Method: SDL.setup_touch_symbols

Defined in:
lib/sdl2_touch.rb

.setup_touch_symbols(output_error = false) ⇒ Object

Function



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# File 'lib/sdl2_touch.rb', line 43

def self.setup_touch_symbols(output_error = false)
  symbols = [
    :SDL_GetNumTouchDevices,
    :SDL_GetTouchDevice,
    :SDL_GetTouchName,
    :SDL_GetTouchDeviceType,
    :SDL_GetNumTouchFingers,
    :SDL_GetTouchFinger,
  ]
  apis = {
    :SDL_GetNumTouchDevices => :GetNumTouchDevices,
    :SDL_GetTouchDevice => :GetTouchDevice,
    :SDL_GetTouchName => :GetTouchName,
    :SDL_GetTouchDeviceType => :GetTouchDeviceType,
    :SDL_GetNumTouchFingers => :GetNumTouchFingers,
    :SDL_GetTouchFinger => :GetTouchFinger,
  }
  args = {
    :SDL_GetNumTouchDevices => [],
    :SDL_GetTouchDevice => [:int],
    :SDL_GetTouchName => [:int],
    :SDL_GetTouchDeviceType => [:long_long],
    :SDL_GetNumTouchFingers => [:long_long],
    :SDL_GetTouchFinger => [:long_long, :int],
  }
  retvals = {
    :SDL_GetNumTouchDevices => :int,
    :SDL_GetTouchDevice => :long_long,
    :SDL_GetTouchName => :pointer,
    :SDL_GetTouchDeviceType => :int,
    :SDL_GetNumTouchFingers => :int,
    :SDL_GetTouchFinger => :pointer,
  }
  symbols.each do |sym|
    begin
      attach_function apis[sym], sym, args[sym], retvals[sym]
    rescue FFI::NotFoundError => error
      $stderr.puts("[Warning] Failed to import #{sym} (#{error}).") if output_error
    end
  end
end