# Copyright (c) 2022, ETH Zurich and UNC Chapel Hill.
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# Author: Johannes L. Schoenberger (jsch-at-demuc-dot-de)

# Find package module for FreeImage library.
#
# The following variables are set by this module:
#
#   FREEIMAGE_FOUND: TRUE if FreeImage is found.
#   FREEIMAGE_INCLUDE_DIRS: Include directories for FreeImage.
#   FREEIMAGE_LIBRARIES: Libraries required to link FreeImage.
#
# The following variables control the behavior of this module:
#
# FREEIMAGE_INCLUDE_DIR_HINTS: List of additional directories in which to
#                              search for FreeImage includes.
# FREEIMAGE_LIBRARY_DIR_HINTS: List of additional directories in which to
#                              search for FreeImage libraries.

set(FREEIMAGE_INCLUDE_DIR_HINTS "" CACHE PATH "FreeImage include directory")
set(FREEIMAGE_LIBRARY_DIR_HINTS "" CACHE PATH "FreeImage library directory")

unset(FREEIMAGE_FOUND)
unset(FREEIMAGE_INCLUDE_DIRS)
unset(FREEIMAGE_LIBRARIES)

list(APPEND FREEIMAGE_CHECK_INCLUDE_DIRS
    ${FREEIMAGE_INCLUDE_DIR_HINTS}
    /usr/include
    /usr/local/include
    /opt/include
    /opt/local/include
)

list(APPEND FREEIMAGE_CHECK_LIBRARY_DIRS
    ${FREEIMAGE_LIBRARY_DIR_HINTS}
    /usr/lib
    /usr/local/lib
    /opt/lib
    /opt/local/lib
)

find_path(FREEIMAGE_INCLUDE_DIRS
    NAMES
    FreeImage.h
    PATHS
    ${FREEIMAGE_CHECK_INCLUDE_DIRS})
find_library(FREEIMAGE_LIBRARIES
    NAMES
    freeimage
    PATHS
    ${FREEIMAGE_CHECK_LIBRARY_DIRS})

if(FREEIMAGE_INCLUDE_DIRS AND FREEIMAGE_LIBRARIES)
    set(FREEIMAGE_FOUND TRUE)
endif()

if(FREEIMAGE_FOUND)
    message(STATUS "Found FreeImage")
    message(STATUS "  Includes : ${FREEIMAGE_INCLUDE_DIRS}")
    message(STATUS "  Libraries : ${FREEIMAGE_LIBRARIES}")
else()
    if(FreeImage_FIND_REQUIRED)
        message(FATAL_ERROR "Could not find FreeImage")
    endif()
endif()