update color fns

Author: joseluis

src/color/fns.rs

@@ -1,42 +1,28 @@
 // devela::color::fns
 //
 
-#[cfg(all(feature = "no_std", feature = "dep"))]
-use crate::_dep::libm::Libm;
+#[cfg(feature = "libm")]
+use crate::ops::FloatExt;
 
 /// Applies the `gamma` to an `f32` channel.
 #[inline]
-#[cfg(any(feature = "std", all(feature = "no_std", feature = "dep")))]
-#[cfg_attr(
-    feature = "nightly",
-    doc(cfg(any(feature = "std", all(feature = "no_std", feature = "dep"))))
-)]
+#[cfg(any(feature = "std", feature = "libm"))]
+#[cfg_attr(feature = "nightly", doc(cfg(any(feature = "std", feature = "libm"))))]
 pub fn linearize32(nonlinear: f32, gamma: f32) -> f32 {
     if nonlinear >= 0.04045 {
-        #[cfg(feature = "std")]
         return ((nonlinear + 0.055) / (1. + 0.055)).powf(gamma);
-
-        #[cfg(not(feature = "std"))]
-        return Libm::<f32>::pow((nonlinear + 0.055) / (1. + 0.055), gamma);
     } else {
         nonlinear / 12.92
     }
 }
 
 /// Removes the `gamma` from an `f32` channel.
 #[inline]
-#[cfg(any(feature = "std", all(feature = "no_std", feature = "dep")))]
-#[cfg_attr(
-    feature = "nightly",
-    doc(cfg(any(feature = "std", all(feature = "no_std", feature = "dep"))))
-)]
+#[cfg(any(feature = "std", feature = "libm"))]
+#[cfg_attr(feature = "nightly", doc(cfg(any(feature = "std", feature = "libm"))))]
 pub fn nonlinearize32(linear: f32, gamma: f32) -> f32 {
     if linear >= 0.0031308 {
-        #[cfg(feature = "std")]
         return (1.055) * linear.powf(1.0 / gamma) - 0.055;
-
-        #[cfg(not(feature = "std"))]
-        return (1.055) * Libm::<f32>::pow(linear, 1.0 / gamma) - 0.055;
     } else {
         12.92 * linear
     }