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77 lines
2.6 KiB
C++
77 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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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#ifndef _MOZILLA_GFX_IMAGESCALING_H
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#define _MOZILLA_GFX_IMAGESCALING_H
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#include "Types.h"
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#include <vector>
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#include "Point.h"
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namespace mozilla {
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namespace gfx {
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class ImageHalfScaler
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{
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public:
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ImageHalfScaler(uint8_t *aData, int32_t aStride, const IntSize &aSize)
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: mOrigData(aData), mOrigStride(aStride), mOrigSize(aSize)
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, mDataStorage(nullptr)
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{
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}
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~ImageHalfScaler()
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{
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delete [] mDataStorage;
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}
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void ScaleForSize(const IntSize &aSize);
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uint8_t *GetScaledData() const { return mData; }
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IntSize GetSize() const { return mSize; }
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uint32_t GetStride() const { return mStride; }
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private:
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void HalfImage2D(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
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uint8_t *aDest, uint32_t aDestStride);
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void HalfImageVertical(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
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uint8_t *aDest, uint32_t aDestStride);
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void HalfImageHorizontal(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
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uint8_t *aDest, uint32_t aDestStride);
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// This is our SSE2 scaling function. Our destination must always be 16-byte
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// aligned and use a 16-byte aligned stride.
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void HalfImage2D_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
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uint8_t *aDest, uint32_t aDestStride);
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void HalfImageVertical_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
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uint8_t *aDest, uint32_t aDestStride);
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void HalfImageHorizontal_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
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uint8_t *aDest, uint32_t aDestStride);
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void HalfImage2D_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
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uint8_t *aDest, uint32_t aDestStride);
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void HalfImageVertical_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
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uint8_t *aDest, uint32_t aDestStride);
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void HalfImageHorizontal_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
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uint8_t *aDest, uint32_t aDestStride);
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uint8_t *mOrigData;
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int32_t mOrigStride;
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IntSize mOrigSize;
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uint8_t *mDataStorage;
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// Guaranteed 16-byte aligned
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uint8_t *mData;
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IntSize mSize;
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// Guaranteed 16-byte aligned
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uint32_t mStride;
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};
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}
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}
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#endif
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