cmake_minimum_required(VERSION 2.8.3)

project(OrthancStone)

set(ORTHANC_STONE_INSTALL_PREFIX "${CMAKE_SOURCE_DIR}/../../../wasm-binaries/StoneWebViewer" CACHE PATH "Where to put the WebAssembly binaries")


# Configuration of the Emscripten compiler for WebAssembly target
# ---------------------------------------------------------------
set(USE_WASM ON CACHE BOOL "")

set(EMSCRIPTEN_SET_LLVM_WASM_BACKEND ON CACHE BOOL "")

set(WASM_FLAGS "${WASM_FLAGS} -s WASM=1 -s FETCH=1")
if (CMAKE_BUILD_TYPE STREQUAL "Debug")
  set(WASM_FLAGS "${WASM_FLAGS} -s SAFE_HEAP=1")
endif()

set(WASM_LINKER_FLAGS "${WASM_LINKER_FLAGS} -s EXTRA_EXPORTED_RUNTIME_METHODS='[\"ccall\", \"cwrap\"]'")
set(WASM_LINKER_FLAGS "${WASM_LINKER_FLAGS} -s ERROR_ON_UNDEFINED_SYMBOLS=1")
set(WASM_LINKER_FLAGS "${WASM_LINKER_FLAGS} -s ASSERTIONS=1 -s DISABLE_EXCEPTION_CATCHING=0")
set(WASM_LINKER_FLAGS "${WASM_LINKER_FLAGS} -s ALLOW_MEMORY_GROWTH=1 -s TOTAL_MEMORY=268435456")  # 256MB + resize
set(WASM_LINKER_FLAGS "${WASM_LINKER_FLAGS} -s DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR=1")
add_definitions(
  -DDISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR=1
)


# Stone of Orthanc configuration
# ---------------------------------------------------------------
set(ALLOW_DOWNLOADS ON)

include(${CMAKE_SOURCE_DIR}/../../../OrthancStone/Resources/CMake/OrthancStoneParameters.cmake)

SET(ENABLE_DCMTK ON)
SET(ENABLE_DCMTK_NETWORKING OFF)
SET(ENABLE_DCMTK_TRANSCODING OFF)
SET(ENABLE_GOOGLE_TEST OFF)
SET(ENABLE_LOCALE ON)  # Necessary for text rendering
SET(ENABLE_WASM ON)
SET(ORTHANC_SANDBOXED ON)

# this will set up the build system for Stone of Orthanc and will
# populate the ORTHANC_STONE_SOURCES CMake variable
include(${ORTHANC_STONE_ROOT}/Resources/CMake/OrthancStoneConfiguration.cmake)

include_directories(
  ${CMAKE_SOURCE_DIR}/../../../OrthancStone/Sources/
  )

if (CMAKE_BUILD_TYPE MATCHES Debug)
  # specific flags go here
elseif (CMAKE_BUILD_TYPE MATCHES RelWithDebInfo)
  # specific flags go here
elseif (CMAKE_BUILD_TYPE MATCHES Release)
  # specific flags go here
else()
  message(FATAL_ERROR "CMAKE_BUILD_TYPE must match either Debug, RelWithDebInfo or Release" )
endif()

################################################################################


# Create the wrapper to call C++ from JavaScript
# ---------------------------------------------------------------

set(LIBCLANG "libclang-4.0.so.1" CACHE PATH "Version of clang to generate the code model")
set(STONE_WRAPPER ${CMAKE_CURRENT_BINARY_DIR}/stone.js)

add_custom_command(
  COMMAND
  ${PYTHON_EXECUTABLE} ${CMAKE_SOURCE_DIR}/ParseWebAssemblyExports.py --libclang=${LIBCLANG} ${CMAKE_SOURCE_DIR}/StoneWebViewer.cpp > ${STONE_WRAPPER}
  DEPENDS
  ${CMAKE_SOURCE_DIR}/StoneWebViewer.cpp
  ${CMAKE_SOURCE_DIR}/ParseWebAssemblyExports.py
  OUTPUT
  ${STONE_WRAPPER}
  )

add_custom_target(StoneWrapper
  DEPENDS
  ${STONE_WRAPPER}
  )  


# Define the WASM module
# ---------------------------------------------------------------

add_executable(StoneWebViewer
  ${ORTHANC_STONE_SOURCES}
  ${AUTOGENERATED_SOURCES}
  StoneWebViewer.cpp
  )

set_target_properties(StoneWebViewer
  PROPERTIES
  COMPILE_FLAGS "${WASM_FLAGS}"
  LINK_FLAGS "${WASM_LINKER_FLAGS}"
  )

# Make sure to have the wrapper generated
add_dependencies(StoneWebViewer StoneWrapper)


# Declare installation files for the module
# ---------------------------------------------------------------

install(
  TARGETS StoneWebViewer
  RUNTIME DESTINATION ${ORTHANC_STONE_INSTALL_PREFIX}
  )


# Declare installation files for the companion files (web scaffolding)
# please note that ${CMAKE_CURRENT_BINARY_DIR}/StoneWebViewer.js
# (the generated JS loader for the WASM module) is handled by the `install`
# section above: it is considered to be the binary output of 
# the linker.
# ---------------------------------------------------------------
install(
  FILES
  ${CMAKE_CURRENT_BINARY_DIR}/StoneWebViewer.wasm
  ${CMAKE_SOURCE_DIR}/../WebApplication/app.css
  ${CMAKE_SOURCE_DIR}/../WebApplication/app.js
  ${CMAKE_SOURCE_DIR}/../WebApplication/index.html
  ${STONE_WRAPPER}
  DESTINATION ${ORTHANC_STONE_INSTALL_PREFIX}
  )

install(
  FILES
  ${CMAKE_SOURCE_DIR}/../WebApplication/img/grid1x1.png
  ${CMAKE_SOURCE_DIR}/../WebApplication/img/grid1x2.png
  ${CMAKE_SOURCE_DIR}/../WebApplication/img/grid2x1.png
  ${CMAKE_SOURCE_DIR}/../WebApplication/img/grid2x2.png
  ${CMAKE_SOURCE_DIR}/../WebApplication/img/loading.gif
  DESTINATION ${ORTHANC_STONE_INSTALL_PREFIX}/img
  )