ConvolutionFilter.h (1631B)
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 #include "Types.h" 12 13 namespace skia { 14 class SkConvolutionFilter1D; 15 } 16 17 namespace mozilla { 18 namespace gfx { 19 20 class ConvolutionFilter final { 21 public: 22 ConvolutionFilter(); 23 ~ConvolutionFilter(); 24 25 int32_t MaxFilter() const; 26 int32_t NumValues() const; 27 28 bool GetFilterOffsetAndLength(int32_t aRowIndex, int32_t* aResultOffset, 29 int32_t* aResultLength); 30 31 void ConvolveHorizontally(const uint8_t* aSrc, uint8_t* aDst, 32 SurfaceFormat aFormat); 33 void ConvolveVertically(uint8_t* const* aSrc, uint8_t* aDst, 34 int32_t aRowIndex, int32_t aRowSize, 35 SurfaceFormat aFormat); 36 37 enum class ResizeMethod { BOX, LANCZOS3 }; 38 39 bool ComputeResizeFilter(ResizeMethod aResizeMethod, int32_t aSrcSize, 40 int32_t aDstSize); 41 42 static inline size_t PadBytesForSIMD(size_t aBytes) { 43 return (aBytes + 31) & ~31; 44 } 45 46 const skia::SkConvolutionFilter1D& GetSkiaFilter() const { 47 return *mFilter.get(); 48 } 49 50 private: 51 UniquePtr<skia::SkConvolutionFilter1D> mFilter; 52 }; 53 54 } // namespace gfx 55 } // namespace mozilla 56 57 #endif /* MOZILLA_GFX_CONVOLUTION_FILTER_H_ */