1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/*=========================================================================
*
* Copyright UMC Utrecht and contributors
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
//
// \author Denis P. Shamonin and Marius Staring. Division of Image Processing,
// Department of Radiology, Leiden, The Netherlands
//
// \note This work was funded by the Netherlands Organisation for
// Scientific Research (NWO NRG-2010.02 and NWO 639.021.124).
//
// OpenCL implementation of itk::ShrinkImageFilter
//------------------------------------------------------------------------------
// Apple OpenCL 1.0 support function
bool is_valid_3d( const uint3 index, const uint3 size )
{
/* NOTE: More than three-level nested conditional statements (e.g.,
if A && B && C..) invalidates command queue during kernel
execution on Apple OpenCL 1.0 (such Macbook Pro with NVIDIA 9600M
GT). Therefore, we flattened conditional statements. */
if ( index.x >= size.x ) { return false; }
if ( index.y >= size.y ) { return false; }
if ( index.z >= size.z ) { return false; }
return true;
}
//------------------------------------------------------------------------------
OUTPIXELTYPE Functor( const INPIXELTYPE in )
{
OUTPIXELTYPE out = (OUTPIXELTYPE)in;
return out;
}
//------------------------------------------------------------------------------
#ifdef DIM_1
__kernel void ShrinkImageFilter( __global const INPIXELTYPE *in,
__global OUTPIXELTYPE *out,
uint in_image_size, uint out_image_size,
uint offset, uint shrinkfactors )
{
uint index = get_global_id( 0 );
if ( index < out_image_size )
{
uint input_index = mad24( index, shrinkfactors, offset );
uint out_gidx = index;
uint in_gidx = input_index;
out[out_gidx] = Functor( in[in_gidx] );
}
}
#endif
//------------------------------------------------------------------------------
#ifdef DIM_2
__kernel void ShrinkImageFilter( __global const INPIXELTYPE *in,
__global OUTPIXELTYPE *out,
uint2 image_size_in, uint2 image_size_out,
uint2 offset, uint2 shrinkfactors )
{
uint2 index_out = (uint2)( get_global_id( 0 ), get_global_id( 1 ) );
if ( index_out.x < image_size_out.x && index_out.y < image_size_out.y )
{
uint2 index_in = mad24( index_out, shrinkfactors, offset );
uint gidx_in = mad24( image_size_in.x, index_in.y, index_in.x );
uint gidx_out = mad24( image_size_out.x, index_out.y, index_out.x );
out[gidx_out] = Functor( in[gidx_in] );
}
}
#endif
//------------------------------------------------------------------------------
#ifdef DIM_3
__kernel void ShrinkImageFilter( __global const INPIXELTYPE *in,
__global OUTPIXELTYPE *out,
uint3 image_size_in, uint3 image_size_out,
uint3 offset, uint3 shrinkfactors )
{
uint3 index_out = (uint3)( get_global_id( 0 ), get_global_id( 1 ), get_global_id( 2 ) );
if ( is_valid_3d( index_out, image_size_out ) )
{
uint3 index_in = mad24( index_out, shrinkfactors, offset );
uint gidx_in = mad24( image_size_in.x, mad24( index_in.z, image_size_in.y, index_in.y ), index_in.x );
uint gidx_out = mad24( image_size_out.x, mad24( index_out.z, image_size_out.y, index_out.y ), index_out.x );
out[gidx_out] = Functor( in[gidx_in] );
}
}
#endif
|
