Added new interpolation types for transformation functions

Author: 9prady9

src/defines.rs

@@ -147,6 +147,18 @@ pub enum InterpType {
     BILINEAR= 2,
     /// Cubic interpolation method
     CUBIC   = 3,
+    /// Floor indexed
+    LOWER   = 4,
+    /// Linear interpolation with cosine smoothing
+    LINEAR_COSINE   = 5,
+    /// Bilinear interpolation with cosine smoothing
+    BILINEAR_COSINE = 6,
+    /// Bicubic interpolation
+    BICUBIC         = 7,
+    /// Cubic interpolation with Catmull-Rom splines
+    CUBIC_SPLINE    = 8,
+    /// Bicubic interpolation with Catmull-Rom splines
+    BICUBIC_SPLINE  = 9
 }
 
 /// Helps determine how to pad kernels along borders

src/util.rs

@@ -39,7 +39,7 @@ impl From<i32> for DType {
 
 impl From<i32> for InterpType {
     fn from(t: i32) -> InterpType {
-        assert!(InterpType::NEAREST as i32 <= t && t <= InterpType::CUBIC as i32);
+        assert!(InterpType::NEAREST as i32 <= t && t <= InterpType::BICUBIC_SPLINE as i32);
         unsafe { mem::transmute(t) }
     }
 }