1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef MOZILLA_GFX_CONVOLUTION_FILTER_H_ 8 #define MOZILLA_GFX_CONVOLUTION_FILTER_H_ 9 10 #include "mozilla/UniquePtr.h" 11 12 class SkConvolutionFilter1D; 13 14 namespace mozilla { 15 namespace gfx { 16 17 class ConvolutionFilter final { 18 public: 19 ConvolutionFilter(); 20 ~ConvolutionFilter(); 21 22 int32_t MaxFilter() const; 23 int32_t NumValues() const; 24 25 bool GetFilterOffsetAndLength(int32_t aRowIndex, int32_t* aResultOffset, 26 int32_t* aResultLength); 27 28 void ConvolveHorizontally(const uint8_t* aSrc, uint8_t* aDst, bool aHasAlpha); 29 void ConvolveVertically(uint8_t* const* aSrc, uint8_t* aDst, 30 int32_t aRowIndex, int32_t aRowSize, bool aHasAlpha); 31 32 enum class ResizeMethod { BOX, TRIANGLE, LANCZOS3, HAMMING, MITCHELL }; 33 34 bool ComputeResizeFilter(ResizeMethod aResizeMethod, int32_t aSrcSize, 35 int32_t aDstSize); 36 PadBytesForSIMD(size_t aBytes)37 static inline size_t PadBytesForSIMD(size_t aBytes) { 38 return (aBytes + 31) & ~31; 39 } 40 41 private: 42 UniquePtr<SkConvolutionFilter1D> mFilter; 43 }; 44 45 } // namespace gfx 46 } // namespace mozilla 47 48 #endif /* MOZILLA_GFX_CONVOLUTION_FILTER_H_ */ 49