module EZDraw

# File lib/ezdraw.rb, line 69
def self.cleanup
 requires_init
 Font.cleanup
 Image.cleanup
 Window.cleanup
 SDL2.SDL_Quit
 @@inited = false
 nil
end

# File lib/ezdraw.rb, line 56
def self.default_font
 requires_init
 @@default_font
end

# File lib/ezdraw.rb, line 79
def self.delay(msec)
 requires_init
 SDL2.SDL_Delay(msec)
 nil
end

# File lib/ezdraw.rb, line 38
def self.init
 return if inited

 if SDL2.SDL_WasInit(SDL2::SDL_INIT_VIDEO) == 0
  err = SDL2.SDL_Init(SDL2::SDL_INIT_VIDEO)
  raise "SDL_Init: ${SDL2.SDL_GetError}" if err != 0
 end

 Image.init
 Font.init

 @@inited = true

 # TODO: set font size more dynamically?
 @@default_font = EZDraw::Font.new(gem_relative_path("res/AnonymousPro-Regular.ttf"), 20)
 nil
end

# File lib/ezdraw.rb, line 61
def self.inited
 @@inited == true
end

# File lib/ezdraw.rb, line 24
def self.logger
 @@logger
end

# File lib/ezdraw.rb, line 65
def self.requires_init
 raise "EZDraw is not initialized. first call EZDraw.init" if not inited
end

# File lib/ezdraw.rb, line 96
def self.waitkey
 requires_init
 ev_p = FFI::MemoryPointer.new SDL2::SDL_Event, 1, false
 ev = SDL2::SDL_Event.new ev_p
 #cev = SDL2::SDL_CommonEvent.new ev_p

 loop do
  nev = SDL2.SDL_PeepEvents(ev_p, 1, SDL2::SDL_GETEVENT, SDL2::SDL_KEYDOWN, SDL2::SDL_KEYUP)

  raise "error: peepevents" if nev < 0
  if nev == 0
   SDL2.SDL_PumpEvents
   delay 1
   next
  end

  #EZDraw.logger.debug("0x#{ev[:common][:type].to_s(16)}")
  if ev[:common][:type] == SDL2::SDL_KEYDOWN
   return SDL2.SDL_GetKeyName(ev[:key][:keysym][:keycode]).to_s
  end
 end
end

# File lib/ezdraw.rb, line 29
def self.gem_relative_path(path)
 gem_root = File.expand_path('..', File.dirname(__FILE__))
 path = File.join(*(path.split("/")))
 File.join(gem_root, path)
end