Add FLX_FREE_IMAGE_BUFFER

Author: ACrazyTown

flixel/graphics/FlxGraphic.hx

@@ -633,6 +633,10 @@ class FlxGraphic implements IFlxDestroyable
 					FlxG.log.warn('Graphic dimensions (${width}x${height}) exceed the maximum allowed size (${max}x${max}), which may cause rendering issues.');
 			}
 			#end
+
+			#if FLX_FREE_IMAGE_BUFFER
+			freeImageBuffer();
+			#end
 		}
 
 		return value;

flixel/system/macros/FlxDefines.hx

@@ -58,6 +58,12 @@ private enum UserDefines
 	 * If this flag is set to any string, that is used for the file extension
 	 */
 	FLX_DEFAULT_SOUND_EXT;
+	/**
+	 * If enabled, FlxGraphic instances will automatically call `FlxGraphic.freeImageBuffer()`.
+	 * This significantly decreases RAM usage but makes the bitmap uneditable.
+	 * Call `FlxGraphic.refresh()` to restore functionality for drawing on the bitmap.
+	 */
+	FLX_FREE_IMAGE_BUFFER;
 }
 
 /**