gecko/gfx/2d/ImageScaling.h

109 lines
4.1 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Corporation code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Bas Schouten <bschouten@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef _MOZILLA_GFX_IMAGESCALING_H
#define _MOZILLA_GFX_IMAGESCALING_H
#include "Types.h"
#include <vector>
#include "Point.h"
namespace mozilla {
namespace gfx {
class ImageHalfScaler
{
public:
ImageHalfScaler(uint8_t *aData, int32_t aStride, const IntSize &aSize)
: mOrigData(aData), mOrigStride(aStride), mOrigSize(aSize)
, mDataStorage(NULL)
{
}
~ImageHalfScaler()
{
delete [] mDataStorage;
}
void ScaleForSize(const IntSize &aSize);
uint8_t *GetScaledData() const { return mData; }
IntSize GetSize() const { return mSize; }
uint32_t GetStride() const { return mStride; }
private:
void HalfImage2D(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageVertical(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageHorizontal(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
// This is our SSE2 scaling function. Our destination must always be 16-byte
// aligned and use a 16-byte aligned stride.
void HalfImage2D_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageVertical_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageHorizontal_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImage2D_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageVertical_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageHorizontal_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
uint8_t *mOrigData;
int32_t mOrigStride;
IntSize mOrigSize;
uint8_t *mDataStorage;
// Guaranteed 16-byte aligned
uint8_t *mData;
IntSize mSize;
// Guaranteed 16-byte aligned
uint32_t mStride;
};
}
}
#endif