Allows to compile kernels for Metal backend, which happens at runtime.

@@ -0,0 +1,223 @@
+# SPDX-FileCopyrightText: 2011-2024 Blender Foundation

@@ -11,0 +28,4 @@
+ * to make the data more linear (which lets us reduce the table size).
+ */
+
+ccl_device_inline float booth_inversion_table(KernelGlobals kg,

@@ -0,0 +22,4 @@
+ *
+ * Based on "A Robust Eigensolver for 3 x 3 Symmetric Matrices" by David Eberly
+ * (https://www.geometrictools.com/Documentation/RobustEigenSymmetric3x3.pdf). */
+ccl_device float3 eigendecomposition_3x3_symmetric(float a00,

@@ -0,0 +1,223 @@
+# SPDX-FileCopyrightText: 2011-2024 Blender Foundation

@@ -11,0 +27,4 @@
+ * for what would otherwise be the y coordinate, and we remap coordinates to their fourth power
+ * to make the data more linear (which lets us reduce the table size).
+ */
+

@@ -11,0 +104,4 @@
+  return make_float2(u, sqr(r));
+}
+
+ccl_device_inline float spherical_ellipse_S(KernelGlobals kg, const float alpha, const float beta)

@@ -11,0 +116,4 @@
+}
+
+/* Importance-sample a spherical ellipse w.r.t. solid angle.
+ * Inputs are at and bt, the semi-major/minor axis of the tangential(!) ellipse.

@@ -628,6 +628,8 @@ void ShaderManager::device_update_common(Device * /*device*/,
   ktables->sheen_ltc = ensure_bsdf_table(dscene, scene, table_sheen_ltc);
   ktables->ggx_gen_schlick_ior_s = ensure_bsdf_table(dscene, scene, table_ggx_gen_schlick_ior_s);
   ktables->ggx_gen_schlick_s = ensure_bsdf_table(dscene, scene, table_ggx_gen_schlick_s);
+  ktables->ellipse_S = ensure_bsdf_table(dscene, scene, table_ellipse_S);