FlxTilemap: add antialiasing (HaxeFlixel#1850)

flixel/tile/FlxTilemap.hx

@@ -60,6 +60,11 @@ class FlxTilemap extends FlxBaseTilemap<FlxTile>
 	 */
 	public var scale(default, null):FlxPoint;
 
+	/**
+	 * Controls whether the object is smoothed when rotated, affects performance.
+	 */
+	public var antialiasing(default, set):Bool = false;
+
 	/**
 	 * Use to offset the drawing position of the tilemap,
 	 * just like FlxSprite.
@@ -806,7 +811,7 @@ class FlxTilemap extends FlxBaseTilemap<FlxTile>
 			scaledHeight = _scaledTileHeight;
 
 			var hasColorOffsets:Bool = (colorTransform != null && colorTransform.hasRGBAOffsets());
-			drawItem = Camera.startQuadBatch(graphic, isColored, hasColorOffsets, blend);
+			drawItem = Camera.startQuadBatch(graphic, isColored, hasColorOffsets, blend, antialiasing);
 		}
 
 		// Copy tile images into the tile buffer
@@ -970,6 +975,10 @@ class FlxTilemap extends FlxBaseTilemap<FlxTile>
 	{
 		var buffer = new FlxTilemapBuffer(_tileWidth, _tileHeight, widthInTiles, heightInTiles, camera, scale.x, scale.y);
 		buffer.pixelPerfectRender = pixelPerfectRender;
+		if (FlxG.renderBlit)
+		{
+			buffer.antialiasing = antialiasing;
+		}
 		return buffer;
 	}
 
@@ -1013,6 +1022,19 @@ class FlxTilemap extends FlxBaseTilemap<FlxTile>
 	}
 	#end
 
+	private function set_antialiasing(value:Bool):Bool
+	{
+		antialiasing = value;
+		if (FlxG.renderBlit)
+		{
+			for (buffer in _buffers)
+			{
+				buffer.antialiasing = antialiasing;
+			}
+		}
+		return antialiasing;
+	}
+
 	/**
 	 * Internal function for setting graphic property for this object. 
 	 * It changes graphic' useCount also for better memory tracking.

flixel/tile/FlxTilemapBuffer.hx

@@ -58,6 +58,7 @@ class FlxTilemapBuffer implements IFlxDestroyable
 	public var pixels(default, null):BitmapData;
 
 	public var blend:BlendMode;
+	public var antialiasing:Bool = false;
 
 	private var _flashRect:Rectangle;
 	private var _matrix:Matrix;
@@ -137,7 +138,7 @@ class FlxTilemapBuffer implements IFlxDestroyable
 			_matrix.identity();
 			_matrix.scale(ScaleX, ScaleY);
 			_matrix.translate(FlashPoint.x, FlashPoint.y);
-			Camera.buffer.draw(pixels, _matrix, null, blend);
+			Camera.buffer.draw(pixels, _matrix, null, blend, null, antialiasing);
 		}
 	}