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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
#ifndef MOZILLA_GFX_CONVOLUTION_FILTER_H_
#define MOZILLA_GFX_CONVOLUTION_FILTER_H_
#include "mozilla/UniquePtr.h"
namespace skia {
class SkConvolutionFilter1D;
}
namespace mozilla {
namespace gfx {
class ConvolutionFilter final {
public:
ConvolutionFilter();
~ConvolutionFilter();
int32_t MaxFilter() const;
int32_t NumValues() const;
bool GetFilterOffsetAndLength(int32_t aRowIndex, int32_t* aResultOffset,
int32_t* aResultLength);
void ConvolveHorizontally(const uint8_t* aSrc, uint8_t* aDst, bool aHasAlpha);
void ConvolveVertically(uint8_t* const* aSrc, uint8_t* aDst,
int32_t aRowIndex, int32_t aRowSize, bool aHasAlpha);
enum class ResizeMethod { BOX, LANCZOS3 };
bool ComputeResizeFilter(ResizeMethod aResizeMethod, int32_t aSrcSize,
int32_t aDstSize);
static inline size_t PadBytesForSIMD(size_t aBytes) {
return (aBytes + 31) & ~31;
}
const skia::SkConvolutionFilter1D& GetSkiaFilter() const {
return *mFilter.get();
}
private:
UniquePtr<skia::SkConvolutionFilter1D> mFilter;
};
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_CONVOLUTION_FILTER_H_ */