1 /*=========================================================================
4 Module: $RCSfile: TestReadWriteReadCompare.cxx,v $
6 Date: $Date: 2004/11/16 04:28:20 $
7 Version: $Revision: 1.13 $
9 Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
10 l'Image). All rights reserved. See Doc/License.txt or
11 http://www.creatis.insa-lyon.fr/Public/Gdcm/License.html for details.
13 This software is distributed WITHOUT ANY WARRANTY; without even
14 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 PURPOSE. See the above copyright notices for more information.
17 =========================================================================*/
18 #include "gdcmHeader.h"
22 #include "gdcmDataImages.h"
24 int CompareInternal(std::string const & filename, std::string const & output)
26 std::cout << " Testing: " << filename << std::endl;
28 //////////////// Step 1 (see above description):
30 gdcm::Header *header = new gdcm::Header( filename );
31 if( !header->IsReadable() )
33 std::cerr << "Test::TestReadWriteReadCompare: Image not gdcm compatible:"
34 << filename << std::endl;
38 std::cout << " step 1 ...";
40 //////////////// Step 2:
42 gdcm::File* file = new gdcm::File( header );
43 int dataSize = file->GetImageDataSize();
44 uint8_t* imageData = file->GetImageData(); //EXTREMELY IMPORTANT
45 // Sure, it is : It's up to the user to decide if he wants to
46 // GetImageData or if he wants to GetImageDataRaw
47 // (even if we do it by setting a flag, he will have to decide)
49 /// \todo Following line commented out because gdcmFile::SetImageData() is
50 /// brain dead: it sets ImageDataSize to its argument and PixelRead to a.
51 /// Later on, when writing gdcmFile::WriteBase()
52 /// and because PixelRead == 1 we call
53 /// PixelElement->SetLength( ImageDataSizeRaw );
54 /// where we use ImageDataSizeRAW instead of ImageDataSize !
55 /// But when the original image made the transformation LUT -> RGB,
56 /// ImageDataSizeRaw is the third of ImageDataSize, and there is no
57 /// reason (since we called gdcmFile::SetImageData) to use the Raw image
58 /// size... This "bug" in gdcmFile made that we had to black list
59 /// images 8BitsUncompressedColor.dcm, OT-PAL-8-face.dcm and
60 /// US-PAL-8-10x-echo.dcm...
61 /// In conclusion fix gdcmFile, and then uncomment the following line.
63 // --> I did. ctest doesn't break. But ... is it enought to say it's OK ?
65 file->SetImageData(imageData, dataSize);
67 file->WriteDcmExplVR( output );
70 //////////////// Step 3:
72 gdcm::File* reread = new gdcm::File( output );
73 if( !reread->GetHeader()->IsReadable() )
75 std::cerr << "Test::TestReadWriteReadCompare: Could not reread image "
76 << "written:" << filename << std::endl;
84 int dataSizeWritten = reread->GetImageDataSize();
85 uint8_t* imageDataWritten = reread->GetImageData();
87 //////////////// Step 4:
89 if (dataSize != dataSizeWritten)
91 std::cout << std::endl
92 << " Pixel areas lengths differ: "
93 << dataSize << " # " << dataSizeWritten << std::endl;
100 if (int res = memcmp(imageData, imageDataWritten, dataSize) !=0)
103 std::cout << std::endl
104 << " Pixel differ (as expanded in memory)." << std::endl;
110 std::cout << "4...OK." << std::endl ;
112 //////////////// Clean up:
120 int TestReadWriteReadCompare(int argc, char* argv[])
125 const std::string input = argv[1];
126 const std::string output = argv[2];
127 result += CompareInternal(input, output);
129 else if( argc > 3 || argc == 2 )
131 std::cerr << "Please read the manual" << std::endl;
135 std::cout<< "Test::TestReadWriteReadCompare: description " << std::endl;
136 std::cout << " For all images in gdcmData (and not blacklisted in "
137 "Test/CMakeLists.txt)" << std::endl;
138 std::cout << " apply the following multistep test: " << std::endl;
139 std::cout << " step 1: parse the image (as gdcmHeader) and call"
140 << " IsReadable(). " << std::endl;
141 std::cout << " step 2: write the corresponding image in DICOM V3 "
142 << "with explicit" << std::endl
143 << " Value Representation in temporary file "
144 << "TestReadWriteReadCompare.dcm." << std::endl;
145 std::cout << " step 3: read the image written on step2 and call "
146 << " IsReadable(). " << std::endl;
147 std::cout << " step 4: compare (in memory with memcmp) that the two "
148 << "images " << std::endl
149 << " match (as expanded by gdcm)." << std::endl;
152 while( gdcmDataImages[i] != 0 )
154 std::string filename = GDCM_DATA_ROOT;
156 filename += gdcmDataImages[i++];
157 result += CompareInternal(filename, "TestReadWriteReadCompare.dcm");