wip, fails with master and virtual

slsDetectorSoftware/src/DetectorImpl.cpp

@@ -1689,12 +1689,6 @@ std::vector<defs::ROI> DetectorImpl::getRxROI(int module_id) const {
     // TODO
 }
 
-bool DetectorImpl::roisOverlap(const defs::ROI &a, const defs::ROI &b) const {
-    bool xOverlap = !(a.xmax < b.xmin || a.xmin > b.xmax);
-    bool yOverlap = !(a.ymax < b.ymin || a.ymin > b.ymax);
-    return xOverlap && yOverlap;
-}
-
 void DetectorImpl::validateROIs(const std::vector<defs::ROI> &rois) {
     for (size_t i = 0; i < rois.size(); ++i) {
         const auto &roi = rois[i];
@@ -1738,31 +1732,13 @@ void DetectorImpl::validateROIs(const std::vector<defs::ROI> &rois) {
         }
 
         for (size_t j = i + 1; j < rois.size(); ++j) {
-            if (roisOverlap(rois[i], rois[j])) {
+            if (rois[i].overlap(rois[j])) {
                 throw RuntimeError("Invalid Overlapping Rois.");
             }
         }
     }
 }
 
-defs::xy DetectorImpl::calculatePosition(size_t moduleIndex,
-                                         const defs::xy &geometry) const {
-    if ((geometry.x != 0 && geometry.x != 1) ||
-        (geometry.y != 0 && geometry.y != 1)) {
-        throw RuntimeError("Invalid geometry configuration. Geometry: " +
-                           ToString(geometry));
-    }
-
-    if (moduleIndex >= static_cast<size_t>(geometry.x * geometry.y)) {
-        throw RuntimeError("Module index " + std::to_string(moduleIndex) +
-                           " out of bounds.");
-    }
-
-    int x = moduleIndex % geometry.x;
-    int y = moduleIndex / geometry.x;
-    return defs::xy{x, y};
-}
-
 defs::xy DetectorImpl::getPortGeometry() const {
     defs::xy portGeometry(1, 1);
     switch (shm()->detType) {
@@ -1780,21 +1756,22 @@ defs::xy DetectorImpl::getPortGeometry() const {
     return portGeometry;
 }
 
-defs::xy DetectorImpl::calculatePosition(int moduleIndex,
+defs::xy DetectorImpl::calculatePosition(int moduleIndex) const {
-                                         defs::xy geometry) const {
     int maxYMods = shm()->numberOfModules.y;
-    int y = (moduleIndex % maxYMods) * geometry.y;
+    int y = (moduleIndex % maxYMods);
-    int x = (moduleIndex / maxYMods) * geometry.x;
+    int x = (moduleIndex / maxYMods);
     return defs::xy{x, y};
 }
 
 defs::ROI DetectorImpl::getModuleROI(int moduleIndex) const {
     const defs::xy modSize = modules[0]->getNumberOfChannels();
     // calculate module position (not taking into account port geometry)
-    const defs::xy modPos = calculatePosition(moduleIndex, defs::xy{1, 1});
+    const defs::xy modPos = calculatePosition(moduleIndex);
-    return defs::ROI{modSize.x * modPos.x, modSize.x * (modPos.x + 1) - 1,
+    const int xmin = modSize.x * modPos.x;
-                     modSize.y * modPos.y,
+    const int xmax = xmin + modSize.x - 1;
-                     modSize.y * (modPos.y + 1) - 1}; // convert y for 1d?
+    const int ymin = modSize.y * modPos.y;
+    const int ymax = ymin + modSize.y - 1;
+    return defs::ROI{xmin, xmax, ymin, ymax};
 }
 
 void DetectorImpl::convertGlobalRoiToPortLevel(
@@ -1830,7 +1807,7 @@ void DetectorImpl::convertGlobalRoiToPortLevel(
         }
 
