BlendMode クラス

[内容]

　　色に対するブレンドモードを取得，設定するための定数を保持するクラスです．

継承：　BlendMode → Object

[定数]　　すべて static

• ADD : String = "add"
  　　表示オブジェクトのカラー値を背景色に加算（上限： 0xff ）

• ALPHA : String = "alpha"
  　　表示オブジェクトの各ピクセルのアルファ値を背景に適用．コンテナのブレンドモードを LAYER にしておく必要がある．

• DARKEN : String = "darken"
  　　表示オブジェクトの色と背景色を色ごとに比較し，暗い方の値を選択

• DIFFERENCE : String = "difference"
  　　表示オブジェクトの色と背景色を色ごとに比較し，その大きい方の値からの差を計算

• ERASE : String = "erase"
  　　表示オブジェクトの透明度に基づき背景を消去

• HARDLIGHT : String = "hardlight"
  　　表示オブジェクトが 50 ％グレーより明るい場合，表示オブジェクトと背景の色がスクリーン処理され明るくなる．表示オブジェクトが 50 ％グレーより暗い場合，カラーが乗算され暗くなる．

• INVERT : String = "invert"
  　　背景色を反転

• LAYER : String = "layer"
  　　表示オブジェクトに関する透明度グループを強制的に作成

• LIGHTEN : String = "lighten"
  　　表示オブジェクトの色と背景色を色ごとに比較し，明るい方の値を選択

• MULTIPLY : String = "multiply"
  　　表示オブジェクトの色と背景色を乗算し，0xFF で除算

• NORMAL : String = "normal"
  　　通常の表示

• OVERLAY : String = "overlay"
  　　背景が 50 ％グレーより明るい場合，表示オブジェクトと背景の色がスクリーン処理され明るくなる．背景が 50 ％グレーより暗い場合，カラーが乗算され暗くなる．

• SCREEN : String = "screen"
  　　表示オブジェクトの色の補数と背景色の補数を乗算，0xFF で除算

• SUBTRACT : String = "subtract"
  　　表示オブジェクトの色から背景色を減算（下限： 0 ）

[使用例]

1. 以下に示すのは，「ブレンドモードの適用例」と，そのプログラム例です．

   		// 色の加算
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_add extends Sprite
   	{
   		public function BlendMode_add()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0xff00ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			bm4.blendMode = BlendMode.ADD;
   			addChild(bm4);
   		}
   	}
   }
   
   		// 大きい方からの色の差
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_difference extends Sprite
   	{
   		public function BlendMode_difference()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0xff00ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			bm4.blendMode = BlendMode.DIFFERENCE;
   			addChild(bm4);
   		}
   	}
   }
   
   		// 背景色からの差
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_subtract extends Sprite
   	{
   		public function BlendMode_subtract()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0xff00ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			bm4.blendMode = BlendMode.SUBTRACT;
   			addChild(bm4);
   		}
   	}
   }
   
   		// オブジェクト色と背景色の乗算
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_multiply extends Sprite
   	{
   		public function BlendMode_multiply()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0xff00ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			bm4.blendMode = BlendMode.MULTIPLY;
   			addChild(bm4);
   		}
   	}
   }
   
   		// オブジェクト色と背景色の補数どうしの乗算
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_screen extends Sprite
   	{
   		public function BlendMode_screen()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0xff00ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			bm4.blendMode = BlendMode.SCREEN;
   			addChild(bm4);
   		}
   	}
   }
   
   		// 暗い方の値を選択
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_darken extends Sprite
   	{
   		public function BlendMode_darken()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0xff00ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			bm4.blendMode = BlendMode.DARKEN;
   			addChild(bm4);
   		}
   	}
   }
   
   		// 明るい方の値を選択
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_lighten extends Sprite
   	{
   		public function BlendMode_lighten()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0xff00ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			bm4.blendMode = BlendMode.LIGHTEN;
   			addChild(bm4);
   		}
   	}
   }
   
   		// 表示オブジェクトの暗さに基き色を調整
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_hardlight extends Sprite
   	{
   		public function BlendMode_hardlight()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xff550000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0xff005500);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff000055);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			bm4.blendMode = BlendMode.HARDLIGHT;
   			addChild(bm4);
   		}
   	}
   }
   
   		// 背景の暗さに基き色を調整
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_overlay extends Sprite
   	{
   		public function BlendMode_overlay()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xff550000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff005500);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff000055);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0xff00ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			bm4.blendMode = BlendMode.OVERLAY;
   			addChild(bm4);
   		}
   	}
   }
   
   		// 背景色を反転
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_invert extends Sprite
   	{
   		public function BlendMode_invert()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0xff00ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			bm4.blendMode = BlendMode.INVERT;
   			addChild(bm4);
   		}
   	}
   }
   
   		// 透明度を背景に適用
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_alpha extends Sprite
   	{
   		public function BlendMode_alpha()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0x0000ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			blendMode = BlendMode.LAYER;
   			bm4.blendMode = BlendMode.ALPHA;
   			addChild(bm4);
   		}
   	}
   }
   
   		// 透明度に基づき背景を消去
   package
   {
   	import flash.display.Sprite;
   	import flash.display.Bitmap;
   	import flash.display.BitmapData;
   	import flash.display.BlendMode;
   	import flash.geom.Rectangle;
   
   	[SWF(backgroundColor="0xffffff", width="300", height="150", frameRate="30")]
   
   	public class BlendMode_erase extends Sprite
   	{
   		public function BlendMode_erase()
   		{
   			init();
   		}
   		
   		private function init():void
   		{
   					// 適用前
   			var bmd1 : BitmapData = new BitmapData(100, 75, true, 0xffffffff);
   			bmd1.fillRect(new Rectangle(0,0,100,25), 0xffff0000);
   			bmd1.fillRect(new Rectangle(0,25,100,25), 0xff00ff00);
   			bmd1.fillRect(new Rectangle(0,50,100,25), 0xff0000ff);
   			var bm1 : Bitmap = new Bitmap(bmd1);
   			bm1.x = 25;
   			bm1.y = 50;
   			addChild(bm1);
   			var bmd2 : BitmapData = new BitmapData(75, 100, true, 0xffffffff);
   			bmd2.fillRect(new Rectangle(0,0,25,100), 0xffff0000);
   			bmd2.fillRect(new Rectangle(25,0,25,100), 0x0000ff00);
   			bmd2.fillRect(new Rectangle(50,0,25,100), 0xff0000ff);
   			var bm2 : Bitmap = new Bitmap(bmd2);
   			bm2.x = 50;
   			bm2.y = 25;
   			addChild(bm2);
   					// 適用後
   			var bmd3: BitmapData = bmd1.clone();
   			var bm3 : Bitmap = new Bitmap(bmd3);
   			bm3.x = 175;
   			bm3.y = 50;
   			addChild(bm3);
   			var bmd4 : BitmapData = bmd2.clone();
   			var bm4 : Bitmap = new Bitmap(bmd4);
   			bm4.x = 200;
   			bm4.y = 25;
   			blendMode = BlendMode.LAYER;
   			bm4.blendMode = BlendMode.ERASE;
   			addChild(bm4);
   		}
   	}
   }