include/vcl/BitmapBasicMorphologyFilter.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  */
  10
  11 #ifndef INCLUDED_VCL_BITMAPBASICMORPHOLOGYFILTER_HXX
  12 #define INCLUDED_VCL_BITMAPBASICMORPHOLOGYFILTER_HXX
  13
  14 #include <vcl/bitmap.hxx>
  15 #include <vcl/bitmapex.hxx>
  16 #include <vcl/BitmapFilter.hxx>
  17
  18 enum class BasicMorphologyOp
  19 {
  20     erode,
  21     dilate
  22 };
  23
  24 /* Black is foreground, white is background */
  25 class VCL_DLLPUBLIC BitmapBasicMorphologyFilter : public BitmapFilter
  26 {
  27 public:
  28     BitmapBasicMorphologyFilter(BasicMorphologyOp op, sal_Int32 nRadius);
  29     BitmapBasicMorphologyFilter(BasicMorphologyOp op, sal_Int32 nRadius, sal_uInt8 nValueOutside);
  30     virtual ~BitmapBasicMorphologyFilter();
  31
  32     virtual BitmapEx execute(BitmapEx const& rBitmap) const override;
  33
  34 private:
  35     Bitmap filter(Bitmap const& rBitmap) const;
  36
  37     BasicMorphologyOp m_eOp;
  38     sal_Int32 m_nRadius;
  39     sal_uInt8 m_nValueOutside = 0;
  40     bool m_bUseValueOutside = false;
  41 };
  42
  43 class BitmapErodeFilter final : public BitmapBasicMorphologyFilter
  44 {
  45 public:
  46     BitmapErodeFilter(sal_Int32 nRadius)
  47         : BitmapBasicMorphologyFilter(BasicMorphologyOp::erode, nRadius)
  48     {
  49     }
  50     BitmapErodeFilter(sal_Int32 nRadius, sal_uInt8 nValueOutside)
  51         : BitmapBasicMorphologyFilter(BasicMorphologyOp::erode, nRadius, nValueOutside)
  52     {
  53     }
  54 };
  55
  56 class BitmapDilateFilter final : public BitmapBasicMorphologyFilter
  57 {
  58 public:
  59     BitmapDilateFilter(sal_Int32 nRadius)
  60         : BitmapBasicMorphologyFilter(BasicMorphologyOp::dilate, nRadius)
  61     {
  62     }
  63     BitmapDilateFilter(sal_Int32 nRadius, sal_uInt8 nValueOutside)
  64         : BitmapBasicMorphologyFilter(BasicMorphologyOp::dilate, nRadius, nValueOutside)
  65     {
  66     }
  67 };
  68
  69 #endif // INCLUDED_VCL_BITMAPBASICMORPHOLOGYFILTER_HXX
  70
  71 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */