# Main CMakeLists.txt to build the OpenJPEG project using CMake (www.cmake.org)
# Written by Mathieu Malaterre

# This CMake project will by default create a library called openjpeg
# But if you want to use this project within your own (CMake) project
# you will eventually like to prefix the library to avoid linking confusion
# For this purpose you can define a CMake var: OPENJPEG_NAMESPACE to whatever you like
# e.g.:
# SET(OPENJPEG_NAMESPACE "GDCMOPENJPEG")
CMAKE_MINIMUM_REQUIRED(VERSION 2.4)

IF(NOT OPENJPEG_NAMESPACE)
  SET(OPENJPEG_NAMESPACE "OPENJPEG")
  SET(OPENJPEG_STANDALONE 1)
ENDIF(NOT OPENJPEG_NAMESPACE)
# In all cases:
STRING(TOLOWER ${OPENJPEG_NAMESPACE} OPENJPEG_LIBRARY_NAME)

IF(COMMAND CMAKE_POLICY)
  CMAKE_POLICY(SET CMP0003 NEW)
ENDIF(COMMAND CMAKE_POLICY)

PROJECT(${OPENJPEG_NAMESPACE} C)

# Do full dependency headers.
INCLUDE_REGULAR_EXPRESSION("^.*$")

#-----------------------------------------------------------------------------
# OPENJPEG version number, useful for packaging and doxygen doc:
SET(OPENJPEG_VERSION_MAJOR 2)
SET(OPENJPEG_VERSION_MINOR 0)
SET(OPENJPEG_VERSION_BUILD 0)
SET(OPENJPEG_VERSION
  "${OPENJPEG_VERSION_MAJOR}.${OPENJPEG_VERSION_MINOR}.${OPENJPEG_VERSION_BUILD}")

# This setting of SOVERSION assumes that any API change
# will increment either the minor or major version number of openjpeg
SET(OPENJPEG_LIBRARY_PROPERTIES
  VERSION   "${OPENJPEG_VERSION_MAJOR}.${OPENJPEG_VERSION_MINOR}.${OPENJPEG_VERSION_BUILD}"
  SOVERSION "${OPENJPEG_VERSION_MAJOR}.${OPENJPEG_VERSION_MINOR}"
)

#-----------------------------------------------------------------------------
# Test for some required system information.
INCLUDE (${CMAKE_ROOT}/Modules/CMakeBackwardCompatibilityC.cmake)

#-----------------------------------------------------------------------------
# Setup file for setting custom ctest vars
CONFIGURE_FILE(
  ${CMAKE_CURRENT_SOURCE_DIR}/CMake/CTestCustom.cmake.in
  ${CMAKE_CURRENT_BINARY_DIR}/CTestCustom.cmake
  @ONLY
  )

#-----------------------------------------------------------------------------
# OpenJPEG build configuration options.
OPTION(BUILD_SHARED_LIBS "Build OpenJPEG with shared libraries." OFF)
OPTION(ENABLE_PROFILING "Enable profiling for the library" OFF)

#-----------------------------------------------------------------------------
SET (EXECUTABLE_OUTPUT_PATH ${OPENJPEG_BINARY_DIR}/bin CACHE PATH "Single output directory for building all executables.")
SET (LIBRARY_OUTPUT_PATH ${OPENJPEG_BINARY_DIR}/bin CACHE PATH "Single output directory for building all libraries.")
MARK_AS_ADVANCED(LIBRARY_OUTPUT_PATH EXECUTABLE_OUTPUT_PATH)


#-----------------------------------------------------------------------------
# For the codec...
OPTION(BUILD_EXAMPLES "Build the Examples (codec...)." OFF)


# configure name mangling to allow multiple libraries to coexist
# peacefully
IF(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/openjpeg_mangle.h.in)
SET(MANGLE_PREFIX ${OPENJPEG_LIBRARY_NAME})
CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/openjpeg_mangle.h.in
               ${CMAKE_CURRENT_BINARY_DIR}/openjpeg_mangle.h
               @ONLY IMMEDIATE)
ENDIF(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/openjpeg_mangle.h.in)

#-----------------------------------------------------------------------------
# Configure files with settings for use by the build.
CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/opj_configure.h.in 
               ${CMAKE_CURRENT_BINARY_DIR}/opj_configure.h)


#-----------------------------------------------------------------------------
# Always build the library
INCLUDE_DIRECTORIES(BEFORE ${CMAKE_CURRENT_BINARY_DIR})
SUBDIRS(
  libopenjpeg
  # mj2
  #j2kviewer/src
  )
IF(BUILD_EXAMPLES)
  SUBDIRS(codec)
ENDIF(BUILD_EXAMPLES)

#IF(NOT UNIX)
#SUBDIRS(
#  jpwl
#  jp3d
#  indexer_JPIP
#  )
#ENDIF(NOT UNIX)

#-----------------------------------------------------------------------------
# For the documentation
OPTION(BUILD_DOCUMENTATION "Build the doxygen documentation" OFF)
IF(BUILD_DOCUMENTATION)
  SUBDIRS(doc)
ENDIF(BUILD_DOCUMENTATION)

#-----------------------------------------------------------------------------
# For openjpeg team if they ever want Dart+CMake
OPTION(BUILD_TESTING "Build the tests." OFF)
IF(BUILD_TESTING)
  ENABLE_TESTING()
  INCLUDE(CTest)
ENDIF(BUILD_TESTING)

IF(BUILD_TESTING)
  SUBDIRS(
    test_V2_tile_handling
    test_Free_image_V2_tile_handling
  )
ENDIF(BUILD_TESTING)

# Adding test with dataset from:
# http://www.crc.ricoh.com/~gormish/jpeg2000conformance/
# http://www.jpeg.org/jpeg2000guide/testimages/testimages.html

#-----------------------------------------------------------------------------
# Adding JPEG2000_CONFORMANCE_DATA_ROOT
FIND_PATH(JPEG2000_CONFORMANCE_DATA_ROOT testimages.html
  ${OPENJPEG_SOURCE_DIR}/../jpeg2000testimages
  $ENV{JPEG2000_CONFORMANCE_DATA_ROOT}
)

#-----------------------------------------------------------------------------
# Compiler specific flags:
IF(CMAKE_COMPILER_IS_GNUCC)
  # For all builds, make sure openjpeg is std99 compliant:
  # SET(CMAKE_C_FLAGS "-Wall -std=c99 ${CMAKE_C_FLAGS}") # FIXME: this setting prevented us from setting a coverage build.
  # Do not use ffast-math for all build, it would produce incorrect results, only set for release:
  SET(CMAKE_C_FLAGS_RELEASE "-ffast-math ${CMAKE_C_FLAGS_RELEASE}")
ENDIF(CMAKE_COMPILER_IS_GNUCC)