LibreOffice Module vcl (master) 1
BitmapLightenFilter.cxx
Go to the documentation of this file.
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
12
15
17{
18 const Size aSize(rBitmapEx.GetSizePixel());
19
20 Bitmap aBitmap(rBitmapEx.GetBitmap());
21 Bitmap aDarkBitmap(aSize, vcl::PixelFormat::N24_BPP);
22
23 Bitmap::ScopedReadAccess pRead(aBitmap);
24 BitmapScopedWriteAccess pWrite(aDarkBitmap);
25
26 if (pRead && pWrite)
27 {
28 for (sal_Int32 nY = 0; nY < sal_Int32(aSize.Height()); ++nY)
29 {
30 Scanline pScanline = pWrite->GetScanline(nY);
31 Scanline pScanlineRead = pRead->GetScanline(nY);
32 for (sal_Int32 nX = 0; nX < sal_Int32(aSize.Width()); ++nX)
33 {
34 BitmapColor aBmpColor
35 = pRead->HasPalette()
36 ? pRead->GetPaletteColor(pRead->GetIndexFromData(pScanlineRead, nX))
37 : pRead->GetPixelFromData(pScanlineRead, nX);
38 aBmpColor.Invert();
39 basegfx::BColor aBColor(aBmpColor.getBColor());
40 aBColor = basegfx::utils::rgb2hsl(aBColor);
41
42 double fHue = aBColor.getRed();
43 fHue += 180.0;
44
45 while (fHue > 360.0)
46 {
47 fHue -= 360.0;
48 }
49
50 aBColor.setRed(fHue);
51
52 aBColor = basegfx::utils::hsl2rgb(aBColor);
53 aBmpColor.SetRed((aBColor.getRed() * 255.0) + 0.5);
54 aBmpColor.SetGreen((aBColor.getGreen() * 255.0) + 0.5);
55 aBmpColor.SetBlue((aBColor.getBlue() * 255.0) + 0.5);
56
57 pWrite->SetPixelOnData(pScanline, nX, aBmpColor);
58 }
59 }
60 }
61 pWrite.reset();
62 pRead.reset();
63
64 return BitmapEx(aDarkBitmap, rBitmapEx.GetAlpha());
65}
66
67/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
sal_uInt8 * Scanline
Definition: Scanline.hxx:26
AlphaMask GetAlpha() const
Definition: BitmapEx.cxx:215
Bitmap GetBitmap(Color aTransparentReplaceColor) const
Definition: BitmapEx.cxx:203
const Size & GetSizePixel() const
Definition: bitmapex.hxx:72
bool HasPalette() const
const BitmapColor & GetPaletteColor(sal_uInt16 nColor) const
virtual BitmapEx execute(BitmapEx const &rBitmapEx) const override
BitmapColor GetPixelFromData(const sal_uInt8 *pData, tools::Long nX) const
sal_uInt8 GetIndexFromData(const sal_uInt8 *pData, tools::Long nX) const
Scanline GetScanline(tools::Long nY) const
void SetGreen(sal_uInt8 nGreen)
void SetRed(sal_uInt8 nRed)
basegfx::BColor getBColor() const
void Invert()
void SetBlue(sal_uInt8 nBlue)
constexpr tools::Long Height() const
constexpr tools::Long Width() const
double getBlue() const
double getRed() const
double getGreen() const
void setRed(double fNew)
BColor rgb2hsl(const BColor &rRGBColor)
BColor hsl2rgb(const BColor &rHSLColor)