Module: EZDraw

Defined in:
lib/ezdraw.rb

Defined Under Namespace

Modules: DSL Classes: Font, Image, Window

Constant Summary collapse

White = 
[0xff, 0xff, 0xff, 0xff].freeze
Black = 
[0x00, 0x00, 0x00, 0xff].freeze
Gray = 
[0x88, 0x88, 0x88, 0xff].freeze
Red = 
[0xff, 0x00, 0x00, 0xff].freeze
Green = 
[0x00, 0xff, 0x00, 0xff].freeze
Blue = 
[0x00, 0x00, 0xff, 0xff].freeze
Yellow = 
[0xff, 0xff, 0x00, 0xff].freeze
Magenta = 
[0xff, 0x00, 0xff, 0xff].freeze
Cyan = 
[0x00, 0xff, 0xff, 0xff].freeze
Brown = 
[0xa5, 0x2a, 0x2a, 0xff].freeze
None = 
[0x00, 0x00, 0x00, 0x00].freeze
@@logger = 
Logger.new(STDERR)
@@inited = 
false

Class Method Summary collapse

Class Method Details

.cleanup ⇒ Object 



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# File 'lib/ezdraw.rb', line 69

def self.cleanup
 requires_init
 Font.cleanup
 Image.cleanup
 Window.cleanup
 SDL2.SDL_Quit
 @@inited = false
 nil
end

.default_font ⇒ Object 



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# File 'lib/ezdraw.rb', line 56

def self.default_font
 requires_init
 @@default_font
end

.delay(msec) ⇒ Object 



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# File 'lib/ezdraw.rb', line 79

def self.delay(msec)
 requires_init
 SDL2.SDL_Delay(msec)
 nil
end

.init ⇒ Object 



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# 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

.inited ⇒ Object 



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# File 'lib/ezdraw.rb', line 61

def self.inited
 @@inited == true
end

.logger ⇒ Object 



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# File 'lib/ezdraw.rb', line 24

def self.logger
 @@logger
end

.requires_init ⇒ Object 



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# File 'lib/ezdraw.rb', line 65

def self.requires_init
 raise "EZDraw is not initialized. first call EZDraw.init" if not inited
end

.waitkey ⇒ Object

this version cherry-picks keyboard events from the queue



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# 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