6a7a0ac6aa
This reverts commit 59887868da.
Change-Id: I0f3f6a7680c78103a559a0f881badc8211b97ace
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/90544
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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*/
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#ifndef INCLUDED_VCL_BITMAPGAUSSIANSEPARABLEBLURFILTER_HXX
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#define INCLUDED_VCL_BITMAPGAUSSIANSEPARABLEBLURFILTER_HXX
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#include <vcl/BitmapFilter.hxx>
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#include <vector>
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class BitmapEx;
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class BitmapGaussianSeparableBlurFilter final : public BitmapFilter
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{
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public:
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BitmapGaussianSeparableBlurFilter(double fRadius)
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: mfRadius(fRadius)
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{
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}
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/** Separable Gaussian Blur filter and accepts a blur radius
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as a parameter so the user can change the strength of the blur.
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Radius of 1.0 is 3 * standard deviation of gauss function.
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Separable Blur implementation uses 2x separable 1D convolution
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to process the image.
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*/
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virtual BitmapEx execute(BitmapEx const& rBitmapEx) const override;
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private:
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double mfRadius;
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static bool convolutionPass(const Bitmap& rBitmap, Bitmap& aNewBitmap,
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BitmapReadAccess const* pReadAcc, int aNumberOfContributions,
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const double* pWeights, int const* pPixels, const int* pCount);
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static std::vector<double> makeBlurKernel(const double radius, int& rows);
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static void blurContributions(const int aSize, const int aNumberOfContributions,
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const std::vector<double>& rBlurVector,
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std::vector<double>& rWeights, std::vector<int>& rPixels,
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std::vector<int>& rCounts);
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};
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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