         // Check if user ROI overlaps with this port ROI
-        if (roisOverlap(userRoi, portRoi)) {
+        if (userRoi.overlap(portRoi)) {
             defs::ROI clipped{};
             clipped.xmin = std::max(userRoi.xmin, portRoi.xmin);
             clipped.xmax = std::min(userRoi.xmax, portRoi.xmax);
@@ -1874,7 +1851,7 @@ void DetectorImpl::setRxROI(const std::vector<defs::ROI> &args) {
         std::vector<defs::ROI> portRois(nPortsPerModule);
 
         for (const auto &arg : args) {
-            if (roisOverlap(arg, moduleGlobalRoi)) {
+            if (arg.overlap(moduleGlobalRoi)) {
                 convertGlobalRoiToPortLevel(arg, moduleGlobalRoi, portRois);
             }
         }

slsDetectorSoftware/src/DetectorImpl.h

@@ -426,9 +426,7 @@ class DetectorImpl : public virtual slsDetectorDefs {
 
     bool roisOverlap(const defs::ROI &a, const defs::ROI &b) const;
     void validateROIs(const std::vector<defs::ROI> &rois);
-    defs::xy calculatePosition(size_t moduleIndex,
+    defs::xy calculatePosition(int moduleIndex) const;
-                               const defs::xy &geometry) const;
-    defs::xy calculatePosition(int moduleIndex, defs::xy geometry) const;
     defs::ROI getModuleROI(int moduleIndex) const;
     void convertGlobalRoiToPortLevel(
         const defs::ROI &userRoi, const defs::ROI &moduleRoi,

slsReceiverSoftware/src/DataProcessor.cpp

@@ -208,11 +208,9 @@ std::string DataProcessor::CreateVirtualFile(
     const int modulePos, const int numModX, const int numModY,
     std::mutex *hdf5LibMutex) {
 
-    /*if (!multiRoiMetadata.empty() && generalData->dynamicRange == 4) {
+    int ny = generalData->nPixelsY;
-        throw std::runtime_error("Skipping virtual hdf5 file since rx_roi is "
+    if (generalData->dynamicRange == 4)
-                                 "enabled in 4 bit mode.");
+        ny = generalData->nPixelsY / 2;
-    }*/
-
     bool gotthard25um = ((generalData->detType == GOTTHARD ||
                           generalData->detType == GOTTHARD2) &&
                          (numModX * numModY) == 2);
@@ -229,7 +227,7 @@ std::string DataProcessor::CreateVirtualFile(
     return masterFileUtility::CreateVirtualHDF5File(
         filePath, fileNamePrefix, fileIndex, overWriteEnable, silentMode,
         modulePos, generalData->numUDPInterfaces, framesPerFile,
-        generalData->nPixelsX, generalData->nPixelsY, generalData->dynamicRange,
+        generalData->nPixelsX, ny, generalData->dynamicRange,
         numFramesCaught, numModX, numModY, dataFile->GetPDataType(),
         dataFile->GetParameterNames(), dataFile->GetParameterDataTypes(),
         hdf5LibMutex, gotthard25um, multiRoiMetadata);
@@ -251,7 +249,7 @@ void DataProcessor::LinkFileInMaster(const std::string &masterFileName,
     }
     masterFileUtility::LinkHDF5FileInMaster(masterfname, fname,
                                             dataFile->GetParameterNames(),
-                                            silentMode, hdf5LibMutex);
+                                            silentMode, hdf5LibMutex, multiRoiMetadata.size());
 }
 #endif
 

slsReceiverSoftware/src/MasterFileUtility.cpp

@@ -49,7 +49,7 @@ std::string CreateMasterBinaryFile(const std::string &filePath,
 void LinkHDF5FileInMaster(std::string &masterFileName,
                           std::string &dataFilename,
                           std::vector<std::string> parameterNames,
-                          const bool silentMode, std::mutex *hdf5LibMutex) {
+                          const bool silentMode, std::mutex *hdf5LibMutex, size_t multiRoiSize) {
 
     std::lock_guard<std::mutex> lock(*hdf5LibMutex);
     std::unique_ptr<H5::H5File> fd{nullptr};
@@ -67,27 +67,32 @@ void LinkHDF5FileInMaster(std::string &masterFileName,
         fd = make_unique<H5::H5File>(dataFilename.c_str(), H5F_ACC_RDONLY,
                                      H5::FileCreatPropList::DEFAULT, flist);
 
-        // create link for data dataset
+        for (size_t iRoi = 0; iRoi != multiRoiSize; ++iRoi) {
-        H5::DataSet dset = fd->openDataSet(DATASET_NAME);
-        std::string linkname =
-            std::string("/entry/data/") + std::string(DATASET_NAME);
-        if (H5Lcreate_external(dataFilename.c_str(), DATASET_NAME,
-                               masterfd.getLocId(), linkname.c_str(),
-                               H5P_DEFAULT, H5P_DEFAULT) < 0) {
-            throw RuntimeError(
-                "Could not create link to data dataset in master");
-        }
 
