diff --git a/azure.rs b/azure.rs
index 29be455..61cd1e5 100644
--- a/azure.rs
+++ b/azure.rs
@@ -79,7 +79,22 @@ pub static AZ_OP_DEST_OUT: u32 = 7_u32;
 pub static AZ_OP_DEST_OVER: u32 = 8_u32;
 pub static AZ_OP_DEST_ATOP: u32 = 9_u32;
 pub static AZ_OP_XOR: u32 = 10_u32;
-pub static AZ_OP_COUNT: u32 = 11_u32;
+pub static AZ_OP_MULTIPLY: u32 = 11_u32;
+pub static AZ_OP_SCREEN: u32 = 12_u32;
+pub static AZ_OP_OVERLAY: u32 = 13_u32;
+pub static AZ_OP_DARKEN: u32 = 14_u32;
+pub static AZ_OP_LIGHTEN: u32 = 15_u32;
+pub static AZ_OP_COLOR_DODGE: u32 = 16_u32;
+pub static AZ_OP_COLOR_BURN: u32 = 17_u32;
+pub static AZ_OP_HARD_LIGHT: u32 = 18_u32;
+pub static AZ_OP_SOFT_LIGHT: u32 = 19_u32;
+pub static AZ_OP_DIFFERENCE: u32 = 20_u32;
+pub static AZ_OP_EXCLUSION: u32 = 21_u32;
+pub static AZ_OP_HUE: u32 = 22_u32;
+pub static AZ_OP_SATURATION: u32 = 23_u32;
+pub static AZ_OP_COLOR: u32 = 24_u32;
+pub static AZ_OP_LUMINOSITY: u32 = 25_u32;
+pub static AZ_OP_COUNT: u32 = 26_u32;
 
 pub type enum_AzExtendMode = c_uint;
 pub static AZ_EXTEND_CLAMP: u32 = 0_u32;
diff --git a/azure_hl.rs b/azure_hl.rs
index 9efa863..abc990a 100644
--- a/azure_hl.rs
+++ b/azure_hl.rs
@@ -184,6 +184,23 @@ impl DrawOptions {
             fields: self.fields
         }
     }
+
+    pub fn set_composition_op(&mut self, style: u8) {
+        self.fields = self.fields & 0b1111_1111_0000_0000_u16;
+        self.fields = self.fields | style as u16;
+    }
+
+    pub fn set_antialias_mode(&mut self, style: u8) {
+        self.fields = self.fields & 0b1111_1000_1111_1111_u16; 
+        let style = ((style & 7) as u16) << 8;
+        self.fields = self.fields | style;
+    }
+
+    pub fn set_snapping(&mut self, style: u8) {
+        self.fields = self.fields & 0b1111_0111_1111_1111_u16;
+        let style = ((style & 1) as u16) << 11;
+        self.fields = self.fields | style;
+    }
 }