GDCM
2.2.0
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00001 /*========================================================================= 00002 * 00003 * Copyright Insight Software Consortium 00004 * 00005 * Licensed under the Apache License, Version 2.0 (the "License"); 00006 * you may not use this file except in compliance with the License. 00007 * You may obtain a copy of the License at 00008 * 00009 * http://www.apache.org/licenses/LICENSE-2.0.txt 00010 * 00011 * Unless required by applicable law or agreed to in writing, software 00012 * distributed under the License is distributed on an "AS IS" BASIS, 00013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00014 * See the License for the specific language governing permissions and 00015 * limitations under the License. 00016 * 00017 *=========================================================================*/ 00018 00019 #ifndef GDCMSTREAMIMAGEREADER_H 00020 #define GDCMSTREAMIMAGEREADER_H 00021 00022 #include "gdcmPixmapReader.h" 00023 #include "gdcmImage.h" 00024 #include "gdcmReader.h" 00025 #include <iostream> 00026 #include "gdcmDataSet.h" 00027 00028 namespace gdcm 00029 { 00030 00031 class MediaStorage; 00043 class GDCM_EXPORT StreamImageReader 00044 { 00045 00046 public: 00047 StreamImageReader(); 00048 ~StreamImageReader(); 00049 00050 00054 void SetFileName(const char* inFileName); 00055 void SetStream(std::istream& inStream); 00056 00057 std::vector<unsigned int> GetDimensionsValueForResolution( unsigned int ); 00058 00067 void DefinePixelExtent(uint16_t inXMin, uint16_t inXMax, 00068 uint16_t inYMin, uint16_t inYMax, uint16_t inZMin = 0, uint16_t inZMax = 1); 00069 00074 uint32_t DefineProperBufferLength() const; 00075 00083 bool Read(void* inReadBuffer, const std::size_t& inBufferLength); 00084 00090 bool CanReadImage() const; 00091 00092 00096 virtual bool ReadImageInformation(); 00097 00101 File const & GetFile() const; 00102 00103 protected: 00104 00105 //contains a reader for being able to ReadUpToTag 00106 //however, we don't want the user to be able to call Read 00107 //either directly or via a parent class call, so we hide the reader in here. 00108 Reader mReader; 00109 00110 std::streamoff mFileOffset; //the fileoffset for getting header information 00111 std::streamoff mFileOffset1; 00112 DataSet mHeaderInformation; //all the non-pixel information 00113 00114 //for thread safety, these should not be stored here, but should be used 00115 //for every read subregion operation. 00116 uint16_t mXMin, mYMin, mXMax, mYMax, mZMin, mZMax; 00117 00122 //virtual bool ReadImageSubregionRAW(std::ostream& os); 00123 virtual bool ReadImageSubregionRAW(char* inReadBuffer, const std::size_t& inBufferLength); 00124 00127 bool ReadImageSubregionJpegLS(char* inReadBuffer, const std::size_t& inBufferLength); 00128 00129 }; 00130 //see http://stackoverflow.com/questions/1448467/initializing-a-c-stdistringstream-from-an-in-memory-buffer/1449527#1449527 00131 struct OneShotReadBuf : public std::streambuf 00132 { 00133 OneShotReadBuf(void* s, std::size_t n){ 00134 char* cast = (char*)s; 00135 setg(cast, cast, cast+n); 00136 } 00137 }; 00138 00139 } // end namespace gdcm 00140 00141 #endif //GDCMSTREAMIMAGEREADER_H 00142