1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/2d/ImageScaling.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,76 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef _MOZILLA_GFX_IMAGESCALING_H
1.10 +#define _MOZILLA_GFX_IMAGESCALING_H
1.11 +
1.12 +#include "Types.h"
1.13 +
1.14 +#include <vector>
1.15 +#include "Point.h"
1.16 +
1.17 +namespace mozilla {
1.18 +namespace gfx {
1.19 +
1.20 +class ImageHalfScaler
1.21 +{
1.22 +public:
1.23 + ImageHalfScaler(uint8_t *aData, int32_t aStride, const IntSize &aSize)
1.24 + : mOrigData(aData), mOrigStride(aStride), mOrigSize(aSize)
1.25 + , mDataStorage(nullptr)
1.26 + {
1.27 + }
1.28 +
1.29 + ~ImageHalfScaler()
1.30 + {
1.31 + delete [] mDataStorage;
1.32 + }
1.33 +
1.34 + void ScaleForSize(const IntSize &aSize);
1.35 +
1.36 + uint8_t *GetScaledData() const { return mData; }
1.37 + IntSize GetSize() const { return mSize; }
1.38 + uint32_t GetStride() const { return mStride; }
1.39 +
1.40 +private:
1.41 + void HalfImage2D(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
1.42 + uint8_t *aDest, uint32_t aDestStride);
1.43 + void HalfImageVertical(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
1.44 + uint8_t *aDest, uint32_t aDestStride);
1.45 + void HalfImageHorizontal(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
1.46 + uint8_t *aDest, uint32_t aDestStride);
1.47 +
1.48 + // This is our SSE2 scaling function. Our destination must always be 16-byte
1.49 + // aligned and use a 16-byte aligned stride.
1.50 + void HalfImage2D_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
1.51 + uint8_t *aDest, uint32_t aDestStride);
1.52 + void HalfImageVertical_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
1.53 + uint8_t *aDest, uint32_t aDestStride);
1.54 + void HalfImageHorizontal_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
1.55 + uint8_t *aDest, uint32_t aDestStride);
1.56 +
1.57 + void HalfImage2D_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
1.58 + uint8_t *aDest, uint32_t aDestStride);
1.59 + void HalfImageVertical_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
1.60 + uint8_t *aDest, uint32_t aDestStride);
1.61 + void HalfImageHorizontal_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
1.62 + uint8_t *aDest, uint32_t aDestStride);
1.63 +
1.64 + uint8_t *mOrigData;
1.65 + int32_t mOrigStride;
1.66 + IntSize mOrigSize;
1.67 +
1.68 + uint8_t *mDataStorage;
1.69 + // Guaranteed 16-byte aligned
1.70 + uint8_t *mData;
1.71 + IntSize mSize;
1.72 + // Guaranteed 16-byte aligned
1.73 + uint32_t mStride;
1.74 +};
1.75 +
1.76 +}
1.77 +}
1.78 +
1.79 +#endif
