michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef _MOZILLA_GFX_IMAGESCALING_H
michael@0: #define _MOZILLA_GFX_IMAGESCALING_H
michael@0: 
michael@0: #include "Types.h"
michael@0: 
michael@0: #include <vector>
michael@0: #include "Point.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: 
michael@0: class ImageHalfScaler
michael@0: {
michael@0: public:
michael@0:   ImageHalfScaler(uint8_t *aData, int32_t aStride, const IntSize &aSize)
michael@0:     : mOrigData(aData), mOrigStride(aStride), mOrigSize(aSize)
michael@0:     , mDataStorage(nullptr)
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   ~ImageHalfScaler()
michael@0:   {
michael@0:     delete [] mDataStorage;
michael@0:   }
michael@0: 
michael@0:   void ScaleForSize(const IntSize &aSize);
michael@0: 
michael@0:   uint8_t *GetScaledData() const { return mData; }
michael@0:   IntSize GetSize() const { return mSize; }
michael@0:   uint32_t GetStride() const { return mStride; }
michael@0: 
michael@0: private:
michael@0:   void HalfImage2D(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
michael@0:                    uint8_t *aDest, uint32_t aDestStride);
michael@0:   void HalfImageVertical(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
michael@0:                          uint8_t *aDest, uint32_t aDestStride);
michael@0:   void HalfImageHorizontal(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
michael@0:                            uint8_t *aDest, uint32_t aDestStride);
michael@0: 
michael@0:   // This is our SSE2 scaling function. Our destination must always be 16-byte
michael@0:   // aligned and use a 16-byte aligned stride.
michael@0:   void HalfImage2D_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
michael@0:                         uint8_t *aDest, uint32_t aDestStride);
michael@0:   void HalfImageVertical_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
michael@0:                               uint8_t *aDest, uint32_t aDestStride);
michael@0:   void HalfImageHorizontal_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
michael@0:                                 uint8_t *aDest, uint32_t aDestStride);
michael@0: 
michael@0:   void HalfImage2D_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
michael@0:                      uint8_t *aDest, uint32_t aDestStride);
michael@0:   void HalfImageVertical_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
michael@0:                            uint8_t *aDest, uint32_t aDestStride);
michael@0:   void HalfImageHorizontal_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
michael@0:                              uint8_t *aDest, uint32_t aDestStride);
michael@0: 
michael@0:   uint8_t *mOrigData;
michael@0:   int32_t mOrigStride;
michael@0:   IntSize mOrigSize;
michael@0: 
michael@0:   uint8_t *mDataStorage;
michael@0:   // Guaranteed 16-byte aligned
michael@0:   uint8_t *mData;
michael@0:   IntSize mSize;
michael@0:   // Guaranteed 16-byte aligned
michael@0:   uint32_t mStride;
michael@0: };
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif