Module: $RCSfile: gdcmFileHelper.cxx,v $
Language: C++
- Date: $Date: 2005/08/19 13:12:15 $
- Version: $Revision: 1.52 $
+ Date: $Date: 2005/08/20 09:04:50 $
+ Version: $Revision: 1.53 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
These lines will be moved to the document-to-be 'User's Guide'
// To read an image, user needs a gdcm::File
-gdcm::File *f1 = new gdcm::File(fileName);
+gdcm::File *f = new gdcm::File(fileName);
+// or (advanced) :
+// user may also decide he doesn't want to load some parts of the header
+gdcm::File *f = new gdcm::File();
+f->SetFileName(fileName);
+ f->SetLoadMode(NO_SEQ); // or
+ f->SetLoadMode(NO_SHADOW); // or
+ f->SetLoadMode(NO_SEQ | NO_SHADOW); // or
+ f->SetLoadMode(NO_SHADOWSEQ);
+f->Load();
+
// user can now check some values
-std::string v = f1->GetEntryValue(groupNb,ElementNb);
+std::string v = f->GetEntryValue(groupNb,ElementNb);
+
// to get the pixels, user needs a gdcm::FileHelper
-gdcm::FileHelper *fh1 = new gdcm::FileHelper(f1);
+gdcm::FileHelper *fh = new gdcm::FileHelper(f);
// user may ask not to convert Palette to RGB
-uint8_t *pixels = fh1->GetImageDataRaw();
-int imageLength = fh1->GetImageDataRawSize();
+uint8_t *pixels = fh->GetImageDataRaw();
+int imageLength = fh->GetImageDataRawSize();
// He can now use the pixels, create a new image, ...
uint8_t *userPixels = ...
To re-write the image, user re-uses the gdcm::FileHelper
-fh1->SetImageData( userPixels, userPixelsLength);
-fh1->SetTypeToRaw(); // Even if it was possible to convert Palette to RGB
+fh->SetImageData( userPixels, userPixelsLength);
+fh->SetTypeToRaw(); // Even if it was possible to convert Palette to RGB
// (WriteMode is set)
-fh1->SetWriteTypeToDcmExpl(); // he wants Explicit Value Representation
+fh->SetWriteTypeToDcmExpl(); // he wants Explicit Value Representation
// Little Endian is the default
// no other value is allowed
(-->SetWriteType(ExplicitVR);)
-->WriteType = ExplicitVR;
-fh1->Write(newFileName); // overwrites the file, if any
+fh->Write(newFileName); // overwrites the file, if any
// or :
-fh1->WriteDcmExplVR(newFileName);
+fh->WriteDcmExplVR(newFileName);
// ----------------------------- WARNING -------------------------
* Opens (in read only and when possible) an existing file and checks
* for DICOM compliance. Returns NULL on failure.
* It will be up to the user to load the pixels into memory
+ * ( GetImageDataSize() + GetImageData() methods)
* \note the in-memory representation of all available tags found in
* the DICOM header is post-poned to first header information access.
* This avoid a double parsing of public part of the header when
* seen as a side effect).
*/
FileHelper::FileHelper( )
-{
+{
FileInternal = new File( );
SelfHeader = true;
Initialize();
* Opens (in read only and when possible) an existing file and checks
* for DICOM compliance. Returns NULL on failure.
* It will be up to the user to load the pixels into memory
+ * ( GetImageDataSize() + GetImageData() methods)
* \note the in-memory representation of all available tags found in
* the DICOM header is post-poned to first header information access.
* This avoid a double parsing of public part of the header when
FileInternal = header;
SelfHeader = false;
Initialize();
+ if ( FileInternal->IsReadable() )
+ {
+ PixelReadConverter->GrabInformationsFromFile( FileInternal );
+ }
}
+#ifndef GDCM_LEGACY_REMOVE
+/**
+ * \brief DEPRECATED : use SetFilename() + SetLoadMode() + Load() methods
+ * Constructor dedicated to deal with the *pixels* area of a ACR/DICOMV3
+ * file (gdcm::File only deals with the ... header)
+ * Opens (in read only and when possible) an existing file and checks
+ * for DICOM compliance. Returns NULL on failure.
+ * It will be up to the user to load the pixels into memory
+ * \note the in-memory representation of all available tags found in
+ * the DICOM header is post-poned to first header information access.
+ * This avoid a double parsing of public part of the header when
+ * one sets an a posteriori shadow dictionary (efficiency can be
+ * seen as a side effect).
+ * @param filename file to be opened for parsing
+ * @deprecated use SetFilename() + Load() methods
+ */
+FileHelper::FileHelper(std::string const &filename )
+{
+ FileInternal = new File( );
+ FileInternal->SetFileName( filename );
+ FileInternal->Load();
+ SelfHeader = true;
+ Initialize();
+ if ( FileInternal->IsReadable() )
+ {
+ PixelReadConverter->GrabInformationsFromFile( FileInternal );
+ }
+}
+#endif
/**
* \brief canonical destructor
*/
bool FileHelper::Load()
{
- return FileInternal->Load();
+ if ( !FileInternal->Load() )
+ return false;
+
+ PixelReadConverter->GrabInformationsFromFile( FileInternal );
+ return true;
}
/**
PixelReadConverter = new PixelReadConvert;
PixelWriteConverter = new PixelWriteConvert;
Archive = new DocEntryArchive( FileInternal );
-
- if ( FileInternal->IsReadable() )
- {
- PixelReadConverter->GrabInformationsFromFile( FileInternal );
- }
}
/**
PixelReadConverter->Print(os);
}
-#ifndef GDCM_LEGACY_REMOVE
-/**
- * \brief DEPRECATED : use SetFilename() + Load() methods
- * Constructor dedicated to deal with the *pixels* area of a ACR/DICOMV3
- * file (gdcm::File only deals with the ... header)
- * Opens (in read only and when possible) an existing file and checks
- * for DICOM compliance. Returns NULL on failure.
- * It will be up to the user to load the pixels into memory
- * \note the in-memory representation of all available tags found in
- * the DICOM header is post-poned to first header information access.
- * This avoid a double parsing of public part of the header when
- * one sets an a posteriori shadow dictionary (efficiency can be
- * seen as a side effect).
- * @param filename file to be opened for parsing
- * @deprecated use SetFilename() + Load() methods
- */
-FileHelper::FileHelper(std::string const &filename )
-{
- FileInternal = new File( );
- FileInternal->SetFileName( filename );
- FileInternal->Load();
- SelfHeader = true;
- Initialize();
-}
-#endif
//-----------------------------------------------------------------------------
} // end namespace gdcm
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