glslComputeContext.h

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//
//   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_GLSL_COMPUTE_CONTEXT_H
#define OSD_GLSL_COMPUTE_CONTEXT_H

#include "../version.h"

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

#include <vector>

namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {

namespace Far{ class StencilTables; }

namespace Osd {

class GLSLComputeContext {

public:
    static GLSLComputeContext * Create(Far::StencilTables const * vertexStencilTables,
                                          Far::StencilTables const * varyingStencilTables=0);

    virtual ~GLSLComputeContext();

    bool HasVertexStencilTables() const;

    bool HasVaryingStencilTables() const;

    int GetNumControlVertices() const {
        return _numControlVertices;
    }

    GLuint GetVertexStencilTablesSizes() const;

    GLuint GetVertexStencilTablesOffsets() const;

    void BindVertexStencilTables() const;

    void BindVaryingStencilTables() const;

    void UnbindStencilTables() const;

protected:

    explicit GLSLComputeContext(Far::StencilTables const * vertexStencilTables,
                                   Far::StencilTables const * varyingStencilTables);

private:

    class GLSLStencilTables;

    GLSLStencilTables * _vertexStencilTables,
                      * _varyingStencilTables;

    int _numControlVertices;
};

}  // end namespace Osd

}  // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;

}  // end namespace OpenSubdiv

#endif  // OSD_GLSL_COMPUTE_CONTEXT_H