Simple overlay load.

src/src/IO/DICOM/DICOMPixelDataHelper.cpp

@@ -154,6 +154,17 @@ void DICOMPixelDataHelper::GetRGBPixelData(const char *path, void *data, unsigne
     delete fileFormat;
 }
 
+int DICOMPixelDataHelper::GetOverLayCount(const char *path) {
+    int ret = 0;
+    DcmFileFormat fileFormat;
+    if (fileFormat.loadFile(path).good()) {
+        DcmDataset * dset = fileFormat.getDataset();
+        DicomImage dcmImage(&fileFormat, dset->getOriginalXfer(), CIF_MayDetachPixelData);
+        ret = dcmImage.getOverlayCount();
+    }
+    return ret;
+}
+
 void DICOMPixelDataHelper::GetOverlayData(const char *path, void *data,
         unsigned int& width, unsigned int& height, unsigned int plane) {
     DcmFileFormat *fileFormat = new DcmFileFormat();//读取文件获取传输语法
@@ -163,9 +174,27 @@ void DICOMPixelDataHelper::GetOverlayData(const char *path, void *data,
         if(dcmImage.getOverlayCount()>plane){
             const void * overlay = dcmImage.getFullOverlayData(plane,width, height);
             int dataLength = width*height;
-            data = new unsigned char[dataLength];
+            if (plane == 0){
                 memcpy(data, overlay, dataLength);
             }
+            else{
+                int count32 = dataLength / 4;
+                int tailCount8 = dataLength % 4;
+                //OR operation header and content
+                Uint32 * mergeDst = (Uint32*)data;
+                Uint32 * mergeSrc = (Uint32*)overlay;
+                for (int i = 0; i < count32; ++i) {
+                    mergeDst[i] = mergeDst[i] | mergeSrc[i];
+                }
+                //OR operation tail
+                Uint8 * mergeDst8 = (Uint8*)data;
+                Uint8 * mergeSrc8 = (Uint8*)overlay;
+                for (int i = 1; i <= tailCount8; ++i) {
+                    mergeDst8[dataLength - i] = mergeDst8[dataLength - i] | mergeSrc8[dataLength - i];
+                }
+            }
+            dcmImage.deleteOverlayData();
+        }
         else{
             width=-1;
             height=-1;

src/src/IO/DICOM/DICOMPixelDataHelper.h

@@ -42,6 +42,7 @@ public:
      */
     static void GetRGBPixelData(const char * path, void* data, unsigned long& length);
 
+    static int GetOverLayCount(const char *path);
 
     static void GetOverlayData(const char * path, void* data,
                                unsigned int& width, unsigned int& height,unsigned int plane = 0);

src/src/IO/DICOM/ExtendMedicalImageProperties.h

@@ -54,6 +54,9 @@ public:
     vtkGetMacro(PixelRepresentation, unsigned short)
     vtkSetMacro(PixelRepresentation, unsigned short)
 
+    vtkGetMacro(HasOverlay, bool)
+    vtkSetMacro(HasOverlay, bool)
+
     vtkSetVector3Macro(Spacing,double);
     vtkGetVector3Macro(Spacing,double);
 
@@ -131,6 +134,7 @@ protected:
     unsigned short SamplePerPixel;
     unsigned short BitsAllocated;
     unsigned short PixelRepresentation;
+    bool HasOverlay = false;
     std::vector<std::string> FileNames;
     std::string uniqueID;
     vtkNew<vtkMatrix4x4> OrientationMatrix;

src/src/IO/DICOM/vtkDICOMImageReader2.cpp

@@ -99,6 +99,24 @@ void vtkDICOMImageReader2::ExecuteDataWithInformation(vtkDataObject *output,
 
     for (int i = 0; i < properties->GetFileNames().size(); ++i) {
         const std::string &path = properties->GetFileNames()[i];
+        int overlayCount = DICOMPixelDataHelper::GetOverLayCount(path.c_str());
+        if (overlayCount > 0){
+            if (!OverLayData){
+                HasOverlay = true;
+                OverLayData = vtkImageData::New();
+                OverLayData->SetExtent(data->GetExtent());
+                OverLayData->SetSpacing(data->GetSpacing());
+                OverLayData->SetOrigin(data->GetOrigin());
+                OverLayData->AllocateScalars(VTK_UNSIGNED_CHAR,1);
+            }
+            unsigned int width = 0;
+            unsigned int height = 0;
+            void* overlayBuffer = OverLayData->GetScalarPointer(0, 0, i);
+            for (int j = 0; j < overlayCount; ++j) {
+                DICOMPixelDataHelper::GetOverlayData(path.c_str(), overlayBuffer, width, height);
+            }
+
+        }
 
         unsigned long imageDataLength;
 
@@ -115,6 +133,7 @@ void vtkDICOMImageReader2::ExecuteDataWithInformation(vtkDataObject *output,
             DICOMPixelDataHelper::GetPixelData(path.c_str(), buffer, imageDataLength);
 
         }
+
         buffer = ((char *) buffer) + imageDataLength;
     }
 
@@ -143,3 +162,7 @@ void vtkDICOMImageReader2::SetFileNames(const std::vector<std::string>& files) {
         this->DICOMFileNames->push_back(fileString);
     }
 }
+
+vtkImageData *vtkDICOMImageReader2::GetOutputOverLayData() {
+    return OverLayData;
+}

src/src/IO/DICOM/vtkDICOMImageReader2.h

@@ -34,6 +34,12 @@ public:
         return DICOMFileNames;
     }
     double* GetPixelSpacing();
+
+    vtkGetMacro(HasOverlay, bool);
+    vtkSetMacro(HasOverlay, bool);
+
+    vtkImageData* GetOutputOverLayData();
+
 protected:
 
     void SetupOutputInformation(int num_slices);
@@ -53,7 +59,9 @@ protected:
 private:
     vtkDICOMImageReader2(const vtkDICOMImageReader2&) = delete;
     void operator=(const vtkDICOMImageReader2&) = delete;
-    ExtendMedicalImageProperties* properties;
+    ExtendMedicalImageProperties* properties = nullptr;
+    vtkImageData* OverLayData = nullptr;
+    bool HasOverlay = false;
 };