LibreOffice Module vcl (master)  1
BitmapShadowFilter.cxx
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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 #include <vcl/bitmapex.hxx>
12 #include <vcl/BitmapColor.hxx>
14 
16 
18 {
19  BitmapEx aBitmapEx(rBitmapEx);
20  BitmapScopedWriteAccess pWriteAccess(const_cast<Bitmap&>(aBitmapEx.GetBitmap()));
21 
22  if (!pWriteAccess)
23  return rBitmapEx;
24 
25  for (tools::Long y(0); y < pWriteAccess->Height(); y++)
26  {
27  Scanline pScanline = pWriteAccess->GetScanline(y);
28 
29  for (tools::Long x(0); x < pWriteAccess->Width(); x++)
30  {
31  const BitmapColor aColor = pWriteAccess->GetColor(y, x);
32  sal_uInt16 nLuminance(static_cast<sal_uInt16>(aColor.GetLuminance()) + 1);
33  const BitmapColor aDestColor(
34  static_cast<sal_uInt8>(
35  (nLuminance * static_cast<sal_uInt16>(maShadowColor.GetRed())) >> 8),
36  static_cast<sal_uInt8>(
37  (nLuminance * static_cast<sal_uInt16>(maShadowColor.GetGreen())) >> 8),
38  static_cast<sal_uInt8>(
39  (nLuminance * static_cast<sal_uInt16>(maShadowColor.GetBlue())) >> 8));
40 
41  pWriteAccess->SetPixelOnData(pScanline, x, aDestColor);
42  }
43  }
44 
45  return aBitmapEx;
46 }
47 
48 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
sal_uInt8 GetRed() const
long Long
sal_uInt8 GetLuminance() const
This template handles BitmapAccess the RAII way.
float x
sal_uInt8 GetBlue() const
float y
sal_uInt8 * Scanline
Definition: Scanline.hxx:26
Bitmap GetBitmap(Color aTransparentReplaceColor) const
Definition: BitmapEx.cxx:229
sal_uInt8 GetGreen() const
virtual BitmapEx execute(BitmapEx const &rBitmapEx) const override