# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

#.rst:
# FindSDL2_image
# -------------
#
# Locate SDL2_image library
#
# This module defines:
#
# ::
#
# SDL2_IMAGE_LIBRARIES, the name of the library to link against
# SDL2_IMAGE_INCLUDE_DIRS, where to find the headers
# SDL2_IMAGE_FOUND, if false, do not try to link against
# SDL2_IMAGE_VERSION_STRING - human-readable string containing the
# version of SDL_image
#
#
#
# For backward compatibility the following variables are also set:
#
# ::
#
# SDL2IMAGE_LIBRARY (same value as SDL_IMAGE_LIBRARIES)
# SDL2IMAGE_INCLUDE_DIR (same value as SDL_IMAGE_INCLUDE_DIRS)
# SDL2IMAGE_FOUND (same value as SDL_IMAGE_FOUND)
#
#
#
# $SDL2DIR is an environment variable that would correspond to the
# ./configure --prefix=$SDL2DIR used in building SDL.
#
# Created by Eric Wing. This was influenced by the FindSDL.cmake
# module, but with modifications to recognize OS X frameworks and
# additional Unix paths (FreeBSD, etc).

if(NOT SDL2_IMAGE_INCLUDE_DIR AND SDL2IMAGE_INCLUDE_DIR)
  set(SDL2_IMAGE_INCLUDE_DIR ${SDL2IMAGE_INCLUDE_DIR} CACHE PATH "directory cache entry initialized from old variable name")
endif()
find_path(SDL2_IMAGE_INCLUDE_DIR SDL_image.h
  HINTS
    ${SDL2IMAGEDIR}
    ENV SDL2IMAGEDIR
    ENV SDL2DIR
    ${SDL2_DIR}
  PATH_SUFFIXES SDL2
                # path suffixes to search inside ENV{SDL2DIR}
                include/SDL2 include
)

if(CMAKE_SIZEOF_VOID_P EQUAL 8)
  set(VC_LIB_PATH_SUFFIX lib/x64)
else()
  set(VC_LIB_PATH_SUFFIX lib/x86)
endif()

if(NOT SDL2_IMAGE_LIBRARY AND SDL2IMAGE_LIBRARY)
  set(SDL2_IMAGE_LIBRARY ${SDL2IMAGE_LIBRARY} CACHE FILEPATH "file cache entry initialized from old variable name")
endif()
find_library(SDL2_IMAGE_LIBRARY
  NAMES SDL2_image
  HINTS
    ${SDL2IMAGEDIR}
    ENV SDL2IMAGEDIR
    ENV SDL2DIR
    ${SDL2_DIR}
  PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX}
)

if(SDL2_IMAGE_INCLUDE_DIR AND EXISTS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h")
  file(STRINGS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h" SDL2_IMAGE_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_IMAGE_MAJOR_VERSION[ \t]+[0-9]+$")
  file(STRINGS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h" SDL2_IMAGE_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_IMAGE_MINOR_VERSION[ \t]+[0-9]+$")
  file(STRINGS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h" SDL2_IMAGE_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_IMAGE_PATCHLEVEL[ \t]+[0-9]+$")
  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_IMAGE_VERSION_MAJOR "${SDL_IMAGE_VERSION_MAJOR_LINE}")
  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_IMAGE_VERSION_MINOR "${SDL_IMAGE_VERSION_MINOR_LINE}")
  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_IMAGE_VERSION_PATCH "${SDL_IMAGE_VERSION_PATCH_LINE}")
  set(SDL2_IMAGE_VERSION_STRING ${SDL2_IMAGE_VERSION_MAJOR}.${SDL2_IMAGE_VERSION_MINOR}.${SDL2_IMAGE_VERSION_PATCH})
  unset(SDL2_IMAGE_VERSION_MAJOR_LINE)
  unset(SDL2_IMAGE_VERSION_MINOR_LINE)
  unset(SDL2_IMAGE_VERSION_PATCH_LINE)
  unset(SDL2_IMAGE_VERSION_MAJOR)
  unset(SDL2_IMAGE_VERSION_MINOR)
  unset(SDL2_IMAGE_VERSION_PATCH)
endif()

set(SDL2_IMAGE_LIBRARIES ${SDL2_IMAGE_LIBRARY})
set(SDL2_IMAGE_INCLUDE_DIRS ${SDL2_IMAGE_INCLUDE_DIR})

FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2_image
                                  REQUIRED_VARS SDL2_IMAGE_LIBRARIES SDL2_IMAGE_INCLUDE_DIRS
                                  VERSION_VAR SDL2_IMAGE_VERSION_STRING)

# for backward compatibility
set(SDL2IMAGE_LIBRARY ${SDL2_IMAGE_LIBRARIES})
set(SDL2IMAGE_INCLUDE_DIR ${SDL2_IMAGE_INCLUDE_DIRS})
set(SDL2IMAGE_FOUND ${SDL2_IMAGE_FOUND})

mark_as_advanced(SDL2_IMAGE_LIBRARY SDL2_IMAGE_INCLUDE_DIR)