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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// 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
// Zhang Ying, zhangying913@gmail.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 oclMaterials 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.
//
//M*/
#if defined (DOUBLE_SUPPORT)
#pragma OPENCL EXTENSION cl_khr_fp64:enable
#endif
// threshold type:
// enum { THRESH_BINARY=0, THRESH_BINARY_INV=1, THRESH_TRUNC=2, THRESH_TOZERO=3,
// THRESH_TOZERO_INV=4, THRESH_MASK=7, THRESH_OTSU=8 };
__kernel void threshold_C1_D0(__global const uchar * restrict src, __global uchar *dst,
int src_offset, int src_step,
int dst_offset, int dst_rows, int dst_cols, int dst_step,
uchar thresh, uchar max_val, int thresh_type
)
{
int gx = get_global_id(0);
const int gy = get_global_id(1);
int offset = (dst_offset & 15);
src_offset -= offset;
int dstart = (gx << 4) - offset;
if(dstart < dst_cols && gy < dst_rows)
{
uchar16 sdata = vload16(gx, src+src_offset+gy*src_step);
uchar16 ddata;
uchar16 zero = 0;
switch (thresh_type)
{
case 0:
ddata = ((sdata > thresh) ) ? (uchar16)(max_val) : (uchar16)(0);
break;
case 1:
ddata = ((sdata > thresh)) ? zero : (uchar16)(max_val);
break;
case 2:
ddata = ((sdata > thresh)) ? (uchar16)(thresh) : sdata;
break;
case 3:
ddata = ((sdata > thresh)) ? sdata : zero;
break;
case 4:
ddata = ((sdata > thresh)) ? zero : sdata;
break;
default:
ddata = sdata;
}
int16 dpos = (int16)(dstart, dstart+1, dstart+2, dstart+3, dstart+4, dstart+5, dstart+6, dstart+7, dstart+8,
dstart+9, dstart+10, dstart+11, dstart+12, dstart+13, dstart+14, dstart+15);
uchar16 dVal = *(__global uchar16*)(dst+dst_offset+gy*dst_step+dstart);
int16 con = dpos >= 0 && dpos < dst_cols;
ddata = convert_uchar16(con != 0) ? ddata : dVal;
if(dstart < dst_cols)
{
*(__global uchar16*)(dst+dst_offset+gy*dst_step+dstart) = ddata;
}
}
}
__kernel void threshold_C1_D5(__global const float * restrict src, __global float *dst,
int src_offset, int src_step,
int dst_offset, int dst_rows, int dst_cols, int dst_step,
float thresh, float max_val, int thresh_type
)
{
const int gx = get_global_id(0);
const int gy = get_global_id(1);
int offset = (dst_offset & 3);
src_offset -= offset;
int dstart = (gx << 2) - offset;
if(dstart < dst_cols && gy < dst_rows)
{
float4 sdata = vload4(gx, src+src_offset+gy*src_step);
float4 ddata;
float4 zero = 0;
switch (thresh_type)
{
case 0:
ddata = sdata > thresh ? (float4)(max_val) : (float4)(0.f);
break;
case 1:
ddata = sdata > thresh ? zero : (float4)max_val;
break;
case 2:
ddata = sdata > thresh ? (float4)thresh : sdata;
break;
case 3:
ddata = sdata > thresh ? sdata : (float4)(0.f);
break;
case 4:
ddata = sdata > thresh ? (float4)(0.f) : sdata;
break;
default:
ddata = sdata;
}
int4 dpos = (int4)(dstart, dstart+1, dstart+2, dstart+3);
float4 dVal = *(__global float4*)(dst+dst_offset+gy*dst_step+dstart);
int4 con = dpos >= 0 && dpos < dst_cols;
ddata = convert_float4(con) != (float4)(0) ? ddata : dVal;
if(dstart < dst_cols)
{
*(__global float4*)(dst+dst_offset+gy*dst_step+dstart) = ddata;
}
}
}