derivative: rename derivative functions to match GLSL

Author: Firestar99

crates/spirv-std/src/arch/derivative.rs

@@ -39,7 +39,7 @@ pub unsafe trait Derivative: Sealed + Default {
     /// This instruction is only valid in the Fragment Execution Model.
     #[crate::macros::gpu_only]
     #[inline]
-    fn ddx(self) -> Self {
+    fn dfdx(self) -> Self {
         deriv_fn!(OpDPdx, self)
     }
 
@@ -52,7 +52,7 @@ pub unsafe trait Derivative: Sealed + Default {
     /// This instruction is only valid in the Fragment Execution Model.
     #[crate::macros::gpu_only]
     #[inline]
-    fn ddx_fine(self) -> Self {
+    fn dfdx_fine(self) -> Self {
         cap_deriv_control!();
         deriv_fn!(OpDPdxFine, self)
     }
@@ -68,7 +68,7 @@ pub unsafe trait Derivative: Sealed + Default {
     /// This instruction is only valid in the Fragment Execution Model.
     #[crate::macros::gpu_only]
     #[inline]
-    fn ddx_coarse(self) -> Self {
+    fn dfdx_coarse(self) -> Self {
         cap_deriv_control!();
         deriv_fn!(OpDPdxCoarse, self)
     }
@@ -83,7 +83,7 @@ pub unsafe trait Derivative: Sealed + Default {
     /// This instruction is only valid in the Fragment Execution Model.
     #[crate::macros::gpu_only]
     #[inline]
-    fn ddy(self) -> Self {
+    fn dfdy(self) -> Self {
         deriv_fn!(OpDPdy, self)
     }
 
@@ -96,7 +96,7 @@ pub unsafe trait Derivative: Sealed + Default {
     /// This instruction is only valid in the Fragment Execution Model.
     #[crate::macros::gpu_only]
     #[inline]
-    fn ddy_fine(self) -> Self {
+    fn dfdy_fine(self) -> Self {
         cap_deriv_control!();
         deriv_fn!(OpDPdyFine, self)
     }
@@ -112,7 +112,7 @@ pub unsafe trait Derivative: Sealed + Default {
     /// This instruction is only valid in the Fragment Execution Model.
     #[crate::macros::gpu_only]
     #[inline]
-    fn ddy_coarse(self) -> Self {
+    fn dfdy_coarse(self) -> Self {
         cap_deriv_control!();
         deriv_fn!(OpDPdyCoarse, self)
     }

tests/ui/arch/derivative.rs

@@ -10,7 +10,7 @@ pub fn main() {
 }
 
 pub fn derivative() {
-    Derivative::ddx(0.);
-    Derivative::ddy(0.);
+    Derivative::dfdx(0.);
+    Derivative::dfdy(0.);
     Derivative::fwidth(0.);
 }

tests/ui/arch/derivative_control.rs

@@ -11,11 +11,11 @@ pub fn main() {
 }
 
 pub fn derivative() {
-    Derivative::ddx_fine(0.);
-    Derivative::ddy_fine(0.);
+    Derivative::dfdx_fine(0.);
+    Derivative::dfdy_fine(0.);
     Derivative::fwidth_fine(0.);
 
-    Derivative::ddx_coarse(0.);
-    Derivative::ddy_coarse(0.);
+    Derivative::dfdx_coarse(0.);
+    Derivative::dfdy_coarse(0.);
     Derivative::fwidth_coarse(0.);
 }