test(WASI): Add mean-squares-versor-registration example

Based on the ImageRegistration8.cxx ITK/Examples/ ITK Software Guide
example.

examples/inputs-outputs/CMakeLists.txt

@@ -28,4 +28,4 @@ find_package(ITK REQUIRED
 include(${ITK_USE_FILE})
 
 add_executable(inputs-outputs inputs-outputs.cxx)
-target_link_libraries(inputs-outputs PUBLIC ${ITK_LIBRARIES})
+target_link_libraries(inputs-outputs PUBLIC ${ITK_LIBRARIES})

examples/mean-squares-versor-registration/CMakeLists.txt

@@ -0,0 +1,68 @@
+cmake_minimum_required(VERSION 3.16)
+project(mean-squares-versor-registration)
+
+# Use C++17 or newer with itk-wasm
+set(CMAKE_CXX_STANDARD 17)
+
+# We always want to build against the WebAssemblyInterface module.
+set(itk_components
+  WebAssemblyInterface
+  ITKCommon
+  ITKImageFilterBase
+  ITKImageGrid
+  ITKImageIntensity
+  ITKMetricsv4
+  ITKOptimizersv4
+  ITKRegistrationCommon
+  ITKRegistrationMethodsv4
+  ITKTransform
+  )
+# WASI or native binaries
+if (NOT EMSCRIPTEN)
+  # WebAssemblyInterface supports the .iwi, .iwi.cbor itk-wasm format.
+  # We can list other ITK IO modules to build against to support other
+  # formats when building native executable or WASI WebAssembly.
+  # However, this will bloat the size of the WASI WebAssembly binary, so
+  # add them judiciously.
+  set(itk_components
+    ${itk_components}
+    ITKIOMeta
+    # ITKImageIO # Adds support for all available image IO modules
+    )
+endif()
+
+find_package(ITK REQUIRED
+  COMPONENTS ${itk_components}
+  )
+include(${ITK_USE_FILE})
+
+# This is modified ITK/Examples/RegistrationITKv4/ImageRegistration8.cxx
+add_executable(mean-squares-versor-registration
+  mean-squares-versor-registration.cxx)
+target_link_libraries(mean-squares-versor-registration
+  PUBLIC ${ITK_LIBRARIES})
+
+
+enable_testing()
+
+set(fixed_image ${CMAKE_CURRENT_BINARY_DIR}/brainweb1e1a10f20.mha)
+if(NOT EXISTS ${fixed_image})
+  message(STATUS "Downloading test fixed image...")
+  file(DOWNLOAD "https://w3s.link/ipfs/bafybeigdv4jgy3zt5d7vdzq5qzmpofh6fubhnp5qqgkfvr25lozgskzzcq/brainweb1e1a10f20.mha"
+    ${fixed_image}
+    )
+endif()
+set(moving_image ${CMAKE_CURRENT_BINARY_DIR}/brainweb1e1a10f20Rot10Tx15.mha)
+if(NOT EXISTS ${moving_image})
+  message(STATUS "Downloading test moving image...")
+  file(DOWNLOAD
+    "https://w3s.link/ipfs/bafybeialjushstijsk7rk45sm2i5sfxyc7uqmtwpeabakqrcrokhlx34tu/brainweb1e1a10f20Rot10Tx15.mha"
+    ${moving_image}
+    )
+endif()
+add_test(NAME mean-squares-versor-registration-test
+  COMMAND mean-squares-versor-registration
+    ${fixed_image}
+    ${moving_image}
+    ${CMAKE_CURRENT_BINARY_DIR}/output_image.mha
+  )