feat(shader-ast-stdlib): add ACES film tonemapping

- update module re-exports

packages/shader-ast-stdlib/src/color/aces-film.ts

@@ -0,0 +1,21 @@
+import { add, defn, div, mul, ret } from "@thi.ng/shader-ast";
+import { clamp01 } from "../math/clamp";
+
+/**
+ * Filmic HDR -> LDR mapping based on ACES.
+ *
+ * Reference:
+ * https://knarkowicz.wordpress.com/2016/01/06/aces-filmic-tone-mapping-curve/
+ *
+ * @param col
+ */
+export const ACESFilm = defn("vec3", "ACESFilm", ["vec3"], (col) => [
+    ret(
+        clamp01(
+            div(
+                mul(col, add(mul(col, 2.51), 0.03)),
+                add(mul(col, add(mul(col, 2.43), 0.59)), 0.14)
+            )
+        )
+    ),
+]);

packages/shader-ast-stdlib/src/index.ts

@@ -1,5 +1,6 @@
 export * from "./api";
 
+export * from "./color/aces-film";
 export * from "./color/linear-srgb";
 export * from "./color/luminance";
 export * from "./color/porter-duff";
@@ -21,6 +22,8 @@ export * from "./math/fit";
 export * from "./math/magsq";
 export * from "./math/maxcomp";
 export * from "./math/mincomp";
+export * from "./math/mix-cubic";
+export * from "./math/mix-quadratic";
 export * from "./math/orthogonal";
 export * from "./math/polar";
 export * from "./math/sincos";