Add DitherMethod type

src/types/dither_method.rs

@@ -0,0 +1,22 @@
+use crate::bindings;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[repr(u32)]
+pub enum DitherMethod {
+    Undefined      = bindings::DitherMethod_UndefinedDitherMethod,
+    No             = bindings::DitherMethod_NoDitherMethod,
+    Riemersma      = bindings::DitherMethod_RiemersmaDitherMethod,
+    FloydSteinberg = bindings::DitherMethod_FloydSteinbergDitherMethod,
+}
+
+impl Default for DitherMethod {
+    fn default() -> Self {
+        return DitherMethod::No;
+    }
+}
+
+impl From<DitherMethod> for bindings::DitherMethod {
+    fn from(value: DitherMethod) -> Self {
+        return value as bindings::DitherMethod;
+    }
+}

src/types/mod.rs

@@ -1,9 +1,11 @@
 mod colorspace_type;
 mod composite_operator;
+mod dither_method;
 mod metric_type;
 mod resource_type;
 
 pub use self::colorspace_type::ColorspaceType;
 pub use self::composite_operator::CompositeOperator;
+pub use self::dither_method::DitherMethod;
 pub use self::metric_type::MetricType;
 pub use self::resource_type::ResourceType;