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/****************************************************************************
**
** Copyright (C) 1999-2001 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//==============================================================================
// Prefix
//==============================================================================
#ifndef __IMAGESCALER_H_
#define __IMAGESCALER_H_
#include "Qt3DSRender.h"
namespace qt3ds {
namespace render {
//==============================================================================
// Class
//==============================================================================
//==============================================================================
/**
* @class CImageScaler
*/
//==============================================================================
class CImageScaler
{
NVAllocatorCallback &m_Allocator;
public:
//==============================================================================
// Methods
//==============================================================================
enum EScaleMethod {
SCALEMETHOD_CROP = -1, // Debug only, not a scaler
SCALEMETHOD_POINTSAMPLE = 0,
SCALEMETHOD_BILINEAR = 1,
};
//==============================================================================
// Methods
//==============================================================================
// Access
public:
CImageScaler(NVAllocatorCallback &inAlloc);
void Scale(EScaleMethod inScaleMethod, unsigned char *inOldBuffer, unsigned long inOldWidth,
unsigned long inOldHeight, unsigned char *&outNewBuffer,
unsigned long inNewWidth, unsigned long inNewHeight, unsigned long inChannels);
void FastScale(EScaleMethod inScaleMethod, unsigned char *inOldBuffer,
unsigned long inOldWidth, unsigned long inOldHeight,
unsigned char *&outNewBuffer, unsigned long inNewWidth,
unsigned long inNewHeight, unsigned long inChannels);
void Crop(unsigned char *inOldBuffer, unsigned long inOldWidth, unsigned long inOldHeight,
unsigned char *&outNewBuffer, unsigned long inNewWidth, unsigned long inNewHeight,
unsigned long inPlanes);
void Bilinear(unsigned char *inOldBuffer, unsigned long inOldWidth,
unsigned long inOldHeight, unsigned char *&outNewBuffer,
unsigned long inNewWidth, unsigned long inNewHeight, unsigned long inPlanes);
void FastPointSample(unsigned char *inOldBuffer, unsigned long inOldWidth,
unsigned long inOldHeight, unsigned char *&outNewBuffer,
unsigned long inNewWidth, unsigned long inNewHeight,
unsigned long inPlanes);
unsigned char *AllocateBuffer(long inWidth, long inHeight);
void ReleaseBuffer(unsigned char *&ioBuffer);
void Resize(unsigned char *inOldBuffer, unsigned long inOldWidth, unsigned long inOldHeight,
unsigned char *&outNewBuffer, unsigned long inNewWidth,
unsigned long inNewHeight, unsigned long inPlanes);
// variable numbers of planes, i.e. greyscale, rb, rbg, and rgba or argb
// Bilinear algorithms, good for quality
void ExpandRowsAndColumns(unsigned char *inBuffer, unsigned long inWidth,
unsigned long inHeight, unsigned char *outBuffer,
unsigned long inDstWidth, unsigned long inDstHeight,
unsigned long inPlanes);
// The method implemented above, but with some optimizations
// specifically, fixed the number of planes at 4
// eliminated the new/delete allocations
void FastExpandRowsAndColumns(unsigned char *inBuffer, unsigned long inWidth,
unsigned long inHeight, unsigned char *outBuffer,
unsigned long inDstWidth, unsigned long inDstHeight);
void ReduceCols(unsigned char *inSrcBuffer, long inSrcWidth, long inSrcHeight,
unsigned char *&outDstBuffer, long inDstWidth);
void ReduceRows(unsigned char *inSrcBuffer, long inSrcWidth, long inSrcHeight,
unsigned char *&outDstBuffer, long inDstHeight);
};
}
}
#endif // !defined(__IMAGESCALER_H_)
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