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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 05:54:39 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 05:54:39 +0000 |
commit | 267c6f2ac71f92999e969232431ba04678e7437e (patch) | |
tree | 358c9467650e1d0a1d7227a21dac2e3d08b622b2 /vcl/source/bitmap/BitmapLightenFilter.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-267c6f2ac71f92999e969232431ba04678e7437e.tar.xz libreoffice-267c6f2ac71f92999e969232431ba04678e7437e.zip |
Adding upstream version 4:24.2.0.upstream/4%24.2.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vcl/source/bitmap/BitmapLightenFilter.cxx')
-rw-r--r-- | vcl/source/bitmap/BitmapLightenFilter.cxx | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/vcl/source/bitmap/BitmapLightenFilter.cxx b/vcl/source/bitmap/BitmapLightenFilter.cxx new file mode 100644 index 0000000000..a5c4f71e63 --- /dev/null +++ b/vcl/source/bitmap/BitmapLightenFilter.cxx @@ -0,0 +1,67 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + */ + +#include <basegfx/color/bcolortools.hxx> + +#include <vcl/BitmapWriteAccess.hxx> +#include <bitmap/BitmapLightenFilter.hxx> + +BitmapEx BitmapLightenFilter::execute(BitmapEx const& rBitmapEx) const +{ + const Size aSize(rBitmapEx.GetSizePixel()); + + Bitmap aBitmap(rBitmapEx.GetBitmap()); + Bitmap aDarkBitmap(aSize, vcl::PixelFormat::N24_BPP); + + BitmapScopedReadAccess pRead(aBitmap); + BitmapScopedWriteAccess pWrite(aDarkBitmap); + + if (pRead && pWrite) + { + for (sal_Int32 nY = 0; nY < sal_Int32(aSize.Height()); ++nY) + { + Scanline pScanline = pWrite->GetScanline(nY); + Scanline pScanlineRead = pRead->GetScanline(nY); + for (sal_Int32 nX = 0; nX < sal_Int32(aSize.Width()); ++nX) + { + BitmapColor aBmpColor + = pRead->HasPalette() + ? pRead->GetPaletteColor(pRead->GetIndexFromData(pScanlineRead, nX)) + : pRead->GetPixelFromData(pScanlineRead, nX); + aBmpColor.Invert(); + basegfx::BColor aBColor(aBmpColor.getBColor()); + aBColor = basegfx::utils::rgb2hsl(aBColor); + + double fHue = aBColor.getRed(); + fHue += 180.0; + + while (fHue > 360.0) + { + fHue -= 360.0; + } + + aBColor.setRed(fHue); + + aBColor = basegfx::utils::hsl2rgb(aBColor); + aBmpColor.SetRed((aBColor.getRed() * 255.0) + 0.5); + aBmpColor.SetGreen((aBColor.getGreen() * 255.0) + 0.5); + aBmpColor.SetBlue((aBColor.getBlue() * 255.0) + 0.5); + + pWrite->SetPixelOnData(pScanline, nX, aBmpColor); + } + } + } + pWrite.reset(); + pRead.reset(); + + return BitmapEx(aDarkBitmap, rBitmapEx.GetAlphaMask()); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |