# HG changeset patch
# User Sebastien Jodogne <s.jodogne@gmail.com>
# Date 1688999026 -7200
# Node ID 30fb01ce97a380919fa1d897e7c625b9d4619ed8
# Parent  ca605878dc73e63fdb86fb159d89254ac8cc9eac# Parent  a6e4834ac1414a7e0c086ef210c6b67bc5e8d13a
integration mainline->iiif

diff -r a6e4834ac141 -r 30fb01ce97a3 Applications/Dicomizer.cpp
--- a/Applications/Dicomizer.cpp	Mon Jul 10 16:22:14 2023 +0200
+++ b/Applications/Dicomizer.cpp	Mon Jul 10 16:23:46 2023 +0200
@@ -344,7 +344,7 @@
   }
 
   // VL Whole Slide Microscopy Image IOD
-  OrthancWSI::DicomToolbox::SetStringTag(*dataset, DCM_SOPClassUID, "1.2.840.10008.5.1.4.1.1.77.1.6");
+  OrthancWSI::DicomToolbox::SetStringTag(*dataset, DCM_SOPClassUID, VL_WHOLE_SLIDE_MICROSCOPY_IMAGE_STORAGE_IOD);
 
   // Slide Microscopy
   OrthancWSI::DicomToolbox::SetStringTag(*dataset, DCM_Modality, "SM");  
diff -r a6e4834ac141 -r 30fb01ce97a3 Framework/Enumerations.h
--- a/Framework/Enumerations.h	Mon Jul 10 16:22:14 2023 +0200
+++ b/Framework/Enumerations.h	Mon Jul 10 16:23:46 2023 +0200
@@ -29,6 +29,8 @@
 
 namespace OrthancWSI
 {
+  static const char* const VL_WHOLE_SLIDE_MICROSCOPY_IMAGE_STORAGE_IOD = "1.2.840.10008.5.1.4.1.1.77.1.6";
+
   // WARNING - Don't change the enum values below, as this would break
   // serialization of "DicomPyramidInstance"
   enum ImageCompression
diff -r a6e4834ac141 -r 30fb01ce97a3 Framework/Inputs/DicomPyramidInstance.cpp
--- a/Framework/Inputs/DicomPyramidInstance.cpp	Mon Jul 10 16:22:14 2023 +0200
+++ b/Framework/Inputs/DicomPyramidInstance.cpp	Mon Jul 10 16:23:46 2023 +0200
@@ -160,7 +160,7 @@
     FullOrthancDataset dataset(orthanc, "/instances/" + instanceId + "/tags");
     DicomDatasetReader reader(dataset);
 
-    if (reader.GetMandatoryStringValue(Orthanc::DicomPath(Orthanc::DICOM_TAG_SOP_CLASS_UID)) != "1.2.840.10008.5.1.4.1.1.77.1.6" ||
+    if (reader.GetMandatoryStringValue(Orthanc::DicomPath(Orthanc::DICOM_TAG_SOP_CLASS_UID)) != VL_WHOLE_SLIDE_MICROSCOPY_IMAGE_STORAGE_IOD ||
         reader.GetMandatoryStringValue(Orthanc::DicomPath(Orthanc::DICOM_TAG_MODALITY)) != "SM")
     {
       throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
diff -r a6e4834ac141 -r 30fb01ce97a3 NEWS
--- a/NEWS	Mon Jul 10 16:22:14 2023 +0200
+++ b/NEWS	Mon Jul 10 16:23:46 2023 +0200
@@ -1,6 +1,9 @@
 Pending changes in the mainline
 ===============================
 
+* Support of IIIF
+
+
 Version 1.1 (2021-12-11)
 ========================
 
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/CMakeLists.txt
--- a/ViewerPlugin/CMakeLists.txt	Mon Jul 10 16:22:14 2023 +0200
+++ b/ViewerPlugin/CMakeLists.txt	Mon Jul 10 16:23:46 2023 +0200
@@ -173,6 +173,7 @@
   ORTHANC_EXPLORER  ${CMAKE_SOURCE_DIR}/OrthancExplorer.js
   VIEWER_HTML       ${CMAKE_SOURCE_DIR}/viewer.html
   VIEWER_JS         ${CMAKE_SOURCE_DIR}/viewer.js
+  MIRADOR_HTML      ${CMAKE_SOURCE_DIR}/mirador.html
   )
 
 
@@ -183,8 +184,10 @@
 
 set(ORTHANC_WSI_SOURCES
   DicomPyramidCache.cpp
+  IIIF.cpp
   OrthancPluginConnection.cpp
   Plugin.cpp
+  RawTile.cpp
 
   ${ORTHANC_WSI_DIR}/Framework/DicomToolbox.cpp
   ${ORTHANC_WSI_DIR}/Framework/Enumerations.cpp
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/DicomPyramidCache.cpp
--- a/ViewerPlugin/DicomPyramidCache.cpp	Mon Jul 10 16:22:14 2023 +0200
+++ b/ViewerPlugin/DicomPyramidCache.cpp	Mon Jul 10 16:23:46 2023 +0200
@@ -23,10 +23,15 @@
 #include "../Framework/PrecompiledHeadersWSI.h"
 #include "DicomPyramidCache.h"
 
+#include "OrthancPluginConnection.h"
+
 #include <Compatibility.h>  // For std::unique_ptr
 
 #include <cassert>
 
+static std::unique_ptr<OrthancWSI::DicomPyramidCache>  singleton_;
+
+
 namespace OrthancWSI
 {
   DicomPyramid* DicomPyramidCache::GetCachedPyramid(const std::string& seriesId)
@@ -67,8 +72,9 @@
     // time-consuming operation, we don't want it to block other clients)
     lock.unlock();
 
+    assert(orthanc_.get() != NULL);
     std::unique_ptr<DicomPyramid> pyramid
-      (new DicomPyramid(orthanc_, seriesId, true /* use metadata cache */));
+      (new DicomPyramid(*orthanc_, seriesId, true /* use metadata cache */));
 
     {
       // The pyramid is constructed: Store it into the cache
@@ -112,11 +118,15 @@
   }
 
 
-  DicomPyramidCache::DicomPyramidCache(OrthancStone::IOrthancConnection& orthanc,
+  DicomPyramidCache::DicomPyramidCache(OrthancStone::IOrthancConnection* orthanc /* takes ownership */,
                                        size_t maxSize) :
     orthanc_(orthanc),
     maxSize_(maxSize)
   {
+    if (orthanc == NULL)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
+    }
   }
 
 
@@ -135,6 +145,45 @@
   }
 
 
+  void DicomPyramidCache::InitializeInstance(size_t maxSize)
+  {
+    if (singleton_.get() == NULL)
+    {
+      singleton_.reset(new DicomPyramidCache(new OrthancWSI::OrthancPluginConnection, maxSize));
+    }
+    else
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
+    }
+  }
+
+
+  void DicomPyramidCache::FinalizeInstance()
+  {
+    if (singleton_.get() == NULL)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
+    }
+    else
+    {
+      singleton_.reset(NULL);
+    }
+  }
+
+
+  DicomPyramidCache& DicomPyramidCache::GetInstance()
+  {
+    if (singleton_.get() == NULL)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
+    }
+    else
+    {
+      return *singleton_;
+    }
+  }
+
+
   void DicomPyramidCache::Invalidate(const std::string& seriesId)
   {
     boost::mutex::scoped_lock  lock(mutex_);
@@ -151,10 +200,10 @@
   }
 
 
-  DicomPyramidCache::Locker::Locker(DicomPyramidCache& cache,
-                                    const std::string& seriesId) :
-    lock_(cache.mutex_),
-    pyramid_(cache.GetPyramid(seriesId, lock_))
+  DicomPyramidCache::Locker::Locker(const std::string& seriesId) :
+    cache_(DicomPyramidCache::GetInstance()),
+    lock_(cache_.mutex_),
+    pyramid_(cache_.GetPyramid(seriesId, lock_))
   {
   }
 }
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/DicomPyramidCache.h
--- a/ViewerPlugin/DicomPyramidCache.h	Mon Jul 10 16:22:14 2023 +0200
+++ b/ViewerPlugin/DicomPyramidCache.h	Mon Jul 10 16:23:46 2023 +0200
@@ -27,6 +27,8 @@
 #include <Cache/LeastRecentlyUsedIndex.h>
 
 #include <boost/thread/mutex.hpp>
+#include <string>
+
 
 namespace OrthancWSI
 {
@@ -35,11 +37,14 @@
   private:
     typedef Orthanc::LeastRecentlyUsedIndex<std::string, DicomPyramid*>  Cache;
 
-    boost::mutex                       mutex_;
-    OrthancStone::IOrthancConnection&  orthanc_;
-    size_t                             maxSize_;
-    Cache                              cache_;
+    std::unique_ptr<OrthancStone::IOrthancConnection>  orthanc_;
 
+    boost::mutex  mutex_;
+    size_t        maxSize_;
+    Cache         cache_;
+
+    DicomPyramidCache(OrthancStone::IOrthancConnection* orthanc /* takes ownership */,
+                      size_t maxSize);
 
     DicomPyramid* GetCachedPyramid(const std::string& seriesId);
 
@@ -47,22 +52,25 @@
                              boost::mutex::scoped_lock& lock);
 
   public:
-    DicomPyramidCache(OrthancStone::IOrthancConnection& orthanc,
-                      size_t maxSize);
+    ~DicomPyramidCache();
+
+    static void InitializeInstance(size_t maxSize);
 
-    ~DicomPyramidCache();
+    static void FinalizeInstance();
+
+    static DicomPyramidCache& GetInstance();
 
     void Invalidate(const std::string& seriesId);
 
     class Locker : public boost::noncopyable
     {
     private:
+      DicomPyramidCache&         cache_;
       boost::mutex::scoped_lock  lock_;
       DicomPyramid&              pyramid_;
 
     public:
-      Locker(DicomPyramidCache& cache,
-             const std::string& seriesId);
+      Locker(const std::string& seriesId);
 
       DicomPyramid& GetPyramid() const
       {
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/IIIF.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ViewerPlugin/IIIF.cpp	Mon Jul 10 16:23:46 2023 +0200
@@ -0,0 +1,592 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2023 Osimis S.A., Belgium
+ * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "../Framework/PrecompiledHeadersWSI.h"
+#include "IIIF.h"
+
+#include "DicomPyramidCache.h"
+#include "RawTile.h"
+#include "../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h"
+
+#include <Images/Image.h>
+#include <Images/ImageProcessing.h>
+#include <Logging.h>
+#include <SerializationToolbox.h>
+
+#include <boost/regex.hpp>
+#include <boost/math/special_functions/round.hpp>
+
+
+static const char* const ROWS = "0028,0010";
+static const char* const COLUMNS = "0028,0011";
+
+
+static std::string  iiifPublicUrl_;
+
+
+static void ServeIIIFTiledImageInfo(OrthancPluginRestOutput* output,
+                                    const char* url,
+                                    const OrthancPluginHttpRequest* request)
+{
+  const std::string seriesId(request->groups[0]);
+
+  LOG(INFO) << "IIIF: Image API call to whole-slide pyramid of series " << seriesId;
+
+  OrthancWSI::DicomPyramidCache::Locker locker(seriesId);
+
+  if (locker.GetPyramid().GetLevelCount() == 0)
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+  }
+
+  if (locker.GetPyramid().GetTileWidth(0) != locker.GetPyramid().GetTileHeight(0))
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat,
+                                    "IIIF doesn't support non-isotropic tile sizes");
+  }
+
+  for (unsigned int i = 1; i < locker.GetPyramid().GetLevelCount(); i++)
+  {
+    if (locker.GetPyramid().GetTileWidth(i) != locker.GetPyramid().GetTileWidth(0) ||
+        locker.GetPyramid().GetTileHeight(i) != locker.GetPyramid().GetTileHeight(0))
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat,
+                                      "IIIF doesn't support levels with varying tile sizes");
+    }
+  }
+
+  Json::Value sizes = Json::arrayValue;
+  Json::Value scaleFactors = Json::arrayValue;
+
+  for (unsigned int i = locker.GetPyramid().GetLevelCount(); i > 0; i--)
+  {
+    /**
+     * Openseadragon seems to have difficulties in rendering
+     * non-integer scale factors. Consequently, we only keep the
+     * levels with an integer scale factor.
+     **/
+    if (locker.GetPyramid().GetLevelWidth(0) % locker.GetPyramid().GetLevelWidth(i - 1) == 0 &&
+        locker.GetPyramid().GetLevelHeight(0) % locker.GetPyramid().GetLevelHeight(i - 1) == 0)
+    {
+      Json::Value level;
+      level["width"] = locker.GetPyramid().GetLevelWidth(i - 1);
+      level["height"] = locker.GetPyramid().GetLevelHeight(i - 1);
+      sizes.append(level);
+
+      scaleFactors.append(static_cast<float>(locker.GetPyramid().GetLevelWidth(0)) /
+                          static_cast<float>(locker.GetPyramid().GetLevelWidth(i - 1)));
+    }
+  }
+
+  Json::Value tiles;
+  tiles["width"] = locker.GetPyramid().GetTileWidth(0);
+  tiles["height"] = locker.GetPyramid().GetTileHeight(0);
+  tiles["scaleFactors"] = scaleFactors;
+
+  Json::Value result;
+  result["@context"] = "http://iiif.io/api/image/2/context.json";
+  result["@id"] = iiifPublicUrl_ + "tiles/" + seriesId;
+  result["profile"] = "http://iiif.io/api/image/2/level0.json";
+  result["protocol"] = "http://iiif.io/api/image";
+  result["width"] = locker.GetPyramid().GetLevelWidth(0);
+  result["height"] = locker.GetPyramid().GetLevelHeight(0);
+  result["sizes"] = sizes;
+
+  result["tiles"] = Json::arrayValue;
+  result["tiles"].append(tiles);
+
+  std::string s = result.toStyledString();
+  OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, s.c_str(), s.size(), Orthanc::EnumerationToString(Orthanc::MimeType_Json));
+}
+
+
+static unsigned int GetPhysicalTileWidth(const OrthancWSI::ITiledPyramid& pyramid,
+                                         unsigned int level)
+{
+  return static_cast<unsigned int>(boost::math::iround(
+                                     static_cast<float>(pyramid.GetTileWidth(level)) *
+                                     static_cast<float>(pyramid.GetLevelWidth(0)) /
+                                     static_cast<float>(pyramid.GetLevelWidth(level))));
+}
+
+
+static unsigned int GetPhysicalTileHeight(const OrthancWSI::ITiledPyramid& pyramid,
+                                          unsigned int level)
+{
+  return static_cast<unsigned int>(boost::math::iround(
+                                     static_cast<float>(pyramid.GetTileHeight(level)) *
+                                     static_cast<float>(pyramid.GetLevelHeight(0)) /
+                                     static_cast<float>(pyramid.GetLevelHeight(level))));
+}
+
+
+static void ServeIIIFTiledImageTile(OrthancPluginRestOutput* output,
+                                    const char* url,
+                                    const OrthancPluginHttpRequest* request)
+{
+  const std::string seriesId(request->groups[0]);
+  const std::string region(request->groups[1]);
+  const std::string size(request->groups[2]);
+  const std::string rotation(request->groups[3]);
+  const std::string quality(request->groups[4]);
+  const std::string format(request->groups[5]);
+
+  LOG(INFO) << "IIIF: Image API call to tile of series " << seriesId << ": "
+            << "region=" << region << "; size=" << size << "; rotation="
+            << rotation << "; quality=" << quality << "; format=" << format;
+
+  if (rotation != "0")
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, "IIIF - Unsupported rotation: " + rotation);
+  }
+
+  if (quality != "default")
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, "IIIF - Unsupported quality: " + quality);
+  }
+
+  if (format != "jpg")
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, "IIIF - Unsupported format: " + format);
+  }
+
+  if (region == "full")
+  {
+    OrthancWSI::DicomPyramidCache::Locker locker(seriesId);
+
+    OrthancWSI::ITiledPyramid& pyramid = locker.GetPyramid();
+    const unsigned int level = pyramid.GetLevelCount() - 1;
+
+    Orthanc::Image full(Orthanc::PixelFormat_RGB24, pyramid.GetLevelWidth(level), pyramid.GetLevelHeight(level), false);
+    Orthanc::ImageProcessing::Set(full, 255, 255, 255, 0);
+
+    const unsigned int nx = OrthancWSI::CeilingDivision(pyramid.GetLevelWidth(level), pyramid.GetTileWidth(level));
+    const unsigned int ny = OrthancWSI::CeilingDivision(pyramid.GetLevelHeight(level), pyramid.GetTileHeight(level));
+    for (unsigned int ty = 0; ty < ny; ty++)
+    {
+      const unsigned int y = ty * pyramid.GetTileHeight(level);
+      const unsigned int height = std::min(pyramid.GetTileHeight(level), full.GetHeight() - y);
+
+      for (unsigned int tx = 0; tx < nx; tx++)
+      {
+        const unsigned int x = tx * pyramid.GetTileWidth(level);
+        std::unique_ptr<Orthanc::ImageAccessor> tile(pyramid.DecodeTile(level, tx, ty));
+
+        const unsigned int width = std::min(pyramid.GetTileWidth(level), full.GetWidth() - x);
+
+        Orthanc::ImageAccessor source, target;
+        tile->GetRegion(source, 0, 0, width, height);
+        full.GetRegion(target, x, y, width, height);
+
+        Orthanc::ImageProcessing::Copy(target, source);
+      }
+    }
+
+    std::string encoded;
+    OrthancWSI::RawTile::Encode(encoded, full, Orthanc::MimeType_Jpeg);
+
+    OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, encoded.c_str(),
+                              encoded.size(), Orthanc::EnumerationToString(Orthanc::MimeType_Jpeg));
+  }
+  else
+  {
+    int regionX, regionY, regionWidth, regionHeight;
+
+    bool ok = false;
+    boost::regex regionPattern("([0-9]+),([0-9]+),([0-9]+),([0-9]+)");
+    boost::cmatch regionWhat;
+    if (regex_match(region.c_str(), regionWhat, regionPattern))
+    {
+      try
+      {
+        regionX = boost::lexical_cast<int>(regionWhat[1]);
+        regionY = boost::lexical_cast<int>(regionWhat[2]);
+        regionWidth = boost::lexical_cast<int>(regionWhat[3]);
+        regionHeight = boost::lexical_cast<int>(regionWhat[4]);
+        ok = (regionX >= 0 &&
+              regionY >= 0 &&
+              regionWidth > 0 &&
+              regionHeight > 0);
+      }
+      catch (boost::bad_lexical_cast&)
+      {
+      }
+    }
+
+    if (!ok)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, "IIIF - Not a (x,y,width,height) region: " + region);
+    }
+
+    int cropWidth;
+    boost::regex sizePattern("([0-9]+),");
+    boost::cmatch sizeWhat;
+    if (regex_match(size.c_str(), sizeWhat, sizePattern))
+    {
+      try
+      {
+        cropWidth = boost::lexical_cast<int>(sizeWhat[1]);
+        ok = (cropWidth > 0);
+      }
+      catch (boost::bad_lexical_cast&)
+      {
+      }
+    }
+
+    if (!ok)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, "IIIF - Not a (width,) size: " + size);
+    }
+
+    std::unique_ptr<OrthancWSI::RawTile> rawTile;
+    std::unique_ptr<Orthanc::ImageAccessor> toCrop;
+
+    {
+      OrthancWSI::DicomPyramidCache::Locker locker(seriesId);
+
+      OrthancWSI::ITiledPyramid& pyramid = locker.GetPyramid();
+
+      unsigned int level;
+      for (level = 0; level < pyramid.GetLevelCount(); level++)
+      {
+        const unsigned int physicalTileWidth = GetPhysicalTileWidth(pyramid, level);
+        const unsigned int physicalTileHeight = GetPhysicalTileHeight(pyramid, level);
+
+        if (regionX % physicalTileWidth == 0 &&
+            regionY % physicalTileHeight == 0 &&
+            static_cast<unsigned int>(regionWidth) <= physicalTileWidth &&
+            static_cast<unsigned int>(regionHeight) <= physicalTileHeight &&
+            static_cast<unsigned int>(regionX + regionWidth) <= pyramid.GetLevelWidth(0) &&
+            static_cast<unsigned int>(regionY + regionHeight) <= pyramid.GetLevelHeight(0))
+        {
+          break;
+        }
+      }
+
+      if (level == pyramid.GetLevelCount())
+      {
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_BadRequest, "IIIF - Cannot locate the level of interest");
+      }
+      else if (static_cast<unsigned int>(cropWidth) > pyramid.GetTileWidth(level))
+      {
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_BadRequest, "IIIF - Request for a cropping that is too large for the tile size");
+      }
+      else
+      {
+        rawTile.reset(new OrthancWSI::RawTile(locker.GetPyramid(), level,
+                                              regionX / GetPhysicalTileWidth(pyramid, level),
+                                              regionY / GetPhysicalTileHeight(pyramid, level)));
+
+        if (static_cast<unsigned int>(cropWidth) < pyramid.GetTileWidth(level))
+        {
+          toCrop.reset(rawTile->Decode());
+          rawTile.reset(NULL);
+        }
+      }
+    }
+
+    if (rawTile.get() != NULL)
+    {
+      assert(toCrop.get() == NULL);
+
+      // Level 0 Compliance of IIIF expects JPEG files
+      rawTile->Answer(output, Orthanc::MimeType_Jpeg);
+    }
+    else if (toCrop.get() != NULL)
+    {
+      assert(rawTile.get() == NULL);
+      assert(static_cast<unsigned int>(cropWidth) < toCrop->GetWidth());
+
+      Orthanc::ImageAccessor cropped;
+      toCrop->GetRegion(cropped, 0, 0, cropWidth, toCrop->GetHeight());
+
+      std::string encoded;
+      OrthancWSI::RawTile::Encode(encoded, cropped, Orthanc::MimeType_Jpeg);
+
+      OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, encoded.c_str(),
+                                encoded.size(), Orthanc::EnumerationToString(Orthanc::MimeType_Jpeg));
+    }
+    else
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+    }
+  }
+}
+
+
+static void AddCanvas(Json::Value& manifest,
+                      const std::string& seriesId,
+                      const std::string& imageService,
+                      unsigned int page,
+                      unsigned int width,
+                      unsigned int height,
+                      const std::string& description)
+{
+  const std::string base = iiifPublicUrl_ + seriesId;
+
+  Json::Value service;
+  service["id"] = iiifPublicUrl_ + imageService;
+  service["profile"] = "level0";
+  service["type"] = "ImageService3";
+
+  Json::Value body;
+  body["id"] = iiifPublicUrl_ + imageService + "/full/max/0/default.jpg";
+  body["type"] = "Image";
+  body["format"] = Orthanc::EnumerationToString(Orthanc::MimeType_Jpeg);
+  body["height"] = height;
+  body["width"] = width;
+  body["service"].append(service);
+
+  Json::Value annotation;
+  annotation["id"] = base + "/annotation/p" + boost::lexical_cast<std::string>(page) + "-image";
+  annotation["type"] = "Annotation";
+  annotation["motivation"] = "painting";
+  annotation["body"] = body;
+  annotation["target"] = base + "/canvas/p" + boost::lexical_cast<std::string>(page);
+
+  Json::Value annotationPage;
+  annotationPage["id"] = base + "/page/p" + boost::lexical_cast<std::string>(page) + "/1";
+  annotationPage["type"] = "AnnotationPage";
+  annotationPage["items"].append(annotation);
+
+  Json::Value canvas;
+  canvas["id"] = annotation["target"];
+  canvas["type"] = "Canvas";
+  canvas["width"] = width;
+  canvas["height"] = height;
+  canvas["label"]["en"].append(description);
+  canvas["items"].append(annotationPage);
+
+  manifest["items"].append(canvas);
+}
+
+
+static void ServeIIIFManifest(OrthancPluginRestOutput* output,
+                              const char* url,
+                              const OrthancPluginHttpRequest* request)
+{
+  static const char* const KEY_INSTANCES = "Instances";
+  static const char* const SOP_CLASS_UID = "0008,0016";
+  static const char* const SLICES_SHORT = "SlicesShort";
+
+  const std::string seriesId(request->groups[0]);
+
+  LOG(INFO) << "IIIF: Presentation API call to series " << seriesId;
+
+  Json::Value study, series;
+  if (!OrthancPlugins::RestApiGet(series, "/series/" + seriesId, false) ||
+      !OrthancPlugins::RestApiGet(study, "/series/" + seriesId + "/study", false))
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
+  }
+
+  if (study.type() != Json::objectValue ||
+      series.type() != Json::objectValue ||
+      !series.isMember(KEY_INSTANCES) ||
+      series[KEY_INSTANCES].type() != Json::arrayValue ||
+      series[KEY_INSTANCES].size() == 0u ||
+      series[KEY_INSTANCES][0].type() != Json::stringValue)
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+  }
+
+  Json::Value oneInstance;
+  if (!OrthancPlugins::RestApiGet(oneInstance, "/instances/" + series[KEY_INSTANCES][0].asString() + "/tags?short", false) ||
+      oneInstance.type() != Json::objectValue ||
+      !oneInstance.isMember(SOP_CLASS_UID) ||
+      oneInstance[SOP_CLASS_UID].type() != Json::stringValue)
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
+  }
+
+  const std::string sopClassUid = Orthanc::Toolbox::StripSpaces(oneInstance[SOP_CLASS_UID].asString());
+
+  const std::string base = iiifPublicUrl_ + seriesId;
+
+  Json::Value manifest;
+  manifest["@context"] = "http://iiif.io/api/presentation/3/context.json";
+  manifest["id"] = base + "/manifest.json";
+  manifest["type"] = "Manifest";
+  manifest["label"]["en"].append(study["MainDicomTags"]["StudyDate"].asString() + " - " +
+                                 series["MainDicomTags"]["Modality"].asString() + " - " +
+                                 study["MainDicomTags"]["StudyDescription"].asString() + " - " +
+                                 series["MainDicomTags"]["SeriesDescription"].asString());
+
+  if (sopClassUid == OrthancWSI::VL_WHOLE_SLIDE_MICROSCOPY_IMAGE_STORAGE_IOD)
+  {
+    /**
+     * This is based on IIIF cookbook: "Support Deep Viewing with Basic
+     * Use of a IIIF Image Service."
+     * https://iiif.io/api/cookbook/recipe/0005-image-service/
+     **/
+    unsigned int width, height;
+
+    {
+      OrthancWSI::DicomPyramidCache::Locker locker(seriesId);
+      width = locker.GetPyramid().GetLevelWidth(0);
+      height = locker.GetPyramid().GetLevelHeight(0);
+    }
+
+    AddCanvas(manifest, seriesId, "tiles/" + seriesId, 1, width, height, "");
+  }
+  else
+  {
+    /**
+     * This is based on IIIF cookbook: "Simple Manifest - Book"
+     * https://iiif.io/api/cookbook/recipe/0009-book-1/
+     **/
+
+    manifest["behavior"].append("individuals");
+
+    uint32_t width, height;
+    if (!oneInstance.isMember(COLUMNS) ||
+        !oneInstance.isMember(ROWS) ||
+        oneInstance[COLUMNS].type() != Json::stringValue ||
+        oneInstance[ROWS].type() != Json::stringValue ||
+        !Orthanc::SerializationToolbox::ParseFirstUnsignedInteger32(width, oneInstance[COLUMNS].asString()) ||
+        !Orthanc::SerializationToolbox::ParseFirstUnsignedInteger32(height, oneInstance[ROWS].asString()))
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
+    }
+
+    Json::Value orderedSlices;
+    if (!OrthancPlugins::RestApiGet(orderedSlices, "/series/" + seriesId + "/ordered-slices", false))
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
+    }
+
+    if (orderedSlices.type() != Json::objectValue ||
+        !orderedSlices.isMember(SLICES_SHORT) ||
+        orderedSlices[SLICES_SHORT].type() != Json::arrayValue)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+    }
+
+    const Json::Value& slicesShort = orderedSlices[SLICES_SHORT];
+
+    unsigned int page = 1;
+    for (Json::ArrayIndex instance = 0; instance < slicesShort.size(); instance++)
+    {
+      if (slicesShort[instance].type() != Json::arrayValue ||
+          slicesShort[instance].size() != 3u ||
+          slicesShort[instance][0].type() != Json::stringValue ||
+          slicesShort[instance][1].type() != Json::intValue ||
+          slicesShort[instance][2].type() != Json::intValue)
+      {
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+      }
+
+      const std::string instanceId = slicesShort[instance][0].asString();
+      const unsigned int start = slicesShort[instance][1].asUInt();
+      const unsigned int count = slicesShort[instance][2].asUInt();
+
+      for (unsigned int frame = start; frame < start + count; frame++, page++)
+      {
+        AddCanvas(manifest, instanceId, "frames/" + instanceId + "/" + boost::lexical_cast<std::string>(frame),
+                  page, width, height, "");
+      }
+    }
+  }
+
+  std::string s = manifest.toStyledString();
+  OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, s.c_str(), s.size(), Orthanc::EnumerationToString(Orthanc::MimeType_Json));
+}
+
+
+static void ServeIIIFFrameInfo(OrthancPluginRestOutput* output,
+                               const char* url,
+                               const OrthancPluginHttpRequest* request)
+{
+  const std::string instanceId(request->groups[0]);
+  const std::string frame(request->groups[1]);
+
+  LOG(INFO) << "IIIF: Image API call to manifest of instance " << instanceId << " at frame " << frame;
+
+  Json::Value instance;
+  if (!OrthancPlugins::RestApiGet(instance, "/instances/" + instanceId + "/tags?short", false))
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
+  }
+
+  uint32_t width, height;
+  if (!instance.isMember(COLUMNS) ||
+      !instance.isMember(ROWS) ||
+      instance[COLUMNS].type() != Json::stringValue ||
+      instance[ROWS].type() != Json::stringValue ||
+      !Orthanc::SerializationToolbox::ParseFirstUnsignedInteger32(width, instance[COLUMNS].asString()) ||
+      !Orthanc::SerializationToolbox::ParseFirstUnsignedInteger32(height, instance[ROWS].asString()))
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
+  }
+
+  Json::Value tile;
+  tile["height"] = height;
+  tile["width"] = width;
+  tile["scaleFactors"].append(1);
+
+  Json::Value result;
+  result["@context"] = "http://iiif.io/api/image/2/context.json";
+  result["@id"] = iiifPublicUrl_ + "frames/" + instanceId + "/" + frame;
+  result["profile"] = "http://iiif.io/api/image/2/level0.json";
+  result["protocol"] = "http://iiif.io/api/image";
+  result["width"] = width;
+  result["height"] = height;
+  result["tiles"].append(tile);
+
+  std::string s = result.toStyledString();
+  OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, s.c_str(), s.size(), Orthanc::EnumerationToString(Orthanc::MimeType_Json));
+}
+
+
+static void ServeIIIFFrameImage(OrthancPluginRestOutput* output,
+                               const char* url,
+                               const OrthancPluginHttpRequest* request)
+{
+  const std::string instanceId(request->groups[0]);
+  const std::string frame(request->groups[1]);
+
+  LOG(INFO) << "IIIF: Image API call to JPEG of instance " << instanceId << " at frame " << frame;
+
+  std::map<std::string, std::string> httpHeaders;
+  httpHeaders["Accept"] = Orthanc::EnumerationToString(Orthanc::MimeType_Jpeg);
+
+  std::string jpeg;
+  if (!OrthancPlugins::RestApiGetString(jpeg, "/instances/" + instanceId + "/frames/" + frame + "/preview", httpHeaders, false))
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
+  }
+
+  OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, jpeg.empty() ? NULL : jpeg.c_str(),
+                            jpeg.size(), Orthanc::EnumerationToString(Orthanc::MimeType_Jpeg));
+}
+
+
+void InitializeIIIF(const std::string& iiifPublicUrl)
+{
+  iiifPublicUrl_ = iiifPublicUrl;
+
+  OrthancPlugins::RegisterRestCallback<ServeIIIFTiledImageInfo>("/wsi/iiif/tiles/([0-9a-f-]+)/info.json", true);
+  OrthancPlugins::RegisterRestCallback<ServeIIIFTiledImageTile>("/wsi/iiif/tiles/([0-9a-f-]+)/([0-9a-z,:]+)/([0-9a-z,!:]+)/([0-9,!]+)/([a-z]+)\\.([a-z]+)", true);
+  OrthancPlugins::RegisterRestCallback<ServeIIIFManifest>("/wsi/iiif/([0-9a-f-]+)/manifest.json", true);
+  OrthancPlugins::RegisterRestCallback<ServeIIIFFrameInfo>("/wsi/iiif/frames/([0-9a-f-]+)/([0-9]+)/info.json", true);
+  OrthancPlugins::RegisterRestCallback<ServeIIIFFrameImage>("/wsi/iiif/frames/([0-9a-f-]+)/([0-9]+)/full/max/0/default.jpg", true);
+}
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/IIIF.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ViewerPlugin/IIIF.h	Mon Jul 10 16:23:46 2023 +0200
@@ -0,0 +1,27 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2023 Osimis S.A., Belgium
+ * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include <string>
+
+void InitializeIIIF(const std::string& iiifPublicUrl);
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/OrthancExplorer.js
--- a/ViewerPlugin/OrthancExplorer.js	Mon Jul 10 16:22:14 2023 +0200
+++ b/ViewerPlugin/OrthancExplorer.js	Mon Jul 10 16:23:46 2023 +0200
@@ -23,8 +23,12 @@
 $('#series').live('pagebeforeshow', function() {
   var seriesId = $.mobile.pageData.uuid;
 
+  $('#mirador-button').remove();
   $('#wsi-button').remove();
 
+  $('#series-iiif-button').remove();
+  $('#series-access').listview("refresh");
+
   // Test whether this is a whole-slide image by check the SOP Class
   // UID of one instance of the series
   GetResource('/series/' + seriesId, function(series) {
@@ -51,6 +55,47 @@
         });
 
       }
+
+      if (${SERVE_IIIF}) {
+        var b = $('<a>')
+            .attr('data-role', 'button')
+            .attr('href', '#')
+            .text('Copy link to IIIF manifest');
+
+        var li = $('<li>')
+            .attr('id', 'series-iiif-button')
+            .attr('data-icon', 'gear')
+            .append(b);
+
+        $('#series-access').append(li).listview("refresh");
+
+        b.click(function(e) {
+          if ($.mobile.pageData) {
+            e.preventDefault();
+            var url = new URL('${IIIF_PUBLIC_URL}' + seriesId + '/manifest.json', window.location.href);
+            navigator.clipboard.writeText(url.href);
+            $(e.target).closest('li').buttonMarkup({ icon: 'check' });
+          }
+        });
+      }
+
+      if (${SERVE_MIRADOR}) {
+        var b = $('<a>')
+            .attr('id', 'mirador-button')
+            .attr('data-role', 'button')
+            .attr('href', '#')
+            .attr('data-icon', 'search')
+            .attr('data-theme', 'e')
+            .text('Open IIIF in Mirador')
+            .button();
+
+        b.insertAfter($('#series-info'));
+        b.click(function() {
+          if ($.mobile.pageData) {
+            window.open('../wsi/app/mirador.html?iiif-content=../iiif/' + seriesId + '/manifest.json');
+          }
+        });
+      }
     });
   });
 });
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/OrthancPluginConnection.cpp
--- a/ViewerPlugin/OrthancPluginConnection.cpp	Mon Jul 10 16:22:14 2023 +0200
+++ b/ViewerPlugin/OrthancPluginConnection.cpp	Mon Jul 10 16:23:46 2023 +0200
@@ -20,6 +20,7 @@
  **/
 
 
+#include "../Framework/PrecompiledHeadersWSI.h"
 #include "OrthancPluginConnection.h"
 
 #include "../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h"
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/Plugin.cpp
--- a/ViewerPlugin/Plugin.cpp	Mon Jul 10 16:22:14 2023 +0200
+++ b/ViewerPlugin/Plugin.cpp	Mon Jul 10 16:23:46 2023 +0200
@@ -22,16 +22,14 @@
 
 #include "../Framework/PrecompiledHeadersWSI.h"
 
-#include "../Framework/ImageToolbox.h"
-#include "../Framework/Jpeg2000Reader.h"
 #include "DicomPyramidCache.h"
-#include "OrthancPluginConnection.h"
+#include "IIIF.h"
+#include "RawTile.h"
 
 #include <Compatibility.h>  // For std::unique_ptr
 #include <Logging.h>
+#include <Images/Image.h>
 #include <Images/ImageProcessing.h>
-#include <Images/PngWriter.h>
-#include <MultiThreading/Semaphore.h>
 #include <OrthancException.h>
 #include <SystemToolbox.h>
 
@@ -41,11 +39,6 @@
 
 #include <cassert>
 
-std::unique_ptr<OrthancWSI::OrthancPluginConnection>  orthanc_;
-std::unique_ptr<OrthancWSI::DicomPyramidCache>        cache_;
-std::unique_ptr<Orthanc::Semaphore>                   transcoderSemaphore_;
-
-
 static void AnswerSparseTile(OrthancPluginRestOutput* output,
                              unsigned int tileWidth,
                              unsigned int tileHeight)
@@ -86,7 +79,7 @@
   OrthancPluginLogInfo(OrthancPlugins::GetGlobalContext(), tmp);
   
 
-  OrthancWSI::DicomPyramidCache::Locker locker(*cache_, seriesId);
+  OrthancWSI::DicomPyramidCache::Locker locker(seriesId);
 
   unsigned int totalWidth = locker.GetPyramid().GetLevelWidth(0);
   unsigned int totalHeight = locker.GetPyramid().GetLevelHeight(0);
@@ -155,88 +148,23 @@
   }
 
   // Retrieve the raw tile from the WSI pyramid
-  OrthancWSI::ImageCompression compression;
-  Orthanc::PhotometricInterpretation photometric;
-  Orthanc::PixelFormat format;
-  std::string tile;
-  unsigned int tileWidth, tileHeight;
+  std::unique_ptr<OrthancWSI::RawTile> rawTile;
 
   {
-    OrthancWSI::DicomPyramidCache::Locker locker(*cache_, seriesId);
-
-    format = locker.GetPyramid().GetPixelFormat();
-    tileWidth = locker.GetPyramid().GetTileWidth(level);
-    tileHeight = locker.GetPyramid().GetTileHeight(level);
-    photometric = locker.GetPyramid().GetPhotometricInterpretation();
-
-    if (!locker.GetPyramid().ReadRawTile(tile, compression, 
-                                         static_cast<unsigned int>(level),
-                                         static_cast<unsigned int>(tileX),
-                                         static_cast<unsigned int>(tileY)))
-    {
-      // Handling of missing tile (for sparse tiling): TODO parameter?
-      // AnswerSparseTile(output, tileWidth, tileHeight); return;
-      throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
-    }
-  }
-
-  
-  // Test whether the tile is a JPEG image. In such a case, we can
-  // serve it as such, because any Web browser can handle JPEG
-
-  if (compression == OrthancWSI::ImageCompression_Jpeg)
-  {
-    OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, tile.c_str(), tile.size(), "image/jpeg");
-    return;   // We're done
+    OrthancWSI::DicomPyramidCache::Locker locker(seriesId);
+    rawTile.reset(new OrthancWSI::RawTile(locker.GetPyramid(),
+                                          static_cast<unsigned int>(level),
+                                          static_cast<unsigned int>(tileX),
+                                          static_cast<unsigned int>(tileY)));
   }
 
-
-  // The tile does not come from a DICOM-JPEG instance, we need to
-  // decompress the raw tile
-  std::unique_ptr<Orthanc::ImageAccessor> decoded;
-
-  Orthanc::Semaphore::Locker locker(*transcoderSemaphore_);
-
-  switch (compression)
-  {
-    case OrthancWSI::ImageCompression_Jpeg2000:
-      decoded.reset(new OrthancWSI::Jpeg2000Reader);
-      dynamic_cast<OrthancWSI::Jpeg2000Reader&>(*decoded).ReadFromMemory(tile);
-
-      if (photometric == Orthanc::PhotometricInterpretation_YBR_ICT)
-      {
-        OrthancWSI::ImageToolbox::ConvertJpegYCbCrToRgb(*decoded);
-      }
-      
-      break;
-
-    case OrthancWSI::ImageCompression_None:
-    {
-      unsigned int bpp = Orthanc::GetBytesPerPixel(format);
-      if (bpp * tileWidth * tileHeight != tile.size())
-      {
-        throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
-      }
-
-      decoded.reset(new Orthanc::ImageAccessor);
-      decoded->AssignReadOnly(format, tileWidth, tileHeight, bpp * tileWidth, tile.c_str());
-      break;
-    }
-
-    default:
-      throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
-  }
-
-
-  // This is a lossless frame (coming from a JPEG2000 or uncompressed
-  // DICOM instance), serve it as a PNG image so as to prevent lossy
-  // compression
-
-  std::string png;
-  Orthanc::PngWriter writer;
-  Orthanc::IImageWriter::WriteToMemory(writer, png, *decoded);
-
-  OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, png.c_str(), png.size(), "image/png");
+  /**
+   * In the case the DICOM file doesn't use the JPEG transfer syntax,
+   * transfer the tile (which is presumably lossless) as a PNG image
+   * so as to prevent lossy compression. Don't call "rawTile" while
+   * the Locker is around, as "Answer()" can be a costly operation.
+   **/
+  rawTile->Answer(output, Orthanc::MimeType_Png);
 }
 
 
@@ -251,7 +179,7 @@
     sprintf(tmp, "New instance has been added to series %s, invalidating it", resourceId);
     OrthancPluginLogInfo(OrthancPlugins::GetGlobalContext(), tmp);
 
-    cache_->Invalidate(resourceId);
+    OrthancWSI::DicomPyramidCache::GetInstance().Invalidate(resourceId);
   }
 
   return OrthancPluginErrorCode_Success;
@@ -288,6 +216,11 @@
     resource = Orthanc::EmbeddedResources::OPENLAYERS_CSS;
     mime = "text/css";
   }
+  else if (f == "mirador.html")
+  {
+    resource = Orthanc::EmbeddedResources::MIRADOR_HTML;
+    mime = "text/html";
+  }
   else
   {
     throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
@@ -300,7 +233,6 @@
 }
 
 
-
 extern "C"
 {
   ORTHANC_PLUGINS_API int32_t OrthancPluginInitialize(OrthancPluginContext* context)
@@ -337,7 +269,7 @@
     // hardware threads (e.g. number of CPUs or cores or
     // hyperthreading units)
     unsigned int threads = Orthanc::SystemToolbox::GetHardwareConcurrency();
-    transcoderSemaphore_.reset(new Orthanc::Semaphore(threads));
+    OrthancWSI::RawTile::InitializeTranscoderSemaphore(threads);
 
     char info[1024];
     sprintf(info, "The whole-slide imaging plugin will use at most %u threads to transcode the tiles", threads);
@@ -345,8 +277,7 @@
 
     OrthancPluginSetDescription(context, "Provides a Web viewer of whole-slide microscopic images within Orthanc.");
 
-    orthanc_.reset(new OrthancWSI::OrthancPluginConnection);
-    cache_.reset(new OrthancWSI::DicomPyramidCache(*orthanc_, 10 /* Number of pyramids to be cached - TODO parameter */));
+    OrthancWSI::DicomPyramidCache::InitializeInstance(10 /* Number of pyramids to be cached - TODO parameter */);
 
     OrthancPluginRegisterOnChangeCallback(OrthancPlugins::GetGlobalContext(), OnChangeCallback);
 
@@ -357,10 +288,49 @@
     OrthancPlugins::RegisterRestCallback<ServePyramid>("/wsi/pyramids/([0-9a-f-]+)", true);
     OrthancPlugins::RegisterRestCallback<ServeTile>("/wsi/tiles/([0-9a-f-]+)/([0-9-]+)/([0-9-]+)/([0-9-]+)", true);
 
-    // Extend the default Orthanc Explorer with custom JavaScript for WSI
-    std::string explorer;
-    Orthanc::EmbeddedResources::GetFileResource(explorer, Orthanc::EmbeddedResources::ORTHANC_EXPLORER);
-    OrthancPluginExtendOrthancExplorer(OrthancPlugins::GetGlobalContext(), explorer.c_str());
+    bool serveMirador;
+    bool serveIIIF = true;  // TODO => CONFIG
+    std::string iiifPublicUrl;
+
+    if (serveIIIF)
+    {
+      // TODO => CONFIG
+      iiifPublicUrl = "http://localhost:8042/wsi/iiif";
+
+      if (iiifPublicUrl.empty() ||
+          iiifPublicUrl[iiifPublicUrl.size() - 1] != '/')
+      {
+        iiifPublicUrl += "/";
+      }
+
+      InitializeIIIF(iiifPublicUrl);
+
+      serveMirador = true;  // TODO => CONFIG
+
+      if (serveMirador)
+      {
+        OrthancPlugins::RegisterRestCallback<ServeFile>("/wsi/app/(mirador.html)", true);
+      }
+    }
+    else
+    {
+      serveMirador = false;
+    }
+
+    {
+      // Extend the default Orthanc Explorer with custom JavaScript for WSI
+
+      std::string explorer;
+      Orthanc::EmbeddedResources::GetFileResource(explorer, Orthanc::EmbeddedResources::ORTHANC_EXPLORER);
+
+      std::map<std::string, std::string> dictionary;
+      dictionary["SERVE_IIIF"] = (serveIIIF ? "true" : "false");
+      dictionary["SERVE_MIRADOR"] = (serveMirador ? "true" : "false");
+      dictionary["IIIF_PUBLIC_URL"] = iiifPublicUrl;
+      explorer = Orthanc::Toolbox::SubstituteVariables(explorer, dictionary);
+
+      OrthancPluginExtendOrthancExplorer(OrthancPlugins::GetGlobalContext(), explorer.c_str());
+    }
 
     return 0;
   }
@@ -368,9 +338,8 @@
 
   ORTHANC_PLUGINS_API void OrthancPluginFinalize()
   {
-    cache_.reset(NULL);
-    orthanc_.reset(NULL);
-    transcoderSemaphore_.reset(NULL);
+    OrthancWSI::DicomPyramidCache::FinalizeInstance();
+    OrthancWSI::RawTile::FinalizeTranscoderSemaphore();
   }
 
 
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/RawTile.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ViewerPlugin/RawTile.cpp	Mon Jul 10 16:23:46 2023 +0200
@@ -0,0 +1,189 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2023 Osimis S.A., Belgium
+ * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "../Framework/PrecompiledHeadersWSI.h"
+#include "RawTile.h"
+
+#include "../Framework/ImageToolbox.h"
+#include "../Framework/Jpeg2000Reader.h"
+#include "../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h"
+
+#include <Compatibility.h>  // For std::unique_ptr
+#include <Images/JpegReader.h>
+#include <Images/JpegWriter.h>
+#include <Images/PngWriter.h>
+#include <MultiThreading/Semaphore.h>
+#include <OrthancException.h>
+
+
+static std::unique_ptr<Orthanc::Semaphore>  transcoderSemaphore_;
+
+namespace OrthancWSI
+{
+  Orthanc::ImageAccessor* RawTile::DecodeInternal()
+  {
+    switch (compression_)
+    {
+      case ImageCompression_Jpeg:
+      {
+        std::unique_ptr<Orthanc::JpegReader> decoded(new Orthanc::JpegReader);
+        decoded->ReadFromMemory(tile_);
+        return decoded.release();
+      }
+
+      case ImageCompression_Jpeg2000:
+      {
+        std::unique_ptr<Jpeg2000Reader> decoded(new Jpeg2000Reader);
+        decoded->ReadFromMemory(tile_);
+
+        if (photometric_ == Orthanc::PhotometricInterpretation_YBR_ICT)
+        {
+          ImageToolbox::ConvertJpegYCbCrToRgb(*decoded);
+        }
+
+        return decoded.release();
+      }
+
+      case ImageCompression_None:
+      {
+        unsigned int bpp = Orthanc::GetBytesPerPixel(format_);
+        if (bpp * tileWidth_ * tileHeight_ != tile_.size())
+        {
+          throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+        }
+
+        std::unique_ptr<Orthanc::ImageAccessor> decoded(new Orthanc::ImageAccessor);
+        decoded->AssignReadOnly(format_, tileWidth_, tileHeight_, bpp * tileWidth_, tile_.c_str());
+
+        return decoded.release();
+      }
+
+      default:
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
+    }
+  }
+
+
+  void RawTile::EncodeInternal(std::string& encoded,
+                               const Orthanc::ImageAccessor& decoded,
+                               Orthanc::MimeType transcodingType)
+  {
+    switch (transcodingType)
+    {
+      case Orthanc::MimeType_Png:
+      {
+        Orthanc::PngWriter writer;
+        Orthanc::IImageWriter::WriteToMemory(writer, encoded, decoded);
+        break;
+      }
+
+      case Orthanc::MimeType_Jpeg:
+      {
+        Orthanc::JpegWriter writer;
+        Orthanc::IImageWriter::WriteToMemory(writer, encoded, decoded);
+        break;
+      }
+
+      default:
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
+    }
+  }
+
+
+  RawTile::RawTile(ITiledPyramid& pyramid,
+                   unsigned int level,
+                   unsigned int tileX,
+                   unsigned int tileY) :
+    format_(pyramid.GetPixelFormat()),
+    tileWidth_(pyramid.GetTileWidth(level)),
+    tileHeight_(pyramid.GetTileHeight(level)),
+    photometric_(pyramid.GetPhotometricInterpretation())
+  {
+    if (!pyramid.ReadRawTile(tile_, compression_, level, tileX, tileY))
+    {
+      // Handling of missing tile (for sparse tiling): TODO parameter?
+      // AnswerSparseTile(output, tileWidth, tileHeight); return;
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
+    }
+  }
+
+
+  void RawTile::Answer(OrthancPluginRestOutput* output,
+                       Orthanc::MimeType transcodingType)
+  {
+    if (compression_ == ImageCompression_Jpeg)
+    {
+      // The tile is already a JPEG image. In such a case, we can
+      // serve it as such, because any Web browser can handle JPEG.
+      OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, tile_.c_str(),
+                                tile_.size(), Orthanc::EnumerationToString(Orthanc::MimeType_Jpeg));
+    }
+    else
+    {
+      // This is a lossless frame (coming from a JPEG2000 or an
+      // uncompressed DICOM instance), which is not a DICOM-JPEG
+      // instance. We need to decompress the raw tile, then transcode
+      // it to the PNG/JPEG, depending on the "transcodingType".
+
+      std::string transcoded;
+
+      {
+        // The semaphore is used to throttle the number of simultaneous computations
+        Orthanc::Semaphore::Locker locker(*transcoderSemaphore_);
+
+        std::unique_ptr<Orthanc::ImageAccessor> decoded(DecodeInternal());
+        EncodeInternal(transcoded, *decoded, transcodingType);
+      }
+
+      OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, transcoded.c_str(),
+                                transcoded.size(), Orthanc::EnumerationToString(transcodingType));
+    }
+  }
+
+
+  Orthanc::ImageAccessor* RawTile::Decode()
+  {
+    Orthanc::Semaphore::Locker locker(*transcoderSemaphore_);
+    return DecodeInternal();
+  }
+
+
+  void RawTile::Encode(std::string& encoded,
+                       const Orthanc::ImageAccessor& decoded,
+                       Orthanc::MimeType transcodingType)
+  {
+    Orthanc::Semaphore::Locker locker(*transcoderSemaphore_);
+    EncodeInternal(encoded, decoded, transcodingType);
+  }
+
+
+  void RawTile::InitializeTranscoderSemaphore(unsigned int maxThreads)
+  {
+    transcoderSemaphore_.reset(new Orthanc::Semaphore(maxThreads));
+  }
+
+
+  void RawTile::FinalizeTranscoderSemaphore()
+  {
+    transcoderSemaphore_.reset(NULL);
+  }
+}
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/RawTile.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ViewerPlugin/RawTile.h	Mon Jul 10 16:23:46 2023 +0200
@@ -0,0 +1,70 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2023 Osimis S.A., Belgium
+ * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include "../Framework/Enumerations.h"
+#include "../Framework/Inputs/ITiledPyramid.h"
+
+#include <orthanc/OrthancCPlugin.h>
+
+
+namespace OrthancWSI
+{
+  class RawTile : public boost::noncopyable
+  {
+  private:
+    Orthanc::PixelFormat               format_;
+    unsigned int                       tileWidth_;
+    unsigned int                       tileHeight_;
+    Orthanc::PhotometricInterpretation photometric_;
+    std::string                        tile_;
+    ImageCompression                   compression_;
+
+    Orthanc::ImageAccessor* DecodeInternal();
+
+    static void EncodeInternal(std::string& encoded,
+                               const Orthanc::ImageAccessor& decoded,
+                               Orthanc::MimeType transcodingType);
+
+  public:
+    RawTile(ITiledPyramid& pyramid,
+            unsigned int level,
+            unsigned int tileX,
+            unsigned int tileY);
+
+    void Answer(OrthancPluginRestOutput* output,
+                Orthanc::MimeType transcodingType);
+
+    Orthanc::ImageAccessor* Decode();
+
+    static void Encode(std::string& encoded,
+                       const Orthanc::ImageAccessor& decoded,
+                       Orthanc::MimeType transcodingType);
+
+    // This semaphore is used to implement throttling for the
+    // decoding/encoding of tiles
+    static void InitializeTranscoderSemaphore(unsigned int maxThreads);
+
+    static void FinalizeTranscoderSemaphore();
+  };
+}
diff -r a6e4834ac141 -r 30fb01ce97a3 ViewerPlugin/mirador.html
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ViewerPlugin/mirador.html	Mon Jul 10 16:23:46 2023 +0200
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <meta name="theme-color" content="#000000">
+    <title>Mirador</title>
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500">
+    <!--link rel="shortcut icon" type="image/svg" href="/img/mirador-logo.svg"/-->
+  </head>
+  <body>
+    <div id="mirador" style="position: absolute; top: 0; bottom: 0; left: 0; right: 0;"></div>
+    <script>document.write("<script type='text/javascript' src='https://unpkg.com/mirador@latest/dist/mirador.min.js'><\/script>");</script>
+    <script type="text/javascript">
+      var params = new URL(document.location).searchParams;
+      var manifest = params.get('iiif-content') || params.get('manifest');
+      var windows = [];
+      if (manifest) {
+        windows.push({ manifestId: manifest});
+      }
+      var miradorInstance = Mirador.viewer({
+        id: 'mirador',
+        windows: windows,
+      });
+    </script>
+  </body>
+</html>