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
|
/*=========================================================================
Program: Visualization Toolkit
Module: TestMetaIO.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.
=========================================================================*/
// .NAME Test of WriteToMemory flag for PNG/JPEG Writers
// .SECTION Description
//
#include <vtkSmartPointer.h>
#include <vtkPNGWriter.h>
#include <vtkJPEGWriter.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageCast.h>
#include <vtksys/SystemTools.hxx>
int TestWriteToMemory(int argc, char *argv[])
{
if ( argc <= 1 )
{
cout << "Usage: " << argv[0] << " <output file name>" << endl;
return EXIT_FAILURE;
}
int extent[6] = {0, 99, 0, 99, 0, 0};
vtkSmartPointer<vtkImageCanvasSource2D> imageSource =
vtkSmartPointer<vtkImageCanvasSource2D>::New();
imageSource->SetExtent(extent);
imageSource->SetScalarTypeToUnsignedChar();
imageSource->SetNumberOfScalarComponents(3);
imageSource->SetDrawColor(127, 45, 255);
imageSource->FillBox(0, 99, 0, 99);
imageSource->SetDrawColor(255,255,255);
imageSource->FillBox(40, 70, 20, 50);
imageSource->Update();
vtkSmartPointer<vtkImageCast> castFilter =
vtkSmartPointer<vtkImageCast>::New();
castFilter->SetOutputScalarTypeToUnsignedChar ();
castFilter->SetInputConnection(imageSource->GetOutputPort());
castFilter->Update();
vtkSmartPointer<vtkImageWriter> writer;
std::string filename = argv[1];
std::string fileext = filename.substr(filename.find_last_of(".") + 1);
// Delete any existing files to prevent false failures
if (vtksys::SystemTools::FileExists(filename))
{
vtksys::SystemTools::RemoveFile(filename);
}
if (fileext == "png")
{
vtkSmartPointer<vtkPNGWriter> pngWriter =
vtkSmartPointer<vtkPNGWriter>::New();
pngWriter->WriteToMemoryOn();
writer = pngWriter;
}
else if (fileext == "jpeg" || fileext == "jpg")
{
vtkSmartPointer<vtkJPEGWriter> jpgWriter =
vtkSmartPointer<vtkJPEGWriter>::New();
jpgWriter->WriteToMemoryOn();
writer = jpgWriter;
}
writer->SetFileName(filename.c_str());
writer->SetInputConnection(castFilter->GetOutputPort());
writer->Update();
writer->Write();
// With WriteToMemory true no file should be written
if (!vtksys::SystemTools::FileExists(filename))
{
return EXIT_SUCCESS;
}
else
{
return EXIT_FAILURE;
}
}
|
