// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2010-2012, Institute Of Software Chinese Academy Of Science, all rights reserved.
// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// @Authors
// Niko Li, newlife20080214@gmail.com
// Zero Lin zero.lin@amd.com
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors as is and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//
#ifdef DOUBLE_SUPPORT
#ifdef cl_amd_fp64
#pragma OPENCL EXTENSION cl_amd_fp64:enable
#elif defined (cl_khr_fp64)
#pragma OPENCL EXTENSION cl_khr_fp64:enable
#endif
#endif
#if cn != 3
#define loadpix(addr) *(__global const T*)(addr)
#define storepix(val, addr) *(__global T*)(addr) = val
#define TSIZE ((int)sizeof(T))
#define convertScalar(a) (a)
#else
#define loadpix(addr) vload3(0, (__global const T1*)(addr))
#define storepix(val, addr) vstore3(val, 0, (__global T1*)(addr))
#define TSIZE ((int)sizeof(T1)*3)
#define convertScalar(a) (T)(a.x, a.y, a.z)
#endif
#ifdef BORDER_CONSTANT
#define EXTRAPOLATE(x, cols) \
;
#elif defined BORDER_REPLICATE
#define EXTRAPOLATE(x, cols) \
x = clamp(x, 0, cols - 1);
#elif defined BORDER_WRAP
#define EXTRAPOLATE(x, cols) \
{ \
if (x < 0) \
x -= ((x - cols + 1) / cols) * cols; \
if (x >= cols) \
x %= cols; \
}
#elif defined(BORDER_REFLECT) || defined(BORDER_REFLECT_101)
#ifdef BORDER_REFLECT
#define DELTA int delta = 0
#else
#define DELTA int delta = 1
#endif
#define EXTRAPOLATE(x, cols) \
{ \
DELTA; \
if (cols == 1) \
x = 0; \
else \
do \
{ \
if( x < 0 ) \
x = -x - 1 + delta; \
else \
x = cols - 1 - (x - cols) - delta; \
} \
while (x >= cols || x < 0); \
}
#else
#error "No extrapolation method"
#endif
#define NEED_EXTRAPOLATION(x, cols) (x >= cols || x < 0)
__kernel void copyMakeBorder(__global const uchar * srcptr, int src_step, int src_offset, int src_rows, int src_cols,
__global uchar * dstptr, int dst_step, int dst_offset, int dst_rows, int dst_cols,
int top, int left, ST nVal)
{
int x = get_global_id(0);
int y0 = get_global_id(1) * rowsPerWI;
#ifdef BORDER_CONSTANT
T scalar = convertScalar(nVal);
#endif
if (x < dst_cols)
{
int src_x = x - left, src_y;
int dst_index = mad24(y0, dst_step, mad24(x, (int)TSIZE, dst_offset));
if (NEED_EXTRAPOLATION(src_x, src_cols))
{
#ifdef BORDER_CONSTANT
for (int y = y0, y1 = min(y0 + rowsPerWI, dst_rows); y < y1; ++y, dst_index += dst_step)
storepix(scalar, dstptr + dst_index);
return;
#endif
EXTRAPOLATE(src_x, src_cols)
}
src_x = mad24(src_x, TSIZE, src_offset);
for (int y = y0, y1 = min(y0 + rowsPerWI, dst_rows); y < y1; ++y, dst_index += dst_step)
{
src_y = y - top;
if (NEED_EXTRAPOLATION(src_y, src_rows))
{
EXTRAPOLATE(src_y, src_rows)
#ifdef BORDER_CONSTANT
storepix(scalar, dstptr + dst_index);
continue;
#endif
}
int src_index = mad24(src_y, src_step, src_x);
storepix(loadpix(srcptr + src_index), dstptr + dst_index);
}
}
}