this code is evil, but works fas

floodfill_part.cs

	static PointsRegion __newPointsRegion;
	static int __yy,__xx;
	static bool __prevPixelSeed;
	
	private static void scanUpBelowPixelsRegionForward (ref int xLeft, ref int xRight, ref int baseY, ref int maxY, ref PointsRegion pointsRegion, 
							ref Color32[,] colors, ref bool[,] persistentBorder, ref Color32 seedColor, ref Queue queue, bool[,] resultRegion) {

		__newPointsRegion = new PointsRegion ();

		__yy = baseY + pointsRegion.direction;         
		if (__yy >= 0 && __yy < maxY) {
			__prevPixelSeed = false;   			
			for (__xx = xLeft; __xx<=xRight; __xx++) {                                    
				if (resultRegion [__xx, __yy] != true
				    && (!persistentBorder [__xx, __yy] 
				    	&& ((colors [__xx, __yy].a < 255) 
				    	     || (   seedColor.r == colors[__xx, __yy].r 
				    		 && seedColor.g == colors[__xx, __yy].g 
				    		 && seedColor.b == colors[__xx, __yy].b 
				    		 && seedColor.a == colors[__xx, __yy].a)))

				    ) {
					if (!__prevPixelSeed) {            
						__newPointsRegion.direction = pointsRegion.direction         ;
						__newPointsRegion.y         = __yy                ;                                                       
						__newPointsRegion.xLeft     = __xx                ;                                                 
						__prevPixelSeed             = true              ;						
					}                                               
				} else {
					if (__prevPixelSeed) {             
						__newPointsRegion.xRight  = __xx-1;                                        
						__prevPixelSeed = false;                                                    
						queue.Enqueue (__newPointsRegion);
					}                                       
				}                                                       
			}     
			if(__prevPixelSeed){
				__newPointsRegion.xRight = xRight;
				queue.Enqueue(__newPointsRegion);
			}
		}
	}