GC plot: Precautions for using GC. setxormode

GC. setxormode is invalid when GC advanced mode is enabled.

In addition, some methods such as GC. setalpha and GC. setantialias (SWT. On) automatically enable the advanced plotting mode.

Method prototype:
/* @ Deprecated this functionality is not supported on some platforms
*/
Public void setxormode (Boolean XOR ){
If (handle = 0) SWT. Error (SWT. error_graphic_disposed );
OS. setrop2 (handle, XOR? OS. r2_xorpen: OS. r2_copypen );
}

Currently, the GC. setxormode method is not recommended. After this method is used, functions and features are not supported by all systems.