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78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project.
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* For complete copyright and license terms please see the LICENSE at the root of this distribution.
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#pragma once
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#include "FIR-Windows.h"
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namespace ImageProcessingAtom
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{
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/* ####################################################################################################################
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*/
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template<class DataType>
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inline DataType abs (const DataType& ths) { return (ths < 0 ? -ths : ths); }
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template<class DataType>
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inline void minmax (const DataType& ths, DataType& mn, DataType& mx) { mn = (mn > ths ? ths : mn); mx = (mx < ths ? ths : mx); }
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template<class DataType>
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inline DataType minimum(const DataType& ths, const DataType& tht) { return (ths < tht ? ths : tht); }
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template<class DataType>
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inline DataType maximum(const DataType& ths, const DataType& tht) { return (ths > tht ? ths : tht); }
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/* ####################################################################################################################
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*/
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template<class T>
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class FilterWeights
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{
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public:
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FilterWeights()
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: weights(nullptr)
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{
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}
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~FilterWeights()
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{
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delete[] weights;
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}
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public:
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// window-position
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int first, last;
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// do we encounter positive as well as negative weights
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bool hasNegativeWeights;
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/* weights, summing up to -(1 << 15),
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* means weights are given negative
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* that enables us to use signed short
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* multiplication while occupying 0x8000
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*/
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T* weights;
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};
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/* ####################################################################################################################
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*/
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void calculateFilterRange (unsigned int srcFactor, int& srcFirst, int& srcLast,
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unsigned int dstFactor, int dstFirst, int dstLast,
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double blurFactor, class IWindowFunction<double>* windowFunction);
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template<typename T>
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FilterWeights<T>* calculateFilterWeights(unsigned int srcFactor, int srcFirst, int srcLast,
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unsigned int dstFactor, int dstFirst, int dstLast, signed short int numRepetitions,
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double blurFactor, class IWindowFunction<double>* windowFunction,
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bool peaknorm, bool& plusminus);
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template<>
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FilterWeights<signed short int>* calculateFilterWeights<signed short int>(unsigned int srcFactor, int srcFirst, int srcLast,
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unsigned int dstFactor, int dstFirst, int dstLast, signed short int numRepetitions,
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double blurFactor, class IWindowFunction<double>* windowFunction,
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bool peaknorm, bool& plusminus);
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} //end namespace ImageProcessingAtom
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