-        // create link for parameter datasets
+            // create link for data dataset
-        for (unsigned int i = 0; i < parameterNames.size(); ++i) {
+            std::string datasetname = DATASET_NAME + '_' + std::to_string(iRoi);
-            H5::DataSet pDset = fd->openDataSet(parameterNames[i].c_str());
+            H5::DataSet dset = fd->openDataSet(datasetname);
-            linkname = std::string("/entry/data/") + parameterNames[i];
+            std::string linkname =
-            if (H5Lcreate_external(dataFilename.c_str(),
+                std::string("/entry/data/") + datasetname;
-                                   parameterNames[i].c_str(),
+            if (H5Lcreate_external(dataFilename.c_str(), datasetname.c_str(),
-                                   masterfd.getLocId(), linkname.c_str(),
+                                masterfd.getLocId(), linkname.c_str(),
-                                   H5P_DEFAULT, H5P_DEFAULT) < 0) {
+                                H5P_DEFAULT, H5P_DEFAULT) < 0) {
                 throw RuntimeError(
-                    "Could not create link to parameter dataset in master");
+                    "Could not create link to data dataset in master");
+            }
+
+            // create link for parameter datasets
+            for (unsigned int i = 0; i < parameterNames.size(); ++i) {
+                std::string parameterDsetName = parameterNames[i] + '_' + std::to_string(iRoi);
+                H5::DataSet pDset = fd->openDataSet(parameterDsetName.c_str());
+                linkname = std::string("/entry/data/") + parameterDsetName;
+                if (H5Lcreate_external(dataFilename.c_str(),
+                                    parameterDsetName.c_str(),
+                                    masterfd.getLocId(), linkname.c_str(),
+                                    H5P_DEFAULT, H5P_DEFAULT) < 0) {
+                    throw RuntimeError(
+                        "Could not create link to parameter dataset in master");
+                }
             }
         }
         fd->close();
@@ -160,18 +165,51 @@ std::string CreateMasterHDF5File(const std::string &filePath,
     return fileName;
 }
 
+defs::ROI GetGlobalPortRoi(const int iPort, const defs::xy portSize, const int numPortsY) {
+    defs::xy portPos = {(iPort / numPortsY), (iPort % numPortsY)};
+    const int xmin = portSize.x * portPos.x;
+    const int xmax = xmin + portSize.x - 1;
+    const int ymin = portSize.y * portPos.y;
+    const int ymax = ymin + portSize.y - 1;
+    return defs::ROI{xmin, xmax, ymin, ymax}; 
+}
+
+int GetNumPortsInRoi(const defs::ROI roi, const defs::xy portSize) {
+    if (portSize.x == 0 || portSize.y == 0) {
+        throw RuntimeError("Port width or height cannot be zero");
+    }
+    int iPortXMin = roi.xmin / portSize.x;
+    int iPortXMax = roi.xmax / portSize.x;
+    int iPortYMin = roi.ymin / portSize.y;
+    int iPortYMax = roi.ymax / portSize.y;
+    return ((iPortXMax - iPortXMin + 1) * (iPortYMax - iPortYMin + 1));
+}
+
 /** Will not be called if dynamic range is 4 and roi enabled */
 std::string CreateVirtualHDF5File(
     const std::string &filePath, const std::string &fileNamePrefix,
     const uint64_t fileIndex, const bool overWriteEnable, const bool silentMode,
     const int modulePos, const int numUnitsPerReadout,
-    const uint32_t maxFramesPerFile, const uint32_t nPixelsX,
+    const uint32_t maxFramesPerFile, const int nPixelsX,
-    const uint32_t nPixelsY, const uint32_t dynamicRange,
+    const int nPixelsY, const uint32_t dynamicRange,
     const uint64_t numImagesCaught, const int numModX, const int numModY,
     const H5::DataType dataType, const std::vector<std::string> parameterNames,
     const std::vector<H5::DataType> parameterDataTypes,
     std::mutex *hdf5LibMutex, bool gotthard25um,
-    std::vector<defs::ROI> &multiRoi) {
+    std::vector<defs::ROI> multiRoi) {
+
+    // cannot create
+    if (!multiRoi.empty()) {
+        if (dynamicRange == 4) {
+            throw std::runtime_error("Skipping virtual hdf5 file since rx_roi is "
+                                 "enabled and it is in 4 bit mode.");
+        }
+        if (gotthard25um && (numModX * numModY) == 2) {
+            throw std::runtime_error("Skipping virtual hdf5 file since rx_roi is "
+                                 "enabled and there are 2 Gotthard 25um modules.");
+        }
+    }
+
 
     // virtual file name
     std::ostringstream osfn;
@@ -180,9 +218,6 @@ std::string CreateVirtualHDF5File(
     std::string fileName = osfn.str();
 
     unsigned int paraSize = parameterNames.size();
-    uint64_t numModZ = numModX;
-    uint32_t nDimy = nPixelsY;
-    uint32_t nDimz = ((dynamicRange == 4) ? (nPixelsX / 2) : nPixelsX);
 
     std::lock_guard<std::mutex> lock(*hdf5LibMutex);
 
@@ -208,7 +243,7 @@ std::string CreateVirtualHDF5File(
         attribute.write(H5::PredType::NATIVE_DOUBLE, &dValue);
 
         // complete detector in roi
-        /*if (multiRoi.size() == 1 && multiRoi[0].completeRoi()) {
+        if (multiRoi.size() == 1 && multiRoi[0].completeRoi()) {
             int ny = nPixelsY * numModY;
             int nx = nPixelsX * numModX;
             if (nPixelsY == 1) {
@@ -216,15 +251,23 @@ std::string CreateVirtualHDF5File(
             } else {
                 multiRoi.push_back(defs::ROI{0, nx - 1, 0, ny - 1});
             }
-        }*/
+        }
+
+        uint64_t depth = numImagesCaught;
+        uint64_t nports = numModX * numModY;
+        int numFiles = numImagesCaught / maxFramesPerFile;
+        if (numImagesCaught % maxFramesPerFile)
+                ++numFiles;
+        defs::xy portSize{nPixelsX, nPixelsY};
 
         for (size_t iRoi = 0; iRoi != multiRoi.size(); ++iRoi) {
+            uint64_t width = multiRoi[iRoi].width();
+            uint64_t height = multiRoi[iRoi].height();
+            uint64_t nportsInRoi = GetNumPortsInRoi(multiRoi[iRoi], portSize);
 
             // dataspace
-            hsize_t vdsDims[DATA_RANK] = {numImagesCaught, numModY * nDimy,
+            hsize_t vdsDims[DATA_RANK] = {depth, height, width};
-                                          numModZ * nDimz};
+            hsize_t vdsDimsPara[VDS_PARA_RANK] = {depth, nportsInRoi};
-            hsize_t vdsDimsPara[VDS_PARA_RANK] = {numImagesCaught,
-                                                  numModY * numModZ};
             H5::DataSpace vdsDataSpace(DATA_RANK, vdsDims, nullptr);
             H5::DataSpace vdsDataSpacePara(VDS_PARA_RANK, vdsDimsPara, nullptr);
 
@@ -239,38 +282,59 @@ std::string CreateVirtualHDF5File(
             }
 
             // hyperslab (files)
-            int numFiles = numImagesCaught / maxFramesPerFile;
-            if (numImagesCaught % maxFramesPerFile)
-                ++numFiles;
             uint64_t framesSaved = 0;
-            for (int iFile = 0; iFile < numFiles; ++iFile) {
+            for (int iFile = 0; iFile != numFiles; ++iFile) {
-
+                
-                uint64_t nDimx =
+                uint64_t nImagesInFile = numImagesCaught - framesSaved;
-                    ((numImagesCaught - framesSaved) > maxFramesPerFile)
+                if ((numImagesCaught - framesSaved) > maxFramesPerFile)
-                        ? maxFramesPerFile
+                    nImagesInFile = maxFramesPerFile;
-                        : (numImagesCaught - framesSaved);
 
+                // start location and blocksize recalculated later for each readout (because of irregular roi)
                 hsize_t startLocation[DATA_RANK] = {framesSaved, 0, 0};
+                hsize_t nx = static_cast<hsize_t>(nPixelsX);
+                hsize_t ny = static_cast<hsize_t>(nPixelsY);
+                hsize_t blockSize[DATA_RANK] = {nImagesInFile, nx, ny};
                 hsize_t strideBetweenBlocks[DATA_RANK] = {1, 1, 1};
-                hsize_t numBlocks[DATA_RANK] = {nDimx, nDimy, nDimz};
+                hsize_t numBlocks[DATA_RANK] = {1, 1, 1};
-                hsize_t blockSize[DATA_RANK] = {1, 1, 1};
 
+
+                // start location of parameter datasets is recalcualted later
                 hsize_t startLocationPara[VDS_PARA_RANK] = {framesSaved, 0};
                 hsize_t strideBetweenBlocksPara[VDS_PARA_RANK] = {1, 1};
-                hsize_t numBlocksPara[VDS_PARA_RANK] = {nDimx, 1};
+                hsize_t numBlocksPara[VDS_PARA_RANK] = {1, 1};
-                hsize_t blockSizePara[VDS_PARA_RANK] = {1, 1};
+                hsize_t blockSizePara[VDS_PARA_RANK] = {nImagesInFile, 1};
 
                 // interleaving for g2
                 if (gotthard25um) {
                     strideBetweenBlocks[2] = 2;
                 }
 
-                for (unsigned int iReadout = 0; iReadout < numModY * numModZ;
+                for (unsigned int iReadout = 0; iReadout < nports; ++iReadout) {
-                     ++iReadout) {
 
+                    // skip if roi does not overlap
+                    auto globalPortRoi = GetGlobalPortRoi(iReadout, portSize, numModY);
+                    if (!globalPortRoi.overlap(multiRoi[iRoi]))
+                        continue; 
+
+                    // calculate start location  (with roi)
+                    int xmin = std::max(multiRoi[iRoi].xmin, globalPortRoi.xmin);
+                    int xmax = std::min(multiRoi[iRoi].xmax, globalPortRoi.xmax);
+                    int ymin = std::max(multiRoi[iRoi].ymin, globalPortRoi.ymin);
+                    int ymax = std::min(multiRoi[iRoi].ymax, globalPortRoi.ymax);
+                    uint32_t portRoiHeight  = ymax - ymin + 1;
+                    uint32_t portRoiWidth  = xmax - xmin + 1;
+
+                    // recalculating start location and block size
+                    ++startLocationPara[1];
+                    if (!gotthard25um) {
+                        startLocation[1] = ymin;
+                        startLocation[2] = xmin;
+                        blockSize[1] = portRoiHeight;
+                        blockSize[2] = portRoiWidth;
+                    }
                     // interleaving for g2 (startLocation is 0 and 1)
-                    if (gotthard25um) {
+                    else {
-                        startLocation[2] = iReadout;
+                        ++startLocation[2];
                     }
 
                     vdsDataSpace.selectHyperslab(
@@ -299,11 +363,11 @@ std::string CreateVirtualHDF5File(
                     }
 
                     // source dataspace
-                    hsize_t srcDims[DATA_RANK] = {nDimx, nDimy, nDimz};
+                    hsize_t srcDims[DATA_RANK] = {nImagesInFile, portRoiHeight, portRoiWidth};
-                    hsize_t srcDimsMax[DATA_RANK] = {H5S_UNLIMITED, nDimy,
+                    hsize_t srcDimsMax[DATA_RANK] = {H5S_UNLIMITED, portRoiHeight,
-                                                     nDimz};
+                                                     portRoiWidth};
                     H5::DataSpace srcDataSpace(DATA_RANK, srcDims, srcDimsMax);
-                    hsize_t srcDimsPara[PARA_RANK] = {nDimx};
+                    hsize_t srcDimsPara[PARA_RANK] = {nImagesInFile};
                     hsize_t srcDimsMaxPara[PARA_RANK] = {H5S_UNLIMITED};
                     H5::DataSpace srcDataSpacePara(PARA_RANK, srcDimsPara,
                                                    srcDimsMaxPara);
@@ -312,8 +376,8 @@ std::string CreateVirtualHDF5File(
                     // virtual parameter datasets error loading (bad scalar
                     // value))
                     // TODO WHY????
-                    /*if (nDimx != maxFramesPerFile) {
+                    /*if (nDimz != maxFramesPerFile) {
-                        hsize_t count[1] = {nDimx};
+                        hsize_t count[1] = {nDimz};
                         hsize_t start[1] = {0};
                         srcDataSpacePara.selectHyperslab(
                             H5S_SELECT_SET, count, start,
@@ -321,27 +385,22 @@ std::string CreateVirtualHDF5File(
                     }*/
 
