement() const;
+};
+
+typedef std::shared_ptr< VectorGraphicData > VectorGraphicDataPtr;
+
+#endif // INCLUDED_VCL_VECTORGRAPHICDATA_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */