Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/osd/mtlPatchShaderSource.h

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+//
+//   Copyright 2013 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV3_OSD_MTL_PATCH_SHADER_SOURCE_H
+#define OPENSUBDIV3_OSD_MTL_PATCH_SHADER_SOURCE_H
+
+#import "../version.h"
+
+#import "../far/patchDescriptor.h"
+
+#import <string>
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Osd {
+
+/// \brief Provides shader source which can be used by client code.
+class MTLPatchShaderSource {
+public:
+    /// \brief Returns shader source which can be used to evaluate
+    /// position and first and second derivatives on piecewise parametric
+    /// patches resulting from subdivision refinement.
+    static std::string GetPatchBasisShaderSource();
+
+    /// \brief Returns shader source which can be used while drawing
+    /// piecewise parametric patches resulting from subdivision refinement,
+    /// e.g. while using GPU HW tessellation.
+    static std::string GetPatchDrawingShaderSource();
+
+    /// \name Alternative methods
+    /// \{
+    /// These methods return shader source which can be used
+    /// while drawing. Unlike the methods above, the source returned
+    /// by these methods includes support for legacy patch types along
+    /// with dependencies on specific resource bindings and interstage
+    /// shader variable declarations.
+
+    static std::string GetCommonShaderSource();
+
+    static std::string GetVertexShaderSource(Far::PatchDescriptor::Type type);
+
+    static std::string GetHullShaderSource(Far::PatchDescriptor::Type type);
+
+    static std::string GetDomainShaderSource(Far::PatchDescriptor::Type type);
+
+    /// These methods are deprecated. Clients should determine the
+    /// patch type of a face-varying patch by inspecting the
+    /// face-varying patch array descriptors.
+    /// \brief Deprecated
+    static std::string GetVertexShaderSource(
+        Far::PatchDescriptor::Type type,
+        Far::PatchDescriptor::Type fvarType);
+    static std::string GetHullShaderSource(
+        Far::PatchDescriptor::Type type,
+        Far::PatchDescriptor::Type fvarType);
+    static std::string GetDomainShaderSource(
+        Far::PatchDescriptor::Type type,
+        Far::PatchDescriptor::Type fvarType);
+
+    /// @}
+
+};
+
+}  // end namespace Osd
+
+}  // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+    
+} // end namespace OpenSubdiv
+
+#endif  // OPENSUBDIV3_OSD_MTL_PATCH_SHADER_SOURCE