include/vcl/bitmap/BitmapMonochromeFilter.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 #pragma once
  12
  13 #include <vcl/bitmap/BitmapFilter.hxx>
  14
  15 class VCL_DLLPUBLIC BitmapMonochromeFilter final : public BitmapFilter
  16 {
  17 public:
  18     /** Convert to 2 color bitmap.
  19
  20         Converts to a 2 color indexed bitmap - note that we don't change to black
  21         and white monochrome, but we pick the closest color to black and white in
  22         the bitmap.
  23
  24         @param cThreshold
  25         Luminance value that determines whether the colour should be black (or
  26         closest color to black) or white (or closest color to white).
  27
  28      */
  29     BitmapMonochromeFilter(sal_uInt8 cThreshold)
  30         : mcThreshold(cThreshold)
  31     {
  32     }
  33
  34     virtual BitmapEx execute(BitmapEx const& rBitmapEx) const override;
  35
  36 private:
  37     sal_uInt8 mcThreshold;
  38 };
  39
  40 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */