Add AlphaChannelType enum values
Add some enum values of AlphaChannelType declared in ImageMagick 6.8.9.
@@ -885,6 +885,9 @@ Init_RMagick2(void)
ENUMERATOR(ShapeAlphaChannel)
ENUMERATOR(TransparentAlphaChannel)
ENUMERATOR(BackgroundAlphaChannel)
+ ENUMERATOR(FlattenAlphaChannel)
+ ENUMERATOR(AssociateAlphaChannel)
+ ENUMERATOR(DisassociateAlphaChannel)
END_ENUM
// AnchorType constants (for Draw#text_anchor - these are not defined by ImageMagick)
