Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/subd/patch.h

@@ -0,0 +1,48 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include "util/boundbox.h"
+#include "util/types.h"
+
+CCL_NAMESPACE_BEGIN
+
+class Patch {
+ public:
+  Patch() = default;
+  virtual ~Patch() = default;
+
+  virtual void eval(
+      float3 *P, float3 *dPdu, float3 *dPdv, float3 *N, const float u, float v) const = 0;
+
+  int patch_index = 0;
+  int shader = 0;
+  bool smooth = true;
+  bool from_ngon = false;
+};
+
+/* Linear Quad Patch */
+
+class LinearQuadPatch final : public Patch {
+ public:
+  float3 hull[4];
+
+  void eval(
+      float3 *P, float3 *dPdu, float3 *dPdv, float3 *N, const float u, float v) const override;
+  BoundBox bound();
+};
+
+/* Bicubic Patch */
+
+class BicubicPatch final : public Patch {
+ public:
+  float3 hull[16];
+
+  void eval(
+      float3 *P, float3 *dPdu, float3 *dPdv, float3 *N, const float u, float v) const override;
+  BoundBox bound();
+};
+
+CCL_NAMESPACE_END