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Diffstat (limited to 'src/runtimerender/Qt3DSRenderImageScaler.h')
| -rw-r--r-- | src/runtimerender/Qt3DSRenderImageScaler.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/runtimerender/Qt3DSRenderImageScaler.h b/src/runtimerender/Qt3DSRenderImageScaler.h new file mode 100644 index 0000000..27b5177 --- /dev/null +++ b/src/runtimerender/Qt3DSRenderImageScaler.h @@ -0,0 +1,121 @@ +/**************************************************************************** +** +** 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_) |