# encoding: UTF-8
require 'ffi'
require 'rbconfig'

module FreeImage
  def self.msvc?
    # If this is windows we assume FreeImage was compiled with
    # MSVC since that is the binary distibution provided on
    # the web site.  If you have compiled FreeImage yourself
    # on windows using another compiler, set this to false.
    #
    # This is important because FreeImage defines different
    # type sizes for MSVC - see types/ffi.rb
    FFI::Platform.windows?
  end

  def self.search_paths
    @search_paths ||= begin
      if ENV['FREE_IMAGE_LIBRARY_PATH']
        [ ENV['FREE_IMAGE_LIBRARY_PATH'] ]
      elsif FFI::Platform::IS_WINDOWS
        ENV['PATH'].split(File::PATH_SEPARATOR)
      else
        [ '/usr/local/{lib64,lib32,lib}', '/opt/local/{lib64,lib32,lib}', '/usr/{lib64,lib32,lib}' ]
      end
    end
  end

  def self.find_lib(lib)
    files = search_paths.inject(Array.new) do |array, path|
      file_name = File.expand_path(File.join(path, "#{lib}.#{FFI::Platform::LIBSUFFIX}"))
      array << Dir.glob(file_name)
      array
    end
    files.flatten.compact.first
  end

  def self.free_image_library_paths
    @free_image_library_paths ||= begin
      libs = %w{libfreeimage libfreeimage.3 libfreeimage-3 FreeImage}

      libs.map do |lib|
        find_lib(lib)
      end.compact
    end
  end

  extend ::FFI::Library

  if free_image_library_paths.any?
    ffi_lib(*free_image_library_paths)
  else
    ffi_lib("freeimage")
  end

  ffi_convention :stdcall if FFI::Platform.windows?
end


# Types
require 'free-image/types/ffi'
require 'free-image/types/boolean'

# More types
require 'free-image/types/rgb_triple'
require 'free-image/types/rgb_quad'
require 'free-image/types/rgb16'
require 'free-image/types/rgba16'
require 'free-image/types/rgbf'
require 'free-image/types/rgbaf'
require 'free-image/types/complex'
require 'free-image/types/info_header'

# Enums
require 'free-image/enums/color_types'
require 'free-image/enums/dithers'
require 'free-image/enums/filters'
require 'free-image/enums/formats'
require 'free-image/enums/image_types'

# Sources
require 'free-image/sources/abstract_source'
require 'free-image/sources/io'
require 'free-image/sources/file'
require 'free-image/sources/memory'

# Modules
require 'free-image/modules/conversions'
require 'free-image/modules/helper'
require 'free-image/modules/icc'
require 'free-image/modules/information'
require 'free-image/modules/modify'
require 'free-image/modules/pixels'
require 'free-image/modules/transforms'

# Main classes
require 'free-image/errors'
require 'free-image/palette'
require 'free-image/scanline'
require 'free-image/bitmap'