forked from Kitware/VTK
-
Notifications
You must be signed in to change notification settings - Fork 0
/
vtkImageCast.cxx
170 lines (147 loc) · 4.88 KB
/
vtkImageCast.cxx
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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageCast.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkImageCast.h"
#include "vtkImageData.h"
#include "vtkImageProgressIterator.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
vtkStandardNewMacro(vtkImageCast);
//----------------------------------------------------------------------------
vtkImageCast::vtkImageCast()
{
this->SetNumberOfInputPorts(1);
this->SetNumberOfOutputPorts(1);
this->OutputScalarType = VTK_FLOAT;
this->ClampOverflow = 0;
}
//----------------------------------------------------------------------------
// Just change the Image type.
int vtkImageCast::RequestInformation (
vtkInformation * vtkNotUsed( request ),
vtkInformationVector** vtkNotUsed( inputVector ),
vtkInformationVector * outputVector)
{
// get the info objects
vtkInformation* outInfo = outputVector->GetInformationObject(0);
vtkDataObject::SetPointDataActiveScalarInfo(outInfo, this->OutputScalarType, -1);
return 1;
}
//----------------------------------------------------------------------------
// This templated function executes the filter for any type of data.
template <class IT, class OT>
void vtkImageCastExecute(vtkImageCast *self,
vtkImageData *inData,
vtkImageData *outData,
int outExt[6], int id, IT *, OT *)
{
vtkImageIterator<IT> inIt(inData, outExt);
vtkImageProgressIterator<OT> outIt(outData, outExt, self, id);
double typeMin, typeMax, val;
int clamp;
// for preventing overflow
typeMin = outData->GetScalarTypeMin();
typeMax = outData->GetScalarTypeMax();
clamp = self->GetClampOverflow();
// Loop through output pixels
while (!outIt.IsAtEnd())
{
IT* inSI = inIt.BeginSpan();
OT* outSI = outIt.BeginSpan();
OT* outSIEnd = outIt.EndSpan();
if (clamp)
{
while (outSI != outSIEnd)
{
// Pixel operation
val = static_cast<double>(*inSI);
if (val > typeMax)
{
val = typeMax;
}
if (val < typeMin)
{
val = typeMin;
}
*outSI = static_cast<OT>(val);
++outSI;
++inSI;
}
}
else
{
while (outSI != outSIEnd)
{
// now process the components
// NB: without clamping, this cast may result in undefined behavior!
*outSI = static_cast<OT>(*inSI);
++outSI;
++inSI;
}
}
inIt.NextSpan();
outIt.NextSpan();
}
}
//----------------------------------------------------------------------------
template <class T>
void vtkImageCastExecute(vtkImageCast *self,
vtkImageData *inData,
vtkImageData *outData, int outExt[6], int id,
T *)
{
switch (outData->GetScalarType())
{
vtkTemplateMacro(vtkImageCastExecute(self,
inData, outData, outExt, id,
static_cast<T *>(0),
static_cast<VTK_TT *>(0)));
default:
vtkGenericWarningMacro("Execute: Unknown output ScalarType");
return;
}
}
//----------------------------------------------------------------------------
// This method is passed a input and output region, and executes the filter
// algorithm to fill the output from the input.
// It just executes a switch statement to call the correct function for
// the regions data types.
void vtkImageCast::ThreadedExecute (vtkImageData *inData,
vtkImageData *outData,
int outExt[6], int id)
{
switch (inData->GetScalarType())
{
vtkTemplateMacro(
vtkImageCastExecute(this, inData,
outData, outExt, id,
static_cast<VTK_TT *>(0)));
default:
vtkErrorMacro(<< "Execute: Unknown input ScalarType");
return;
}
}
//----------------------------------------------------------------------------
void vtkImageCast::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "OutputScalarType: " << this->OutputScalarType << "\n";
os << indent << "ClampOverflow: ";
if (this->ClampOverflow)
{
os << "On\n";
}
else
{
os << "Off\n";
}
}