ActionScript 3 ActionScript 3 SliceBitmap类

Posted 2021-05-23

package  {
	
	import flash.display.BitmapData;
	import flash.display.DisplayObject;
	import flash.geom.Matrix;
	import flash.geom.Rectangle;
	
	public class SliceBitmap {
		
		public function SliceBitmap() {
			/*
			Author: Chrysto Panayotov ( burnandbass[at]gmail[dot]com )
			AS3 util to slice horizontal bitmaps... The names of the static functions are self-explanary, returns array of bitmapData's
			
			*/
		}
		
		public static function sliceBitmap(_bitmapToSlice:DisplayObject, pieces:Number = 2, disposeOriginal:Boolean = false):Array{
			var slicesArray:Array = [];
			var tempWidth:Number = 0;
			for(var i:uint = 0; i< pieces; i++){
				var cropMatrix:Matrix = new Matrix();
				cropMatrix.translate(-tempWidth,0);
				var cropRectangle:Rectangle = new Rectangle(0,0,(_bitmapToSlice.width/pieces),_bitmapToSlice.height);
				var tempBitmap:BitmapData = new BitmapData(_bitmapToSlice.width/pieces,_bitmapToSlice.height);
				tempBitmap.draw(_bitmapToSlice,cropMatrix,null,null,cropRectangle,true);
				tempWidth += tempBitmap.width;
				slicesArray.push(tempBitmap);
			}
			return slicesArray;
			if(disposeOriginal){ _bitmapToSlice.dispose() }
		}
		
		public static function sliceBitmapOffset(_bitmapToSlice:DisplayObject, pieces:Number = 2, disposeOriginal:Boolean = false,piecesOffset:Number = 2):Array{
			var slicesArray:Array = [];
			var tempWidth:Number = 0;
			for(var i:uint = 0; i< pieces; i++){
				var cropMatrix:Matrix = new Matrix();
				cropMatrix.translate(-tempWidth,0);
				var cropRectangle:Rectangle = new Rectangle(0,0,(_bitmapToSlice.width - (pieces-1)*piecesOffset)/pieces,_bitmapToSlice.height);
				var tempBitmap:BitmapData = new BitmapData( (_bitmapToSlice.width-(pieces-1)*piecesOffset)/pieces,_bitmapToSlice.height);
				tempBitmap.draw(_bitmapToSlice,cropMatrix,null,null,cropRectangle,true);
				tempWidth += tempBitmap.width + piecesOffset;
				slicesArray.push(tempBitmap);
			}
			return slicesArray;
			if(disposeOriginal){ _bitmapToSlice.dispose() }
		}

	}//end	
}