////// The blending modes that the renderer must support (most of the Porter-Duff modes)
///#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]pubenumBlendMode{
SourceOver,
DestinationOver,
SourceIn,
DestinationIn,
SourceOut,
DestinationOut,
SourceATop,
DestinationATop,
AllChannelAlphaSourceOver,
AllChannelAlphaDestinationOver
}