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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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.
*
*=========================================================================*/
#ifndef itkGPUFiniteDifferenceFunction_h
#define itkGPUFiniteDifferenceFunction_h
#include "itkFiniteDifferenceFunction.h"
#include "itkLightObject.h"
#include "itkConstNeighborhoodIterator.h"
#include "itkVector.h"
#include "itkGPUDataManager.h"
#include "itkGPUKernelManager.h"
namespace itk
{
/**
* \class GPUFiniteDifferenceFunction
*
* This is a base class of GPU finite difference function.
* Note that unlike most GPU classes, derived class of GPUFiniteDifferenceFunction
* does not have corresponding CPU class as its parent but only has CPU class
* FiniteDifferenceFunction as its base class. Therefore, only members of
* FiniteDifferenceFunction are reused by its derived GPU classes.
*
* \par How to use this class
* GPUFiniteDifferenceFunction must be subclassed to add functionality for
* GPUComputeUpdate.
*
* \ingroup ITKGPUFiniteDifference
**/
template< typename TImageType >
class GPUFiniteDifferenceFunction : public FiniteDifferenceFunction< TImageType >
{
public:
/** Standard class typedefs. */
typedef GPUFiniteDifferenceFunction Self;
typedef FiniteDifferenceFunction< TImageType > Superclass;
typedef Superclass DifferenceFunctionType;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Run-time type information (and related methods) */
itkTypeMacro(GPUFiniteDifferenceFunction, FiniteDifferenceFunction);
/** Extract some parameters from the image type */
typedef typename Superclass::ImageType ImageType;
typedef typename Superclass::PixelType PixelType;
typedef typename Superclass::PixelRealType PixelRealType;
/** Save image dimension. */
itkStaticConstMacro(ImageDimension, unsigned int, ImageType::ImageDimension);
/** Define the TimeStepType to always be double. */
typedef typename Superclass::TimeStepType TimeStepType;
/** The default boundary condition for finite difference
* functions that is used unless overridden in the Evaluate() method. */
typedef typename Superclass::DefaultBoundaryConditionType DefaultBoundaryConditionType;
/** Neighborhood radius type */
typedef typename Superclass::RadiusType RadiusType;
/** Neighborhood type */
typedef typename Superclass::NeighborhoodType NeighborhoodType;
/** A floating point offset from an image grid location. Used for
* interpolation among grid values in a neighborhood. */
typedef typename Superclass::FloatOffsetType FloatOffsetType;
#if !defined( ITK_WRAPPING_PARSER )
/** Empty implementation - this will not be used by GPU filters */
virtual PixelType ComputeUpdate( const NeighborhoodType & itkNotUsed(neighborhood),
void *itkNotUsed(globalData),
const FloatOffsetType & itkNotUsed(offset = FloatOffsetType(0.0)) )
ITK_OVERRIDE
{
PixelType pix = itk::NumericTraits<PixelType>::ZeroValue();
return pix;
}
#endif
/** GPU function to compute update buffer */
virtual void GPUComputeUpdate( const typename TImageType::Pointer output,
typename TImageType::Pointer update,
void *gd) = 0;
/** Allocate GPU buffers for computing metric statitics
* */
virtual void GPUAllocateMetricData(unsigned int itkNotUsed(numPixels)) {}
/** Release GPU buffers for computing metric statitics
* */
virtual void GPUReleaseMetricData() {}
protected:
GPUFiniteDifferenceFunction() {
m_GPUKernelManager = GPUKernelManager::New();
}
~GPUFiniteDifferenceFunction() ITK_OVERRIDE {}
/** GPU kernel manager for GPUFiniteDifferenceFunction class */
typename GPUKernelManager::Pointer m_GPUKernelManager;
/** GPU kernel handle for GPUComputeUpdate() */
int m_ComputeUpdateGPUKernelHandle;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(GPUFiniteDifferenceFunction);
};
} // end namespace itk
#endif
|