                     // mapping of property list
+                    std::string datasetname = DATASET_NAME + '_' + std::to_string(iRoi);
                     plist.setVirtual(vdsDataSpace, relative_srcFileName.c_str(),
-                                     DATASET_NAME, srcDataSpace);
+                                     datasetname.c_str(), srcDataSpace);
                     for (unsigned int p = 0; p < paraSize; ++p) {
+                        std::string parameterDsetName = parameterNames[p] + '_' + std::to_string(iRoi);
                         plistPara[p].setVirtual(
                             vdsDataSpacePara, relative_srcFileName.c_str(),
-                            parameterNames[p].c_str(), srcDataSpacePara);
+                            parameterDsetName.c_str(), srcDataSpacePara);
                     }
 
                     // H5Sclose(srcDataspace);
                     // H5Sclose(srcDataspace_para);
 
-                    if (!gotthard25um) {
-                        startLocation[2] += nDimz;
-                        if (startLocation[2] >= (numModZ * nDimz)) {
-                            startLocation[2] = 0;
-                            startLocation[1] += nDimy;
-                        }
-                    }
                     ++startLocationPara[1];
                 }
-                framesSaved += nDimx;
+                framesSaved += nImagesInFile;
             }
             // datasets
             H5::DataSet vdsDataSet(

slsReceiverSoftware/src/MasterFileUtility.h

@@ -21,7 +21,7 @@ std::string CreateMasterBinaryFile(const std::string &filePath,
 void LinkHDF5FileInMaster(std::string &masterFileName,
                           std::string &dataFilename,
                           std::vector<std::string> parameterNames,
-                          const bool silentMode, std::mutex *hdf5LibMutex);
+                          const bool silentMode, std::mutex *hdf5LibMutex, size_t multiRoiSize);
 
 std::string CreateMasterHDF5File(const std::string &filePath,
                                  const std::string &fileNamePrefix,
@@ -29,18 +29,20 @@ std::string CreateMasterHDF5File(const std::string &filePath,
                                  const bool overWriteEnable,
                                  const bool silentMode, MasterAttributes *attr,
                                  std::mutex *hdf5LibMutex);
+defs::ROI GetGlobalPortRoi(const int iPort, const defs::xy portSize, const int numPortsY);
+int GetNumPortsInRoi(const defs::ROI roi, const defs::xy portSize);
 
 std::string CreateVirtualHDF5File(
     const std::string &filePath, const std::string &fileNamePrefix,
     const uint64_t fileIndex, const bool overWriteEnable, const bool silentMode,
     const int modulePos, const int numUnitsPerReadout,
-    const uint32_t maxFramesPerFile, const uint32_t nPixelsX,
+    const uint32_t maxFramesPerFile, const int nPixelsX,
-    const uint32_t nPixelsY, const uint32_t dynamicRange,
+    const int nPixelsY, const uint32_t dynamicRange,
     const uint64_t numImagesCaught, const int numModX, const int numModY,
     const H5::DataType dataType, const std::vector<std::string> parameterNames,
     const std::vector<H5::DataType> parameterDataTypes,
     std::mutex *hdf5LibMutex, bool gotthard25um,
-    std::vector<defs::ROI> &multiRoi);
+    std::vector<defs::ROI> multiRoi);
 #endif
 } // namespace masterFileUtility
 

slsSupportLib/include/sls/sls_detector_defs.h

@@ -230,6 +230,12 @@ class slsDetectorDefs {
         ROI(int xmin, int xmax) : xmin(xmin), xmax(xmax){};
         ROI(int xmin, int xmax, int ymin, int ymax)
             : xmin(xmin), xmax(xmax), ymin(ymin), ymax(ymax){};
+        constexpr int width() const {
+            return (xmax - xmin + 1);
+        }   
+        constexpr int height() const {
+            return (ymax - ymin + 1);
+        }
         constexpr std::array<int, 4> getIntArray() const {
             return std::array<int, 4>({xmin, xmax, ymin, ymax});
         }
@@ -246,6 +252,10 @@ class slsDetectorDefs {
             ymin = 0;
             ymax = 0;
         }
+        constexpr bool overlap(const ROI & other) const {
+            return ((xmin <= other.xmax && xmax >= other.xmin) &&
+                    (ymin <= other.ymax && ymax >= other.ymin));
+        }
         constexpr bool operator==(const ROI &other) const {
             return ((xmin == other.xmin) && (xmax == other.xmax) &&
                     (ymin == other.ymin) && (ymax == other.ymax));