vcl/inc/octree.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_VCL_INC_OCTREE_HXX
  21 #define INCLUDED_VCL_INC_OCTREE_HXX
  22
  23 #include <vcl/salbtype.hxx>
  24 #include <vcl/dllapi.h>
  25
  26 #define OCTREE_BITS     5
  27 #define OCTREE_BITS_1   10
  28
  29 typedef struct OctreeNode
  30 {
  31     sal_uLong       nCount;
  32     sal_uLong       nRed;
  33     sal_uLong       nGreen;
  34     sal_uLong       nBlue;
  35     OctreeNode* pChild[ 8 ];
  36     OctreeNode* pNext;
  37     OctreeNode* pNextInCache;
  38     sal_uInt16      nPalIndex;
  39     bool        bLeaf;
  40 } NODE;
  41
  42 typedef NODE*       PNODE;
  43 typedef PNODE*      PPNODE;
  44
  45 class ImpNodeCache;
  46 class BitmapReadAccess;
  47
  48 class VCL_PLUGIN_PUBLIC Octree
  49 {
  50 private:
  51
  52     BitmapPalette               aPal;
  53     sal_uLong                       nMax;
  54     sal_uLong                       nLeafCount;
  55     sal_uLong                       nLevel;
  56     PNODE                       pTree;
  57     PNODE                       pReduce[ OCTREE_BITS + 1 ];
  58     BitmapColor*                pColor;
  59     ImpNodeCache*               pNodeCache;
  60     const BitmapReadAccess*     pAcc;
  61     sal_uInt16                      nPalIndex;
  62
  63                                 Octree() {}
  64
  65     void                        CreatePalette( PNODE pNode );
  66     void                        GetPalIndex( PNODE pNode );
  67
  68     SAL_DLLPRIVATE void         ImplCreateOctree();
  69     SAL_DLLPRIVATE void         ImplDeleteOctree( PPNODE ppNode );
  70     SAL_DLLPRIVATE void         ImplAdd( PPNODE ppNode );
  71     SAL_DLLPRIVATE void         ImplReduce();
  72
  73 public:
  74
  75                                 Octree( const BitmapReadAccess& rReadAcc, sal_uLong nColors );
  76                                 ~Octree();
  77
  78     inline const BitmapPalette& GetPalette();
  79     inline sal_uInt16               GetBestPaletteIndex( const BitmapColor& rColor );
  80 };
  81
  82 inline const BitmapPalette& Octree::GetPalette()
  83 {
  84     aPal.SetEntryCount( (sal_uInt16) nLeafCount );
  85     nPalIndex = 0;
  86     CreatePalette( pTree );
  87     return aPal;
  88 }
  89
  90 inline sal_uInt16 Octree::GetBestPaletteIndex( const BitmapColor& rColor )
  91 {
  92     pColor = &(BitmapColor&) rColor;
  93     nPalIndex = 65535;
  94     nLevel = 0L;
  95     GetPalIndex( pTree );
  96     return nPalIndex;
  97 }
  98
  99 class VCL_PLUGIN_PUBLIC InverseColorMap
 100 {
 101 private:
 102
 103     sal_uInt8*              pBuffer;
 104     sal_uInt8*              pMap;
 105     const sal_uLong         nBits;
 106
 107     SAL_DLLPRIVATE void ImplCreateBuffers( const sal_uLong nMax );
 108
 109 public:
 110
 111     explicit            InverseColorMap( const BitmapPalette& rPal );
 112                         ~InverseColorMap();
 113
 114     inline sal_uInt16       GetBestPaletteIndex( const BitmapColor& rColor );
 115 };
 116
 117 inline sal_uInt16 InverseColorMap::GetBestPaletteIndex( const BitmapColor& rColor )
 118 {
 119     return pMap[ ( ( (sal_uLong) rColor.GetRed() >> nBits ) << OCTREE_BITS_1 ) |
 120                  ( ( (sal_uLong) rColor.GetGreen() >> nBits ) << OCTREE_BITS ) |
 121                  ( (sal_uLong) rColor.GetBlue() >> nBits ) ];
 122 }
 123
 124 #endif // INCLUDED_VCL_INC_OCTREE_HXX
 125
 126 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */