//
//   Copyright 2013 Pixar
//
//   Licensed under the Apache License, Version 2.0 (the "Apache License")
//   with the following modification; you may not use this file except in
//   compliance with the Apache License and the following modification to it:
//   Section 6. Trademarks. is deleted and replaced with:
//
//   6. Trademarks. This License does not grant permission to use the trade
//      names, trademarks, service marks, or product names of the Licensor
//      and its affiliates, except as required to comply with Section 4(c) of
//      the License and to reproduce the content of the NOTICE file.
//
//   You may obtain a copy of the Apache License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the Apache License with the above modification is
//   distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
//   KIND, either express or implied. See the Apache License for the specific
//   language governing permissions and limitations under the Apache License.
//

#ifndef OSD_CPU_COMPUTE_CONTEXT_H
#define OSD_CPU_COMPUTE_CONTEXT_H

#include "../version.h"

#include "../osd/nonCopyable.h"

#include <stdlib.h>

namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {

namespace Far{ class StencilTables; }

namespace Osd {

///
/// \brief CPU Compute Context
///
/// The CPU implementation of the Compute module contextual functionality.
///
/// The Osd Compute module provides functionality to interpolate primitive
/// variable data according to a subdivision scheme.
///
/// Contexts provide an interface between the serialized topological data
/// of a geometric primitive and the computation resources of a compute device.
///
class CpuComputeContext : private NonCopyable<CpuComputeContext> {

public:
    /// Creates an CpuComputeContext instance
    ///
    /// @param vertexStencilTables   The Far::StencilTables used for vertex
    ///                              interpolation
    ///
    /// @param varyingStencilTables  The Far::StencilTables used for varying
    ///                              interpolation
    ///
    static CpuComputeContext * Create(Far::StencilTables const * vertexStencilTables,
                                         Far::StencilTables const * varyingStencilTables=0);

    /// Destructor
    virtual ~CpuComputeContext();

    /// Returns the stencils data applied by this context for vertex interpolation
    Far::StencilTables const * GetVertexStencilTables() const {
        return _vertexStencilTables;
    }

    /// Returns the stencils data applied by this context for varying interpolation
    Far::StencilTables const * GetVaryingStencilTables() const {
        return _varyingStencilTables;
    }

protected:

    explicit CpuComputeContext(Far::StencilTables const * vertexStencilTables,
                                  Far::StencilTables const * varyingStencilTables=0);

private:

    Far::StencilTables const * _vertexStencilTables,
                           * _varyingStencilTables;
};

}  // end namespace Osd

}  // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;

}  // end namespace OpenSubdiv

#endif  // OSD_CPU_COMPUTE_CONTEXT_H