1 files changed, 83 insertions, 0 deletions
diff --git a/vcl/inc/bitmap/Octree.hxx b/vcl/inc/bitmap/Octree.hxx
new file mode 100644
index 0000000000..3c9b5eb270
--- /dev/null
+++ b/vcl/inc/bitmap/Octree.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 .
+ */
+
+#ifndef INCLUDED_VCL_INC_OCTREE_HXX
+#define INCLUDED_VCL_INC_OCTREE_HXX
+
+#include <vcl/dllapi.h>
+#include <vcl/BitmapColor.hxx>
+#include <vcl/BitmapPalette.hxx>
+#include <tools/solar.h>
+
+struct OctreeNode
+{
+    sal_uLong nCount = 0;
+    sal_uLong nRed = 0;
+    sal_uLong nGreen = 0;
+    sal_uLong nBlue = 0;
+    std::unique_ptr<OctreeNode> pChild[8];
+    OctreeNode* pNext = nullptr;
+    sal_uInt16 nPalIndex = 0;
+    bool bLeaf = false;
+};
+
+class BitmapReadAccess;
+
+class VCL_PLUGIN_PUBLIC Octree
+{
+private:
+    void CreatePalette(OctreeNode* pNode);
+    void GetPalIndex(const OctreeNode* pNode, BitmapColor const& color);
+
+    SAL_DLLPRIVATE void add(std::unique_ptr<OctreeNode>& rpNode, BitmapColor const& color);
+    SAL_DLLPRIVATE void reduce();
+
+    BitmapPalette maPalette;
+    sal_uLong mnLeafCount;
+    sal_uLong mnLevel;
+    std::unique_ptr<OctreeNode> pTree;
+    std::vector<OctreeNode*> mpReduce;
+    sal_uInt16 mnPalIndex;
+
+public:
+    Octree(const BitmapReadAccess& rReadAcc, sal_uLong nColors);
+    ~Octree();
+
+    const BitmapPalette& GetPalette();
+    sal_uInt16 GetBestPaletteIndex(const BitmapColor& rColor);
+};
+
+class InverseColorMap
+{
+private:
+    std::vector<sal_uInt8> mpBuffer;
+    std::vector<sal_uInt8> mpMap;
+
+    void ImplCreateBuffers();
+
+public:
+    explicit InverseColorMap(const BitmapPalette& rPal);
+    ~InverseColorMap();
+
+    sal_uInt16 GetBestPaletteIndex(const BitmapColor& rColor);
+};
+
+#endif // INCLUDED_VCL_INC_OCTREE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */