feat(#1): initial implementation

options.go

@@ -0,0 +1,29 @@
+package bimg
+
+const QUALITY = 80
+
+type Gravity int
+
+type Interpolator int
+
+var interpolations = map[Interpolator]string{
+	BICUBIC:  "bicubic",
+	BILINEAR: "bilinear",
+	NOHALO:   "nohalo",
+}
+
+func (i Interpolator) String() string {
+	return interpolations[i]
+}
+
+type Options struct {
+	Height       int
+	Width        int
+	Crop         bool
+	Enlarge      bool
+	Extend       int
+	Embed        bool
+	Interpolator Interpolator
+	Gravity      Gravity
+	Quality      int
+}