textium::texture::Bitmap: add raw() -> &[T], into_raw() -> Vec<T>

textium/src/texture.rs

@@ -70,6 +70,14 @@ impl<T> Bitmap<T> where T: Clone + Default {
     pub fn lines(&self) -> Chunks<T> {
         self.data.chunks(self.width)
     }
+
+    pub fn raw(&self) -> &[T] {
+        &self.data
+    }
+
+    pub fn into_raw(self) -> Vec<T> {
+        self.data
+    }
 }
 
 impl<T> Buffer2d for Bitmap<T> where T: Clone {