include/vcl/BitmapPalette.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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  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_BITMAPPALETTE_HXX
  21 #define INCLUDED_VCL_BITMAPPALETTE_HXX
  22
  23 #include <vcl/dllapi.h>
  24 #include <vcl/BitmapColor.hxx>
  25 #include <vcl/checksum.hxx>
  26 #include <vector>
  27
  28 class VCL_DLLPUBLIC BitmapPalette
  29 {
  30     friend class SalBitmap;
  31     friend class BitmapAccess;
  32
  33 private:
  34
  35     std::vector<BitmapColor> maBitmapColor;
  36
  37 public:
  38
  39     SAL_DLLPRIVATE const BitmapColor* ImplGetColorBuffer() const
  40     {
  41         return maBitmapColor.data();
  42     }
  43
  44     SAL_DLLPRIVATE BitmapColor* ImplGetColorBuffer()
  45     {
  46         return maBitmapColor.data();
  47     }
  48
  49     BitmapChecksum GetChecksum() const
  50     {
  51         return vcl_get_checksum(0, maBitmapColor.data(), maBitmapColor.size() * sizeof(BitmapColor));
  52     }
  53
  54 public:
  55
  56     BitmapPalette()
  57     {
  58     }
  59
  60     BitmapPalette(sal_uInt16 nCount)
  61         : maBitmapColor(nCount)
  62     {
  63     }
  64
  65     bool operator==( const BitmapPalette& rBitmapPalette ) const
  66     {
  67         return maBitmapColor == rBitmapPalette.maBitmapColor;
  68     }
  69
  70     bool operator!=(const BitmapPalette& rBitmapPalette) const
  71     {
  72         return !( *this == rBitmapPalette );
  73     }
  74
  75     bool operator!() const
  76     {
  77         return maBitmapColor.empty();
  78     }
  79
  80     sal_uInt16 GetEntryCount() const
  81     {
  82         return maBitmapColor.size();
  83     }
  84
  85     void SetEntryCount(sal_uInt16 nCount)
  86     {
  87         maBitmapColor.resize(nCount);
  88     }
  89
  90     const BitmapColor& operator[](sal_uInt16 nIndex) const
  91     {
  92         assert(nIndex < maBitmapColor.size() && "Palette index is out of range");
  93         return maBitmapColor[nIndex];
  94     }
  95
  96     BitmapColor& operator[](sal_uInt16 nIndex)
  97     {
  98         assert(nIndex < maBitmapColor.size() && "Palette index is out of range");
  99         return maBitmapColor[nIndex];
 100     }
 101
 102     sal_uInt16 GetBestIndex(const BitmapColor& rCol) const
 103     {
 104         sal_uInt16 nRetIndex = 0;
 105
 106         if (!maBitmapColor.empty())
 107         {
 108             for (size_t j = 0; j < maBitmapColor.size(); ++j)
 109             {
 110                 if (rCol == maBitmapColor[j])
 111                 {
 112                     return j;
 113                 }
 114             }
 115
 116             sal_uInt16 nLastErr = SAL_MAX_UINT16;
 117             for (size_t i = 0; i < maBitmapColor.size(); ++i)
 118             {
 119                 const sal_uInt16 nActErr = rCol.GetColorError(maBitmapColor[i]);
 120                 if ( nActErr < nLastErr )
 121                 {
 122                     nLastErr = nActErr;
 123                     nRetIndex = i;
 124                 }
 125             }
 126         }
 127
 128         return nRetIndex;
 129     }
 130
 131     /// Returns true if the palette is 8-bit grey palette.
 132     bool IsGreyPalette8Bit() const;
 133     /// Returns true if the palette is a grey palette (may not be 8-bit).
 134     bool IsGreyPaletteAny() const;
 135 };
 136
 137 #endif // INCLUDED_VCL_BITMAPPALETTE_HXX
 138
 139 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */