1 #include "gdcmHeader.h"
5 #include "gdcmDataImages.h"
7 int TestReadWriteReadCompare(int argc, char* argv[])
11 std::cerr << "Test::TestReadWriteReadCompare: Usage: " << argv[0]
12 << " (no arguments needed)." << std::endl;
15 std::cout<< "Test::TestReadWriteReadCompare: description " << std::endl;
16 std::cout << " For all images in gdcmData (and not blacklisted in "
17 "Test/CMakeLists.txt)" << std::endl;
18 std::cout << " apply the following multistep test: " << std::endl;
19 std::cout << " step 1: parse the image (as gdcmHeader) and call"
20 << " IsReadable(). " << std::endl;
21 std::cout << " step 2: write the corresponding image in DICOM V3 "
22 << "with explicit" << std::endl
23 << " Value Representation in temporary file "
24 << "TestReadWriteReadCompare.dcm." << std::endl;
25 std::cout << " step 3: read the image written on step2 and call "
26 << " IsReadable(). " << std::endl;
27 std::cout << " step 4: compare (in memory with memcmp) that the two "
28 << "images " << std::endl
29 << " match (as expanded by gdcm)." << std::endl;
32 while( gdcmDataImages[i] != 0 )
34 std::string filename = GDCM_DATA_ROOT;
36 filename += gdcmDataImages[i++];
38 std::cout << " Testing: " << filename << std::endl;
40 //////////////// Step 1 (see above description):
42 gdcmHeader *header = new gdcmHeader( filename );
43 if( !header->IsReadable() )
45 std::cerr << "Test::TestReadWriteReadCompare: Image not gdcm compatible:"
46 << filename << std::endl;
50 std::cout << " step 1 ...";
52 //////////////// Step 2:
54 gdcmFile* file = new gdcmFile( header );
55 int dataSize = file->GetImageDataSize();
56 void* imageData = file->GetImageData(); //EXTREMELY IMPORTANT
58 /// \todo Following line commented out because gdcmFile::SetImageData() is
59 /// brain dead: it sets ImageDataSize to its argument and PixelRead to a.
60 /// Later on, when writing gdcmFile::WriteBase() and because PixelRead == 1
62 /// PixelElement->SetLength( ImageDataSizeRaw );
63 /// where we use ImageDataSizeRAW instead of ImageDataSize !
64 /// But when the original image made the transformation LUT -> RGB,
65 /// ImageDataSizeRaw is the third of ImageDataSize, and there is no
66 /// reason (since we called gdcmFile::SetImageData) to use the Raw image
67 /// size... This "bug" in gdcmFile made that we had to black list
68 /// images 8BitsUncompressedColor.dcm, OT-PAL-8-face.dcm and
69 /// US-PAL-8-10x-echo.dcm...
70 /// In conclusion fix gdcmFile, and then uncomment the following line.
71 /// file->SetImageData(imageData, dataSize);
72 file->WriteDcmExplVR( "TestReadWriteReadCompare.dcm" );
75 //////////////// Step 3:
77 gdcmFile* reread = new gdcmFile( "TestReadWriteReadCompare.dcm" );
78 if( !reread->GetHeader()->IsReadable() )
80 std::cerr << "Test::TestReadWriteReadCompare: Could not reread image "
81 << "written:" << filename << std::endl;
89 int dataSizeWritten = reread->GetImageDataSize();
90 void* imageDataWritten = reread->GetImageData();
92 //////////////// Step 4:
94 if (dataSize != dataSizeWritten)
96 std::cout << std::endl
97 << " Pixel areas lengths differ: "
98 << dataSize << " # " << dataSizeWritten << std::endl;
99 delete (char*)imageData;
100 delete (char*)imageDataWritten;
107 if (int res = memcmp(imageData, imageDataWritten, dataSize) !=0)
110 std::cout << std::endl
111 << " Pixel differ (as expanded in memory)." << std::endl;
112 delete (char*)imageData;
113 delete (char*)imageDataWritten;
119 std::cout << "4...OK." << std::endl ;
121 //////////////// Clean up:
122 delete (char*)imageData;
123 delete (char*)imageDataWritten;